KR101024671B1 - Gas Insulation switchgear - Google Patents

Abstract

The present invention relates to a gas insulated switchgear, and more particularly, to a bidirectional driven gas circuit breaker of the gas insulated switchgear to the circuit breaker while the movable part and the fixed part is operated at the same time during the breaking operation of the breaker.

To this end, the present invention includes a fixed cylinder including a fixed cylinder partitioned into the arc-extinguishing space and the operating space by the partition cone, and a driven arc contact that is movably installed through the central portion of the partition cone; A movable portion including a movable cylinder, a movable arc contact in contact with the driven arc contact and energized, and a nozzle for guiding arc extinguishing gas to the arc generating site; A rotary link rotatably installed in an operating space of the fixed cylinder, the rotation links being formed at different ends with respect to the rotation center; A first linking unit which transmits an operating force according to the movement of the nozzle to the rotary link to rotate the rotary link; And a second interlocking part which transmits the operating force according to the rotation of the rotary link to the driven arc contactor to horizontally move the driven arc contactor, and one end of which is rotatably moved in the operating space of the fixed cylinder. A bidirectional horizontally driven gas circuit breaker for a gas insulated switchgear is provided.

Bidirectional horizontally driven gas circuit breaker, rotary link, connecting link, guide slit

Description

Bi-directional horizontally driven gas circuit breaker for gas insulated switchgear {Gas Insulation switchgear}

The present invention relates to a gas insulated switchgear, and more particularly, to a two-way gas insulated switchgear of the gas insulated switchgear of the new type in which the circuit is blocked while the movable part and the fixed part are operated at the same time during the breaking operation of the breaker. will be.

In general, Gas Insulation Switchgear (GIS) uses insulation gas (SF6) with excellent insulation performance and arc extinguishing function in a metal sealed container (tank) as an insulating medium to store conductors and various protective devices for reliability. It is an improved water substation facility and consists of various components such as circuit breaker, disconnecting switch, and earthing switch.

The circuit breaker of the gas insulated switchgear is a main protection device that safely protects the power system by blocking an accident current even in abnormal conditions such as a ground fault, a short circuit and a load accident as well as the opening and closing of a line in a normal state.

This breaker moves the cylinder rod connected to the cylinder to the trip position by the driving force generated from an actuator such as an electric spring charged by hydraulic, pneumatic or motor, which is the driving device of the breaker. When the insulating SOHO gas in the compression chamber is compressed by the movement of the cylinder rod, the compressed high-pressure SOHO gas is injected into the arc to cool and arc the fault current to cut off the current. Therefore, the trip operation for breaking the fault current requires a higher output than the closing operation.

The structure for the trip operation of the circuit breaker is largely divided into a unidirectional driving method and a bidirectional driving method.

In this case, the unidirectional driving method is a structure in which the fixed arc portion is kept fixed and only the movable side is retracted so that the movable arc contact portion of the movable portion is short-circuited from the fixed arc contact portion of the fixed portion.

In addition, the bidirectional driving method is configured such that the movable arc contactor of the movable part and the fixed arc contactor of the fixed part interlock with each other so that a fault current flows to cut off the circuit, so that the movable arc contactor and the fixed arc contactor mutually simultaneously. It is a structure configured to be short-circuited by moving away from the liver.

The two-way driving method of the above-described two structures has the advantage that can not only block a relatively large current, but also can reduce the operating force, there is a problem that the configuration of the mechanism is complicated and economical design should be considered.

Therefore, in the related art, a gas circuit breaker of a gas insulated switchgear using a bidirectional driving method having various structures has been developed, such as Korean Patent Nos. 10-0618605, 10-0675984, and Utility Model No. 20-0438667. do.

In the normal trip operation, when the movable arc contactor and the driven arc contactor are separated from each other (no separation is possible), the operation can be performed with a relatively small force, but the two arc contactors are separated from each other. Relatively large forces are required when an arc is generated.

However, the structure of the gas circuit breaker of the gas insulated switchgear applying the conventional bidirectional drive method described above is the same force at all points in the process that the movable arc contactor and the driven arc contactor are spaced in opposite directions in the trip operation. As it is configured to provide an arc, when the arc generation that requires a substantially large force can not be released quickly, arc extinguishing performance is inevitably deteriorated, especially in the structure for the small current interruption that requires a fast arc breaking speed There is a problem that is difficult.

