CN218849310U

CN218849310U - Interlocking device for gas insulation switch cabinet

Info

Publication number: CN218849310U
Application number: CN202223307662.2U
Authority: CN
Inventors: 金贺啸; 木林森; 魏本亮; 王安心; 李逵; 徐文
Original assignee: Murge Electric Co ltd
Current assignee: Murge Electric Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-11
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses an interlock for gas insulated switchgear, including three station mechanism interlocks, circuit breaker transmission interlock, circuit breaker separating brake interlock, door interlocking jam plate and urgent unlocking device, door interlocking jam plate sets firmly with the preceding lower door of cable chamber and is connected, the utility model discloses three station mechanism interlocks, circuit breaker transmission interlock, circuit breaker separating brake interlock and door interlocking jam plate adopt mechanical interlocking, utilize the mechanical transmission part of electrical equipment body to carry out the hard shutting of control, hard shutting is the compulsory interlocking that mechanical part realized shutting, prevent that personnel from missing electrified interval, the security is good, realize the cubical switchboard under the running state, preceding lower door can't be opened, three station isolator is in ground connection position, when the circuit breaker is in combined floodgate state, preceding lower door could be opened and overhauld the maintenance, the back is opened to preceding lower door, the unable separating brake of circuit breaker, three station isolator can't withdraw from ground connection position, realize preventing electric maloperation.

Description

Interlocking device for gas insulation switch cabinet

Technical Field

The utility model belongs to the technical field of the cubical switchboard, a interlock for gas insulated switchgear is related to.

Background

In the electrified part mechanism of each level of core high voltage of cubical switchboard, need design interlock each other in order to guarantee the security, at present most receives the cubical switchboard structure influence, mainly adopts electrical interlocking to realize safeguard function, and electrical interlocking adopts electrical equipment secondary equipment to control, for soft shutting, this kind of interlocking mode is realized more easily, and is nimble simple, but prevents that the maloperation performance is poor.

Disclosure of Invention

The utility model discloses an overcome prior art not enough, provide an interlock for gas insulated switchgear.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the interlocking device for the gas insulated switchgear comprises a three-station mechanism interlocking device, a circuit breaker transmission interlocking device, a circuit breaker opening interlocking device, a door interlocking lock plate and an emergency unlocking device, wherein the door interlocking lock plate is fixedly connected with a front lower door of a cable chamber, the three-station mechanism interlocking device is locked or unlocked with the door interlocking lock plate, the circuit breaker transmission interlocking device is locked or unlocked with the door interlocking lock plate, and the circuit breaker opening interlocking device is linked with the front lower door and a circuit breaker opening and closing operating mechanism opening and closing mechanism respectively.

Furthermore, the three-station mechanism interlocking device comprises a mechanism grounding sliding plate and a linkage output assembly, the mechanism grounding sliding plate is linked with the three-station isolating switch operating mechanism, the mechanism grounding sliding plate is connected with the linkage output assembly, and the three-station isolating switch operating mechanism is locked at a grounding position through a locking mechanism.

Furthermore, the linkage output assembly comprises a mechanism grounding connecting plate, a three-station interlocking shaft, a grounding sector plate, a lower door grounding interlocking shaft and a three-station door grounding locking plate, the input end of the mechanism grounding connecting plate is rotatably connected with the mechanism grounding sliding plate, the output end of the mechanism grounding connecting plate is rotatably connected with one end of the three-station interlocking shaft, the other end of the three-station interlocking shaft is rotatably connected with the input end of the grounding sector plate, two ends of the door grounding interlocking shaft are fixedly connected with the output end of the grounding sector plate and the input end of the three-station door grounding locking plate respectively, the three-station door grounding locking plate is unlocked or locked with the door interlocking locking plate, and interlocking is formed between the three-station door grounding locking plate and the front lower door.

Furthermore, the circuit breaker transmission interlocking device comprises a connecting lever interlocking and a transmission output assembly, the connecting lever interlocking is linked with the circuit breaker opening and closing operating mechanism, the connecting lever interlocking is connected with the transmission output assembly, and when the circuit breaker opening and closing operating mechanism is switched on, the transmission output assembly is locked or unlocked with the door interlocking locking plate.

