CN219144059U

CN219144059U - Contact structure for vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber

Info

Publication number: CN219144059U
Application number: CN202223418405.6U
Authority: CN
Inventors: 张天培
Original assignee: Huaguang Electronics Co ltd
Current assignee: Huaguang Electronics Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-06-06
Anticipated expiration: 2032-12-20

Abstract

The utility model relates to a contact structure for a vacuum arc-extinguishing chamber and the vacuum arc-extinguishing chamber, which are characterized by comprising a static contact seat, a moving contact, a moving conducting rod and a static conducting rod, wherein at least 4 longitudinal grooves are formed in the side wall of the static contact seat, one side of each longitudinal groove, which is close to the moving contact, is provided with an opening, and the static contact seat is provided with a contact piece which is mutually separated from or contacted with the moving contact. According to the utility model, the longitudinal regulation and control of the electric arc are realized by adopting the longitudinal groove, and meanwhile, the magnet is additionally arranged, so that the electric arc can quickly enter the longitudinal groove through the magnet after being generated at the center of the contact piece, and thus, the electric arc is prevented from gathering; in addition, the center of the moving contact is also provided with a corresponding arc striking groove, and the arc striking groove radiates from the center to the periphery, so that an electric arc is led out, quick arc extinction is realized, and the breaking capacity is improved.

Description

Contact structure for vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber

Technical Field

The utility model belongs to the technical field of vacuum arc-extinguishing chambers, and particularly relates to a contact structure for a vacuum arc-extinguishing chamber and the vacuum arc-extinguishing chamber.

Background

Vacuum interrupters are an important component in vacuum circuit breakers, and in order to improve the short circuit breaking capability of high voltage vacuum interrupters, magnetic fields are generally introduced into the interrupters to control the vacuum arc, which are mainly divided into longitudinal magnetic fields and transverse magnetic fields. However, in the traditional transverse magnetic contact structure, the magnetic field intensity in the central area of a contact gap is weaker, the magnetic blowing force cannot meet the arc extinguishing requirement, the longitudinal magnetic field contact can control the form of an electric arc in the arcing period, the electric arc aggregation and the generation of anode spots are inhibited, the ablation of the contact surface is reduced, and the breaking performance of the contact is superior to that of the transverse magnetic field contact under a higher voltage level.

The traditional longitudinal magnetic contact system has the advantages that the movable contact and the fixed contact are both longitudinal magnetic field contacts, the system is suitable for common large-opening-distance arc breaking, and when the current is rapidly transferred and short-gap arc is broken, the longitudinal magnetic field is redundant. Meanwhile, the traditional cup-shaped longitudinal magnetic contact system has low mechanical strength, large moving part mass, low contact separation speed and insufficient breaking capacity, and is not suitable for a high-capacity vacuum arc-extinguishing chamber.

Therefore, how to improve the current capacity and the breaking performance of the vacuum arc-extinguishing chamber has become an urgent problem to be solved in the research of the vacuum arc-extinguishing chamber.

Disclosure of Invention

The utility model aims to provide a contact structure for a vacuum arc-extinguishing chamber and the vacuum arc-extinguishing chamber, and the contact structure improves the current capacity and the switching-on and switching-off performance of the vacuum arc-extinguishing chamber.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a contact structure for vacuum interrupter, its characterized in that includes static contact seat, moving contact, moving conductive pole and static conductive pole, be provided with 4 at least longitudinal grooves on the lateral wall of static contact seat, longitudinal groove is close to moving contact one side and is open setting, be provided with the contact piece on the static contact seat, the contact piece with the moving contact separates or contacts each other.

The utility model further provides that the static contact seat, the static conducting rod and the contact blade are arranged coaxially.

The utility model further provides that the movable contact, the movable conducting rod and the contact blade are arranged coaxially.

The utility model further provides that the static contact seat is of a cylindrical structure, and the longitudinal grooves are uniformly distributed along the circumferential direction of the static contact seat.

The utility model further provides that the longitudinal groove is provided with a blocking surface on the static contact seat, an opening is formed in the blocking surface, and a magnet is arranged in the opening.

The utility model further provides that the cross-sectional area of the contact blade is smaller than the cross-sectional area of the static contact seat, wherein the contact blade does not shield the opening of the longitudinal groove.

The utility model further provides that the upper end face of the moving contact is provided with arc striking grooves which are distributed in a radiation mode.

The utility model also provides a vacuum arc-extinguishing chamber which is characterized by comprising the contact structure.

