CN212182260U

CN212182260U - Zero-arcing arc extinguish chamber for residual current circuit breaker

Info

Publication number: CN212182260U
Application number: CN202021378987.8U
Authority: CN
Inventors: 叶子豪
Original assignee: Jiangsu Beichen Electrical Equipment Co ltd
Current assignee: Jiangsu Beichen Electrical Equipment Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2020-12-18
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses a zero arcing arc extinguish chamber for a residual current circuit breaker, which comprises a sealing cover, a contact group and an arc extinguish chamber, wherein the contact group is arranged in the sealing cover, the sealing cover is connected with the arc extinguish chamber in parallel, a partition plate is arranged at the joint of the sealing cover and the arc extinguish chamber, an air guide hole is arranged below the partition plate and is connected with a one-way valve, and an air generating block is arranged on the inner wall of the sealing cover and is opposite to the air guide hole; be equipped with a plurality of arc extinguishing blocks of parallel connection in the explosion chamber, adjacent arc extinguishing block lateral wall level is equipped with leads the arc hole and makes a plurality of arc extinguishing blocks connect relatively through leading the arc hole, is equipped with the arc layer in the arc extinguishing block and spirals crooked and both sides from the bottom to the center and all is equipped with a plurality of arc pieces, and the level interlude has a plurality of arc extinguishing plates in the clearance on arc layer. The utility model discloses simple structure, the dependable performance, the arc flight journey is long and the arc extinguishing is effectual, contact group long service life.

Description

Zero-arcing arc extinguish chamber for residual current circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to residual current circuit breaker is with zero arcing explosion chamber.

Background

A residual current circuit breaker is a mechanical switching device for switching on, carrying and breaking a circuit under normal operating conditions, and is used to prevent a fire hazard caused by the generation of a ground fault current due to insulation damage of equipment, and to distribute electric power and protect lines and power equipment from overload and short circuits. When the residual current exceeds a specified value, the moving contact and the static contact are quickly disconnected, electric arcs are generated in the disconnection process, high temperature is carried, ionization is generated in the circuit breaker, a large amount of metal ions are generated and fly out of the circuit breaker along with the electric arcs, and the phenomena of short circuit, burning and the like of peripheral circuits can be caused.

In the prior art, in order to avoid electric arc overflow, an arc extinguish chamber is usually arranged in a circuit breaker, an arc striking sheet is arranged in the arc extinguish chamber to attract electric arc, a plurality of layers of arc extinguish plates separate the electric arc into small electric arc and move along with the electric arc to realize arc extinction, but the arc extinguish effect and the high-temperature heat dissipation effect are poor, partial electric arc can be ejected out of the arc extinguish chamber at high temperature, and the practical service life of a moving contact and a static contact is influenced; or the arc-isolating cover is arranged on the outer side of the rest circuit breakers, but the whole circuit breaker is overlarge in volume and inconvenient to install in a limited space.

Disclosure of Invention

In order to solve the above problem, the utility model aims at providing a zero arcing explosion chamber for residual current circuit breaker produces the gas through producing the gas piece and accelerates the electric arc through speed, sets up oval annular striking layer extension electric arc circulation route, improves the arc extinguishing effect and finally realizes zero arcing.

The utility model adopts the technical proposal that:

a zero arcing arc extinguish chamber for a residual current circuit breaker comprises a sealing cover, a contact group and an arc extinguish chamber, wherein the contact group is arranged in the sealing cover, the sealing cover is connected with the arc extinguish chamber in parallel, a partition plate is arranged at the joint of the sealing cover and the arc extinguish chamber, an air guide hole is formed below the partition plate and is connected with a one-way valve, and an air generating block is arranged on the inner wall of the sealing cover and opposite to the air guide hole; be equipped with a plurality of arc extinguishing blocks of parallel connection in the explosion chamber, adjacent arc extinguishing block lateral wall level is equipped with leads the arc hole and makes a plurality of arc extinguishing blocks connect relatively through leading the arc hole, is equipped with the arc layer in the arc extinguishing block and spirals crooked and both sides from the bottom to the center and all is equipped with a plurality of arc pieces, and the level interlude has a plurality of arc extinguishing plates in the clearance on arc layer.

