N-pole arc extinguishing structure for circuit breaker

Abstract

The utility model discloses an N-pole arc extinguishing structure for a circuit breaker. The N-pole arc extinguishing structure comprises a substrate, a handle, a movable contact structure and a static contact structure, a substrate arc extinguish chamber; the static contact structure comprises an N-pole arc extinguishing cover, an N-pole arc striking sheet and an N-pole static contact plate; an N-pole wiring board is connected in front of the N-pole arc striking sheet; a silver point is arranged on the N-pole static contact plate; the N-pole arc striking sheet is of a bent structure and comprises a connecting part, a bent part and an extending part; the connecting part is connected with the N-pole arc extinguishing cover, the bending part corresponds to the N-pole static contact plate, and the extending part is connected with the N-pole wiring plate; according to the utility model, through the arrangement of the N-pole arc striking sheet and the forward bending design, the arc striking distance is increased and the guidance is optimized, so that the arc can smoothly and efficiently enter the arc extinguish chamber; and the distance between the N-pole arc striking sheet and the N-pole static contact plate is slightly smaller than the opening distance between the moving contact and the N-pole static contact plate, so that when the breaking operation is carried out, the arc can be guided to the arc extinguishing chamber without completely opening the contact, and the arc extinguishing efficiency is high. The arc extinguishing device has the advantage of relatively high arc extinguishing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and in particular to an arc-extinguishing structure for the N-pole of a circuit breaker. Background Technology

[0002] In a single-phase circuit, the neutral current is equal in magnitude and opposite in direction to the phase current. When a short circuit or overload occurs, the protective electrode (P-terminal) will quickly disconnect the circuit to prevent the fault from escalating.

[0003] However, existing circuit breakers only disconnect the P pole quickly, while the N pole does not, which poses a potential safety hazard and could easily lead to accidents due to the N pole not disconnecting; moreover, existing circuit breakers generally have limited arc-extinguishing capabilities and are prone to problems when disconnecting. Utility Model Content

[0004] The purpose of this invention is to provide an arc-extinguishing structure for the N-pole of a circuit breaker.

[0005] This invention has the advantage of relatively higher arc extinguishing efficiency.

[0006] The technical solution of this utility model is as follows: An N-pole arc-extinguishing structure for a circuit breaker, comprising a base plate, a handle disposed within the base plate, a moving contact structure disposed within the base plate and linked to the handle, and a stationary contact structure disposed within the base plate corresponding to the moving contact structure; the base plate is provided with an arc-extinguishing chamber corresponding to the stationary contact structure; the stationary contact structure includes an N-pole arc-extinguishing cover, an N-pole arc-inducing plate disposed at the front end of the N-pole arc-extinguishing cover, and an N-pole stationary contact plate disposed at the rear end of the N-pole arc-extinguishing cover; the front end of the N-pole arc-inducing plate is connected to an N-pole terminal block; the N-pole stationary contact plate is provided with silver dots; the N-pole arc-inducing plate has a curved structure, including a connecting part, a bending part, and an extension part; the connecting part is connected to the N-pole arc-extinguishing cover, the bending part corresponds to the N-pole stationary contact plate, and the extension part is connected to the N-pole terminal block; the distance between the bending part and the N-pole stationary contact plate is less than the opening distance between the moving contact structure and the stationary contact structure.

[0007] In the aforementioned N-pole arc extinguishing structure for a circuit breaker, the handle is connected to the moving contact structure via a U-bolt.

[0008] In the aforementioned N-pole arc extinguishing structure for a circuit breaker, the moving contact structure includes a contact seat, a trip latch rotatably sleeved on the contact seat, and a moving contact rotatably sleeved on the contact seat.

[0009] In the aforementioned N-pole arc extinguishing structure for circuit breakers, the trip latch is rotatably connected to the contact seat via a thick shaft, and a flying wire spring that is linked to the contact seat is sleeved on the trip latch.

[0010] In the aforementioned N-pole arc extinguishing structure for circuit breakers, the moving contact is connected to the trip latch via a contact spring.

[0011] Compared with the prior art, this utility model sets up an N-pole arc igniter, which has a curved structure including a connecting part, a bending part and an extension part. Through the forward bending design, the arc ignition distance is effectively increased and the arc guidance is optimized, ensuring that the arc can enter the arc extinguishing chamber smoothly and efficiently.

[0012] The N-pole arc-starting plate adopts a curved structure, forming the shortest distance between it and the N-pole stationary contact plate. This distance is slightly smaller than the opening distance between the moving contact and the N-pole stationary contact plate. This structural design helps to guide the arc into the arc-extinguishing chamber in advance when the N-pole is performing a breaking operation, before the contact is fully opened, thereby enhancing the arc-extinguishing efficiency of the N-pole.

