CN218549088U

CN218549088U - Interlocking device and cubical switchboard that closing is prevented in ground connection

Info

Publication number: CN218549088U
Application number: CN202220849768.6U
Authority: CN
Inventors: 韩福亮; 孙文艺; 李勇; 王忠宇; 王小平; 王永祥
Original assignee: Guangdong Mingyang Electric Co ltd
Current assignee: Guangdong Mingyang Electric Co ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2023-02-28
Anticipated expiration: 2032-04-13

Abstract

The utility model discloses an interlock and cubical switchboard that ground connection prevented combined floodgate, this interlock, include: the first rotating piece is used for rotationally triggering the grounding switch and is provided with a driving part; the second rotating piece is used for rotating and triggering a closing switch of the circuit breaker and is provided with a limiting piece; the link mechanism is arranged between the driving part and the limiting part, and the driving part is abutted against one end of the link mechanism; when the first rotating piece rotates to trigger the grounding switch, one end, far away from the driving part, of the connecting rod mechanism driven by the driving part abuts against the limiting piece so as to prevent the second rotating piece from rotating to trigger the closing switch. The interlocking device with the structure can limit the closing of the circuit breaker while being grounded, and is simple in structure and convenient to operate. The switch cabinet comprises the interlocking device, and the switch cabinet can ensure that the circuit breaker cannot be switched on when in a grounding state so as to improve the safety of equipment.

Description

Interlocking device for preventing switch-on by grounding and switch cabinet

Technical Field

The utility model relates to a technical field of cubical switchboard especially relates to an interlock and cubical switchboard that ground connection prevents closing a floodgate.

Background

As an electrical device, when the switch cabinet is overhauled, the grounding treatment must be carried out on the device, and meanwhile, the circuit breaker is required to be switched on due to misoperation, so that the safety of an overhaul worker is prevented from being endangered by the electrification of the device. Therefore, there is a great necessity to design an interlock device capable of preventing the circuit breaker from being closed after reliable grounding. However, the existing interlocking device is complex in structure, numerous in parts and inconvenient in actual operation, and troubles are brought to installation and maintenance in the front and the later periods.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an interlock that ground connection prevented combined floodgate, this interlock can ensure after equipment ground connection, and the circuit breaker can't carry out combined floodgate operation, simple structure, and spare part is few, convenient operation.

The utility model also discloses a cubical switchboard, this cubical switchboard can guarantee that the circuit breaker can't close a floodgate when the ground connection state, improve equipment's security.

According to the utility model discloses interlock that ground connection prevented combined floodgate of first aspect embodiment, include: the first rotating piece is used for rotating and triggering the grounding switch and is provided with a driving part; the second rotating part is used for rotating and triggering a closing switch of the circuit breaker and is provided with a limiting part; the link mechanism is arranged between the driving part and the limiting part, and the driving part is abutted against one end of the link mechanism; when the first rotating part rotates to trigger the grounding switch, the driving part drives one end, far away from the driving part, of the link mechanism to abut against the limiting part so as to prevent the second rotating part from rotating to trigger the closing switch.

According to the utility model discloses interlock that ground connection prevents closing a floodgate has following beneficial effect at least: when equipment needs to be grounded, the first rotating part rotates to trigger the grounding switch, so that the equipment is in a grounding state, meanwhile, the first rotating part drives the driving part to rotate synchronously, and then drives the connecting rod mechanism to move, so that one end, far away from the driving part, of the connecting rod mechanism moves to be close to the second rotating part and abuts against the limiting part, the second rotating part is prevented from rotating to trigger the closing switch of the circuit breaker, the circuit breaker cannot perform closing operation, the safety of the equipment is guaranteed, and misoperation of operators is effectively avoided. When the first rotating piece exits from the grounding position, the driving part drives the link mechanism to move, so that one end, away from the driving part, of the link mechanism is away from the limiting part, the second rotating piece can rotate again, and the circuit breaker can be switched on. The interlocking device with the structure has a simple and compact structure, an operator only needs to drive the first rotating piece to rotate, the rotation of the second rotating piece can be limited, the operation is convenient, and the interlocking is reliable.

