CN117317872B

CN117317872B - Medium-voltage switchgear

Info

Publication number: CN117317872B
Application number: CN202311623898.3A
Authority: CN
Inventors: 吴小祥; 张晓峰; 戴健; 顾培强; 韩锋; 励军; 沈涛; 陈煜�; 朱冰怡
Original assignee: Wujiang Jintongli Electrical Appliance Complete Set Co ltd
Current assignee: Wujiang Jintongli Electrical Appliance Complete Set Co ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-02-02
Anticipated expiration: 2043-11-30
Also published as: CN117317872A

Abstract

The application relates to the technical field of power distribution devices, in particular to a medium-voltage switch cabinet. The medium voltage switchgear includes: the cable chamber is hinged with a rear door, the inner side of the rear door is provided with a interlocking plate, the cable chamber is internally provided with a grounding switch and an interlocking mechanism connected with the grounding switch, the interlocking mechanism comprises a reverse locking support frame, a collision plate is arranged on the reverse locking support frame in a penetrating way, a linkage rod is fixed on the collision plate, two sides of the linkage rod are respectively fixedly connected with a blocking piece extending towards the rear door and penetrating through the reverse locking support frame and an L-shaped guide support extending towards the interior of the cable chamber and penetrating through the reverse locking support frame, the reverse locking support frame is also provided with a fixed limiting support, and the fixed limiting support is used for fixing the collision plate and limiting the moving range of the collision plate; the outside of the anti-locking support frame is provided with an interlocking piece matched with the blocking piece and the interlocking plate, and the interlocking piece is connected with the grounding switch through an interlocking shaft. The medium-voltage switch cabinet is simple in structure, good in stability and high in safety.

Description

Medium-voltage switchgear

Technical Field

The application relates to the technical field of power distribution, in particular to a medium-voltage switch cabinet.

Background

The interlocking of the medium-voltage switch cabinet is an important measure for ensuring the safe operation of a power network, ensuring the safety of equipment and personnel and preventing misoperation. The purpose of the interlocking is to enable the grounding switch operating mechanism of the switch cabinet to form interlocking with the rear door, so that the grounding switch can be separated and combined only after the rear door is closed, and the rear door can not be opened when the grounding switch is in a separated state.

When the interlocking is realized in the medium-voltage switch cabinet in the prior art, the structure is complex, and the structure for realizing the interlocking is easy to loosen and has poor stability because the stress is unreasonable when the interlocking is realized.

Disclosure of Invention

In order to solve the defect that prior art exists, the aim at of this application provides a medium voltage switchgear, simple structure, stability is high.

To achieve the above object, the present application provides a medium voltage switchgear, including:

the cable chamber is hinged with a rear door, an interlocking plate is arranged on the inner side of the rear door, a grounding switch and an interlocking mechanism connected with the grounding switch are arranged in the cable chamber, and the interlocking mechanism is used for locking the closed rear door when the grounding switch is separated from the door and unlocking the locked rear door when the grounding switch is closed;

the interlocking mechanism comprises a reverse locking support frame, a collision plate is arranged on the reverse locking support frame in a penetrating manner, one end of the collision plate extends towards the rear door, the other end of the collision plate extends towards the inside of the cable chamber, a linkage rod is fixed on the collision plate, a blocking piece extending towards the rear door and penetrating through the reverse locking support frame and an L-shaped guide support extending towards the inside of the cable chamber and penetrating through the reverse locking support frame are fixedly connected to two sides of the linkage rod respectively, and the reverse locking support frame is also provided with a fixed limiting support which is used for fixing the collision plate and limiting the moving range of the collision plate; the outside of anti-locking support frame is provided with the interlocking piece that cooperates with the blocking piece and interlock board, the interlocking piece pass through the interlocking axle with earthing switch connects.

Furthermore, the collision plate is sleeved with a pressure spring.

Further, the earthing switch includes the earthing switch mounting bracket, be provided with the earthing switch main shaft on the earthing switch mounting bracket, the one end of earthing switch main shaft is provided with the rotating plate, the rotating plate is connected with the rotation connecting rod, the rotation connecting rod with set up the epaxial clutch fixed connection of interlocking, the clutch is including the cover to be established clutch sleeve on the interlocking axle and set up the clutch extension board that is connected with the rotation connecting rod on the clutch sleeve.

