CN111834178A

CN111834178A - Arc extinguishing system of circuit breaker

Info

Publication number: CN111834178A
Application number: CN202010781323.4A
Authority: CN
Inventors: 刘时胜; 王斌; 候志红; 付志强
Original assignee: Jiangxi Hangtong Electric Technology Co ltd; Shanghai Retel Electric Technology Co ltd
Current assignee: Jiangxi Hangtong Electric Technology Co ltd; Shanghai Retel Electric Technology Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-10-27

Abstract

The invention relates to the technical field of circuit breakers, in particular to an arc extinguishing system of a circuit breaker, which comprises: the arc extinguishing device comprises a fixed contact, an arc isolating plate is clamped between two contacts of the fixed contact, an arc striking plate penetrates through the arc isolating plate, arc extinguishing chambers are arranged on the arc isolating plate, arc extinguishing grid pieces are fixedly arranged in the arc extinguishing chambers, arc extinguishing plates are arranged on the arc extinguishing grid pieces, and moving contacts corresponding to the fixed contact are movably arranged on one side of the fixed contact close to the contacts.

Description

Arc extinguishing system of circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to an arc extinguishing system of a circuit breaker.

Background

The existing circuit breaker generally comprises an arc extinguishing device, a tripping device, a contact system, an operating mechanism and the like, electric arcs can be generated when moving and static contacts of the circuit breaker are separated, and because the moving path of a contact arm of a moving contact is in a cavity of an arc extinguishing grid sheet, the electric arcs can enter the arc extinguishing chamber in the generation process, the electric arcs are led between the grid sheets through the arc extinguishing grid sheet, the electric arcs are cut into short arcs connected in series, the electric arcs are thinned, the voltage drop of the electric arcs is rapidly improved, and the arc extinguishing effect is achieved;

the arc extinguishing system of current circuit breaker is an explosion chamber usually, adopts the interval to place the arc extinguishing bars piece in the explosion chamber usually, increases the arc extinguishing effect from this, but this mode can lead to the increase of arc extinguishing system spatial arrangement, and for this reason, we have proposed the arc extinguishing system of a circuit breaker with the above-mentioned drawback of good solution.

Disclosure of Invention

The present invention is directed to an arc extinguishing system of a circuit breaker, which solves the above problems of the prior art.

The above object of the present invention is achieved by the following technical solutions:

an arc extinguishing system of a circuit breaker, comprising: the static contact, press from both sides between two contacts of static contact and be equipped with the flash barrier, run through on the flash barrier and be provided with the run-on plate, be provided with the explosion chamber on the flash barrier, the fixed arc extinguishing bars piece that is provided with in the explosion chamber, be provided with the arc extinguishing plate on the arc extinguishing bars piece, the static contact is close to one side activity of contact and is provided with the moving contact rather than corresponding setting.

Further, the arc extinguishing bars are a plurality of pieces, and a plurality of arc extinguishing bars are evenly distributed in the arc extinguishing chamber, one side integrated into one piece that the arc-isolating plate was kept away from to the arc extinguishing bars is provided with a plurality of arch, a plurality of the arch runs through and pegs graft on the arc-extinguishing plate, and the equidistance distributes between a plurality of arc extinguishing bars.

Furthermore, the arc extinguishing grid plate is made of magnetic steel plates.

Further, the explosion chamber is two, two the explosion chamber symmetric distribution is in flash barrier both sides, and just two explosion chamber one side are through striking the arc board intercommunication.

Furthermore, two arc extinguishing chambers are distributed on two sides of the arc isolating plate in an up-and-down overlapping mode.

Furthermore, the arc striking plate is arranged on one side of the arc isolating plate far away from the static contact, and the moving contact is arranged between the arc striking plate and the static contact.

Compared with the prior art, the invention provides an arc extinguishing system of a circuit breaker, which has the following beneficial effects:

1. according to the invention, after the moving contact is opened, two sections of electric arcs are generated between the moving contact and the static contact, the two sections of electric arcs are respectively introduced into the two arc extinguishing chambers under the action of the arc extinguishing grid pieces, and the arc striking plate is used as a medium for connecting the two sections of electric arcs in series, so that the length of the whole arc extinguishing system after the electric arcs are generated is maximized; the arc isolating plate is used for isolating the two arc extinguishing chambers;

2. according to the invention, the two arc extinguishing chambers are arranged on the arc-isolating plate in an up-and-down overlapping manner, so that the width space arrangement of the arc extinguishing system can be reduced, and meanwhile, two sections of electric arcs and two corresponding arc extinguishing chambers are generated by a circuit, so that the electric arcs can be extinguished more quickly compared with the traditional single arc extinguishing chamber.

Drawings

FIG. 1 is a schematic front view of the present invention;

fig. 2 is a schematic diagram of the back structure of the present invention.

