CN219998144U

CN219998144U - Contact arc extinguishing device

Info

Publication number: CN219998144U
Application number: CN202321661058.1U
Authority: CN
Inventors: 林佳; 王云峰
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2023-11-10
Anticipated expiration: 2033-06-28

Abstract

A contact arc extinguishing device belongs to the technical field of piezoelectric devices. The explosion chamber comprises a shell, an explosion cavity is formed in the shell, the inner wall of the explosion cavity is made of insulating gas generating materials, and a protrusion part is arranged on the surface of the inner wall of the shell. The advantages are that: because the protruding part is additionally arranged on the inner wall of the arc-extinguishing chamber, after the electric arc is generated, the electric arc contacts the protruding part earlier than the electric arc contacts the inner wall of the arc-extinguishing chamber, so that the electric arc can be extinguished more quickly due to energy consumption, and the arc-extinguishing capability of the arc-extinguishing chamber is improved.

Description

Contact arc extinguishing device

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a contact arc extinguishing device.

Background

The switch is an important electric appliance in a power supply and distribution line, and can cut off the current carried by the switch to realize the disconnection of the circuit, thereby playing a role in protecting the line and electric equipment. The switch generally comprises a contact system, wherein the contact system comprises a moving contact and a fixed contact, and the moving contact is contacted with or separated from the fixed contact after acting, so that the switch can be switched on or switched off. As is known in the art, when a switch breaks, an arc is generated between a moving contact and a fixed contact, and if the arc stays on the moving contact for a long time, the contact is severely ablated due to relatively large arc energy. In view of this, an arc extinguishing chamber is also typically included in the switch for extinguishing an arc generated when the moving contact is separated from the stationary contact, and the circuit is opened only when the arc is extinguished. The arc extinguishing chamber has no doubt function in ensuring the safe operation of the electrical equipment.

With the development of new energy industry, the switch needs to cope with more and more direct current working environments, and because the current is not zero, the arc is difficult to be extinguished, at the moment, the switch cannot break the circuit, even if the arc is not extinguished rapidly, safety accidents can be caused, and the problem is a core problem which puzzles a plurality of technicians in the field. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to provide a contact arc-extinguishing device which can increase the contact surface between an arc and the inner wall of a shell, rapidly extinguish the arc and improve the arc-extinguishing capability of an arc-extinguishing chamber.

The utility model aims at achieving the aim, and the contact arc extinguishing device comprises an arc extinguishing chamber, wherein the arc extinguishing chamber comprises a shell, an arc extinguishing cavity is formed in the shell, and the inner wall of the arc extinguishing cavity is made of an insulating gas generating material, and the contact arc extinguishing device is characterized in that: a protrusion is provided on the inner wall surface of the housing.

In a specific embodiment of the present utility model, the housing is configured in a u shape, and includes a top case and a pair of side walls disposed on both sides of the top case, and the protruding portion is a strip-shaped rib.

In another specific embodiment of the present utility model, at least two ribs are arranged at intervals, the ribs are transverse ribs, and the transverse ribs are arranged on the inner surface of the top case and extend in the left-right direction of the arc extinguishing chamber.

In yet another specific embodiment of the present utility model, the transverse ribs extend from the inner surface of the top shell to the inner surfaces of the pair of side walls.

In still another specific embodiment of the present utility model, the lower end portions of the pair of side walls are folded and closed face to each other to form a pair of end portions, and a gap is formed between the pair of end portions, and the gap is used for penetration of the moving contact.

In a further specific embodiment of the present utility model, the number of the protruding ribs is at least two and the protruding ribs are arranged at intervals, the protruding ribs are vertical ribs, and the vertical ribs are arranged on the inner surface of the shell and extend in the front-rear direction of the arc extinguishing chamber.

In still another specific embodiment of the present utility model, the housing has a slot cavity formed by two adjacent vertical ribs on the lower surface of the top housing and corresponding to the opening direction of the moving contact relative to the fixed contact, and a gap is formed between the slot cavity and the pair of end portions.