Of course, in the case of Korean Patent Nos. 10-0548772, 10-0630006, and 10-0630007, a technical configuration is mentioned in which a rapid departure occurs at the time of arc generation during a trip operation.

However, the above-described techniques are not configured to be rapidly accelerated at a certain point in time in a continuous state, but are configured to be accelerated only at a particular point in time in a discontinuous state, thereby preventing a smooth operation due to interruption of the transfer of the operating force. Not only has a problem, but also has a problem that a large operating force must be provided to be able to operate quickly at the specific time.

The present invention has been made to solve the various problems according to the prior art described above, the object of the present invention is to provide a limited operating force when the separation between the movable arc contact of the movable portion and the driven arc contact of the fixed portion can be distributed at the required time The arc force can be made as soon as possible by allowing the operation force to be continuously increased rapidly at a necessary time, and to allow the driven arc contactor to move stably along the horizontal direction, thereby increasing the operating force for the movement of the driven arc contactor. It provides a new type of bidirectionally driven gas circuit breaker for gas insulated switchgear that can be relatively reduced.

According to the bidirectional actuated gas circuit breaker of the gas insulated switchgear according to the present invention for achieving the above object, a fixed cylinder partitioned into a extinguishing space and an operating space by a partition cone, and a central portion of the partition cone within the fixed cylinder, are provided. A fixed part including a driven arc contact member movably installed therethrough; A movable part including a movable cylinder, a movable arc contactor which is brought into contact with the driven arc contact while being energized in a direction opposite to the driven arc contactor, and a nozzle for guiding arc extinguishing gas to the arc generating site; A rotary link rotatably installed in an operating space of the fixed cylinder, the rotation links being formed at different ends with respect to the rotation center; A first interlocking unit for transmitting the operating force according to the movement of the nozzle to the rotary link to rotate the rotary link; And a second interlocking part which transmits the operating force according to the rotation of the rotary link to the driven arc contactor to horizontally move the driven arc contactor, and one end of which is rotatably moved in the operating space of the fixed cylinder. Characterized in that configured to include.

Here, one end of the first interlocking portion is connected to the nozzle of the movable portion, the other end of the connecting rod is located in the operating space through the partition cone, and one end is connected to the other end of the connecting rod and the other end is a rotary link It characterized in that it comprises a first connection link rotatably connected to the end of the relatively long side of both ends of the.

In addition, one end of the second interlocking portion is connected to a driven arc contactor of the fixed portion, and the other end thereof is lifted and rotatably connected to an inner wall surface of the fixed cylinder of the fixed portion, and an inner portion of both ends of the rotary link is provided. The second connecting link is rotatably connected to the end of the relatively short side, and is installed on the inner wall surface of the fixed cylinder while the other end of the second connecting link is installed in the up and down direction so as to move and move rotatably It characterized in that it comprises a guide frame which is connected along the guide slit is formed.

The second connecting link and the driven arc contact are configured to be connected by a third connecting link, and both ends of the third connecting link are rotatably connected to the second connecting link and the driven arc contact, respectively. It is done.

In addition, the guide frame is characterized in that it is configured to be detachably coupled to the inner wall surface of the fixed cylinder.

In addition, at least one guide ring is configured to support a horizontal movement of the driven arc contact in a portion of the partition cone through which the driven arc contact is penetrated.

As described above, the bidirectional driven gas circuit breaker for the gas insulated switchgear according to the present invention has an effect of improving the breaking performance with low operating force compared to the gas circuit breaker of the unidirectional driving method.

In particular, the bidirectional driven gas circuit breaker for the gas insulated switchgear of the present invention allows the driven arc contactor to move slowly compared to the movable arc contactor during the initial trip operation, and is continuously operated so as to move as quickly as possible while rapidly operating when the current interruption is required. As configured to operate has an effect that can further improve the blocking performance compared to the conventional general bi-directional gas circuit breaker.

