CN110444436B

CN110444436B - Grounding switch

Info

Publication number: CN110444436B
Application number: CN201910783985.2A
Authority: CN
Inventors: 张焕粉; 樊京生; 王华天; 孟凡锐
Original assignee: Beijing Qingchang Power Technology Co ltd
Current assignee: Beijing Qingchang Power Technology Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-26
Anticipated expiration: 2039-08-23
Also published as: CN110444436A

Abstract

An earthing switch comprising: the grounding switch comprises a contact component, a square rotating shaft, a mounting and fixing component and a driving component, wherein the contact component is used for being connected with a moving contact of the grounding switch to control the switching-on or grounding of the grounding switch, and is connected to the square rotating shaft; the four-direction rotating shaft is used for controlling the contact assembly to rotate; the mounting and fixing assembly is used for fixing the driving assembly and the square rotating shaft and is divided into two parts, wherein one part is used for fixing the driving assembly, and the other part is sleeved with the square rotating shaft which can rotate; the driving assembly is used for driving the square rotating shaft to rotate, the driving assembly provides rotating power for the square rotating shaft in a driving mode through the connecting rod, the driving assembly is fixed on the installation fixing assembly, and the driving assembly is sleeved with the square rotating shaft capable of rotating. The grounding switch of the invention is not limited by the driving component in use and has the advantage of no jamming.

Description

Grounding switch

Technical Field

The invention relates to the field of high-voltage switches, in particular to a grounding switch for power distribution switchgear.

Background

High voltage isolation/grounding switches are electrical components commonly used in high voltage power transmission and distribution systems. The high-voltage isolating switch is mainly used for disconnecting a circuit without load current during switching-off and reliably passing current during switching-on. The high-voltage grounding switch is used for grounding the loop so as to ensure the safety during maintenance. The switch can realize the closing of the isolating switch and the closing of the grounding switch by driving and rotating the operation main shaft.

The existing grounding switch has the condition that the switch-on is not in place or the switch-off is not in place; the speed of closing and the torque generated are limited by the operating mechanism; the earthing switch is easy to be affected by the surrounding environment to generate the problem of jamming, and the use of the earthing switch is affected.

Disclosure of Invention

In order to solve the problems that the grounding switch is not in place for switching on or switching off, the switching-on speed and the generated torque are limited by a driving mechanism and are easy to be affected by the surrounding environment to generate jam, the invention aims to provide the grounding switch, and the principle that a spring passes through a dead point is utilized to ensure that the grounding switch is in place for switching on and switching off; the driving mechanism for fast switching on is independent of the rotation of the rotating shaft, and the switching on and off speed and the generated torque are not limited by the operating mechanism; the insulating part is matched with the metal part, so that the jamming phenomenon is avoided, the grounding switch can flexibly rotate, and the grounding switch is not influenced by the external environment.

In order to achieve the purpose, the invention adopts the following technical scheme:

an earthing switch comprising: comprises a contact assembly, a square rotating shaft, a mounting and fixing assembly and a driving assembly,

the contact assembly is used for being connected with a moving contact of the grounding switch to control the switching-on or grounding of the grounding switch, and the contact assembly is connected to the square rotating shaft;

the four-direction rotating shaft rotates to drive the contact assembly to rotate;

the mounting and fixing assembly is used for fixing the driving assembly and the square rotating shaft and is divided into two parts, wherein one part is used for fixing the driving assembly, and the other part is sleeved with the square rotating shaft which can rotate;

the driving assembly is used for driving the four-direction rotating shaft to rotate, the driving assembly drives the four-direction rotating shaft to rotate in a connecting rod driving mode, the driving assembly is fixed on the installation fixing assembly, and the driving assembly is sleeved with the four-direction rotating shaft capable of rotating.

Wherein the drive assembly comprises: slider pin, slip chunk, perpendicular push rod, string spring board, string spring, crank connecting rod, turning arm and rocking arm, the one end of turning arm cup joints in four directions pivot one end, and the turning arm other end links to each other with crank connecting rod, the slip chunk passes through the slider pin and links to each other with the one end of erecting the push rod, and the other end of erecting the push rod links to each other with crank connecting rod, and the department of linking to each other sets up on the hanging spring board, be equipped with the string spring on the hanging spring board, the fixed subassembly of installation is connected to the one end of hanging the spring, it is spacing to the four directions pivot that drive assembly passes through the string spring, rocking arm one end is fixed on the fixed.

