KR101966602B1 - Insulated housing type interlocking disconnector and vacuum valve - Google Patents

Abstract

The present invention relates to an insulating housing interlocked with a disconnecting part, which reduces the impact load generated during driving through the individual operation of the disconnecting part and the vacuum valve and removes a spring corresponding to the autism force in the vacuum state to save energy. The disconnection unit and the vacuum valve interlock type insulation housing. When the switch and the breaker using the insulation housing are put in, the disconnecting unit is put in first and then the vacuum valve is put in later. After that, the special structure in which the disconnecting part is opened is driven individually, so that no electrical and mechanical shock is applied to the contacting part of the disconnecting part at the time of closing or opening. With a configuration that prevents mechanical impact of disconnection By eliminating the spring to prevent autism of the valve and miniaturizing it using only a simple spring slide contact instead of a contact such as a complicated tublip contact, the disconnecting unit and the vacuum valve are linked to each other in one operation and can be driven automatically. To maximize the efficiency of.

Description

Insulating housing with disconnection part and vacuum valve {INSULATED HOUSING TYPE INTERLOCKING DISCONNECTOR AND VACUUM VALVE}

The present invention relates to an insulating housing interlocked with a disconnecting part, which reduces the impact load generated during driving through the individual operation of the disconnecting part and the vacuum valve and removes a spring corresponding to the autism force in the vacuum state to save energy. It relates to a disconnecting unit and a vacuum valve interlocking insulating housing.

In general, an insulating housing having a vacuum valve (blocking part) is used for a power switch or a circuit breaker insulated using a polymer (epoxy). Since a vacuum circuit breaker can cut a large current in a small structure, it is frequently used in substations and distribution facilities, and the part of the valve body of the vacuum circuit breaker is fixed to the end surface of the conducting conductor in an insulating container such as ceramics to maintain a vacuum state. The electrode and the movable electrode fixed to the end surface of a conducting conductor similarly are comprised. This valve body is used as a vacuum circuit breaker by arranging it in the air | atmosphere or an insulated gas atmosphere, and providing the actuator which drives a movable electrode in the vicinity of a valve body. The vacuum circuit breaker, which is one of the circuit breakers as described above, is capable of quickly disconnecting a circuit by extinguishing arcs generated during normal load switching and breaking of an accident current in a vacuum container. It is widely used in substations and distribution facilities, and recently, vacuum breakers, which are most frequently used among medium voltage class breakers, have been commercialized in the 1960s by using the advantage of having high dielectric strength under vacuum of 10-3 Torr or less. Significant progress has been made in high voltage, high current and miniaturization. Switchgear and (vacuum) circuit breakers, which are the key components of switchgear and (vacuum) circuit breakers, are provided with a movable electrode and a fixed electrode, each having a well-closed insulated container and a contact point in contact with each other in the insulated container to maintain a vacuum. The movable electrode fixed to the end face is configured to face each other.

In more detail, in such a switch and a (vacuum) breaker, load switching and fault current interruption are performed in a vacuum state in the switch and the (vacuum) breaker, but the external insulation of the switch and the (vacuum) breaker is made in various media. Like vacuum circuit breaker (VCB), switchgear and (vacuum) breaker can be insulated in the air.OcB (OCB: oil circuit breaker) can be insulated in insulating oil and switch and (vacuum) breaker can be insulated. Insulation can be achieved using SF6 gas, like a high pressure switch.

However, these insulation methods have various problems. Air insulation methods such as VCC cannot be used where high impact voltage is required because of the low dielectric strength of air. In addition, the use of oil insulation such as OCB is rarely used recently because of the risk of oil explosion. Finally, SF6 gas, such as a high-pressure switch, is used where high impact voltage is required and there is no risk of explosion, but it is increasingly regulated in the environmental aspects of ozone layer destruction.