In some embodiments of the present invention, the driving portion is a cam, the link mechanism includes a first mounting member, a link member and a second mounting member, the first mounting member is provided with a first limit hole, the second mounting member is provided with a second limit hole, the two ends of the link member movably penetrate through the first limit hole and the second limit hole, the link member is close to one end of the cam is provided with an abutting portion, and the cam abuts against the abutting portion.

In some embodiments of the present invention, one of the abutting portion and the connecting rod member is provided with a threaded hole, and the other is provided with a stud portion, and the threaded hole is in threaded engagement with the stud portion.

In some embodiments of the present invention, the first mounting member includes two opposite folded portions, and the first limiting hole is disposed on two of the folded portions.

In some embodiments of the present invention, the connecting rod member includes two horizontal sections and an inclined section connected to the two horizontal sections, and the extending directions of the two horizontal sections are parallel to each other.

In some embodiments of the present invention, the link mechanism further includes an elastic member, the elastic member is movably disposed through the link member, one end of the elastic member abuts against the first mounting member, and the other end of the elastic member abuts against the abutting portion.

In some embodiments of the present invention, the first mounting member is located below the second mounting member, and the axes of the first limiting hole and the second limiting hole extend in a vertical direction.

In some embodiments of the present invention, the limiting member is a plate, and the second rotating member and the plate are both provided with through holes for the threaded fasteners to pass through.

The utility model also discloses a cubical switchboard, the interlock that a ground connection prevented combined floodgate including above-mentioned arbitrary technical scheme. This cubical switchboard can guarantee that the circuit breaker can't close a floodgate when ground connection state, improve equipment's security.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an installation diagram of an embodiment of an interlock apparatus for preventing ground switching on according to the present invention;

FIG. 2 is an enlarged view of a portion of the embodiment of FIG. 1 at A;

FIG. 3 is a schematic perspective view of the interlock device of the embodiment of FIG. 1;

FIG. 4 is a side view of the interlock device of FIG. 3;

fig. 5 is a structural view of the first mounting member of fig. 3.

In the figure: the cam mechanism comprises a first rotating member 100, a cam 110, a link mechanism 200, a contact part 210, a first mounting piece 220, a folding edge part 221, a link piece 230, a second mounting piece 240, an elastic piece 250, a second rotating member 300 and a limiting piece 310.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, an interlock apparatus for preventing closing of a gate by grounding includes: the first rotating member 100, the first rotating member 100 is used for rotating and triggering the earthing switch, the first rotating member 100 has driving parts; a second rotating member 300, the second rotating member 300 being used to rotate a closing switch of the trigger circuit breaker, the second rotating member 300 being provided with a limiting member 310; a link mechanism 200 disposed between the driving portion and the stopper 310, the driving portion abutting against one end of the link mechanism 200; when the first rotating member 100 rotates to trigger the grounding switch, one end of the driving portion driving the link mechanism 200 away from the driving portion abuts against the limiting member 310 to prevent the second rotating member 300 from rotating to trigger the closing switch.

The interlock of closing is prevented in ground connection of above structure, when needs carry out ground connection operation to equipment, first rotation piece 100 rotates and triggers earthing switch, make equipment be in the ground connection state, and simultaneously, first rotation piece 100 drives the synchronous rotation of drive division, and then drive link mechanism 200 motion, so that link mechanism 200 keeps away from the one end of drive division and removes and be close to second rotation piece 300 and butt in locating part 310, rotate the closing switch who triggers the circuit breaker with hindering second rotation piece 300, make the circuit breaker can't carry out the closing operation, the security of equipment has been guaranteed, effectively avoid operating personnel's maloperation. When the first rotating member 100 exits from the grounding position, the driving portion drives the link mechanism 200 to move, such that one end of the link mechanism 200, which is far away from the driving portion, is far away from the limiting member 310, such that the second rotating member 300 can rotate again, and thus, a closing operation of the circuit breaker can be performed. The interlocking device with the structure has a simple and compact structure, an operator only needs to drive the first rotating piece 100 to rotate, the rotation of the second rotating piece 300 can be limited, the operation is convenient, and the interlocking is reliable.