Furthermore, the transmission output assembly comprises a circuit breaker closing connecting plate, a circuit breaker closing interlocking shaft, a closing sector plate, a circuit breaker lower door interlocking shaft and a closing gate grounding locking plate, one end of the circuit breaker closing connecting plate is rotatably connected with an output end of the connecting lever interlock, the other end of the circuit breaker closing interlocking shaft is rotatably connected with the circuit breaker closing interlocking shaft, the circuit breaker closing interlocking shaft is rotatably connected with the closing sector plate, two ends of the circuit breaker lower door interlocking shaft are fixedly connected with an output end of the closing sector plate and an input end of the closing gate grounding locking plate respectively, the circuit breaker lower door interlocking shaft penetrates through the fourth support and is rotatably connected with the fourth support, the closing gate grounding locking plate is unlocked or locked with the closing gate interlocking locking plate, and the closing gate grounding locking plate and the front lower door form interlocking.

Furthermore, the door interlocking lock plate is provided with two rows of lock grooves, the opening direction of each lock groove faces towards the three-station door grounding lock plate of the three-station mechanism interlocking device and the closing gate grounding lock plate of the circuit breaker transmission interlocking device, and the two rows of lock grooves respectively correspond to the three-station door grounding lock plate and the closing gate grounding lock plate in position.

Furthermore, the breaker opening interlocking device comprises an opening locking assembly and an interlocking linkage assembly, the opening locking assembly is linked with the opening mechanism, the opening locking assembly is linked with the interlocking linkage assembly, the interlocking linkage assembly is locked or unlocked with the opening locking assembly, and locking or unlocking of opening operation of the opening mechanism is controlled, the opening locking assembly comprises a fixed shaft and a baffle, the fixed shaft is linked with the opening mechanism, the baffle is fixedly arranged on the fixed shaft, and the baffle is linked with the interlocking linkage assembly.

Furthermore, the interlocking linkage assembly comprises an interlocking plate, a first connecting plate, a second connecting plate, a guide rod and a lower door interlocking baffle, the interlocking plate is connected with the fixing mechanism in a sliding mode, the output end of the interlocking plate is fixedly provided with a supporting plate, the supporting plate is opposite to the baffle, the input end of the interlocking plate is fixedly connected with the first connecting plate, the two ends of the second connecting plate are respectively connected with the first connecting plate and the output end of the guide rod in a rotating mode, the input end of the guide rod is fixedly connected with the lower door interlocking baffle, and the lower door interlocking baffle is fixedly connected with the front lower door.

Furthermore, the emergency unlocking device comprises a fixing piece, wherein the fixing piece fixedly connects the door interlocking lock plate with the front lower door and fixedly connects the lower door interlocking baffle of the breaker opening interlocking device with the front lower door.

The three-station mechanism interlocking device further comprises a fixing support assembly, the fixing support assembly is fixedly arranged on the fixing mechanism and comprises a first support, a second support, a third support and a fourth support, the mechanism grounding sliding plate is connected with the first support in a sliding mode, a reset pressure spring is arranged between the mechanism grounding sliding plate and the fixing mechanism, the second support and the third support are located at two ends of the three-station interlocking shaft in the length direction, a first spring device is arranged between the second support and the three-station interlocking shaft, a second spring device is arranged between the third support and the three-station interlocking shaft, the lower door grounding interlocking shaft penetrates through the fourth support and is rotatably connected with the fourth support, the circuit breaker transmission interlocking device further comprises a transmission support, the transmission support is fixedly arranged on the fixing mechanism, the circuit breaker interlocking shaft penetrates through the transmission support and is slidably connected with the transmission support, the circuit breaker interlocking shaft slides up and down relative to the transmission support, the interlocking linkage assembly of the circuit breaker opening interlocking device further comprises an interlocking rack and a fixed interlocking spring, the interlocking rack is arranged on the fixing mechanism, a guide rod is slidably connected with the interlocking rack, and the interlocking spring is respectively connected with a second closing plate and the interlocking rack.

To sum up, the utility model discloses an useful part lies in:

1) The utility model discloses three station mechanism interlock, circuit breaker transmission interlock, circuit breaker separating brake interlock and door interlocking jam plate adopt mechanical interlocking, the hard shutting that the mechanical transmission part that utilizes the electrical equipment body carries out control, hard shutting is the compulsory interlocking that mechanical part realized the shutting, prevent that personnel from missing to go into electrified interval, the security is good, realize the cubical switchboard under the running state, preceding lower door can't be opened, three station isolator is in ground position, the circuit breaker is when combined floodgate state, preceding lower door could be opened and overhauls the maintenance, preceding lower door is opened the back, the unable separating brake of circuit breaker, three station isolator can't withdraw from ground position, realize preventing electric maloperation.

