CN221101909U - Grounding interlocking device and switch cabinet with same - Google Patents

Abstract

The utility model provides a grounding interlocking device and a switch cabinet with the same. The ground interlock device includes: the grounding knife assembly comprises a grounding fixed contact and a moving contact with a notch; a connecting rod assembly comprising first and second connecting rods connected with each other; the lock assembly comprises a first locking part, a second locking part and an elastic part, wherein the elastic part is used for pushing the second connecting rod to move towards the panel; when the movable contact rotates to a locking position, the elastic part pushes the second connecting rod to move towards the panel, the second connecting rod pushes the second locking part to move to an unlocking state of the panel, and the first connecting rod is driven to move towards the notch, so that the first connecting rod extends into the notch and is in limit fit with the notch; when the panel is closed, the first locking part pushes the second connecting rod to move away from the panel, and the second connecting rod drives the first connecting rod to move away from the notch so that the first connecting rod can withdraw from the notch. The utility model solves the problem of poor reliability of the interlocking device of the rear door of the switch cabinet in the prior art.

Description

Grounding interlocking device and switch cabinet with same

Technical Field

The utility model relates to the technical field of medium-high voltage electrical switching equipment, in particular to a grounding interlocking device and a switch cabinet with the same.

Background

At present, aiming at the middle-high voltage armoured removable metal closed switch cabinet, the requirement on safety protection is higher and higher, and the switch cabinet in the prior art must meet the requirement that a rear door is closed to operate a grounding switch so as to prevent operators from wrongly rushing into a live interval.

In the prior art, the following two ways are available for the interlocking device of the rear door of the switch cabinet to realize the functions:

1. The grounding switch operation shaft is directly extended to the rear of the cabinet and interlocked with the rear lower door, the requirement of five-prevention is met when the grounding switch operation shaft is used as a switch cabinet, meanwhile, the electric gaps corresponding to different voltage grades are also required, the grounding switch can be operated only when the rear door is closed through the operation shaft, the safety distance of the grounding switch operation shaft to the C-phase copper bar is only about 100mm, according to national and electric industry standard regulations, the 10KV system is provided, and under normal use conditions, the electric safety distance between the phases and relative to the ground is at least not less than 125mm, and obviously does not meet the standard.

2. The second half section of the grounding switch operating shaft is directly extended to the rear of the cabinet by the insulating rod to be interlocked with the rear door of the cabinet, and although the mode can meet the insulation requirement and the use requirement of an electrical safety distance, the cost is high, and the insulating rod is broken when an operator operates by mistake, so that the reliability is poor.

Disclosure of utility model

The utility model mainly aims to provide a grounding interlocking device and a switch cabinet with the grounding interlocking device, so as to solve the problems of poor reliability and high cost of a rear door interlocking device of the switch cabinet in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a ground interlock device comprising: the grounding knife assembly comprises a grounding fixed contact and a moving contact, the moving contact is rotatably arranged on a cabinet body of the switch cabinet, and a rotating shaft of the moving contact is provided with a notch; the connecting rod assembly comprises a first connecting rod and a second connecting rod which are connected with each other, and an included angle is formed between the first connecting rod and the second connecting rod; when the movable contact rotates to a locking position, the movable contact is switched on with the grounding fixed contact, and the notch faces the first connecting rod; the lock assembly comprises a first locking part, a second locking part and an elastic part, wherein the first locking part is arranged on a panel of the switch cabinet, the second locking part is movably arranged, the elastic part is used for pushing a second connecting rod to move towards the panel, and the second connecting rod is used for pushing the second locking part to move so as to be separated from the first locking part; the second locking part has a panel locking state of being mutually locked with the first locking part and a panel unlocking state of being mutually separated from the first locking part; when the panel needs to be opened, the movable contact is rotated to a locking position, the notch faces the first connecting rod, the elastic part pushes the second connecting rod to move towards the panel, the second connecting rod pushes the second locking part to move to an unlocking state of the panel, and the first connecting rod is driven to move towards the notch, so that the end part of the first connecting rod, which is far away from the second connecting rod, extends into the notch and is in limit fit with the notch, and the locking of the panel to the grounding knife assembly is realized; when the panel is closed, the first locking part pushes the second connecting rod to move away from the panel, and the second connecting rod drives the first connecting rod to move away from the notch, so that the end part of the first connecting rod withdraws from the notch, and the panel is locked by the grounding knife assembly.

Further, the connecting rod assembly further includes: the third connecting rod is rotatably arranged on the cabinet body and comprises a first rod body and a second rod body which are in a V shape, the first rod body is connected with the first connecting rod, and the second rod body is connected with the second connecting rod.