It can be understood that there is a certain range of rotation angle of the second rotating member 300, which is limited by the driving mechanism inside the circuit breaker and connected to the second rotating member, and the rotation area is fan-shaped, that is, only one end of the link mechanism 200 is abutted against the limiting member 310 in the fan-shaped area, so as to prevent the second rotating member 300 from rotating to trigger the closing switch of the circuit breaker.

Referring to fig. 1 to 4, in some embodiments of the present invention, the driving portion is the cam 110, the link mechanism 200 includes a first mounting component 220, a connecting rod element 230 and a second mounting component 240, the first mounting component 220 is provided with a first limiting hole, the second mounting component 240 is provided with a second limiting hole, two ends of the connecting rod element 230 movably penetrate through the first limiting hole and the second limiting hole, one end of the connecting rod element 230 close to the cam 110 is provided with the abutting portion 210, and the cam 110 abuts against the abutting portion 210. Specifically, under the rotation of the first rotating member 100, the cam 110 pushes the abutting portion 210 to move, and further drives one end of the connecting rod 230 away from the abutting portion 210 to move into the rotation region of the limiting member 310, so as to limit the rotation of the second rotating member 300. The cam 110 and the abutting part 210 are compactly matched, and the connecting rod piece 230 is driven by the cam 110 to move in the first mounting piece 220 and the second mounting piece 240, so that the structure is simple and compact, and the operation is convenient. It will be appreciated that the first rotating member 100 is a shaft member, and the cam 110 is protruded along the outer circumference of the shaft member, wherein the cam 110 is a disc cam 110 structure, i.e. the radial profile thereof is varied in size and rotates about the axis thereof. The abutting portion 210 may be a circular plate, so that a line contact is formed between the abutting portion 210 and the profile of the cam 110, and the acting force of the cam 110 on the abutting portion 210 is always perpendicular to the flat bottom surface of the abutting portion 210, so that the force is stably applied, and the transmission efficiency is high.

In some embodiments of the present invention, one of the abutting portion 210 and the connecting rod member 230 is provided with a threaded hole, and the other is provided with a stud portion, and the threaded hole is in threaded engagement with the stud portion. The bolt is engaged, so that the abutting portion 210 can be detachably connected to the connecting rod 230, the connection is reliable, the installation is convenient, and the subsequent replacement of the connecting rod 230 is facilitated.

Referring to fig. 5, in some embodiments of the present invention, the first mounting member 220 includes two opposite folded portions 221, and the first limiting hole is oppositely disposed on the two folded portions 221. The two hem parts 221 guide and limit the movement of the connecting rod piece 230, so that the deviation of one end position of the connecting rod piece 230 is reduced, and the moving stability is improved. It can be understood that the flange portion 221 can be integrally formed on the first mounting member 220 by injection molding, which is beneficial to improve the overall structural strength and the connection strength.

Referring to fig. 3 and 4, in some embodiments of the present invention, the link member 230 includes two horizontal segments and an inclined segment connected to the two horizontal segments, and the extending directions of the two horizontal segments are parallel to each other. The two ends of the connecting rod 230 are parallel horizontal sections, which is beneficial to moving one end of the connecting rod 230 to drive the other end thereof to move in parallel, so that the other end can accurately extend out of the rotation range of the limiting member 310, and the linkage effect is improved. The inclined section is beneficial to limiting the movement stroke of the connecting rod piece 230 and preventing the connecting rod piece 230 from separating from other parts.

Referring to fig. 4, in some embodiments of the present invention, the link mechanism 200 further includes an elastic member 250, the elastic member 250 is movably disposed through the link member 230, one end of the elastic member 250 abuts against the first mounting member 220, and the other end of the elastic member 250 abuts against the abutting portion 210. When the first rotating member 100 rotates to trigger the grounding switch, the cam 110 pushes the abutting portion 210 to move, so as to compress the elastic member 250; when the first rotating member 100 rotates to exit the grounding switch, the elastic member 250 resets to drive the abutting portion 210 to reset. The acting force of the elastic member 250 can make the abutting portion 210 always abut against the cam 110, thereby improving the transmission stability.

