Operating mechanism of high-voltage circuit breaker

Abstract

The utility model discloses a high-voltage circuit breaker operating mechanism, which belongs to the field of high-voltage circuit breaker operating mechanisms and comprises a mounting shell, a rotating rod, a first contact, a second contact, a connecting rod insulator, a sliding block, a pushing inclined plane, a spring bolt, a spring and a driving structure. When the switch needs to be closed, the sliding block is driven by the driving structure to move upwards, then the sliding block drives the connecting rod insulator to rotate, the connecting rod insulator rotates to drive the rotating rod to rotate, the rotating rod rotates to drive the first contact to move, and then the first contact and the second contact are in contact and closed. The pushing inclined surface on the sliding block drives the spring bolt to overcome the elastic force of the spring to move outwards, then the extended spring bolt is convenient for locking the cabinet door, and the insulating property of the action structure is improved due to the action of the connecting rod insulator.

Description

Technical Field

[0001] The utility model relates to the field of operating mechanisms of high-voltage circuit breakers, in particular to an operating mechanism of a high-voltage circuit breaker. Background Technique

[0002] A circuit breaker is a switching device that has the ability to close, carry, and interrupt normal circuit current and handle abnormal circuit current within a preset time limit. According to the application scope, circuit breakers are divided into two categories: high-voltage and low-voltage. High-voltage electrical appliances usually refer to equipment with a working voltage exceeding 3 kV. Power distribution, as a crucial link in the process of electricity generation, transmission, and use, includes a complete system consisting of transformers and various high- and low-voltage electrical equipment. Circuit breakers are an indispensable part of it.

[0003] A circuit breaker mainly consists of core components such as a contact system, an arc extinguishing system, an operating mechanism, a release, and a housing. Its working principle includes short-circuit protection, overload protection, and electronic protection: Short-circuit protection: When a short circuit occurs in the circuit, the magnetic field generated by the suddenly increased large current can overcome the internal counter-force spring of the release, trigger the action of the release, and quickly drive the operating mechanism, causing the circuit breaker to trip instantly and cut off the fault current to prevent the further deterioration of dangerous situations caused by the short circuit. Overload protection: In the case of overload, the circuit current increases, resulting in an increase in heat generation. The built-in bimetallic strip deforms due to the thermal effect. When the deformation reaches the threshold value, the bimetallic strip triggers the operating mechanism, prompting the circuit breaker to disconnect the overloaded circuit and prevent electrical equipment from being damaged due to overheating. Electronic protection: Modern circuit breakers adopt an electronic design and are equipped with current transformers to monitor the current of each phase in real time. The data is transmitted to the microprocessor and compared with the preset safety limit values. If abnormal current (such as overload, underload, or imbalance) is detected, the microprocessor instructs the electronic release to act, and the circuit is cut off through the operating mechanism to achieve precise dynamic control of the current.

[0004] In the prior art, the patent with the patent publication number CN217507240U discloses an operating mechanism of a high-voltage circuit breaker, which relates to the field of high-voltage circuit breakers and aims to solve the problems of inconvenient use and relatively complex overall structure in the prior art. The technical solution adopted is that it includes a servo motor, a second sprocket, a transmission chain, a gear, a rack, a connecting rod, an L-shaped rod, a fixed block, a fixed column, and a horizontal groove. The second sprocket drives the first sprocket to rotate through the transmission chain. The teeth of the gear mesh with the teeth of the rack. Through the connection of the connecting rod, the L-shaped rod moves downward. The limiting rod slides downward in the T-shaped groove on the fixed block. The fixed column slides to the right in the horizontal groove. The rotating part rotates clockwise, driving the second bracket to rotate, and the second contact separates from the first contact on the first bracket, thereby achieving the purpose of disconnection.

[0005] The above prior art solutions solve the problem of automatic on-off of the circuit breaker. However, the above technical solutions use a series of mechanical linkages to achieve on-off operations. Since there are many components and they are relatively close to each other, their insulation performance is poor. Especially for high-voltage circuit breakers, the insulation performance between the moving components is an important condition for their normal operation. Therefore, a high-voltage circuit breaker operating mechanism that solves the above problems is needed. Summary of the Utility Model

[0006] The purpose of the present utility model is to solve the problems raised in the background technology, and a high-voltage circuit breaker operating mechanism is designed.

