CN108172429B - A kind of structure of contact terminal with air-sweeping type arc extinguishing structure - Google Patents
A kind of structure of contact terminal with air-sweeping type arc extinguishing structure Download PDFInfo
- Publication number
- CN108172429B CN108172429B CN201711395780.4A CN201711395780A CN108172429B CN 108172429 B CN108172429 B CN 108172429B CN 201711395780 A CN201711395780 A CN 201711395780A CN 108172429 B CN108172429 B CN 108172429B
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- China
- Prior art keywords
- contact
- sheet metal
- arc
- elastic sheet
- nozzle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The present invention relates to a kind of structure of contact terminals with air-sweeping type arc extinguishing structure, the structure of contact terminal includes fixed lower contact assembly, the upper contact head component that can be moved relative to lower contact assembly and the arc-chutes that two contact assembly front ends are arranged in, the front end of the lower contact assembly is equipped with static contact, the front end of the upper contact head component is equipped with moving contact, the rear of the static contact and moving contact is equipped with insufflation unit, after static contact and moving contact separate, insufflation unit is blown forward, and the electric arc of generation is blown into arc-chutes.Compared with prior art, air is blown the surface in moving contact and static contact, electric arc is blown into arc-chutes, played the function of extinguishing electric arc, guarantee the safety of low-voltage electrical apparatus by the present invention by nozzle and gas storeroom while moving contact and static contact are opened.
Description
Technical field
The present invention relates to low voltage electrical apparatus technology fields, and in particular to a kind of structure of contact terminal with air-sweeping type arc extinguishing structure.
Background technique
In low voltage switch, moving contact and static contact are thrown open, and can be formed between moving contact and static contact
Electric arc is quickly introduced arc-chutes by the electric power of electric arc, electric arc, by arc extinction.But electrodynamic size is decided by disjunction electricity
The size of stream.When electric current reaches a critical value, electric power is powerless to introduce arc-chutes for electric arc, causes electric arc that can not extinguish.
It therefore, how to be the key that quickly to extinguish electric arc by electric arc introducing arc-chutes.And one of electromagnetic type arc extinguishing is unavoidable
Defect.Therefore, electric arc enters the time of arc-chutes, extremely important for improving the safety of low-voltage electrical apparatus.
Summary of the invention
Simple, safety that it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of structures
The high structure of contact terminal with air-sweeping type arc extinguishing structure of property.
The purpose of the present invention can be achieved through the following technical solutions: a kind of contact knot with air-sweeping type arc extinguishing structure
Structure, the structure of contact terminal include fixed lower contact assembly, can be mobile relative to lower contact assembly upper contact head component and setting
Arc-chutes two contact assembly front ends, the front end of the lower contact assembly are equipped with static contact, before the upper contact head component
It holds and is equipped with moving contact, the rear of the static contact and moving contact is equipped with insufflation unit, after static contact and moving contact separate, blows
Unit is blown forward, and the electric arc of generation is blown into arc-chutes, the electric arc of generation is blown into arc-chutes by blowing, to reduce
The residence time of electric arc improves the safety of low-voltage electrical apparatus.
The compressible gas storeroom that the insufflation unit includes a nozzle and is connected to nozzle rear end, when dynamic
When contact and static contact contact, the gas is stored chamber opening and is communicated with the atmosphere, described when moving contact and static contact separate
The compression of gas storeroom, and air is squeezed into nozzle, nozzle is blown forward, and the electric arc of generation is blown into arc-chutes.
The nozzle is L-shaped, and the bottom end of nozzle passes through lower contact assembly and is connected to gas storeroom.
The gas storeroom includes the elastic sheet metal that lower contact assembly bottom is arranged in by one piece and lower sets of contacts
The bottom of part surrounds, and one end of the elastic sheet metal is fixed by rivet and lower contact assembly, sets in the middle part of elastic sheet metal
There is the insulating bar for pressing down on elastic sheet metal, when static contact and moving contact contact, the following table of the upper contact head component
Face abuts with the top of insulating bar and presses down on elastic sheet metal, rotates down the loose one end of elastic sheet metal.
The loose one end of the elastic sheet metal is upturned, and the middle part of elastic sheet metal, will be elastic in level
One end of sheet metal is placed up tilting, contacts convenient for this one end with the bottom of lower contact assembly, is quickly formed more closed
Gas storage space.
