Insulating cylinder assembling structure of circuit breaker

Abstract

The utility model provides an insulating cylinder assembling structure of a circuit breaker, which comprises an insulating cylinder body, an inner cavity of the insulating cylinder body is provided with an upper wire outlet end, one side of the upper wire outlet end is provided with a static contact assembly, the static contact assembly comprises a static wire outlet seat, the bottom of the static wire outlet seat is provided with an inner sawtooth butterfly-shaped gasket, and the inner sawtooth butterfly-shaped gasket is provided with an outer sawtooth butterfly-shaped gasket. The outer wall of the inner sawtooth butterfly gasket is sleeved with a piston ring, the bottom of the inner sawtooth butterfly gasket is provided with a static contact finger inner sleeve, the outer wall of the static contact finger inner sleeve is provided with a static contact finger, the static outgoing line seat is provided with a static arc contact, and the bottom of the static contact assembly is provided with a moving contact assembly. The sealing structure assembly, the sealing ring arranged at the bottom of the sealing piece front cover plate and the sealing piece rear cover plate can play a role in preventing leakage of sulfur hexafluoride gas in a multi-layer mode, and a good sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an insulating cylinder assembly structure of a sulfur hexafluoride circuit breaker. Background Technique

[0002] The insulating cylinder assembly structure of a circuit breaker refers to the key components and their assembly methods inside the circuit breaker that are used to support, isolate, and protect electrical components, while ensuring good insulation performance in a high-voltage environment. This structure usually consists of an insulating cylinder body made of insulating material and various electrical components and auxiliary components installed inside the insulating cylinder.

[0003] When the circuit breaker receives a tripping signal, the linkage mechanism drives the moving contact to separate from the static contact, generating an arc. At this time, sulfur hexafluoride gas quickly surrounds the arc and extinguishes the arc through its excellent arc extinguishing performance. At the same time, the insulating cylinder body maintains high insulation performance to prevent current leakage and short circuits. During the closing process, the linkage mechanism drives the moving contact to closely contact the static contact to form a conductive path. Throughout the process, the insulating cylinder assembly structure ensures the safe and reliable operation of the circuit breaker through its insulation, isolation, sealing, and fixing functions.

[0004] Currently, there may be a problem of poor contact when the static contact and the moving contact of the circuit breaker are closed, and the current sealing effect inside the circuit breaker is not ideal, resulting in easy leakage of sulfur hexafluoride gas. Content of the Utility Model

[0005] The utility model aims at the above problems and provides an insulating cylinder assembly structure of a circuit breaker with a simple structure and improved reliability.

[0006] The utility model provides the following technical solution: an insulating cylinder assembly structure of a circuit breaker, including an insulating cylinder body. An upper outgoing line end is arranged in the inner cavity of the insulating cylinder body. A static contact assembly is arranged on one side of the upper outgoing line end. The static contact assembly includes a static outgoing line seat. An inner serrated disc spring is arranged at the bottom of the static outgoing line seat. A piston ring is sleeved on the outer wall of the inner serrated disc spring. A static contact finger inner sleeve is arranged at the bottom of the inner serrated disc spring. Static contact fingers are arranged on the outer wall of the static contact finger inner sleeve. A static arc contact is arranged on the static outgoing line seat. A moving contact assembly is arranged at the bottom of the static contact assembly.

[0007] An upper inlet pipe is arranged on the outer surface of the insulating cylinder body. An upper wiring head is arranged on the inner wall of the upper inlet pipe. One end of the upper wiring head far away from the upper inlet pipe is fixedly connected with the top of the static contact assembly through a pin.

[0008] A pressure relief channel is arranged on the outer surface of the insulating cylinder body. An explosion-proof membrane is arranged on one side of the pressure relief channel far away from the insulating cylinder body. An explosion-proof mounting plate is arranged on one side of the explosion-proof membrane far away from the pressure relief channel.

[0009] A sealing structure assembly is provided at the bottom of the insulating cylinder body. The sealing structure assembly includes a front sealing cover plate. A sealing ring is provided at the bottom of the front sealing cover plate. A piston rod sealing cover plate is provided at the bottom of the sealing structure assembly. A rear sealing cover plate is provided at the bottom of the piston rod sealing cover plate.