[0007] To achieve the above purpose, the technical solution of the present utility model is a high-voltage circuit breaker operating mechanism, including an installation shell, a rotating rod, a first contact, a second contact, a connecting rod insulator, a slider, a pushing inclined plane, a locking tongue, a spring, and a driving structure. The rotating rod is rotatably installed in the installation shell. The first contact is installed at the left end of the rotating rod. The second contact is installed on the installation shell. The connecting rod insulator is rotatably connected to the rotating rod. The slider is connected to the connecting rod insulator. The pushing inclined plane is installed on the right side of the slider. The locking tongue is slidably installed on the installation shell. The spring is sleeved on the locking tongue, with one end connected to the locking tongue and the other end connected to the installation shell. A driving structure is provided in the installation shell, and the driving structure is connected to the slider.

[0008] Furthermore, an air compressor is installed at the lower part of the installation shell. A blowing pipe is installed on the air compressor. A switching valve is installed on the blowing pipe. The outlet direction of the blowing pipe faces the upper surface of the second contact.

[0009] Furthermore, the driving structure includes a power motor. The power motor is fixedly installed at the lower part of the installation shell. A driving screw is installed at the output end of the power motor. The driving screw engages and penetrates through the slider. A guide rail is installed on the installation shell. The guide rail vertically slides through the slider.

[0010] Furthermore, the connecting rod insulator is a rod-shaped structure made of the same shape and material as the insulator.

[0011] Furthermore, the installation shell is a shell made of insulating material. Advantageous Effects

[0012] The utility model provides an operating mechanism for a high-voltage circuit breaker, which has the following beneficial effects. Through its structural design, when closing is required, the slider is driven to move upward under the operation of the driving structure. Then, the slider drives the connecting rod insulator to rotate, the rotation of the connecting rod insulator drives the rotating rod to rotate, and the rotation of the rotating rod drives the first contact to move. Thus, the first contact and the second contact come into contact and close. At the same time during this process, the pushing inclined plane on the slider drives the locking tongue to move outward against the spring force, and thus the protruding locking tongue facilitates the locking of the cabinet door. Due to the function of the connecting rod insulator, the insulation performance of the action structure is increased, thereby solving the problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the operating mechanism for the high-voltage circuit breaker of the present utility model.

[0014] In the figure, 1, mounting shell; 2, rotating rod; 3, first contact; 4, second contact; 5, connecting rod insulator; 6, pushing inclined plane; 7, locking tongue; 8, spring; 9, air compressor; 10, blowing pipe; 11, switching valve; 12, power motor; 13, driving screw; 14, guide rail; 51, slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper / lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0017] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided / sleeved with", "socket connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0018] Please refer to Figure 1 , the present utility model provides a technical solution: a high-voltage circuit breaker operating mechanism, which includes an installation shell 1, a rotating rod 2, a first contact 3, a second contact 4, a connecting rod insulator 5, a slider 51, a pushing inclined plane 6, a locking tongue 7, a spring 8, and a driving structure. The rotating rod 2 is rotatably installed inside the installation shell 1. The first contact 3 is installed at the left end of the rotating rod 2. The second contact 4 is installed on the installation shell 1. The connecting rod insulator 5 is rotatably connected to the rotating rod 2. The slider 51 is connected to the connecting rod insulator 5. The pushing inclined plane 6 is installed on the right side of the slider 51. The locking tongue 7 is slidably installed on the installation shell 1. The spring 8 is sleeved on the locking tongue 7, with one end connected to the locking tongue 7 and the other end connected to the installation shell 1. A driving structure is provided inside the installation shell 1, and the driving structure is connected to the slider 51.