Further, the first connecting rod comprises a third rod body and a fourth rod body which are connected in a pivoting manner, the fourth rod body is connected with the first rod body in a pivoting manner, the third rod body is arranged in a lifting manner along the vertical direction, an included angle B is formed between the third rod body and the fourth rod body, and an included angle C is formed between the fourth rod body and the first rod body.

Further, the second connecting rod comprises a fifth rod body and a sixth rod body which are connected in a pivoting manner, the sixth rod body is connected with the second rod body in a pivoting manner, the fifth rod body is slidably arranged along the horizontal direction, an included angle D is formed between the third rod body and the fourth rod body, and an included angle E is formed between the sixth rod body and the second rod body.

Further, the second locking part is provided with a hook body, the first locking part is provided with a first concave part, and the hook body can extend into the first concave part and limit stop with the first concave part so as to enable the second locking part to be in a panel locking state.

Further, the second locking portion further has a pushing portion connected with the hook body, the fifth rod body has a stop portion, and the lock assembly further includes: the bracket is arranged on the cabinet body, and the second locking part is rotatably arranged on the bracket; the fifth rod body is arranged on the bracket in a penetrating way, the elastic part is a spring, the spring is sleeved on the fifth rod body, and two ends of the spring are respectively limited and stopped by the bracket and the stopping part; the fifth rod body is also provided with a second concave part, and the pushing part is positioned in the second concave part when the second locking part is in the panel locking state; when the fifth rod body moves towards the panel, the fifth rod body pushes the pushing part to rotate and withdraw from the second concave part, so that the hook body is driven by the pushing part to rotate until the hook body is out of engagement with the first concave part.

Further, the connecting rod assembly further includes: at least two guide structures, each guide structure sets up on the cabinet body, and the third body of rod slidably wears to establish on at least one guide structure, and the fifth body of rod slidably wears to establish on at least another guide structure.

Further, the moving contact includes: the contact structure is provided with a contact part and a sleeve which are connected with each other; the rotating shaft is rotationally connected with the cabinet body, the sleeve is sleeved on the rotating shaft to be rotationally connected with the cabinet body, the sleeve is provided with a notch, one side of the notch penetrates through the outer surface of the sleeve along the radial direction of the sleeve, and the other side of the notch is arranged at intervals with the rotating shaft.

Further, the panel has a through hole, and the lock assembly further includes: the fixing structure is arranged on the outer surface of the panel, at least part of the first locking part is arranged in the through hole in a penetrating way, and the first concave part is positioned on the inner side of the panel; the fastener is penetrated in the fixed structure and the first locking part to connect the fixed structure and the first locking part; the cover body can be arranged on the fixed structure in a turnover way so as to be used for shielding or avoiding the fastening head of the fastening piece.

According to another aspect of the utility model, there is provided a switchgear comprising the above-described ground interlock.

By applying the technical scheme of the utility model, the grounding interlocking device comprises a grounding knife assembly, a connecting rod assembly and a lock assembly, wherein the grounding knife assembly comprises a grounding fixed contact and a moving contact, the moving contact is rotatably arranged on a cabinet body of the switch cabinet, and is switched on with the grounding fixed contact when the moving contact rotates to a locking position, and the moving contact is provided with a notch. The connecting rod assembly comprises a first connecting rod and a second connecting rod which are connected with each other, and an included angle is formed between the first connecting rod and the second connecting rod; the lock assembly comprises a first locking part, a second locking part and an elastic part, wherein the first locking part is arranged on a panel of the switch cabinet, the second locking part is movably arranged, the elastic part is used for pushing a second connecting rod to move towards the panel, and the second connecting rod is used for pushing the second locking part to move so as to be separated from the first locking part. Wherein the second locking portion has a panel locking state in which the second locking portion is locked with each other and a panel unlocking state in which the second locking portion is separated from the first locking portion. Thus, when the panel is closed on the cabinet body, the elastic part is in a compressed state and has elastic potential energy. When the panel is required to be opened, a worker firstly operates the moving contact to rotate to a locking position, then unscrews a fastener on the panel, the notch faces the first connecting rod, the elastic part releases elastic potential energy to push the second connecting rod to move towards the panel, the second connecting rod pushes the second locking part to move to an unlocking state of the panel, and drives the first connecting rod to move towards the notch, so that the end part of the first connecting rod, which is far away from the second connecting rod, stretches into the notch and is in limit fit with the notch, and at the moment, the moving contact cannot rotate; when the panel is closed by a worker, the first locking part pushes the second connecting rod to move away from the panel, the second connecting rod drives the first connecting rod to move away from the notch, so that the end part of the first connecting rod withdraws from the notch, and the moving contact can rotate freely.