[0010] A lower wiring pipe is provided on the outer surface of the insulating cylinder body. A lower wiring head is provided on the inner wall of the lower wiring pipe. An upper insulating cover plate is provided at the top of the insulating cylinder body.

[0011] A contact tube is provided in the inner cavity of the moving contact assembly. Two corresponding connecting plates are provided at the bottom of the contact tube. An insulating pin is provided between the two connecting plates.

[0012] An air-operated piston rod is provided at one end of the two connecting plates away from the contact tube. A telescopic cylinder is provided in the inner cavity of the sealing structure assembly. The air-operated piston rod is fixedly connected to the output end of the telescopic cylinder. An inflation valve seat is provided at the bottom of the sealing structure assembly.

[0013] The utility model improves the tightness of the contact between the moving contact and the static contact finger during closing, and enhances the conductivity and stability of the connection.

[0014] Through the sealing structure assembly provided by the device, the sealing ring provided at the bottom of the front sealing cover plate, and the rear sealing cover plate, it can play a role in preventing the leakage of sulfur hexafluoride gas in multiple layers, and achieve a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model,

[0017] Figure 2 is a schematic diagram of the bottom structure of the present utility model,

[0018] Figure 3 is a schematic diagram of the left side structure of the present utility model,

[0019] Figure 4 is a schematic diagram of the internal structure of the present utility model;

[0020] In the figure: 1. Insulating cylinder body; 2. Upper insulating cover plate; 3. Upper inlet pipe; 4. Upper terminal; 5. Lower terminal pipe; 6. Lower terminal; 7. Inner serrated butterfly gasket; 8. Pneumatic piston rod; 9. Front sealing cover plate; 10. Rear sealing cover plate; 11. Piston rod sealing cover plate; 12. Inflation valve seat; 13. Explosion-proof membrane; 14. Explosion-proof mounting plate; 15. Connecting plate; 16. Insulating pin; 17. Contact tube; 18. Pressure relief channel; 19. Upper outgoing terminal; 20. Static contact assembly; 21. Moving contact assembly; 22. Sealing ring; 23. Piston ring; 24. Sealing structure assembly; 25. Static outgoing seat; 26. Inner sleeve of static contact finger; 27. Static contact finger; 28. Static arc contact. Specific embodiments

[0021] To make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0022] Referring to Figures 1-4 , which is the first embodiment of the present utility model, there is provided an insulating cylinder assembly structure of a circuit breaker, including an insulating cylinder body 1. An upper outgoing terminal 19 is arranged in the inner cavity of the insulating cylinder body 1. A static contact assembly 20 is arranged on one side of the upper outgoing terminal 19. A piston ring 23 is arranged in the static contact assembly 20. The static contact assembly 20 includes a static outgoing seat 25. Components such as static contact fingers 27 and inner sleeves 26 of static contact fingers are installed on the static outgoing seat 25. A static arc contact 28 is also arranged through the static outgoing seat 25 for cooperating with a moving arc contact during opening to extinguish the arc. An inner serrated butterfly gasket 7 is arranged at the bottom of the static outgoing seat 25. The piston ring 23 is sleeved on the outer wall of the inner serrated butterfly gasket 7. An inner sleeve 26 of a static contact finger is arranged at the bottom of the inner serrated butterfly gasket 7. The inner sleeve 26 of the static contact finger made of stainless steel is used to support the static contact finger 27 to ensure that the guiding head can reliably enter the inner cavity of the static contact finger 27 during closing. The outer wall of the inner sleeve 26 of the static contact finger is provided with the static contact finger 27, which is usually made of stainless steel and is treated with copper electroplating silver to enhance the conductivity. The design of the static contact finger 27 includes an inward arc convex part, which not only increases the strength of the contact finger but also facilitates placing a spring ring in the outer groove on its side to slightly tighten the contact finger to ensure the reliability of contact with the outer moving contact during closing. A static arc contact 28 is arranged on the static outgoing seat 25, and a moving contact assembly 21 is arranged at the bottom of the static contact assembly 20.

[0023] The main function of the inner sleeve of the static contact finger is to support the static contact finger so that the moving contact arranged in the moving contact assembly can well enter the inner cavity of the static contact finger during closing. The inward arc convex part of the static contact finger is for placing a spring ring in the outer groove on its side to slightly tighten it to ensure the closing reliability.

[0024] The moving contact assembly 21 includes a guiding head. A moving contact is provided at the bottom of the guiding head, corresponding to the static contact. The moving contact moves during the opening and closing processes of the circuit breaker, making contact with or separating from the static contact. A moving arc contact is provided on the moving contact, and a moving arc contact sleeve is sleeved outside the moving arc contact. A moving contact pull rod passes through the moving arc contact. A pressure air valve is provided on the outer wall of the moving contact assembly 21.

[0025] An upper inlet pipe 3 is provided on the outer surface of the insulating cylinder body 1. An upper wiring terminal 4 is provided on the inner wall of the upper inlet pipe 3 for connecting with the static contact assembly 20. One end of the upper wiring terminal 4 away from the upper inlet pipe 3 is fixedly connected to the top of the static contact assembly 20 through a pin.

[0026] A pressure relief channel 18 is provided on the outer surface of the insulating cylinder body 1. An explosion-proof membrane 13 is provided on one side of the pressure relief channel 18 away from the insulating cylinder body 1. An explosion-proof mounting plate 14 is provided on one side of the explosion-proof membrane 13 away from the pressure relief channel 18 for pressure relief during closing.

[0027] Refer to Figures 1-4 As the second embodiment of the present utility model, the difference between this embodiment and the first embodiment is that a sealing structure assembly 24 is provided at the bottom of the insulating cylinder body 1. The sealing structure assembly 24 includes a sealing part front cover plate 9. A sealing ring 22 is provided at the bottom of the sealing part front cover plate 9. A piston rod sealing cover plate 11 is provided at the bottom of the sealing structure assembly 24. A sealing part rear cover plate 10 is provided at the bottom of the piston rod sealing cover plate 11 for preventing the leakage of sulfur hexafluoride gas and the intrusion of moisture.

[0028] A lower wiring pipe 5 is provided on the outer surface of the insulating cylinder body 1. A lower wiring terminal 6 is provided on the inner wall of the lower wiring pipe 5 for connecting with the static contact assembly 20. An upper insulating cover plate 2 is provided at the top of the insulating cylinder body 1.

[0029] A contact tube 17 is provided in the inner cavity of the moving contact assembly 21. Two corresponding connecting plates 15 are provided at the bottom of the contact tube 17. An insulating pin 16 is provided between the two connecting plates 15 to connect the two connecting plates 15 through the insulating pin 16.

[0030] An air-operated piston rod 8 is provided at one end of the two connecting plates 15 away from the contact tube 17. A telescopic cylinder is provided in the inner cavity of the sealing structure assembly 24. The air-operated piston rod 8 is fixedly connected to the output end of the telescopic cylinder. An air filling valve seat 12 is provided at the bottom of the sealing structure assembly 24 for filling and supplementing sulfur hexafluoride gas. The remaining structures are the same as those in Embodiment 1.

[0031] The working process of the present utility model is as follows: When the circuit breaker is in the closed state, the moving contact within the moving contact assembly 21 is in close contact with the static contact within the static contact assembly 20, forming an electrical conduction path. At this time, the sulfur hexafluoride gas within the insulating cylinder body 1 is in a static state and mainly functions as insulation. When it is necessary to disconnect the circuit, the circuit breaker performs a tripping operation. At this time, the driving moving contact is separated from the static contact, generating an arc. The arc is generated and burns within the insulating cylinder body 1. At the same time, the moving contact drives the piston to compress the air, causing the sulfur hexafluoride gas to be compressed and generating a high-pressure gas flow. The high-pressure gas flow longitudinally blows the arc through the insulating nozzle, rapidly reducing the arc temperature and cutting off the current, thereby realizing the tripping function of the circuit breaker. After the arc is extinguished, the sulfur hexafluoride gas within the insulating cylinder body 1 continues to function as insulation, preventing discharge or short-circuit phenomena from occurring inside the circuit breaker. The sealing structure assembly 24 provided at the bottom of the insulating cylinder body 1, the sealing ring 22 provided at the bottom of the front cover plate 9 of the seal, and the rear cover plate 10 of the seal can play a role in preventing the leakage of sulfur hexafluoride gas in multiple layers, achieving a good sealing effect. When the pressure of the sulfur hexafluoride gas drops to a certain value, the sulfur hexafluoride gas can be supplemented in a timely manner through the gas filling valve seat 12 to maintain the normal operation of the circuit breaker.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. An insulating cylinder assembly structure of a circuit breaker, including an insulating cylinder body (1), characterized in that: An upper outgoing terminal (19) is arranged in the inner cavity of the insulating cylinder body (1). A static contact assembly (20) is arranged on one side of the upper outgoing terminal (19). The static contact assembly (20) includes a static outgoing seat (25). An inner serrated butterfly gasket (7) is arranged at the bottom of the static outgoing seat. A piston ring (23) is sleeved on the outer wall of the inner serrated butterfly gasket (7). A static contact finger inner sleeve (26) is arranged at the bottom of the inner serrated butterfly gasket (7). Static contact fingers (27) are arranged on the outer wall of the static contact finger inner sleeve (26). A static arc contact (28) is arranged on the static outgoing seat (25). A moving contact assembly (21) is arranged at the bottom of the static contact assembly (20).

2. The insulating cylinder assembly structure of a circuit breaker according to claim 1, characterized in that: An upper inlet pipe (3) is arranged on the outer surface of the insulating cylinder body (1). An upper connection head (4) is arranged on the inner wall of the upper inlet pipe (3). One end of the upper connection head (4) far from the upper inlet pipe (3) is fixedly connected with the top of the static contact assembly (20) through a pin.

3. The insulating cylinder assembly structure of a circuit breaker according to claim 1, characterized in that: A pressure relief channel (18) is arranged on the outer surface of the insulating cylinder body (1). An explosion-proof film (13) is arranged on one side of the pressure relief channel (18) far from the insulating cylinder body (1). An explosion-proof mounting plate (14) is arranged on one side of the explosion-proof film (13) far from the pressure relief channel (18).

4. The insulating cylinder assembly structure of a circuit breaker according to claim 1, characterized in that: A sealing structure assembly (24) is arranged at the bottom of the insulating cylinder body (1). The sealing structure assembly (24) includes a sealing part front cover plate (9). A sealing ring (22) is arranged at the bottom of the sealing part front cover plate (9). A piston rod sealing cover plate (11) is arranged at the bottom of the sealing structure assembly (24). A sealing part rear cover plate (10) is arranged at the bottom of the piston rod sealing cover plate (11).

5. The insulating cylinder assembly structure of a circuit breaker according to claim 1, characterized in that: A lower connection pipe (5) is arranged on the outer surface of the insulating cylinder body (1). A lower connection head (6) is arranged on the inner wall of the lower connection pipe (5). An upper insulating cover plate (2) is arranged at the top of the insulating cylinder body (1).

6. The insulating cylinder assembly structure of a circuit breaker according to claim 4, characterized in that: A contact pipe (17) is arranged in the inner cavity of the moving contact assembly (21). Two corresponding connecting plates (15) are arranged at the bottom of the contact pipe (17). An insulating pin (16) is arranged between the two connecting plates (15).

7. The insulating cylinder assembly structure of a circuit breaker according to claim 6, characterized in that: One ends of the two connecting plates (15) far from the contact pipe (17) are provided with a pneumatic piston rod (8). A telescopic cylinder is arranged in the inner cavity of the sealing structure assembly (24). The pneumatic piston rod (8) is fixedly connected with the output end of the telescopic cylinder. An air filling valve seat (12) is arranged at the bottom of the sealing structure assembly (24).

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