Improvements in circuit breakers

Abstract

The utility model relates to circuit breaker technical field discloses a circuit breaker improved structure, including casing and setting up in the contact system and arc chamber of casing, be provided with the partition in casing, the inside space of partition divides into first chamber and second chamber with casing, arc chamber is located in first chamber, contact system is located in second chamber, and the static contact and moving contact of contact system respectively pass through the partition and stretch into first chamber, and the partition is used for arc isolation in first chamber with the arc that moving contact and static contact disconnect produce. The circuit breaker improved structure is separated with the arc that moving contact and static contact disconnect produce and the lower half of circuit breaker through increasing the partition, so as to introduce the arc into arc chamber better with arc extinguishing, guarantees arc extinguishing effect.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an improved circuit breaker structure. Background Technology

[0002] like Figure 1 The diagram shows the structure of an existing circuit breaker, which includes a moving contact 1', a stationary contact 2', and an arc-extinguishing chamber 3' located on one side of the contact position between the moving contact 1' and the stationary contact 2'. An arc-inducing plate 4' extending into the arc-extinguishing chamber 3' is provided at the port of the arc-extinguishing chamber 3', and an arc-extinguishing grid plate 5' is provided inside the arc-extinguishing chamber 3'. When the moving contact 1' and the stationary contact 2' open, the arc (… Figure 1 (As shown by the dashed line) After passing through the arc-starting plate 4', it enters the interior of the arc-extinguishing chamber 3', and is then cooled, stretched, and depressurized by the arc-extinguishing grid plate 5' before being extinguished.

[0003] The circuit breaker structure described above is suitable for breaking low-voltage AC power. AC power has a zero-crossing characteristic, meaning the circuit breaker breaks relatively easily at zero crossings, and the structure is also relatively simple. However, its breaking capacity is weak for high-voltage DC power, and in some cases, it cannot break within the time specified by national standards. Therefore, it is necessary to innovate and optimize the design of the circuit breaker structure. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide an improved circuit breaker structure to enhance arc extinguishing effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An improved circuit breaker structure includes a housing and a contact system and an arc-extinguishing chamber disposed within the housing. A partition plate is provided in the housing, dividing the internal space of the housing into a first cavity and a second cavity. The arc-extinguishing chamber is located in the first cavity, and the contact system is located in the second cavity. The stationary contact and the moving contact of the contact system extend into the first cavity through the partition plate. The partition plate is used to isolate the electric arc generated by the separation of the moving contact and the stationary contact in the first cavity.

[0007] As an alternative, a partition guide groove is provided on the side wall of the housing, the side edge of the partition plate is embedded in the partition guide groove, the partition plate is provided with a through hole for the moving contact to pass through, and the partition plate moves in the partition guide groove as the moving contact moves.

[0008] As an alternative, the separator plate is made of a gas-generating material or has a gas-generating component on it. The separator plate or the gas-generating component can release gas at the high temperature of the electric arc, which helps to blow the electric arc into the arc-extinguishing chamber.

[0009] As an alternative, the closing position of the moving contact and the stationary contact is located at the entrance of the arc-extinguishing chamber, and an arc-inducing plate is provided on one side of the moving contact. The arc-inducing plate is used to introduce the electric arc on the moving contact into the arc-extinguishing chamber when the circuit is broken.

[0010] As an alternative, the end of the stationary contact is configured as an arc-inducing slope, which is used to introduce the electric arc on the stationary contact into the arc-extinguishing chamber during disconnection.

[0011] As an alternative, the arc-extinguishing chamber is equipped with several arc-extinguishing grids arranged at intervals, and the top of the arc-extinguishing chamber is equipped with flame-extinguishing plates.

[0012] The beneficial effects of this utility model are:

[0013] The improved circuit breaker structure separates the arc generated by the separation of the moving and stationary contacts from the lower half of the circuit breaker by adding a partition plate, so that the arc can be better introduced into the arc extinguishing chamber to extinguish the arc and ensure the arc extinguishing effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an existing circuit breaker structure;

[0015] Figure 2 This is a schematic diagram of the closing operation of the improved circuit breaker structure provided in this embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the opening of the improved circuit breaker structure provided in this embodiment of the utility model;

[0017] Figure 4 This is a schematic diagram of the installation of the partition plate in the improved circuit breaker structure provided in this embodiment of the utility model.

[0018] In the attached image:

[0019] 1' Moving contact; 2' Stationary contact; 3' Arc-extinguishing chamber; 4' Arc-starting plate; 5' Arc-extinguishing grid plate;

[0020] 1. Shell; 2. Contact system; 3. Arc extinguishing chamber; 4. Divider plate; 5. First cavity; 6. Second cavity; 7. Moving contact; 8. Stationary contact; 9. Divider guide groove; 10. Perforation; 11. Arc ignition plate; 12. Arc ignition inclined surface; 13. Arc extinguishing grid plate; 14. Flame extinguishing plate. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0026] Please see Figures 2 to 4 This embodiment provides an improved circuit breaker structure, including a housing 1 and a contact system 2 and an arc-extinguishing chamber 3 disposed within the housing 1. A partition plate 4 is disposed in the housing 1, which divides the internal space of the housing 1 into a first cavity 5 and a second cavity 6. The arc-extinguishing chamber 3 is located in the first cavity 5, and the contact system 2 is located in the second cavity 6. The stationary contact 8 and the moving contact 7 of the contact system 2 extend into the first cavity 5 through the partition plate 4, respectively. The partition plate 4 is used to isolate the arc generated by the separation of the moving contact 7 and the stationary contact 8 in the first cavity 5.