2) The utility model discloses a set up urgent unlocking device and after mechanical failure appears, can realize quick unblock function.

Drawings

Fig. 1 is a schematic view of an interlock apparatus according to the present invention.

Fig. 2 is a schematic diagram of an interlock apparatus according to the present invention.

The following are marked in the figure: three-position mechanism interlocking device 1, mechanism grounding slide plate 12, mechanism grounding connecting plate 13, three-position interlocking shaft 14, grounding sector plate 15, lower door grounding interlocking shaft 16, three-position door grounding locking plate 17, first support 111, second support 112, third support 113, fourth support 114, slide bar 121, reset pressure spring 181, first spring device 182, second spring device 183, chute 1111, breaker transmission interlocking device 2, crank arm interlocking 20, breaker closing connecting plate 21, breaker closing interlocking shaft 22, transmission support 23, closing sector plate 24, breaker lower door interlocking shaft 25, closing door grounding interlocking plate 26, breaker opening interlocking device 3, interlocking spring 30, fixing shaft 31, baffle plate 32, interlocking plate 33, first connecting plate 34, second connecting plate 35, interlocking frame 36, guide rod 37, lower door interlocking baffle plate 38, abutting plate 331, guide slide rod 361, guide chute 371, interlocking door locking plate 4 and locking groove 41.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic manner, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and proportion of each component may be changed arbitrarily and the layout of the components may be more complicated.

In the embodiments of the present invention, all directional indicators (such as up, down, left, right, front, rear, horizontal, vertical \8230;) are used only to explain the relative positional relationship between the components in a specific posture, the motion situation, etc., and if the specific posture is changed, the directional indicator is changed accordingly.

Because of reasons such as installation error, the parallel relation that the embodiment of the present invention indicates may actually be the approximate parallel relation, and the perpendicular relation may actually be the approximate perpendicular relation.

The first embodiment is as follows:

as shown in fig. 1-2, an interlocking device for a gas insulated switchgear comprises a three-station mechanism interlocking device 1, a circuit breaker transmission interlocking device 2, a circuit breaker opening interlocking device 3, a door interlocking lock plate 4 and an emergency unlocking device, wherein the door interlocking lock plate 4 is fixedly connected with a front lower door of a cable chamber, the three-station mechanism interlocking device 1 is locked or unlocked with the door interlocking lock plate 4, the circuit breaker transmission interlocking device 2 is locked or unlocked with the door interlocking lock plate 4, and the circuit breaker opening interlocking device 3 is linked with the front lower door and a circuit breaker opening and closing mechanism of a circuit breaker opening and closing operating mechanism respectively.

In fig. 1, the arrow a direction is a vertical direction, the positive direction of the arrow a is an upper direction, the negative direction of the arrow a is a lower direction, the arrow B direction is a front-rear direction, the positive direction of the arrow B is a forward direction, and the negative direction of the arrow B is a rear direction.

In this embodiment, the door interlock locking plate 4 is fixedly arranged at a front lower door (not shown) of the cable chamber, when the three-position mechanism interlock device 1 is locked with the door interlock locking plate 4 or/and the circuit breaker transmission interlock device 2 is locked with the door interlock locking plate 4, the front lower door cannot be opened, and when the three-position mechanism interlock device 1 is unlocked with the door interlock locking plate 4 and the circuit breaker transmission interlock device 2 is unlocked with the door interlock locking plate 4, the front lower door can be opened.

The three-station mechanism interlocking device 1 comprises a mechanism grounding sliding plate 12 and a linkage output assembly, the mechanism grounding sliding plate 12 is linked with a three-station isolating switch operating mechanism, the mechanism grounding sliding plate 12 is connected with the linkage output assembly, when the three-station isolating switch operating mechanism is switched to a grounding position, the mechanism grounding sliding plate 12 is pushed to synchronously move back and forth, the mechanism grounding sliding plate 12 moves to drive the linkage output assembly to move, the linkage output assembly is controlled to be locked or unlocked with a door interlocking locking plate 4, and meanwhile, the three-station isolating switch operating mechanism is locked at the grounding position through a locking mechanism (not shown).

