Circuit breaker arc extinguishing system
By employing a combination structure of stationary contact baffles and multiple moving contact baffles in the circuit breaker, the arc shock wave is reflected and the space behind the arc is sealed, solving the problem of slow arc movement speed, improving the breaking capacity of the circuit breaker and reducing contact erosion.
Patent Information
- Application Number
- CN202423311523.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing technologies, the contact materials of circuit breakers are prone to ablation, resulting in slow arc movement and inability to effectively interrupt fault current.
The system employs a combination of stationary contact baffles and multiple moving contact baffles to reflect the shock wave generated by the electric arc and seal the space behind the arc, thereby propelling the arc rapidly into the arc-extinguishing chamber.
It increases the arc speed, improves the circuit breaker's breaking capacity, reduces contact material erosion, and has a simple structure and low cost.
Smart Images
Figure CN223911621U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to low-voltage electric appliance technical field relates to a kind of low-voltage arc extinguishing technology, specifically a kind of circuit breaker arc extinguishing system. BACKGROUND
[0002] Low-voltage circuit breaker is important protection equipment, for breaking fault current in low-voltage circuit. When low-voltage circuit breaker breaks fault current, arc will be generated between moving contact and static contact, and arc is a kind of high-temperature gas that can conduct electricity. Circuit breaker drives arc into arc extinguishing chamber quickly to extinguish arc and complete the breaking of fault current. Therefore, how to speed up the movement of arc is the key to the design of circuit breaker, and it is very important for the improvement of breaking capacity of circuit breaker and the protection of moving contact and static contact. When the moving contact and static contact of circuit breaker are separated, due to the rapid change of gas state in arc area and the high temperature of arc, an impact wave will be released to the surrounding at the moment of arc generation, which will ablate the contact material and cause slow movement of arc. SUMMARY
[0003] The utility model discloses a kind of circuit breaker arc extinguishing systems to solve the technical problem that contact material is easy to ablate in prior art, resulting in slow movement of arc.
[0004] To achieve the above object, the utility model adopts the following technical scheme:
[0005] A kind of circuit breaker arc extinguishing system, including support, one end of support is connected with movement mechanism, the other end is connected with dynamic electric pole, dynamic electric pole lower end is provided with moving contact, moving contact and movement mechanism between being provided with moving contact baffle, dynamic electric pole is set through moving contact baffle;Dynamic electric pole side is provided with arc extinguishing chamber, arc extinguishing chamber upper end is fixedly connected with static electric pole, static electric pole is provided with static contact and static contact baffle, static contact baffle and moving contact baffle are stacked, arc extinguishing chamber lower end is fixedly connected with dynamic arc horn, dynamic arc horn is provided with permanent magnet.
[0006] Preferably, the moving contact baffle includes an opening portion, a dynamic reflection portion, and a limiting portion; the dynamic reflection portion and the limiting portion are located on both sides of the opening portion; the dynamic reflection portion is located on the side of the dynamic electric pole close to the static contact, and is stacked with the static contact baffle, and the dynamic electric pole is arranged through the opening portion.
[0007] Preferably, the moving contact baffle is formed by one or a plurality of pieces stacked together.
[0008] When the moving contact baffle is formed by a plurality of pieces stacked together, the widths of the limiting portions of the plurality of moving contact baffles are equal, and the sizes of the opening portions are not equal.
[0009] Preferably, the width of the opening portion of the moving contact baffle is greater than the width of the dynamic electric pole.
[0010] Preferably, the material of the moving contact baffle is a high-temperature-resistant insulating material, a gas-producing material or a non-gas-producing material.
[0011] Preferably, the static contact baffle has a mounting portion fixedly mounted on the static conductive rod and a static reflection portion arranged in stack with the moving contact baffle.
[0012] Preferably, the static reflection portion is located between the static contact and the moving contact and on the side of the moving contact close to the moving mechanism in the opening / closing movement trajectory of the moving contact.
[0013] Preferably, the static contact baffle has a static reflection portion and the moving contact baffle has a moving reflection portion, and the static contact baffle and the moving contact baffle are arranged in stack, the static reflection portion and the moving reflection portion complement each other when the moving contact is at the opening position, the static reflection portion covers the moving reflection portion and is located between the static contact and the moving contact.