In the figure: 1-static contact; 2-an arc isolating plate; 3-arc striking plate; 4-an arc extinguishing chamber; 5, arc extinguishing grid pieces; 6-arc extinguishing plate; 7-moving contact; 8-bulge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1 to 2, the present invention provides a technical solution: an arc extinguishing system of a circuit breaker, comprising: the static contact 1, the arc-isolating plate 2 is clamped between two contacts of the static contact 1, the arc-striking plate 3 is arranged on the arc-isolating plate 2 in a penetrating way, the arc-extinguishing chamber 4 is arranged on the arc-extinguishing chamber 2, the arc-extinguishing grid 5 is fixedly arranged in the arc-extinguishing chamber 4, the arc-extinguishing plate 6 is arranged on the arc-extinguishing grid 5, the moving contact 7 arranged corresponding to the static contact 1 is movably arranged on one side of the static contact 1 close to the contacts, the arc-extinguishing grid 5 is a plurality of arc-extinguishing grid pieces, the arc-extinguishing grid pieces 5 are uniformly distributed in the arc-extinguishing chamber 4, a plurality of bulges 8 are integrally formed on one side of the arc-extinguishing grid piece far away from the arc-isolating plate 2, the plurality of bulges 8 are inserted on the arc-extinguishing plate 6 in a penetrating way and distributed among the arc-extinguishing grid pieces 5 at equal intervals, the arc-extinguishing grid pieces 5 are made of magnetic steel sheets, after the moving contact 7 is opened, two sections of electric arcs are generated between the moving contact 7 and the static contact 1, the two sections of electric arcs are respectively introduced into the two arc extinguishing chambers 4 under the action of the arc extinguishing grid pieces 5, and the arc striking plate 3 is used as a medium for connecting the two sections of electric arcs in series, so that the length of the whole arc extinguishing system after the electric arcs are generated is maximized; and the arc-insulating plate 2 is used for insulating the two arc-extinguishing chambers 4.

Wherein, explosion chamber 4 is two, 4 symmetric distribution in flash barrier 6 both sides of two explosion chambers, and 3 intercommunications of striking plate are passed through to two explosion chambers 4 one side, the both sides of flash barrier 6 are distributed to two explosion chambers 4 adoption upper and lower superimposed mode, arrange on flash barrier 2 through adopting upper and lower superimposed mode with two explosion chambers 4, can make the width space of arc extinguishing system arrange and can reduce, two explosion chambers 4 that the circuit will produce two sections electric arcs and correspond with it simultaneously, compare in traditional single explosion chamber 4 can be faster extinguish electric arc.

The working principle is as follows: in the using process of the invention, after the moving contact 7 is opened, two sections of electric arcs are generated between the moving contact 7 and the static contact 1, the two sections of electric arcs are respectively introduced into the two arc extinguish chambers 4 under the action of the arc extinguish grid sheets 5, and the arc striking plate 3 is used as a medium for connecting the two sections of electric arcs in series, so that the length of the whole arc extinguish system after the electric arcs are generated is maximized; and the flash barrier 2 is used for completely cutting off two explosion chambers 4, arranges on the flash barrier 2 through adopting upper and lower superimposed mode with two explosion chambers 4, can make the width space of arc extinguishing system arrange and can reduce, and the circuit will produce two sections electric arcs and two explosion chambers 4 that correspond with it simultaneously, compares in traditional single explosion chamber 4 can be faster extinguish electric arc.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An arc extinguishing system of a circuit breaker, comprising: static contact (1), its characterized in that: the arc-extinguishing plate is characterized in that an arc-isolating plate (2) is clamped between two contacts of the static contact (1), an arc striking plate (3) penetrates through the arc-isolating plate (2), an arc-extinguishing chamber (4) is arranged on the arc-isolating plate (2), an arc-extinguishing grid piece (5) is fixedly arranged in the arc-extinguishing chamber (4), an arc-extinguishing plate (6) is arranged on the arc-extinguishing grid piece (5), and a moving contact (7) which is arranged correspondingly to the static contact is movably arranged on one side, close to the contacts, of the static contact (1).

2. The arc extinguishing system of a circuit breaker according to claim 1, wherein: arc extinguishing bars piece (5) are a plurality of, and a plurality of arc extinguishing bars piece (5) evenly distributed is in explosion chamber (4), one side integrated into one piece that arc extinguishing bars piece kept away from flash barrier (2) is provided with a plurality of arch (8), a plurality of arch (8) run through and peg graft on arc extinguishing plate (6), and the equidistance distributes between a plurality of arc extinguishing bars piece (5).

3. The arc extinguishing system of a circuit breaker according to claim 1, wherein: the arc extinguishing grid plate (5) is made of magnetic steel sheets.

4. The arc extinguishing system of a circuit breaker according to claim 1, wherein: the arc extinguishing chambers (4) are two, two the arc extinguishing chambers (4) are symmetrically distributed on two sides of the arc isolating plate (6), and one sides of the two arc extinguishing chambers (4) are communicated through the arc striking plates (3).

5. The arc extinguishing system of a circuit breaker according to claim 1, wherein: two arc extinguish chambers (4) adopt the mode of upper and lower stack to distribute the both sides of flash barrier (6).

6. The arc extinguishing system of a circuit breaker according to claim 1, wherein: the arc striking plate (3) is arranged on one side, away from the contact of the static contact (1), of the arc isolating plate (6), and the contact of the moving contact (7) is located between the arc striking plate (3) and the static contact.