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WO2018146720A1 - Connecting/disconnecting device - Google Patents

Connecting/disconnecting device Download PDF

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Publication number
WO2018146720A1
WO2018146720A1 PCT/JP2017/004384 JP2017004384W WO2018146720A1 WO 2018146720 A1 WO2018146720 A1 WO 2018146720A1 JP 2017004384 W JP2017004384 W JP 2017004384W WO 2018146720 A1 WO2018146720 A1 WO 2018146720A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
insulating spacer
connection
tank
attachment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/004384
Other languages
French (fr)
Japanese (ja)
Inventor
隆史 加藤
博紀 矢永
靖憲 真田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba Energy Systems and Solutions Corp
Original Assignee
Toshiba Corp
Toshiba Energy Systems and Solutions Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Energy Systems and Solutions Corp filed Critical Toshiba Corp
Priority to PCT/JP2017/004384 priority Critical patent/WO2018146720A1/en
Publication of WO2018146720A1 publication Critical patent/WO2018146720A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00Installations of bus-bars
    • H02G5/06Totally-enclosed installations, e.g. in metal casings
    • H02G5/063Totally-enclosed installations, e.g. in metal casings filled with oil or gas
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00Installations of bus-bars
    • H02G5/06Totally-enclosed installations, e.g. in metal casings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00Installations of bus-bars
    • H02G5/06Totally-enclosed installations, e.g. in metal casings
    • H02G5/066Devices for maintaining distance between conductor and enclosure
    • H02G5/068Devices for maintaining distance between conductor and enclosure being part of the junction between two enclosures

