KR101296893B1 - Gas insulated switchgear - Google Patents

Abstract

PURPOSE: Gas insulated switchgear is provided to easily perform cooling by circulating hot temperature insulation gas heated by an arc in a moving contact part and low temperature insulation gas to a specific path. CONSTITUTION: Gas insulated switchgear includes a fixed contact part (210) and a moving contact part (220). The fixed contact part includes a fixed arc contact point member and a fixed main contact member. The moving contact part includes a cylinder, a moving shaft part, and a partition wall. The cylinder includes a moving main contact point member and an external nozzle. The moving main contact member is contained by the fixed main contact point member. The external nozzle is combined with the inside of the moving main contact point member. The moving shaft part includes a moving arc contact point member, a moving shaft, and an internal nozzle. The moving shaft is combined with one end of the moving arc contact point member. One end of the moving shaft is inserted to the external nozzle. The size of the moving shaft is getting wider from one end to the other end. The internal nozzle surrounds the moving arc contact point member and is combined with the moving shaft. The partition wall is combined with the moving shaft and divides the inside of the cylinder.

Description

[0001] GAS INSULATED SWITCHGEAR [0002]

The present invention relates to a gas insulation switchgear, and more particularly, to facilitate the cooling of the insulation gas by inducing the insulation gas flowing from the pap chamber of the circuit breaker to the thermal chamber in a specific direction to facilitate the blocking performance The present invention relates to a gas insulated switchgear that can be improved.

Generally, gas insulated switchgear is composed of bus, disconnector, current transformer, circuit breaker, repair ground switch, line disconnect switch, line ground switch and bushing. The gas insulated switchgear is equipped with switchgear, breaker, repair grounding switch, line disconnector and line grounding switch, and busbars, current transformers and bushings in the metal tank enclosure. It is an opening / closing system that is filled and sealed using this excellent SF6 gas as an insulating medium. In this case, the breaker keeps current flowing through the current and protects the converter and the main equipment by operating instantaneously when an error occurs in the circuit.

The conventional gas insulated switchgear 100 includes a fixed contact 110 and a movable contact 120. The fixed contact 110 includes a fixed main contact member 111, a fixed arc contact member 112, and a fixed side shield 113. The fixed contact portion 110 further includes a cylindrical fixed conductor portion 114, and the fixed main contact member 111 is coupled to one end of the fixed conductor portion 114. In addition, the fixed contact portion 110 is a fixed arc contact member 112 is located inside the fixed conductor portion 114. The fixed side shield 113 surrounds the outside of the fixed main contact member 111 spaced apart.

The movable contact portion 120 includes a movable main contact member 121, a movable arc contact member 122, an outer nozzle 123, an inner nozzle 124, and a movable shaft 125. The movable main contact member 121 is fitted to the fixed main contact member 111. The movable arc contact member 122 receives the fixed arc contact member 112. The outer nozzle 123 is coupled to the inside of the movable main contact member 121. The inner nozzle 124 surrounds the movable arc contact member 122 and is spaced apart from the outer nozzle 123 to provide a movement path of the insulating gas. The movable shaft 125 couples the inner nozzle 124 to one end, and couples the movable arc contact member 122 to the inside of one end to which the inner nozzle 124 is coupled. In addition, when the movable shaft 125 does not have a guide part for inducing gas flow The hot insulating gas to be heated is induced to flow as a whole inside the movable contact portion (120). The high temperature insulating gas flowing in the inside of the movable contact portion 120 through the movement path of the insulating gas may not be properly circulated and cooled in the movable contact portion 120, resulting in a problem that the insulation performance of the insulating gas is degraded when the current is interrupted. Can be. In addition, the gas insulated switchgear 100 may be a problem that can be re-ignition after blocking by the high temperature insulating gas insufficient cooling.