The utility model has the beneficial effects that: according to the utility model, the longitudinal regulation and control of the electric arc are realized by adopting the longitudinal groove, and meanwhile, the magnet is additionally arranged, so that the electric arc can quickly enter the longitudinal groove through the magnet after being generated at the center of the contact piece, and thus, the electric arc is prevented from gathering; in addition, the center of the moving contact is also provided with a corresponding arc striking groove, and the arc striking groove radiates from the center to the periphery, so that an electric arc is led out, quick arc extinction is realized, and the breaking capacity is improved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a perspective view of an embodiment of the present utility model.

Fig. 3 is an enlarged view of fig. 1 at i.

Reference numerals;

10. a static contact seat; 20. a moving contact; 30. a movable conductive rod; 40. a static conductive rod; 50. a longitudinal slot; 60. a contact blade; 70. a blocking surface; 80. opening holes; 90. an arc striking groove;

Detailed Description

The following will describe the embodiments of the present application in detail by way of examples, and therefore, how the present application applies technical means to solve the technical problems and achieve the implementation process of the technical effects can be fully understood and implemented accordingly.

As shown in fig. 1-3, the present utility model is a contact structure for a vacuum arc extinguishing chamber, including a static contact base 10, a moving contact 20, a moving conductive rod 30 and a static conductive rod 40, at least 4 longitudinal grooves 50 are provided on a side wall of the static contact base 10, one side of the longitudinal grooves 50 close to the moving contact 20 is an open, a contact blade 60 is provided on the static contact base 10, and the contact blade 60 and the moving contact 20 are separated from each other or contacted with each other.

Wherein the stationary contact base 10, the stationary conductive rod 40 and the contact blade 60 are arranged coaxially.

Wherein the movable contact 20, the movable conductive rod 30 and the contact blade 60 are coaxially arranged.

Wherein the stationary contact base 10 has a cylindrical structure, and the longitudinal grooves 50 are uniformly distributed along the circumferential direction thereof.

The longitudinal groove 50 is formed with a blocking surface 70 on the fixed contact seat 10, an opening 80 is formed on the blocking surface 70, and a magnet is disposed in the opening 80.

Wherein the cross-sectional area of the contact blade 60 is smaller than the cross-sectional area of the stationary contact base 10, wherein the contact blade 60 does not obstruct the opening of the longitudinal slot 50.

The upper end face of the moving contact 20 is provided with an arc striking groove 90, and the arc striking groove 90 is in radiation distribution.

The utility model also provides a vacuum arc-extinguishing chamber, which comprises the contact structure.

According to the utility model, the longitudinal regulation and control of the electric arc are realized by adopting the longitudinal groove 50, and meanwhile, the magnet is additionally arranged, so that the electric arc can rapidly enter the longitudinal groove 50 through the magnet after being generated at the center of the contact piece, and thus, the electric arc is prevented from gathering; in addition, the center of the movable contact 20 is also provided with a corresponding arc striking groove 90, and the arc striking groove 90 radiates from the center to the periphery, so that an electric arc is led out, quick arc extinction is realized, and the breaking capacity is improved.

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a contact structure for vacuum interrupter, its characterized in that includes static contact seat, moving contact, moving conductive pole and static conductive pole, be provided with 4 at least longitudinal grooves on the lateral wall of static contact seat, longitudinal groove is close to moving contact one side and is open setting, be provided with the contact piece on the static contact seat, the contact piece with the moving contact separates or contacts each other.

2. The contact structure for a vacuum interrupter of claim 1, wherein said stationary contact base, stationary conductive rod and said contact blade are coaxially disposed.

3. A contact structure for a vacuum interrupter as defined in claim 2, wherein said movable contact, movable conductive rod and contact blade are coaxially disposed.

4. A contact structure for a vacuum interrupter as defined in claim 3, wherein said stationary contact base is of cylindrical configuration, and said longitudinal grooves are uniformly distributed along the circumferential direction thereof.

5. The contact structure for a vacuum interrupter as defined in claim 4, wherein said longitudinal slot has a blocking surface formed on said stationary contact base, said blocking surface having an opening therein, said opening having a magnet disposed therein.

6. The contact structure for a vacuum interrupter of claim 5, wherein said contact blade has a cross-sectional area smaller than a cross-sectional area of said stationary contact base, wherein said contact blade does not obstruct an opening of said longitudinal slot.

7. The contact structure for a vacuum interrupter as defined in claim 6, wherein the upper end surface of the moving contact is provided with arc striking grooves, and the arc striking grooves are distributed in radiation.

8. A vacuum interrupter comprising a contact structure according to any one of claims 1-7.