[0014] Preferably, the material of the static contact baffle is a high-temperature-resistant insulating material, a gas-producing material or a non-gas-producing material.
[0015] Preferably, the arc-extinguishing chamber has a plurality of metal grid plates spaced from each other.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] When the moving and static contacts of the circuit breaker are separated, due to the rapid change of the gas state in the arc area and the high temperature and heat of the arc, an impact wave is released to the surroundings at the moment of the generation of the arc. The utility model sets the static contact baffle and the moving contact baffle between the moving and static contacts, which reflects the impact wave released to the rear of the moving and static contacts back, pushes the arc to move forward quickly and leave the contact area. On the other hand, the technical scheme adopts the cooperation of the static contact baffle and the moving contact baffle, which can complement each other and better cover the area between the static contact and the moving contact, closes the rear space of the arc, makes the arc move to the forward arc-extinguishing chamber area under the action of the pressure gradient, promotes the arc to enter the arc-extinguishing chamber and improves the breaking capacity.
[0018] Therefore, the technical scheme provided by the utility model adopts the combination of the static contact baffle and the plurality of moving contact baffles, which is helpful to reflect the impact wave generated at the moment of the generation of the arc, push the arc to move from the contact area quickly, and at the same time, the reflection areas of the static contact baffle and the moving contact baffle complement each other, close the rear space of the arc, promote the arc to enter the arc-extinguishing chamber and improve the breaking capacity. The scheme has simple structure and low cost and can effectively solve the problems of slow arc movement speed and serious ablation of the contact material. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the premise of the drawings.
[0020] Figure 1 It is a closing state structure schematic view of the present application;
[0021] Figure 2 It is a closing state structure schematic view of the present application;
[0022] Figure 3 It is a moving contact baffle structure schematic view of the present application;
[0023] Figure 4 It is a static contact baffle structure schematic view of the present application.
[0024] Among them: 1 - static conductive rod;2 - static contact;3 - dynamic conductive rod;4 - dynamic contact;5 - support;6 - movement mechanism;7 - arc extinguishing chamber;8 - dynamic contact baffle;81 - opening part;82 - reflection part;83 - limiting part;9 - static contact baffle;91 - mounting part;92 - reflection part;10 - magnetic conducting plate;11 - arc separation wall;12 - dynamic arc angle;13 - permanent magnet. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, and obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.
[0027] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0030] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] The present invention will now be described in further detail with reference to the accompanying drawings:
[0032] See Figure 1 , Figure 2 An arc-extinguishing system for a circuit breaker includes a support 5. A moving mechanism 6 is connected to one end of the support 5, and a moving conductive rod 3 is connected to the other end. A moving contact 4 is located at the lower end of the moving conductive rod 3. A moving contact baffle 8 is positioned between the moving contact 4 and the moving mechanism 6, and the moving conductive rod 3 passes through the moving contact baffle 8. An arc-extinguishing chamber 7 is located on one side of the moving conductive rod 3. A stationary conductive rod 1 is fixedly connected to the upper end of the arc-extinguishing chamber 7. A stationary contact 2 and a stationary contact baffle 9 are mounted on the stationary conductive rod 1. The stationary contact baffle 9 and the moving contact baffle 8 are stacked. A moving arc angle 12 is fixedly connected to the lower end of the arc-extinguishing chamber 7, and a permanent magnet 13 is mounted on the moving arc angle 12. This technical solution uses a combination of a stationary contact baffle and multiple moving contact baffles to reflect the instantaneous shock wave generated by the electric arc and seal the space behind the arc, pushing the arc to quickly transfer from the contact area, promoting the arc to enter the arc-extinguishing chamber, and improving the breaking capacity.
[0033] In some embodiments, see Figure 3The moving contact baffle 8 comprises an opening part 81, a moving reflection part 82 and a limiting part 83; the moving reflection part 82 and the limiting part 83 are located on both sides of the opening part 81; the moving reflection part 82 is located on the side of the moving conducting rod 3 close to the static contact 2, and is arranged in a superposed manner with the static contact baffle 9, and the moving conducting rod 3 is arranged through the opening part 81.