Furthermore, since the current is interrupted by the continuous operation as described above, there is an effect that stable current blocking can be achieved even with the provision of low operating force.

Hereinafter, a preferred embodiment of a bidirectional driven gas circuit breaker for a gas insulated switchgear according to the present invention will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, a bidirectional-driven gas circuit breaker (hereinafter, referred to as a “gas circuit breaker”) for a gas insulated switchgear according to an exemplary embodiment of the present invention includes a fixed part 100, a movable part 200, and an interlocking part. It is composed.

This will be described in more detail below for each configuration.

First, the fixing part 100 is a part fixedly installed in an enclosure (not shown) constituting a gas insulated switchgear, and serves to energize a current by a selective contact operation of the movable part 200.

The fixed part 100 includes a fixed cylinder 110, a driven arc contact 120, and a fixed main contact 130.

Here, the fixed cylinder 110 is provided with a fixed main contact 130 around the front side (side adjacent to the movable part) while having a space in which a part of the movable part 200 is recessed.

At this time, the internal space of the fixed cylinder 110 is the arc space (space that is energized or moved while the movable side is recessed by the partition cone 140) and the operating space (space for the interlocking link to be described later operating) It is formed to be partitioned with each other, the through-hole 141 is formed in the central portion of the partition cone 140.

In addition, the driven arc contact 120 is configured to be able to move back and forth through the through-hole 141 of the partition cone 140 in a state of being installed at a central side portion in the fixed cylinder 110.

In this case, one or more guide rings 150 are further included in the inner circumferential surface of the through-hole of the partition cone 140. The guide ring 150 is a ring for supporting the horizontal movement of the driven arc contact (120).

Next, the movable part 200 is a series of configurations for energizing a current while selectively contacting the fixing part 100, and the whole of the movable part 200 is moved forward and backward (in a direction adjacent to the fixing part or away from the fixing part). Direction) is installed to be movable.

The movable part 200 includes a movable cylinder 210, a movable arc contactor 220, a movable main contactor 230, and a nozzle 240.

At this time, the movable cylinder 210 is a series of components forming the appearance of the movable portion 200 is formed in the form of an empty pipe, it is configured to have a thermal chamber 211 and the compression chamber 212.

In addition, the movable arc contactor 220 is a series of configurations in which current is supplied while the driven arc contactor 120 of the fixed part 100 is connected in a recessed manner so that the movable arc contactor 220 receives the driving force by the driving rod 250 to move back and forth. It is composed. At this time, the driving rod 250 is connected to the rear (direction opposite to the direction toward the fixing portion) of the movable arc contact 220, and can move back and forth through the center portion of the rear side of the movable cylinder 210. It is configured.

In addition, the movable main contactor 230 is a series of components that are energized while being in contact with the fixed main contactor 130 of the fixed part 100.

In addition, the nozzle 240 is a series of configurations for guiding the arc extinguishing gas SF6 to be injected to the arc generating site. At this time, the rear end of the nozzle 240 is configured to be fixed to the movable main contactor 230, the front end of the nozzle 240 is the front of the inner space of the fixed cylinder 110 forming the fixing part 100 It is comprised so that it may move back and forth in the state located in the arc extinguishing space which is a side space.

Next, the linkage part is a series of configurations such that the driven arc contact 120 is continuously moved in a direction opposite to the movable arc contact 220 by the operation of the movable arc contact 220.

In particular, the linkage unit according to the embodiment of the present invention is spaced apart from the movable arc contactor 220 compared to the initial stage in which the driven arc contactor 120 is separated from the movable arc contactor 220. It is suggested that the driven arc contact 120 is operated to retreat faster than the movable arc contact 220 at the time the arc is generated, and that this operation is configured to be continuous without interruption.

That is, when the movable arc contactor 220 and the driven arc contactor 120 are operated to be spaced apart from each other, but the actual spacing is not achieved, the speed at which the driven arc contactor 120 retreats may be made relatively slowly, and the movable When the arc contact 220 and the driven arc contact 120 are apart from each other, when the arc is generated, the driven arc contact 120 is retracted more quickly and away from the movable arc contact 220 to provide an arc extinguishing effect. When the driven arc contactor 120 and the movable arc contactor 220 are completely separated from each other, the speed at which the driven arc contactor 120 retreats may be made relatively slowly.