The three-position mechanism interlocking device 1 further comprises a fixed bracket assembly, wherein the fixed bracket assembly is fixedly arranged on a fixed mechanism (not shown), the fixed bracket assembly comprises a first bracket 111, a second bracket 112, a third bracket 113 and a fourth bracket 114, and the second bracket 112 and the third bracket 113 are positioned in the same vertical direction.

The mechanism grounding sliding plate 12 is connected with the first support 111 in a sliding mode, a reset pressure spring 181 is arranged between the mechanism grounding sliding plate 12 and the fixing mechanism, when the three-station isolating switch operating mechanism is switched to the grounding position to drive the mechanism grounding sliding plate 12 to slide, the reset pressure spring 181 is compressed, the three-station isolating switch operating mechanism leaves the grounding position, namely when the three-station isolating switch operating mechanism is switched to the isolating position, the reset pressure spring 181 resets, and the mechanism grounding sliding plate 12 returns to the initial position.

Preferably, the first bracket 111 is fixedly provided with a sliding groove 1111, the mechanism ground sliding plate 12 is provided with a sliding rod 121, the sliding rod 121 is arranged on the sliding groove 1111, and the sliding rod 121 is in sliding connection with the sliding groove 1111, so that the sliding connection between the mechanism ground sliding plate 12 and the first bracket 111 is realized.

The linkage output assembly comprises a mechanism grounding connecting plate 13, a three-position interlocking shaft 14, a grounding sector plate 15, a lower door grounding interlocking shaft 16 and a three-position door grounding locking plate 17, wherein the input end of the mechanism grounding connecting plate 13 is rotatably connected with a mechanism grounding sliding plate 12, the output end of the mechanism grounding connecting plate 13 is rotatably connected with one end of the three-position interlocking shaft 14, the other end of the three-position interlocking shaft 14 is rotatably connected with the input end of the grounding sector plate 15, two ends of the door grounding interlocking shaft 16 are fixedly connected with the output end of the grounding sector plate 15 and the input end of the three-position door grounding locking plate 17 respectively, the lower door grounding interlocking shaft 16 penetrates through a fourth support 114 and is rotatably connected with the fourth support 114, the operation of the door grounding interlocking shaft 16 is limited through the fourth support 114, so that only the door grounding interlocking shaft can be rotatably connected, and the operation stability of the door grounding interlocking shaft 16 is ensured.

In this embodiment, the three-position disconnecting switch operating mechanism pushes the mechanism ground sliding plate 12 to slide back and forth, the mechanism ground sliding plate 12 slides backwards to drive the three-position interlocking shaft 14 to slide downwards through the mechanism ground connecting plate 13, the sliding of the three-position interlocking shaft 14 drives the lower door ground interlocking shaft 16 to rotate counterclockwise through the ground sector plate 15, i.e., in the direction C in fig. 1, the counterclockwise rotation of the lower door ground interlocking shaft 16 drives the three-position door ground locking plate 17 to rotate counterclockwise, and the counterclockwise rotation of the output end of the three-position door ground locking plate 17 realizes the motion transmission, and the counterclockwise rotation of the output end of the three-position door ground locking plate 17 unlocks the output end of the three-position door ground locking plate 17 and the door ground locking plate 4.

Preferably, the second bracket 112 and the third bracket 113 are located at both ends of the three-position interlocking shaft 14 in the longitudinal direction, i.e., in the vertical direction, and the second bracket 112 and the third bracket 113 limit the operation of the three-position interlocking shaft 14, so that the three-position interlocking shaft 14 can only slide in the vertical direction.