In a further specific embodiment of the present utility model, the arc extinguishing chamber further includes a magnetic conductive member, and the magnetic conductive member has a u-shaped structure and is covered outside the housing.

In yet another embodiment of the present utility model, the magnetic conductive member is attached to the outer surfaces of the top case and the pair of side walls.

In yet another specific embodiment of the present utility model, the arc extinguishing chamber further includes a permanent magnet, the permanent magnet is attached to an outer side of the top case, and a magnetic field direction corresponds to a height direction of the arc extinguishing chamber.

According to the utility model, the protruding part is additionally arranged on the inner wall of the arc-extinguishing chamber, so that after the arc is generated, the arc and the inner wall of the arc-extinguishing chamber have a larger contact surface, and therefore, the arc can be extinguished more quickly due to energy consumption, and the arc-extinguishing capability of the arc-extinguishing chamber is further improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

fig. 2 is a front-rear sectional view of the arc chute according to the first embodiment of the present utility model;

fig. 3 is a bottom cross-sectional view of the arc chute of the first embodiment of the utility model;

fig. 4 is a partial cross-sectional view of an arc chute according to a first embodiment of the present utility model;

fig. 5 is a front-rear sectional view of an arc chute according to a second embodiment of the present utility model;

fig. 6 is a front-rear sectional view of an arc chute according to a third embodiment of the present utility model;

fig. 7 is a front-rear sectional view of an arc chute according to a fourth embodiment of the present utility model;

fig. 8 is a bottom cross-sectional view of an arc chute according to a fourth embodiment of the utility model;

fig. 9 is a front-rear sectional view of an arc chute according to a fifth embodiment of the present utility model;

fig. 10 is a front-rear sectional view of an arc chute according to a sixth embodiment of the present utility model;

fig. 11 is a schematic front-rear view of an arc chute according to a seventh embodiment of the present utility model.

In the figure: 1. arc extinguishing chamber, 11, shell, 111, top shell, 1111, mounting cavity, 112, side wall, 113, end, 12, magnetic conduction piece, 13, permanent magnet; 2. the contact system, 21. Moving contact, 22. Static contact; 100. transverse ribs; 200. vertical ribs and 201, narrow slit cavity.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions (or azimuths) of up, down, left, right, front and rear are directed to the position states where the drawings are being described, so as to facilitate public understanding, and thus should not be construed as being particularly limiting to the technical solutions provided by the present utility model.

Referring to fig. 1, the present utility model relates to a contact arc extinguishing device, which comprises an arc extinguishing chamber 1 and a contact system 2, wherein the contact system 2 further comprises a moving contact 21 and a fixed contact 22. The moving contact 21 contacts or separates from the fixed contact 22 after acting, so that the switch comprising the contact arc extinguishing device is closed or opened. In this embodiment, the moving contact 21 is rotationally matched with the fixed contact 22, and of course, other movement tracks, such as translational movement, are adopted for the moving contact 21, which also falls within the protection scope of the present utility model.

The movable contact 21 may be referred to as a movable conductive rod, and the stationary contact 22 may be referred to as a stationary conductive rod. Normally, the moving contact 21 is provided with a moving contact at a position contacting the fixed contact 22, the fixed contact 22 is provided with a fixed contact at a position corresponding to the moving contact, and the moving contact contacts with or out of contact with the fixed contact, thereby realizing on or off of the switch. When the movable contact 21 is separated from the fixed contact 22, an arc is generated between the movable contact 21 and the fixed contact 22, and the arc is extinguished by the arc extinguishing chamber 1, so that the arc extinguishing chamber 1 needs to correspond to the area where the arc is generated, i.e. the position of the arc extinguishing chamber 1 needs to correspond to the contact system 2. In the present solution, the arc extinguishing chamber 1 is located in the path of the arc.