Referring to fig. 2, in some embodiments of the present invention, the first mounting member 220 is located below the second mounting member 240, and the axes of the first limiting hole and the second limiting hole extend in the vertical direction. Specifically, the two ends of the connecting rod 230 penetrate through the first limit hole and the second limit hole, so that the connecting rod 230 moves along the vertical direction, on one hand, the abutting part 210 can be abutted against the cam 110 all the time under the action of gravity, the transmission stability is improved, and on the other hand, the connecting rod 230 can be reset through the action of gravity.

Referring to fig. 3 and 4, in some embodiments of the present invention, the limiting member 310 is a plate, and the second rotating member 300 and the plate are both provided with through holes for the threaded fasteners to pass through. The plate member increases the contact area with the link member 230, increases the resistance against the rotation of the second rotating member 300, and prevents the operator from operating erroneously. The plate member is detachably connected to the second rotating member 300, so that when the limiting member 310 is worn seriously, people can replace the limiting member 310.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An interlock device for preventing closing by grounding, comprising:

the first rotating piece (100), the first rotating piece (100) is used for rotating and triggering the grounding switch, and the first rotating piece (100) is provided with a driving part;

the circuit breaker comprises a second rotating part (300), wherein the second rotating part (300) is used for rotating and triggering a closing switch of the circuit breaker, and the second rotating part (300) is provided with a limiting part (310);

a link mechanism (200) provided between the driving portion and the stopper (310), the driving portion abutting against one end of the link mechanism (200);

when the first rotating member (100) rotates to trigger the grounding switch, the driving portion drives one end, away from the driving portion, of the link mechanism (200) to abut against the limiting member (310), so that the second rotating member (300) is prevented from rotating to trigger the closing switch.

2. The interlock apparatus for preventing closing of a switch by grounding as claimed in claim 1, wherein:

the driving part is a cam (110), the link mechanism (200) comprises a first mounting part (220), a link piece (230) and a second mounting part (240), the first mounting part (220) is provided with a first limiting hole, the second mounting part (240) is provided with a second limiting hole, two ends of the link piece (230) movably penetrate through the first limiting hole and the second limiting hole, one end, close to the cam (110), of the link piece (230) is provided with an abutting part (210), and the cam (110) abuts against the abutting part (210).

3. The interlock apparatus for preventing closing of a switch by grounding as claimed in claim 2, wherein:

one of the abutting part (210) and the connecting rod piece (230) is provided with a threaded hole, and the other one is provided with a stud part, and the threaded hole is in threaded fit with the stud part.

4. The interlock apparatus for preventing closing of a switch by grounding as claimed in claim 2, wherein:

the first mounting part (220) comprises two oppositely arranged folding edge parts (221), and the first limiting hole is oppositely arranged on the two folding edge parts (221).

5. The interlock device for preventing closing of the switch according to claim 2, wherein:

the connecting rod piece comprises two horizontal sections and an inclined section connected with the two horizontal sections, and the extending directions of the two horizontal sections are parallel to each other.

6. The interlock device for preventing closing of the switch according to claim 2, wherein:

the link mechanism (200) further comprises an elastic member (250), the elastic member (250) is movably arranged in the link member (230) in a penetrating manner, one end of the elastic member (250) abuts against the first mounting member (220), and the other end of the elastic member (250) abuts against the abutting portion (210).

7. The interlock apparatus for preventing closing of a switch by grounding as claimed in claim 2, wherein:

the first mounting part (220) is located below the second mounting part (240), and the axes of the first limiting hole and the second limiting hole extend along the vertical direction.

8. The interlock apparatus for preventing closing of a switch by grounding as claimed in claim 1, wherein:

the limiting part (310) is a plate, and the second rotating part (300) and the plate are both provided with through holes through which threaded fasteners can pass.

9. A switchgear cabinet characterised by comprising an earth-fault closing prevention interlock as claimed in any one of claims 1 to 8.