Preferably, a first spring device 182 is arranged between the second bracket 112 and the three-position interlocking shaft 14, a second spring device 183 is arranged between the third bracket 113 and the three-position interlocking shaft 14, when the three-position disconnecting switch operating mechanism is switched to the grounding position to drive the mechanism grounding sliding plate 12 to slide, the three-position interlocking shaft 14 moves downwards, the first spring device 182 and the second spring device 183 are compressed, the three-position disconnecting switch operating mechanism leaves the grounding position, that is, when the three-position disconnecting switch operating mechanism is switched to the isolating position, the first spring device 182 and the second spring device 183 are compressed, the three-position interlocking shaft 14 returns to the initial position, the first spring device 182 and the second spring device 183 are reset, the output end of the three-position door grounding locking plate 17 clockwise locks the output end of the three-position door grounding locking plate 17 with the door interlocking locking plate 4, and through the above structure, the three-position door grounding locking plate 17 is unlocked or locked with the door interlocking locking plate 4, so that the three-position door grounding locking plate 17 is interlocked with the front lower door.

The circuit breaker transmission interlocking device 2 comprises a connecting lever interlocking 20 and a transmission output assembly, the connecting lever interlocking 20 is linked with a circuit breaker opening and closing operation mechanism, the connecting lever interlocking 20 is connected with the transmission output assembly, when the circuit breaker opening and closing operation mechanism is switched on, the connecting lever interlocking 20 is driven to move, the connecting lever interlocking 20 moves to drive the transmission output assembly to move, and the transmission output assembly is controlled to be locked or unlocked with a door interlocking locking plate 4.

The transmission output assembly comprises a breaker closing connecting plate 21, a breaker closing interlocking shaft 22, a closing sector plate 24, a breaker lower door interlocking shaft 25 and a closing gate grounding locking plate 26, one end of the breaker closing connecting plate 21 is rotatably connected with the output end of the crank arm interlocking 20, the other end of the breaker closing interlocking shaft 22 is rotatably connected with the breaker closing interlocking shaft 22, the breaker closing interlocking shaft 22 is rotatably connected with the closing sector plate 24, two ends of the breaker lower door interlocking shaft 25 are fixedly connected with the output end of the closing sector plate 24 and the input end of the closing gate grounding locking plate 26 respectively, the breaker lower door interlocking shaft 25 penetrates through the fourth support 114 and is rotatably connected with the fourth support 114, the operation of the breaker lower door interlocking shaft 25 is limited through the fourth support 114, only the rotary connection can be realized, and meanwhile, the stability of the operation of the breaker lower door interlocking shaft 25 is ensured.

In this embodiment, the circuit breaker opening and closing operation mechanism drives the crank arm interlock 20 to rotate counterclockwise when closing, that is, in the direction of arrow D in fig. 1, the counterclockwise rotation of the crank arm interlock 20 drives the circuit breaker closing interlock shaft 22 to slide downward through the circuit breaker closing link plate 21, the downward sliding of the circuit breaker closing interlock shaft 22 drives the circuit breaker lower door interlock shaft 25 to rotate counterclockwise through the closing sector plate 24, that is, in the direction of C in fig. 1, the counterclockwise rotation of the circuit breaker lower door interlock shaft 25 rotates the closing gate ground lock plate 26 counterclockwise, the above structure realizes motion transmission, the counterclockwise rotation of the output end of the closing gate ground lock plate 26 unlocks the output end of the closing gate ground lock plate 26, and the circuit breaker opening and closing operation mechanism reversely drives the crank arm interlock 20 to lock the output end of the closing gate ground lock plate 26 and the closing gate interlock lock plate 4, and through the above structure, the closing gate ground lock plate 26 and the closing gate interlock lock plate 4 is unlocked or locked, so that the interlocking is formed between the closing gate ground lock plate 26 and the front lower door.

The circuit breaker transmission interlocking device 2 further comprises a transmission support 23, the transmission support 23 is fixedly arranged on the fixing mechanism, the circuit breaker closing interlocking shaft 22 penetrates through the transmission support 23 and is connected with the transmission support 23 in a sliding mode, and the circuit breaker closing interlocking shaft 22 can slide up and down relative to the transmission support 23.

Preferably, the transmission bracket 23 is located in a vertical direction, which is a length direction of the circuit breaker closing interlock shaft 22, and the transmission bracket 23 limits the operation of the circuit breaker closing interlock shaft 22 so that the circuit breaker closing interlock shaft 22 can only slide in the vertical direction.

