A circuit breaker anti-misoperation mechanism for power distribution cabinets

Abstract

This utility model relates to the field of circuit breaker technology for distribution cabinets, and more particularly to an anti-misoperation mechanism for circuit breakers in distribution cabinets. It includes a cabinet, a circuit breaker body, a mounting bracket, a grounding gate, a grounding switch, mounting rods, wedges, and springs. The mounting bracket is fixedly installed inside the cabinet, the grounding gate is fixedly installed on one side of the mounting bracket, and the grounding switch is located below the grounding gate. Two sets of springs are fixedly installed between the grounding switch and the mounting bracket. Two sets of mounting rods are fixedly installed at the upper end of the grounding switch, and wedges are fixedly installed at the upper end of the mounting rods, with the wedges penetrating through a partition. This utility model utilizes the cooperation between the circuit breaker body and the wedges. When the circuit breaker body is inside the cabinet, pressure is applied to the wedges to compress the springs, causing the grounding gate and grounding switch to separate. When the circuit breaker body is removed, the springs extend, causing the grounding gate and grounding switch to close, preventing electrical accidents caused by misoperation.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology for distribution cabinets, and in particular to a mechanism for preventing misoperation of a circuit breaker for distribution cabinets. Background Technology

[0002] In power systems, distribution cabinets are important power distribution and control devices. Their safe operation is directly related to the stable operation of the power system and the personal safety of operators. High-voltage distribution cabinets usually use handcart-type circuit breakers inside.

[0003] When performing maintenance work, the main body of the handcart-type circuit breaker needs to be removed before grounding operations are performed to ensure the safety of the maintenance work. However, after the maintenance work is completed, operators may attempt to close the circuit breaker without disconnecting the grounding switch, or mistakenly operate the grounding switch while the circuit breaker is in the closed state. Such misoperations may lead to serious electrical accidents, such as short circuits and electric arcs, causing damage to equipment and personnel. Although there are relevant interlocking devices that prevent the grounding switch and the circuit breaker from closing at the same time, electromagnetic locks or electronic control methods are usually used, which are costly and have strict requirements for the power environment, and are prone to failure in harsh environments.

[0004] Therefore, to address the above issues, a circuit breaker anti-misoperation mechanism for distribution cabinets can be designed. Through a simple mechanical linkage mechanism, when the circuit breaker is normally connected and closed in the distribution cabinet, the grounding switch cannot be closed. Furthermore, when the circuit breaker is returned to the cabinet after maintenance, the grounding switch will be automatically disconnected to prevent the circuit breaker from being closed without the grounding switch being disconnected. Utility Model Content

[0005] To overcome the problems that current circuit breaker and grounding switch interlocking devices typically use electromagnetic locks or electronic control methods, which are costly and have strict requirements for the power environment, and are prone to failure in harsh environments.

[0006] The technical solution of this utility model is as follows: a circuit breaker anti-misoperation mechanism for a distribution cabinet includes a cabinet, a circuit breaker body, a mounting bracket, a grounding gate seat, a grounding switch, mounting rods, wedges, and springs. A partition is fixedly installed inside the cabinet. The circuit breaker body is located above the partition. The mounting bracket is fixedly installed inside the cabinet and is located below the partition. The grounding gate seat is fixedly installed on one side of the mounting bracket. The grounding switch is located below the grounding gate seat. Two sets of springs are fixedly installed between the grounding switch and the mounting bracket. Two sets of mounting rods are fixedly installed at the upper end of the grounding switch. A wedge is fixedly installed at the upper end of the mounting rod, and the wedge penetrates the partition.

[0007] Preferably, a spring is used to install the mounting bracket and the grounding switch, and a mounting rod is used to connect and fix the wedge to the mounting bracket. When the circuit breaker body is inside the cabinet, the lower end of the circuit breaker body will press the wedge, thereby compressing the spring and separating the grounding seat and the grounding switch. When the circuit breaker body is removed from the cabinet, the spring extends and pushes the grounding switch to close the grounding with the grounding seat. When the circuit breaker body is installed into the cabinet, the circuit breaker body contacts the wedge, thereby applying downward pressure to the wedge and compressing the spring, separating the grounding switch from the grounding seat, preventing the circuit breaker body from being closed while the grounding is not disconnected.