Compared with the prior art that the grounding switch operation shaft is directly extended to the rear of the cabinet and is interlocked with the rear lower door, the grounding switch operation shaft is connected with the lock assembly through the connecting rod assembly, so that the reliability of locking and unlocking the grounding static contact is improved, the structure of the grounding interlocking device is simpler, the grounding switch operation shaft is easy to process and realize, the processing cost and the processing difficulty of the grounding interlocking device are reduced, and the problems of poor reliability and high cost of the rear door interlocking device of the switch cabinet in the prior art are solved. Meanwhile, the grounding interlocking device moves the connecting rod assembly and the lockset assembly to the bottom of the switch cabinet, so that the assemblies are far away from the branch row, and the safety and the electrical reliability of the cabinet body are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic view of the structure of a panel of an embodiment of a ground interlock device according to the present utility model when closed on a cabinet;

FIG. 2 shows an enlarged view of the ground interlock device of FIG. 1 at G;

FIG. 3 shows a schematic view of the structure of an embodiment of a ground interlock device according to the present utility model when the panel is opened;

fig. 4 shows an enlarged view of the ground interlock device of fig. 3 at H.

Wherein the above figures include the following reference numerals:

10. a grounding knife assembly; 11. a grounding static contact; 12. a moving contact; 121. a notch; 122. a rotating shaft; 123. a contact structure;

21. A cabinet body; 22. a panel;

30. A connecting rod assembly; 31. a first link; 311. a third rod body; 312. a fourth rod body; 32. a second link; 321. a fifth rod body; 3211. a stop portion; 3212. a second concave portion; 322. a sixth rod body; 33. a third link; 331. a first rod body; 332. a second rod body; 34. a guide structure;

40. A lock assembly; 41. a first locking portion; 411. a first concave portion; 42. a second locking portion; 421. a hook body; 422. a pushing part; 43. an elastic part; 44. a bracket; 45. a fixed structure; 46. a fastener; 47. and a cover body.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

In order to solve the problems of poor reliability and high cost of a rear door interlocking device of a switch cabinet in the prior art, the application provides a grounding interlocking device and the switch cabinet with the same.

As shown in fig. 1 to 4, the ground interlock device includes a ground blade assembly 10, a link assembly 30, and a lock assembly 40. The grounding knife assembly 10 comprises a grounding fixed contact 11 and a moving contact 12, wherein the moving contact 12 is rotatably arranged on a cabinet body 21 of the switch cabinet, and a rotating shaft 122 of the moving contact 12 is provided with a notch 121. The connecting rod assembly 30 comprises a first connecting rod 31 and a second connecting rod 32 which are connected with each other, an included angle is formed between the first connecting rod 31 and the second connecting rod 32, when the moving contact 12 rotates to a locking position, the moving contact is switched on with the grounding static contact 11, and the notch 121 is arranged towards the first connecting rod 31. The lock assembly 40 includes a first locking portion 41, a second locking portion 42, and an elastic portion 43, wherein the first locking portion 41 is disposed on the panel 22 of the switch cabinet, the second locking portion 42 is movably disposed, the elastic portion 43 is used for pushing the second link 32 to move toward the panel 22, and the second link 32 is used for pushing the second locking portion 42 to move so as to be separated from the first locking portion 41; the second locking portion 42 has a locked state of the panel 22 mutually locked with the first locking portion 41 and an unlocked state of the panel 22 mutually separated from the first locking portion 41. When the panel 22 needs to be opened, the movable contact 12 is turned to the locking position, the notch 121 faces the first link 31, the elastic portion 43 pushes the second link 32 to move towards the panel 22, the second link 32 pushes the second locking portion 42 to move to the panel 22 in the unlocking state, and drives the first link 31 to move towards the notch 121, so that the end portion of the first link 31 away from the second link 32 extends into the notch 121 and is in limit fit with the notch 121, thereby locking the grounding knife assembly 10 by the panel 22. When the panel 22 is closed, the first locking portion 41 pushes the second connecting rod 32 to move away from the panel 22, and the second connecting rod 32 drives the first connecting rod 31 to move away from the notch 121, so that the end of the first connecting rod 31 withdraws from the notch 121, and the locking of the grounding knife assembly 10 to the panel 22 is realized.

