CN201478203U - Arc-extinguishing system of AC contactor - Google Patents
Arc-extinguishing system of AC contactor Download PDFInfo
- Publication number
- CN201478203U CN201478203U CN2009201621973U CN200920162197U CN201478203U CN 201478203 U CN201478203 U CN 201478203U CN 2009201621973 U CN2009201621973 U CN 2009201621973U CN 200920162197 U CN200920162197 U CN 200920162197U CN 201478203 U CN201478203 U CN 201478203U
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- arc
- magnetic conductive
- conductive board
- fixed contact
- extinguishing
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Abstract
The utility model relates to an arc-extinguishing system of an alternating current (AC) contactor, comprising a moving contact, a fixed contact and an arc extinguish chamber, wherein the arc extinguish chamber comprises an arc-extinguishing cover, and three arc-extinguishing grid pieces fixedly arranged on the arc-extinguishing cover; the basic shapes of the arc-extinguishing grid pieces are straight line plate shapes which are vertically arranged; the arc-extinguishing cover is also fixed with an arc guide grid piece with a basic shape of L shape; the arc guide grid piece and the three arc-extinguishing grid pieces are arranged at the left side end of the fixed contact and sequentially positioned along the direction with shorter and shorter distance apart from the fixed contact; the arc guide grid piece comprises a an arc-extinguishing part parallel to the arc-extinguishing grid pieces, and an arc guide part vertical to the arc-extinguishing grid pieces; and the arc guide part is positioned just under the arc-extinguishing grid pieces. The arc-extinguishing system has the advantages that electric arc can be better guided to move towards the arc extinguish chamber, so that the flashover distance is shortened, the arc-extinguishing effect is improved, and the electric service life is prolonged.
Description
Technical field
The utility model belongs to low-voltage electrical apparatus structure-design technique field, is specifically related to a kind of arc quenching system of A.C. contactor.
Background technology
The topmost performance index of A.C. contactor are electric lifes, and the arc quenching effect of the length of electric life and arc quenching system has direct relation.What traditional contactor used is ceramic dielectric longitudinal joint arc extinguishing structure, and its shortcoming is to need to fall to hold under 660V, AC-3 or AC-4 use classes to use, otherwise contactor can not use.
Chinese patent literature CN2636392Y discloses the A.C. contactor that a kind of rated operational current is 40A, form by electromagnetic system, contact and arc quenching system, auxiliary contact and shell, contact and arc quenching system comprise moving contact, fixed contact and arc control device, its design feature is: arc control device are distributed in the housing of being made by arc resistant plastic by two kinds of ferromagnetic grid sheets of variform length and short ferromagnetic grid sheet and constitute, long ferromagnetic grid sheet and short ferromagnetic grid sheet upper end all have breach, and the gusset piece termination of moving contact is drawn and led arc angle.The main pilot arc of the ferromagnetic grid sheet of described length also promptly moves towards the direction of short ferromagnetic grid sheet towards arc control device, but because the ferromagnetic grid sheet of length of this kind A.C. contactor and short ferromagnetic grid sheet are linearity and are the setting that is arranged in parallel, and the ferromagnetic grid sheet of described length is arranged on the outside of short ferromagnetic grid sheet, also promptly away from a side of fixed core, and exceed short ferromagnetic grid sheet, so the ferromagnetic grid sheet of this length has been guided electric arc into self rather than has been lacked ferromagnetic grid sheet morely, in that the electric arc guiding is not ideal to the effect of arc chamber.
Chinese patent literature CN2636398Y discloses the A.C. contactor that a kind of rated operational current is 630A, by electromagnetic system, contact and arc quenching system, auxiliary contact and shell are formed, contact and arc quenching system comprise moving contact, fixed contact and arc control device, its design feature is: arc control device are distributed in the housing of being made by arc resistant plastic by ferromagnetic grid sheet and constitute, ferromagnetic grid sheet upper end has breach, moving contact is got an electric shock by welding silver alloy on the fine copper gusset piece and constitutes, fine copper gusset piece termination is drawn ferromagnetic material and is led arc angle, the fine copper gusset piece contacts with a ferromagnetic spring leaf, setting-in U sections core in the fixed contact, U sections core are drawn 90 degree magnetic conduction angles.The main pilot arc in this kind A.C. contactor 90 degree magnetic conduction angle also promptly moves towards the direction of short ferromagnetic grid sheet towards arc control device, but because the arc guide part and the short ferromagnetic grid sheet at 90 degree magnetic conduction angles of this kind A.C. contactor are linearity and are the setting that is arranged in parallel, and described 90 degree magnetic conduction angles are arranged on the outside of short ferromagnetic grid sheet, also promptly away from a side of fixed core, and exceed short ferromagnetic grid sheet, so this 90 degree magnetic conduction angle has been guided electric arc into self rather than has been lacked ferromagnetic grid sheet, in that the electric arc guiding is also not ideal to the effect of arc chamber morely.
The A.C. contactor of above-mentioned two patent disclosures has better arc quenching effect though compare with the conventional AC contactor, still exists the weak point that flashover distance is long, arc quenching effect is not good enough, electric life is short.
The utility model content
The purpose of this utility model provides a kind of pilot arc preferably and moves towards arc control device, thereby shortens flashover distance, improves arc quenching effect and prolong the A.C. contactor arc quenching system of electric life.
