CN111834179A

CN111834179A - Arc striking way of circuit breaker

Info

Publication number: CN111834179A
Application number: CN202010782773.5A
Authority: CN
Inventors: 王斌; 刘时胜; 候志红; 付志军
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 arc extinction of circuit breakers, in particular to an arc striking way of a circuit breaker, which comprises: the arc extinguishing device comprises an outer shell, wherein an arc striking plate is fixedly installed inside the outer shell, two arc striking chambers are formed between the upper surface and the lower surface of the arc striking plate and the outer shell, a partition plate is arranged at one end of each arc striking chamber, an arc striking groove is formed in the partition plate, one ends of the two arc striking chambers, which are close to the partition plate, are provided with arc striking channels, an exhaust groove communicated with the arc striking channels is integrally formed in the outer shell, the two arc striking channels are divided into two isolated parts by the outer shell and the arc striking plate, the arc striking channels are formed between one side, which is far away from the arc striking chambers, of the partition plate and the inner wall of the arc striking plate, and are L-shaped.

Description

Arc striking way of circuit breaker

Technical Field

The invention relates to the technical field of arc extinction of circuit breakers, in particular to an arc striking channel of a circuit breaker.

Background

The circuit breaker is connected and disconnected by a moving contact and a static contact, the static contact is generally fixedly arranged on a base, the moving contact is movably arranged, and the moving contact can be contacted with or separated from the static contact, so that the circuit breaker is connected or disconnected. The moving contact can produce electric arc after with the static contact separation, need extinguish electric arc rapidly, prevent its reignition.

The existing circuit breaker is usually provided with only one arc striking way when in use, so that electric arc is extinguished slowly, the electric arc can be re-ignited, and the breaking capacity of the circuit breaker is influenced.

Disclosure of Invention

The invention aims to provide an arc striking way of a circuit breaker, which aims to solve the problems in the prior art.

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

an arc runner for a circuit breaker, comprising: the shell body, the inside fixed mounting of shell body has the striking plate, form two explosion chambers between surface and the shell body about the striking plate, explosion chamber one end sets up the baffle, seted up the striking groove on the baffle, two the one end that the explosion chamber is close to the baffle is provided with the striking way, integrated into one piece be provided with in the shell body with the communicating air discharge duct of striking way.

Further, shell body and run-on plate will two run-on way separates into isolated two parts, run-on way is kept away from by the baffle and is formed between the one side of explosion chamber and the run-on plate inner wall, and run-on way is the L form.

Furthermore, the air outlets of the two arc ignition channels are respectively positioned at different ends of one side of the upper surface and the lower surface of the arc ignition plate.

Furthermore, the arc striking groove is a plurality of, and a plurality of the arc striking groove is parallel with the clearance before the arc extinguishing bars piece in the arc extinguishing chamber, and the arc striking groove communicates explosion chamber and arc striking way.

Furthermore, the exhaust duct is L-shaped, two arc striking way gas outlets are communicated with the exhaust duct, and one end of the exhaust duct far away from the arc striking way is communicated with the outside of the outer shell.

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

1. according to the invention, the two arc ignition channels are isolated by using the partition plate and the outer shell to form two independent arc ignition channels, so that the extinguishing of electric arcs is accelerated, and the sectioning capability of the circuit breaker is improved;

2. according to the invention, the clapboard and the arc striking groove are arranged at one end of the arc extinguishing chamber, so that free gas between arc extinguishing grid pieces in the arc extinguishing chamber can be conveniently and quickly discharged into the arc striking channel, and the phenomenon of re-burning of electric arc is avoided;

3. according to the invention, through the arrangement of the exhaust grooves, free gases in the two arc striking grooves are exhausted into the exhaust grooves and then are exhausted to the outside of the outer shell through the exhaust grooves, so that the arc extinguishing effect of the circuit breaker is prevented from being influenced by overhigh temperature in the outer shell.

Drawings

FIG. 1 is a schematic front view of an arc barrier according to the present invention;

FIG. 2 is a schematic view of the back structure of the flash barrier of the present invention;

FIG. 3 is a schematic view of the internal structure of the outer casing of the present invention;

fig. 4 is a schematic view of the internal cross-sectional structure of the outer case of the present invention.

In the figure: 1-an outer shell; 2-an arc isolating plate; 3-an arc extinguishing chamber; 4-a separator; 5-arc striking groove; 6-arc striking way; 7-exhaust groove.