Wherein the contact assembly comprises: the contact comprises a contact and a contact clip, wherein one end of the contact is fixedly connected to the square rotating shaft, and the other end of the contact is fixedly connected with the contact clip.

Wherein, the installation fixing component comprises: the four-direction rotating shaft is characterized by comprising a frame plate, a mounting seat frame and a shaft frame, wherein two ends of the four-direction rotating shaft are respectively fixed on the frame plate and the shaft frame through brass sleeves, the shaft frame is fixed on the mounting seat frame, and the mounting seat frame and the frame plate are fixed in a switch box body for mounting the grounding switch.

The shaft bracket is provided with a through hole I, a hanging spring column I, a through hole II and a rotating shaft, the through hole I is connected with the square rotating shaft through a brass sleeve, the hanging spring is sleeved on the hanging spring column I, the shaft bracket is fixed on the mounting seat frame through the through hole II, a hanging spring plate on the driving assembly is fixed on the rotating shaft, and the hanging spring plate rotates around the shaft bracket through the rotating shaft.

The mounting seat frame is provided with a mounting hole for fixing the rotating arm and a long groove for enabling the sliding block to slide.

The hanging spring plate is provided with a through hole III, a limiting column, a hanging spring column II and a through hole IV, the through hole III is sleeved with a rotating shaft, the hanging spring column II is connected with one end of a hanging spring, the through hole IV is used for fixing a vertical push rod and a crank connecting rod, the shaft bracket is limited by the limiting protrusion, and the hanging spring plate is limited to rotate.

The three contacts are respectively corresponding to three phases, each contact is provided with a bending structure, so that the distance between the fixed ends of every two adjacent contacts is smaller than the distance between every two adjacent contact clamps, and the distances between every two adjacent contact clamps are equal.

Wherein the contact clip comprises: contact clamp I, vertical pin, split pin, commentaries on classics round pin, spring and contact clamp II, contact clamp I is fixed through changeing the round pin with II one ends of contact clamp, contact clamp I and contact clamp can revolute between II round pin switching, the spring sets up on the vertical pin that contact clamp I and contact clamp between II, it is spacing that the split pin is passed through at vertical pin both ends.

Wherein, the one end of keeping away from the contact clip on the contact is fixed with the flexible coupling, the flexible coupling is used for connecting high voltage circuit.

The technical scheme of the invention has the following beneficial technical effects:

1. the grounding switch utilizes the principle that a spring passes through a dead point, and ensures that the switching-on and switching-off of the grounding switch are in place;

2. the material of the square rotating shaft of the grounding switch is an insulating material, so that when the grounding switch is connected with a three-phase contact, the generation of interphase short circuit fault is effectively prevented, and the grounding switch is safer;

3. the contact structure of the grounding switch with the optimized design ensures that the grounding switch has certain contact pressure at the switching-on position or the grounding position, and the performance is more reliable;

4. the use of the flexible connection ensures that the grounding contact and the PT wire outlet end can still be reliably connected when the rotating shaft rotates to a closing or grounding position;

5. the grounding switch moves under the driving of the double-crank structure, and is flexible and reliable.

6. The earthing switch has a fast closing mechanism, the action of which is independent of the rotation of the rotating shaft, and the closing speed and the generated torque of the switch are not limited by the operating mechanism.

7. The earthing switch adopts the cooperation of insulating part and metalwork, has avoided the production of jam phenomenon, makes earthing switch nimble rotate to do not receive external environment's influence.

Drawings

Fig. 1 is an overall structural view of a ground switch;

FIG. 2 is a perspective view of a right side 45 degree angle of a grounding switch;

FIG. 3 is a left side 45 degree angle perspective view of a grounding switch;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a schematic view of the contact assembly of FIG. 1;

FIG. 6 is a schematic view of the pedestal of FIG. 1 rotated 180 degrees clockwise;

FIG. 7 is a schematic view of the hanger spring plate of FIG. 1 rotated 90 degrees counterclockwise;

FIG. 8 is a schematic view of the mounting bracket of FIG. 1;

FIG. 9 is a left side 135 degree angle perspective view of a grounding switch;

reference numerals:

1: a square rotating shaft; 2: a slider pin; 3: sliding the block; 4: a vertical push rod; 5: a spring hanging plate; 6: hanging a spring; 7: a crank connecting rod; 8: a crank arm; 9: a rotating arm; 10: a contact assembly; 11: a frame plate; 12: mounting a seat frame; 13: a pedestal; 14: installing a fixed component; 15: a drive assembly; 101: a contact; 102: soft connection; 103: a contact clip I; 104: a vertical pin; 105: a cotter pin; 106: rotating the pin; 107: spring, 108: a contact clip II; 121: mounting holes; 122: a long groove; 131: a through hole I; 132: a hanging spring column I; 133: a through hole II; 134: a rotating shaft; 135: a limiting bulge; 501: a through hole III; 502, a limiting column; 503: a hanging spring column II; 504: a through hole IV; 1011: a first contact; 1012: a second contact; 1013: and a third contact.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of this patent, it is to be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", "upper", "middle", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of this patent, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Like components in fig. 1 to 9 are denoted by like reference numerals, and components which are improved over the prior art will be described with or without simplicity in relation to existing components which do not relate to the improvement point of the present invention.

Referring to fig. 1-4, a schematic structure of a grounding switch includes: contact subassembly 10, drive assembly 15, four directions pivot 1, installation fixed subassembly 14, the contact subassembly is fixed on four

directions pivot

1, and 1 both ends of four directions pivot are fixed on installation fixed subassembly 14, drive assembly 15 includes: slider pin 2, slip chunk 3, perpendicular push rod 4, hanging spring board 5, string spring 6, crank link 7, turning arm 8 and rocking arm 9, turning arm 8 cup joints in 1 one end of four directions pivot, and the turning arm 8 other end links to each other with crank link 7, slip chunk 3 links to each other with the one end of erecting push rod 4 through slider pin 2, and the other end of erecting push rod 4 links to each other with crank link 7, and the department of linking to each other sets up on hanging spring board 5, be equipped with string spring 6 on the hanging spring board 5, the fixed subassembly 14 of installation is connected to the one end of hanging

spring

6, 9 one end of rocking arm are fixed on the fixed subassembly 14 of installation, and the other end links to each other with slip chunk 3.

As shown in fig. 3, the hanging spring 6 is not hung on the hanging spring plate 5, the vertical push rod is not connected with the crank connecting rod, the flexible connection and the vertical pin are not shown, and the position of the sliding block 5 is shown under the two conditions of closing and grounding of the grounding switch.

Referring to fig. 5, the contact assembly 10 includes: the contact device comprises a contact 101 and a contact clip, wherein one end of the contact 101 is fixedly connected to the four-direction rotating shaft 1, and the other end of the contact 101 is fixedly connected with the contact clip.

The contact clip includes: contact clip I103, vertical pin 104, split pin 105, commentaries on classics round pin 106, spring 107 and contact clip II 108, contact clip I103 and contact clip II 108 one end are fixed through commentaries on classics round pin 106, can open and shut around round pin 106 between contact clip I103 and the contact clip II 108, spring 107 sets up on the vertical pin 104 between contact clip I103 and the contact clip II 108, it is spacing that vertical pin 104 both ends pass through split pin 105.

The end of the contact 101 remote from the contact clip is fixed with a flexible connection for connecting a high voltage circuit.

The mounting fixture assembly 14 includes: the four-direction rotating shaft comprises a frame plate 11, a mounting seat frame 12 and a shaft frame 13, wherein two ends of the four-direction rotating shaft 1 are respectively fixed on the frame plate 11 and the shaft frame 13 through brass sleeves (not marked in the figure), the shaft frame 13 is fixed on the mounting seat frame 12, and the mounting seat frame 12 and the frame plate 11 are fixed in a switch box body of a grounding switch.

Referring to fig. 6, a through hole i 131, a hanging spring column i 132, a through hole ii 133 and a rotating shaft 134 are arranged on a shaft bracket 13, the through hole i 131 is connected with a square rotating shaft 1 through a brass sleeve, the hanging spring 6 is sleeved on the hanging spring column i 132, the shaft bracket 13 is fixed on an installation seat frame 12 through an upper through hole ii 133 and a lower through hole ii 133, the hanging spring plate 5 is fixed on the rotating shaft 134, the hanging spring plate 5 rotates around the shaft bracket 13 through the rotating shaft 134, and a hole of the through hole i 131 is used for fixing a contact clamp ii 108 of the square rotating shaft 1 and is installed concentrically with a shaft hole.

Referring to fig. 8 and 9, the mounting seat frame 12 is provided with a mounting hole 121 for fixing the rotating arm 9 and a long groove 122, and the long groove 122 is provided with a sliding block 3 sliding along the long groove 122.