 As a result, the breakers and switchgear used in most of the current circuit breakers utilize vacuum valves, but the vacuum valves used in the prior art have excellent breaking performance and excellent insulation performance in a short distance. The opening distance (stroke) is so close that many changes in insulation performance occur according to the conditions of use, and there may be residual voltage on the secondary line even after opening, and the vacuum valve is vacuumed to maintain insulation at short distances. The inside is made, and in order to flow the current, it must be pushed under a certain amount of load to reach the electrodes and have electrical characteristics.

 Therefore, even if the switch is opened, many accidents have recently occurred due to abnormal voltage or insulation deterioration during the maintenance work of the rear stage.

In addition, some prior art has developed and used a device that can overcome the repulsive force of the vacuum by using an energy accumulating device such as an expansion spring in order to overcome the repulsive force caused by the vacuum, and the disconnection unit interlock type filed in May 2017 The prior art of the insulating housing has developed the technology related to the insulation housing of the disconnection part for improving the insulation performance and the user's safety in using the switch and the circuit breaker using the vacuum valve. The vacuum valve is installed in the vacuum valve and the lower portion of the vacuum valve is provided with a disconnecting part fixed electrode provided in the lower portion of the vacuum valve, and the lower part of the fixed electrode fixed electrode with a stud bolt fixed to the vacuum valve And a tubular contactor to open the vacuum valve and a vacuum valve under the tubular contactor. And a sliding contactor which is installed to slide up and down and slides up and down, and a sliding contactor which is installed at the center of the disconnectable movable electrode and allows a current to flow while sliding from the secondary conductor to the disconnecting movable electrode. However, since the spring is used to maintain the normally open state, which is the repulsion force generated when the vacuum valve is inserted, there is a problem in that the normally open spring must be installed, which causes the repulsive force to be required for driving and requires more force than necessary. The mechanical impact load between the disconnecting electrode and the tubular contact does not solve the problem of deforming the mechanical parts.

Republic of Korea Patent Publication No. 10-1898002 (2018. 09. 06),

Therefore, the present invention has been devised to solve the above problems, the interval between the electrodes of the vacuum valve 210 is generally 10 ~ 17mm and the interval between the electrodes is short, open in a short gap structure between the two electrodes, which is a characteristic of the vacuum valve even in the open state In addition to preventing the problem of the inter-pole insulation breakdown due to the charge is induced to the opposite pole due to factors such as external surge or dejection, as well as the vacuum valve insulation rod (210) in addition to the disconnecting portion insulation rod (300) By additionally configuring to provide a double insulating rod and to provide a structure capable of driving each of the two insulating rods individually to save energy required at all times and to prevent physical deformation of the electrode due to mechanical impact.

 In addition, the distance between the electrodes in the disconnecting unit and the vacuum valve is designated to maintain an insulation gap more than a certain amount to prevent voltage induced between the two poles, but the insulation gap above the predetermined amount is less than 50mm to mitigate mechanical shock caused by the injection and autism In order to not only overcome the force, but also to reduce the energy generated when the input is to provide a structure that can drive the vacuum valve insulating rod 217 in the cylindrical disconnection contact 340.