Preferentially, the cross section of the arc striking layer is in an elliptical ring shape, the bottom of the side wall of the arc extinguishing block is provided with a through hole, the through hole of the middle arc extinguishing block is communicated with the one-way valve, and the through holes of the arc extinguishing blocks at two sides are far away from one side of the partition plate towards the arc extinguishing chamber.

Preferably, the side wall of the middle arc extinguishing block is attached to the partition plate, so that a closed space is formed between the arc striking layer and the partition plate.

Preferably, the number of arc extinguishing blocks is three, which lengthens the flow path of the arc.

Preferably, the arc-shaped blocks between adjacent layers are staggered.

Preferentially, a plurality of filtering holes are uniformly formed in the arc-extinguishing plate, and the filtering holes are all arranged with the arc-shaped blocks on the upper side of the arc-extinguishing plate along the same vertical axis.

Preferably, the two sides of the arc-extinguishing plate are provided with the insertion blocks oppositely and are connected with the inner wall of the arc-extinguishing block in an insertion way.

Preferably, one side of the arc extinguish chamber, which is far away from the partition plate, is provided with a plurality of heat dissipation holes, and the distance between the adjacent heat dissipation holes which are in the same horizontal line with the air guide hole is smaller than that between the heat dissipation holes on the upper part.

Preferably, the gas generating block is made of a high-molecular gas generating material, so that a large amount of gas is generated at high temperature, the pressure in the sealing cover is rapidly increased, and the gas carrying arc enters the arc extinguishing chamber through the gas guide hole to be extinguished, so as to protect the contact group.

The utility model has the advantages that:

1. the gas generating block generates gas at high temperature after the electric arc is generated, the gas pressure in the sealing cover is rapidly increased, the one-way valve is jacked open by carrying the electric arc and metal ions through the gas guide hole to enter the arc leading layer, the electric arc passing time is accelerated, the contact group is cooled, and the service life of the movable and static contacts is prolonged;

2. three arc extinguishing piece parallel connection and inside are equipped with the arc layer that gives out light, and circulate to both sides arc extinguishing piece from the arc guiding hole behind the middle part arc extinguishing piece, and extension electric arc circulation route just increases arc extinguishing effect and cooling effect, realizes zero flashover after passing through from both sides arc extinguishing piece.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the arc extinguishing block connection of the present invention;

FIG. 3 is a schematic diagram of the two-sided arc extinguishing block structure of the present invention;

fig. 4 is a side view of the arc extinguishing block of the present invention;

figure 5 is a side view of the arc plate of the present invention.

Labeled as: 1. the gas generating device comprises a sealing cover, 11 baffle plates, 111 gas guide holes, 112 one-way valves, 113 gas generating blocks, 2 contact groups, 3 arc extinguishing chambers, 31 heat dissipation holes, 4 arc extinguishing blocks, 41 arc guide holes, 42 arc ignition layers, 421 arc blocks, 43 arc extinguishing plates, 431 filter holes, 432 plug-in blocks and 44 through holes.

Detailed Description

As shown in fig. 1, a zero arcing arc-extinguishing chamber 3 for a residual current circuit breaker comprises a sealing cover 1, a contact group 2 and an arc-extinguishing chamber 3, wherein the contact group 2 is arranged in the sealing cover 1, the sealing cover 1 is connected with the arc-extinguishing chamber 3 in parallel, a connecting part of the sealing cover 1 and the arc-extinguishing chamber 3 is provided with a partition plate 11, an air guide hole 111 is arranged below the partition plate 11 and is connected with a one-way valve 112, an air generating block 113 is arranged on the inner wall of the sealing cover 1 and is opposite to the air guide hole 111, the air generating block 113 is made of a high-molecular air generating material, so that a large amount of air is generated at high temperature, the pressure in the sealing cover 1 is rapidly increased, an electric arc and metal ions enter the arc-extinguishing;

as shown in fig. 1-4, three arc extinguishing blocks 4 connected in parallel are arranged in an arc extinguishing chamber 3, the side walls of the adjacent arc extinguishing blocks 4 are horizontally provided with arc guiding holes 41, and the three arc extinguishing blocks 4 are oppositely connected through the arc guiding holes 41, that is, both sides of the middle arc extinguishing block 4 are provided with the arc guiding holes 41, while only one side of the arc extinguishing blocks 4 at both sides close to the middle arc extinguishing block 4 is provided with the arc guiding hole 41, an arc guiding layer 42 is arranged in the arc extinguishing block 4, the cross section of the arc guiding layer is elliptical and is spirally bent from the bottom to the center, both sides of the arc guiding layer are provided with a plurality of arc blocks 421 and are protruded towards an arc extinguishing plate 43, the arc blocks 421 between the adjacent layers are staggered, the bottom of the side wall of the arc guiding layer 42 is provided with through holes 44, the through holes 44 of the middle arc extinguishing block 4 are communicated with a one-way valve 112, and the side wall is attached to the partition plate 11, so;