With the technical solution of the present embodiment, when the panel 22 is closed on the cabinet 21, the elastic portion 43 is in a compressed state and has elastic potential energy. When the panel 22 needs to be opened, a worker firstly operates the movable contact 12 to rotate to a locking position, unscrews a fastener on the panel 22, and the notch 121 faces the first connecting rod 31, the elastic part 43 releases elastic potential energy to push the second connecting rod 32 to move towards the panel 22, the second connecting rod 32 pushes the second locking part 42 to move to a panel unlocking state and drives the first connecting rod 31 to move towards the notch 121, so that the end part of the first connecting rod 31 away from the second connecting rod 32 stretches into the notch 121 and is in limit fit with the notch 121, and the movable contact 12 cannot rotate at the moment; when the worker closes the panel 22, the first locking portion 41 pushes the second link 32 to move away from the panel 22, and the second link 32 drives the first link 31 to move away from the notch 121, so that the end portion of the first link 31 is withdrawn from the notch 121, and the moving contact 12 can rotate freely.

Compared with the prior art that the grounding switch operation shaft directly extends to the rear of the cabinet and is interlocked with the rear lower door, the relation between the lock assembly 40 and the grounding knife assembly 10 is connected through the connecting rod assembly 30 in the embodiment, so that the locking reliability and the unlocking reliability of the grounding static contact 11 are improved, the structure of the grounding interlocking device is simpler, the grounding interlocking device is easy to process and realize, the processing cost and the processing difficulty of the grounding interlocking device are reduced, and the problems of poor reliability and high cost of the rear door interlocking device of the switch cabinet in the prior art are solved. Meanwhile, the grounding interlocking device in the embodiment moves the connecting rod assembly and the lockset assembly to the bottom of the switch cabinet, so that the assemblies are far away from the branch row, and the safety and the electrical reliability of the cabinet body are improved.

In this embodiment, the ground interlock device can meet insulation requirements and electrical safety distance usage requirements. Specifically, the grounding interlocking device is far away from the busbar, and can meet the forced technical requirement of the air insulation distance of more than or equal to 125 mm.

As shown in fig. 1 and 3, the movable contact 12 includes a contact structure 123 and a rotating shaft 122. The rotating shaft 122 is fixedly connected with the contact structure 123 and rotates synchronously, the rotating shaft 122 is provided with a notch 121, and the notch 121 can be driven to rotate synchronously in the synchronous rotation process of the rotating shaft 122 and the contact structure 123.

In this embodiment, the opening direction of the notch 121 is 90 ° from the contact structure 123.

As shown in fig. 1 and 3, the link assembly 30 further includes a third link 33, the third link 33 is rotatably disposed on the cabinet 21, the third link 33 includes a first rod 331 and a second rod 332 disposed in a V shape, the first rod 331 is connected to the first link 31, and the second rod 332 is connected to the second link 32. Wherein the included angle a is smaller than 90 °, and the pivot axis of the third link 33 is located below the first link 31 and the second link 32. In this way, the first connecting rod 31 and the second connecting rod 32 are linked through the third connecting rod 33, so as to ensure that the second connecting rod 32 can drive the first connecting rod 31 to move towards or away from the notch 121 through the third connecting rod 33, so that the moving contact 12 and the grounding static contact 11 are switched on or off, and the operation reliability of the grounding interlocking device is improved.

Specifically, as the second link 32 moves away from the panel 22, the third link 33 rotates in a clockwise direction to drive the first link 31 downward until the end of the first link 31 withdraws from the notch 121. When the second link 32 moves toward the panel 22, the third link 33 rotates in the counterclockwise direction to drive the first link 31 to move upward until the end of the first link 31 extends into the notch 121 and is in limit fit with the notch 121.

As shown in fig. 1 and 3, the first link 31 includes a third rod body 311 and a fourth rod body 312 which are pivotally connected, the fourth rod body 312 is pivotally connected to the first rod body 331, the third rod body 311 is arranged in a vertically liftable manner, an included angle B is formed between the third rod body 311 and the fourth rod body 312, the included angle B is greater than 90 °, an included angle C is formed between the fourth rod body 312 and the first rod body 331, and the included angle C is greater than 90 °. In this way, the above arrangement makes the structure of the first link 31 simpler, easy to process and implement, and reduces the processing cost and processing difficulty of the first link 31; on the other hand, it is ensured that the third rod 311 can always be moved up and down in the vertical direction in order to extend into the recess 121 or to withdraw from the recess 121.