  In addition, in the case of using the vacuum valve 210 only in the existing art, a vacuum is generated to extinguish an arc generated when the movable electrode 212 and the fixed electrode 211 in the vacuum valve 210 are inserted or opened in a short time. When the valve 210 is inserted, a contact pressure of 60 kgf to 400 kgf using a spring is required for the movable electrode 212 of the vacuum valve 210 to smoothly conduct current between the movable electrode 212 and the fixed electrode 211. In the case of the configuration, the energy is greater than the sum of the force generated in the spring to prevent contact force to maintain the contact pressure on the movable electrode 212 and the spring to close the vacuum valve autism after the vacuum valve is inserted. Should be generated. Therefore, after the primary shock is applied to the vacuum valve movable electrode 212 through the determined operating distance of the disconnecting unit, an impact between the contacts in the secondary vacuum valve occurs. In particular, the disconnecting electrode made of copper by mechanical shock deforms according to several uses. This causes a decrease in contact efficiency of the electrode and causes mechanical failure due to insulation breakdown or component deformation. For this reason, in the present invention, in order to alleviate the force and impact required during the operation of the disconnecting unit 300 and the vacuum valve 210, the insulating unit contact 340 made of two cylindrical rods is slid to operate the vacuum valve. In order to contact the electrode adapter 216 and the vacuum valve insulating rod 217 is operated in the cylindrical disconnecting unit 300 to be directly transmitted to the movable electrode 212 of the vacuum valve, the vacuum valve insulating rod 217 at the time of opening. Because it is open by using the spring slide contact (320,330) instead of the complicated tubule connector without using a spring for maintaining the autism force, it is possible to simply configure the disconnecting unit 300 and the vacuum valve 210 in a straight line in accordance with the cylindrical structure The device can be minimized. In addition, the driving of the disconnecting unit 300 and the vacuum valve 210 are separately operated so as to eliminate the shock generated by operating at a predetermined insulation interval of the disconnecting unit 300 and to minimize the overall energy including the autism force. It was configured to.

 In addition, to prevent creepage discharge and leakage current that may occur due to the voltage applied to the electrode close to the earth, the lower portion of the cylindrical disconnection unit contact portion 340 is formed in the rib shape 350 to secure the creepage distance as much as possible. Configured.

The structure and driving method of the present invention for achieving the above object in the insulating housing 100 consisting of a disconnecting unit 300 and a vacuum valve 210 to cut off electricity,

The vacuum valve 210 is composed of a fixed electrode 211 and a movable electrode 212 therein,

The vacuum valve movable electrode 212 and the electricity supply adapter 216 and the vacuum valve insulating rod 217 is configured to be connected,

The vacuum valve insulating rod 217 and the adapter 216 may be connected to the disconnecting contact 340 having a cylindrical shape connected to the insulating part insulating rod 350 so as to contact the adapter 216 with the inner and outer sliding contacts 320 and 330. So you can wrap around and move around,

The adapter 216 is connected to the movable electrode 212 in the vacuum valve 210,

The disconnecting part fixed electrode 310 is intended to solve the problem by configuring the disconnecting part and the vacuum valve interlocking insulating housing, which are made of a structure connected to the secondary side conductor.

When the switch and the circuit breaker using the insulating housing of the present invention as described above, the disconnecting unit is introduced first and then the vacuum valve is introduced later, and the vacuum valve is opened first and then the disconnecting unit is opened. The special structure of the type that is connected to each other is driven individually, so that electrical and mechanical shocks are not applied to the contact points of the disconnection unit during closing or opening. In addition to the non-impact configuration, the spring for preventing autism of the vacuum valve is removed and the spring contact is simplified by using only a simple spring slide contact instead of a contact such as a complicated tubing contact. Can be driven automatically in conjunction This has the effect of maximizing the efficiency of the drive.

1 is a conventional insulating housing configuration
2 is a block diagram of the open housing including the insulating housing of the present invention
3 is a schematic view of opening the present invention
4 is a configuration diagram when only the cylindrical disconnection unit of the present invention
5 is a schematic view of the input of the present invention
6 is a configuration diagram when the input including the insulating housing of the present invention
7 is a driving diagram of the vacuum valve after the disconnection of the present invention
8 is a vacuum valve operation configuration of the present invention
Figure 9 Spring slide contact configuration diagram of the present invention

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

 In the drawings, the embodiments of the present invention are not limited to the specific forms shown, but are exaggerated for clarity. Although specific terms have been used herein, they are used for the purpose of describing the present invention and are not intended to limit the scope of the present invention as defined in the meaning or the claims.

 The expression 'and / or' is used herein to mean at least one of the components listed before and after.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described in detail as follows.

The insulating housing main body 100 surrounds the vacuum valve 210 and the disconnecting unit 300, and is made of epoxy to insulate the vacuum valve 210 and the disconnecting unit 300.

