CN224123740U - A high-voltage switchgear protection device to prevent misoperation - Google Patents
A high-voltage switchgear protection device to prevent misoperationInfo
- Publication number
- CN224123740U CN224123740U CN202520923547.2U CN202520923547U CN224123740U CN 224123740 U CN224123740 U CN 224123740U CN 202520923547 U CN202520923547 U CN 202520923547U CN 224123740 U CN224123740 U CN 224123740U
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- China
- Prior art keywords
- pin
- spring pin
- protection device
- distribution cabinet
- telescopic unit
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Abstract
A protection device for preventing misoperation of a high-voltage power distribution cabinet belongs to the field of electrical safety protection, and comprises an electromagnetic telescopic unit, wherein the electromagnetic telescopic unit is fixedly arranged in the cabinet body, the electromagnetic telescopic unit is connected with a normally open auxiliary contact of a circuit breaker in the high-voltage power distribution cabinet in series, a spring pin is connected to the cabinet body in a sliding manner, the electromagnetic telescopic unit is used for pushing the spring pin out of the cabinet body, a safety pin is inserted between an existing load isolating switch operating mechanism and an existing isolating handle on the cabinet body, the safety pin is close to the extended spring pin, the extended spring pin is used for blocking the safety pin to be pulled out, when the normally open auxiliary contact of the circuit breaker is reset, the electromagnetic telescopic unit is powered off and retracted, the limit on the safety pin at the existing isolating handle is eliminated, and when the safety pin is not pulled out, the safety accident caused by the fact that the isolating handle falls down can be avoided.
Description
Technical Field
The utility model relates to the technical field of electrical safety protection, in particular to a protection device for preventing misoperation of a high-voltage power distribution cabinet.
Background
In a power supply system of a factory, a high-voltage power distribution cabinet is one of the most basic devices, is the most frequent device operated by operators on duty, and can cause damage to the devices or even endanger the lives of the operators if the operation is improper or not performed according to the switching operation sequence, wherein misoperation which is most likely to occur is that under the condition of loading, the isolating switch is pulled and closed, the safety performance is low, and safety accidents are easy to cause.
The novel high-voltage power distribution cabinet is characterized in that a protection structure is arranged for preventing misoperation of operators, but the old high-voltage power distribution cabinet installed in the power distribution room before is not provided with the protection structure, in order to solve the problem of misoperation of pulling and closing the isolating switch under the condition of load, an electromagnetic lock is arranged on one side of the load isolating switch operating mechanism on the existing high-voltage power distribution cabinet, a pin shaft for limiting an operating handle is arranged on the electromagnetic lock, a limiting hole is formed in the load isolating switch operating mechanism corresponding to the pin shaft, the high-voltage load isolating switch operating mechanism cannot be pulled under the condition of load through the electromagnetic lock, misoperation of pulling the switch under the condition of load is avoided, and the element in the high-voltage power distribution cabinet and the personal safety of operators are effectively protected.
The existing mode of limiting the misoperation of the high-voltage load isolating switch operating mechanism through the electromagnetic lock, the electromagnetic lock is directly matched with the high-voltage load isolating switch operating mechanism through the pin shaft, the isolating handle can be directly operated after the electromagnet is released from the limitation, at the moment, the isolating handle is very easy to automatically drop under the action of gravity, or larger vibration is generated at one moment of a closing breaker to enable the isolating handle to drop, and safety accidents occur.
Disclosure of utility model
In order to solve the technical problem that the prior art limits the misoperation of the high-voltage load isolating switch operating mechanism through the electromagnetic lock, and the isolating handle is extremely easy to drop to cause a safety accident after the electromagnet is released from the limit, the utility model provides the misoperation prevention protection device for the high-voltage power distribution cabinet.
The technical scheme of the utility model is as follows:
The utility model provides a misoperation prevention protection device for a high-voltage power distribution cabinet, which comprises an electromagnetic telescopic unit, wherein the electromagnetic telescopic unit is fixedly arranged in a cabinet body of the high-voltage power distribution cabinet, the electromagnetic telescopic unit is connected with a normally open auxiliary contact of a circuit breaker in the high-voltage power distribution cabinet in series, a spring pin is connected to the cabinet body in a sliding manner, the electromagnetic telescopic unit is used for pushing the spring pin out of the cabinet body, a safety pin is inserted between an existing load isolating switch operating mechanism and an existing isolating handle on the cabinet body, the safety pin is close to the extended spring pin, the extended spring pin is used for blocking the safety pin from being pulled out, the electromagnetic telescopic unit is connected with the normally open auxiliary contact of the circuit breaker in series, the spring pin is pushed out at the moment, the safety pin is blocked from being pulled out, the safety pin can be prevented from misoperation of a load isolating switch under the condition of load, the electromagnetic telescopic unit is retracted under the action of elastic force when the normally open auxiliary contact of the circuit breaker is reset, the safety pin is released from being limited, the existing isolating handle can be operated through pulling out the safety pin, and safety accidents can be avoided when the safety pin is not pulled out.