As shown in fig. 2 and 3, the arc extinguishing chamber includes a housing 11, and an arc extinguishing chamber is formed inside the housing 11. The housing 11 includes a top case 111 and a pair of side walls 112 provided on both sides of the top case 111. The top case 111 constitutes a top portion of the arc extinguishing chamber 1, and the pair of side walls 112 are located at both sides of the arc extinguishing chamber 1, constituting both side portions of the arc extinguishing chamber 1. The top shell 111 and the pair of side walls 112 form a u-shaped three-sided enclosure structure. The shell 11 is made of an insulating gas generating material, or at least, the inner wall of the shell 11 is made of the insulating gas generating material, or the insulating gas generating material wraps the inner wall of the shell 11. The moving contact 21 of the contact system 2 extends into the arc extinguishing chamber.

The technical point of the present utility model is that the inner surface of the housing 11 has a protrusion, and the protrusion is a strip-shaped rib.

Example 1:

with continued reference to fig. 2 and 3, in this embodiment, at least two ribs are disposed at intervals, and the ribs are transverse ribs 100. The lateral rib 100 is provided on the inner surface of the case 11 and extends in the right-left direction of the arc extinguishing chamber 1. Specifically, the cross bar 100 extends from the inner surface of the top shell 111 to the inner surfaces of the pair of side walls 112. When an arc occurs in the arc extinguishing chamber 1, the arc contacts the transverse ribs 100 relative to the inner wall of the shell 11, so that the arc can be consumed earlier and extinguished quickly.

As shown in fig. 4, after the arc moves, the arc is lengthened due to the blocking of the transverse rib 100 because the transverse rib 100 is additionally arranged in the arc extinguishing chamber 1, and then the arc can be extinguished rapidly.

Example 2:

as shown in fig. 5, the arc extinguishing chamber 1 further includes a magnetic conductive member 12, where the magnetic conductive member 12 is u-shaped and is covered on the housing 11. Specifically, the magnetic conductive member 12 is attached to the outer surfaces of the top case 111 and the pair of side walls 112. More preferably, the outer surfaces of the top case 111 and the pair of side walls 112 are provided with accommodating cavities, and the magnetic conductive member 12 is embedded in the accommodating cavities, so that a better fixing and mounting effect is achieved. The magnetic conductive member 12 is arranged to accelerate the movement of the arc, so that the arc can be extinguished more rapidly.

Example 3:

as shown in fig. 6, the arc extinguishing chamber 1 further includes a permanent magnet 13, and the permanent magnet 13 is attached to the outer side of the top case 111, that is, above the top of the arc extinguishing chamber 1. The magnetic field direction of the permanent magnet 13 corresponds to the height direction of the arc extinguishing chamber 1, specifically, the N pole or S pole of the permanent magnet 13 is attached to the outer surface of the top case 111. The arrangement of the permanent magnets 13 also accelerates the movement of the arc, which in turn enables the arc to be extinguished more quickly.

Example 4:

as shown in fig. 7 and 8, there is still another embodiment of the arc extinguishing chamber 1, which differs from embodiment 1 in that: the lower end portions of the pair of side walls 112 are folded toward the middle of the arc extinguishing chamber 1 to form a pair of end portions 113. The pair of end portions 113 are located at the lower portion of the arc extinguishing chamber 1, and a gap is formed between the pair of end portions 113, and the gap is used for the penetration of the movable contact 21.

In this embodiment, at least two ribs are arranged at intervals, the ribs are vertical ribs 200, and the vertical ribs 200 are arranged on the inner surface of the housing 11. When an arc is generated in the arc extinguishing chamber 1, the arc contacts the vertical ribs 200 relative to the inner wall of the shell 11, so that the arc can be consumed earlier and then extinguished quickly. The extending direction of the vertical rib 200 is the front-back direction of the arc extinguishing chamber 1, that is, the extending direction of the vertical rib 200 is consistent with the direction of stretching the arc when the moving contact 21 and the fixed contact 22 are opened. Preferably, two adjacent vertical ribs 200 are provided on the lower surface of the top case 111 and corresponding to the opening directions of the movable contact 21 and the fixed contact 22, a narrow slit cavity 201 is formed between the two vertical ribs 200, and a gap is formed between the narrow slit cavity 201 and the pair of end portions 113. The slot 201 can better limit the arc and accelerate the extinction of the arc.