Further, the other end of the grounding switch main shaft is provided with a spring driving plate, a spring supporting plate is arranged on the spring driving plate, a guide plate is arranged in the spring supporting plate in a penetrating mode, a through groove is formed in the guide plate, an upper connecting pin located in the through groove is arranged on the spring driving plate, and a lower connecting pin for fixing the guide plate is arranged on the grounding switch mounting frame.

Further, a plurality of contact supporting plates are arranged on the grounding switch main shaft at intervals, a movable contact knife supporting tube is arranged on the contact supporting plate in a penetrating mode, movable knives are arranged on the movable contact knife supporting tube at two sides of the contact supporting plate, and a supporting bent plate used for supporting the movable knives is arranged on the movable contact knife supporting tube.

Further, an insulating sleeve is sleeved on the interlocking shaft.

Further, the medium voltage switchgear still includes:

the handcart room, be provided with earthing switch operating device in the handcart room, earthing switch operating device includes:

the fixed support is provided with an operation shaft which is fixedly connected with the interlocking shaft through a shaft connecting rod, the operation shaft is also provided with a first fan-shaped sheet matched with a stop block on the fixed support and a third fan-shaped sheet used for limiting the movement range of the movable support, and the fixed support is also provided with a sliding guide rod;

and the movable support is arranged on the other side of the fixed support relative to the operation shaft along the extending direction of the sliding guide rod and used for blocking and releasing the position of the fixed support for inserting the operation handle.

Further, a stop sleeve and a limiting sleeve are further arranged on the operation shaft.

Further, the grounding switch operating mechanism further includes:

the electromagnet mounting plate is provided with a locking electromagnet and a travel switch, the locking electromagnet and the travel switch are used for limiting the movement of the movable support, and the control end of the travel switch is provided with a secondary switch driving plate matched with a second fan-shaped piece sleeved on the operation shaft.

Further, the interlocking plate is fixed on the rear door through a self-locking nut and an emergency unlocking bolt.

The medium-voltage switch cabinet has the advantages that the structure of the interlocking mechanism is simple, the stress is reasonable during interlocking, the stability is good, and the safety is high.

The interlocking mechanism, the grounding switch and the grounding switch operating mechanism of the medium-voltage switch cabinet are mutually matched in a cooperative mode, safe operation of the medium-voltage switch cabinet is guaranteed, equipment and personal safety are guaranteed, and potential safety hazards caused by misoperation of personnel are avoided.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and explain the application and do not limit it. In the drawings:

fig. 1 is a schematic structural diagram of a medium voltage switchgear of embodiment 1 of the present application;

FIG. 2 is a schematic diagram of the internal structure of a medium voltage switchgear;

FIG. 3 is a schematic view of the structure of the rear door;

FIG. 4 is an enlarged schematic view of FIG. 3 at S;

FIG. 5 is a schematic view of the other view of FIG. 4;

FIG. 6 is a schematic view of the structure of the reverse locking support;

FIG. 7 is a schematic view of a mechanism for securing a spacing bracket;

FIG. 8 is a schematic structural view of a crash panel;

FIG. 9 is a schematic view of the structure of an interlocking sheet;

FIG. 10 is a schematic diagram of a grounding switch;

FIG. 11 is a schematic view of the structure of the grounding switch operating mechanism;

fig. 12 is a schematic view of the grounding switch operating mechanism from another perspective.

Description of the drawings: 1-cable compartment, 2-handcart compartment, 3-rear door, 31-window, 4-grounding switch, 5-grounding switch operating mechanism, 6-interlocking mechanism, 7-interlocking plate, 8-shaft connecting rod, 9-interlocking shaft, 10-insulating sleeve, 41-grounding switch mounting bracket, 42-grounding switch main shaft, 43-spring driving plate, 44-rotating plate, 45-rotating connecting rod, 46-clutch extension plate, 47-clutch sleeve, 48-contact supporting plate, 49-supporting bent plate, 410-movable contact supporting tube, 411-movable knife, 412-guiding plate, 413-lower connecting pin, 414-spring supporting plate, 415-upper connecting pin, 51-electromagnet mounting plate, 52-travel switch, 53-locking electromagnet, 54-movable bracket, 55-sliding guiding rod, 56-handle, 57-fixed support, 58-operation indicating plate, 59-first fan-shaped plate, 510-second fan-shaped plate, 511-secondary switch driving plate, 512-stop sleeve, 513-limiting sleeve, 514-operation shaft, 515-516, third fan-shaped supporting plate, 61-back supporting plate, 415-upper connecting pin, 51-electromagnet mounting plate, 52-travel switch, 53-locking electromagnet, 54-movable bracket, 55-sliding guiding bracket, 56-handle, 57-fixed support bracket, 58-fixed support bracket, 59-shaped locking bracket, and locking bracket.