To this end, the embodiment of the present invention proposes that the linkage includes a rotary link 300, a first linking unit 400, and a second linking unit 500.

Here, the rotary link 300 is a link rotatably installed on any one of both wall surfaces in the working space formed in the fixed cylinder 110, both ends with respect to the rotation center coupled to the fixed cylinder 110. Are made of different lengths.

That is, one end of the rotary link 300 (hereinafter referred to as "first connection end") 310 is compared to the other end (hereinafter referred to as "second connection end") 320 A relatively long length is formed based on the rotation center.

In addition, the first linking unit 400 transmits an operating force according to the movement of the nozzle 240 constituting the movable unit 200 to the rotary link 300 to rotate the rotary link 300. As a configuration, the connection rod 410 and the first connection link 420 is configured.

The connecting rod 410 is configured such that one end is connected to the nozzle 240 of the movable part 200 and the other end penetrates an upper end of the partition cone 140 to be located in an operating space formed in the fixed cylinder 110. As the nozzle 240 moves, the fixed cylinder 110 moves horizontally.

In addition, the first connection link 420 is a link that both ends rotatably connected to the other end of the connection rod 410 and the end of the first connection end 310 of the rotary link 300, respectively, of the gas circuit breaker From the initial movement of the nozzle 240 for trip to the arc generation point, the operating force transmitted from the nozzle 240 is transmitted to the rotary link 300 directly, and after the arc generation point, It serves to slowly transmit the operating force transmitted from the nozzle 240 to the rotary link (300).

In addition, the second linking unit 500 is a series of configurations for horizontally moving the driven arc contact 120 by transmitting the operating force according to the rotation of the rotary link 300 to the driven arc contact 120, It includes a guide frame 510 and the second connection link (520).

The guide frame 510 is a frame installed on the bottom of the rotary link 300 of the inner wall surface of the fixed cylinder 110, the guide slit 511 is formed along the vertical direction.

In particular, the guide frame 510 is detachably fastened to the inner wall surface of the fixed cylinder 110 so that maintenance of various components located in the operating space within the fixed cylinder 110 can be performed smoothly.

In addition, one end of the second connection link 520 is rotatably connected to the other end of the driven arc contact 120 of the fixing part 100, and the other end thereof is a guide slit 511 of the guide frame 510. It is installed to be rotatable and lifting movement, the inner portion is rotatably connected to the end of the second connection end 320 of the rotary link (300).

The interlocking structure between the rotary link 300 and the driven arc contactor 120 by the second connection link 520 as described above minimizes the load that may be generated in the linkage according to the movement of the driven arc contactor 120. It is to ensure a smooth operation even by force.

In this case, the reason why the other end of the second connection link 520 is installed as well as the lifting movement is possible when the rotation link 300 is made of the second connection link 520 and the rotary link 300 By eliminating the height difference of the rotational trajectory formed by the connection between the two by the lifting movement so that the driven arc contact 120 can be moved exactly in the horizontal direction.

Particularly, the second connection end 320 constituting the rotary link 300 has a driven arc contact 120 relatively to the center position of the second connection link 520 among the inner portions of the second connection link 520. It is connected to the position near the connection site side with). This configuration is one end of the second connection link 520 (part connected to the driven arc contact) when the second connection end 320 is located on the rear side with respect to the rotation center by the rotation of the rotary link 300 ) To achieve a state located at the rear side more than the other end (site connected to the guide slit).

 Of course, the guide slit 511 is formed in the second connection link 520 and the guide frame 510 can be rotated and raised in the guide slit 511. Action can be obtained.

On the other hand, the embodiment of the present invention further suggests that a third connection link 530 is further provided between the second connection link 520 and the driven arc contact 120.

The third connection link 530 is a series of components connecting the second connection link 520 and the driven arc contact 120, and the second connection link 520 by the rotary link 300. ) Serves to prevent the height fluctuation of the driven arc contact 120 that may be generated during the rotation.

That is, the driven arc contact 120 is moved in a horizontal state by the third connection link 530 so that it can be moved even by a low operating force.