Definitions

  • Embodiment of this invention is related with the attachment or detachment apparatus applied to a gas insulated switchgear.
  • the insulating spacer used in the gas-insulated switchgear serves as an insulating support that supports the conductor in an insulating gas such as SF 6 gas. Further, the insulating spacer has a role as a gas section that separates the pressure vessels filled with the insulating gas compressed at a high pressure while gas-sealing.
  • the existing side terminal portion that is the terminal end of the existing side tank 30 is referred to as the existing side A
  • the additional side terminal portion that is the end of the additional side tank 33 is referred to as the additional side B.
  • the insulation spacer 1 on the existing side A supports the conductor 2.
  • An end shield 3 that is a conductor for relaxing the electric field is detachably attached to the end of the conductor 2.
  • the conductor 2 and the end shield 3 are electrically connected via the contact C.
  • an end shield 5a for relaxing the electric field is also detachably attached to the end of the conductor 5 supported by the insulating spacer 4 on the additional side B.
  • the existing side A is hermetically sealed by an end tank 31
  • the additional side B is hermetically sealed by an end tank 32.
  • FIG. 22 shows an example of the procedure for adding a line for such a detachable device.
  • the existing end tank 31 and the additional end tank 32 are removed, and the end shield 3 and the end shield 5a are removed.
  • the connecting conductor 11 is inserted into the conductor 2 by applying a force in a direction perpendicular to the plane of the insulating spacer 1.
  • the connection conductor 11 is a member having a contactor having a function of adjusting the dimension between the insulating spacers 1 and 4 caused by an equipment installation dimensional tolerance and a part machining tolerance.
  • a detachable conductor 7 having at least two coupling surfaces is incorporated between the connection spacer 11 and the insulating spacer 4.
  • the detachable conductor 7 is bolted to the connecting conductor 11 and the insulating spacer 4.
  • connection conductor 11 when the connection conductor 11 is inserted with a force greater than the frictional force due to the contact contact load, the insertion is completed when the connection conductor 11 collides with the conductor 2. At this time, an impact load corresponding to the weight of the connection conductor 11 is applied to the conductor 2, and the force is transmitted to the insulating spacer 1.
  • the insulating spacer 1 receives pressure from a high-pressure insulating gas sealed in the tank 30 on the existing side A. In this state, it is problematic from the viewpoint of safety to apply the impact load generated at the end when the conductor is inserted as described above.
  • the gas pressure in the tank 30 on the existing side A must be reduced to about atmospheric pressure.
  • the disconnecting device when the disconnecting device is included in the gas section where the pressure is reduced on the existing side A, the function of the disconnecting device cannot be performed due to the decrease in gas pressure. As a result, the line having the disconnector must be stopped.
  • Embodiment of this invention aims at providing the attachment / detachment apparatus which can prevent that an impact force is added when the excessive pressure by the insulating gas has arisen in the insulating spacer.
  • the attachment / detachment device of the embodiment of the present invention includes an insulating spacer for gas classification connected to a tank of a gas insulated switchgear, a conductor supported by the insulating spacer, and a pluggable and electrically connected to the conductor, A connection conductor having a connection surface connectable to another conductor on the opposite side of the conductor, and the connection conductor is not connected to the other conductor when connected to the other conductor In some cases, it has a field relaxation function.
  • FIG. 22 is an axial cross-sectional view showing the connection / removal device of FIG.
  • the present embodiment is an attachment / detachment device configured on the existing side A, and has an insulating spacer 1, a conductor 2, and a connection conductor 6.
  • the insulating spacer 1 is a gas classification member connected to the tank 30 of the gas insulated switchgear.
  • the tank 30 is a metal container, and a flange is formed at an end thereof.
  • the tank 30 may have various shapes such as a circular cross section, an elliptical shape, an oval shape, a cylindrical shape such as a polygonal shape.
  • a cylindrical tank 30 will be described as an example.
  • the insulating spacer 1 is attached to the flange at the end of the tank 30 by, for example, bolt fastening or the like in the vicinity of the outer periphery of one surface, and seals the terminal end of the existing side A of the tank 30.
  • shape of the insulating spacer 1 various shapes such as a circle, an ellipse, an ellipse, and a polygon can be applied according to the cross-sectional shape of the tank 30. A conical shape or a blade shape may be applied.
  • a disk-shaped insulating space 1 will be described as an example.
  • the conductor 2 is a rod-shaped conductive member supported by the insulating spacer 1.
  • the conductor 2 constitutes a line of the gas-insulated switchgear and is disposed in the axial direction of the tank 30 (indicated by a one-dot chain line in the figure). It is attached by bolt fastening.
  • a cylindrical hole 2 a is formed in the end surface of the conductor 2 in the axial direction.
  • the conductor 2 may be configured so as to penetrate the center of the insulating spacer 1 from the tank 30 side in an airtight manner and be fixed to the insulating spacer 1 by bolt fastening or the like.
  • connection conductor 6 is a conductive member that is slidably and electrically connected to the conductor 2 and has a connection surface 62a between the conductor 2 and an internal conductor that is connected between the conductor 2 and the opposite conductor.
  • the connection conductor 6 is inserted into a hole 2a formed in the conductor 2, and is electrically connected to the conductor 2 via a contact C provided in the hole 2a.
  • the connection shape of the connection conductor 6 and the conductor 2 is not limited to the above, The connection conductor 6 should just be inserted in and extracted from the conductor 2 and electrically connected.
  • the connection conductor 6 has an electric field relaxation function when connected to other conductors such as a detachable conductor 7 described later and when not connected to other conductors.
  • the contact C may be provided on the connecting conductor 6 side.
  • the conductor 2 and the connection conductor 6 for example, aluminum or copper can be used.
  • the opposing conductor is a conductor 5 on the additional side B described later.
  • the internal conductor includes a detachable conductor 7 and a conductor 8 described later (see FIG. 2).
  • the connection conductor 6 has a contact 61 and an end shield 62.
  • the contact 61 is inserted into the hole 2 a of the conductor 2.
  • the contact 61 is slidably inserted into the hole 2a and is electrically connected to the conductor 2 via the contact C.
  • the conductor 2 is connected to the conductor 2 by some mechanical method so that it does not come off due to vibration or the like. It is fixed. For example, it is fixed by a bolt or the like.
  • the end shield 62 is an enlarged diameter portion formed continuously with the insertion portion 61 and is exposed to the outside of the conductor 2. This exposure means having a surface exposed from the conductor 2 to the outside, and may or may not have a portion protruding from the diameter of the conductor 2. In the present embodiment, an example in which a portion protruding from the diameter of the conductor 2 is provided will be described.
  • the end shield 62 has a shape having an electric field relaxation function.
  • the outer periphery of the end shield 62 is a continuous curved surface with no corners.
  • connection surface 62 a is a flat surface formed on the end shield 62.
  • the connection surface 62a is in contact with the detachable conductor 7 and has a cross-sectional area capable of supplying at least a rated current (see FIG. 2).
  • the connection surface 62a is formed with a screw hole capable of fastening a fastener such as a bolt or a screw.
  • Each contact surface of the conductor portion is subjected to silver plating for the purpose of stabilizing the contact resistance.
  • the tank 30 is filled with an insulating gas at a rated pressure.
  • An end tank 31 is airtightly attached to the insulating spacer 1 so as to cover the conductor 2 and the connection conductor 6.
  • An insulating gas is also sealed inside the end tank 31.
  • the insulating spacer 1 is of mechanical strength that can withstand even if there is a differential pressure in the gas pressure.
  • the insulating spacer 4 on the expansion side B is a member for gas classification connected to the tank 33 of the gas insulated switchgear.
  • the tank 33 is a metal container, and a flange is formed at an end thereof.
  • the insulating spacer 4 is attached to the flange at the end of the tank 33 by bolt fastening or the like in the vicinity of the outer periphery of one surface, and seals the end of the additional side B of the tank 33.
  • the conductor 5 is a rod-shaped conductive member supported by the insulating spacer 4.
  • the conductor 5 is disposed in the tank 33 and its end is attached to an electrode embedded in the insulating spacer 4 by bolt fastening or the like.
  • the tank 33, the insulating spacer 4, and the conductor 5 have basically the same configuration as the existing side A.
  • an end shield 5a for electric field relaxation is detachably attached to the surface of the insulating spacer 4 opposite to the conductor 5 of the electrode.
  • the inside of the tank 30 may be depressurized, for example, at the time of expansion. “Depressurize” indicates, for example, an enclosed gas pressure of 0.05 MPa-g or less.
  • the bellows bellows 34 is used for the expansion work.
  • the bellows bellows 34 is a metal bellows-shaped cylindrical body, has elasticity, and has flanges at both ends.
  • the detachable conductor 7 and the conductor 8 are used as internal conductors connecting the existing side A and the additional side B.
  • the detachable conductor 7 and the conductor 8 are conductive members having a substantially U-shaped cross section. However, it is not limited to this shape.
  • the end tank 32 and the end shield 5a on the expansion side B are removed.
  • the end tank 31 is removed using the space generated thereby.
  • the flange at one end of the bellows bellows 34 is compressed and connected to the insulating spacer 1 on the existing side A by bolt fastening or the like.
  • the detachable conductor 7 and the conductor 6 are connected by bolt fastening or the like.
  • the conductor 8 is connected to the conductor 5 through the electrode by being attached to the electrode of the insulating spacer 4.
  • the detachable conductor 7 and the conductor 8 are connected by bolt fastening or the like, the bellows bellows 34 is extended, and the other end is connected to the insulating spacer 4 on the extension side B by bolt fastening or the like.
  • the detachable conductor 7 is in contact with the connection surface 62a through one flat surface, and is in contact with the conductor 8 through the other flat surface.
  • the flat surface of the detachable conductor 7 and the connection surface 62a are fixed by, for example, bolt fastening using a screw hole formed in the connection surface 62a.
  • connection conductor 6 having a connection surface 62a that is connected and can be connected to another conductor, for example, an internal conductor, on the side opposite to the conductor 2 is provided.
  • the connecting conductor 6 can be used as it is without being inserted or removed. Therefore, as in the case of inserting the connecting conductor after removing the end shield, the insulating spacer 1 is applied with an impact load. Accidents such as rupture are prevented. Therefore, the expansion work can be performed without reducing the pressure in the tank 30, and the influence of the line stop can be prevented.
  • the detachable conductor 7 is separated from the insulating spacer 1 by the exposed length of the conductor 2 from the insulating spacer 1 and the exposed length of the connecting conductor 6 from the conductor 2. In this manner, since bolt fastening or the like can be performed at a position sufficiently away from the insulating spacer 1, bolt fastening or the like can be performed without damaging the insulating spacer 1 with a fastening tool. More specifically, since a screw hole into which a fastener such as a bolt for fastening the detachable conductor 7 is screwed is formed in the connection surface 62a farthest from the insulating spacer 1, the work location such as bolt fastening is It is sufficiently far from the insulating spacer 1.
  • connection conductor 6 is formed on the contact 61 inserted into the hole 2a formed at the end of the conductor 2, the end shield 62 exposed from the conductor 2, and the end shield 62, and constitutes the connection surface 62a. And a flat surface.
  • connection conductor 6 has a curved surface shape for electric field relaxation on the outer periphery, and the connection surface 62a has at least a cross-sectional area through which a rated current can be passed. Therefore, a safe state can be continuously maintained in both the withstand voltage test before the extension and the energization after the extension.
  • the end shield is configured to further include a part of the connection conductor 10 at the end of the conductor 9.
  • the shape of the conductor 9 supported by the insulating spacer 1 on the existing side A and the connecting conductor 10 connected to the conductor 9 is characteristic. That is, a hole 9 a is formed in the end surface of the conductor 9 in the axial direction, for example. Further, a curved surface portion 9 b is formed at the tip of the conductor 9.
  • the curved surface portion 9b has a shape expanded in a ring shape so that the cross section of the conductor 9 swells in a substantially hemispherical shape. That is, the curved surface portion 9b is formed by an arc having a larger radius R than when the corners are simply rounded.
  • connection conductor 10 has a contact 101 inserted into the hole 9a of the conductor 9 and a connection surface 102. That is, by inserting the conductor 10 into the conductor 9 and fixing it, the tip has a shape constituting an end shield having an electric field relaxation function.
  • connection surface 102 is formed with a screw hole capable of fastening a fastener such as a bolt.
  • the extension procedure of the present embodiment is the same as that of the first embodiment described above.
  • the detachable conductor 7 is fixed to the connection surface 102 by bolt fastening or the like using screw holes. .
  • connection conductor 10 and the conductor 9 constitutes an end shield having an electric field relaxation function.
  • the projecting dimension from the conductor 9 can be minimized. For this reason, the distance between the insulating spacer 1 and the insulating spacer 4, that is, the distance between the existing side A and the additional side B can be minimized.
  • the general connection conductor 11 has a connection surface for connecting to the detachable conductor 7, but the tip shape, that is, the finished dimension of the tip portion of the connection conductor 11 is connected. Since only the electric field relaxation function in a state where the conductor 11 and the detachable conductor 7 are connected is necessary, the radius Rx of the corner arc is small. For this reason, when it becomes a conductor edge part in the state where the detachable conductor 7 is not connected, it does not have an electric field relaxation function.
  • the conductor 9 and the conductor 10 have a connection surface 102 for connecting to the detachable conductor 7 and have an electric field relaxation function even if the detachable conductor 7 is not connected.
  • the tip shape that is, the finishing dimension of the tip portions of the conductors 9 and 10, the radius Ry of the arc is large. For this reason, the conductor 9 and the conductor 10 function as an end shield.
  • connection conductor 10 on the extension side B into the conductor 9 in advance, it is possible to perform connection without applying an impact load due to the insertion of the conductor into the insulating spacer 4 during the extension work. Further, it is possible to perform a bolt fastening operation at a position sufficiently away from the insulating spacer 4, and the conductor can be fastened without damaging the insulating spacer 4 with a fastening tool or the like.
  • the additional side B can be an existing facility. In other words, even in the attachment / detachment operation between two adjacent existing lines, the attachment / detachment operation can be performed without stopping the two existing lines.
  • the hand hole 35 a is a cylindrical opening provided in a part of the peripheral surface of the end tank 35.
  • the opening of the hand hole 35a is a size that allows an operator to insert a hand to perform work.
  • the opening is normally sealed.
  • the extension side B is connected to the insulating spacer 4 with the conductor 2 and the connection conductor 6 by bolt fastening or the like, and is further connected to the existing side A via the detachable conductor 7 in the same manner as the above-described existing side A.
  • the connection conductors 6 on the side A and the expansion side B can be connected by bolt fastening or the like.
  • a tank 35 having a hand hole 35 a is connected to the insulating spacer 1 on the existing side A. For this reason, since both sides of the insulating spacer 1 are sandwiched between the flanges of the tank 30 and the tank 35, the insulating spacer 1 can withstand the differential pressure due to the high-pressure gas even if the mechanical strength is relatively low. Further, when the insulating spacer 1 having a relatively high mechanical strength is used, the breaking strength is further improved.
  • the connecting surface 62 a for connecting to the detachable conductor 7 and the conductor 6 having an electric field relaxation function and a rated current energizing function are inserted in the conductor 2 in advance, so that the detachable conductor 7 is removed.
  • the expansion side B can withstand differential pressure even if the insulating spacer 4 with relatively low mechanical strength is used, and if the insulating spacer 4 with relatively high mechanical strength is used, higher safety is ensured. can do.
  • the slide bellows 36 is a device that has a pair of metallic cylindrical bodies, one cylindrical body is inserted into the other cylindrical body, and expands and contracts by sliding, and flanges are provided at both ends. .
  • the end tank 32 and the end shield 5a are removed.
  • the end tank 31 is removed using the space generated thereby.
  • a flange at one end is attached to the insulating spacer 1 on the existing side A by bolt fastening or the like.
  • the detachable conductor 7 and the conductor 10 are connected by bolt fastening or the like, and the conductor 8 is attached to the insulating spacer 4.
  • the detachable conductor 7 and the conductor 8 are connected by bolt fastening or the like, the slide bellows 36 is extended, and the other flange is attached to the insulation spacer 4 on the extension side B by bolt fastening or the like.
  • the insulating spacer 1 is attached to the tank 30, and further the gas pressure P generated in the insulating spacer 1 from the inside of the tank 30 in a state where the insulating spacer 1 is tightened from both sides by the ring 37.
  • pressure is applied.
  • the insulating spacer 1 Since the insulating spacer 1 is sandwiched and fixed between the flange of the tank 30 and the ring 37, the insulating spacer 1 is fixed to the positions of both ends of ⁇ A by the flange. In this state, when a high gas pressure P is applied to the insulating spacer 1, the deformation starts from the positions at both ends of ⁇ A and is deformed by the strain amount ⁇ 1.
  • the case where the insulating spacer 1 is fixed only on one side by the flange of the tank 30 is considered.
  • the insulating spacer 1 is fixed at both ends of ⁇ C by the flange and the stud of the tank 30.
  • the gas pressure P is applied to the insulating spacer 1 in this state, the deformation starts from the positions at both ends of ⁇ C and is deformed by the strain amount ⁇ 2.
  • the position where the insulating spacer 1 is fixed is ⁇ C> ⁇ A
  • the amount of deformation is ⁇ 2> ⁇ 1
  • the stress generated at that time is larger when only one side is fixed. That is, as compared with the case where the insulating spacer 1 is fixed from both sides, the one that is fixed only on one side has a lower breaking strength and is more likely to break.
  • the insulating spacer 1 when the insulating spacer 1 has a relatively high mechanical strength, it can withstand the differential pressure due to the high-pressure gas even when it is fixed to the flange only on one side.
  • the mechanical strength of the insulating spacer 1 is relatively weak, there are some that cannot withstand the differential pressure due to the high-pressure gas only by fixing with the flange on one side.
  • the both sides of the insulating spacer 1 are sandwiched and fixed by flange-like members, so that only the assembly of the attaching / detaching device is performed without reducing the gas pressure in the tank 30 or the tank 33 on the existing side A or the extension side B.
  • the mechanical strength can be improved.
  • the detachable conductor 7 on the existing side A and the detachable conductor 7 on the additional side B are connected by bolt fastening or the like, and the bellows bellows 34 is extended and attached to the insulating spacer 4 on the additional side B.
  • the configuration of this embodiment will be described with reference to FIGS.
  • the present embodiment is basically the same configuration as the third embodiment.
  • one end of a bellows bellows 34 of the attachment / detachment device is connected to the insulating spacer 1.
  • the other end of the bellows bellows 34 is sealed with a cover 40.
  • One end of an end tank 38 is connected to the insulating spacer 4 and the other end is sealed with a cover 40.
  • the insulating spacers 1 and 4 used may have a relatively low mechanical strength or a high one.
  • the bellows bellows 34 and the tank 38 are separated end tanks, the number of parts required for a series of attaching and detaching operations is reduced, which contributes to cost reduction.
  • the existing side A is the tank 38 and the additional side B is the bellows bellows 34.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Installation Of Bus-Bars (AREA)

Abstract

[Problem] To provide a connecting/disconnecting device capable of preventing impact force from being applied when excessive pressure due to an insulating gas occurs on an insulating spacer. [Solution] A connecting/disconnecting device has: a gas partition insulating spacer 1 connected to a tank 30 of a gas insulated switchgear; a conductor 2 supported by the insulating spacer 1; and a connection conductor 6 electrically connected to the conductor 2 and having a connection surface 62a on the opposite side to the conductor 2, said connection surface 62a being capable of being connected to another conductor. The connection conductor 6 has a structure capable of being inserted/extracted into/from the conductor 2 through a contact point and, even when not connected to a connecting/disconnecting conductor, has an electric field relaxation function in the connection region.

Description

着脱装置Detachable device

 本発明の実施形態は、ガス絶縁開閉装置に適用される着脱装置に関する。 Embodiment of this invention is related with the attachment or detachment apparatus applied to a gas insulated switchgear.