The material of the elastic sheet metal is tin bronze piece, and elasticity is good for the material, remains to restore former after a number of uses
Shape, to increase the service life of structure of contact terminal.
The working principle of this structure of contact terminal is as follows:
When moving contact and static contact are closed, while moving contact and contact static contact contact, upper contact head component passes through exhausted
Edge bar is pressed down against the middle part of elastic sheet metal, according to lever principle it is found that the loose one end of elastic sheet metal is to moving down
It moves and is separated with the bottom of lower contact assembly, that is, open and open gas storage room, admit air into gas storage room, carry out gas
Pre- storage；When moving contact and static contact separate, while moving contact leaves contact static contact, upper contact head component upwards in east simultaneously
It separating with insulating bar, elastic sheet metal restores rapidly at this time, i.e., loose one end is sprung back upwards, in the process, elasticity
Sheet metal crushing failure at high speed air body stores indoor gas, sprays air quickly through nozzle, directly blows gas in dynamic touching
On the surface of head and static contact, so that the electric arc of arcing is blown into arc-chutes, extinguish electric arc.
Compared with prior art, the beneficial effects of the present invention are embodied in following several respects:
(1) by nozzle and gas storeroom, while moving contact and static contact are opened, air is blown in moving contact and
Electric arc is blown into arc-chutes by the surface of static contact, is played the function of extinguishing electric arc, is guaranteed the safety of low-voltage electrical apparatus；
(2) long service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing structure of contact terminal；
Fig. 2 is status diagram of the structure of contact terminal of the present invention when moving contact and static contact are closed；
Fig. 3 is status diagram of the structure of contact terminal of the present invention when moving contact and static contact are opened.
Wherein, 1 is upper contact head component, and 2 be moving contact, and 3 be static contact, and 4 be electric arc, and 5 be arc-chutes, and 6 store for gas
Room, 7 be elastic sheet metal, and 8 be rivet, and 9 be insulating bar, and 10 be nozzle, and 11 be lower contact assembly.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
A kind of structure of contact terminal with air-sweeping type arc extinguishing structure, structure is as shown in Figure 2 and Figure 3, including fixed lower contact
Component 11, the upper contact head component 1 that can be moved relative to lower contact assembly 11 and the arc extinguishing that two contact assembly front ends are set
Room 5, the front end of lower contact assembly 11 are equipped with static contact 3, and the front end of upper contact head component 1 is equipped with moving contact 2, static contact 3 and dynamic touching
First 2 rear is equipped with insufflation unit, and after static contact 3 and moving contact 2 separate, insufflation unit is blown forward, by the electric arc 4 of generation
Arc-chutes 5 are blown into, the electric arc 4 of generation is blown into arc-chutes 5 by blowing, to reduce the residence time of electric arc 4, is improved
The safety of low-voltage electrical apparatus.
Insufflation unit includes a nozzle 10 and the compressible gas storeroom 6 that is connected to 10 rear end of nozzle, when dynamic
When contact 2 and static contact 3 contact, gas storeroom 6 is opened and is communicated with the atmosphere, when moving contact 2 and static contact 3 separate, gas
Body storeroom 6 compresses, and air is squeezed into nozzle 10, and nozzle 10 is blown forward, and the electric arc 4 of generation is blown into arc-chutes 5.
Nozzle 10 is L-shaped, and the bottom end of nozzle 10 passes through lower contact assembly 11 and is connected to gas storeroom 6.
Gas storeroom 6 includes the elastic sheet metal 7 and lower contact assembly that lower 11 bottom of contact assembly is arranged in by one piece
11 bottom surrounds, and one end of elastic sheet metal 7 is fixed by rivet 8 and lower contact assembly 11, and the middle part of elastic sheet metal 7 is set
There is the insulating bar 9 for pressing down on elastic sheet metal 7, when static contact 3 and the contact of moving contact 2, the following table of upper contact head component 1
Face abuts with the top of insulating bar 9 and presses down on elastic sheet metal 7, turns the loose one end of elastic sheet metal 7 downwards
It is dynamic.