The door interlocking lock plate 4 is provided with two rows of lock grooves 41, the opening direction of each lock groove 41 faces the three-station door grounding lock plate 17 and the closing door grounding lock plate 26, the two rows of lock grooves 41 respectively correspond to the three-station door grounding lock plate 17 and the closing door grounding lock plate 26, the three-station door grounding lock plate 17 falls into the lock grooves 41 to realize the locking of the three-station door grounding lock plate 17 and the door interlocking lock plate 4, the closing door grounding lock plate 26 falls into the lock grooves 41 to realize the locking of the closing door grounding lock plate 26 and the door interlocking lock plate 4, the three-station door grounding lock plate 17 is separated from the lock grooves 41 to realize the unlocking of the three-station door grounding lock plate 17 and the door interlocking lock plate 4, and the closing door grounding lock plate 26 is separated from the lock grooves 41 to realize the unlocking of the closing door grounding lock plate 26 and the door interlocking lock plate 4.

The circuit breaker opening interlocking device 3 comprises an opening locking assembly and an interlocking linkage assembly, the opening locking assembly is linked with an opening mechanism (not shown) of a circuit breaker opening and closing operating mechanism to realize locking or unlocking of opening operation of the circuit breaker opening and closing operating mechanism, and the opening locking assembly is linked with the interlocking linkage assembly to enable the interlocking linkage assembly to be locked or unlocked with the opening locking assembly so as to control locking or unlocking of opening operation.

The brake separating and locking assembly comprises a fixed shaft 31 and a baffle 32, the fixed shaft 31 is linked with the brake separating mechanism, the brake separating mechanism is started to drive the fixed shaft 31 to move forwards, the fixed shaft 31 is locked to enable the brake separating mechanism not to operate, the baffle 32 is fixedly arranged on the fixed shaft 31, the baffle 32 corresponds to the interlocking linkage assembly, and the baffle 32 is linked with the interlocking linkage assembly.

The interlocking linkage assembly comprises an interlocking plate 33, a first connecting plate 34, a second connecting plate 35, a guide rod 37 and a lower door interlocking baffle 38, the interlocking plate 33 is connected with the fixing mechanism in a sliding mode, the output end of the interlocking plate 33 is fixedly provided with a supporting plate 331, the supporting plate 331 is opposite to the baffle 32, the input end of the interlocking plate 33 is fixedly connected with the first connecting plate 34, two ends of the second connecting plate 35 are respectively connected with the first connecting plate 34 and the output end of the guide rod 37 in a rotating mode, the input end of the guide rod 37 is fixedly connected with the lower door interlocking baffle 38, the lower door interlocking baffle 38 is fixedly connected with the front lower door, when the front lower door is opened, the guide rod 37 is pulled by the lower door interlocking baffle 38 to move forwards, the guide rod 37 drives the interlocking plate 33 to move upwards through the second connecting plate 35, the supporting plate 331 moves upwards and abuts against the baffle 32, so that the fixing shaft 31 is locked, the forward movement of the fixing shaft 31 is limited, the function that the breaker cannot be separated after the front lower door is opened is realized, the safety is ensured, after the front lower door is closed, the guide rod 37 moves backwards, the supporting plate moves downwards and is separated from the baffle 331, and the breaker is separated from the fixing shaft, so that the operation of the breaker can be realized, and the operation of the breaker can be carried out.

The interlocking linkage assembly further comprises an interlocking frame 36, the interlocking frame 36 is fixedly arranged on the fixing mechanism, the guide rod 37 is connected with the interlocking frame 36 in a sliding mode, the interlocking frame 36 not only limits the moving stroke of the guide rod 37, but also guarantees the stability of the guide rod 37 in the operation process.

Preferably, the guide rod 37 is provided with a guide chute 371, the interlocking frame 36 is provided with a guide slide bar 361, the guide slide bar 361 is arranged on the guide chute 371, and the guide slide bar 361 is slidably connected with the guide chute 371, so that the guide rod 37 is slidably connected with the interlocking frame 36.

The interlocking linkage assembly further comprises an interlocking spring 30, the interlocking spring 30 is respectively connected with the second connecting plate 35 and the interlocking rack 36, the front lower door is opened, when the guide rod 37 moves forwards, the interlocking spring 30 is stretched to store energy, the front lower door is closed, the interlocking spring 30 can reset after releasing energy, the abutting plate 331 moves downwards, and the fixing shaft 31 is unlocked.