 ガス絶縁開閉装置に用いられている絶縁スペーサは、SFガスなどの絶縁性ガスの中で導体を支持する絶縁支持物としての役割を有する。また、絶縁スペーサは、高い圧力で圧縮された絶縁性ガスが封入された圧力容器間をガスシールしつつ切り離すガス区分としての役割を有する。 The insulating spacer used in the gas-insulated switchgear serves as an insulating support that supports the conductor in an insulating gas such as SF 6 gas. Further, the insulating spacer has a role as a gas section that separates the pressure vessels filled with the insulating gas compressed at a high pressure while gas-sealing.

 近年では、回線停止の影響を少なくするため、変電所の増設工事などの際に、既設回線を停止することなく、活線状態のままで作業を実施することが望まれている。このため、高い圧力で圧縮されたSFガスを封入している絶縁スペーサの近傍で、増設工事を実施できる構造が要求されている。 In recent years, in order to reduce the influence of line stoppage, it is desired that work be performed in a live line state without stopping an existing line during substation expansion work or the like. For this reason, there is a demand for a structure that can be expanded in the vicinity of an insulating spacer that encloses SF 6 gas compressed at a high pressure.

 この構造を実現する機器として、着脱装置の一例を、図21を参照して説明する。以下の説明では、既設側のタンク30の終端である既設側終端部を既設側A、増設側のタンク33の終端である増設側終端部を増設側Bとする。既設側Aの絶縁スペーサ1は、導体2を支持している。この導体2の端部には、電界緩和用の導体であるエンドシールド3が着脱可能に取り付けられている。導体2とエンドシールド3とは、接点Cを介して電気的に接続されている。一方、増設側Bの絶縁スペーサ4に支持された導体5の端部にも、電界緩和用のエンドシールド5aが着脱可能に取り付けられている。さらに、既設側Aはエンドタンク31により、増設側Bはエンドタンク32により、気密封止されている。 An example of an attachment / detachment device as a device for realizing this structure will be described with reference to FIG. In the following description, the existing side terminal portion that is the terminal end of the existing side tank 30 is referred to as the existing side A, and the additional side terminal portion that is the end of the additional side tank 33 is referred to as the additional side B. The insulation spacer 1 on the existing side A supports the conductor 2. An end shield 3 that is a conductor for relaxing the electric field is detachably attached to the end of the conductor 2. The conductor 2 and the end shield 3 are electrically connected via the contact C. On the other hand, an end shield 5a for relaxing the electric field is also detachably attached to the end of the conductor 5 supported by the insulating spacer 4 on the additional side B. Further, the existing side A is hermetically sealed by an end tank 31, and the additional side B is hermetically sealed by an end tank 32.

 このような着脱装置の回線増設の手順の一例を、図22に示す。まず、既設側のエンドタンク31、増設側のエンドタンク32を取り外し、エンドシールド3およびエンドシールド5aを取り外す。そして、接続導体11を、導体2に絶縁スペーサ1の平面に直交する方向に力を加えて差し込む。接続導体11は、機器据付寸法公差および部品の加工公差等により生じる絶縁スペーサ1、4間の寸法調整機能をもつ接触子を持つ部材である。接続導体11を挿入後、絶縁スペーサ4との間に、少なくとも2つの取合面を持つ着脱導体7を組み込む。着脱導体7は、接続導体11および絶縁スペーサ4とボルト締結する。 FIG. 22 shows an example of the procedure for adding a line for such a detachable device. First, the existing end tank 31 and the additional end tank 32 are removed, and the end shield 3 and the end shield 5a are removed. Then, the connecting conductor 11 is inserted into the conductor 2 by applying a force in a direction perpendicular to the plane of the insulating spacer 1. The connection conductor 11 is a member having a contactor having a function of adjusting the dimension between the insulating spacers 1 and 4 caused by an equipment installation dimensional tolerance and a part machining tolerance. After the connection conductor 11 is inserted, a detachable conductor 7 having at least two coupling surfaces is incorporated between the connection spacer 11 and the insulating spacer 4. The detachable conductor 7 is bolted to the connecting conductor 11 and the insulating spacer 4.

実開昭59-159128号公報Japanese Utility Model Publication No.59-159128

 上記のような着脱装置においては、接点接触荷重による摩擦力以上の力で接続導体11を挿入した際に、導体2に接続導体11が衝突することで挿入が完了する。この際に接続導体11の重量分の衝撃荷重が導体2に加わり、その力は絶縁スペーサ1に伝わる。通常、絶縁スペーサ1は既設側Aのタンク30の内部に封入された高圧の絶縁性ガスにより、圧力を受けている。この状態で、上記のような導体挿入時の最後に発生する衝撃荷重を加えることは、安全面上から問題がある。 In the above attachment / detachment apparatus, when the connection conductor 11 is inserted with a force greater than the frictional force due to the contact contact load, the insertion is completed when the connection conductor 11 collides with the conductor 2. At this time, an impact load corresponding to the weight of the connection conductor 11 is applied to the conductor 2, and the force is transmitted to the insulating spacer 1. Usually, the insulating spacer 1 receives pressure from a high-pressure insulating gas sealed in the tank 30 on the existing side A. In this state, it is problematic from the viewpoint of safety to apply the impact load generated at the end when the conductor is inserted as described above.

 このため、増設作業では、既設側Aのタンク30のガス圧を、大気圧程度まで減圧しなければならない。しかし、既設側Aの減圧するガス区画に、断路器が含まれる場合は、ガス圧減少により断路器の機能を果たすことができなくなる。すると、結果としてその断路器を有する回線は停止しなければならない。 For this reason, in the expansion work, the gas pressure in the tank 30 on the existing side A must be reduced to about atmospheric pressure. However, when the disconnecting device is included in the gas section where the pressure is reduced on the existing side A, the function of the disconnecting device cannot be performed due to the decrease in gas pressure. As a result, the line having the disconnector must be stopped.

 本発明の実施形態は、絶縁スペーサに絶縁性ガスによる過大な圧力が生じている際に、衝撃力が加わることを防止できる着脱装置を提供することを目的とする。 Embodiment of this invention aims at providing the attachment / detachment apparatus which can prevent that an impact force is added when the excessive pressure by the insulating gas has arisen in the insulating spacer.

 本発明の実施形態の着脱装置は、ガス絶縁開閉装置のタンクに接続されたガス区分用の絶縁スペーサと、前記絶縁スペーサに支持された導体と、前記導体に挿抜可能且つ電気的に接続され、前記導体と反対側に他の導体と接続可能な接続面を有する接続導体と、を有し、前記接続導体は、前記他の導体と接続している場合および前記他の導体と接続していない場合に電界緩和機能を有する。 The attachment / detachment device of the embodiment of the present invention includes an insulating spacer for gas classification connected to a tank of a gas insulated switchgear, a conductor supported by the insulating spacer, and a pluggable and electrically connected to the conductor, A connection conductor having a connection surface connectable to another conductor on the opposite side of the conductor, and the connection conductor is not connected to the other conductor when connected to the other conductor In some cases, it has a field relaxation function.

第1の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is an axial sectional view showing the state before connection of the internal conductor of the attachment / detachment device of the first embodiment. 第1の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is an axial sectional view showing the inner conductor after the attachment / detachment device of the first embodiment is connected. 第2の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is an axial direction sectional view showing an internal conductor before connection of an attachment / detachment device of a 2nd embodiment. 第2の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is an axial sectional view showing the internal conductor of the detachable apparatus according to the second embodiment after connection. 接続導体の曲面の円弧の半径を示す説明図である。It is explanatory drawing which shows the radius of the circular arc of the curved surface of a connection conductor. 第2の実施形態の接続導体の曲面の円弧の半径を示す説明図である。It is explanatory drawing which shows the radius of the circular arc of the curved surface of the connection conductor of 2nd Embodiment. 第3の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is axial direction sectional drawing which shows the internal conductor connection of the attachment / detachment apparatus of 3rd Embodiment before. 第3の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is an axial direction sectional view showing after the internal conductor connection of the attachment / detachment device of a 3rd embodiment. 第4の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is axial direction sectional drawing which shows the inner conductor connection of the attachment / detachment apparatus of 4th Embodiment. 第4の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is an axial sectional view showing the internal conductor after the attachment / detachment device of the fourth embodiment is connected. 第4の実施形態の着脱装置の他の態様を示す軸方向断面図である。It is an axial sectional view showing another aspect of the attachment / detachment device of the fourth embodiment. 第5の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is axial direction sectional drawing which shows the internal conductor connection after the attachment / detachment apparatus of 5th Embodiment. 第6の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is axial direction sectional drawing which shows the internal conductor connection of the attachment / detachment apparatus of 6th Embodiment. 第6の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is axial direction sectional drawing which shows the internal conductor connection after the attachment / detachment apparatus of 6th Embodiment. 絶縁スペーサにかかる応力を示す説明図である。It is explanatory drawing which shows the stress concerning an insulating spacer. 絶縁スペーサにかかる応力を示す説明図である。It is explanatory drawing which shows the stress concerning an insulating spacer. 第7の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is axial direction sectional drawing which shows the internal conductor connection of the attachment / detachment apparatus of 7th Embodiment. 第7の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is an axial direction sectional view showing after the internal conductor connection of the attachment / detachment device of a 7th embodiment. 第8の実施形態の着脱装置の内部導体接続前を示す軸方向断面図である。It is axial direction sectional drawing which shows the inner conductor connection of the attachment / detachment apparatus of 8th Embodiment. 第8の実施形態の着脱装置の内部導体接続後を示す軸方向断面図である。It is axial direction sectional drawing which shows the internal conductor connection of the attachment / detachment apparatus of 8th Embodiment. 着脱装置の内部導体接続前を示す軸方向断面図である。It is an axial sectional view showing the internal conductor before connecting and disconnecting device. 図21の着脱装置の内部導体接続後を示す軸方向断面図である。FIG. 22 is an axial cross-sectional view showing the connection / removal device of FIG.

[第1の実施形態]
(構成)
 本実施形態の構成を、図1及び図2を参照して説明する。本実施形態は、既設側Aに構成された着脱装置であり、絶縁スペーサ1、導体2、接続導体6を有する。絶縁スペーサ1は、ガス絶縁開閉装置のタンク30に接続されたガス区分用の部材である。タンク30は、金属製の容器であり、その端部にフランジが形成されている。タンク30は、例えば、断面が円、楕円、長円、多角形状等の筒形とするなど、種々の形状のものが適用できる。本実形態では、円筒形状のタンク30を一例として説明する。絶縁スペーサ1は、一方の面の外周近傍がタンク30の端部のフランジに、例えばボルト締結等により取り付けられ、タンク30の既設側Aの終端を封止している。絶縁スペーサ1の形状も、タンク30の断面形状に応じて、円、楕円、長円、多角形状等、種々の形状のものが適用できる。円錐形状、ブレード形状のものを適用してもよい。本実施形態では、円板形状の絶縁スペース1を一例として説明する。
[First Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIGS. 1 and 2. The present embodiment is an attachment / detachment device configured on the existing side A, and has an insulating spacer 1, a conductor 2, and a connection conductor 6. The insulating spacer 1 is a gas classification member connected to the tank 30 of the gas insulated switchgear. The tank 30 is a metal container, and a flange is formed at an end thereof. For example, the tank 30 may have various shapes such as a circular cross section, an elliptical shape, an oval shape, a cylindrical shape such as a polygonal shape. In this embodiment, a cylindrical tank 30 will be described as an example. The insulating spacer 1 is attached to the flange at the end of the tank 30 by, for example, bolt fastening or the like in the vicinity of the outer periphery of one surface, and seals the terminal end of the existing side A of the tank 30. As the shape of the insulating spacer 1, various shapes such as a circle, an ellipse, an ellipse, and a polygon can be applied according to the cross-sectional shape of the tank 30. A conical shape or a blade shape may be applied. In the present embodiment, a disk-shaped insulating space 1 will be described as an example.