The loose one end of elastic sheet metal 7 is upturned, and the middle part of elastic sheet metal 7 is in level, by elastic metallic
One end of piece 7 is placed up tilting, contacts convenient for this one end with the bottom of lower contact assembly 11, is quickly formed more closed
Gas storage space, the material of elastic sheet metal 7 are tin bronze piece.
Claims (3)
1. a kind of structure of contact terminal with air-sweeping type arc extinguishing structure, which includes fixed lower contact assembly, can be opposite
In the mobile upper contact head component of lower contact assembly and the arc-chutes of two contact assembly front ends, the lower contact assembly be set
Front end be equipped with static contact, the front end of the upper contact head component is equipped with moving contact, which is characterized in that the static contact and moving contact
Rear be equipped with insufflation unit, after static contact and moving contact separate, insufflation unit is blown forward, and the electric arc of generation is blown into and is gone out
Arc chamber,
The compressible gas storeroom that the insufflation unit includes a nozzle and is connected to nozzle rear end, works as moving contact
When with static contact contact, the gas is stored chamber opening and is communicated with the atmosphere, when moving contact and static contact separate, the gas
Storeroom compression, and air is squeezed into nozzle, nozzle is blown forward, the electric arc of generation is blown into arc-chutes,
The nozzle is L-shaped, and the bottom end of nozzle passes through lower contact assembly and is connected to gas storeroom,
The gas storeroom includes the elastic sheet metal and lower contact assembly that lower contact assembly bottom is arranged in by one piece
Bottom surrounds, and one end of the elastic sheet metal is fixed by rivet and lower contact assembly, and the middle part of elastic sheet metal, which is equipped with, to be used
In the insulating bar for pressing down on elastic sheet metal, when static contact and moving contact contact, the lower surface of the upper contact head component with
The top of insulating bar abuts and presses down on elastic sheet metal, rotates down the loose one end of elastic sheet metal.
2. a kind of structure of contact terminal with air-sweeping type arc extinguishing structure according to claim 1, which is characterized in that the bullet
Property the loose one end of sheet metal be upturned, the middle part of elastic sheet metal is in level.
3. a kind of structure of contact terminal with air-sweeping type arc extinguishing structure according to claim 1, which is characterized in that the elasticity
The material of sheet metal is tin bronze piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711395780.4A CN108172429B (en) | 2017-12-21 | 2017-12-21 | A kind of structure of contact terminal with air-sweeping type arc extinguishing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711395780.4A CN108172429B (en) | 2017-12-21 | 2017-12-21 | A kind of structure of contact terminal with air-sweeping type arc extinguishing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108172429A CN108172429A (en) | 2018-06-15 |
| CN108172429B true CN108172429B (en) | 2019-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711395780.4A Active CN108172429B (en) | 2017-12-21 | 2017-12-21 | A kind of structure of contact terminal with air-sweeping type arc extinguishing structure |
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| Country | Link |
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| CN (1) | CN108172429B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911192A (en) * | 2019-12-18 | 2020-03-24 | 柏仕海 | Electric power grading arc extinguishing device based on Bernoulli principle |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8611282U1 (en) * | 1986-04-24 | 1986-06-26 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arcing chamber of a circuit breaker |
| CN2110920U (en) * | 1991-10-10 | 1992-07-22 | 袁淼 | Isolating switch special for electric brake of water-wheel type generator |
| CN1234145C (en) * | 2004-04-19 | 2005-12-28 | 西安交通大学 | Low voltage current-limiting breaker based on forced air explusion |
| CN101615536B (en) * | 2009-08-06 | 2014-07-09 | 乐清市牵引机电厂 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
| CN103730277A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Gas arc extinguishing chamber |
| CN103730289A (en) * | 2013-12-20 | 2014-04-16 | 吴江市东泰电力特种开关有限公司 | Sulfur hexafluoride gas arc extinguishing switching device |
| CN204927114U (en) * | 2015-07-14 | 2015-12-30 | 曹先泽 | Power switch |
| CN205487977U (en) * | 2016-01-11 | 2016-08-17 | 贵州长征电器成套有限公司 | Novel middling pressure circuit breaker |
| CN205487902U (en) * | 2016-02-05 | 2016-08-17 | 永鸥电气有限公司 | Load switch of gas -insulated looped netowrk cabinet |
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2017
- 2017-12-21 CN CN201711395780.4A patent/CN108172429B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108172429A (en) | 2018-06-15 |
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