[0034] When the moving and static contacts of the circuit breaker are separated, due to the rapid change of the gas state in the arc area and the high temperature and high heat of the arc, an impact wave is released to the surrounding at the moment of the arc generation. The utility model sets the reflection part of the combined baffle between the moving and static contacts, which reflects the impact wave released by the arc to the rear of the moving and static contacts back, pushes the arc to move forward quickly and leave the contact area. On the other hand, the static contact baffle and the moving contact baffle are matched in the technical scheme, which can complement each other and better cover the area between the static contact and the moving contact, so as to close the rear space of the arc, make the arc move to the forward arc extinguishing chamber area under the action of the pressure gradient, promote the arc to enter the arc extinguishing chamber and improve the breaking capacity.
[0035] Therefore, the technical scheme provided by the utility model adopts the combination of the static contact baffle and the multiple moving contact baffles, which is helpful to reflect the impact wave generated at the moment of the arc generation and push the arc to transfer from the contact area quickly. Meanwhile, the reflection areas of the static contact baffle and the moving contact baffle complement each other, close the rear space of the arc, promote the arc to enter the arc extinguishing chamber and improve the breaking capacity. The scheme has simple structure and low cost, and can effectively solve the problems of slow arc movement speed and serious ablation of contact materials.
[0036] In some embodiments, the moving contact baffle 8 is provided in one piece or a plurality of pieces stacked together.
[0037] When the moving contact baffle 8 is provided in a plurality of pieces stacked together, the widths of the limiting parts 83 of the plurality of moving contact baffles 8 are equal, and the sizes of the opening parts 81 are not equal.
[0038] In some embodiments, the width of the opening part 81 of the moving contact baffle 8 is greater than the width of the moving conducting rod 3.
[0039] In some embodiments, the material of the moving contact baffle 8 is a high-temperature-resistant insulating material, a gas-producing material or a non-gas-producing material.
[0040] In some embodiments, referring to Figure 4 The static contact baffle 9 has a mounting part 91 and a static reflection part 92, the mounting part 91 is fixedly mounted on the static conducting rod 1, and the static reflection part 92 is arranged in a superposed manner with the moving contact baffle 8.
[0041] In some embodiments, the static reflection part 92 is located between the static contact 2 and the moving contact 4, and is located on the side of the moving contact 4 close to the moving mechanism 6.
[0042] In some embodiments, the static contact baffle 9 has a static reflection part 92; the dynamic contact baffle 8 has a dynamic reflection part 82; the static contact baffle 9 and the dynamic contact baffle 8 are arranged in superposition, when the dynamic contact 4 is in the open position, the static reflection part 92 and the dynamic reflection part 82 complement each other, the static reflection part 92 covers the dynamic reflection part 82, between the static contact 2 and the dynamic contact 4.
[0043] In some embodiments, the material of the static contact baffle 9 is a high-temperature-resistant insulating material, a gas-producing material or a non-gas-producing material.
[0044] In some embodiments, the arc-extinguishing chamber 7 has a plurality of metal grid plates 71 spaced from each other.
[0045] In some embodiments, a circuit breaker arc-extinguishing system, comprising: a static contact 2 fixed on a static conducting rod 1, a dynamic contact 4 fixed on a dynamic conducting rod 3, a bracket 5 for installing the dynamic conducting rod 3, a movement mechanism 6 for moving the bracket 5, an arc-extinguishing chamber 7, and a dynamic contact baffle 8, a magnetic conducting plate 10, an arc separation wall 11, a dynamic arc horn 12 and a permanent magnet 13 sleeved on the dynamic conducting rod 3;
[0046] The movement mechanism 6 moves to drive the bracket 5 to move, the bracket 5 moves to drive the dynamic conducting rod 3 to move, realizing the opening and closing actions of the dynamic contact 4 and the static contact 2;
[0047] The dynamic contact baffle 8 is provided with an opening part 81, and the dynamic conducting rod 3 passes through the opening part 81;
[0048] The dynamic contact baffle 8 is arranged between the dynamic contact 4 and the movement mechanism 6;
[0049] The arc-extinguishing chamber 7 has a plurality of metal grid plates 71 spaced from each other.
[0050] In some embodiments, the dynamic contact baffle 8 is a flat plate or an arc-shaped structure, having a dynamic reflection part 82, an opening part 81 and a limiting part 83, wherein the dynamic reflection part 82 is located on the side of the dynamic conducting rod 3 close to the static contact 2, and the limiting part 83 is located on the side of the dynamic conducting rod 3 away from the static contact 2.