As shown in fig. 1 and 3, the second connecting rod 32 includes a fifth rod 321 and a sixth rod 322 which are pivotally connected, the sixth rod 322 is pivotally connected to the second rod 332, the fifth rod 321 is slidably disposed along a horizontal direction, an included angle D is formed between the third rod 311 and the fourth rod 312, the included angle B is greater than 90 °, and an included angle E is formed between the sixth rod 322 and the second rod 332, and the included angle E is greater than 90 °. In this way, the above arrangement makes the structure of the second connecting rod 32 simpler, easy to process and realize, and reduces the processing cost and processing difficulty of the second connecting rod 32; on the other hand, the fifth rod 321 is ensured to be always capable of being along the horizontal direction, so that the movement reliability of the fifth rod 321 is improved.

Specifically, the pivot axis of the third link 33 is located below the first link 31 and the second link 32, so that the operation reliability of the link assembly 30 is improved, and the operation reliability of the link assembly 30 is prevented from being affected due to jamming.

As shown in fig. 2 and 4, the second locking portion 42 has a hook 421, the first locking portion 41 has a first recess 411, and the hook 421 can extend into the first recess 411 and limit stop with the first recess 411, so that the second locking portion 42 is in the locked state of the panel 22. In this way, the above arrangement makes the structure of the first locking portion 41 and the second locking portion 42 simpler, and is easy to process and implement, thereby reducing the processing cost and processing difficulty of the lock assembly 40.

As shown in fig. 2 and 4, the second locking portion 42 further has a pushing portion 422 connected to the hook 421, the fifth rod 321 has a stopper portion 3211, the lock assembly 40 further includes a bracket 44, the bracket 44 is disposed on the cabinet 21, and the second locking portion 42 is rotatably disposed on the bracket 44; the fifth rod 321 is inserted on the bracket 44, the elastic portion 43 is a spring, and the spring is sleeved on the fifth rod 321, and two ends of the spring are respectively limited and stopped by the bracket 44 and the stop portion 3211. Wherein, the fifth rod 321 further has a second recess 3212, and when the second locking portion 42 is in the locked state of the panel 22, the pushing portion 422 is located in the second recess 3212; when the fifth rod 321 moves towards the panel 22, the fifth rod 321 pushes the pushing portion 422 to rotate and withdraw from the second recess 3212, so that the hook 421 is driven by the pushing portion 422 to rotate to disengage from the first recess 411. In this way, the fifth rod 321 pushes the second locking portion 42 to rotate, so as to unlock or lock between the second locking portion 42 and the first locking portion 41, thereby reducing the unlocking and locking difficulty of the lock assembly 40. Meanwhile, the structure of the lock assembly 40 is simpler, the lock assembly is easy to process and realize, and the processing cost and the processing difficulty of the lock assembly 40 are reduced.

Specifically, when the panel 22 is closed on the cabinet 21, the hook 421 extends into the first recess 411 and stops with the first recess 411, and the spring is in a compressed state and stops with the bracket 44 and the stop portion 3211 at both ends. When a worker opens the panel 22, the moving contact 12 is required to be operated to rotate to a locking position, then the fastener on the panel 22 is unscrewed, the notch 121 faces the first link 31, the elastic portion 43 releases elastic potential energy to push the fifth link 321 to move towards the panel 22 through the stop portion 3211, the second recess portion 3212 moves towards the panel 22 to push the push portion 422 out of the second recess portion 3212, at this time, the second locking portion 42 rotates in a counterclockwise direction to separate the hook 421 from the first recess portion 411, the second locking portion 42 moves to a panel unlocking state, the fifth link 321 drives the third link 311 to move upwards through the sixth link 322, the third link 33 and the fourth link 312, so that an end portion of the third link 311 away from the fourth link 312 extends into the notch 121 and is in limit fit with the notch 121, and at this time, the moving contact 12 cannot rotate.

Specifically, when the operator closes the panel 22, the panel 22 pushes the spring to compress, the first locking portion 41 pushes the stop portion 3211 to move away from the panel 22, so that the stop portion 3211 pushes the fifth rod body 321 to move away from the panel 22, the second locking portion 42 moves clockwise under the action of its own weight, so that the push portion 422 enters the second recess 3212, the hook body 421 enters the first recess 411 and is located in the first recess 411 to stop, the second locking portion 42 moves to the panel locking state, the fifth rod body 321 drives the third rod body 311 to move downward through the sixth rod body 322, the third connecting rod 33 and the fourth rod body 312, so that the end portion of the third rod body 311 away from the fourth rod body 312 is withdrawn from the notch 121, and at this time, the moving contact 12 can rotate freely (rotating about the rotation axis for 90 °).