 The vacuum valve 210 has a vacuum valve 210 formed of a vacuum inside the vacuum cut-off device and a primary side conductor (200) installed on an upper portion of the vacuum valve 210 so as to conduct electricity flowing to the primary side. And a primary side voltage sensor 230 installed at the primary side conductor 220 to measure the voltage of the primary side. At this time, the small cylinder 214 of the vacuum valve is made of an insulating material excellent in high temperature and mechanical properties, and generally use a ceramic or the like that can be used at high temperatures.

 In addition, the surface of the vacuum valve 210 is configured to be provided with a silicon rubber 215 to protect the vacuum valve 210 during epoxy molding.

 In addition, in the open state of the vacuum valve 210, the cylindrical disconnection unit contact 340 is connected to the disconnecting unit fixed electrode 310 and the secondary conductor and is in mechanical contact with the internal vacuum valve insulating rod 217. When the vacuum valve 210 is to be insulated, the cylindrical disconnection contact 340 is sufficiently raised to the adapter 216 connected to the vacuum valve movable electrode 212 to be brought into contact with the guide 370. After the insertion is sufficiently inserted as shown in A of FIG. 7, the vacuum valve 210 is operated by raising the vacuum valve insulation rod 217 of about 10-17 mm (usually 12 mm) as shown in B of FIG. 7. The electrode 212 is driven and the movable electrode 212 is configured to contact the fixed electrode 211 in the vacuum valve 210.

Hereinafter, driving will be described with reference to the accompanying drawings, preferred embodiments of the present invention.

The vacuum valve 210 installed on the upper side of the insulating housing main body 100 and the disconnecting unit 300 installed on the lower portion of the vacuum valve may be driven independently of each other, and the cylindrical disconnecting unit contact 340 may be connected to each other. The disconnecting part fixed electrode 310 connected to the cylindrical disconnecting part contact 340 which is a movable contact with the movable electrode 212 and the fixed electrode 211 in the vacuum valve 210 being opened, respectively, has an outer spring sliding contact ( 320 is sufficiently inserted to contact the adapter 216 connected to the movable electrode 212 of the vacuum valve by being moved upward while being in contact with the secondary side conductor and into the cylindrical disconnection unit contact 340. The enclosed vacuum valve insulating rod 217 moves upward to move the movable electrode 212 in the vacuum valve 210 to be in contact with the fixed electrode 211, and the vacuum valve 210 and the disconnecting part insulating rod 350. For each individual drive of In detail using the plane 7, the spring-loading lever 700 moves the disconnecting part movable shaft from the point A to the point B by an external electric motor, and when the disconnecting part movable shaft reaches the point B, it is automatically And the vacuum valve movable lever 800 at point C moves to the point D to drive the vacuum valve movable shaft to drive the vacuum valve insulating rod 217 upward, and to operate the vacuum valve connected to the vacuum valve insulating rod 217. The electrode 212 is moved upward and in contact with the fixed electrode 211 of the vacuum valve is configured to conduct the current.

As described above, although the disconnecting unit fixed electrode 310, the cylindrical disconnecting unit contact 340, and the vacuum valve insulating rod 217 are in contact with each other, the vacuum valve insulating rod 217 is connected to the disconnecting unit so as to maintain an electrically insulated state. By using in parallel with the insulating rod 350 was configured to solve the problems of the structure and the mechanical shock and electrode transition using a spring to overcome the existing autism.

The process of opening in the injected state is opposite to the process of injecting in the open state. The vacuum valve movable electrode 212 moves downward while the fixed electrode 211 and the movable electrode 212 in the vacuum valve 210 are in contact with each other. When the spring axis lever 700 moves the disconnecting unit movable shaft from the point B to the point A by an external electric motor, the vacuum valve operating lever 800 moves the vacuum valve movable shaft at the point D by the spring energy accumulated during the movement. It moves quickly to point C, and the vacuum valve insulation rod moves to open the movable electrode of the vacuum valve. At this time, the vacuum valve actuating lever and the disconnecting unit actuating lever interlock through the external mechanism to prevent simultaneous operation. After the disconnecting lever is returned to the point A, the disconnecting contact 340 can be moved to an open state by a separate spring. It is constructed in a structure.