as shown in fig. 1 and 5, a plurality of arc extinguishing plates 43 are horizontally inserted into the gap of the arc striking layer 42, a plurality of filtering holes 431 are uniformly formed in the arc extinguishing plates 43 and are all set up with the arc blocks 421 on the upper sides of the arc extinguishing plates 43 along the same vertical axis, insertion blocks 432 are oppositely arranged on both sides of the arc extinguishing plates 43 and are all inserted and connected with the inner walls of the arc extinguishing blocks 4, a plurality of heat dissipation holes 31 are formed in one side of the arc extinguishing chamber 3, which is far away from the partition plate 11, and the distance between each adjacent heat dissipation hole 31 and the air guide hole 111 on the same horizontal line is smaller than that between the;

as shown in fig. 1-5, the arc enters the middle arc extinguishing block 4 after passing through the check valve 112 and enters the two side arc extinguishing blocks 4 from the arc guiding hole 41 around the arc striking layer 42, the arc striking is performed on the arc striking block 421, the arc is cut off by the arc extinguishing plates 43, the cut-off of the arc is realized by the multi-layer arc extinguishing plates 43, zero flashover is realized after the arc is led out from the through holes 44 at the bottom of the two side arc extinguishing blocks 4, and the heat is rapidly dissipated through the heat dissipating holes 31, so that the arc extinguishing effect is prevented from being influenced by the overhigh temperature in the arc extinguishing chamber 3, and the breaking capacity of the.

The utility model has the advantages that: the structure is simple, the performance is reliable, the arc-extinguishing path is long, the arc-extinguishing effect is good, and the service life of the contact group is long.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a residual current circuit breaker is with zero arcing explosion chamber, includes sealed cowling, contact group and explosion chamber, and the contact group is located in the sealed cowling, and the sealed cowling is connected side by side with the explosion chamber and the junction is equipped with baffle, its characterized in that: an air guide hole is arranged below the partition plate and is connected with a one-way valve, and an air generating block is arranged on the inner wall of the sealing cover and opposite to the air guide hole; be equipped with a plurality of arc extinguishing blocks of parallel connection in the explosion chamber, adjacent arc extinguishing block lateral wall level is equipped with leads the arc hole and makes a plurality of arc extinguishing blocks connect relatively through leading the arc hole, is equipped with the arc layer in the arc extinguishing block and spirals crooked and both sides from the bottom to the center and all is equipped with a plurality of arc pieces, and the level interlude has a plurality of arc extinguishing plates in the clearance on arc layer.

2. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: the section of the arc striking layer is oval and the bottom of the side wall of the arc extinguishing block is provided with a through hole, the through hole of the middle arc extinguishing block is communicated with the one-way valve, and the through holes of the arc extinguishing blocks at two sides face the arc extinguishing chamber and are far away from one side of the partition plate.

3. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: the side wall of the middle arc extinguishing block is attached to the partition plate, so that a closed space is formed between the arc striking layer and the partition plate.

4. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: the number of the arc extinguishing blocks is three.

5. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: the arc blocks between adjacent layers are arranged in a staggered mode.

6. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: a plurality of filter holes are uniformly arranged on the arc-extinguishing plate and are all arranged with the arc-shaped block on the upper side of the arc-extinguishing plate along the same vertical axis.

7. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: the two sides of the arc-extinguishing plate are oppositely provided with inserting blocks and are connected with the inner wall of the arc-extinguishing block in an inserting way.

8. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: one side of the arc extinguish chamber, which is far away from the baffle plate, is provided with a plurality of heat dissipation holes, and the distance between the adjacent heat dissipation holes which are in the same horizontal line with the air guide hole is smaller than that between the heat dissipation holes on the upper part.

9. Zero arcing arc chute for residual current circuit breakers according to claim 1, characterized in that: the gas generating block is made of high-molecular gas generating material.