Optionally, the linkage assembly 30 further includes at least two guide structures 34. Wherein, each guiding structure 34 is disposed on the cabinet 21, the third rod 311 is slidably disposed through at least one guiding structure 34, and the fifth rod 321 is slidably disposed through at least another guiding structure 34. In this way, in the process of lifting the third rod 311 along the vertical direction and in the process of sliding the fifth rod 321 along the horizontal direction, the above-mentioned arrangement of the guide structure 34 can guide and limit the rods, so as to ensure that the third rod 311 and the fifth rod can move stably in the corresponding directions, avoid moving jam caused by deflection, and improve the operational reliability of the connecting rod assembly 30.

In this embodiment, the third rod 311 is slidably disposed on the two guide structures 34, and the two guide structures 34 are disposed at intervals along the vertical direction, so as to improve the guiding accuracy and reliability of the guide structures 34.

In this embodiment, the fifth rod 321 is slidably disposed on the two guiding structures 34, and the two guiding structures 34 are disposed at intervals along the horizontal direction, so as to improve the guiding accuracy and reliability of the guiding structures 34.

As shown in fig. 2 and 4, the panel 22 has a through hole, and the lock assembly 40 further includes a fixing structure 45, a fastener 46, and a cover 47. Wherein, the fixed structure 45 is disposed on the outer surface of the panel 22, at least part of the first locking portion 41 is disposed in the through hole and the first recess 411 is located at the inner side of the panel 22. A fastener 46 is provided penetrating inside the fixing structure 45 and the first locking portion 41 to connect the fixing structure 45 and the first locking portion 41. The cover 47 is reversibly arranged on the fixing structure 45 for shielding or avoiding the fastening head of the fastening element 46. In this way, the cover 47 can shield and protect the fastener 46 from rainwater and the like entering the junction of the fastener 46 and the fixing structure 45.

Specifically, the operating principle of the ground interlocking device is as follows:

Opening the panel operation flow: according to the requirement, the grounding fixed contact 11 is closed through an operating mechanism (configuration in the prior art) on the switch cabinet (the premise is that the operating flow meets the safety operation specification of the electrical cabinet), at the moment, the rotating shaft 122, the notch 121 and the contact structure 123 synchronously rotate anticlockwise, and when the contact structure 123 reaches a required position (the grounding fixed contact 11 and the moving contact at the position meet the engagement requirement, namely the grounding fixed contact 11 completes the closing operation), the notch 121 faces the upper end of the first connecting rod 31, a fastener on the panel 22 is loosened firstly, the fifth rod 321 moves towards the panel 22 under the action of pressure released by the elastic part 43, the fifth rod 321 synchronously moves towards the panel 22, the fifth rod 321 drives the third connecting rod 33 to rotate clockwise through the sixth rod 322, the other end of the third connecting rod 33 drives the third rod 311 to move upwards through the fourth rod 312, and the upper end of the third rod 311 is inserted into the notch 121 immediately so as to lock the rotating shaft 122, and at the moment, the grounding fixed contact 11 cannot be operated; meanwhile, when the fifth rod 321 is pushed toward the panel by the elastic portion 43, the panel 22 is simultaneously pushed to move away from the cabinet 21, and the lower end of the pushing portion 422 is pushed by the second recess 3212 on the fifth rod 321 to rotate counterclockwise, so that the hook 421 is disengaged from the first recess 411 to unlock the panel, and at this time, the panel 22 is simultaneously opened.

Closing the panel operation flow: the panel 22 is pushed to the cabinet 21, at this time, at least part of the first locking portion 41 on the panel 22 passes through the through hole and then abuts against the fifth rod 321 to move away from the panel 22, meanwhile, the elastic portion 43 compresses the accumulated force, and the second concave portion 3212 following the fifth rod 321 and synchronously moving away from the panel pushes the pushing portion 422, so that the second locking portion 42 rotates clockwise, and the hook 421 and the first concave portion 411 on the first locking portion 41 complete locking. Meanwhile, when the fifth rod 321 moves away from the panel 22, the sixth rod 322, the third connecting rod 33, the fourth rod 312 and the third rod 311 are forced to move synchronously (see the above-mentioned "door opening operation procedure") and finally the upper end of the third rod 311 moves downward to disengage from the notch 121 under the action force of the above-mentioned components, so that the unlocking of the grounding static contact 11 is completed, at this time, the grounding static contact 11 can complete the anticlockwise rotation operation of the contact structure 123 (i.e. the breaking operation of the grounding static contact 11) according to the required standard procedure, in the breaking state of the grounding static contact 11, the first connecting rod 31 is blocked by the rotating shaft 122 and has no space to move upward, the action of the components of the mechanism causes the fifth rod 321 to be unable to move toward the panel 22, the hook 421 of the fifth rod is unable to complete the unlocking action with the first locking portion 41, and the fixing structure 45 is unable to be pulled out.