[0013] Therefore, this invention has the advantage of relatively higher arc extinguishing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of the structure of this utility model;

[0016] Figure 3 This is an assembly diagram of the present invention.

[0017] The markings in the attached diagram are: 1-handle, 2-U-bolt, 3-contact seat, 4-thick shaft, 5-jump buckle, 6-flying wire spring, 7-contact spring, 8-moving contact, 9-N pole stationary contact plate, 10-silver dot, 11-N pole arc extinguishing cover, 12-N pole arc ignition plate, 13-N pole terminal block. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] Example. An N-pole arc-extinguishing structure for a circuit breaker, such as... Figure 1-3 As shown, the device includes a substrate, a handle 1 disposed within the substrate, a moving contact structure disposed within the substrate and linked to the handle 1, and a stationary contact structure disposed within the substrate corresponding to the moving contact structure. The substrate has an arc-extinguishing chamber corresponding to the stationary contact structure. The stationary contact structure includes an N-pole arc-extinguishing cover 11, an N-pole arc-inducing plate 12 disposed at the front end of the N-pole arc-extinguishing cover 11, and an N-pole stationary contact plate 9 disposed at the rear end of the N-pole arc-extinguishing cover 11. An N-pole terminal block 13 is connected to the front end of the N-pole arc-inducing plate 12. A silver dot 10 is provided on the N-pole stationary contact plate 9. The N-pole arc-inducing plate 12 has a curved structure, including a connecting part, a bending part, and an extension part. The connecting part is connected to the N-pole arc-extinguishing cover 11, the bending part corresponds to the N-pole stationary contact plate 9, and the extension part is connected to the N-pole terminal block 13. The distance between the bending part and the N-pole stationary contact plate 9 is less than the opening distance between the moving contact structure and the stationary contact structure.

[0020] The handle 1 is connected to the moving contact structure via a U-shaped bolt 2.

[0021] The moving contact structure includes a contact seat 3, a snap fastener 5 rotatably sleeved on the contact seat 3, and a moving contact 8 rotatably sleeved on the contact seat 3.

[0022] The jump buckle 5 is rotatably connected to the contact seat 3 via the thick shaft 4, and a flying wire spring 6 that is linked with the contact seat 3 is sleeved on the jump buckle 5.

[0023] The moving contact 8 is connected to the jumper 5 via the contact spring 7.

Claims

1. A neutral arc-extinguishing structure for a circuit breaker, characterized in that: The system includes a substrate, a handle (1) disposed within the substrate, a moving contact structure disposed within the substrate and linked to the handle (1), and a stationary contact structure disposed within the substrate corresponding to the moving contact structure; the substrate is provided with an arc-extinguishing chamber corresponding to the stationary contact structure; the stationary contact structure includes an N-pole arc-extinguishing cover (11), an N-pole arc-inducing plate (12) disposed at the front end of the N-pole arc-extinguishing cover (11), and an N-pole stationary contact plate (9) disposed at the rear end of the N-pole arc-extinguishing cover (11); the front end of the N-pole arc-inducing plate (12) is connected to an N-pole terminal block (13); the N-pole stationary contact plate (9) is provided with silver dots (10); the N-pole arc-inducing plate (12) has a curved structure, including a connecting part, a bending part, and an extension part; the connecting part is connected to the N-pole arc-extinguishing cover (11), the bending part corresponds to the N-pole stationary contact plate (9), and the extension part is connected to the N-pole terminal block (13); the distance between the bending part and the N-pole stationary contact plate (9) is less than the opening distance between the moving contact structure and the stationary contact structure.

2. The N-pole arc-extinguishing structure for a circuit breaker according to claim 1, characterized in that: The handle (1) is connected to the moving contact structure via a U-bolt (2).

3. The N-pole arc-extinguishing structure for a circuit breaker according to claim 1, characterized in that: The moving contact structure includes a contact seat (3), a snap fastener (5) rotatably sleeved on the contact seat (3), and a moving contact (8) rotatably sleeved on the contact seat (3).

4. The arc-extinguishing structure for the N-pole of a circuit breaker according to claim 3, characterized in that: The jumper (5) is rotatably connected to the contact seat (3) via a thick shaft (4), and a flying wire spring (6) that is linked with the contact seat (3) is sleeved on the jumper (5).

5. The arc-extinguishing structure for the N-pole of a circuit breaker according to claim 3, characterized in that: The moving contact (8) is connected to the jumper (5) via the contact spring (7).

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