[0008] Preferably, two sets of guide rods are symmetrically fixedly installed at the lower end of the grounding switch, and the guide rods are slidably connected to the mounting bracket.

[0009] Preferably, the upper end of the partition is provided with two sets of sliding grooves, which are arranged symmetrically.

[0010] Preferably, the lower end of the circuit breaker body is rotatably connected to multiple sets of rollers, with the rollers corresponding to the slide grooves.

[0011] Preferably, the cabinet has multiple sets of female contacts inside, and multiple sets of female contacts are provided on the rear side of the circuit breaker body, with the female contacts corresponding to each other.

[0012] Preferably, a mounting plate is fixedly installed on the lower top surface inside the cabinet, a socket is provided on the front side of the mounting plate, and a plug is provided on the upper part of the circuit breaker body, with the plug and socket corresponding to each other.

[0013] Preferably, two sets of rotating shafts are fixedly installed on the front side of the mounting plate, and a locking bar is rotatably connected to the front side of the rotating shafts.

[0014] The beneficial effects of this utility model are:

[0015] When the circuit breaker body is normally connected and closed in the cabinet, the lower end of the circuit breaker body will press against the wedge, thereby compressing the spring and separating the grounding switch and grounding knife, preventing closing. When the circuit breaker body is removed from the cabinet, the spring automatically extends, pushing the grounding knife and grounding switch to close the grounding, ensuring the safety of the operator. When the circuit breaker body is pushed into the cabinet, it will first contact the wedge, which will apply downward pressure to the wedge, compressing the spring and separating the grounding knife and grounding switch, preventing the circuit breaker body from being closed while the grounding is not disconnected, thus preventing safety accidents. The interlocking mechanism is formed by mechanical linkage, which has no requirements for the power environment, has low cost, and can effectively ensure the safety of personnel and equipment. Attached Figure Description

[0016] Figure 1The diagram shown is a three-dimensional structural schematic of the anti-misoperation mechanism of the circuit breaker in the distribution cabinet of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural representation of the internal structure of the anti-misoperation mechanism of the circuit breaker in the distribution cabinet of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the mounting bracket for the anti-misoperation mechanism of the circuit breaker in the distribution cabinet of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the main body of the circuit breaker of the distribution cabinet circuit breaker anti-misoperation mechanism of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Cabinet; 101. Partition; 102. Slide rail; 103. Female contact; 2. Circuit breaker body; 201. Roller; 202. Female contact; 3. Mounting bracket; 301. Grounding gate seat; 302. Grounding switch; 303. Mounting rod; 304. Wedge; 305. Spring; 306. Guide rod; 4. Mounting plate; 401. Socket; 402. Plug; 501. Shaft; 502. Locking bar. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 and Figure 3This utility model provides an embodiment: a circuit breaker anti-misoperation mechanism for a distribution cabinet, including a cabinet 1, a circuit breaker body 2, a mounting bracket 3, a grounding seat 301, a grounding switch 302, a mounting rod 303, a wedge 304, and a spring 305. A partition 101 is fixedly installed inside the cabinet 1. The circuit breaker body 2 is positioned above the partition 101. The mounting bracket 3 is fixedly installed inside the cabinet 1, located below the partition 101. The grounding seat 301 is fixedly installed on one side of the mounting bracket 3. The grounding switch 302 is positioned below the grounding seat 301. Two sets of springs 305 are fixedly installed between the grounding switch 302 and the mounting bracket 3. Two sets of mounting rods 303 are fixedly installed at the upper end of the grounding switch 302. A wedge 304 is fixedly installed at the upper end of each mounting rod 303, and the wedge 304 penetrates the partition 101. A spring 305 is used to install the mounting bracket 3 and the grounding switch 302. A mounting rod 303 is used to connect and fix the wedge 304 to the mounting bracket 3. When the circuit breaker body 2 is inside the cabinet 1, the lower end of the circuit breaker body 2 will press the wedge 304, thereby compressing the spring 305, causing the grounding seat 301 and the grounding switch 302 to separate, preventing the closing operation. When the circuit breaker body 2 is removed from the cabinet 1, the spring 305 extends, pushing the grounding switch 302 and the grounding seat 301 to close the grounding. When the circuit breaker body 2 is installed into the cabinet 1, the circuit breaker body 2 contacts the wedge 304, thereby applying downward pressure to the wedge 304, compressing the spring 305, causing the grounding switch 302 and the grounding seat 301 to separate, preventing the circuit breaker body 2 from closing when the grounding is not disconnected.