[0051] In summary, the application provides a circuit breaker contact and arc extinguishing system, comprising: a static contact fixed on a static conducting rod, a dynamic contact fixed on a dynamic conducting rod, a bracket for installing the dynamic conducting rod, a mechanism for moving the bracket, an arc chamber, a dynamic contact baffle sleeved on the dynamic conducting rod, and a static contact baffle fixedly installed on the static conducting rod, the static contact baffle and the dynamic contact baffle are arranged in a superposed manner, when the dynamic contact is in an open position, the reflection part of the static contact baffle and the reflection part of the dynamic contact baffle complement each other and cover between the static contact and the dynamic contact. The technical scheme adopts the combination of the static contact baffle and the multiple dynamic contact baffles, reflects the arc to generate an instantaneous shock wave, closes the space behind the arc, pushes the arc to quickly transfer from the contact area, promotes the arc to enter the arc chamber, and improves the breaking capacity
[0052] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An arc chute system for a circuit breaker, comprising: The support (5) is connected with a moving mechanism (6) at one end and a moving contact rod (3) at the other end, the lower end of the moving contact rod (3) is provided with a moving contact (4), the moving contact (4) is provided between the moving mechanism (6) and a moving contact baffle (8), and the moving contact rod (3) passes through the moving contact baffle (8); the moving contact rod (3) is provided with an arc-extinguishing chamber (7) at one side, the upper end of the arc-extinguishing chamber (7) is fixedly connected with a static contact rod (1), the static contact rod (1) is provided with a static contact (2) and a static contact baffle (9), the static contact baffle (9) is arranged in a superposed manner with the moving contact baffle (8), and the lower end of the arc-extinguishing chamber (7) is fixedly connected with a moving arc horn (12), and the moving arc horn (12) is provided with a permanent magnet (13).
2. The circuit breaker arc quenching system of claim 1, wherein, The moving contact baffle (8) comprises an opening part (81), a moving reflection part (82) and a limiting part (83); the moving reflection part (82) and the limiting part (83) are located on both sides of the opening part (81); and the moving reflection part (82) is located on the side of the moving contact rod (3) close to the static contact (2) and is arranged in a superposed manner with the static contact baffle (9), and the moving contact rod (3) passes through the opening part (81).
3. The circuit breaker arc quenching system of claim 2, wherein, The moving contact baffle (8) is arranged in one piece or a plurality of pieces in a superposed manner. When the moving contact baffle (8) is arranged in a plurality of pieces in a superposed manner, the widths of the limiting parts (83) of the plurality of moving contact baffles (8) are equal, and the sizes of the opening parts (81) are not equal.
4. The circuit breaker arc quenching system of claim 3, wherein, The width of the opening part (81) of the moving contact baffle (8) is greater than the width of the moving contact rod (3).
5. The circuit breaker arc quenching system of claim 1, wherein, The material of the moving contact baffle (8) is a high-temperature-resistant insulating material, a gas-producing material or a non-gas-producing material.
6. The circuit breaker arc quenching system of claim 1, wherein, The static contact baffle (9) has a mounting part (91) and a static reflection part (92), the mounting part (91) is fixedly mounted on the static contact rod (1), and the static reflection part (92) is arranged in a superposed manner with the moving contact baffle (8).
7. An arc chute system for a circuit breaker according to claim 6 wherein, The static reflection part (92) is located between the static contact (2) and the moving contact (4) and on the side of the moving contact (4) close to the moving mechanism (6) in the opening and closing movement track.
8. The circuit breaker arc quenching system of claim 1, wherein, The static contact baffle (9) has a static reflection part (92), the moving contact baffle (8) has a moving reflection part (82), the static contact baffle (9) and the moving contact baffle (8) are arranged in a superposed manner, the static reflection part (92) and the moving reflection part (82) complement each other when the moving contact (4) is located at the opening position, the static reflection part (92) covers the moving reflection part (82) and is located between the static contact (2) and the moving contact (4).
9. The circuit breaker arc quenching system of claim 1, wherein, The material of the static contact baffle (9) is a high-temperature-resistant insulating material, a gas-producing material or a non-gas-producing material.
10. The circuit breaker arc quenching system of claim 1, wherein, The arc-extinguishing chamber (7) has a plurality of metal grid pieces (71) spaced from each other.