CN-224217458-U - Arc cutting structure of circuit breaker

Abstract

Arc cutting structure of circuit breaker. The arc cutting structure mainly solves the problem that an arc cutting structure of the current breaker is arranged on an arc separation sheet and possibly fails. The movable contact is characterized by further comprising a convex rib (5) which is arranged on the inner wall of the shell, and at least the convex rib is arranged between the movable contact and the fixed contact when the switch is opened. The utility model provides an arc cutting structure of a circuit breaker, wherein the cutting structure is arranged on the inner wall of a shell, and an arc barrier only keeps the effect of gas production and prevents failure.

Inventors

• REN CHANGBIN
• JIN GUI
• YANG FAN
• ZHAO MING
• WANG LINGFENG

Assignees

• 浙江天正电气股份有限公司

Dates

Publication Date

20260508

Application Date

20250528

Claims (9)

1. 1. The arc cutting structure of the circuit breaker comprises a shell (1), wherein a moving contact (3), a fixed contact (4) and at least two arc baffles (2) are arranged in the shell, and an exhaust channel (21) is formed between the two arc baffles, and is characterized by further comprising And the convex rib (5) is arranged on the inner wall of the shell, and at least the convex rib is arranged between the moving contact and the fixed contact during opening.
2. 2. The arc cutting structure of the circuit breaker according to claim 1, wherein the bead is integrally formed with the housing.
3. 3. The arc cutting structure of the circuit breaker according to claim 1, wherein the arc shield surface is a smooth plane.
4. 4. The arc cutting structure of a circuit breaker according to claim 1, wherein the ribs comprise first ribs (51) extending transversely, and the first ribs are correspondingly arranged above the fixed contact.
5. 5. The arc cutting structure of the circuit breaker according to claim 4, wherein the bead comprises a second bead (52) extending longitudinally, the second bead being provided between the moving contact and the stationary contact when the switch is opened.
6. 6. The arc cutting structure of the circuit breaker according to claim 5, wherein one end of the second bead is connected to the first bead.
7. 7. The arc cutting structure of the circuit breaker according to claim 6, wherein one end of the second bead faces the exhaust passage.
8. 8. The arc cutting structure of a circuit breaker according to any one of claims 1 to 7, wherein a sinking groove (11) is formed in the inner wall of the housing, and the arc shield is arranged in the sinking groove.
9. 9. The arc cutting structure of the circuit breaker according to claim 8, wherein a boss (111) is arranged in the sinking groove, and a mounting hole (25) matched with the boss is arranged on the arc barrier.

Description

Arc cutting structure of circuit breaker Technical Field The utility model relates to the field of circuit breakers, in particular to an arc cutting structure of a circuit breaker. Background As shown in chinese patent CN211320039U, the existing miniature circuit breaker makes a cutting arc structure on the arc-isolating sheet, when the circuit breaker breaks an arc, a large amount of heat is generated, the arc-isolating sheet is thin, the strength is insufficient, the circuit breaker is easy to deform at high temperature, and the moving contact may touch the arc-isolating sheet and adhere together when moving, thereby the circuit breaker is not electrified. Disclosure of utility model In order to overcome the defects of the background technology, the utility model provides an arc cutting structure of a circuit breaker, which mainly solves the problem that the arc cutting structure of the current circuit breaker is arranged on an arc separation sheet and possibly fails. The technical proposal of the utility model is that, The arc cutting structure of the circuit breaker comprises a shell, wherein a moving contact, a fixed contact and at least two arc baffles are arranged in the shell, an exhaust channel is formed between the two arc baffles, and the circuit breaker further comprises And the convex rib is arranged on the inner wall of the shell, and at least the convex rib is arranged between the moving contact and the fixed contact during opening. The convex rib and the shell are integrally manufactured. The surface of the arc-shaped plate is a smooth plane. The convex ribs comprise first convex ribs which transversely extend, and the first convex ribs are correspondingly arranged above the fixed contact. The convex ribs comprise second convex ribs extending longitudinally, and the second convex ribs are arranged between the moving contact and the fixed contact during opening. One end of the second convex rib is connected with the first convex rib. One end of the second convex rib faces to the exhaust channel. The inner wall of the shell is provided with a sinking groove, and the arc-isolating plate is arranged in the sinking groove. A boss is arranged in the sinking groove, and a mounting hole matched with the boss is formed in the arc-isolating plate. The arc cutting structure of the circuit breaker has the beneficial effects that the arc cutting structure is arranged on the inner wall of the shell, and the arc barrier only keeps the effect of generating gas to prevent failure. Drawings Fig. 1 is a schematic structural view of an embodiment of the present utility model. Fig. 2 is an enlarged schematic view at a in fig. 1. Fig. 3 is a partial perspective view of an embodiment of the present utility model. Detailed Description The utility model is further described below with reference to the accompanying drawings, and the arc cutting structure of the circuit breaker comprises a shell 1, wherein a moving contact 3, a fixed contact 4 and at least two arc baffles 2 are arranged in the shell, an exhaust channel 21 is formed between the two arc baffles, the arc cutting structure also comprises a convex rib 5 which is arranged on the inner wall of the shell, and at least the convex rib is arranged between the moving contact and the fixed contact during opening. The arc isolation sheet is only in a plane shape, no cutting protrusions are arranged, the gas production effect is reserved, the arc is cut through the convex ribs added on the shell, and the phenomenon that the arc isolation sheet is adhered to the moving contact due to rib deformation during breaking is avoided, so that the product is not electrified is avoided. The arc-isolating sheet is made of gas-generating material, which is the prior art and will not be described in detail. The moving contact and the fixed contact are arranged between the moving contact and the fixed contact, and the moving contact and the fixed contact are not arranged on the moving track of the moving contact, and can be arranged on one side (such as the lower side) of the moving track, so that the moving contact is not influenced, and when the breaker breaks, an arc can run to a convex rib to cut. In this embodiment, as shown, the ribs are integrally formed with the housing. In particular, the plastic can be integrally processed by injection molding and the like. In this embodiment, as shown in the figure, the surface of the arc-shaped plate is a smooth plane. In this embodiment, as shown in the drawing, the rib includes a first rib 51 extending transversely, and the first rib is correspondingly disposed above the fixed contact. Increasing the effectiveness of the cutting arc. The lateral extension here is a substantially lateral extension and does not require parallelism with the horizontal line. In this embodiment, as shown in the drawing, the rib includes a second rib 52 extending longitudinally, and the second rib is disposed between the moving contact and the fixed contac