Breaker N-pole arc extinguishing system

Abstract

The utility model discloses an N-pole arc extinguishing system of a circuit breaker. The N-pole arc extinguishing system comprises a shell and an arc extinguishing assembly installed in the shell. The arc extinguishing assembly comprises a static contact, a moving contact and an arc extinguishing chamber obliquely arranged in the shell, and the arc extinguishing chamber is located at the N pole; one side of the arc extinguish chamber is connected with the static contact through an arranged arc guide sheet; the other end of the arc extinguish chamber is connected with a wiring end through an arc striking sheet, and a spiral loop is formed between the arc striking sheet and the wiring end. When the moving contact and the static contact are just opened, the arc guide sheet close to the static contact can enhance the excitation magnetic field, so that the arc is quickly transferred to the arc extinguish chamber from the contacts; when the contact is opened to a larger or maximum position, the electric arc is transferred to a position between the arc extinguishing sheet and the arc striking sheet of the arc extinguishing chamber, the arc striking sheet and the wiring terminal form a spiral loop, large electric power is always kept for the electric arc, and the direction of the electric power is always towards the arc extinguishing chamber, so that the electric arc quickly enters the arc extinguishing chamber, and the purpose of extinguishing the electric arc is achieved.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker N-pole arc extinguishing system. Background Technology

[0002] Currently, in the industry, 1P+N and 3P+N circuit breakers can only be opened and closed with the N pole. Due to size limitations, the N pole cannot be equipped with an arc-extinguishing chamber and a corresponding arc-starting plate, resulting in severe contact burning and low performance indicators during electrical life and short-circuit breaking tests. Utility Model Content

[0003] The purpose of this invention is to provide a circuit breaker N-pole arc extinguishing system to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a circuit breaker N-pole arc extinguishing system, comprising a housing and an arc extinguishing assembly installed within the housing; the arc extinguishing assembly includes a stationary contact, a moving contact, and an arc extinguishing chamber obliquely disposed within the housing, wherein the arc extinguishing chamber is located at the N-pole; one side of the arc extinguishing chamber is connected to the stationary contact via an arc guiding plate; the other end of the arc extinguishing chamber is connected to a terminal via an arc ignition plate, and a spiral circuit is formed between the arc ignition plate and the terminal.

[0005] As a preferred technical solution of this utility model: after the arc guide plate is attached to the arc extinguishing chamber, the static arc angle on the arc guide plate extends into the arc extinguishing chamber.

[0006] As a preferred technical solution of this utility model: the static arc angle is arc-shaped and extends into the arc-extinguishing chamber first, and then turns back to connect with the inner side of the static contact.

[0007] As a preferred technical solution of this utility model: after the arc-initiating plate is attached to the arc-extinguishing chamber, it extends into the arc-extinguishing chamber using the provided circumferential portion, and then folds back to connect with the terminal after extension, so as to realize the construction of a spiral circuit.

[0008] As a preferred technical solution of this utility model, the surrounding portion has 0.75 turns.

[0009] As a preferred technical solution of this utility model: the two sides of the arc guide plate and the arc ignition plate are attached to the inner wall surface of the housing, and the arc guide plate and the arc ignition plate are connected to the support seat provided in the housing to fix the arc extinguishing chamber in the housing.

[0010] The beneficial effects of this utility model by adopting the above technical solution are as follows: When the product is tested for electrical life and short circuit breaking, when the moving contact and stationary contact are just opened, the arc guide plate near the stationary contact can enhance the excitation magnetic field, so that the arc can be quickly transferred from the contact to the arc extinguishing chamber; when the contact is opened to a larger or maximum position (opening distance), the arc is transferred to the arc extinguishing plate and the arc ignition plate in the arc extinguishing chamber. The arc ignition plate and the terminal form a spiral circuit, which always maintains a large electrodynamic force on the arc, and the direction of the electrodynamic force is always towards the arc extinguishing chamber, so that the arc can quickly enter the arc extinguishing chamber and achieve the purpose of extinguishing the arc, effectively improving the electrical life and short circuit breaking performance of the product. Attached Figure Description

[0011] Figure 1 This is an exploded view of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram showing the spatial position of the arc-extinguishing component of this utility model when it is located inside the housing;

[0013] Figure 3 This is a schematic diagram showing the spatial relationship of the present invention after the shell is hidden;

[0014] Figure 4 This is a schematic diagram of the structure of the arc-extinguishing chamber of this utility model after being connected with the arc-guiding plate and the arc-initiating plate;

[0015] Figure 5 This is a schematic diagram of the main structure of the arc guide plate of this utility model;

[0016] Figure 6 This is a schematic diagram of the main structure of the arc-inducing plate of this utility model;

[0017] Figure 7 This is a schematic diagram of the internal structure of the shell of this utility model.

[0018] In the figure: 1. Housing; 2. Arc extinguishing assembly; 20. Arc extinguishing chamber; 21. Stationary contact; 22. Terminal; 23. Moving contact; 24. Arc guide plate; 25. Arc ignition plate; 26. Stationary arc angle; 27. Encircling part; 28. Arc extinguishing plate; 3. Support base. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 limiting this utility model.

[0020] Please see Figure 1-7 This utility model provides an embodiment of a circuit breaker N-pole arc extinguishing system, comprising a housing 1 and an arc extinguishing assembly 2 installed within the housing 1; the arc extinguishing assembly 2 includes a stationary contact 21, a moving contact 23, and an arc extinguishing chamber 20 obliquely disposed within the housing 1, wherein the arc extinguishing chamber 20 is located at the N-pole; one side of the arc extinguishing chamber 20 is connected to the stationary contact 21 via an arc guiding plate 24; the other end of the arc extinguishing chamber 20 is connected to a terminal 22 via an arc ignition plate 25, wherein a spiral circuit is formed between the arc ignition plate 25 and the terminal 22.