Hereinafter, the operation of the gas circuit breaker according to the exemplary embodiment of the present invention configured as described above will be described in more detail with reference to FIGS. 1 to 3.

First, in the normal energized state of the gas insulated switchgear, the driven arc contactor 120 constituting the fixed part 100 into the movable arc contactor 220 constituting the movable part 200 as shown in FIG. Is energized.

Here, the nozzle 240 constituting the movable part 200 forms a state in which the front end thereof is located in the extinguishing space in the fixed cylinder 110 constituting the fixed part 100, and moves the movable part 200. The constituent movable main contactor 230 forms a state connected to the fixed main contactor 130 constituting the fixed part 100.

At this time, the position of the first connecting link 420 of the first linking unit 400 and the first connecting end 310 of the rotary link 300 connected thereto is located in the rear upper space of the operating space in the fixed cylinder 110. The position of the second connection end 320 of the rotary link 300 is maintained in the state of being positioned in the state of being located in the front lower space of the operating space in the fixed cylinder 110.

In addition, the upper portion of the second connection link 520 of the second linking unit 500 connected to the second connection end 320 is located in the front side compared to the rotation center of the rotary link 300 The lower portion of the second connection link 520 is maintained at the uppermost portion of the guide slot 511 formed in the guide frame 510.

When an abnormality occurs in the current system in the energized state of the gas circuit breaker or an operation for forcibly cutting off the current according to a user's need, an actuator (not shown) is driven to move the driving rod 250. Due to this, the movable part 200 retreats in a direction away from the fixing part 100.

In the process of retreating the movable part 200, the nozzle 240 is also moved in the corresponding direction, whereby the connecting rod 410 connected to the nozzle 240 is horizontally moved toward the moving direction of the nozzle 240. The first connection link 420 connected to the rear end of the connection rod 410 is moved forward to rotate the rotary link 300 counterclockwise in the drawing.

In addition, when the rotation link 300 is rotated in the counterclockwise direction as described above, the second connection link 520 connected to the second connection end 320 of the rotation link 300 is the second connection end. It is moved rearward along the rotational trajectory of 320.

At this time, the second connection link 520 is moved along the guide slit 511 of the guide frame 510 to which the other end thereof is connected while being moved backward by the second connection end 320 the rotary link 300 It gradually moves downward by the height difference (H) of the rotational trajectory formed by the second connection end 320 of the.

In particular, the second connection link 520 that connects between the second connection link 520 and the driven arc contact 120 is configured such that each connection portion thereof is rotatable. Even if is moved along the rotational trajectory of the second connection end 320 it is possible to guide the smooth horizontal movement without the inclination of the driven arc contact 120, moreover, the section through which the driven arc contact 120 passes Considering that the guide ring 150 is installed on the inner circumferential surface of the through hole 141 of the cone 140, the driven arc contactor 120 may accurately move horizontally.

Also, as described above, the movable arc contactor 220 retreats (or the connecting rod) 220 until the movable arc contactor 220 starts to depart from the driven arc contactor 120 while the movable part 200 is moved backward. The moving speed of the upper left side is higher than the moving speed of the receding (right side in the drawing) of the driven arc contact 120.

This is because the distance that the first connection link 420 moves is far from the distance that the second connection link 520 operated by the rotational movement of the rotary link 300 is driven and the driven arc contact 220 is driven. The speed of separation from the time point at which separation between the arc contacts 120 starts to the time point at which complete separation is achieved between the two arc contacts 220 and 120 may be realized.

In addition, when the movable arc contact 220 starts to be separated from the driven arc contact 120 as described above, an arc is generated between the movable arc contact 220 and the driven arc contact 120. This is the same as in FIG. 2.

However, since the movable arc contactor 220, which is the time when the arc is generated as described above, is separated from the driven arc contactor 120, the driven arc contactor 120 is relatively compared to the movable arc contactor 220 as described above. Because of the rapid movement, the separation between the arc contacts 120 and 220 can proceed rapidly, and the insulating gas compressed in the compression chamber 212 in the movable cylinder 210 is guided by the nozzle 240 to the arc generating site. Because of this, the arc quickly extinguishes and the current is interrupted. This is as shown in Figure 3 attached.