Detailed Description

Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present application are shown in the drawings, it is to be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and examples of the present application are for illustrative purposes only and are not intended to limit the scope of the present application.

It should be understood that the various steps recited in the method embodiments of the present application may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present application is not limited in this respect.

The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below.

It should be noted that references to "one" or "a plurality" in this application are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be interpreted as "one or more" unless the context clearly indicates otherwise. "plurality" is understood to mean two or more.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

Example 1

An embodiment of the application provides a medium voltage switchgear, simple structure, stability is high. The medium voltage switchgear of the present application will be described in detail with reference to fig. 1 to 12:

a medium voltage switchgear comprising:

the cable chamber 1 is hinged with the rear door 3, an interlocking plate 7 is arranged on the inner side of the rear door 3, a grounding switch 4 and an interlocking mechanism 6 connected with the grounding switch are arranged in the cable chamber 1, and the interlocking mechanism 6 is used for locking the closed rear door 3 by matching with the interlocking plate 7 when the grounding switch 4 is disconnected and unlocking the locked rear door 3 when the grounding switch 4 is closed;

the interlocking mechanism 6 comprises a reverse locking support frame 61, a collision plate 62 is arranged on the reverse locking support frame 61 in a penetrating way, one end of the collision plate 62 extends towards the rear door 3, the other end of the collision plate 62 extends towards the inside of the cable chamber 1, a linkage rod 65 is fixed on the collision plate 62, two sides of the linkage rod 65 are respectively fixedly connected with a blocking piece 66 which extends towards the rear door 3 and passes through the reverse locking support frame 61 and an L-shaped guide bracket 68 which extends towards the inside of the cable chamber 1 and passes through the reverse locking support frame 61, the reverse locking support frame 61 is also provided with a fixed limiting bracket 64, and the fixed limiting bracket 64 is used for fixing the collision plate 62 and limiting the moving range of the collision plate 62; the outside of the anti-lock support 61 is provided with an interlocking piece 67 that cooperates with the blocking piece 66 and the interlocking plate 7, and the interlocking piece 67 is connected to the ground switch 4 through the interlocking shaft 9.

In the present embodiment, the interlock plate 7 is fixed to the rear door 3 by a self-locking nut 32 and an emergency unlocking bolt 33. When the rear door 3 needs to be opened for maintenance, the grounding switch 4 needs to be closed for operation, and if the grounding switch 4 fails and cannot be closed, the emergency unlocking bolt 33 on the rear door needs to be detached for opening the rear door 3 for maintenance of internal faults, and the detached emergency unlocking bolt is restored after the faults are removed.

In the present embodiment, the rear door 3 is provided with a window 31 for facilitating the observation of the situation in the switchgear by the worker.

It will be appreciated that the length and the movement range of the collision plate 62, the length of the blocking member 66, the position of the linkage rod 65 on the collision plate 62, the position of the interlocking plate 7, the position and the shape length of the interlocking piece 67 need to be matched with each other, so as to ensure that when the rear door 3 is closed, the door plate of the rear door 3 collides with the collision plate 62, the collision plate 62 moves towards the direction inside the cable chamber 1, the blocking member 66 is driven to move towards the direction inside the cable chamber 1, the blocking member 66 is further driven to not block the rotation of the interlocking piece 67, and then the interlocking piece 67 is driven to rotate to the position of the interlocking plate 7 when the grounding switch 4 is disconnected, and the interlocking plate 7 is matched to lock the rear door 3.

