35KV circuit breaker

Abstract

The utility model discloses a 35KV circuit breaker, which comprises two insulating support side plates, a fixed support is fixedly connected between the two insulating support side plates, a vacuum arc-extinguishing chamber is arranged on the fixed support, a static contact seat is arranged at the bottom of the fixed support, the opposite surfaces of the two insulating support side plates are fixedly connected with a support frame welding piece, and the support frame welding piece is fixedly connected with the vacuum arc-extinguishing chamber. A movable part is arranged in the supporting frame welding part, a hexagonal rod is rotationally connected to the supporting frame welding part, and a contact crank arm is fixedly connected to the surface of the hexagonal rod. According to the utility model, the hexagonal rod is rotated to drive the contact crank arm to rotate, the surface of the contact crank arm is in sliding connection with the movable part, so that when the contact crank arm rotates, the movable part can be driven to move up and down in cooperation with the limiting rod, and the movable part moves downwards to extrude the movable contact in the vacuum arc-extinguishing chamber to move downwards to be in contact with the static contact; compared with the prior art in which a limiting groove is adopted for driving, complicated limiting grooves and connecting parts are not needed, and the design and manufacturing processes are simplified.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a 35KV circuit breaker. Background Art

[0002] 35KV circuit breaker is a kind of protection equipment for high voltage power system, commonly used in substations, distribution networks and other places. It is mainly used to control and protect the circuit in the power system to prevent equipment damage and personal safety accidents caused by overload, short circuit and ground fault.

[0003] After searching, the Chinese patent with publication number CN 111653458 A discloses a circuit breaker body and a circuit breaker, which drives the limit sleeve through a rotating shaft sleeve and a limit groove is set on the rotating shaft sleeve to achieve the purpose of opening and closing the gate. However, this method is relatively complicated in design and requires precise processing and assembly, which increases the manufacturing cost and process difficulty. Therefore, a 35KV circuit breaker is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a 35KV circuit breaker to solve the problems raised in the above background technology.

[0005] The present application embodiment adopts the following technical solutions:

[0006] A 35KV circuit breaker comprises two insulating support side plates, a fixed bracket is fixedly connected between the two insulating support side plates, a vacuum arc extinguishing chamber is arranged on the fixed bracket, a static contact seat is arranged at the bottom of the fixed bracket, the opposite surfaces of the two insulating support side plates are fixedly connected with a support frame welding piece, a movable part is arranged in the support frame welding piece, a hexagonal rod is rotatably connected to the support frame welding piece, the surface of the hexagonal rod is fixedly connected to a contact elbow, the surface of the contact elbow is slidably connected to the top of the movable part, and the contact elbow rotates to squeeze the movable part to apply pressure to the movable contact of the vacuum arc extinguishing chamber.

[0007] Preferably, the movable part comprises an upper sleeve of a contact seat, an inner wall of the upper sleeve of the contact seat is slidably connected with a slide rod, and the bottom end of the slide rod is fixedly connected with a spring lower contact seat.

[0008] Preferably, a contact spring is sleeved on the surface of the slide rod, the top end of the contact spring is fixedly connected to the lower surface of the contact seat upper sleeve, and the bottom end of the contact spring is fixedly connected to the upper surface of the contact seat under the spring.

[0009] Preferably, a limiting rod is fixedly connected to the surface of the contact seat upper sleeve, a limiting groove is provided on the surface of the support frame welding part, and the surface of the limiting rod is slidably connected to the inner wall of the limiting groove.

[0010] Preferably, a bubble positioning plate is fixedly connected between the two insulating support side plates, and the vacuum arc extinguishing chamber is arranged between the bubble positioning plate and the fixed bracket.

[0011] Preferably, a soft connection is provided at the top of the vacuum arc extinguishing chamber, and the spring lower contact seat is provided at the top of the soft connection.

[0012] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0013] In the utility model, the contact arm can be driven to rotate by rotating the hexagonal rod. Since the surface of the contact arm is slidably connected to the movable part, when the contact arm rotates, it can drive the movable part to move up and down in cooperation with the limit rod. By setting the movable part to move downward, the moving contact in the vacuum arc extinguishing chamber is squeezed to move downward and contact with the static contact, thereby completing the closing work. Compared with the limit groove drive adopted in the prior art, complicated limit grooves and connecting parts are not required, thereby simplifying the design and manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 : A three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 : A three-dimensional structural schematic diagram of the vacuum interrupter of the utility model;

[0017] Figure 3 For: the utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 1. Insulating support side plate; 2. Fixed bracket; 3. Vacuum arc extinguishing chamber; 4. Static contact seat; 5. Support frame welding part; 6. Hexagonal rod; 7. Contact arm; 8. Contact seat upper sleeve; 9. Sliding rod; 10. Spring lower contact seat; 11. Contact spring; 12. Limit rod; 13. Bubble positioning plate; 14. Flexible connection. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0020] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0021] See also Figure 1-3 , the utility model provides a 35KV circuit breaker technical solution:

[0022] A 35KV circuit breaker comprises two insulating support side plates 1, wherein a fixed bracket 2 is fixedly connected between the two insulating support side plates 1, a vacuum arc extinguishing chamber 3 is arranged on the fixed bracket 2, a static contact seat 4 is arranged at the bottom of the fixed bracket 2, and a support frame welding piece 5 is fixedly connected to the opposite surfaces of the two insulating support side plates 1, a movable part is arranged in the support frame welding piece 5, a hexagonal rod 6 is rotatably connected to the support frame welding piece 5, the surface of the hexagonal rod 6 is fixedly connected to a contact crank arm 7, the surface of the contact crank arm 7 is slidably connected to the top of the movable part, the contact crank arm 7 rotates to squeeze the movable part to apply pressure to the moving contact of the vacuum arc extinguishing chamber 3, and the contact crank arm 7 can be driven to rotate by rotating the hexagonal rod 6. Since the surface of the contact crank arm 7 is slidably connected to the moving part, when the contact crank arm 7 rotates, it can drive the movable part to move up and down, and by setting the movable part to move downward, the moving contact in the vacuum arc extinguishing chamber 3 is squeezed to move downward and contact with the static contact, thereby completing the closing work.

[0023] The movable part comprises a contact seat upper sleeve 8, the inner wall of which is slidably connected with a slide rod 9, the bottom end of which is fixedly connected with a spring lower contact seat 10. By providing the spring lower contact seat 10, the moving contact of the vacuum interrupter 3 can be squeezed.

[0024] A contact spring 11 is sleeved on the surface of the slide rod 9, the top end of the contact spring 11 is fixedly connected to the lower surface of the contact seat upper sleeve 8, and the bottom end of the contact spring 11 is fixedly connected to the upper surface of the contact seat 10 under the spring. By setting the contact spring 11, the impact force on the moving contact of the vacuum arc chamber 3 is reduced.

[0025] The surface of the contact seat upper sleeve 8 is fixedly connected to a limiting rod 12, a limiting groove is provided on the surface of the support frame welding part 5, and the surface of the limiting rod 12 is slidably connected to the inner wall of the limiting groove. By setting the limiting rod 12 and the limiting groove, the contact seat upper sleeve 8 is limited to realize its up and down movement.

[0026] A bubble positioning plate 13 is fixedly connected between the two insulating support side plates 1 , and the vacuum arc extinguishing chamber 3 is arranged between the bubble positioning plate 13 and the fixed bracket 2 . The stability of the vacuum arc extinguishing chamber 3 is improved by arranging the bubble positioning plate 13 .

[0027] A soft connection 14 is arranged on the top of the vacuum interrupter 3 , and a spring lower contact seat 10 is arranged on the top of the soft connection 14 .

[0028] Working principle: When the 35KV circuit breaker is in use, when closing the circuit breaker is required, the user first rotates the mechanism clockwise, driving the hexagonal rod 6 to rotate clockwise, the hexagonal rod 6 drives the contact arm 7 to rotate clockwise, the contact arm 7 drives the contact seat upper sleeve 8 to apply pressure downward, so that the spring lower contact seat 10 moves downward and squeezes the moving contact in the vacuum arc chamber 3 to make it contact with the static contact. The current passes through the busbar and then through the soft connection 14 installed on the end face of the moving contact of the vacuum arc chamber 3, and then to the moving contact in the vacuum arc chamber 3 and the static contact in the vacuum arc chamber 3 to close the circuit, completing the closing work. When opening the circuit breaker is required, the mechanism can be rotated counterclockwise. Compared with the limit groove drive used in the prior art, there is no need for complex limit grooves and connecting components, which simplifies the design and manufacturing process.

[0029] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0030] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A 35KV circuit breaker, comprising two insulating support side plates (1), a fixed bracket (2) fixedly connected between the two insulating support side plates (1), a vacuum arc extinguishing chamber (3) arranged on the fixed bracket (2), and a static contact seat (4) arranged at the bottom of the fixed bracket (2), characterized in that: The opposing surfaces of the two insulating support side plates (1) are fixedly connected with a support frame welding piece (5), a movable part is arranged inside the support frame welding piece (5), a hexagonal rod (6) is rotatably connected to the support frame welding piece (5), the surface of the hexagonal rod (6) is fixedly connected with a contact arm (7), the surface of the contact arm (7) is slidably connected to the top of the movable part, and the contact arm (7) rotates to squeeze the movable part to apply pressure to the movable contact of the vacuum arc extinguishing chamber (3).

2. A 35KV circuit breaker according to claim 1, characterized in that: The movable part comprises an upper contact seat sleeve (8), the inner wall of the upper contact seat sleeve (8) is slidably connected to a slide rod (9), and the bottom end of the slide rod (9) is fixedly connected to a spring lower contact seat (10).

3. A 35KV circuit breaker according to claim 2, characterized in that: The surface of the slide rod (9) is sleeved with a contact spring (11), the top end of the contact spring (11) is fixedly connected to the lower surface of the contact seat upper sleeve (8), and the bottom end of the contact spring (11) is fixedly connected to the upper surface of the spring lower contact seat (10).

4. A 35KV circuit breaker according to claim 2, characterized in that: The surface of the contact seat upper sleeve (8) is fixedly connected to a limiting rod (12), the surface of the support frame welding piece (5) is provided with a limiting groove, and the surface of the limiting rod (12) is slidably connected to the inner wall of the limiting groove.

5. A 35KV circuit breaker according to claim 2, characterized in that: A bubble positioning plate (13) is fixedly connected between the two insulating support side plates (1), and the vacuum arc extinguishing chamber (3) is arranged between the bubble positioning plate (13) and the fixed bracket (2).

6. A 35KV circuit breaker according to claim 2, characterized in that: A soft connection (14) is arranged on the top of the vacuum interrupter (3), and the spring lower contact seat (10) is arranged on the top of the soft connection (14).

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