For the sake of clarity of the relationship between the tumbler and the sliding block, the position of the sliding block 5 is shown in fig. 8, both in the case of the earthing switch being closed and in the case of earthing.

Referring to fig. 7, a through hole iii 501, a limiting column 502, a hanging spring column ii 503 and a through hole iv 504 are arranged on the hanging spring plate 5, the through hole iii 501 is sleeved with the rotating shaft 134, the hanging spring 6 is sleeved on the hanging spring column ii 503, the through hole iv 504 is used for fixing the vertical push rod 4 and the crank connecting rod 7, and the shaft bracket 13 limits the hanging spring plate 5 through the limiting column 502.

The shaft bracket 13 is provided with a semicircular limiting bulge 135, and the limiting bulge 135 limits the limiting column 502 so as to limit the rotation of the hanging spring plate 5.

Contact 101 has adopted the heterotypic contact structural design who guarantees three-phase ground conductor electric clearance and creepage distance requirement, contact 101 includes: the contact structure comprises a first contact 1011, a second contact 1012 and a third contact 1013, wherein the first contact 1011, the second contact 1012 and the third contact 1013 are bent at a certain angle, the middle part of the first contact 1011 is bent, the bottom part of the second contact 1012 is bent, the upper part of the third contact 1013 is bent, and the top distances between the bent first contact 1011 and the second contact 1012 and between the bent second contact 1012 and the third contact 1013 are the same.

The square rotating shaft 1 is made of an insulating material, and the contact 101 rotates around the square rotating shaft 1 under the combined action of the vertical push rod 4 and the crank connecting rod 7 structure, so that the grounding switch is in a switching-on state or a grounding state.

The working mode comprises the following steps: and switching on and grounding.

The working mode is grounded:

the rotating arm 9 rotates clockwise around the mounting hole 121 on the mounting seat frame 12, and the rotating arm 9 drives the sliding block 3 to slide downwards along the long groove 122 on the mounting seat frame 12; the sliding block 3 drives the vertical push rod 4 to move up and down, the vertical push rod 4 pulls the spring hanging plate 5 to rotate anticlockwise, the spring hanging plate 5 drives the crank connecting rod 7 to pull the crank arm 8 to rotate anticlockwise, and the crank arm 8 drives the contact 101 and the contact assembly 10 to rotate to reach a connection position. The limiting protrusion 135 limits the limiting column 502 on the hanging spring plate 5, the hanging spring plate 5 is limited to continue rotating, the hanging spring 6 assembled on the hanging spring column II 503 and the hanging spring column I132 passes through a dead point, the dead point is that the hanging spring 6 cannot drive the hanging spring plate to continue rotating, and the contact 101 is kept at a grounding position.

Switching on in a working mode:

contrary to the grounding mode, the rotating arm 9 rotates counterclockwise around the mounting hole 121 on the mounting seat frame 12, and the rotating arm 9 drives the sliding block 3 to slide upwards along the long groove 122 on the mounting seat frame 12; the sliding block 3 pushes the hanging spring plate 5 to rotate clockwise through the vertical push rod 4, the hanging spring plate 5 pulls the crank arm 8 to rotate clockwise through the crank connecting rod 7, and the crank arm 8 drives the contact 101 and the contact assembly 10 to rotate to reach a switching-on position. The hanging spring 6 assembled on the hanging spring column II 503 and the hanging spring column I132 passes through the dead point, so that the contact 101 is kept at the closing position.

The special-shaped contact 101 structure design which can guarantee the electric clearance and creepage distance requirements of the three-phase grounding conductor is adopted, so that certain contact pressure is guaranteed when the grounding switch is at a switch-on position or a grounding position, and the performance is more reliable.

The use of the flexible connection 102 ensures that the grounding contact 101 and the PT outlet terminal can still be reliably connected when the four-direction rotating shaft 1 rotates to a closing or grounding position.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A grounding switch is characterized by comprising a contact assembly (10), a four-direction rotating shaft (1), a mounting and fixing assembly (14) and a driving assembly (15),

the contact assembly (10) is used for being connected with a moving contact of a grounding switch to control the switching-on or grounding of the grounding switch, and the contact assembly (10) is connected to the four-direction rotating shaft;

the square rotating shaft (1) rotates to drive the contact assembly to rotate;

the mounting and fixing component (14) is used for fixing the driving component (15) and the square rotating shaft (1), the mounting and fixing component (14) is divided into two parts, one part is used for fixing the driving component (15), and the other part is sleeved with the square rotating shaft (1) which can rotate;