 導体2は、絶縁スペーサ1に支持された棒状の導電性の部材である。導体2は、ガス絶縁開閉装置の回線を構成し、タンク30の軸方向(図中、一点鎖線で示す)に配置され、例えばその端部が絶縁スペーサ1に機械的に埋め込まれた電極に、ボルト締結等により取り付けられている。導体2の端面には、軸方向に円柱形状の穴2aが形成されている。導体2の構成は、タンク30側より絶縁スペーサ1の中心に気密に貫通した上で絶縁スペーサ1にボルト締結等により固定される場合も可である。 The conductor 2 is a rod-shaped conductive member supported by the insulating spacer 1. The conductor 2 constitutes a line of the gas-insulated switchgear and is disposed in the axial direction of the tank 30 (indicated by a one-dot chain line in the figure). It is attached by bolt fastening. A cylindrical hole 2 a is formed in the end surface of the conductor 2 in the axial direction. The conductor 2 may be configured so as to penetrate the center of the insulating spacer 1 from the tank 30 side in an airtight manner and be fixed to the insulating spacer 1 by bolt fastening or the like.

 接続導体6は、導体2に摺動可能且つ電気的に接続され、導体2とこれに対向する導体との間に接続される内部導体との接続面62aを有する導電性の部材である。接続導体6は、導体2に形成された穴2aに挿入されており、穴2aに設けられた接点Cを介して、導体2と電気的に接続されている。なお、接続導体6と導体2との接続形状は上記には限定されず、接続導体6は導体2に挿抜可能且つ電気的に接続されていればよい。また、接続導体6は、後述する着脱導体7等の他の導体と接続している場合および他の導体と接続していない場合に電界緩和機能を有する。また、接点Cは、接続導体6側に設けられていてもよい。導体2、接続導体6としては、例えば、アルミニウムや銅を用いることができる。対向する導体は、後述する増設側Bの導体5である。内部導体は、後述する着脱導体7、導体8を含む(図2参照)。 The connection conductor 6 is a conductive member that is slidably and electrically connected to the conductor 2 and has a connection surface 62a between the conductor 2 and an internal conductor that is connected between the conductor 2 and the opposite conductor. The connection conductor 6 is inserted into a hole 2a formed in the conductor 2, and is electrically connected to the conductor 2 via a contact C provided in the hole 2a. In addition, the connection shape of the connection conductor 6 and the conductor 2 is not limited to the above, The connection conductor 6 should just be inserted in and extracted from the conductor 2 and electrically connected. Further, the connection conductor 6 has an electric field relaxation function when connected to other conductors such as a detachable conductor 7 described later and when not connected to other conductors. Further, the contact C may be provided on the connecting conductor 6 side. As the conductor 2 and the connection conductor 6, for example, aluminum or copper can be used. The opposing conductor is a conductor 5 on the additional side B described later. The internal conductor includes a detachable conductor 7 and a conductor 8 described later (see FIG. 2).

 接続導体6は、接触子61と、エンドシールド62を有する。接触子61は、導体2の穴2aに挿入されている。この接触子61が、穴2aに摺動可能に挿入され、接点Cを介して導体2と電気的に接続されており、振動等で外れないように導体2に、何等かの機械的方法によって固定されている。例えば、ボルト等によって固定されている。 The connection conductor 6 has a contact 61 and an end shield 62. The contact 61 is inserted into the hole 2 a of the conductor 2. The contact 61 is slidably inserted into the hole 2a and is electrically connected to the conductor 2 via the contact C. The conductor 2 is connected to the conductor 2 by some mechanical method so that it does not come off due to vibration or the like. It is fixed. For example, it is fixed by a bolt or the like.

 エンドシールド62は、挿入部61に連続して形成された拡径部分であり、導体2の外部に露出している。この露出とは、導体2から外部に表出している面を有していることを言い、導体2の径から突出した部分を有していても、有していなくてもよい。本実施形態では、導体2の径よりも突出した部分を有している例で説明する。エンドシールド62は、電界緩和機能を有する形状を有している。例えば、エンドシールド62の外周は、連続した曲面で、角がない形状となっている。 The end shield 62 is an enlarged diameter portion formed continuously with the insertion portion 61 and is exposed to the outside of the conductor 2. This exposure means having a surface exposed from the conductor 2 to the outside, and may or may not have a portion protruding from the diameter of the conductor 2. In the present embodiment, an example in which a portion protruding from the diameter of the conductor 2 is provided will be described. The end shield 62 has a shape having an electric field relaxation function. For example, the outer periphery of the end shield 62 is a continuous curved surface with no corners.

 接続面62aは、エンドシールド62に形成された平坦面である。接続面62aは、着脱導体7と接して少なくとも定格電流を通電できる断面積を有している(図2参照)。また、図示はしないが、接続面62aには、ボルト、ネジ等の締結具を締結可能なネジ穴が形成されている。なお、上記の導体部分の各接触面には、接触抵抗を安定させる目的で銀メッキ処理等が施されている。 The connection surface 62 a is a flat surface formed on the end shield 62. The connection surface 62a is in contact with the detachable conductor 7 and has a cross-sectional area capable of supplying at least a rated current (see FIG. 2). Although not shown, the connection surface 62a is formed with a screw hole capable of fastening a fastener such as a bolt or a screw. Each contact surface of the conductor portion is subjected to silver plating for the purpose of stabilizing the contact resistance.

 さらに、タンク30の内部には、定格圧力の絶縁性ガスが封入されている。そして、導体2、接続導体6を覆うように、エンドタンク31が、絶縁スペーサ1に気密に取り付けられている。エンドタンク31内部にも、絶縁性ガスが封入されている。絶縁スペーサ1は、ガス圧に差圧があっても耐え得る機械強度のものが用いられる。 Furthermore, the tank 30 is filled with an insulating gas at a rated pressure. An end tank 31 is airtightly attached to the insulating spacer 1 so as to cover the conductor 2 and the connection conductor 6. An insulating gas is also sealed inside the end tank 31. The insulating spacer 1 is of mechanical strength that can withstand even if there is a differential pressure in the gas pressure.

 次に、上記のような既設側Aに接続される増設側Bの構成を説明する。増設側Bの絶縁スペーサ4は、ガス絶縁開閉装置のタンク33に接続されたガス区分用の部材である。タンク33は、金属製の容器であり、その端部にフランジが形成されている。絶縁スペーサ4は、一方の面の外周近傍がタンク33の端部のフランジにボルト締結等により取り付けられ、タンク33の増設側Bの終端を封止している。 Next, the configuration of the expansion side B connected to the existing side A as described above will be described. The insulating spacer 4 on the expansion side B is a member for gas classification connected to the tank 33 of the gas insulated switchgear. The tank 33 is a metal container, and a flange is formed at an end thereof. The insulating spacer 4 is attached to the flange at the end of the tank 33 by bolt fastening or the like in the vicinity of the outer periphery of one surface, and seals the end of the additional side B of the tank 33.

 導体5は、絶縁スペーサ4に支持された棒状の導電性の部材である。導体5は、タンク33に配置され、その端部がボルト締結等により絶縁スペーサ4に埋め込まれた電極に取り付けられている。タンク33、絶縁スペーサ4、導体5は、基本的には既設側Aと同様の構成である。 The conductor 5 is a rod-shaped conductive member supported by the insulating spacer 4. The conductor 5 is disposed in the tank 33 and its end is attached to an electrode embedded in the insulating spacer 4 by bolt fastening or the like. The tank 33, the insulating spacer 4, and the conductor 5 have basically the same configuration as the existing side A.

 但し、絶縁スペーサ4の電極の導体5と反対面には、電界緩和用のエンドシールド5aが着脱可能に取り付けられている。さらに、タンク30内部は、例えば、増設時には、減圧する場合がある。「減圧する」とは、例えば、0.05MPa-g以下の封入ガス圧を示す。 However, an end shield 5a for electric field relaxation is detachably attached to the surface of the insulating spacer 4 opposite to the conductor 5 of the electrode. Furthermore, the inside of the tank 30 may be depressurized, for example, at the time of expansion. “Depressurize” indicates, for example, an enclosed gas pressure of 0.05 MPa-g or less.

(増設手順)
 以上のような本実施形態による増設手順を、図1及び図2を参照して説明する。なお、増設作業には、蛇腹ベローズ34を用いる。蛇腹ベローズ34は、金属製の蛇腹形状の筒状体で、伸縮性を有し、両端にフランジが設けられている。また、既設側Aと増設側Bを接続する内部導体として、着脱導体7、導体8を用いる。例えば、着脱導体7および導体8は、断面が略コの字状の導電性の部材である。但し、この形状には限定されない。
(Expansion procedure)
The extension procedure according to the present embodiment as described above will be described with reference to FIGS. The bellows bellows 34 is used for the expansion work. The bellows bellows 34 is a metal bellows-shaped cylindrical body, has elasticity, and has flanges at both ends. Further, the detachable conductor 7 and the conductor 8 are used as internal conductors connecting the existing side A and the additional side B. For example, the detachable conductor 7 and the conductor 8 are conductive members having a substantially U-shaped cross section. However, it is not limited to this shape.

 まず、増設側Bのエンドタンク32とエンドシールド5aを取り外す。これにより生じた空間を利用して、エンドタンク31を取り外す。その後、蛇腹ベローズ34の一端のフランジを、圧縮した状態で、既設側Aの絶縁スペーサ1に、ボルト締結等により接続する。次に、着脱導体7と導体6をボルト締結等により接続する。一方、導体8は、絶縁スペーサ4の電極に取り付けることにより、電極を介して導体5に接続する。最後に、着脱導体7と導体8をボルト締結等により接続し、蛇腹ベローズ34を伸張して、他端を増設側Bの絶縁スペーサ4にボルト締結等により接続する。 First, the end tank 32 and the end shield 5a on the expansion side B are removed. The end tank 31 is removed using the space generated thereby. Thereafter, the flange at one end of the bellows bellows 34 is compressed and connected to the insulating spacer 1 on the existing side A by bolt fastening or the like. Next, the detachable conductor 7 and the conductor 6 are connected by bolt fastening or the like. On the other hand, the conductor 8 is connected to the conductor 5 through the electrode by being attached to the electrode of the insulating spacer 4. Finally, the detachable conductor 7 and the conductor 8 are connected by bolt fastening or the like, the bellows bellows 34 is extended, and the other end is connected to the insulating spacer 4 on the extension side B by bolt fastening or the like.