[0027] Therefore, by adding a partition plate 4 to separate the arc generated by the moving contact 7 and the stationary contact 8 from the lower half of the circuit breaker, the arc can be better introduced into the arc extinguishing chamber 3 to extinguish the arc, thus ensuring the arc extinguishing effect.

[0028] In some embodiments, a partition guide groove 9 is provided on the side wall of the housing 1, and the side edge of the partition plate 4 is embedded in the partition guide groove 9, as detailed in [reference needed]. Figure 4 The partition plate 4 has a through hole 10 for the moving contact 7 to pass through, and the partition plate 4 moves in the partition guide groove 9 as the moving contact 7 moves.

[0029] By designing the partition plate 4 to be movable, the size of the perforation 10 can be reduced, ensuring the partition plate 4's isolation function and completely confining the entire arc range within the first cavity 5 above the partition plate 4, thereby improving the arc isolation effect.

[0030] In some embodiments, the partition plate 4 is made of a gas-generating material or has a gas-generating component. When the partition plate 4 is made of a gas-generating material, the partition plate 4 can release gas that helps to blow the arc into the arc-extinguishing chamber 3 at the high temperature of the electric arc. When the partition plate 4 is provided with a gas-generating component, the gas-generating component can release gas that helps to blow the arc into the arc-extinguishing chamber 3 at the high temperature of the electric arc.

[0031] The gas-generating material can be POM, JPO, DMC, epoxy laminate, nylon, etc., which can release gas at the high temperature of the electric arc, increase the gas pressure of the arc-extinguishing chamber 3, and blow the electric arc into the arc-extinguishing chamber 3 to achieve a better arc-extinguishing effect.

[0032] In some embodiments, the closing position of the moving contact 7 and the stationary contact 8 is located at the entrance of the arc-extinguishing chamber 3, and an arc-inducing plate 11 is provided on one side of the moving contact 7. The arc-inducing plate 11 is used to introduce the electric arc on the moving contact 7 into the arc-extinguishing chamber 3 when the circuit is broken. Further, the end of the stationary contact 8 is provided as an arc-inducing inclined surface 12, which is used to introduce the electric arc on the stationary contact 8 into the arc-extinguishing chamber 3 when the circuit is broken.

[0033] This ensures that the electric arc generated when the moving contact 7 and the stationary contact 8 are disconnected can be better and faster introduced into the arc-extinguishing chamber 3 to be extinguished.

[0034] Specifically, the arc-extinguishing chamber 3 is provided with a number of arc-extinguishing grid plates 13 arranged at intervals, and the top of the arc-extinguishing chamber 3 is provided with flame-extinguishing plates 14.

[0035] Thus, the arc generated when the moving contact 7 and the stationary contact 8 break is effectively cut off and extinguished, the arc is extinguished quickly and the arc reignition is prevented, metal particles and impurities are effectively blocked from flying out, and the airflow is ensured to guarantee the arc extinguishing performance of the arc extinguishing chamber 3, thereby achieving zero arc flash.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An improved circuit breaker structure, comprising a housing (1) and a contact system (2) and an arc-extinguishing chamber (3) disposed within the housing (1), characterized in that, The housing (1) is provided with a partition plate (4), which divides the internal space of the housing (1) into a first cavity (5) and a second cavity (6). The arc-extinguishing chamber (3) is located in the first cavity (5), and the contact system (2) is located in the second cavity (6). The stationary contact (8) and the moving contact (7) of the contact system (2) extend into the first cavity (5) through the partition plate (4). The partition plate (4) is used to isolate the arc generated by the separation of the moving contact (7) and the stationary contact (8) in the first cavity (5).

2. The improved circuit breaker structure according to claim 1, characterized in that, The side wall of the housing (1) is provided with a partition guide groove (9), the side edge of the partition plate (4) is embedded in the partition guide groove (9), the partition plate (4) is provided with a through hole (10) for the moving contact (7) to pass through, and the partition plate (4) moves in the partition guide groove (9) as the moving contact (7) moves.

3. The improved circuit breaker structure according to claim 1, characterized in that, The partition plate (4) is made of a gas-generating material or has a gas-generating component. The partition plate (4) or the gas-generating component can release gas at the high temperature of the electric arc, which helps to blow the electric arc into the arc-extinguishing chamber (3).

4. The improved circuit breaker structure according to claim 1, characterized in that, The closing position of the moving contact (7) and the stationary contact (8) is located at the entrance of the arc-extinguishing chamber (3), and an arc-inducing plate (11) is provided on one side of the moving contact (7). The arc-inducing plate (11) is used to introduce the electric arc on the moving contact (7) into the arc-extinguishing chamber (3) when the circuit is broken.

5. The improved circuit breaker structure according to claim 4, characterized in that, The end of the stationary contact (8) is configured as an arc-inducing inclined surface (12), which is used to introduce the electric arc on the stationary contact (8) into the arc-extinguishing chamber (3) when the circuit is broken.

6. The improved circuit breaker structure according to claim 1, characterized in that, The arc-extinguishing chamber (3) is provided with a number of arc-extinguishing grid plates (13) arranged at intervals, and the top of the arc-extinguishing chamber (3) is provided with flame-extinguishing plates (14).

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