CN215578272U

CN215578272U - Operation interlocking device for lower door and grounding switch of air insulation switch cabinet

Info

Publication number: CN215578272U
Application number: CN202121719612.8U
Authority: CN
Inventors: 徐宏春; 刘涛; 张林松; 徐星谱; 黄光营
Original assignee: Nanyang City Xinte Electric Co ltd
Current assignee: Nanyang City Xinte Electric Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-18
Anticipated expiration: 2031-07-27

Abstract

The utility model discloses an operation interlocking device of a lower door and a grounding switch of an air insulation switch cabinet, which belongs to the technical field of power equipment and comprises an L-shaped first lock plate, a Z-shaped second lock plate and a lock rod, wherein corners of the first lock plate and the second lock plate are respectively hinged on a cabinet body of the switch cabinet, a first torsion spring is arranged on a hinged shaft of the second lock plate, the upper end of the second lock plate is matched with the grounding switch, a groove matched with the lower end of the second lock plate is formed in the upper end of the first lock plate, the outer side of the upper part of the first lock plate is connected with one end of a tension spring, the other end of the tension spring is fixed on the cabinet body of the switch cabinet, the upper end of the lock rod is hinged at the lower end of the first lock plate, a pin hole matched with an interlocking pin is formed in the lock rod, a guide piece is arranged in the switch cabinet, and a guide hole is vertically formed in the guide piece. The five-prevention locking device not only can realize the five-prevention locking function, but also can meet the interlocking operation of the lower door of the air insulation switch cabinet and the grounding switch, and is more convenient to operate and maintain.

Description

Operation interlocking device for lower door and grounding switch of air insulation switch cabinet

Technical Field

The utility model relates to the technical field of power equipment, in particular to an operation interlocking device for a lower door and a grounding switch of an air insulation switch cabinet.

Background

The 10KV high-voltage switch cabinet is an indispensable distribution device in an electric power system, and particularly relates to an electrical appliance product which is used for power generation, power transmission, power distribution, electric energy conversion and consumption of the electric power system and plays roles of on-off, control or protection and the like. However, although the conventional 10KV high-voltage switch cabinet has a five-prevention locking function, the operation of the lower door and the grounding switch of the air-insulated switch cabinet does not have an interlocking function, and the operation and maintenance are not convenient enough.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an operation interlocking device for a lower door and a grounding switch of an air insulation switch cabinet, which not only can realize a five-prevention locking function, but also can meet the interlocking operation of the lower door and the grounding switch of the air insulation switch cabinet, and is more convenient to operate and maintain.

In order to achieve the aim, the utility model provides an operation interlocking device for a lower door and an earthing switch of an air-insulated switch cabinet, which comprises an L-shaped first locking plate, a Z-shaped second locking plate and a locking rod, the corners of the first lock plate and the second lock plate are respectively hinged on the cabinet body of the switch cabinet, the hinged shaft of the second lock plate is provided with a first torsion spring, the upper end of the second locking plate is matched with the grounding switch, the upper end of the first locking plate is provided with a groove matched with the lower end of the second locking plate, the outer side of the upper part of the first lock plate is connected with one end of a tension spring, the other end of the tension spring is fixed on the cabinet body of the switch cabinet, the upper end of the lock rod is hinged to the lower end of the first lock plate, a pin hole matched with the interlocking pin on the lower door of the switch cabinet is formed in the lock rod, a guide piece is arranged in the switch cabinet, and a guide hole matched with the lock rod is vertically formed in the guide piece.

Furthermore, a door lock pin is arranged on the lower door of the switch cabinet, and a special-shaped lock hole matched with the door lock pin is arranged on the cabinet body of the switch cabinet.

Further, on the cabinet body of cubical switchboard and be located the outside of first jam plate is provided with keeps apart ground baffle, the bottom of keeping apart ground baffle is provided with the lower part limiting plate, the upper end outside of first jam plate be provided with lower part limiting plate matched with stopper.

Further, the inner side of the isolation grounding baffle is provided with an upper limiting plate matched with the upper end of the first locking plate.

Furthermore, an isolation grounding operation hole is formed in the middle of the isolation grounding baffle.

Furthermore, a first waist-shaped hole is formed in the lower end of the first lock plate, an ear plate is arranged at the upper end of the lock rod, a shaft rod is arranged on the ear plate, and the shaft rod is inserted into the first waist-shaped hole.