 着脱導体7は、一方の平坦面により接続面62aと接し、他方の平坦面により導体8と接する。着脱導体7の平坦面と接続面62aとは、例えば、接続面62aに形成されたネジ穴を利用して、ボルト締結等により固定されている。 The detachable conductor 7 is in contact with the connection surface 62a through one flat surface, and is in contact with the conductor 8 through the other flat surface. The flat surface of the detachable conductor 7 and the connection surface 62a are fixed by, for example, bolt fastening using a screw hole formed in the connection surface 62a.

(作用効果)
 以上のような本実施形態は、ガス絶縁開閉装置のタンク30に接続されたガス区分用の絶縁スペーサ1と、絶縁スペーサ1に支持された導体2と、導体2に摺動可能且つ電気的に接続され、導体2と反対側に他の導体、例えば、内部導体と接続可能な接続面62aを有する接続導体6とを有する。
(Function and effect)
In the present embodiment as described above, the gas separation insulating spacer 1 connected to the tank 30 of the gas insulated switchgear, the conductor 2 supported by the insulating spacer 1, the conductor 2 is slidable and electrically. A connection conductor 6 having a connection surface 62a that is connected and can be connected to another conductor, for example, an internal conductor, on the side opposite to the conductor 2 is provided.

 このため、増設作業を行う際に、接続導体6を抜き差しすることなく、そのまま導体として利用できるので、エンドシールドを取り外して接続導体を挿入する場合のように、衝撃荷重が加わって絶縁スペーサ1が破裂する等の事故が防止される。従って、タンク30内を減圧しなくとも、増設作業を行うことができ、回線停止による影響を防止できる。 For this reason, when the expansion work is performed, the connecting conductor 6 can be used as it is without being inserted or removed. Therefore, as in the case of inserting the connecting conductor after removing the end shield, the insulating spacer 1 is applied with an impact load. Accidents such as rupture are prevented. Therefore, the expansion work can be performed without reducing the pressure in the tank 30, and the influence of the line stop can be prevented.

 また、着脱導体7は、絶縁スペーサ1からの導体2の露出長と、導体2からの接続導体6の露出長だけ、絶縁スペーサ1から離れている。このように、絶縁スペーサ1から十分離れた位置でのボルト締結等の作業が可能となるため、締結工具により絶縁スペーサ1を傷つけることなく、ボルト締結等が可能となる。より具体的には、絶縁スペーサ1から最も離れた接続面62aに、着脱導体7を締結するボルト等の締結具がネジ込まれるネジ穴が形成されているので、ボルト締結等の作業箇所が、絶縁スペーサ1から十分に遠くなる。 The detachable conductor 7 is separated from the insulating spacer 1 by the exposed length of the conductor 2 from the insulating spacer 1 and the exposed length of the connecting conductor 6 from the conductor 2. In this manner, since bolt fastening or the like can be performed at a position sufficiently away from the insulating spacer 1, bolt fastening or the like can be performed without damaging the insulating spacer 1 with a fastening tool. More specifically, since a screw hole into which a fastener such as a bolt for fastening the detachable conductor 7 is screwed is formed in the connection surface 62a farthest from the insulating spacer 1, the work location such as bolt fastening is It is sufficiently far from the insulating spacer 1.

 また、接続導体6は、導体2の端部に形成された穴2aに挿入される接触子61と、導体2から露出したエンドシールド62と、エンドシールド62に形成され、接続面62aを構成する平坦面と、を有する。 The connection conductor 6 is formed on the contact 61 inserted into the hole 2a formed at the end of the conductor 2, the end shield 62 exposed from the conductor 2, and the end shield 62, and constitutes the connection surface 62a. And a flat surface.

 このため、接触子61による導体2との接続、平坦面である接続面62aによって定格電流通電機能を確保するとともに、エンドシールド62によって電界緩和機能を確保している。より具体的には、接続導体6は、外周に電界緩和のための曲面形状を有し、接続面62aは少なくとも定格電流を通電できる断面積を有している。従って、増設前の耐電圧試験、増設後の通電のいずれにおいても、安全な状態を継続して維持できる。 For this reason, the connection with the conductor 2 by the contactor 61 and the connection surface 62a which is a flat surface ensure the rated current energizing function and the end shield 62 ensures the electric field relaxation function. More specifically, the connection conductor 6 has a curved surface shape for electric field relaxation on the outer periphery, and the connection surface 62a has at least a cross-sectional area through which a rated current can be passed. Therefore, a safe state can be continuously maintained in both the withstand voltage test before the extension and the energization after the extension.

[第2の実施形態]
(構成)
 本実施形態の構成を、図3を参照して説明する。本実施形態は、基本的には、上記の第1の実施形態と同様の構成である。但し、本実施形態は、エンドシールドが、導体9の端部に、さらに接続導体10の一部を含み構成されている。このため、既設側Aの絶縁スペーサ1に支持された導体9と、導体9に接続された接続導体10の形状に特徴がある。すなわち、導体9の端面には、例えば軸方向に穴9aが形成されている。また、導体9の先端には、曲面部9bが形成されている。例えば、曲面部9bは、導体9の断面が略半球状に膨らむように、リング状に拡径された形状となっている。つまり、単に角に丸みを持たせた場合よりも大きな半径Rの円弧で、曲面部9bが形成されている。
[Second Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIG. This embodiment is basically the same configuration as the first embodiment. However, in the present embodiment, the end shield is configured to further include a part of the connection conductor 10 at the end of the conductor 9. For this reason, the shape of the conductor 9 supported by the insulating spacer 1 on the existing side A and the connecting conductor 10 connected to the conductor 9 is characteristic. That is, a hole 9 a is formed in the end surface of the conductor 9 in the axial direction, for example. Further, a curved surface portion 9 b is formed at the tip of the conductor 9. For example, the curved surface portion 9b has a shape expanded in a ring shape so that the cross section of the conductor 9 swells in a substantially hemispherical shape. That is, the curved surface portion 9b is formed by an arc having a larger radius R than when the corners are simply rounded.

 一方、接続導体10は、導体9の穴9aに挿入される接触子101と、接続面102を有する。つまり、導体10を導体9に挿入して固定することにより、先端が電界緩和機能を有するエンドシールドを構成する形状となる。接続面102には、図示はしないが、例えば、ボルト等の締結具を締結可能なネジ穴が形成されている。 On the other hand, the connection conductor 10 has a contact 101 inserted into the hole 9a of the conductor 9 and a connection surface 102. That is, by inserting the conductor 10 into the conductor 9 and fixing it, the tip has a shape constituting an end shield having an electric field relaxation function. Although not shown, the connection surface 102 is formed with a screw hole capable of fastening a fastener such as a bolt.

 本実施形態の増設の手順は、上記の第1の実施形態と同様であり、図4に示すように、接続面102に、ネジ穴を利用して着脱導体7がボルト締結等により固定される。 The extension procedure of the present embodiment is the same as that of the first embodiment described above. As shown in FIG. 4, the detachable conductor 7 is fixed to the connection surface 102 by bolt fastening or the like using screw holes. .

(作用効果)
 以上のような本実施形態は、上記の第1の実施形態と同様の作用効果が得られるとともに、接続導体10と導体9の端部により、電界緩和機能を有するエンドシールドが構成されるため、導体9からの突出寸法を最小限に抑えることができる。このため、絶縁スペーサ1と絶縁スペーサ4との間の距離、すなわち既設側Aと増設側Bとの間の距離を、最小限に抑えることが可能となる。
(Function and effect)
In the present embodiment as described above, the same effect as the first embodiment can be obtained, and the end portion of the connection conductor 10 and the conductor 9 constitutes an end shield having an electric field relaxation function. The projecting dimension from the conductor 9 can be minimized. For this reason, the distance between the insulating spacer 1 and the insulating spacer 4, that is, the distance between the existing side A and the additional side B can be minimized.

 図5に示すように、一般的な接続導体11は、着脱導体7と接続するための接続面を有しているが、先端形状、つまり、接続導体11の先端部の仕上げ加工寸法は、接続導体11と着脱導体7が繋がった状態での電界緩和の機能しか必要ないので、角の円弧の半径Rxが小さい。このため、着脱導体7が接続されていない状態での導体端部となった際には、電界緩和機能を有していない。 As shown in FIG. 5, the general connection conductor 11 has a connection surface for connecting to the detachable conductor 7, but the tip shape, that is, the finished dimension of the tip portion of the connection conductor 11 is connected. Since only the electric field relaxation function in a state where the conductor 11 and the detachable conductor 7 are connected is necessary, the radius Rx of the corner arc is small. For this reason, when it becomes a conductor edge part in the state where the detachable conductor 7 is not connected, it does not have an electric field relaxation function.

 一方、図6に示すように、導体9および導体10は、着脱導体7と接続するための接続面102を有し、かつ着脱導体7が接続されていなくても、電界緩和機能を有するように先端形状、つまり導体9、10の先端部の仕上げ加工寸法は、円弧の半径Ryが大きくなっている。このため、導体9および導体10はエンドシールドとして機能する。 On the other hand, as shown in FIG. 6, the conductor 9 and the conductor 10 have a connection surface 102 for connecting to the detachable conductor 7 and have an electric field relaxation function even if the detachable conductor 7 is not connected. As for the tip shape, that is, the finishing dimension of the tip portions of the conductors 9 and 10, the radius Ry of the arc is large. For this reason, the conductor 9 and the conductor 10 function as an end shield.

[第3の実施形態]
(構成)
 本実施形態の構成を、図7を参照して説明する。本実施形態は、基本的には、上記の第2の実施形態と同様の構成である。但し、本実施形態では、増設側Bの絶縁スペーサ4にも、既設側Aと同様の導体9、接続導体10が設けられている。増設時には、図8に示すように、着脱導体7と既設側Aの導体10をボルト締結等により接続し、もう一つの着脱導体7と増設側Bの導体10をボルト締結等により接続する。
[Third Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIG. This embodiment is basically the same configuration as the second embodiment. However, in the present embodiment, the insulating spacer 4 on the additional side B is also provided with the conductor 9 and the connecting conductor 10 similar to those on the existing side A. At the time of expansion, as shown in FIG. 8, the detachable conductor 7 and the existing side A conductor 10 are connected by bolt fastening or the like, and the other detachable conductor 7 and the additional side B conductor 10 are connected by bolt fastening or the like.

