CN220041646U - Arc extinguishing chamber structure of low-voltage circuit breaker - Google Patents

Abstract

The utility model discloses an arc extinguishing chamber structure of a low-voltage circuit breaker, which includes a shell. An arc extinguishing chamber is formed in the shell. Arc extinguishing grids are arranged at intervals in the arc extinguishing chamber. The arc chamber includes a first side wall and a second side wall, a first arc starting port is provided on the first side wall, and a static contact and an arc striking piece are provided in the housing corresponding to the position of the first arc starting port. The arc starting piece is connected to the static contact, and the arc starting piece extends into the arc extinguishing chamber through the first arc starting port. A magnetic yoke is provided on the second side wall. A second arc-starting port is provided, and the yoke has a traction piece extending toward the second arc-starting port, and the traction piece blocks the second arc-starting port. Its structure is simple, it can better start and extinguish arc, improve arc extinguishing efficiency, and has good use effect.

Description

Arc extinguishing chamber structure of low voltage circuit breaker

Technical field

The utility model relates to an arc extinguishing chamber structure of a low-voltage circuit breaker.

Background technique

A circuit breaker refers to a switching device that can close, carry, and break current under normal circuit conditions and can close, carry, and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. A low-voltage circuit breaker usually includes multiple unit components such as an operating mechanism, a tripping mechanism, and an arc extinguishing chamber. Currently, the arc extinguishing chamber of a circuit breaker is usually arranged around or close to the contacts of the switch to limit the arc space position and accelerate arc extinguishing. device, the current arc extinguishing chamber mainly uses an arc strike plate connected with the contact and extending into the arc extinguishing chamber to strike the arc. However, such an arc strike structure is not efficient in arc starting, making the arc extinguishing grid plate arc extinguishing effect ineffective. It is good and affects the use effect of the overall structure.

Utility model content

In view of the shortcomings of the existing technology, the present utility model provides an arc extinguishing chamber structure of a low-voltage circuit breaker. The structure is simple, can better carry out arc ignition and arc extinguishing, improves arc extinguishing efficiency, and has good use effects.

In order to achieve the above purpose, the utility model provides an arc extinguishing chamber structure of a low-voltage circuit breaker, which includes a shell, an arc extinguishing chamber is formed in the shell, and arc extinguishing grids are arranged at intervals in the arc extinguishing chamber. piece, the arc extinguishing chamber includes a first side wall and a second side wall, a first arc starting port is provided on the first side wall, and a static contact is provided in the housing corresponding to the first arc starting port. and an arc-starting piece, the arc-starting piece is connected to the static contact, the arc-starting piece extends into the arc-extinguishing chamber through the first arc-starting port, the second side wall is provided with a magnetic yoke, the A second arc starting port is provided on the second side wall, and the magnetic yoke has a traction piece extending toward the second arc starting port, and the traction piece blocks the second arc starting port.

The beneficial effect of this arrangement is that by using the above solution, the second arc opening is opened, the yoke is extended to form a pulling piece, and the second arc opening is shielded. The shielding here can be partial or complete shielding. , so that in the event of an emergency, the arc can be introduced from the second arc opening into the arc extinguishing chamber through the traction piece to perform more complete arc extinguishing, making the use of the overall structure safer and more reliable. At the same time, the structure is simple and has good Effect.

As a further arrangement of the present invention, side plates are formed on both sides of the pulling piece.

The beneficial effect of this arrangement is that by adopting the above solution, the area for arc ignition is further increased through the side plates, ensuring that the arc enters the arc extinguishing chamber and improving the arc extinguishing efficiency.

As a further arrangement of the present invention, a support protrusion is provided on the housing corresponding to the position of the side plate, and the side plate is disposed against the support protrusion.

The beneficial effect of this arrangement is that the above solution can further improve the stability of the installation of the yoke structure, provide support for the traction plate, avoid imbalance of the overall structure of the yoke, and ensure the overall use effect. At the same time, the structure is simple and facilitates implementation.

As a further arrangement of the present invention, the support protrusion extends toward the second side wall and is connected to the second side wall, and the yoke is disposed against the support protrusion.

The beneficial effect of this arrangement is that the above solution facilitates the positioning and installation of the yoke, improves the convenience of installation, and at the same time has a simple structure and facilitates implementation.

As a further arrangement of the present invention, baffle walls are provided on both sides of the yoke, and a positioning wall is provided in the housing corresponding to the baffle wall position for resisting against the edge of the baffle wall.

The beneficial effect of this arrangement is that, using the above solution, this arrangement further improves the stability of the yoke installation position and improves the convenience of installation.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

Figure 2 is a schematic diagram of the magnetic yoke structure in the embodiment of the present utility model.