Referring to fig. 8, the collision plate 62 is in a cross shape, a section of the collision plate near the cable room 1 is sleeved with a compression spring 63, the stress direction of the collision plate is perpendicular to the direction of the rear door towards the inside of the cable room 1, the collision plate is stressed scientifically, and the collision plate can move towards the direction of the inside of the cable room 1 along with the closing of the rear door when the rear door is closed.

Referring to fig. 9, the interlocking piece 67 has a wedge shape.

In the present embodiment, an insulating sleeve 10 is fitted over the interlocking shaft 9 located in the cable chamber 1.

Referring to fig. 10, the ground switch 4 includes a ground switch mounting bracket 41, a ground switch main shaft 42 is provided on the ground switch mounting bracket 41, one end of the ground switch main shaft 42 is provided with a rotating plate 44, the rotating plate 44 is connected with a rotating link 45, the rotating link 45 is fixedly connected with a clutch provided on the interlocking shaft 9, and the clutch includes a clutch sleeve 47 sleeved on the interlocking shaft 9 and a clutch extension plate 46 provided on the clutch sleeve 47 and connected with the rotating link 45.

The other end of the grounding switch main shaft 42 is provided with a spring driving plate 43, a spring supporting plate 414 is arranged on the spring driving plate 43, a guide plate 412 is arranged in the spring supporting plate 414 in a penetrating manner, a through groove is formed in the guide plate 412, an upper connecting pin 415 positioned in the through groove is arranged on the spring driving plate 43, and a lower connecting pin 413 for fixing the guide plate 412 is arranged on the grounding switch mounting frame 41.

A plurality of contact support plates 48 are arranged on the grounding switch main shaft 42 at intervals, a movable contact knife support tube 410 is arranged on the contact support plate 48 in a penetrating manner, movable knives 411 are arranged on the movable contact knife support tube 410 on two sides of the contact support plate 48, and a support bent plate 49 for supporting the movable knives 411 is arranged on the movable contact knife support tube 410.

The spring driving plate 43, the rotating plate 44 and the clutch extending plate 46 are provided in pairs,

in the present embodiment, the contact support plate 48 is provided with three.

In other embodiments, the number of contact support plates 48 is adaptively set as desired.

In this embodiment, the medium voltage switchgear further includes:

the handcart room 2 is provided with a grounding switch operating mechanism 5.

Referring to fig. 11 to 12, the ground switch operating mechanism 5 includes:

the fixed support 57, the fixed support 57 is provided with an operation shaft 514, the operation shaft 514 is fixedly connected with the interlocking shaft 9 through a shaft connecting rod 8, the operation shaft 514 is also provided with a first fan-shaped sheet 59 matched with a stop block 515 on the fixed support 57 and a third fan-shaped sheet 516 used for limiting the moving range of the moving support 54, and the moving support 54 is also provided with a sliding guide rod 55;

and a moving bracket 54 provided on the other side of the fixed support 57 with respect to the operation shaft in the extending direction of the slide guide bar 55 on the moving bracket 54 for blocking and releasing the position of the fixed support 57 for inserting the operation handle.

In the present embodiment, the operation shaft 514 is further provided with a stopper 512 and a stopper 513.

In the present embodiment, the ground switch operating mechanism 5 further includes:

the electromagnet mounting plate 51, the electromagnet mounting plate 51 is provided with a latching electromagnet 53 and a travel switch 52 for limiting the movement of the moving bracket 54, and the control end of the travel switch 52 is provided with a secondary switch driving plate 511 matched with a second fan-shaped piece 510 sleeved on the operation shaft 514.

In the present embodiment, two slide guide rods 55 are provided.

In the present embodiment, an operation indication board 58 is further provided on the fixing support 57 to prompt an operator how to operate the ground switch 4.

In the present embodiment, the moving bracket 54 is provided with a handle 56 for facilitating the movement of the moving bracket by an operator.