(作用効果)
 以上のような本実施形態は、上記の第1及び第2の実施形態と同様の作用効果が得られる。さらに、増設側Bの接続導体10を導体9に予め挿入しておくことで、増設作業時に、絶縁スペーサ4への導体挿入による衝撃荷重を加えずに接続を行うことが可能となる。また、絶縁スペーサ4から十分離れた位置でのボルト締結等の作業が可能となり、締結工具等により絶縁スペーサ4を傷つけることなく導体の締結が可能となる。
(Function and effect)
In the present embodiment as described above, the same effects as those in the first and second embodiments described above can be obtained. Furthermore, by inserting the connection conductor 10 on the extension side B into the conductor 9 in advance, it is possible to perform connection without applying an impact load due to the insertion of the conductor into the insulating spacer 4 during the extension work. Further, it is possible to perform a bolt fastening operation at a position sufficiently away from the insulating spacer 4, and the conductor can be fastened without damaging the insulating spacer 4 with a fastening tool or the like.

 従って、安全性を確保するために既設側Aの機器および増設側Bの機器の双方を減圧する必要がなくなる。つまり既設側Aの機器および増設側Bの機器に、定格ガス圧を封入した状態で、既設回線および増設回線の運転を停止することなく、増設作業を実施することが可能となる。さらに本実施形態では、増設側Bを既設の設備とすることもできる。つまり、隣接する2つの既設回線間の着脱作業においても、2つの既設回線を停止することなく、着脱作業を実施することが可能となる。 Therefore, it is not necessary to depressurize both the equipment on the existing side A and the equipment on the expansion side B in order to ensure safety. That is, it is possible to carry out the expansion work without stopping the operation of the existing line and the extension line in the state where the rated gas pressure is sealed in the equipment on the existing side A and the equipment on the extension side B. Further, in the present embodiment, the additional side B can be an existing facility. In other words, even in the attachment / detachment operation between two adjacent existing lines, the attachment / detachment operation can be performed without stopping the two existing lines.

[第4の実施形態]
(構成)
 本実施形態の構成を、図9を参照して説明する。本実施形態は、基本的には、上記の第1の実施形態と同様の構成である。但し、本実施形態では、既設側Aのエンドタンク31に替えて、ハンドホール35aを有するエンドタンク35とカバー40を取り付けた構成となっている。エンドタンク35は、金属製の容器である。エンドタンク35の一端にはフランジが形成され、絶縁スペーサ4にボルト締結等により取り付けられている。エンドタンク35の他端もフランジが形成され、カバー40により封止されている。
[Fourth Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIG. This embodiment is basically the same configuration as the first embodiment. However, in this embodiment, instead of the existing side A end tank 31, an end tank 35 having a hand hole 35a and a cover 40 are attached. The end tank 35 is a metal container. A flange is formed at one end of the end tank 35 and attached to the insulating spacer 4 by bolt fastening or the like. The other end of the end tank 35 is also formed with a flange and sealed with a cover 40.

 ハンドホール35aは、エンドタンク35の周面の一部に設けられた筒状の開口である。ハンドホール35aの開口は、作業者が手を挿入して作業を行うことができる大きさである。開口は、通常時には封止されている。 The hand hole 35 a is a cylindrical opening provided in a part of the peripheral surface of the end tank 35. The opening of the hand hole 35a is a size that allows an operator to insert a hand to perform work. The opening is normally sealed.

(増設作業)
 以上のような本実施形態の増設作業を、図9及び図10を参照して説明する。まず、増設側Bの絶縁スペーサ4に、着脱導体7および導体8をボルト締結等により取り付ける。その後、タンク35のカバー40を取り外し、タンク35と絶縁スペーサ4をボルト締結等で固定する。そして、作業者は、タンク35のハンドホール35aを開けて、開口を介して工具を用いた手作業により、着脱導体7と導体6をボルト締結等により接続する。
(Expansion work)
The extension work of this embodiment as described above will be described with reference to FIGS. First, the detachable conductor 7 and the conductor 8 are attached to the insulating spacer 4 on the extension side B by bolt fastening or the like. Thereafter, the cover 40 of the tank 35 is removed, and the tank 35 and the insulating spacer 4 are fixed by bolt fastening or the like. Then, the operator opens the hand hole 35a of the tank 35, and connects the detachable conductor 7 and the conductor 6 by bolting or the like by manual operation using a tool through the opening.

 予め導体8のみを絶縁スペーサ4に固定し、着脱導体7は、タンク35と絶縁スペーサ4をボルト締結等した後に、タンク35のハンドホール35aから入れて、導体6および導体8と着脱導体7とを、ボルト締結等により接続することも可能である。 Only the conductor 8 is fixed to the insulating spacer 4 in advance, and the detachable conductor 7 is inserted from the hand hole 35a of the tank 35 after the tank 35 and the insulating spacer 4 are bolted or the like, and the conductor 6, the conductor 8 and the detachable conductor 7 Can be connected by bolt fastening or the like.

 なお、図11に示すように、増設側Bも、上記の既設側Aと同様に、絶縁スペーサ4に導体2及び接続導体6をボルト締結等により接続し、さらに着脱導体7を介して、既設側Aと増設側Bの接続導体6をボルト締結等により接続することもできる。 In addition, as shown in FIG. 11, the extension side B is connected to the insulating spacer 4 with the conductor 2 and the connection conductor 6 by bolt fastening or the like, and is further connected to the existing side A via the detachable conductor 7 in the same manner as the above-described existing side A. The connection conductors 6 on the side A and the expansion side B can be connected by bolt fastening or the like.

(作用効果)
 以上のような本実施形態では、上記の第1の実施形態と同様の作用効果が得られる。さらに、本実施形態では、既設側Aの絶縁スペーサ1に、ハンドホール35aを有するタンク35が接続されている。このため、絶縁スペーサ1は、タンク30およびタンク35のフランジにより両側を挟みこまれるので、比較的機械強度が低くても高圧ガスによる差圧に耐えることができる。また、比較的機械強度が高い絶縁スペーサ1を用いた場合は、その破壊強度が更に向上する。
(Function and effect)
In the present embodiment as described above, the same effects as those of the first embodiment can be obtained. Further, in the present embodiment, a tank 35 having a hand hole 35 a is connected to the insulating spacer 1 on the existing side A. For this reason, since both sides of the insulating spacer 1 are sandwiched between the flanges of the tank 30 and the tank 35, the insulating spacer 1 can withstand the differential pressure due to the high-pressure gas even if the mechanical strength is relatively low. Further, when the insulating spacer 1 having a relatively high mechanical strength is used, the breaking strength is further improved.

 このように、既設側Aに予めハンドホール35aを有するタンク35をエンドタンクとして取り付けておくことにより、増設作業で不要となる部品を最小限にでき、既設側Aに定格ガス圧で絶縁性ガスを封入した状態で増設作業を実施することが可能となる。また、増設後に運転電圧での長時間耐電圧試験を実施することが可能となる。 In this way, by attaching the tank 35 having the hand hole 35a to the existing side A as an end tank in advance, it is possible to minimize the parts that are not required for the expansion work, and the insulating gas is supplied to the existing side A at the rated gas pressure. It becomes possible to carry out expansion work in a state of sealing. In addition, it is possible to perform a long-term withstand voltage test at the operating voltage after expansion.

 また、図11に示すように、着脱導体7と接続するための接続面62aおよび電界緩和機能および定格電流通電機能を有する導体6を導体2に予め挿入しておくことで、着脱導体7を取り外した際には、既設側Aおよび増設側Bの双方の現地耐電圧試験を実施することができる。つまり、機器を増設した後に、増設側Bでも通常の現地耐電圧試験を実施することも可能となる。また、増設側Bも、比較的機械強度が低い絶縁スペーサ4を用いても、差圧に耐えることができ、比較的機械強度が高い絶縁スペーサ4を用いた場合は、より高い安全性を確保することができる。 In addition, as shown in FIG. 11, the connecting surface 62 a for connecting to the detachable conductor 7 and the conductor 6 having an electric field relaxation function and a rated current energizing function are inserted in the conductor 2 in advance, so that the detachable conductor 7 is removed. In this case, it is possible to carry out a local withstand voltage test on both the existing side A and the extension side B. That is, it is possible to perform a normal local withstand voltage test on the expansion side B after the devices are expanded. Also, the expansion side B can withstand differential pressure even if the insulating spacer 4 with relatively low mechanical strength is used, and if the insulating spacer 4 with relatively high mechanical strength is used, higher safety is ensured. can do.

[第5の実施形態]
 本実施形態を、図12を参照して説明する。本実施形態は、基本的には、上記の第2の実施形態と同様の構成である。但し、本実施形態は、増設作業に、スライドベローズ36を用いる。スライドベローズ36は、金属製の一対の筒状体を有し、一方の筒状体が他方の筒状体に挿入され、スライドすることにより伸縮する装置であり、両端にフランジが設けられている。
[Fifth Embodiment]
This embodiment will be described with reference to FIG. This embodiment is basically the same configuration as the second embodiment. However, this embodiment uses the slide bellows 36 for the expansion work. The slide bellows 36 is a device that has a pair of metallic cylindrical bodies, one cylindrical body is inserted into the other cylindrical body, and expands and contracts by sliding, and flanges are provided at both ends. .

 まず、増設手順として、エンドタンク32とエンドシールド5aを取り外す。これにより生じた空間を利用してエンドタンク31を取り外す。その後、スライドベローズ36を圧縮した状態で、一端のフランジを既設側Aの絶縁スペーサ1にボルト締結等により取り付ける。次に、着脱導体7と導体10をボルト締結等により接続し、導体8を絶縁スペーサ4に取り付ける。最後に、着脱導体7と導体8とをボルト締結等により接続し、スライドベローズ36を伸張して、他方のフランジを増設側Bの絶縁スペーサ4にボルト締結等により取り付ける。 First, as an expansion procedure, the end tank 32 and the end shield 5a are removed. The end tank 31 is removed using the space generated thereby. Thereafter, with the slide bellows 36 compressed, a flange at one end is attached to the insulating spacer 1 on the existing side A by bolt fastening or the like. Next, the detachable conductor 7 and the conductor 10 are connected by bolt fastening or the like, and the conductor 8 is attached to the insulating spacer 4. Finally, the detachable conductor 7 and the conductor 8 are connected by bolt fastening or the like, the slide bellows 36 is extended, and the other flange is attached to the insulation spacer 4 on the extension side B by bolt fastening or the like.

 以上のような本実施形態では、スライドベローズ36を用いた構成によって、上記の第1及び第2の実施形態と同様の作用効果を得ることができる。 In the present embodiment as described above, the same effect as in the first and second embodiments can be obtained by the configuration using the slide bellows 36.