Preferably, the cabinet body is provided with a mounting hole, the spring pin is transversely arranged in the mounting hole in a sliding manner, one end of the spring pin is close to the electromagnetic telescopic unit, the other end of the spring pin extends out of the cabinet body, the mounting hole is used for providing a sliding track for the spring pin, the spring pin is ensured to stably and accurately transversely extend out of the cabinet body under the driving of the electromagnetic telescopic unit, the action of blocking the safety pin is reliably executed, the operation of the isolation handle is effectively limited at a proper time, and the requirement of preventing misoperation is met.
Preferably, the existing load isolating switch operating mechanism is fixedly arranged on the cabinet body, the existing isolating handle is rotationally connected with the existing load isolating switch operating mechanism through a rotating shaft, a first limiting hole is formed in the existing load isolating switch operating mechanism, two second limiting holes which are arranged up and down oppositely are formed in the existing isolating handle, the two second limiting holes are used for being matched with the first limiting holes independently, the two second limiting holes are matched with the first limiting holes, the position of the isolating handle can be flexibly locked according to different working scenes, the operating convenience is improved, the isolating handle can be firmly limited under various working conditions, the isolating handle is prevented from falling due to accidental shaking or stressed rotation, and the safety control on the operation of the isolating handle is further enhanced.
Preferably, the safety pin is inserted into the first limiting hole and the second limiting hole which are coaxial, and the coaxial installation ensures that the safety pin can firmly limit the relative rotation between the load isolating switch operating mechanism and the isolating handle.
Preferably, the first limiting hole is positioned above the rotating shaft, and when the safety pin is blocked by the spring pin and cannot be pulled out, the isolation handle can be prevented from accidentally falling under the action of gravity or other external forces more effectively, so that the stability of the isolation handle in the operation process of the high-voltage power distribution cabinet is effectively ensured.
Preferably, the spring pin and the first limiting hole are positioned at the same horizontal height, the spring pin is positioned on one side of the first limiting hole, when the electromagnetic telescopic unit pushes out the spring pin, the safety pin can be quickly and effectively prevented from being pulled out, and then the operation of the isolating handle is stably limited, so that the isolating handle is always in a safe locking state before the circuit breaker is allowed to operate.
Preferably, the spring pin comprises a pin body, two ends of the pin body are respectively fixedly provided with a baffle plate, the pin body is sleeved with a spring, the baffles at the two ends prevent the spring from separating, the spring is ensured to work stably, a limiting effect is achieved at the same time, the sliding path of the spring pin is standardized, the spring is endowed with automatic resetting capability, and when the electromagnetic telescopic unit is powered off and retracted, the spring pin can be reset rapidly, so that the reliability of the cyclic work of the protection device is ensured.
Preferably, the safety pin is fixedly provided with a baffle near one end of the spring pin, so that the contact area between the safety pin and the spring pin is increased when the safety pin is rapidly inserted and removed, the blocking stability of the spring pin to the safety pin is improved, the safety pin is difficult to slide out from the blocking range of the spring pin even under complex working conditions or unexpected stress conditions, the operation of the isolation handle is continuously and effectively limited, and the safety and the reliability of the whole device for preventing misoperation are further enhanced.
Preferably, the electromagnetic telescopic unit is of a solenoid electromagnet structure, can rapidly generate thrust to push out the spring pin when the normally open auxiliary contact of the circuit breaker is closed, and can retract in time to cancel the thrust to the spring pin when the contact is reset and powered off, so that the circuit breaker is sensitive and rapid in response, small in size and convenient to install and use.
Preferably, the spring pin is perpendicular to the axis of the safety pin, so that the blocking direction of the spring pin to the safety pin is perpendicular to the inserting and pulling direction of the safety pin, the safety pin can be prevented from being pulled out accidentally in the horizontal direction to the greatest extent, the isolation handle is locked stably, and safety accidents caused by falling of the isolation handle are avoided effectively.
According to the technical scheme, the utility model has the advantages that:
1. When the normally open auxiliary contact of the circuit breaker is reset, the electromagnetic telescopic unit is powered off and retracted, the spring pin is reset under the action of elastic force, the limit on the safety pin at the existing isolation handle is relieved, the existing isolation handle can be operated by pulling out the safety pin, and the safety accident caused by the rotation falling of the isolation handle can be avoided when the safety pin is not pulled out.