 That is, the vacuum valve movable lever moves rapidly from point D to point C due to the spring energy accumulated by moving the disconnecting part moving shaft from point B to point A, and then moving the disconnecting part moving shaft to the point A. The sub contact moves to the open position. Due to the mechanism structure, the spring shaft lever and the disconnecting unit movable shaft move from A to B at the same time, and then the vacuum valve actuating shaft is operated by the interlocking operation of the vacuum valve operating lever. Regardless of the shaft lever, the spring shaft lever is moved from B to A and the vacuum valve is first opened by the accumulated energy, and then the disconnection contact 304 is opened by a separate external spring.

 Opening the vacuum valve first when opening as described above is to be able to handle arcs and discharges such as arcs and discharges that may occur during opening in the vacuum valve.

 In addition, by applying the disconnection moving contact in a cylindrical shape, the vacuum valve insulating rod 217 operating in the cylinder may operate smoothly as the cylindrical disconnecting contact 340 and the cylindrical insulating part insulating rod 350 serve as a guide. Insulation housing is simplified, and in case of using existing tubip contact, when the rod disconnection conductor is inserted into the tubip contact, the inner jaw of the tubip contact is caught by the rod disconnection conductor and the vacuum valve In this case, due to the soft mechanical properties of the two contacts made of copper and the fast moving speed for arc arcing, deformation may occur in the inner jaw of the tubular contact, which is unsuitable for power transmission. By sliding with sliding spring contact during power transmission Since there is no mechanical impact necessary to insert and open the vacuum valve, it is possible to prevent the shape change caused by the impact of the disconnection part and the vacuum valve contact point and the electrode and the mechanical malfunction accordingly, thereby ensuring durability.

 The electrode spacing between the fixed electrode 211 and the movable electrode 212 of the vacuum valve currently being used is specified to be 10 ~ 17mm, and as a result of induction voltage, external surge, and thunderstorm, etc. In order to prevent the risk of dielectric breakdown, the distance between the disconnection part contact point and the vacuum valve movable electrode 212 is specified to be separated by a predetermined distance or more, and the distance over the predetermined distance (50 mm) is required when operating with one rod. The present invention is to induce a mechanical shock at the time of the force and input, causing a mechanical malfunction through the deformation of the electrode, the present invention adopts a separate interlocking drive method as described above for the operation of the disconnecting unit and the vacuum valve and the vacuum valve insulating rod 217 Is in mechanical contact, but by adopting a structure that directly drives electrical insulation and the vacuum valve movable lever, To minimize mechanical shock and eliminate mechanical shocks. The cylindrical disconnection contact 340 is slid and inserted into the adapter 216 connected to the vacuum valve movable electrode 212 to contact the vacuum valve insulation rod by the accumulated energy. 217 is operated in the contact with the cylindrical insulating section insulating rod to directly transfer energy to the movable electrode 212 of the vacuum valve to simplify the structure of the insulating housing and to apply a spring sliding contact on the inner side of the disconnecting section It has a shape that minimizes more than twice the existing size compared to the existing tubip contact. The charged energy uses a mechanical spring but can also be driven using other types of electrical energy (forces), such as electric or electromagnetic forces.

 In addition, by using the cylindrical disconnection contact 340, the sliding contact and the adapter 216, the expansion spring which is an essential component of the existing invention that can cope with the existing vacuum valve autism force is not used, thereby saving space. In addition, there are many places where charges are concentrated on the tubular contacts, which consist of the assembly of several parts such as springs to maintain the positions of the contacts, which are the characteristics of the tubip contacts, and thus, a simple processed conductor that causes partial discharge and insulation breakdown. By using the inner and outer sliding contact is completed by inserting into the configuration was configured to improve the workability and productivity in the manufacturing of the insulating housing.