The emergency unlocking device includes a fixing member (not shown) which fixedly connects the door interlocking lock plate 4 and the front lower door and fixedly connects the lower door interlocking baffle 38 and the front lower door, preferably, the fixing member may adopt a fastening member such as a screw or a bolt, when the three-position disconnecting switch operating mechanism is not switched to the grounding position or/and the breaker opening and closing operating mechanism is not switched to the closing position, but the front lower door needs to be opened, such as when a mechanical fault occurs, the fixing member is unlocked, so that the door interlocking lock plate 4 and the front lower door are fixedly connected, and the lower door interlocking baffle 38 and the front lower door are disconnected, and at this time, the front lower door is opened.

In this embodiment implementation process, when three-station isolator operating device switches into the ground position, three-station door ground connection jam plate 17 and door interlock jam plate 4 unblock, when circuit breaker divide-shut brake operating device switches into the on position, on-off gate ground connection jam plate 26 and door interlock jam plate 4 unblock, open preceding lower door this moment, preceding lower door opens the back, circuit breaker separating brake interlock 3's support board 331 shifts up and offsets with baffle 32, locking fixed axle 31, the circuit breaker can't carry out the separating brake operation this moment, the security has effectively been improved.

As described above, the three-station mechanism interlocking device 1, the circuit breaker transmission interlocking device 2, the circuit breaker opening interlocking device 3 and the door interlocking locking plate 4 adopt mechanical interlocking, hard locking controlled by the mechanical transmission part of the electrical equipment body is utilized, the hard locking is forced interlocking of mechanical parts to realize locking, personnel are prevented from entering an electrified interval by mistake, the safety is good, the front lower door of the switch cabinet can not be opened in the operating state, the three-station isolating switch is in the grounding position, when the circuit breaker is in the closing state, the front lower door can be opened for maintenance, after the front lower door is opened, the circuit breaker can not be opened, the three-station isolating switch can not exit the grounding position, and the prevention of electrical misoperation is realized.

According to the emergency unlocking device, when mechanical failure or actual needs occur, the rapid unlocking function can be realized.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Claims

1. An interlock for a gas insulated switchgear, characterized in that: the three-station mechanism interlocking device is fixedly connected with a front lower door of a cable chamber, the three-station mechanism interlocking device is locked or unlocked with the door interlocking locking plate, the circuit breaker transmission interlocking device is locked or unlocked with the door interlocking locking plate, and the circuit breaker opening and closing interlocking device is linked with the front lower door and a circuit breaker opening and closing operating mechanism of a circuit breaker separating and closing operating mechanism respectively.

2. An interlock device for a gas-insulated switchgear cabinet according to claim 1, characterized in that: the three-station mechanism interlocking device comprises a mechanism grounding sliding plate and a linkage output assembly, the mechanism grounding sliding plate is linked with the three-station isolating switch operating mechanism, the mechanism grounding sliding plate is connected with the linkage output assembly, and the three-station isolating switch operating mechanism is locked at a grounding position through a locking mechanism.

3. An interlock device for a gas-insulated switchgear cabinet, according to claim 2, characterized in that: the linkage output assembly comprises a mechanism grounding connecting plate, a three-station interlocking shaft, a grounding sector plate, a lower door grounding interlocking shaft and a three-station door grounding locking plate, wherein the input end of the mechanism grounding connecting plate is rotatably connected with the mechanism grounding sliding plate, the output end of the mechanism grounding connecting plate is rotatably connected with one end of the three-station interlocking shaft, the other end of the three-station interlocking shaft is rotatably connected with the input end of the grounding sector plate, two ends of the door grounding interlocking shaft are fixedly connected with the output end of the grounding sector plate and the input end of the three-station door grounding locking plate respectively, the three-station door grounding locking plate is unlocked or locked with the door interlocking locking plate, and the three-station door grounding locking plate is interlocked with a front lower door.

4. An interlock device for a gas-insulated switchgear cabinet according to claim 1, characterized in that: the circuit breaker transmission interlocking device comprises a crank arm interlocking and a transmission output assembly, the crank arm interlocking is linked with a circuit breaker opening and closing operating mechanism, the crank arm interlocking is connected with the transmission output assembly, and when the circuit breaker opening and closing operating mechanism is closed, the transmission output assembly is locked or unlocked with a door interlocking locking plate.