2. The two second limiting holes are used for being matched with the first limiting holes independently, the two second limiting holes are matched with the first limiting holes, and the position of the isolating handle can be flexibly locked according to different working scenes, so that the operating convenience is improved, the isolating handle can be stably limited under various working conditions, the isolating handle is prevented from falling due to accidental shaking or rotation caused by stress, and the safety control on the operation of the isolating handle is further enhanced.
3. The safety pin is close to the fixed baffle that is equipped with of one end of spring pin, when having realized the quick cartridge of safety pin and demolishd, the baffle has increased the area of contact of safety pin and spring pin, promotes the stability of stopping of spring pin to the safety pin, even under complicated operating mode or unexpected atress condition, the safety pin also is difficult to follow the range roll-off that stops of spring pin, keeps on effectively restricting isolation handle operation, has further strengthened the security and the reliability that whole device prevented maloperation.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of a protection device for preventing misoperation of a high voltage power distribution cabinet according to one or more embodiments of the present utility model;
FIG. 2 is a schematic side view of a high voltage power distribution cabinet anti-misoperation protection device according to one or more embodiments of the present utility model;
FIG. 3 is a schematic illustration of the structure of an existing isolation handle according to one or more embodiments of the present utility model;
FIG. 4 is a schematic diagram of the electrical principle of the present utility model according to one or more embodiments;
the components represented by the reference numerals in the figures are:
1. The electromagnetic telescopic unit comprises an electromagnetic telescopic unit body, a spring pin, a spring, a pin body, a safety pin, a 6, a rotating shaft, a 7, an existing isolating handle, an 8, an existing load isolating switch operating mechanism, a 9, a first limiting hole, a 10, a second limiting hole, a 11, a cabinet body, a 12, a mounting hole, a 13, a baffle, a 14, an electromagnet coil and a 15, and a normally open auxiliary contact of the circuit breaker.
Detailed Description
In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.
In a typical embodiment of the utility model, as shown in fig. 1-4, a protection device for preventing misoperation of a high-voltage power distribution cabinet is provided, which comprises an electromagnetic telescopic unit 1, a spring pin 2 and a safety pin 5, wherein the electromagnetic telescopic unit 1 is fixedly arranged in the high-voltage power distribution cabinet, a mounting hole 12 is formed in a cabinet body 12 of the high-voltage power distribution cabinet, the spring pin 2 is transversely and slidably arranged in the mounting hole 12, one end of the spring pin 2 is close to the electromagnetic telescopic unit 1, the other end of the spring pin 2 extends out of the cabinet body 11, the spring pin 2 can extend outwards under the control of the electromagnetic telescopic unit 1 and can move towards the inside of the high-voltage power distribution cabinet under the action of a spring 3 to self-reset, the electromagnetic telescopic unit 1 is connected with a normally open auxiliary contact 15 of a circuit breaker in the high-voltage power distribution cabinet in series through a wire, so that when the circuit breaker is closed, the normally open auxiliary contact 15 of the circuit breaker is closed, the electromagnetic telescopic unit 1 is electrically operated to push out the spring pin 2 outwards, the safety pin 5 is used for being transversely inserted between an existing load isolating switch operating mechanism 8 and an existing isolating handle 7, the spring pin 2 and the safety pin 5 are vertically pulled out by the safety pin 5, so that the error of the load is prevented from being pulled out by the safety pin 5.
As shown in fig. 1 and 3, the existing load isolating switch operating mechanism 8 is fixedly installed on the cabinet 11, the existing isolating handle 7 is rotationally connected with the existing load isolating switch operating mechanism 8 through a rotating shaft, a first limiting hole 9 is formed in the existing load isolating switch operating mechanism 8 and located above the rotating shaft 6 for inserting the safety pin 5, two second limiting holes 10 which are oppositely arranged up and down are formed in the existing isolating handle 7, the two second limiting holes 10 are used for being independently matched with the first limiting holes 9 after the existing isolating handle 7 rotates in place, and after the existing isolating handle 7 is pulled/closed in place, the safety pin 5 can be inserted into the coaxial first limiting holes 9 and the second limiting holes 10, further rotation of the existing isolating handle 7 is limited, and the effect of preventing load misoperation is achieved by matching with use of the spring pin 2.
As shown in fig. 1, the mounting hole 12 and the first limiting hole 9 are at the same level, so that the spring pin 2 and the first limiting hole 9 are at the same level, and the spring pin 2 is located at one side of the first limiting hole 9, when the safety pin 5 is inserted into the coaxial first limiting hole 9 and the second limiting hole 10, the safety pin 5 can be blocked by the spring pin 2, so as to limit the safety pin 5 from being pulled out, thereby playing a role in preventing load misoperation.