Further, the interlocking pin is slidably inserted into the lower door of the switch cabinet, a lower door unlocking device matched with the interlocking pin is arranged in an inner cavity of the lower door of the switch cabinet, the lower door unlocking device comprises a sliding sleeve arranged in the inner cavity of the lower door of the switch cabinet, a sliding rod is slidably arranged in the sliding sleeve, the outer end of the sliding rod is hinged to one end of a rotating plate, the middle of the rotating plate is hinged to the inside of the lower door of the switch cabinet through a first fixing shaft, a second torsion spring is arranged on the first fixing shaft, a second waist-shaped hole is formed in the other end of the rotating plate, a limiting block is arranged at the inner end of the interlocking pin, a second fixing shaft is arranged on the limiting block, and the second fixing shaft is inserted into the second waist-shaped hole.

The technical scheme of the utility model has the following beneficial effects:

1. the operation interlocking of the vacuum circuit breaker and the isolating/grounding switch realizes the sequential operation interlocking of the circuit breaker/the isolating switch/the grounding switch by the integrated circuit breaker, and has the complete reliability of preventing misoperation. The interlocking of the operation of the lower door of the switch cabinet and the grounding switch can be realized by an additionally designed interlocking device. See FIG. 2 below for an illustration, in particular: power failure maintenance: a breaking circuit breaker is used for breaking an isolating switch, a grounding switch is switched on, after the switch is switched on in place, a locking plate 2 rotates rightwards to release the locking of the locking plate 1, a lower door moves upwards, a door lock pin moves to an unlocking position of a special-shaped hole in a cabinet body along with the upper part, the lower door moves outwards, and the lower door can be overhauled after being taken down. The procedure is reversed, and the power transmission operation can be performed.

2. When the grounding switch is closed in place and the operating handle of the grounding switch is not taken out in time, the lower door of the switch cabinet can be opened at the moment to carry out in-cabinet maintenance, and as long as the isolating/grounding operating baffle is not reset, even if the isolating switch is closed in place, a specific interlocking device in the operating mechanism still locks the breaker to be closed, so that the possibility of electric shock hazard caused by the fact that the lower door is not closed and the breaker/isolating switch is closed is prevented; and the breaker can be switched on only after the lower door is closed in place and the isolation/grounding operation baffle is completely reset.

3. The lower door of the switch cabinet is provided with an emergency unlocking device, if the emergency situation can occur, the door unlocking device is pressed down, the interlocking pin is separated from the lock rod jack, emergency unlocking is achieved, the lower door is lifted upwards, and the lower door is moved away.

4. The wide-angle lens observation device is arranged at the upper right corner of a mechanism panel of the switch cabinet, and the wide-angle lens observation device is combined with a lower door observation window, so that the switch state and the operation state of other primary equipment in the cabinet can be conveniently observed.

Drawings

FIG. 1 is a schematic structural diagram of an operation interlocking device for a lower door and a grounding switch of an air-insulated switchgear according to the present invention;

FIG. 2 is a schematic structural diagram of an operating state of an interlocking device for operating a lower door and a grounding switch of an air-insulated switchgear according to the present invention;

reference numerals:

a first lock plate 1; a second locking plate 2; a lock lever 3; a first torsion spring 4; a grounding switch 5; a groove 6; a tension spring 7; an interlocking pin 8; a pin hole 9; a guide 10; a guide hole 11; a door-lock pin 12; a special-shaped lock hole 13; a lower switchgear door 14; an isolation ground baffle 15; a lower limit plate 16; an upper limit plate 17; an isolated ground access hole 18; a first kidney-shaped hole 19; an ear plate 20; a shaft 21; a sliding sleeve 22; a slide bar 23; a rotating plate 24; a first fixed shaft 25; a second torsion spring 26; a second kidney-shaped hole 27; a stop block 28; a second fixed shaft 29.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1-2 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model, are within the scope of the utility model.

As shown in fig. 1: an operation interlocking device of a lower door and a grounding switch of an air insulation switch cabinet comprises an L-shaped first lock plate, a Z-shaped second lock plate and a lock rod, the corners of the first lock plate and the second lock plate are respectively hinged on the cabinet body of the switch cabinet, the hinged shaft of the second lock plate is provided with a first torsion spring, the upper end of the second locking plate is matched with the grounding switch, the upper end of the first locking plate is provided with a groove matched with the lower end of the second locking plate, the outer side of the upper part of the first lock plate is connected with one end of a tension spring, the other end of the tension spring is fixed on the cabinet body of the switch cabinet, the upper end of the lock rod is hinged to the lower end of the first lock plate, a pin hole matched with the interlocking pin on the lower door of the switch cabinet is formed in the lock rod, a guide piece is arranged in the switch cabinet, and a guide hole matched with the lock rod is vertically formed in the guide piece.