100: housing body
210: vacuum valve
211: vacuum valve fixed electrode
212 vacuum valve movable electrode
213: vacuum valve contact
214: vacuum valve SOHO
215: Silicone Rubber
216 adapter
220: primary conductor
230: Primary side voltage sensor
300: disconnection unit
310: fixed electrode
320: Outer spring slide contact
330: inner spring slide contact
340: cylindrical disconnection contact
350: insulated rod (ribbed shape)
370 Guide
500: Current Transformer
510: secondary voltage sensor
520: secondary conductor
700: spring shaft lever (or disconnection lever)
800: vacuum valve operating lever

Claims (9)

In the insulating housing 100 consisting of a disconnecting unit 300 and a vacuum valve 210 to cut off electricity,
The vacuum valve 210 is composed of a fixed electrode 211 and a movable electrode 212 therein,
The movable electrode 212 and the electricity supply adapter 216 and the vacuum valve insulating rod 217 of the vacuum valve 210 is configured to be connected,
The vacuum valve insulating rod 217 and the adapter 216 may be connected to the disconnecting contact 340 having a cylindrical shape connected to the insulating part insulating rod 350 so as to contact the adapter 216 with the inner and outer sliding contacts 320 and 330. So you can wrap around and move around,
The adapter 216 is configured to be connected to the movable electrode 212 in the vacuum valve 210,
The spring accumulated lever 700 moves the disconnecting unit movable shaft while the cylindrical disconnecting unit 300 and the vacuum valve 210 are open, respectively, and the disconnection unit contact 340 moves upward to contact the adapter 216. By operating the vacuum valve movable lever 800 by operating the vacuum valve movable shaft to raise the vacuum valve insulating rod 217 and to raise the movable electrode 212 in the vacuum valve 210 in contact with the fixed electrode 211 Configure it to
Interlocking insulation housing of the disconnecting unit and the vacuum valve, characterized in that the disconnecting electrode fixed electrode 310 is configured to be connected to the secondary side conductor. The method of claim 1,
The vacuum valve movable electrode 212 and the disconnection unit contact portion 340 formed in a cylindrical shape are interlocked with each other to be driven at the time of opening and closing. delete The method of claim 2,
The driving method when opening
In order to open in a state where the fixed electrode 211 and the movable electrode 212 in the vacuum valve 210 are in contact with each other, the vacuum valve movable lever 800 is moved when the spring axis lever 700 moves to the disconnecting part movable shaft to operate the vacuum valve. By moving the vacuum valve insulating rod 217 downward with the movement of the shaft, the vacuum valve is opened first, and the disconnection unit moving shaft is moved by opening the spring axis lever 700 to open the cylindrical disconnection unit contact 340. Interlocking insulating housing of disconnecting unit and vacuum valve. The method of claim 1,
The accumulated energy is interlocked insulation housing of the disconnecting unit and the vacuum valve, characterized in that a spring is used. The method of claim 1,
The accumulated energy uses electric energy to interlock the insulating housing of the disconnecting unit and the vacuum valve. The method of claim 1,
The vacuum valve insulating rod 217 is an interlocking insulating housing of the disconnecting unit and the vacuum valve, characterized in that configured for electrical insulation with the cylindrical disconnecting unit contact 340 and the disconnecting unit fixed electrode 310. The method of claim 1,
Interlock type insulating housing of the disconnecting unit and the vacuum valve, characterized in that the rib shape is configured to prevent the creepage discharge of the insulating rod insulating rod. The method of claim 1,
The disconnection part of the disconnection unit and the vacuum valve are characterized in that the cylindrical configuration and the vacuum valve insulating rod 217 is a structure that can serve as a guide when moving in the cylindrical disconnection contact (340). Insulation Housing.

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