Example 5:

as shown in fig. 9, in this embodiment, a magnetic conductive member 12 is added to the arc extinguishing chamber 1 described in embodiment 4. The form, mounting method and use of the magnetic conductive member 12 are the same as those of example 2.

Example 6:

as shown in fig. 10, in this embodiment, a permanent magnet 13 is added to the arc extinguishing chamber 1 described in embodiment 4, and the form, mounting manner and use of the permanent magnet 13 are the same as those of embodiment 3.

Example 7:

as shown in fig. 11, in the present embodiment, a mounting cavity 1111 protruding into the arc extinguishing chamber is provided in the top case 111, the mounting cavity 1111 is used for inserting the permanent magnet 13, and vertical ribs 200 are provided inside the top case 111 and the pair of side walls 112. Magnetic conducting pieces 12 are arranged outside the shell 11 and on two sides of the permanent magnet 13.

In each of the above embodiments, since the ribs are provided on the inner wall of the housing 11, the arc has a larger contact surface when contacting the inner wall of the housing 11, so that the arc can consume energy and extinguish rapidly. Of course, as the core of the utility model, the ribs are replaced by a plurality of protrusions to replace the strip-shaped ribs, and the utility model is also in the protection scope of the utility model. The protrusions can be used to cover various protrusions, thereby fully embodying the core of the present utility model.

Claims

1. The utility model provides a contact arc extinguishing device, includes explosion chamber (1), explosion chamber (1) include casing (11), the inside of casing (11) be formed with the arc extinguishing chamber, the inner wall in arc extinguishing chamber comprises insulating gas production material, its characterized in that: a protrusion is provided on the inner wall surface of the housing (11).

2. The contact quenching device as claimed in claim 1, wherein: the shell (11) is formed into a u shape and comprises a top shell (111) and a pair of side walls (112) which are respectively arranged at two sides of the top shell (111), and the protruding parts are strip-shaped convex ribs.

3. A contact quenching device as claimed in claim 2, wherein: the protruding ribs are arranged at least two at intervals, the protruding ribs are transverse ribs (100), and the transverse ribs (100) are arranged on the inner surface of the top shell (111) and extend in the left-right direction of the arc extinguishing chamber (1).

4. A contact quenching device as claimed in claim 3, wherein: the cross rib (100) extends from the inner surface of the top shell (111) to the inner surfaces of the pair of side walls (112).

5. A contact quenching device as claimed in claim 2, wherein: the lower end parts of the pair of side walls (112) are bent and close to each other face to form a pair of end parts (113), and a gap is formed between the pair of end parts (113) and is used for penetrating the moving contact (21).

6. The contact quenching device as claimed in claim 5, wherein: the number of the convex ribs is at least two, the convex ribs are arranged at intervals, the convex ribs are vertical ribs (200), and the vertical ribs (200) are arranged on the inner surface of the shell (11) and extend in the front-back direction of the arc extinguishing chamber (1).

7. The contact quenching device as claimed in claim 6, wherein: the shell (11) is provided with a narrow slit cavity (201) formed by two adjacent vertical ribs (200) on the lower surface of the top shell (111) and corresponding to the opening direction of the movable contact (21) relative to the fixed contact (22), and a gap is formed between the narrow slit cavity (201) and the pair of end parts (113).

8. A contact quenching apparatus as claimed in claim 4 or 7, wherein: the arc extinguishing chamber (1) also comprises a magnetic conduction piece (12), wherein the magnetic conduction piece (12) is of a u-shaped structure and is covered on the outer side of the shell (11).

9. A contact quenching device as claimed in claim 8, wherein said magnetically permeable member (12) is attached to the outer surfaces of the top housing (111) and the pair of side walls (112).

10. A contact quenching apparatus as claimed in claim 4 or 7, wherein: the arc extinguishing chamber (1) further comprises a permanent magnet (13), the permanent magnet (13) is attached to the outer side of the top shell (111), and the magnetic field direction corresponds to the height direction of the arc extinguishing chamber (1).