Specifically, as shown in fig. 1, an operation interlocking device for a lower door and a ground switch of an air-insulated switchgear comprises an L-shaped first lock plate 1, a zigzag second lock plate 2 and a lock rod 3, wherein corners of the first lock plate 1 and the second lock plate 2 are respectively hinged on a cabinet body of the switchgear, a first torsion spring 4 is arranged on a hinged shaft of the second lock plate 2, the upper end of the second lock plate 2 is matched with the ground switch 5, a groove 6 matched with the lower end of the second lock plate 2 is arranged at the upper end of the first lock plate 1, the outer side of the upper part of the first lock plate 1 is connected with one end of a tension spring 7, the other end of the tension spring 7 is fixed on the cabinet body of the switchgear, the upper end of the lock rod 3 is hinged at the lower end of the first lock plate 1, a pin hole 9 matched with an interlocking pin 8 on a lower door 14 of the switchgear is arranged on the lock rod 3, a guide piece 10 is arranged in the switch cabinet, and a guide hole 11 matched with the lock rod 3 is vertically formed in the guide piece 10.

According to one embodiment of the utility model, as shown in fig. 1, a door lock pin 12 is arranged on the lower door 14 of the switch cabinet, and a special-shaped lock hole 13 matched with the door lock pin 12 is arranged on the cabinet body of the switch cabinet.

According to an embodiment of the utility model, as shown in fig. 1, an isolation grounding baffle 15 is arranged on the cabinet body of the switch cabinet and located at the outer side of the first lock plate 1, a lower limit plate 16 is arranged at the bottom of the isolation grounding baffle 15, and a limit block 17 matched with the lower limit plate 16 is arranged at the outer side of the upper end of the first lock plate 1.

According to an embodiment of the present invention, as shown in fig. 1, an upper limit plate 17 is provided at an inner side of the isolation ground guard 15 to be engaged with an upper end of the first locking plate 1.

According to an embodiment of the present invention, as shown in fig. 1, an isolated ground operation hole 18 is opened in the middle of the isolated ground baffle 15.

According to an embodiment of the present invention, as shown in fig. 1, a first kidney-shaped hole 19 is opened at a lower end of the first lock plate 1, an ear plate 20 is provided at an upper end of the lock lever 3, the ear plate 20 is provided with a shaft 21, and the shaft 21 is inserted into the first kidney-shaped hole 19.

According to one embodiment of the utility model, as shown in fig. 1, the interlocking pin 8 is slidingly inserted on the lower door 14 of the switchgear cabinet, a lower door unlocking device matched with the interlocking pin 8 is arranged in the inner cavity of the lower door 14 of the switch cabinet, the lower door unlocking device comprises a sliding sleeve 22 arranged in the inner cavity of the lower door 14 of the switch cabinet, a sliding rod 23 is arranged in the sliding sleeve 22 in a sliding way, the outer end of the sliding rod 23 is hinged with one end of a rotating plate 24, the middle part of the rotating plate 24 is hinged in the lower door 14 of the switch cabinet through a first fixed shaft 25, a second torsion spring 26 is arranged on the first fixed shaft 25, a second kidney-shaped hole 27 is arranged at the other end of the rotating plate 24, a limiting block 28 is arranged at the inner end of the interlocking pin 8, a second fixing shaft 29 is arranged on the limiting block 28, and the second fixing shaft 29 is inserted in the second kidney-shaped hole 27.