The working process of the embodiment of the application is as follows: when the rear door 3 is closed, the door plate of the rear door 3 collides with the collision plate 62, so that the collision plate 62 moves towards the direction inside the cable chamber 1, and then the linkage rod 65 and the blocking piece 66 are driven to move towards the direction inside the cable chamber 1, and then the blocking piece 66 does not block the rotation of the linkage locking piece 67 any more, and then when the grounding switch operating mechanism 5 is used for controlling the grounding switch 4 to open, the linkage locking piece 67 is driven to rotate to the position of the interlocking plate 7, and the interlocking plate 7 is matched with the linkage rod to lock the rear door 3. When the grounding switch 4 needs to be operated, the movable support 54 is moved to the bottom, the position of the operation handle is leaked, the operation handle is inserted, the operation handle controls the operation shaft 514 to rotate, because the first fan-shaped piece is provided with a 90-degree notch and the fixed support 57 is provided with the stop block 515, the whole operation shaft 514 can only rotate 90 degrees, when the operation shaft 514 rotates to the corresponding closing position on the operation indication plate 58, the grounding switch 4 is closed, the third fan-shaped piece can stop the movable support 54 to move upwards, the second fan-shaped piece 510 is lifted, the secondary switch driving plate 511 is not pressed, the travel switch 52 is in a three-opening and two-closing state, when the operation handle controls the operation shaft 514 to rotate to the corresponding opening position on the operation indication plate 58, the grounding switch 4 is indicated to be opened, when the third fan-shaped piece 516 rotates, the movable support 54 can move up and down freely, and the second fan-shaped piece 510 presses the secondary switch driving plate 511 downwards, and the travel switch 52 is in a two-opening and three-closing state. When the circuit breaker is in the working position, the locking electromagnet 53 extends out of the electric iron core to prevent the movable bracket 54 from moving downwards, and the grounding switch 4 cannot be operated at the moment; when the circuit breaker is in the open position, the latching electromagnet 53 contracts the plunger, and the moving carriage 54 moves downward, at which point the grounding switch can be operated.

The above description is only illustrative of some of the embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the disclosure. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present application. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

Claims

1. A medium voltage switchgear comprising:

the interlocking mechanism comprises a reverse locking support frame, a collision plate is arranged on the reverse locking support frame in a penetrating manner, one end of the collision plate extends towards the rear door, the other end of the collision plate extends towards the inside of the cable chamber, a linkage rod is fixed on the collision plate, a blocking piece extending towards the rear door and penetrating through the reverse locking support frame and an L-shaped guide support extending towards the inside of the cable chamber and penetrating through the reverse locking support frame are fixedly connected to two sides of the linkage rod respectively, and the reverse locking support frame is also provided with a fixed limiting support which is used for fixing the collision plate and limiting the moving range of the collision plate; an interlocking piece matched with the blocking piece and the interlocking plate is arranged on the outer side of the anti-locking support frame, and the interlocking piece is connected with the grounding switch through an interlocking shaft;

the grounding switch comprises a grounding switch mounting frame, a grounding switch main shaft is arranged on the grounding switch mounting frame, a rotating plate is arranged at one end of the grounding switch main shaft, the rotating plate is connected with a rotating connecting rod, the rotating connecting rod is fixedly connected with a clutch arranged on the interlocking shaft, and the clutch comprises a clutch sleeve sleeved on the interlocking shaft and a clutch extension plate arranged on the clutch sleeve and connected with the rotating connecting rod; the other end of the grounding switch main shaft is provided with a spring driving plate, a spring supporting plate is arranged on the spring driving plate, a guide plate is arranged in the spring supporting plate in a penetrating manner, a through groove is formed in the guide plate, an upper connecting pin positioned in the through groove is arranged on the spring driving plate, and a lower connecting pin for fixing the guide plate is arranged on the grounding switch mounting frame; a plurality of contact supporting plates are arranged on the grounding switch main shaft at intervals, a movable contact knife supporting tube is arranged on the contact supporting plate in a penetrating mode, movable knives are arranged on the movable contact knife supporting tube at two sides of the contact supporting plate, and a supporting bent plate for supporting the movable knives is arranged on the movable contact knife supporting tube;

2. The medium voltage switchgear of claim 1 wherein said crash panel is provided with compression springs.

3. The medium voltage switchgear as claimed in claim 1, wherein the interlocking shaft is provided with an insulating sleeve.

4. The medium voltage switchgear according to claim 1, characterized in that the operating shaft is further provided with a stop sleeve and a stop sleeve.

5. The medium voltage switchgear according to claim 1, characterized in that the earthing switch operating mechanism further comprises:

6. The medium voltage switchgear according to claim 1, characterized in that the interlocking plate is fixed to the rear door by means of a self-locking nut and an emergency unlocking bolt.