Korean Patent No. 10-0345691 relates to a complex extinguishing gas circuit breaker, and to provide a complex extinguishing gas circuit breaker capable of obtaining excellent breaking performance with a small operating force. Complex extinguishing type gas circuit breaker according to the disclosed technology is to cut off when a fault occurs and a fault current flows, and the circuit breaker has a fixed arc contact part, a movable arc contact part, a paper cylinder, a nozzle and a piston, and the breaker part. In a gas circuit breaker having a manipulator for operation, the volume of the popper cylinder is relatively smaller than that of the equivalent paper breaker, and on one side of the cylinder a thermal expansion chamber for generating a high gas pressure by using thermal energy during arc generation. It is provided, the manipulator is composed of an electric spring manipulator. According to the disclosed technology, since the interruption of the small current in the blocking of the fault current is performed by the pressure rise of the popper cylinder, and the interruption of the large current is achieved by the pressure rise of the thermal expansion chamber provided separately, As a result, it does not require a large pressure rise in the popper cylinder, and thus, it is possible to extend the life of the circuit breaker by preventing excessive shock to the circuit breaker and to use a small manipulator with a small operating force. have.

Korean Patent No. 10-0212820 can slide through an arc extinguishing gas, a fixed contactor, a movable contactor disposed to face the fixed contactor, a fixed piston, and the fixed piston so as to contact the fixed contactor. And a drive shaft for driving the movable contactor to the opposite side of the stationary contact, and slidably fixed on the stationary piston, and having a puffer chamber interoperating with the stationary piston to form a puffer chamber therein. The outer cylinder mounted on the outer circumference to form a thermal puffer chamber outside the puffer cylinder, a cover covering the outer surface of the movable contact, and a first gas flow path to guide the extinguishing gas from the puffer chamber to the arc generator; Arc generation from the first insulating nozzle and the heat puffer chamber surrounding the cover And a second insulating nozzle surrounding the first insulating nozzle to form a second gas passage guiding the arc extinguishing gas.

Korea Patent Registration No. 10-0345691 Korea Patent Registration No. 10-0212820

One embodiment of the present invention is to provide a gas insulation switchgear capable of directing a high temperature insulation gas and a low temperature insulation gas heated by an arc inside a movable contact portion in a specific path.

One embodiment of the present invention is to provide a gas insulation switchgear that can be smoothly cooled by circulating a high temperature insulation gas and a low temperature insulation gas in a specific path inside the movable contact.

One embodiment of the present invention is to provide a gas insulation switchgear that can quickly recover the insulation performance of the insulating gas when the high temperature insulating gas inside the movable contact to quickly cool.

Among the embodiments, the gas insulated switch includes a fixed contact portion including a fixed arc contact member and a fixed main contact member, and (i) a movable main contact member received by the fixed main contact member and inside the movable main contact member. A cylinder including an external nozzle coupled thereto, (ii) a movable arc contact member for receiving the fixed arc contact member, the movable arc contact member coupled to one end and the one end being spaced apart from the external nozzle, the other end direction being A movable shaft portion including a movable shaft that is gradually widened toward the movable shaft and an inner nozzle surrounding the movable arc contact member and coupled to the movable shaft, and (iii) a partition wall coupled to the movable shaft to divide the inside of the cylinder. It includes.

In one embodiment, the movable contact portion further comprises a piston fitted to the cylinder, the insulating gas may be filled between the partition and the piston.

In one embodiment, the partition wall includes a hole inclined at a specific angle, the inclined hole is inclined in a direction gradually narrower toward the first direction about the movable axis, the inclination angle is between 0 to 60 degrees It may correspond to.

In an embodiment, the partition wall may further include a disk-type relief valve capable of closing the inclined hole and a guide and an elastic member supporting the relief valve, disposed at one end in the direction of the movable main contact member.

The gas insulation switchgear according to an embodiment of the present invention may induce a high temperature insulation gas and a low temperature insulation gas heated by an arc inside a movable contact portion to a specific path.

Gas insulation switchgear according to an embodiment of the present invention can be smoothly cooled by circulating a high temperature insulating gas and a low temperature insulating gas in a specific path inside the movable contact.

Gas insulation switchgear according to an embodiment of the present invention can quickly recover the insulation performance of the insulating gas when the high-temperature insulating gas inside the movable contact portion to cool quickly.