[0023] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, two sets of guide rods 306 are symmetrically fixedly installed at the lower end of the grounding switch 302, and the guide rods 306 are slidably connected to the mounting bracket 3. The guide rods 306 can guide the lifting and lowering of the grounding switch 302 to ensure stable lifting and lowering of the grounding switch 302. Two sets of sliding grooves 102 are provided at the upper end of the partition plate 101, and the two sets of sliding grooves 102 are symmetrically arranged. Multiple sets of rollers 201 are rotatably connected to the lower end of the circuit breaker body 2, and the rollers 201 correspond to the sliding grooves 102. By setting the sliding grooves 102 in conjunction with the rollers 201, the circuit breaker body 2 can be positioned for loading and unloading in the cabinet 1. At the same time, the rollers 201 can reduce friction, making the loading and unloading of the circuit breaker body 2 more labor-saving and convenient.

[0024] Please see Figure 1 , Figure 2 and Figure 4In this embodiment, the cabinet 1 has multiple sets of female contacts 103 inside, and the circuit breaker body 2 has multiple sets of female contacts 202 on the rear side, with the female contacts 202 corresponding to the female contacts 103. A mounting plate 4 is fixedly installed on the lower end of the top surface inside the cabinet 1, and a socket 401 is provided on the front side of the mounting plate 4. A plug 402 is provided on the upper end of the circuit breaker body 2, with the plug 402 corresponding to the socket 401. By setting the female contacts 202 to contact the female contacts 103 and by setting the plug 402 to connect and cooperate with the socket 401, the circuit breaker body 2 can be closed. Two sets of rotating shafts 501 are fixedly installed on the front side of the mounting plate 4, and a locking bar 502 is rotatably connected to the front side of the rotating shafts 501. By setting the rotating shafts 501 to install the locking bar 502, when the circuit breaker body 2 is located inside the cabinet 1, the locking bar 502 can limit and fix the circuit breaker body 2.

[0025] When the circuit breaker body 2 is normally placed inside the cabinet 1 during operation, the sub-contact 202 contacts the female contact 103, and the plug 402 is connected to the socket 401 to achieve the closing of the circuit breaker body 2.

[0026] At this time, the lower end of the circuit breaker body 2 will press the wedge block 304, thereby compressing the spring 305, causing the grounding gate 301 and the grounding switch 302 to separate, making it impossible to perform the closing operation. When the circuit breaker body 2 is taken out of the cabinet, the spring 305 automatically extends, pushing the grounding switch 302 to close the grounding with the grounding gate 301, ensuring the safety of the operator. At this time, the wedge block 304 passes through the partition 101.

[0027] When the circuit breaker body 2 is installed into the cabinet 1 after the operation is completed, the sliding groove 102 and the roller 201 are used to position the circuit breaker body 2 for loading and unloading in the cabinet 1. At the same time, the roller 201 can reduce friction, making the loading and unloading of the circuit breaker body 2 easier and more convenient. During the process of pushing the circuit breaker body 2 into the cabinet 1, it will first contact the wedge 304, which will apply downward pressure to the wedge 304 and compress the spring 305, causing the grounding switch 302 to separate from the grounding seat 301. This prevents the circuit breaker body 2 from being closed while the grounding is not disconnected, ensuring the safety of equipment and personnel. Then the sub-contact 202 of the circuit breaker body 2 will contact the female contact 103 in the cabinet 1. After connecting the plug 402 and the socket 401, the circuit breaker body 2 is closed.

