A circuit breaker emergency opening device

Abstract

The utility model belongs to the technical field of switch cabinet, specifically is a circuit breaker emergency opening device, including body, operating rod, the body is fixed on the switch cabinet through fixed nut, inside through -hole is crossed by operating rod, and is equipped with the mechanism and the false insertion prevention mechanism of check, the baffle of check mechanism is in close contact with the through -hole export under the torsional spring effect, can effectively block dust, humidity and other pollutants, reduce the damage to the electrical components in the switch cabinet, prolong the service life of equipment, reduce maintenance cost, the false insertion prevention mechanism adopts magnetic force control, the third strong magnet of operating rod one end and the first strong magnet in the through -hole interact, drive relevant components open operating channel, only specific operating rod can be inserted, eliminate unauthorized operation, improve equipment safety, guarantee power system stable operation, the utility model effectively solves the existing emergency opening device easy false operation, the problem of insufficient protection etc.

Description

Technical Field

[0001] This utility model belongs to the field of switchgear technology, specifically an emergency tripping device for circuit breakers. Background Technology

[0002] A switchgear is a type of electrical equipment. External power lines first enter the main control switch inside the cabinet, and then enter the branch control switches. Each branch circuit is configured according to its needs. Examples include instruments, automatic control systems, motor magnetic switches, various AC contactors, etc. Some switchgear also have high-voltage and low-voltage compartments, and are equipped with high-voltage busbars, such as in power plants. Some also have underfrequency load shearing features to protect the main equipment.

[0003] When a sudden fault occurs during normal operation of the electrical switchgear, causing a power outage in the secondary control circuit, the main circuit breaker cannot disconnect the main circuit through normal operating procedures. In this case, the emergency tripping device on the switchgear must be used to control the safe tripping of the primary power distribution circuit. When the main circuit breaker is in the normal operating position, the front door of the switchgear is interlocked and cannot be opened at will. At this time, the main circuit breaker can only be tripped by operating the emergency tripping device.

[0004] Current emergency tripping devices have the following drawbacks: First, they lack anti-misinsertion design and can only implement basic operation permission restrictions. Unauthorized tools can easily be inserted, leading to a high risk of misoperation, which may cause power accidents and equipment damage. Second, their internal protective structure is rudimentary and cannot tightly fit the through-hole outlet. In dusty and humid environments, external pollutants can easily enter the switch cabinet, causing corrosion and short circuits of electrical components, significantly shortening equipment life and increasing maintenance costs. This makes it difficult to meet the power system's demand for highly reliable emergency tripping devices. Therefore, an emergency tripping device for circuit breakers is proposed to address the above problems. Utility Model Content

[0005] To address the shortcomings of existing emergency tripping devices, a circuit breaker emergency tripping device is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The emergency tripping device of the circuit breaker described in this utility model includes a body and an operating rod. The body includes an insertion end that is adapted to the mounting hole on the switch cabinet and an end located outside the switch cabinet. The body is fixed to the switch cabinet by a fixing nut. A through hole is opened inside the body for the operating rod to pass through. A blocking mechanism is installed on the body to block the end of the through hole near the inside of the switch cabinet.

[0007] Preferably, the blocking mechanism includes a base mounted on the insertion end, and a baffle is rotatably mounted on the base via a rotating rod and a torsion spring, the initial position of the baffle being close to the through hole outlet.

[0008] Preferably, the end has a locking hole for separating the through hole.

[0009] Preferably, the through hole is provided with an anti-misinsertion mechanism, which includes an assembly groove formed on the inner wall of the through hole. A first strong magnet is assembled in the assembly groove by a spring. A stop plate is also rotatably arranged in the assembly groove by a rotating rod and a torsion spring. The stop plate is provided with a mating groove for accommodating the first strong magnet. A second strong magnet that mates with the first strong magnet is provided in the mating groove.

[0010] Preferably, the first strong magnet is provided with a guide wheel, and the inner wall of the assembly groove is provided with a guide groove that cooperates with the guide wheel.

[0011] Preferably, the assembly groove is provided with a limiting block for limiting the end of the stroke of the first strong magnet.

[0012] Preferably, the anti-misinsertion mechanism is provided with an array of elements distributed in a ring at equal intervals on the inner wall of the through hole.

[0013] Preferably, one end of the operating lever is provided with a third strong magnet that cooperates with the first strong magnet to drive its movement.

[0014] Preferably, the operating end of the operating lever is provided with a U-shaped bend.

[0015] The beneficial effects of this utility model are:

[0016] 1. The anti-misinsertion mechanism of this utility model adopts a magnetic control method. Only the operating rod equipped with a specific third strong magnet can generate a magnetic force with the first strong magnet to drive the anti-misinsertion mechanism to open the channel. This design fundamentally eliminates the possibility of unauthorized operation, reduces the risk of misoperation to an extremely low level, provides a reliable guarantee for the stable operation of the power system, and achieves a level of safety protection that is difficult to reach with existing technologies.