[0021] Based on this, when the moving contact 23 and the stationary contact 21 are just opened, the arc guide plate 24 near the stationary contact 21 can enhance the excitation magnetic field, so that the arc is quickly transferred from the contact to the arc extinguishing chamber 20. When the contact is opened to a larger or maximum position (opening distance), the arc is transferred to the arc extinguishing plate 28 and the arc ignition plate 25 in the arc extinguishing chamber. The arc ignition plate 25 and the terminal 22 form a spiral circuit, which always maintains a large electrodynamic force on the arc, and the direction of the electrodynamic force is always towards the arc extinguishing chamber 20, so that the arc quickly enters the arc extinguishing chamber 20, achieving the purpose of extinguishing the arc, effectively improving the electrical life and short circuit breaking performance of the product.

[0022] Furthermore, such as Figure 3 , Figure 4 As shown, since the arc guide plate 24 is attached to the arc extinguishing chamber 20, the static arc angle 26 on the arc guide plate 24 extends into the arc extinguishing chamber 20. Therefore, the static arc angle 26 can be used to introduce as much arc as possible into the arc extinguishing chamber 20.

[0023] like Figure 4 , Figure 5As shown, the stationary arc angle 26 extends into the arc-extinguishing chamber 20 in an arc shape, and then turns back to connect with the inner side of the stationary contact 21. Therefore, while introducing as much arc as possible into the arc-extinguishing chamber 20, the movement path of the arc can also be extended, thereby gradually eliminating the energy of the arc.

[0024] like Figure 5 Figure 6 As shown, after the arc-initiating plate 25 is attached to the arc-extinguishing chamber 20, it extends into the arc-extinguishing chamber 20 using the provided circumferential portion 27, and then folds back to connect with the terminal 22 to realize the construction of a spiral circuit. Specifically, the circumferential portion 27 has 0.75 turns. Based on this, the arrangement of the circumferential portion 27 allows the arc to be spiral-shaped. Passing through the circumferential portion 27, the arc-initiating plate 25 always maintains a large electrodynamic force on the arc, causing the arc to move into the arc-extinguishing chamber 20.

[0025] In addition, such as Figure 1 , Figure 2 and Figure 7 As shown, the arc guide plate 24 and the arc ignition plate 25 are attached to the inner wall surface of the housing 1 on both sides, and are connected to the support seat 3 provided in the housing 1 through the arc guide plate 24 and the arc ignition plate 25, so as to fix the arc extinguishing chamber 20 in the housing 1. Therefore, the arc extinguishing chamber 20 can be stably and reliably located on the housing 1.

[0026] In summary, when this device is applied to the N pole of a miniature circuit breaker with 1P+N, 3P+N, or N pole that can only be opened and closed, during electrical life and breaking tests, when the moving contact 23 and the stationary contact 21 are just opened, the cylindrical structure of the stationary arc angle 26 near the stationary contact 21 enhances the excitation magnetic field, causing the arc to quickly transfer from the contact to the stationary arc angle 26. When the contact is opened to a larger or maximum position (opening distance), the arc transfers to the area between the stationary arc angle 26 and the arc-starting plate 25. A 0.75-turn spiral loop can be formed between the circumferential portion 27 on the arc-starting plate 25 and the terminal 22, thus maintaining a large electrodynamic force on the arc, and the direction of the electrodynamic force is always towards the arc-extinguishing chamber 20, allowing the arc to quickly enter the arc-extinguishing chamber 20 and extinguish the arc, effectively improving the electrical life and short-circuit breaking performance of the product.

[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A circuit breaker N-pole arc extinguishing system, characterized in that: It includes a housing (1) and an arc-extinguishing assembly (2) installed inside the housing (1); the arc-extinguishing assembly (2) includes a stationary contact (21) and a moving contact (23) and an arc-extinguishing chamber (20) obliquely placed inside the housing (1), and the arc-extinguishing chamber (20) is located at the N pole; One side of the arc-extinguishing chamber (20) is connected to the stationary contact (21) through an arc-guiding plate (24); the other end of the arc-extinguishing chamber (20) is connected to a terminal (22) through an arc-inducing plate (25), and a spiral circuit is formed between the arc-inducing plate (25) and the terminal (22).

2. The circuit breaker N-pole arc extinguishing system according to claim 1, characterized in that: After the arc guide plate (24) is attached to the arc extinguishing chamber (20), the static arc angle (26) on the arc guide plate (24) extends into the arc extinguishing chamber (20).

3. The circuit breaker N-pole arc extinguishing system according to claim 2, characterized in that: The stationary arc angle (26) extends into the arc-extinguishing chamber (20) in an arc shape, and then turns back to connect with the inner side of the stationary contact (21).

4. The circuit breaker N-pole arc extinguishing system according to claim 1, characterized in that: After the arc-inducing plate (25) is attached to the arc-extinguishing chamber (20), it extends into the arc-extinguishing chamber (20) using the provided circumferential part (27), and after extending, it folds back and connects to the terminal (22) to realize the construction of the spiral circuit.

5. The circuit breaker N-pole arc extinguishing system according to claim 4, characterized in that: The surrounding portion (27) has 0.75 turns.

6. The circuit breaker N-pole arc extinguishing system according to claim 1, characterized in that: The arc guide plate (24) and the arc ignition plate (25) are attached to the inner wall of the housing (1) on both sides, and are connected to the support seat (3) provided in the housing (1) through the arc guide plate (24) and the arc ignition plate (25) to fix the arc extinguishing chamber (20) in the housing (1).

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