5. An interlock device for a gas-insulated switchgear cabinet, according to claim 4, characterized in that: the transmission output assembly comprises a breaker closing connecting plate, a breaker closing interlocking shaft, a closing sector plate, a breaker lower door interlocking shaft and a closing gate grounding locking plate, one end of the breaker closing connecting plate is rotatably connected with the output end of the connecting lever interlocking, the other end of the breaker closing interlocking shaft is rotatably connected with the breaker closing interlocking shaft, the breaker closing interlocking shaft is rotatably connected with the closing sector plate, two ends of the breaker lower door interlocking shaft are fixedly connected with the output end of the closing sector plate and the input end of the closing gate grounding locking plate respectively, the breaker lower door interlocking shaft penetrates through the fourth support and is rotatably connected with the fourth support, the closing gate grounding locking plate is unlocked or locked with the closing gate grounding locking plate, and interlocking is formed between the closing gate grounding locking plate and the front lower door.

6. An interlock device for a gas-insulated switchgear cabinet according to claim 1, characterized in that: the door interlocking lock plate is provided with two rows of lock grooves, the opening direction of each lock groove faces towards the three-station door grounding lock plate of the three-station mechanism interlocking device and the closing gate grounding lock plate of the circuit breaker transmission interlocking device, and the two rows of lock grooves respectively correspond to the three-station door grounding lock plate and the closing gate grounding lock plate.

7. An interlock device for a gas-insulated switchgear cabinet according to claim 1, characterized in that: the breaker opening interlocking device comprises an opening locking assembly and an interlocking linkage assembly, wherein the opening locking assembly is linked with an opening mechanism, the opening locking assembly is linked with the interlocking linkage assembly, the interlocking linkage assembly is locked or unlocked with the opening locking assembly to control the opening operation of the opening mechanism to be locked or unlocked, the opening locking assembly comprises a fixed shaft and a baffle plate, the fixed shaft is linked with the opening mechanism, the baffle plate is fixedly arranged on the fixed shaft, and the baffle plate is linked with the interlocking linkage assembly.

8. An interlock device for a gas-insulated switchgear cabinet, according to claim 7, characterized in that: the interlocking linkage assembly comprises an interlocking plate, a first connecting plate, a second connecting plate, a guide rod and a lower door interlocking baffle, the interlocking plate is slidably connected with the fixing mechanism, the output end of the interlocking plate is fixedly provided with a supporting plate, the supporting plate is opposite to the baffle, the input end of the interlocking plate is fixedly connected with the first connecting plate, the two ends of the second connecting plate are respectively rotatably connected with the first connecting plate and the output end of the guide rod, the input end of the guide rod is fixedly connected with the lower door interlocking baffle, and the lower door interlocking baffle is fixedly connected with a front lower door.

9. An interlock device for a gas-insulated switchgear cabinet according to claim 1, characterized in that: the emergency unlocking device comprises a fixing piece, wherein the fixing piece fixedly connects the door interlocking lock plate with the front lower door and fixedly connects the lower door interlocking baffle of the breaker opening interlocking device with the front lower door.

10. An interlock device for a gas-insulated switchgear cabinet according to claim 1, characterized in that: the three-station mechanism interlocking device further comprises a fixing support assembly, the fixing support assembly is fixedly arranged on the fixing mechanism and comprises a first support, a second support, a third support and a fourth support, a mechanism grounding sliding plate is connected with the first support in a sliding mode, a reset pressure spring is arranged between the mechanism grounding sliding plate and the fixing mechanism, the second support and the third support are located at two ends of the three-station interlocking shaft in the length direction, a first spring device is arranged between the second support and the three-station interlocking shaft, a second spring device is arranged between the third support and the three-station interlocking shaft, a lower door grounding interlocking shaft penetrates through the fourth support and is connected with the fourth support in a rotating mode, the circuit breaker transmission interlocking device further comprises a transmission support, the transmission support is fixedly arranged on the fixing mechanism, a circuit breaker interlocking shaft penetrates through the transmission support and is connected with the transmission support in a sliding mode, a circuit breaker closing interlocking shaft slides up and down relative to the transmission support, an interlocking linkage assembly of the circuit breaker opening interlocking device further comprises an interlocking rack and an interlocking spring, the interlocking rack is fixedly arranged on the fixing mechanism, a guide rod is connected with the interlocking rack in a sliding mode, and the interlocking spring is respectively connected with a second connecting plate and the interlocking rack.