It can be understood that the first limiting hole 9, the second limiting hole 10 and the mounting hole 12 are all formed in the cabinet body 12, the existing isolating handle 7 and the existing load isolating switch operating mechanism 8 of the existing high-voltage power distribution cabinet directly, so that the old facility can be conveniently transformed, and the transformation and upgrading cost can be reduced.
In this embodiment, the electromagnetic telescopic unit 1 is a solenoid electromagnet structure, and comprises an electromagnet coil 14 and an iron core, as shown in fig. 4, the electromagnet coil 14 is connected in series with a normally open auxiliary contact 15 of a circuit breaker in a high-voltage power distribution cabinet through a wire, so that when the circuit breaker is closed, the normally open auxiliary contact 15 of the circuit breaker is closed, the electromagnetic telescopic unit 1 is electrically operated to push out the spring pin 2 outwards, when the circuit breaker is opened, the normally open auxiliary contact 15 of the circuit breaker is reset, the electromagnetic telescopic unit 1 is powered off and reset, and the spring pin 2 is self-reset under the action of elastic force.
The spring pin 2 comprises a spring 3, a pin body 4 and a baffle 13, wherein two ends of the pin body 4 are respectively fixedly provided with the baffle 13, the size of the baffle 13 is larger than that of a mounting hole 12 on a cabinet body 11, so that the pin body 4 is limited to be pulled out outwards from the mounting hole 12, the spring 3 is sleeved on the pin body 4, the spring 3 is positioned between the cabinet body 11 and the baffle 13 positioned in the cabinet body 11, the spring 3 is compressed when the electromagnetic telescopic unit 1 pushes out the pin body 4 outwards, and the pin body 4 can be self-reset under the action of the spring 3 when the electromagnetic telescopic unit 1 cancels the thrust to the pin body 4.
The safety pin 5 is a T-shaped pin, specifically, the baffle 13 is fixedly arranged at one end, close to the spring pin 2, of the safety pin 5, on the one hand, quick insertion and detachment of the safety pin 5 can be realized, on the other hand, the safety pin 5 can be blocked by the spring pin 2 due to the fact that the spring pin 2 is equal to the first limiting hole 9 in height, so that the safety pin 5 is limited to be pulled out, the effect of preventing misoperation is achieved, meanwhile, when the spring pin 2 returns, the safety pin 5 can be used for continuously limiting rotation of the existing isolation handle 7, the existing isolation handle 7 can be rotated only after the safety pin 5 is pulled out, and safety accidents caused by automatic falling of the isolation handle 7 are effectively prevented.
It will be appreciated that the baffle 13 may be rectangular, circular, triangular, etc. in shape, and the specific shape may be selected according to practical requirements, and is not limited in this way, as long as it can perform a limiting function.
The specific working principle is as follows:
Pressing a closing button, closing a breaker closing coil to obtain electricity, closing the breaker, closing a normally open auxiliary contact 15 of the breaker, obtaining electricity to suck an electromagnet coil 14, and enabling an electromagnetic telescopic unit 1 to act to link a spring pin 2 on a cabinet body 11 to enable the spring pin 2 to pop up a plane of a power distribution cabinet so as to block a safety pin 5 at an existing isolating handle 7, wherein the safety pin 5 cannot be pulled out at the moment, so that the existing isolating handle 7 cannot be operated in a closing state, the isolating switch cannot be pulled and closed in a loaded state, and finally, the misoperation of the loaded isolating switch is prevented;
When switching operation (during power failure) is carried out, as the existing isolation handle 7 is inserted with the safety pin 5 and blocked by the spring pin 2, the existing isolation handle 7 cannot be operated, so that the function of preventing misoperation is realized, the switching-off button is pressed at the moment, the switching-off coil of the circuit breaker is electrified, the circuit breaker is switched off, meanwhile, the normally open auxiliary contact 15 of the circuit breaker is reset, the electromagnetic telescopic unit 1 is powered off and retracted, the spring pin 2 is reset under the action of elastic force, the limit of the safety pin 5 at the existing isolation handle 7 is relieved, the switching-off operation can be carried out on the isolation switch at the moment, and the misoperation of preventing load, pulling and switching-on the isolation switch is finally realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520923547.2U CN224123740U (en) | 2025-05-12 | 2025-05-12 | A high-voltage switchgear protection device to prevent misoperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520923547.2U CN224123740U (en) | 2025-05-12 | 2025-05-12 | A high-voltage switchgear protection device to prevent misoperation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN224123740U true CN224123740U (en) | 2026-04-14 |
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ID=99392817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520923547.2U Active CN224123740U (en) | 2025-05-12 | 2025-05-12 | A high-voltage switchgear protection device to prevent misoperation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN224123740U (en) |
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2025
- 2025-05-12 CN CN202520923547.2U patent/CN224123740U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant |