Circuit breaker arc extinguish chamber structure
By setting up multiple chambers and a flow cover in the circuit breaker arc extinguishing chamber to accommodate arc decomposition, the corrosion problem of arc decomposition on circuit breaker components is solved, ensuring that the insulation performance of the circuit breaker is not affected.
Patent Information
- Application Number
- CN202422173756.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-05
AI Technical Summary
When the existing circuit breaker is broken, the arc decomposition has a great impact on the corrosion of the conductor and insulators, especially in humid environments, which will change the local electric field distribution and affect the insulation performance.
A circuit breaker arc extinguishing chamber structure is designed, including a static end component and a movable end component. By providing a plurality of chambers and a flow shield, the arc decomposition is accommodated in the static end accommodation chamber and a movable end accommodation chamber to prevent it from contacting the components.
The corrosion effect of arc decomposition on static and dynamic components is effectively avoided, and the insulation performance of the circuit breaker is maintained stably.
Smart Images
Figure CN223181019U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a circuit breaker structure, in particular to an arc extinguishing chamber structure of a circuit breaker. Background Art
[0002] When the existing circuit breaker trips, it blows out the arc through an inert gas (generally sulfur hexafluoride gas), and a certain amount of arc decomposition products will be generated during the process of extinguishing the arc. However, the arc decomposition products have a certain corrosiveness and will corrode the conductor and the insulator to a certain extent. Especially when the moisture increases, the damp arc decomposition products scattered on the surface of the insulator and the conductor are likely to change the local electric field distribution and increase the local field strength, which is likely to have an adverse impact on the insulation performance of the circuit breaker.
[0003] In view of the existence of the above problems, it is necessary to study an arc extinguishing chamber structure of a circuit breaker, which can effectively avoid the adverse effects caused by arc decomposition products. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an arc extinguishing chamber structure of a circuit breaker, which can effectively avoid the adverse effects caused by arc decomposition products.
[0005] To achieve the above purpose, the solution of the utility model is as follows:
[0006] An arc extinguishing chamber structure of a circuit breaker, which includes a body, a static end component and a moving end component arranged in the body; the static end component includes a static end support cylinder, a static contact seat, a static arc contact and a static main contact arranged in the static end support cylinder, the static arc contact and the static main contact are fixed to the static contact seat and the static main contact sleeves the static arc contact; the moving end component includes a moving end support seat, a moving end support cylinder, a moving contact seat, a moving end nozzle, a moving end pressure cylinder, a moving arc contact and a moving main contact; the moving arc contact and the moving main contact are fixed to the moving contact seat and the moving main contact sleeves the moving arc contact, the moving arc contact and the moving main contact are respectively in movable contact with the static arc contact and the static main contact, the moving end nozzle is fixed at the opening of the moving main contact and the moving end nozzle movably sleeves the static arc contact, the moving end pressure cylinder is movably sleeved with the moving contact seat and the moving arc contact and a first chamber communicating with the moving end nozzle is formed among the moving end pressure cylinder, the moving contact seat and the moving arc contact, the moving end support cylinder sleeves the moving contact seat, the moving arc contact and the moving main contact and the moving end support cylinder is connected to the static end support cylinder through an insulating support cylinder, the moving end support seat is connected to the moving end pressure cylinder and the moving end support cylinder and sleeves the moving arc contact, a second chamber communicating with the first chamber is formed among the moving end support seat, the moving end pressure cylinder and the moving arc contact, the moving arc contact is a hollow joint, and a contact air hole and a support air hole communicating with the second chamber are respectively formed in the side wall of the moving arc contact and the side wall of the moving end support seat; the body is provided with a static end accommodation chamber and a moving end accommodation chamber, the static end support cylinder is connected to the body and the inner cavity of the static end support cylinder communicates with the static end accommodation chamber, the moving end support seat is connected to the body through a moving end connection cylinder, the second chamber communicates with the moving end accommodation chamber through the inner cavity of the moving end connection cylinder, the moving end support seat is further connected to the body through a connection component, a third chamber communicating with the moving end accommodation chamber is formed between the connection component and the moving end support cylinder and the moving end connection cylinder, and the third chamber communicates with the second chamber through the support air hole.
[0007] The static end support cylinder is connected to the body through a static end flow guide cover, the inner cavity of the static end flow guide cover communicates the inner cavity of the static end support cylinder with the static end accommodation chamber, and the inner diameter of the static end flow guide cover is gradually enlarged along the direction from the static end support cylinder to the static end accommodation chamber.
[0008] The static end flow guide cover is made of insulating material.
[0009] The connection component includes a connected moving end current limiting cover and a moving end flow guide cover, the moving end current limiting cover is connected to the moving end support cylinder and is opposite to the support air hole, the moving end flow guide cover is connected to the body and the inner diameter of the moving end flow guide cover is gradually enlarged along the direction from the third chamber to the moving end accommodation chamber.
[0010] The moving end current limiting cover is made of metal material and is in a cylindrical shape.
[0011] The moving end flow guide cover and the moving end connection cylinder are made of insulating material.
[0012] After adopting the above solution, when the circuit breaker opens, the inert gas in the first chamber will be ejected from the moving-end nozzle to blow out the arc generated between the moving arc contact and the static arc contact. During the process of arc extinction, a certain number of arc decomposition products will be generated. Thereafter, a part of the inert gas will drive part of the arc decomposition products to enter the static-end accommodation chamber from the inner cavity of the static-end support cylinder, and the other part of the inert gas will drive the remaining arc decomposition products to enter the moving-end accommodation chamber through the first chamber, the second chamber, the inner cavity of the moving-end connecting cylinder and the third chamber. In this way, the generated arc decomposition products will be accommodated in the moving-end accommodation chamber and the static-end accommodation chamber, thus avoiding the adverse effects of the arc decomposition products on the moving-end components and the static-end components. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 FIG. is a schematic diagram of the present utility model in the open state.
[0014] LABEL DESCRIPTION:
[0015] Body 1, static-end accommodation chamber 11, moving-end accommodation chamber 12
[0016] Static-end component 2, static-end support cylinder 21, static contact seat 22, static arc contact 23, static main contact 24
[0017] Moving-end component 3, moving-end support seat 31, support air hole 311, moving-end support cylinder 32, moving contact seat 33, moving-end nozzle 34, moving-end pressure cylinder 35, moving arc contact 36, contact air hole 361, moving main contact 37, first chamber 301, second chamber 302
[0018] Insulating support cylinder 4
[0019] Moving-end connecting cylinder 5
[0020] Connecting component 6, moving-end current-limiting cover 61, moving-end flow guide cover 62, third chamber 601
[0021] Static-end flow guide cover 7 DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] In order to further explain the technical solution of the present utility model, the present utility model will be elaborated in detail below through specific embodiments.
[0023] As Figure 1As shown in the figure, the present utility model discloses a circuit breaker arc extinguishing chamber structure, which includes a body 1, a static end component 1 and a moving end component 3 arranged in the body 1; the static end component 1 includes a static end support cylinder 21, a static contact seat 22, a static arc contact 23 and a static main contact 24 arranged in the static end support cylinder 21, the static arc contact 23 and the static main contact 24 are fixed to the static contact seat 22 and the static main contact 24 sleeved on the static arc contact 23; the moving end component 3 includes a moving end support base 31, a moving end support cylinder 32, a moving contact seat 33, a moving end nozzle 34, a moving end pressure cylinder 35, a moving arc contact 36 and a moving main contact 37; the moving arc contact 36 and the moving main contact 37 are fixed to the moving contact seat 33 and the moving main contact 37 sleeved on the moving arc contact 36, the moving arc contact 36 and the moving main contact 37 are respectively in movable contact with the static arc contact 23 and the static main contact 24, the moving end nozzle 34 is fixed at the opening of the moving main contact 37 and the moving end nozzle 34 is movably sleeved on the static arc contact 23, the moving end pressure cylinder 35 is movably sleeved with the moving contact seat 33 and the moving arc contact 36 and a first chamber 301 communicating with the moving end nozzle 34 is formed among the moving end pressure cylinder 35, the moving contact seat 33 and the moving arc contact 36, the first chamber 301 is used for accommodating inert gas, the moving end support cylinder 32 sleeved the moving contact seat 33, the moving arc contact 36 and the moving main contact 37 and the moving end support cylinder 32 is connected to the static end support cylinder 21 through an insulating support cylinder 4, the moving end support base 31 is connected to the moving end pressure cylinder 35 and the moving end support cylinder 32 and sleeved the moving arc contact 36, a second chamber 302 communicating with the first chamber 301 is formed among the moving end support base 31, the moving end pressure cylinder 35 and the moving arc contact 36, the moving arc contact 36 is a hollow joint, and a contact air hole 361 and a support air hole 311 communicating with the second chamber 302 are respectively arranged on the side wall of the moving arc contact 36 and the side wall of the moving end support base 31.
[0024] Cooperate Figure 1 As shown in the figure, the key of the present utility model lies in that: the body 1 is provided with a static end accommodating chamber 11 and a moving end accommodating chamber 12, the static end support cylinder 21 is connected to the body 1 and the inner cavity of the static end support cylinder 21 communicates with the static end accommodating chamber 11, the moving end support base 31 is further connected to the body 1 through a moving end connecting cylinder 5, the second chamber 302 communicates with the moving end accommodating chamber 12 through the inner cavity of the moving end connecting cylinder 5, the moving end support base 31 is further connected to the body 1 through a connecting component 6, a third chamber 601 communicating with the moving end accommodating chamber 12 is formed between the connecting component 6 and the moving end support base 31 and the moving end connecting cylinder 5, and the third chamber 601 communicates with the second chamber 302 through the support air hole 311.
[0025] Cooperate Figure 1As shown, when the circuit breaker is tripped, the inert gas in the first chamber 301 will be ejected from the moving end nozzle 34 to blow out the arc generated between the moving arc contact 36 and the static arc contact 23. During the process of extinguishing the arc, a certain amount of arc decomposition products will be generated. Thereafter, a part of the inert gas will drive part of the arc decomposition products to enter the static end accommodation chamber 11 from the inner cavity of the static end support cylinder 21, and the other part of the inert gas will drive the remaining arc decomposition products to enter the moving end accommodation chamber 12 through the first chamber 301, the second chamber 302, the inner cavity of the moving end connection cylinder 5 and the third chamber 601. In this way, the generated arc decomposition products will be contained in the moving end accommodation chamber 12 and the static end accommodation chamber 11, thus avoiding the adverse effects of the arc decomposition products on the moving end components 3 and the static end components 1.
[0026] In an embodiment of the present utility model, the static end support cylinder 21 is connected to the body 1 through a static end flow guide cover 7. The inner cavity of the static end flow guide cover 7 communicates the inner cavity of the static end support cylinder 21 with the static end accommodation chamber 11, and the inner diameter of the static end flow guide cover 7 is gradually expanded along the direction from the static end support cylinder 21 to the static end accommodation chamber 11. Among them, since the inner diameter of the static end flow guide cover 7 is gradually expanded along the direction from the static end support cylinder 21 to the static end accommodation chamber 11, when the inert gas flows into the static end accommodation chamber 11 through the static end flow guide cover 7, the pressure of the inert gas will decrease and the flow rate of the inert gas will increase, so that the diffusion speed of the inert gas in the static end accommodation chamber 11 is accelerated, which is beneficial to quickly cooling the inert gas entering the static end accommodation chamber 11 and quickly restoring the insulating ability of the inert gas.
[0027] In an embodiment of the present utility model, the static end flow guide cover 7 is made of insulating material, so that the static end flow guide cover 7 can electrically isolate the body 1 from the static end components 1 to meet the insulation requirements of the circuit breaker.
[0028] In an embodiment of the present utility model, the connection assembly 6 includes a connected moving end current limiting cover 61 and a moving end flow guide cover 62. The moving end current limiting cover 61 is connected to the moving end support cylinder 32 and is opposite to the support air hole 311. The moving end flow guide cover 62 is connected to the body 1 and the inner diameter of the moving end flow guide cover 62 is gradually expanded along the direction from the third chamber 601 to the moving end accommodation chamber 12. Among them, the moving end current limiting cover 61 is used to limit the inert gas output from the support air hole 311 so that the inert gas output from the support air hole 311 enters the third chamber 601, and the inner diameter of the moving end flow guide cover 62 is gradually expanded along the direction from the third chamber 601 to the moving end accommodation chamber 12, which can make the pressure of the inert gas entering the third chamber 601 decrease and the flow rate of the inert gas increase, so that the diffusion speed of the inert gas in the moving end accommodation chamber 12 is accelerated, which is beneficial to quickly cooling the inert gas entering the moving end accommodation chamber 12 and quickly restoring the insulating ability of the inert gas.
[0029] In an embodiment of the present utility model, the moving-end current-limiting cover 61 is made of metal and is cylindrical in shape; with such a setting, it helps to make the interphase electric field of the circuit breaker relatively uniform to meet the insulation requirements of the circuit breaker.
[0030] In an embodiment of the present utility model, the moving-end current-carrying cover 62 and the moving-end connecting cylinder 5 are made of insulating materials, so that the moving-end current-carrying cover 62 and the moving-end connecting cylinder 5 can electrically isolate the body 1 from the moving-end component 3 to meet the insulation requirements of the circuit breaker.
[0031] The above embodiments and diagrams do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by those of ordinary skill in the relevant technical field shall be regarded as not departing from the patent scope of the present utility model.
Claims
1. A circuit breaker arc extinguishing chamber structure, which includes a body, and a static end component and a moving end component arranged in the body; The static end component includes a static end support cylinder, and a static contact seat, a static arc contact and a static main contact arranged in the static end support cylinder. The static arc contact and the static main contact are fixed to the static contact seat, and the static main contact sleeves the static arc contact; The moving end component includes a moving end support seat, a moving end support cylinder, a moving contact seat, a moving end nozzle, a moving end pressure cylinder, a moving arc contact and a moving main contact; the moving arc contact and the moving main contact are fixed to the moving contact seat, and the moving main contact sleeves the moving arc contact. The moving arc contact and the moving main contact are respectively in movable contact with the static arc contact and the static main contact. The moving end nozzle is fixed at the opening of the moving main contact and the moving end nozzle movably sleeves the static arc contact. The moving end pressure cylinder is movably sleeved with the moving contact seat and the moving arc contact, and a first chamber communicating with the moving end nozzle is formed among the moving end pressure cylinder, the moving contact seat and the moving arc contact. The moving end support cylinder sleeves the moving contact seat, the moving arc contact and the moving main contact, and the moving end support cylinder is connected to the static end support cylinder through an insulating support cylinder. The moving end support seat is connected to the moving end pressure cylinder and the moving end support cylinder and sleeves the moving arc contact. A second chamber communicating with the first chamber is formed among the moving end support seat, the moving end pressure cylinder and the moving arc contact. The moving arc contact is a hollow joint, and a contact air hole and a support air hole communicating with the second chamber are respectively formed on the side wall of the moving arc contact and the side wall of the moving end support seat; The characteristics are as follows: The body is provided with a static end accommodation chamber and a moving end accommodation chamber. The static end support cylinder is connected to the body, and the inner cavity of the static end support cylinder communicates with the static end accommodation chamber. The moving end support seat is connected to the body through a moving end connection cylinder. The second chamber communicates with the moving end accommodation chamber through the inner cavity of the moving end connection cylinder. The moving end support seat is also connected to the body through a connection component. A third chamber communicating with the moving end accommodation chamber is formed between the connection component and the moving end support cylinder and the moving end connection cylinder. The third chamber communicates with the second chamber through the support air hole.
2. The arc extinguishing chamber structure of a circuit breaker according to claim 1, characterized in that: The static end support cylinder is connected to the body through a static end diversion cover. The inner cavity of the static end diversion cover communicates the inner cavity of the static end support cylinder with the static end accommodation chamber. The inner diameter of the static end diversion cover is gradually expanded along the direction from the static end support cylinder to the static end accommodation chamber.
3. The arc extinguishing chamber structure of a circuit breaker according to claim 2, characterized in that: The static end diversion cover is made of insulating material.
4. The arc extinguishing chamber structure of a circuit breaker according to claim 1, characterized in that: The connection component includes a connected moving end current limiting cover and a moving end diversion cover. The moving end current limiting cover is connected to the moving end support cylinder and is opposite to the support air hole. The moving end diversion cover is connected to the body, and the inner diameter of the moving end diversion cover is gradually expanded along the direction from the third chamber to the moving end accommodation chamber.
5. The arc extinguishing chamber structure of a circuit breaker according to claim 4, characterized in that: The moving end current limiting cover is made of metal material and is in a cylindrical shape.
6. The arc extinguishing chamber structure of a circuit breaker according to claim 4, characterized in that: The moving end diversion cover and the moving end connection cylinder are made of insulating material.