[0019] In the present utility model, an air compressor 9 is installed at the lower part of the installation shell 1. A blowing pipe 10 is installed on the air compressor 9. A switching valve 11 is installed on the blowing pipe 10. The outlet direction of the blowing pipe 10 faces the upper surface of the second contact 4. When a closing operation is performed, the switching valve 11 is opened, and then the compressed air in the middle of the air compressor 9 is blown out from the blowing pipe 10 to the gap between the first contact 3 and the second contact 4, thereby playing a certain role in arc extinguishing and dissipating the heat generated after the arc is generated.

[0020] In the present utility model, the driving structure includes a power motor 12. The power motor 12 is fixedly installed at the lower part of the installation shell 1. A driving screw 13 is installed at the output end of the power motor 12. The driving screw 13 engages and penetrates through the slider 51. A guide rail 14 is installed on the installation shell 1. The guide rail 14 vertically slides through the slider 51. When the driving structure works, the power motor 12 drives the driving screw 13 to rotate, and the rotation of the driving screw 13 drives the slider 51 to slide on the guide rail 14.

[0021] In the present utility model, the connecting rod insulator 5 is a rod-shaped structure made of the same shape and material as the insulator, thereby playing an insulating role and preventing the voltage from breaking down the connection structure between the rotating rod 2 and the slider 51.

[0022] In the present utility model, the installation shell 1 is a shell made of insulating material, playing an insulating installation role, and an electrical plastic or ceramic structure is selected.

[0023] Persons skilled in the art shall connect all the electrical components in this case to their adapted power supplies through wires, and should select a suitable controller according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of operations among the electrical components in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of electrical control will be given.

[0024] In this embodiment:

[0025] When the device needs to be closed, the slider 51 is driven to move upward under the action of the driving structure. Then, the slider 51 drives the connecting rod insulator 5 to rotate. The rotation of the connecting rod insulator 5 drives the rotating rod 2 to rotate. The rotation of the rotating rod 2 drives the first contact 3 to move. Then, the first contact 3 and the second contact 4 come into contact and close. During this process, the pushing inclined surface 6 on the slider 51 drives the locking tongue 7 to move outward against the elastic force of the spring 8. Then, the protruding locking tongue 7 facilitates the locking of the cabinet door. Due to the function of the connecting rod insulator 5, the insulation performance of the action structure is increased.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0027] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage circuit breaker operating mechanism, comprising a mounting housing (1), a rotating rod (2), a first contact (3), a second contact (4), a connecting rod insulator (5), a slider (51), a push ramp (6), a locking tongue (7), a spring (8), and a driving structure, characterized in that: A rotating rod (2) is rotatably mounted in the mounting shell (1), a No. 1 contact (3) is mounted on the left end of the rotating rod (2), a No. 2 contact (4) is mounted on the mounting shell (1), a connecting rod insulator (5) is rotatably connected to the rotating rod (2), a slider (51) is connected to the connecting rod insulator (5), a pushing inclined surface (6) is mounted on the right side of the slider (51), a locking tongue (7) is slidably mounted on the mounting shell (1), a spring (8) is sleeved on the locking tongue (7), one end of the spring (8) is connected to the locking tongue (7) and the other end is connected to the mounting shell (1), a driving structure is arranged in the mounting shell (1), and the driving structure is connected to the slider (51).

2. The high voltage circuit breaker operating mechanism according to claim 1, characterized in that: An air compressor (9) is installed at the lower part of the installation shell (1), a blow pipe (10) is installed on the air compressor (9), a switch valve (11) is installed on the blow pipe (10), and the outlet direction of the blow pipe (10) faces the upper surface of the second contact (4).

3. The high voltage circuit breaker operating mechanism according to claim 1, characterized in that: The driving structure comprises a power motor (12), the power motor (12) being fixedly mounted on the lower part of the mounting shell (1), a driving screw (13) being mounted on the output end of the power motor (12), the driving screw (13) being engaged with and penetrating a slider (51), a guide rail (14) being mounted on the mounting shell (1), the guide rail (14) being vertically slidable and penetrating the slider (51).

4. The high voltage circuit breaker operating mechanism according to claim 1, characterized in that: The connecting rod insulator (5) is a rod-shaped structure with the same shape and material as the insulator.

5. The high voltage circuit breaker operating mechanism according to claim 1, characterized in that: The installation shell (1) is a shell made of insulating material.

Images