[0028] Through the above steps, when the circuit breaker body 2 is inside the cabinet 1, the lower end of the circuit breaker body 2 will press against the wedge block 304, thereby compressing the spring 305 and separating the grounding seat 301 and the grounding switch 302. When the circuit breaker body 2 is removed from the cabinet 1, the spring 305 extends, pushing the grounding switch 302 to close the grounding with the grounding seat 301. When the circuit breaker body 2 is installed into the cabinet 1, the circuit breaker body 2 contacts the wedge block 304, thereby applying downward pressure to the wedge block 304 and compressing the spring 305, causing the grounding switch 302 to separate from the grounding seat 301. This prevents the circuit breaker body 2 from being closed without the grounding being disconnected. The interlocking mechanism is formed by mechanical linkage, which has no requirements for the power environment, has low cost, and can effectively ensure the safety of personnel and equipment. This solves the problem that the current interlocking devices of circuit breakers and grounding switches usually use electromagnetic locks or electronic control methods, which are costly and have strict requirements for the power environment, and are prone to failure in harsh environments.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A circuit breaker anti-misoperation mechanism for a distribution cabinet, comprising a cabinet (1), characterized in that: It also includes a circuit breaker body (2), a mounting bracket (3), a grounding gate seat (301), a grounding switch (302), a mounting rod (303), a wedge (304), and a spring (305). A partition (101) is fixedly installed inside the cabinet (1). The circuit breaker body (2) is located above the partition (101). The mounting bracket (3) is fixedly installed inside the cabinet (1). The mounting bracket (3) is located below the partition (101). The grounding gate seat (301) is fixedly installed on one side of the mounting bracket (3). The grounding switch (302) is located below the grounding gate seat (301). Two sets of springs (305) are fixedly installed between the grounding switch (302) and the mounting bracket (3). Two sets of mounting rods (303) are fixedly installed at the upper end of the grounding switch (302). A wedge (304) is fixedly installed at the upper end of the mounting rod (303). The wedge (304) penetrates the partition (101).

2. The anti-misoperation mechanism for a distribution cabinet circuit breaker according to claim 1, characterized in that: Two sets of guide rods (306) are symmetrically fixed at the lower end of the grounding switch (302), and the guide rods (306) are slidably connected to the mounting bracket (3).

3. The anti-misoperation mechanism for a circuit breaker in a distribution cabinet according to claim 1, characterized in that: The upper end of the partition (101) is provided with two sets of sliding grooves (102), which are arranged symmetrically.

4. The anti-misoperation mechanism for a circuit breaker in a distribution cabinet according to claim 3, characterized in that: The lower end of the circuit breaker body (2) is rotatably connected to multiple sets of rollers (201), and the rollers (201) correspond to the slide grooves (102).

5. The anti-misoperation mechanism for a circuit breaker in a distribution cabinet according to claim 1, characterized in that: The cabinet (1) has multiple sets of female contacts (103) inside, and the circuit breaker body (2) has multiple sets of female contacts (202) on the rear side. The female contacts (202) correspond to the female contacts (103).

6. The anti-misoperation mechanism for a distribution cabinet circuit breaker according to claim 1, characterized in that: An installation plate (4) is fixedly installed on the lower top surface inside the cabinet (1). A socket (401) is provided on the front side of the installation plate (4). A plug (402) is provided on the upper end of the circuit breaker body (2). The plug (402) and the socket (401) correspond to each other.

7. The anti-misoperation mechanism for a distribution cabinet circuit breaker according to claim 6, characterized in that: Two sets of rotating shafts (501) are fixedly installed on the front side of the mounting plate (4), and a locking bar (502) is rotatably connected to the front side of the rotating shafts (501).

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