1 is a view for explaining a conventional gas insulated switchgear.
2 is a view illustrating a gas insulated switchgear according to an embodiment of the present invention.
3 is a view for explaining the movable contact in FIG.
4 is a view for explaining the partition wall in FIG. 2.
5 is a view for explaining the movement of the low-temperature and high-temperature insulation gas in the gas insulation switchgear in FIG.

Description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terms defined in the commonly used dictionary should be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

2 is a view illustrating a gas insulated switchgear according to an embodiment of the present invention.

Referring to FIG. 2, the gas insulation switch 200 includes a fixed contact 210 and a movable contact 220.

The fixed contact portion 210 and the movable contact portion 220 are filled and sealed together using SF6 gas having excellent insulation performance and extinguishing ability as an insulating medium in an enclosure (not shown). In one embodiment, the stationary and movable contacts 210, 220 are in contact with each other through the current, and momentarily operate when a fault occurs in the circuit, causing contact to drop and interrupt the circuit. This circuit break may serve to protect external converters or peripherals.

The fixed contact portion 210 includes a fixed arc contact member 211, a fixed main contact member 212 and a fixed conductor portion 213. The fixed arc contact member 211 is disposed at the center of the fixed conductor portion 213. The fixed main contact member 212 is disposed to be spaced apart from the fixed arc contact member 211 and is coupled to one end of the fixed conductor portion 213. The fixed conductor portion 213 may have a cylindrical shape, and may form a double outer wall to provide a movement path of the insulating gas. Hereinafter, the movable contact portion 220 will be described in more detail with reference to FIG. 3.

3 is a view for explaining the movable contact in FIG.

Referring to FIG. 3, the movable contact portion 220 includes a cylinder 310, a movable shaft portion 320, and a partition wall 330. In one embodiment, the cylinder 310 may be connected with the movable shaft 320 to move together through the movement of the movable shaft 320. In addition, the movable contact portion 220 further includes a piston portion 340. The piston part 340 is fitted to one end of the cylinder 310. The interior of the cylinder 310 is divided into two through the movable shaft 320 and the partition wall 330 to form the first and second chambers (311, 312). The first and second chambers 311 and 312 formed inside the cylinder 310 are filled with insulating gas.

The cylinder 310 includes a movable main contact member 313 and an outer nozzle 314. The movable main contact member 313 is received by the fixed main contact member 212. The outer nozzle 314 is coupled inside the movable main contact member 313. In one embodiment, the cylinder 310 may include a through hole to which the movable main contact member 313 and the outer nozzle 314 are coupled at one end, and the fixed arc contact member 211 is fitted.

The movable shaft 320 includes a movable arc contact member 321, a movable shaft 322, and an internal nozzle 323. The movable arc contact member 321 receives the fixed arc contact member 211.

The movable shaft 322 couples the movable arc contact member 321 to one end. In one embodiment, the movable shaft 322 is configured in a cylindrical shape, and the movable arc contact member 321 is located inside. In one embodiment, the movable shaft 322 is fitted with the movable arc contact member 321 at one end spaced apart from the outer nozzle 314 and widens gradually toward the other end. The space between the movable shaft 322 and the outer nozzle 314 provides a moving path of the hot insulating gas, and the moving path guides the hot insulating gas to flow in a predetermined direction inside the cylinder 310.

The inner nozzle 323 surrounds the movable arc contact member 321 and is coupled to the movable shaft 322. In an embodiment, the inner nozzle 323 may be spaced apart from the outer nozzle 314 to provide a movement path of the insulating gas together with the movable shaft 322.

The partition wall 330 is coupled to the movable shaft 322 inside the cylinder 310 and divides the inside of the cylinder 310. In one embodiment, the partition wall 330 may divide the cylinder 310 in the axial direction to form the first and second chambers 311 and 312 inside the cylinder 310, and also, the partition wall 330 Is coupled to the inside of the cylinder 310, the cylinder 310 may be moved together according to the movement of the movable shaft 322. Hereinafter, the partition wall 330 will be described in more detail with reference to FIG. 4.

4 is a view for explaining the partition wall in FIG. 2.