[0017] 2. Under normal conditions, the baffle of this utility model tightly fits the outlet of the through hole under the action of the torsion spring, forming a solid barrier. This design can effectively block external pollutants and moisture, greatly reduce damage to internal electrical components, significantly extend the service life of the equipment, reduce maintenance costs, and improve the overall stability of the power system. Compared with the prior art, it has obvious protective advantages. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a three-dimensional structural view of the entire utility model;

[0020] Figure 2 This is a sectional view of the main body and operating lever of this utility model;

[0021] Legend:

[0022] 1. Body; 101. Insertion end; 102. End; 2. Operating rod; 201. Third strong magnet; 202. U-shaped bend; 3. Fixing nut; 4. Through hole; 5. Blocking mechanism; 501. Base; 502. Baffle; 6. Lock hole; 7. Anti-misinsertion mechanism; 701. Assembly groove; 702. Spring; 703. First strong magnet; 704. Mating groove; 705. Second strong magnet; 706. Guide wheel; 707. Guide groove; 708. Limiting block; 709. Abutment plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] Please see Figures 1-2 The present invention discloses an emergency tripping device for a circuit breaker, comprising a body 1 and an operating rod 2. The body 1 includes an insertion end 101 adapted to the mounting holes on the switch cabinet, and an end 102 located outside the switch cabinet. The body 1 is fixed to the switch cabinet by a fixing nut 3. The body 1 has a through hole 4 for the operating rod 2 to pass through. The body 1 is equipped with a blocking mechanism 5 for blocking one end of the through hole 4 near the inside of the switch cabinet. The blocking mechanism 5 includes a base 501 mounted on the insertion end 101. A baffle 502 is rotatably mounted on the base 501 by a rotating rod and a torsion spring. The initial position of the baffle 502 is close to the outlet of the through hole 4.

[0026] An anti-misinsertion mechanism 7 is provided in the through hole 4. The anti-misinsertion mechanism 7 includes an assembly groove 701 formed in the inner wall of the through hole 4. A first strong magnet 703 is assembled in the assembly groove 701 by means of a spring 702. A stop plate 709 is also rotatably arranged in the assembly groove 701 by means of a rotating rod and a torsion spring. A mating groove 704 is formed on the stop plate 709 for accommodating the first strong magnet 703. A second strong magnet 705 that mates with the first strong magnet 703 is provided in the mating groove 704.

[0027] The first strong magnet 703 is provided with a guide wheel 706, and the inner wall of the assembly groove 701 is provided with a guide groove 707 that cooperates with the guide wheel 706. The anti-misinsertion mechanism 7 is provided with an array of numbers distributed in a ring at equal intervals on the inner wall of the through hole 4. One end of the operating rod 2 is provided with a third strong magnet 201 that cooperates with the first strong magnet 703 to drive its movement. During operation, the insertion end 101 of the body 1 is adapted to the assembly hole on the switch cabinet door panel. After it is inserted into the assembly hole, the body 1 is fixed to the switch cabinet door panel by the fixing nut 3. When an emergency trip is required, the operator needs to pass the operating rod 2 through the through hole 4 on the body 1. Before this, the baffle 502 on the blocking mechanism 5 abuts against the outlet of the through hole 4, effectively blocking the circuit breaker. Dust, debris, and moisture can enter the switchgear. When the operator performs a tripping operation, the operating rod 2 is inserted into the through hole 4. A magnetic force is generated between the third strong magnet 201 at one end of the operating rod 2 and the first strong magnet 703 in the mounting groove 701 on the inner wall of the through hole 4. This magnetic force drives the first strong magnet 703 to move along the guide groove 707. The guide wheel 706 rolls in the guide groove 707 to ensure that the first strong magnet 703 can move smoothly and accurately. The first strong magnet 703 approaches the abutment plate 709. Due to the torsion spring on it, the abutment plate 709 is always protruding from the mounting groove 701 in its initial position. The first strong magnet 703 gradually approaches the second magnet 705. The two interact, and the resulting magnetic force causes the abutment plate 709 to move closer to the second magnet 705. 09 rotates around the rotating rod. When the abutment plate 709 enters the assembly groove 701, the first strong magnet 703 also inserts into the mating groove 704. At this time, the first strong magnet 703 and the second strong magnet 705 attract each other, thus opening the channel for the insertion of the operating rod 2. The abutment plate 709 no longer obstructs the operating rod 2, and the operating rod 2 continues to be inserted. The operating rod 2 will apply an external force to the baffle 502, overcoming the torsion force of the torsion spring, thereby pushing open the baffle 502, allowing the operating rod 2 to smoothly enter the switch cabinet for tripping operation. When the operation is completed and the operating rod 2 is pulled out, the same principle applies: the third strong magnet 201 attracts the first strong magnet 703 to return, and with the cooperation of the spring 702, it returns to its original position along the guide groove 707, thereby preventing the operation from being interrupted. The mis-insertion mechanism 7 resets, and the blocking mechanism 5 of this utility model effectively protects the components inside the switchgear. External factors such as dust, debris, and moisture may cause corrosion, short circuits, and other damage to the electrical components inside the switchgear. The blocking mechanism 5 can greatly reduce the occurrence of these damages, which helps to extend the service life of the equipment, reduce maintenance costs, and improve the stability of the power system. The anti-mis-insertion mechanism 7 ensures that only specific operating rods 2 can be inserted through magnetic control, effectively avoiding misoperation or malicious operation by unauthorized personnel. In the power system, misoperation may lead to serious consequences, such as power outages, equipment damage, or even personal injury. The setting of the anti-mis-insertion mechanism 7 can greatly improve the safety of the equipment and ensure the normal operation of the power system.