[第6の実施形態]
(構成)
 本実施形態の構成を、図13を用いて説明する。本実施形態は、基本的には、上記の第2及び第5の実施形態と同様の構成である。但し、既設側Aの絶縁スペーサ1とエンドタンク31との間にリング37が、ボルト締結等により取り付けられている。リング37は、例えば、絶縁スペーサ1及びエンドタンク31と略同径のドーナツ形状又はフランジ状の平板を用いることができる。但し、この形状には限定されない。なお、使用される絶縁スペーサ1は比較的機械強度が低いものであっても、高いものであってもよい。
[Sixth Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIG. This embodiment is basically the same configuration as the second and fifth embodiments described above. However, a ring 37 is attached between the insulating spacer 1 on the existing side A and the end tank 31 by bolt fastening or the like. For the ring 37, for example, a donut-shaped or flange-shaped flat plate having substantially the same diameter as the insulating spacer 1 and the end tank 31 can be used. However, it is not limited to this shape. The insulating spacer 1 used may have a relatively low mechanical strength or a high one.

(増設作業)
 以上のような本実施形態の増設作業を、図13及び図14を参照して説明する。まず、増設手順として、エンドタンク32とエンドシールド5を取り外す。これにより生じた空間を利用してエンドタンク31を取り外す。その後、スライドベローズ36を圧縮した状態で既設側Aに取り付け、次に、着脱導体7と導体10をボルト締結等により固定する。導体8を、絶縁スペーサ4にボルト締結等により接続する。最後に、着脱導体7と導体8をボルト締結等により接続し、スライドベローズ36を伸張し増設側Bの絶縁スペーサ4とボルト締結等により接続する。
(Expansion work)
The extension work of this embodiment as described above will be described with reference to FIGS. First, as an extension procedure, the end tank 32 and the end shield 5 are removed. The end tank 31 is removed using the space generated thereby. Thereafter, the slide bellows 36 is attached to the existing side A in a compressed state, and then the detachable conductor 7 and the conductor 10 are fixed by bolt fastening or the like. The conductor 8 is connected to the insulating spacer 4 by bolt fastening or the like. Finally, the detachable conductor 7 and the conductor 8 are connected by bolt fastening or the like, and the slide bellows 36 is extended and connected to the insulating spacer 4 on the additional side B by bolt fastening or the like.

(作用効果)
 以上のような本実施形態では、絶縁スペーサ1にリング37が取り付けられているので、絶縁スペーサ1は、タンク30のフランジおよびリング37により両側を挟みこまれている。このため、絶縁スペーサ1の破壊強度が向上するので、増設作業時のより高い安全性を確保できる。また、比較的機械強度が低くても高圧ガスによる差圧に耐えることが可能となる。さらに、比較的機械強度が高い絶縁スペーサを用いた場合は、その破壊強度が更に向上する。
(Function and effect)
In the present embodiment as described above, since the ring 37 is attached to the insulating spacer 1, both sides of the insulating spacer 1 are sandwiched between the flange of the tank 30 and the ring 37. For this reason, since the breaking strength of the insulating spacer 1 is improved, it is possible to secure higher safety during expansion work. Further, even if the mechanical strength is relatively low, it is possible to withstand the differential pressure due to the high-pressure gas. Further, when an insulating spacer having a relatively high mechanical strength is used, the breaking strength is further improved.

 このように、絶縁スペーサ1の両側を固定しているか、片側のみで固定しているかで差圧に対する機械強度に差が生じる原理を、以下に説明する。まず、図15に示すように、タンク30に絶縁スペーサ1を取付け、さらに絶縁スペーサ1をリング37によって、両側より締め付けた状態でガス圧力P、つまり絶縁スペーサ1にタンク30の内側から発生するガス圧力が加わった場合を考える。 The principle of the difference in the mechanical strength against the differential pressure depending on whether both sides of the insulating spacer 1 are fixed or only one side will be described below. First, as shown in FIG. 15, the insulating spacer 1 is attached to the tank 30, and further the gas pressure P generated in the insulating spacer 1 from the inside of the tank 30 in a state where the insulating spacer 1 is tightened from both sides by the ring 37. Consider the case where pressure is applied.

 絶縁スペーサ1はタンク30のフランジとリング37とで挟まれて固定されるため、絶縁スペーサ1はφAの両端の位置までフランジにより固定される。この状態で、絶縁スペーサ1に高圧のガス圧力Pが加わった場合、φAの両端の位置から変形が始まり、ひずみ量δ1だけ変形する。 Since the insulating spacer 1 is sandwiched and fixed between the flange of the tank 30 and the ring 37, the insulating spacer 1 is fixed to the positions of both ends of φA by the flange. In this state, when a high gas pressure P is applied to the insulating spacer 1, the deformation starts from the positions at both ends of φA and is deformed by the strain amount δ1.

 一方、図16に示すように、絶縁スペーサ1がタンク30のフランジにより片側のみ固定されている場合を考える。絶縁スペーサ1はタンク30のフランジとスタッドによりφCの両端の位置で固定される。この状態で絶縁スペーサ1にガス圧力Pが加えられた場合、φCの両端の位置から変形が始まり、ひずみ量δ2だけ変形する。 On the other hand, as shown in FIG. 16, the case where the insulating spacer 1 is fixed only on one side by the flange of the tank 30 is considered. The insulating spacer 1 is fixed at both ends of φC by the flange and the stud of the tank 30. When the gas pressure P is applied to the insulating spacer 1 in this state, the deformation starts from the positions at both ends of φC and is deformed by the strain amount δ2.

 ここで、絶縁スペーサ1の固定される位置はφC>φAであるから、変形量はδ2>δ1となり、その時発生する応力は、片側のみ固定した方が大きい。すなわち、絶縁スペーサ1を両側から固定した場合と比較し、片側のみ固定した方が、破壊強度が低くなり壊れやすい。 Here, since the position where the insulating spacer 1 is fixed is φC> φA, the amount of deformation is δ2> δ1, and the stress generated at that time is larger when only one side is fixed. That is, as compared with the case where the insulating spacer 1 is fixed from both sides, the one that is fixed only on one side has a lower breaking strength and is more likely to break.

 例えば、絶縁スペーサ1の機械強度が比較的高いものに関しては、片側のみフランジに固定した状態であっても、高圧ガスによる差圧に耐えることができる。しかし、絶縁スペーサ1の機械強度が比較的弱い場合、片側のみのフランジで固定しただけでは、高圧ガスによる差圧に耐えられないものも存在する。この場合、絶縁スペーサ1の両側をフランジ状の部材で挟み込んで固定することにより、既設側Aまたは増設側Bのタンク30またはタンク33のガス圧を減圧せずに、着脱装置の組立をするだけの機械強度向上が望める。 For example, when the insulating spacer 1 has a relatively high mechanical strength, it can withstand the differential pressure due to the high-pressure gas even when it is fixed to the flange only on one side. However, when the mechanical strength of the insulating spacer 1 is relatively weak, there are some that cannot withstand the differential pressure due to the high-pressure gas only by fixing with the flange on one side. In this case, the both sides of the insulating spacer 1 are sandwiched and fixed by flange-like members, so that only the assembly of the attaching / detaching device is performed without reducing the gas pressure in the tank 30 or the tank 33 on the existing side A or the extension side B. The mechanical strength can be improved.

[第7の実施形態]
(構成)
 本実施形態の構成を、図17を参照して説明する。本実施形態は、既設側Aの絶縁スペーサ1及び増設側Bの絶縁スペーサ4のフランジに、それぞれ第6の実施形態と同様のリング37を取り付けた以外は、上記の第3の実施形態と同様の構成である。ただし、使用される絶縁スペーサ1、4は比較的機械強度が低いものであっても、高いものであってもよい。
[Seventh Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIG. This embodiment is the same as the third embodiment described above except that the ring 37 similar to that of the sixth embodiment is attached to the flanges of the insulating spacer 1 on the existing side A and the insulating spacer 4 on the additional side B, respectively. It is the composition. However, the insulating spacers 1 and 4 used may have a relatively low mechanical strength or a high one.

(増設手順)
 以上のような本実施形態の増設手順を、図17及び図18を参照して説明する。まず、エンドタンク32を取り外す。これにより生じた空間を利用して、エンドタンク31を取り外す。その後、蛇腹ベローズ34を圧縮した状態で既設側Aに取り付け、次に、内部導体である着脱導体7と既設側Aの導体10をボルト締結等で接続する。そして、もう一つの内部導体である着脱導体7と増設側Bの導体10をボルト締結等で接続する。最後に、既設側Aの着脱導体7と増設側Bの着脱導体7をボルト締結等で接続し、蛇腹ベローズ34を伸張して、増設側Bの絶縁スペーサ4に取り付ける。
(Expansion procedure)
The extension procedure of the present embodiment as described above will be described with reference to FIGS. 17 and 18. First, the end tank 32 is removed. The end tank 31 is removed using the space generated thereby. Thereafter, the bellows bellows 34 is attached to the existing side A in a compressed state, and then the detachable conductor 7 which is an internal conductor and the conductor 10 on the existing side A are connected by bolt fastening or the like. Then, the removable conductor 7 which is another internal conductor and the conductor 10 on the additional side B are connected by bolt fastening or the like. Finally, the detachable conductor 7 on the existing side A and the detachable conductor 7 on the additional side B are connected by bolt fastening or the like, and the bellows bellows 34 is extended and attached to the insulating spacer 4 on the additional side B.

(作用効果)
 以上のような本実施形態では、エンドタンク31およびエンドタンク32を取り外した際、リング37が絶縁スペーサ1および絶縁スペーサ4に取り付けられているため、絶縁スペーサ1および絶縁スペーサ4の締結部分が、常に両側から挟みこまれている。このため、比較的機械強度が低い絶縁スペーサ1、4でも、高圧ガスによる差圧に耐えることが可能となる。従って、安全な回線間作業を実施することができる。また、比較的機械強度が高い絶縁スペーサ1、4を用いた場合は、その破壊強度が更に向上する。
(Function and effect)
In the present embodiment as described above, since the ring 37 is attached to the insulating spacer 1 and the insulating spacer 4 when the end tank 31 and the end tank 32 are removed, the fastening portions of the insulating spacer 1 and the insulating spacer 4 are Always sandwiched from both sides. For this reason, even the insulating spacers 1 and 4 having relatively low mechanical strength can withstand the differential pressure due to the high-pressure gas. Therefore, safe line-to-line work can be performed. Further, when the insulating spacers 1 and 4 having relatively high mechanical strength are used, the breaking strength is further improved.

[第8の実施形態]
(構成)
 本実施形態の構成を、図19及び図20を参照して説明する。本実施形態は、基本的には上記の第3の実施形態と同様の構成である。但し、絶縁スペーサ1には着脱装置の蛇腹ベローズ34の一端が接続されている。蛇腹ベローズ34の他端は、カバー40により封止されている。また、絶縁スペーサ4には、エンドタンク38の一端が接続され、他端がカバー40により封止されている。使用される絶縁スペーサ1、4は比較的機械強度が低いものであっても、高いものであってもよい。
[Eighth Embodiment]
(Constitution)
The configuration of this embodiment will be described with reference to FIGS. The present embodiment is basically the same configuration as the third embodiment. However, one end of a bellows bellows 34 of the attachment / detachment device is connected to the insulating spacer 1. The other end of the bellows bellows 34 is sealed with a cover 40. One end of an end tank 38 is connected to the insulating spacer 4 and the other end is sealed with a cover 40. The insulating spacers 1 and 4 used may have a relatively low mechanical strength or a high one.