Referring to FIG. 4, the partition wall 330 further includes an inclined hole 410, a relief valve 420, a valve guide 430, and an elastic member 440. The inclined hole 410 is formed to be inclined at a specific angle. In one embodiment, the inclined hole 410 may be narrowed inward toward the movable arc contact member 321 at one end with the movable shaft 322 as the central axis. In this case, the inclined angle may correspond to 0 to 60 degrees with respect to the movable shaft 322.

The relief valve 420 is disposed on one surface in the direction of the movable arc contact member 321, and is configured in a disk shape to close the inclined hole 410. The movable contact 220 compresses the second chamber 312 and increases the pressure of the insulating gas filled in the second chamber 312 when the movable contact 220 moves. The elevated pressure of the insulation gas is opened by pushing the relief valve 420, and the insulation gas is discharged into the cylinder 310 along the inclined hole 410. At this time, the insulating gas is discharged in a predetermined direction by the angle of the inclined hole 410.

The valve guide 430 supports the relief valve 420 and provides a path to move when the relief valve 420 opens or closes the inclined hole 410.

The elastic member 440 surrounds the valve guide 430 and supports the relief valve 420. The elastic member 440 may contract when the relief valve 420 is opened, and may close the relief valve 420 by an elastic force.

5 is a view for explaining the movement of the low-temperature and high-temperature insulation gas in the gas insulation switchgear in FIG.

Referring to FIG. 5, the gas insulated switchgear 100 instantly operates when an abnormality occurs in the circuit, and cuts off the circuit when the contact is dropped. At this time, the fixed and movable arc contact members 211 and 321 generate an arc as the contact is dropped, and the adjacent insulating gas is heated by the high temperature heat generated by the arc. The hot insulating gas heated near the movable arc contact member 321 is discharged into the cylinder 310 through a path formed between the outer nozzle 314, the inner nozzle 323, and the movable shaft 322. The high temperature insulating gas flows to the outside of the first chamber 311 along the outer wall of the inner nozzle 323 and the movable shaft 322. The partition wall 330 moves together with the cylinder 310 in accordance with the movement of the movable shaft 322 to compress the second chamber 312. At this time, the low-temperature insulating gas filled in the second chamber 312 opens the relief valve 420 by the pressure to be compressed and is discharged toward the movable shaft 322 along the angle of the inclined hole 410. . The high-temperature and low-temperature insulation gas flows in the same direction while mixing smoothly to cool the high-temperature insulation gas.

Although described above with reference to the preferred embodiment of the present application, those skilled in the art various modifications and changes to the present application without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

210: fixed contact portion 211: fixed arc contact member
212: fixed main contact member 213: conductor portion
220: movable contact portion 310: cylinder
311: first chamber 312: second chamber
313: movable main contact member 314: external nozzle
320: movable shaft portion 321: movable arc contact member
322: movable shaft 323: internal nozzle
330: bulkhead 410: inclined hole
420: relief valve 430: valve guide
440: elastic member

Claims (6)

A fixed contact comprising a fixed arc contact member and a fixed main contact member; And
(i) a cylinder comprising a movable main contact member received by the fixed main contact member and an outer nozzle coupled inside the movable main contact member, (ii) a movable arc contact member receiving the fixed arc contact member, The movable arc contact member is coupled to one end and the one end is spaced apart from the outer nozzle, and includes a movable shaft that is gradually widened toward the other one end, and an inner nozzle that surrounds the movable arc contact member and is coupled to the movable shaft. And (iii) a movable contact portion coupled to the movable shaft and including a partition wall for dividing the inside of the cylinder.
The connector according to claim 1, wherein the movable contact portion
And a piston unit fitted to the cylinder, wherein the insulating gas is filled between the partition wall and the piston.
The method of claim 1, wherein the partition wall
Gas insulated switchgear comprising a hole inclined at a certain angle.
The method of claim 3, wherein the inclined hole is
Gas insulated switchgear, characterized in that inclined in a direction gradually narrower toward the first direction about the movable shaft.
The method of claim 3, wherein the inclined hole is
Gas insulated switchgear, characterized in that the inclination angle is between 0 to 60 degrees.
The method of claim 1, wherein the partition wall
And a disk-type relief valve disposed at one end in the direction of the movable main contact member and capable of closing the inclined hole, and a guide and an elastic member for supporting the relief valve.

Images