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 4, the present invention provides a technical solution: an arc runner for a circuit breaker, comprising: shell body 1, the inside fixed mounting of shell body 1 has run-on plate 2, forms two explosion chambers 3 between 2 upper and lower surfaces of run-on plate and the

shell body

1, and 3 one end of explosion chamber sets up baffle 4, has seted up run-on groove 5 on the baffle 4, and two explosion chambers 3 are provided with run-on way 6 near the one end of baffle 4, and integrated into one piece is provided with and leads to the communicating air discharge duct 7 of arc way 6 in the shell body 1.

Wherein, shell body 1 and striking board 2 separate into isolated two parts with two arc striking way 6, arc striking way 6 is kept away from by baffle 4 and is formed between one side of

explosion chamber

3 and 2 inner walls of striking board, and arc striking way 6 is the L form, the gas outlet of two arc striking ways 6 is located the different ends of striking board 2 upper and lower one side respectively, utilize baffle 4 and shell body 1 to isolate two arc striking ways 6, form two mutually independent arc striking ways 6, thereby accelerate extinguishing of electric arc, the segmentation ability of circuit breaker has been improved.

Wherein, the striking groove 5 is a plurality of, and the clearance before the arc extinguishing bars piece in a plurality of striking groove 5 and the explosion chamber 3 is parallel, and striking groove 5 intercommunication explosion chamber 3 and striking way 6, sets up baffle 4 and striking groove 5 through the one end at explosion chamber 3, can make things convenient for free gas between the arc extinguishing bars piece to arrange to the striking way 6 fast in the explosion chamber 3 in, has avoided the phenomenon of reigniting of electric arc.

Wherein, exhaust duct 7 is the L form, and two arc striking way 6 gas outlets all communicate with each other with exhaust duct 7, and exhaust duct 7 keeps away from the one end of arc striking way 6 and the shell body 1 outside communicates with each other, through setting up exhaust duct 7, and the free gas in two arc striking grooves 5 is same arranges to exhaust duct 7 in, arranges to the outside of shell body 1 by exhaust duct 7 again, avoids the interior high temperature of shell body 1, influences the arc extinguishing effect of circuit breaker.

The working principle is as follows: in the using process of the invention, the two arc striking channels 6 are isolated by the partition plate 4 and the outer shell 1 to form two mutually independent arc striking channels 6, thereby accelerating the extinguishing of electric arc and improving the segmentation capability of the circuit breaker, the free gas between arc extinguishing grids in the arc extinguishing chamber 3 can be conveniently and rapidly discharged into the arc striking channels 6 by arranging the partition plate 4 and the arc striking grooves 5 at one end of the arc extinguishing chamber 3, the reignition phenomenon of the electric arc is avoided, and finally, the free gas in the two arc striking grooves 5 is discharged into the exhaust groove 7 and then discharged to the outside of the outer shell 1 through the exhaust groove 7, thereby avoiding the over-high temperature in the outer shell 1 and influencing the arc extinguishing effect of the circuit breaker.

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 runner for a circuit breaker, comprising: an outer casing (1), characterized in that: the arc striking plate is fixedly installed inside the outer shell (1), two arc extinguishing chambers (3) are formed between the upper surface and the lower surface of the arc striking plate (2) and the outer shell (1), a partition plate (4) is arranged at one end of each arc extinguishing chamber (3), an arc striking groove (5) is formed in each partition plate (4), two arc striking channels (6) are arranged at one ends, close to the partition plates (4), of the arc extinguishing chambers (3), and the arc striking channels (6) are communicated with an exhaust groove (7) formed in the outer shell (1) in an integrated mode.

2. The arc runner of a circuit breaker according to claim 1, wherein: the arc striking device is characterized in that the outer shell (1) and the arc striking plate (2) are divided into two isolated parts by the arc striking channel (6), the arc striking channel (6) is formed between one side of the arc extinguishing chamber (3) far away from the partition plate (4) and the inner wall of the arc striking plate (2), and the arc striking channel (6) is L-shaped.

3. The arc runner of a circuit breaker according to claim 1, wherein: the air outlets of the two arc ignition channels (6) are respectively positioned at different ends of one side of the upper surface and the lower surface of the arc ignition plate (2).

4. The arc runner of a circuit breaker according to claim 1, wherein: the arc striking groove (5) is a plurality of, a plurality of the arc striking groove (5) is parallel with the gap in the arc extinguishing chamber (3) before the arc extinguishing grid plate, and the arc striking groove (5) is communicated with the arc extinguishing chamber (3) and the arc striking channel (6).

5. The arc runner of a circuit breaker according to claim 1, wherein: the exhaust groove (7) is L-shaped, the air outlets of the two arc ignition channels (6) are communicated with the exhaust groove (7), and one end, far away from the arc ignition channel (6), of the exhaust groove (7) is communicated with the outside of the outer shell (1).