(増設手順)
 以上のような本実施形態による増設作業を、図19及び図20を参照して説明する。まず、蛇腹ベローズ34のカバー40、エンドタンク38のカバー40を取り外す。そして、蛇腹ベローズ34を内部導体である着脱導体7が挿入できる程度に圧縮した状態とし、蛇腹ベローズ34とエンドタンク38との隙間から着脱導体7を入れて、着脱導体7と既設側Aの導体10をボルト締結等で接続する。また、もう一つの着脱導体7と増設側Bの導体10を、ボルト締結等で接続する。最後に、既設側Aの着脱導体7と増設側Bの着脱導体7をボルト締結等で接続し、蛇腹ベローズ34を伸張して、増設側Bのエンドタンク38に取り付ける。
(Expansion procedure)
The expansion work according to the present embodiment as described above will be described with reference to FIGS. 19 and 20. First, the cover 40 of the bellows bellows 34 and the cover 40 of the end tank 38 are removed. Then, the bellows bellows 34 is compressed to such an extent that the removable conductor 7 as the internal conductor can be inserted, and the removable conductor 7 is inserted from the gap between the bellows bellows 34 and the end tank 38, so that the removable conductor 7 and the existing side A conductor 10 is connected by bolt fastening or the like. Further, another detachable conductor 7 and the conductor 10 on the additional side B are connected by bolt fastening or the like. Finally, the detachable conductor 7 on the existing side A and the detachable conductor 7 on the additional side B are connected by bolting or the like, and the bellows bellows 34 is extended and attached to the end tank 38 on the additional side B.

(作用効果)
 以上のような本実施形態は、上記の第1および第2の実施形態と同様の作用効果が得られる。さらに、蛇腹ベローズ34およびエンドタンク38が、絶縁スペーサ1および絶縁スペーサ4に取り付けられていることにより、絶縁スペーサ1および絶縁スペーサ4の締結部分が、常にフランジ状の部材により両側から挟みこまれている。このため、比較的機械強度が低い絶縁スペーサ1、4でも、高圧ガスによる差圧に耐えることが可能となる。従って、より安全な回線間作業を実施することができる。また、比較的機械強度が高い絶縁スペーサ1、4を用いた場合は、その破壊強度が更に向上する。
(Function and effect)
In the present embodiment as described above, the same effects as those in the first and second embodiments described above can be obtained. Further, since the bellows bellows 34 and the end tank 38 are attached to the insulating spacer 1 and the insulating spacer 4, the fastening portions of the insulating spacer 1 and the insulating spacer 4 are always sandwiched from both sides by the flange-shaped member. Yes. For this reason, even the insulating spacers 1 and 4 having relatively low mechanical strength can withstand the differential pressure due to the high-pressure gas. Therefore, safer interline work can be performed. Further, when the insulating spacers 1 and 4 having relatively high mechanical strength are used, the breaking strength is further improved.

 また、蛇腹ベローズ34とタンク38を、切離し状態のエンドタンクとして使用することにより、一連の着脱作業に必要な部品点数を削減し、コスト低減にも寄与する。なお、既設側Aをタンク38、増設側Bを蛇腹ベローズ34としても、同様である。 In addition, by using the bellows bellows 34 and the tank 38 as separated end tanks, the number of parts required for a series of attaching and detaching operations is reduced, which contributes to cost reduction. The same applies when the existing side A is the tank 38 and the additional side B is the bellows bellows 34.

[他の実施形態]
 本明細書においては、本発明に係る複数の実施形態を説明したが、これらの実施形態は例として提示したものであって、発明の範囲を限定することを意図していない。具体的には、第1乃至第8の実施形態を全て又はいずれかを組み合わせたものも包含される。以上のような実施形態は、その他の様々な形態で実施されることが可能であり、発明の範囲を逸脱しない範囲で、種々の省略や置き換え、変更を行うことができる。これらの実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。
[Other Embodiments]
In the present specification, a plurality of embodiments according to the present invention have been described. However, these embodiments are presented as examples and are not intended to limit the scope of the invention. Specifically, a combination of all or any one of the first to eighth embodiments is also included. The above embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

 例えば、上記の実施形態では、単相のガス絶縁開閉装置に適用されていたが、3相一括で構成されたガス絶縁開閉装置にも適用可能である。この場合にも、上記の実施形態と同様の作用効果が得られる。 For example, in the above-described embodiment, it is applied to a single-phase gas-insulated switchgear, but it can also be applied to a gas-insulated switchgear configured in a three-phase package. Also in this case, the same effect as the above-described embodiment can be obtained.

1 絶縁スペーサ
2 導体
2a 穴
3 エンドシールド
4 絶縁スペーサ
5 導体
5a エンドシールド
6 接続導体
61 挿入部
62 エンドシールド
62a 接続面
7 着脱導体
8 導体
9 導体
9a 穴
9b 曲面部
10 導体
101 挿入部
102 接続面
11 接続導体
30 タンク
31 エンドタンク
32 エンドタンク
33 タンク
34 蛇腹ベローズ
35 エンドタンク
36 スライドベローズ
37 リング
38 エンドタンク
40 カバー
C 接点
DESCRIPTION OF SYMBOLS 1 Insulation spacer 2 Conductor 2a Hole 3 End shield 4 Insulation spacer 5 Conductor 5a End shield 6 Connection conductor 61 Insertion part 62 End shield 62a Connection surface 7 Detachable conductor 8 Conductor 9 Conductor 9a Hole 9b Curved surface part 10 Conductor 101 Insertion part 102 Connection surface 11 Connection conductor 30 Tank 31 End tank 32 End tank 33 Tank 34 Bellows bellows 35 End tank 36 Slide bellows 37 Ring 38 End tank 40 Cover C Contact

Claims (11)

 ガス絶縁開閉装置のタンクに接続されたガス区分用の絶縁スペーサと、
 前記絶縁スペーサに支持された導体と、
 前記導体に挿抜可能且つ電気的に接続され、前記導体と反対側に他の導体と接続可能な接続面を有する接続導体と、
 を有し、
 前記接続導体は、前記他の導体と接続している場合および前記他の導体と接続していない場合に電界緩和機能を有する着脱装置。
An insulating spacer for gas classification connected to the tank of the gas insulated switchgear;
A conductor supported by the insulating spacer;
A connecting conductor that is pluggable and electrically connected to the conductor and has a connecting surface that can be connected to another conductor on the opposite side of the conductor;
Have
The attachment / detachment device has an electric field relaxation function when the connection conductor is connected to the other conductor and is not connected to the other conductor.
 ガス絶縁開閉装置のタンクに接続されたガス区分用の絶縁スペーサと、
 前記絶縁スペーサに支持された導体と、
 前記導体に摺動可能且つ電気的に接続され、前記導体と反対側に他の導体と接続可能な接続面を有する接続導体と、
 を有し、
 前記接続導体は、
 前記導体の端部に形成された穴に挿入される接触子と、
 前記導体から露出したエンドシールドと、
 前記エンドシールドに形成され、前記接続面を構成する平坦面と、
を有する着脱装置。
An insulating spacer for gas classification connected to the tank of the gas insulated switchgear;
A conductor supported by the insulating spacer;
A connection conductor slidably and electrically connected to the conductor, and having a connection surface connectable to another conductor on the opposite side of the conductor;
Have
The connection conductor is
A contactor inserted into a hole formed at an end of the conductor;
An end shield exposed from the conductor;
A flat surface formed on the end shield and constituting the connection surface;
Detachable device having
 前記エンドシールドは、さらに前記導体の一部を含み構成されている請求項2記載の着脱装置。 The attachment / detachment device according to claim 2, wherein the end shield further includes a part of the conductor.  前記接続面には、前記他の導体を締結する締結具がねじ込まれるネジ穴が形成されている請求項1乃至3のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 3, wherein a screw hole into which a fastener for fastening the other conductor is screwed is formed on the connection surface.  前記接続導体は、外周に電界緩和のための曲面形状を有する請求項1乃至4のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 4, wherein the connection conductor has a curved shape for electric field relaxation on an outer periphery.  前記導体の端部は、外周に電界緩和のための曲面形状を有する請求項1乃至5のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 5, wherein an end portion of the conductor has a curved surface shape for electric field relaxation on an outer periphery.  前記絶縁スペーサにリングが取り付けられている請求項1乃至6のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 6, wherein a ring is attached to the insulating spacer.  前記絶縁スペーサには、蛇腹ベローズが取り付けられている請求項1乃至7のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 7, wherein a bellows bellows is attached to the insulating spacer.  前記絶縁スペーサには、ハンドホールを有するタンクが取り付けられている請求項1乃至8のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 8, wherein a tank having a hand hole is attached to the insulating spacer.  前絶縁スペーサには、スライドベローズが取り付けられている請求項1乃至9のいずれかに記載の着脱装置。 The attachment / detachment device according to any one of claims 1 to 9, wherein a slide bellows is attached to the front insulating spacer.  前記ガス絶縁開閉装置は、3相一括で構成されている請求項1乃至10のいずれかに記載の着脱装置。
 
The said gas insulated switchgear is the attachment / detachment apparatus in any one of Claims 1 thru | or 10 comprised by 3 phase package.
PCT/JP2017/004384 2017-02-07 2017-02-07 Connecting/disconnecting device Ceased WO2018146720A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115224655A (en) * 2022-08-09 2022-10-21 鼎圣集团有限公司 L-shaped reinforced end pin bus duct with adjustable angle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54173932U (en) * 1978-05-30 1979-12-08
JPS5561226A (en) * 1978-10-30 1980-05-08 Tokyo Shibaura Electric Co Enclosed bus line
JPS59159128U (en) * 1983-04-11 1984-10-25 株式会社東芝 Detachable busbar
JPH10271650A (en) * 1997-03-28 1998-10-09 Toshiba Corp Gas insulated switchgear
JP2002142340A (en) * 2000-11-06 2002-05-17 Toshiba Corp Gas insulated detachable bus device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54173932U (en) * 1978-05-30 1979-12-08
JPS5561226A (en) * 1978-10-30 1980-05-08 Tokyo Shibaura Electric Co Enclosed bus line
JPS59159128U (en) * 1983-04-11 1984-10-25 株式会社東芝 Detachable busbar
JPH10271650A (en) * 1997-03-28 1998-10-09 Toshiba Corp Gas insulated switchgear
JP2002142340A (en) * 2000-11-06 2002-05-17 Toshiba Corp Gas insulated detachable bus device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115224655A (en) * 2022-08-09 2022-10-21 鼎圣集团有限公司 L-shaped reinforced end pin bus duct with adjustable angle
CN115224655B (en) * 2022-08-09 2023-10-10 鼎圣集团有限公司 L-shaped reinforced end pin bus duct with adjustable angle

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