[0028] Furthermore, the assembly groove 701 is provided with a limiting block 708 for limiting the end of the stroke of the first strong magnet 703; during operation, when the first strong magnet 703 moves along the guide groove 707 under the magnetic force of the third strong magnet 201, when the first strong magnet 703 moves to the end of its stroke, the limiting block 708 will block the first strong magnet 703 from continuing to move, thereby limiting its maximum movement distance, so that the first strong magnet 703 can correctly enter the mating groove 704 without exceeding the range, and prevent the first strong magnet 703 from moving excessively.

[0029] Furthermore, the end 102 is provided with a locking hole 6 for separating the through hole 4. During operation, a matching lock can be inserted into the locking hole 6. When the lock is locked, it prevents the operating rod 2 from being inserted into the through hole 4. Only when a circuit breaker operation is required can the operator use the corresponding key to open the lock and release the blockage of the through hole 4, allowing the operating rod 2 to be inserted smoothly. This adds a layer of security to the equipment. In the power system, unauthorized personnel's misoperation may have serious consequences. The restriction of the locking hole 6 can effectively prevent unprofessional personnel from operating the equipment at will, reduce the risk of misoperation, and ensure the safe operation of the power system.

[0030] Furthermore, the operating end of the operating lever 2 is provided with a U-shaped bend 202; during operation, the design of the U-shaped bend 202 conforms to the ergonomic principle, and when the operator holds the U-shaped bend 202, the force on the hand is more even. This design allows the operator to apply force more easily when operating the operating lever 2, and to better control the insertion and withdrawal direction of the operating lever 2.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A circuit breaker emergency opening device, characterized by: Includes a body (1) and an operating lever (2). The body (1) includes an insertion end (101) that matches the mounting holes on the switch cabinet, and an end (102) located outside the switch cabinet. The body (1) is fixed to the switch cabinet by a fixing nut (3). The body (1) has a through hole (4) for the operating lever (2) to pass through. The body (1) is equipped with a blocking mechanism (5) that blocks the end of the through hole (4) near the inside of the switch cabinet. An anti-misinsertion mechanism (7) is provided in the through hole (4). The anti-misinsertion mechanism (7) includes an assembly groove (701) opened in the inner wall of the through hole (4). A first strong magnet (703) is assembled in the assembly groove (701) by means of a spring (702). A stop plate (709) is also rotatably provided in the assembly groove (701) by means of a rotating rod and a torsion spring. A mating groove (704) for accommodating the first strong magnet (703) is opened on the stop plate (709). A second strong magnet (705) that mates with the first strong magnet (703) is provided in the mating groove (704). When the operating rod (2) is pulled out, the third strong magnet (201) attracts the first strong magnet (703) to return and, with the cooperation of the spring (702), returns to its original position along the guide groove (707), thereby resetting the anti-misinsertion mechanism (7).

2. The emergency trip device for a circuit breaker of claim 1, wherein: The blocking mechanism (5) includes a base (501) mounted on the insertion end (101), and a baffle (502) is rotatably mounted on the base (501) via a rotating rod and a torsion spring. The initial position of the baffle (502) is close to the outlet of the through hole (4).

3. The emergency trip device for a circuit breaker of claim 1, wherein: The end (102) is provided with a lock hole (6) for separating the through hole (4).

4. The emergency trip device for a circuit breaker of claim 1, wherein: The first strong magnet (703) is provided with a guide wheel (706), and the inner wall of the assembly groove (701) is provided with a guide groove (707) that cooperates with the guide wheel (706).

5. The emergency trip device for a circuit breaker of claim 1, wherein: The assembly slot (701) is provided with a limiting block (708) for limiting the end of the stroke of the first strong magnet (703).

6. The emergency trip device for a circuit breaker of claim 1, wherein: The anti-misinsertion mechanism (7) is provided with an array of numbers that are equidistantly distributed in a ring on the inner wall of the through hole (4).

7. The emergency trip device for a circuit breaker of claim 1, wherein: One end of the operating lever (2) is provided with a third strong magnet (201) that cooperates with the first strong magnet (703) to drive its movement.

8. The emergency trip device for a circuit breaker of claim 1, wherein: The operating end of the operating lever (2) is provided with a U-shaped bend (202).

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