Detailed ways

An embodiment of the arc-extinguishing chamber structure of a low-voltage circuit breaker of the present invention is shown in Figures 1 to 2: it includes a housing 1, an arc-extinguishing chamber 11 is formed in the housing 1, and the arc-extinguishing chamber 11 Arc extinguishing grids are arranged at intervals in the middle. The arc extinguishing chamber includes a first side wall and a second side wall. A first arc ignition port is provided on the first side wall. The corresponding first arc ignition port is provided in the housing 1. A static contact and an arc starting piece 3 are provided at the arc opening position. The arc starting piece 3 is connected to the static contact. The arc starting piece 3 extends into the arc extinguishing chamber 11 through the first arc starting opening. A magnetic yoke 2 is provided on the second side wall, and a second arc starting port is provided on the second side wall. The magnetic yoke 2 has a traction piece 21 extending toward the second arc starting opening, and the traction piece 21 blocks the On the second arc opening. The beneficial effect of this arrangement is that by adopting the above solution, the second arc starting port is opened, the yoke 2 is extended to form the pulling piece 21, and the second arc starting port is shielded. The shielding here can be partial shielding or partial shielding. Completely shielded, so that in the event of an emergency, the arc can be introduced from the second arc opening into the arc extinguishing chamber through the traction piece 21 to perform more sufficient arc extinguishing, making the use of the overall structure safer and more reliable, and at the same time, the structure is simple. Has good use effect.

As a further configuration of the present invention, side plates 22 are formed on both sides of the pulling piece 21 . The beneficial effect of this arrangement is that by adopting the above solution, the area used for arc ignition is further increased through the side plate 22 to ensure that the arc enters the arc extinguishing chamber 11 and improves the arc extinguishing efficiency.

As a further arrangement of the present invention, the housing 1 is provided with a support protrusion 12 at a position corresponding to the side plate 22 , and the side plate 22 is disposed against the support protrusion 12 . The beneficial effect of this arrangement is that the above solution can further improve the stability of the structural installation of the yoke 2, provide support for the traction plate, avoid imbalance of the overall structure of the yoke 2, and ensure the overall use effect. At the same time, the structure is simple and facilitates implementation.

As a further arrangement of the present invention, the support protrusion 12 extends toward the second side wall and is connected to the second side wall, and the yoke 2 is disposed against the support protrusion 12 . The beneficial effect of this arrangement is that the above solution facilitates the positioning and installation of the yoke 2 and improves the convenience of installation. At the same time, the structure is simple and facilitates implementation.

As a further arrangement of the present invention, blocking walls 23 are provided on both sides of the yoke 2 respectively, and a positioning wall 13 is provided in the housing 1 corresponding to the blocking wall 23 for resisting against the edge of the blocking wall 23 . The beneficial effect of this arrangement is that, using the above solution, this arrangement further improves the stability of the installation position of the yoke 2 and improves the convenience of installation.

The above examples are only one of the preferred specific examples of the present invention. Common changes and substitutions made by those skilled in the art within the technical scope of the present utility model are included in the protection scope of the present utility model.

Claims (5)

1. The utility model provides an explosion chamber structure of low voltage circuit breaker, includes the casing, be formed with the arc extinguishing cavity in the casing, the interval is provided with the arc extinguishing bars piece in the arc extinguishing cavity, the explosion chamber includes first lateral wall and second lateral wall, first striking mouth has been seted up on the first lateral wall, correspond first striking mouth position in the casing and be provided with stationary contact and striking piece, the striking piece is connected with the stationary contact, the striking piece extends in to the arc extinguishing cavity through first striking mouth, its characterized in that: the magnetic yoke is arranged on the second side wall, the second arc striking opening is arranged on the second side wall, the magnetic yoke extends to the second arc striking opening to form a traction piece, and the traction piece is shielded on the second arc striking opening.

2. The arc chute structure of a low voltage circuit breaker as claimed in claim 1, wherein: side plates are formed on two sides of the traction piece.

3. The arc chute structure of a low voltage circuit breaker as claimed in claim 2, wherein: the shell is provided with supporting protrusions corresponding to the side plates, and the side plates are arranged on the supporting protrusions in a collision mode.

4. The arc chute structure of a low voltage circuit breaker as claimed in claim 3, wherein: the support protrusion extends towards the second side wall and is connected with the second side wall, and the magnetic yoke is arranged on the support protrusion in a collision mode.

5. The arc chute structure of a low voltage circuit breaker according to claim 1 or 2 or 3 or 4, characterized in that: the magnetic yoke both sides are provided with the retaining wall respectively, correspond the retaining wall position in the casing and be provided with the locating wall that is used for contradicting at the retaining wall border.