Emergency unlocking process: in a special case, the emergency door opening operation must be performed manually, the fastening member 46 is exposed after the cover body 47 is lifted upwards anticlockwise, and at this time, after the fastening member 46 is rotated and detached by a special tool, the fixing structure 45 is separated from the first locking portion 41, so that the panel 22 can be opened, and the emergency unlocking function is completed.

As shown in fig. 1 and fig. 3, the present application further provides a switch cabinet, which includes the above-mentioned grounding interlocking apparatus.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

The grounding interlocking device comprises a grounding knife assembly, a connecting rod assembly and a lock assembly, wherein the grounding knife assembly comprises a grounding fixed contact and a moving contact, the moving contact is rotatably arranged on a cabinet body of the switch cabinet, and when the moving contact rotates to a locking position, the grounding fixed contact is limited and stopped, and the moving contact is provided with a notch. The connecting rod assembly comprises a first connecting rod and a second connecting rod which are connected with each other, and an included angle is formed between the first connecting rod and the second connecting rod; the lock assembly comprises a first locking part, a second locking part and an elastic part, wherein the first locking part is arranged on a panel of the switch cabinet, the second locking part is movably arranged, the elastic part is used for pushing a second connecting rod to move towards or away from the panel, and the second connecting rod is used for pushing the second locking part to move so as to be separated from the first locking part. Wherein the second locking portion has a panel locking state in which the second locking portion is locked with each other and a panel unlocking state in which the second locking portion is separated from the first locking portion. Thus, when the panel is closed on the cabinet body, the elastic part is in a compressed state and has elastic potential energy. When the panel is required to be opened, a worker firstly operates the moving contact to rotate to a locking position, then unscrews a fastener on the panel, the notch faces the first connecting rod, the elastic part releases elastic potential energy to push the second connecting rod to move towards the panel, the second connecting rod pushes the second locking part to move to an unlocking state of the panel, and drives the first connecting rod to move towards the notch, so that the end part of the first connecting rod, which is far away from the second connecting rod, stretches into the notch and is in limit fit with the notch, and at the moment, the moving contact cannot rotate; when the panel is closed by a worker, the first locking part pushes the second connecting rod to move away from the panel, the second connecting rod drives the first connecting rod to move away from the notch, so that the end part of the first connecting rod withdraws from the notch, and the moving contact can rotate freely.

Compared with the prior art that the grounding switch operation shaft is directly extended to the rear of the cabinet and is interlocked with the rear lower door, the grounding switch operation shaft is connected with the lock assembly through the connecting rod assembly, so that the reliability of locking and unlocking the grounding static contact is improved, the structure of the grounding interlocking device is simpler, the grounding switch operation shaft is easy to process and realize, the processing cost and the processing difficulty of the grounding interlocking device are reduced, and the problems of poor reliability and high cost of the rear door interlocking device of the switch cabinet in the prior art are solved. Meanwhile, the grounding interlocking device moves the connecting rod assembly and the lockset assembly to the bottom of the switch cabinet, so that the assemblies are far away from the branch row, and the safety and the electrical reliability of the cabinet body are improved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A ground interlock device, comprising:

The grounding knife assembly (10) comprises a grounding fixed contact (11) and a moving contact (12), wherein the moving contact (12) is rotatably arranged on a cabinet body (21) of the switch cabinet, and a gap (121) is formed in a rotating shaft (122) of the moving contact (12);

The connecting rod assembly (30) comprises a first connecting rod (31) and a second connecting rod (32) which are connected with each other, wherein an included angle is formed between the first connecting rod (31) and the second connecting rod (32); when the movable contact (12) rotates to a locking position, the movable contact is switched on with the grounding fixed contact (11), and the notch (121) is arranged towards the first connecting rod (31);

A lock assembly (40) comprising a first locking part (41), a second locking part (42) and an elastic part (43), wherein the first locking part (41) is arranged on a panel (22) of the switch cabinet, the second locking part (42) is movably arranged, the elastic part (43) is used for pushing the second connecting rod (32) to move towards the panel (22), and the second connecting rod (32) is used for pushing the second locking part (42) to move so as to be separated from the first locking part (41); the second locking portion (42) has a panel (22) locked state in which the second locking portion (41) is locked to each other and a panel (22) unlocked state in which the second locking portion (41) is separated from each other;

When the panel (22) needs to be opened, the movable contact (12) is rotated to the locking position, the elastic part (43) pushes the second connecting rod (32) to move towards the panel (22), the second connecting rod (32) pushes the second locking part (42) to move to the panel (22) in an unlocking state, and the first connecting rod (31) is driven to move towards the notch (121), so that the end part of the first connecting rod (31) away from the second connecting rod (32) stretches into the notch (121) and is in limit fit with the notch (121), and the locking of the panel (22) to the grounding knife assembly (10) is realized;

When the panel (22) is closed, the first locking part (41) pushes the second connecting rod (32) to move away from the panel (22), and the second connecting rod (32) drives the first connecting rod (31) to move away from the notch (121), so that the end part of the first connecting rod (31) withdraws from the notch (121) to lock the panel (22) by the grounding knife assembly (10).