The working principle of the utility model is as follows: as shown in fig. 2, power failure repair: and a breaking circuit breaker divides an isolating switch into an earthing switch, after the earthing switch is switched on in place, the second lock plate rotates rightwards to release the locking of the first lock plate, the lower door of the switch cabinet moves upwards, the door lock pin moves to the unlocking position of the special-shaped hole on the cabinet body along with the door lock pin, the lower door of the switch cabinet moves outwards, and the lower door of the switch cabinet can be maintained after being taken down. The procedure is reversed, and the power transmission operation can be performed. When the grounding switch is switched on in place and the operating handle of the grounding switch is not taken out in time, the lower door of the switch cabinet can be opened at the moment to carry out in-cabinet maintenance, and as long as the isolating/grounding operating baffle is not reset, even if the isolating switch is switched on in place, a specific interlocking device in the operating mechanism still locks the breaker to be switched on, so that the possibility of electric shock hazard caused by the fact that the lower door of the switch cabinet is not closed and the breaker/isolating switch is switched on is prevented; and the breaker can be switched on only after the lower door of the switch cabinet is closed in place and the isolation/grounding operation baffle is completely reset. The lower door of the switch cabinet is provided with an emergency unlocking device, if the emergency situation happens, the door unlocking device can be pressed down, the interlocking pin is separated from the lock rod jack, emergency unlocking is achieved, the lower door of the switch cabinet is lifted upwards, and the lower door of the switch cabinet is removed. The five-prevention locking device not only can realize the five-prevention locking function, but also can meet the interlocking operation of the lower door of the air insulation switch cabinet and the grounding switch, and is more convenient to operate and maintain.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides an air insulated switchgear lower door and earthing switch's operation interlock which characterized in that: comprises an L-shaped first lock plate (1), a Z-shaped second lock plate (2) and a lock rod (3), wherein the corners of the first lock plate (1) and the second lock plate (2) are respectively hinged on the cabinet body of a switch cabinet, a first torsion spring (4) is arranged on a hinged shaft of the second lock plate (2), the upper end of the second lock plate (2) is matched with a grounding switch (5), a groove (6) matched with the lower end of the second lock plate (2) is formed in the upper end of the first lock plate (1), the outer side of the upper part of the first lock plate (1) is connected with one end of a tension spring (7), the other end of the tension spring (7) is fixed on the cabinet body of the switch cabinet, the upper end of the lock rod (3) is hinged at the lower end of the first lock plate (1), a pin hole (9) matched with an interlocking pin (8) on a lower door (14) of the switch cabinet is formed in the lock rod (3), a guide piece (10) is arranged in the switch cabinet, and a guide hole (11) matched with the lock rod (3) is vertically formed in the guide piece (10).

2. The operational interlock device of the lower door of the air insulated switchgear and the earthing switch according to claim 1, characterized in that: a door lock pin (12) is arranged on the lower door (14) of the switch cabinet, and a special-shaped lock hole (13) matched with the door lock pin (12) is arranged on the cabinet body of the switch cabinet.

3. The operational interlock device of the lower door of the air insulated switchgear and the earthing switch according to claim 1, characterized in that: just be located on the cabinet body of cubical switchboard the outside of first jam plate (1) is provided with keeps apart ground baffle (15), the bottom of keeping apart ground baffle (15) is provided with lower part limiting plate (16), the upper end outside of first jam plate (1) be provided with lower part limiting plate (16) matched with spacing arch.

4. The operational interlock device of the lower door of the air insulated switchgear and the earthing switch according to claim 3, characterized in that: the inner side of the isolation grounding baffle (15) is provided with an upper limiting plate (17) matched with the upper end of the first locking plate (1).

5. The operational interlock device of the lower door of the air insulated switchgear and the earthing switch according to claim 3, characterized in that: and an isolation grounding operation hole (18) is formed in the middle of the isolation grounding baffle (15).

6. The operational interlock device of the lower door of the air insulated switchgear and the earthing switch according to claim 1, characterized in that: the lock is characterized in that a first waist-shaped hole (19) is formed in the lower end of the first lock plate (1), an ear plate (20) is arranged at the upper end of the lock rod (3), the ear plate (20) is provided with a shaft rod (21), and the shaft rod (21) is inserted into the first waist-shaped hole (19).

7. The operation interlock device of the lower door of the air insulated switchgear and the earthing switch according to any one of claims 1 to 6, wherein: the interlocking pin (8) is inserted on the lower switch cabinet door (14) in a sliding manner, a lower door unlocking device matched with the interlocking pin (8) is arranged in an inner cavity of the lower switch cabinet door (14), the lower door unlocking device comprises a sliding sleeve (22) arranged in the inner cavity of the lower switch cabinet door (14), a sliding rod (23) is arranged in the sliding sleeve (22) in a sliding manner, the outer end of the sliding rod (23) is hinged with one end of a rotating plate (24), the middle part of the rotating plate (24) is hinged in the lower switch cabinet door (14) through a first fixing shaft (25), a second torsion spring (26) is arranged on the first fixing shaft (25), a second waist-shaped hole (27) is formed in the other end of the rotating plate (24), a limiting block (28) is arranged at the inner end of the interlocking pin (8), and a second fixing shaft (29) is arranged on the limiting block (28), the second fixing shaft (29) is inserted in the second kidney-shaped hole (27).