Accordingly, the driven arc contactor 120 and the movable arc contactor 220 are smoothly detached from each other during the extinguishing process due to the detachment from each other, so that the arcing contact is smoothly made, particularly as described above. ) And the movable arc contactor 220 are moved in the opposite direction to each other, so that it is possible not only to prevent the malfunction due to the instantaneous movement, but also to separate the arc contactors 120 and 220. It has the advantage that the working force can be minimized.

1 is a cross-sectional view of the main portion shown to explain the energized state of the bidirectional driven gas circuit breaker for a gas insulated switchgear according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating main parts of a bidirectional driven gas circuit breaker for a gas insulated switchgear according to a preferred embodiment of the present invention to explain a state of an arc generation time of an operation for current interruption; FIG.

3 is a cross-sectional view illustrating main parts of a bi-directional gas circuit breaker for a gas insulated switchgear according to a preferred embodiment of the present invention for explaining a completion state of an operation for interrupting a current;

Explanation of symbols for main parts of the drawings

100. Fixed part 110. Fixed cylinder

120. Driven arc contact 130. Fixed main contact

140. Block cone 141. Through hole

150. Guide ring 200. Moving part

210. Movable Cylinder 211. Heat Chamber

212. Compression chamber 220. Movable arc contact

230. Movable main contactor 240. Nozzle

250. Driving Rod 300. Rotating Link

310. First connection end 320. Second connection end

400. First interlocking portion 410. Connecting rod

420. First connecting link 500. Second interlocking portion

510. Guide frame 520. Second connection link

530. Third connection link

Claims (6)

A fixed part including a fixed cylinder partitioned into the arc-extinguishing space and the operation space by the partition cone, and a driven arc contactor movably installed through the central portion of the partition cone in the fixed cylinder; A movable part including a movable cylinder, a movable arc contactor which is brought into contact with the driven arc contact while being energized in a direction opposite to the driven arc contactor, and a nozzle for guiding arc extinguishing gas to the arc generating site; A rotary link rotatably installed in an operating space of the fixed cylinder, the rotation links being formed at different ends with respect to the rotation center; A first linking unit which transmits an operating force according to the movement of the nozzle to the rotary link to rotate the rotary link; And, And a second interlocking part configured to transmit an operating force according to the rotation of the rotary link to the driven arc contactor to horizontally move the driven arc contactor, and one end of which is rotatably and liftably moved in the operating space of the fixed cylinder. Bidirectional horizontally driven gas circuit breaker for gas insulated switchgears, characterized in that it is configured. The method of claim 1, The first interlocking portion A connection rod having one end connected to the nozzle of the movable part and the other end positioned in the operation space through the partition cone; One end is connected to the other end of the connecting rod and the other end includes a first connection link that is rotatably connected to the end of the relatively long side of both ends of the rotary link for gas insulated switchgear Bidirectional horizontally driven gas circuit breaker. The method of claim 1, The second interlocking portion One end is connected to the driven arc contactor of the fixed part, and the other end thereof is lifted and rotatably connected to the inner wall of the fixed cylinder of the fixed part, and an inner part of the opposite side of the rotary link has a relatively short length. A second connecting link rotatably connected at the end, Gas insulation opening and closing, characterized in that it comprises a guide frame which is installed on the inner wall surface of the fixed cylinder and the guide slit is formed along the up and down direction so that the other end of the second connection link is moved up and down and rotatably installed in the connected state. Bidirectional horizontally driven gas circuit breaker for the device. The method of claim 3, wherein The second connecting link and the driven arc contact are configured to be connected by a third connecting link, Both ends of the third connection link are rotatably connected to the second connection link and the driven arc contact, respectively. The method of claim 3, wherein The guide frame is a bidirectional horizontally driven gas circuit breaker for a gas insulated switchgear, characterized in that is configured to be detachably coupled to the inner wall surface of the fixed cylinder. The method of claim 1, Bidirectional horizontally driven gas circuit breaker for gas insulated switchgear, characterized in that at least one guide ring is configured to support the horizontal movement of the driven arc contact in the portion of the compartment cone through which the driven arc contact is penetrated. .

Images