2. The ground interlock device of claim 1 wherein the linkage assembly (30) further comprises:

The third connecting rod (33) is rotatably arranged on the cabinet body (21), the third connecting rod (33) comprises a first rod body (331) and a second rod body (332), the first rod body (331) is connected with the first connecting rod (31), and the second rod body (332) is connected with the second connecting rod (32).

3. The ground interlocking device according to claim 2, wherein the first connecting rod (31) comprises a third rod body (311) and a fourth rod body (312) which are pivotally connected, the fourth rod body (312) is pivotally connected with the first rod body (331), the third rod body (311) is arranged in a vertically liftable manner, an included angle B is formed between the third rod body (311) and the fourth rod body (312), and an included angle C is formed between the fourth rod body (312) and the first rod body (331).

4. A ground interlock according to claim 3, characterized in that the second link (32) comprises a fifth lever (321) and a sixth lever (322) pivotally connected, the sixth lever (322) being pivotally connected to the second lever (332), the fifth lever (321) being slidably arranged in a horizontal direction, an angle D being arranged between the third lever (311) and the fourth lever (312), and an angle E being arranged between the sixth lever (322) and the second lever (332).

5. The ground interlock device according to claim 4, wherein the second locking portion (42) has a hook body (421), the first locking portion (41) has a first recess (411), and the hook body (421) can extend into the first recess (411) and limit-stop with the first recess (411) so that the second locking portion (42) is in the panel (22) locked state.

6. The ground interlock device of claim 5 wherein the second locking portion (42) further has a push portion (422) coupled to the hook body (421), the fifth lever body (321) has a stop portion (3211), and the lock assembly (40) further comprises:

A bracket (44) provided on the cabinet (21), the second locking portion (42) being rotatably provided on the bracket (44); the fifth rod body (321) is arranged on the bracket (44) in a penetrating way, the elastic part (43) is a spring, the spring is sleeved on the fifth rod body (321), and two ends of the spring are respectively in limit stop with the bracket (44) and the stop part (3211);

Wherein the fifth rod body (321) further has a second recess (3212), and the pushing portion (422) is located in the second recess (3212) when the second locking portion (42) is in the locked state of the panel (22); when the fifth rod body (321) moves towards the panel (22), the fifth rod body (321) pushes the pushing part (422) to rotate and withdraw from the second concave part (3212), so that the hook body (421) is driven by the pushing part (422) to rotate to be disengaged from the first concave part (411).

7. The ground interlock device of claim 4 wherein the linkage assembly (30) further comprises:

At least two guide structures (34), each guide structure (34) is arranged on the cabinet body (21), the third rod body (311) is slidably arranged on at least one guide structure (34), and the fifth rod body (321) is slidably arranged on at least one other guide structure (34).

8. The ground interlock device according to claim 1, characterized in that the moving contact (12) comprises:

a contact structure (123) having a contact portion and a sleeve connected to each other;

The rotary shaft (122) is rotationally connected with the cabinet body (21), the sleeve is sleeved on the rotary shaft (122) to be rotationally connected with the cabinet body (21), the sleeve is provided with the notch (121), the sleeve is radial, and one side of the notch (121) penetrates through the outer surface of the sleeve, and the other side of the notch is arranged at intervals with the rotary shaft (122).

9. The ground interlock of claim 5 wherein the faceplate (22) has a through hole, the lock assembly (40) further comprising:

a fixing structure (45) arranged on the outer surface of the panel (22), at least part of the first locking part (41) is penetrated in the through hole, and the first concave part (411) is positioned on the inner side of the panel (22);

A fastener (46) penetrating the fixing structure (45) and the first locking portion (41) to connect the fixing structure (45) and the first locking portion (41);

And the cover body (47) is arranged on the fixed structure (45) in a reversible manner and is used for shielding or avoiding the fastening head of the fastening piece (46).

10. A switchgear comprising a ground interlock device according to any one of claims 1 to 9.