the driving assembly (15) is used for driving the square rotating shaft (1) to rotate, the driving assembly (15) drives the square rotating shaft (1) to rotate in a connecting rod driving mode, the driving assembly (15) is fixed on the installation fixing assembly (14), and the driving assembly (15) is sleeved with the square rotating shaft (1) which can rotate;

the drive assembly (15) comprises: a slide block pin (2), a slide block (3), a vertical push rod (4), a spring hanging plate (5), a spring hanging (6), a crank connecting rod (7), a crank arm (8) and a rotating arm (9), one end of the crank arm (8) is sleeved at one end of the square rotating shaft (1), the other end of the crank arm (8) is connected with the crank connecting rod (7), the sliding block (3) is connected with one end of a vertical push rod (4) through a slide block pin (2), the other end of the vertical push rod (4) is connected with a crank connecting rod (7), the connection part is arranged on a spring hanging plate (5), a hanging spring (6) is arranged on the hanging spring plate (5), one end of the hanging spring (6) is connected with a mounting and fixing component (14), the driving component (15) limits the square rotating shaft (1) through the hanging spring (6), one end of the rotating arm (9) is fixed on the mounting and fixing component (14), and the other end of the rotating arm is connected with the sliding block (3).

2. An earthing switch according to claim 1, characterized in that said contact assembly (10) comprises: the contact structure comprises a contact (101) and a contact clip, wherein one end of the contact (101) is fixedly connected to the square rotating shaft (1), and the other end of the contact (101) is fixedly connected with the contact clip.

3. An earthing switch according to claim 1, characterized in that said mounting fixture assembly (14) comprises: frame plate (11), mount pad frame (12) and pedestal (13), four directions pivot (1) both ends are fixed respectively on frame plate (11) and pedestal (13) through the brass bushing, pedestal (13) are fixed on mount pad frame (12), mount pad frame (12) and frame plate (11) are fixed in the switch box of installation earthing switch.

4. The grounding switch according to claim 3, wherein the shaft bracket (13) is provided with a through hole I (131), a hanging spring column I (132), a through hole II (133), a limiting protrusion (135) and a rotating shaft (134), the through hole I (131) is connected with the square rotating shaft (1) through a brass sleeve, the hanging spring (6) is sleeved on the hanging spring column I (132), the shaft bracket (13) is fixed on the mounting seat frame (12) through the through hole II (133), the hanging spring plate (5) on the driving assembly (15) is fixed on the rotating shaft (134), and the hanging spring plate (5) rotates around the shaft bracket (13) through the rotating shaft (134).

5. An earthing switch according to claim 3, characterized in that the mounting bracket (12) is provided with a mounting hole (121) for fixing the rotating arm (9) and an elongated slot for sliding the sliding block (3).

6. The grounding switch according to claim 4, wherein a through hole III (501), a limiting column (502), a hanging spring column II (503) and a through hole IV (504) are arranged on the hanging spring plate (5), the through hole III (501) is sleeved with the rotating shaft (134), the hanging spring column II (503) is connected with one end of the hanging spring (6), the through hole IV (504) is used for fixing the vertical push rod (4) and the crank connecting rod (7), and the shaft bracket (13) and the limiting protrusion (135) limit the limiting column (502) so as to limit the rotation of the hanging spring plate (5).

7. A earthing switch according to claim 2, characterized in that said contacts (101) are provided in three, corresponding to three phases, each contact (101) being provided with a bent structure such that the distance between the fixed ends of two adjacent contacts is smaller than the distance between the contact clamps of two adjacent contacts, and the distances between the contact clamps of two adjacent contacts are equal.

8. The grounding switch of claim 2, wherein said contact clip comprises: contact clamp I (103), vertical pin (104), split pin (105), commentaries on classics round pin (106), spring (107) and contact clamp II (108), contact clamp I (103) and contact clamp II (108) one end are fixed through commentaries on classics round pin (106), the contact clamp can open and shut around commentaries on classics round pin (106) between II (108) with the contact clamp I (103), spring (107) set up on vertical pin (104) between contact clamp I (103) and contact clamp II (108), vertical pin (104) both ends are spacing through split pin (105).

9. An earthing switch according to claim 2, characterized in that a flexible connection is fixed to the contact (101) at the end remote from the contact clamp, said flexible connection being used for connecting a high-voltage circuit.