The technical scheme that realizes the utility model purpose is: a kind of A.C. contactor arc quenching system, comprise moving contact, fixed contact and arc control device, described arc control device comprise arc-extinguish chamber and are fixedly installed on three arc extinguishing grid pieces on the described arc-extinguish chamber that the basic configuration of described each arc extinguishing grid pieces is that vertically disposed straight line is tabular; It is characterized in that: also be fixed with a basic configuration on the described arc-extinguish chamber and be the L shaped arc grid sheet of leading; Describedly lead the left-hand end that arc grid sheet and three arc extinguishing grid pieces are arranged on fixed contact, and along the described fixed contact of distance from setting gradually as far as near direction; The described arc grid sheet of leading comprises arc extinguishing portion parallel with described arc extinguishing grid pieces and the arc guide part vertical with described arc extinguishing grid pieces, described arc guide part be positioned at described arc extinguishing grid pieces under.
In the technique scheme, the top of described moving contact is provided with moving contact, and the bottom of described fixed contact is provided with fixed contact; The bottom of described arc extinguishing grid pieces and the bottom of described moving contact are on the same horizontal line; The described residing level height in arc guide part of leading arc grid sheet is positioned under the described fixed contact.
In the technique scheme, the basic configuration of described fixed contact is a U-shaped, and the basic configuration of described moving contact is L shaped.
In the technique scheme, described moving contact comprises horizontally disposed base portion and extends upward the arc guide part of formation from described base portion end; Described base portion and described arc guide part are formed L shaped.
In the technique scheme, this arc quenching system also comprises a magnetic conductive component; Described fixed contact surrounds a horizontal direction setting and opening U-lag left; Described magnetic conductive component is fixed in the U-lag.
In the technique scheme, described magnetic conductive component comprises first magnetic conductive board that vertically is provided with and is positioned at described U-lag left side, link to each other with described first magnetic conductive board and be against second magnetic conductive board on the described U-lag bottom side edge wall, vertically be provided with and link to each other with second magnetic conductive board and be positioned at the 3rd magnetic conductive board of described U-lag, link to each other with the 3rd magnetic conductive board and be against the 4th magnetic conductive board on the wall of limit on the described U-lag; Described second magnetic conductive board and the 4th magnetic conductive board compress mutually, thereby make described magnetic conductive component be fixed in the described U-lag.
In the technique scheme, the bottom of described the 4th magnetic conductive board is provided with a projection that protrudes down; The part of described second magnetic conductive board is bent upwards, and form an elastic leaf springs, and described elastic leaf springs is pressed on the described projection.
The utlity model has positive effect:
(1) the utility model has improved the arc quenching system in the A.C. contactor in the prior art, has used the arc resistant plastic shell to add the arc extinguishing structure of ferromagnetic grid sheet.When moving contact and fixed contact disjunction, the field drives electric arc that utilizes the dynamic/static contact streaming current to produce shifts the arc guide part (being also referred to as contact bridge) of electric arc guide arc grid sheet and fixed contact.Because it is the L shaped arc grid sheet of leading that the utility model is provided with basic configuration, thereby can be after arc transfer, lead arc grid sheet and fixed contact arc guide part (between magnetic field continue to drive electric arc and move to arc extinguishing grid pieces in the arc control device, electric arc is eliminated in disjunction cooling effect with arc extinguishing grid pieces, the arc heating gas of discharging by the hot gas tap only contains the small-amount free electronics, compared with prior art, the novel pilot arc preferably of this use moves towards arc control device, thereby shortens flashover distance, improves arc quenching effect and prolong electric life.
(2) the utility model can effectively improve the electric property of A.C. contactor, if traditional contactor adopts the utility model as arc quenching system, under 660V, AC-3 or AC-4 use classes, no longer need to fall to hold and use, can also improve the electric life under AC-3 and the AC-4 use classes simultaneously greatly.
(3) in the utility model, also comprise a magnetic conductive component that is fixed in the U-lag.When principal current produces magnetic flux and passes through magnetic conductive component by fixed contact, in the contact gap, form magnetic field, when the circuit breaker disjunction, produce electric arc in the contact gap, electric arc self also produces a magnetic field, this magnetic field is at the electric arc upside, it is opposite with the magnetic direction that fixed contact and magnetic conductive component produce, and at the electric arc downside, it is identical with the magnetic direction that fixed contact and magnetic conductive component produce, like this, the resultant flux of both sides is just unequal, therefore downside, produces strong electromagnetic force greater than upside, electric arc is upwards promoted, and electric arc is entered in the arc control device that arc extinguishing grid pieces forms rapidly, and move until the path that enters arc control device at last to control electric arc preferably, preferably electric arc is blown fast to arc control device; Electric arc is elongated and is subjected to the disjunction of arc extinguishing grid pieces and cools off and very fast being extinguished; Thereby shorten flashover distance to the arc control device, effectively improve the advantage of arc quenching effect so the utlity model has preferably electric arc to be blown fast.In addition, the utility model is to utilize the arc extinguishing of arc current own, thereby arc current is big more, and arc blow-out is also just strong more, and arc quenching effect is good more, thereby is very effective for the breaking capacity that improves circuit breaker.
(4) in the utility model, the bottom of described the 4th magnetic conductive board is provided with a projection that protrudes down; The part of described second magnetic conductive board is bent upwards, and form an elastic leaf springs, and described elastic leaf springs is pressed on the described projection.Utilize the elasticity of elastic leaf springs, second magnetic conductive board and the 4th magnetic conductive board can be pushed against respectively on the limit wall of the both sides up and down of U-lag, also promptly utilize magnetic conductive component self can be fixed in the U-lag, need not to use securing member, its fitting operation is comparatively convenient, has also reduced cost to a certain extent.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.Be labeled as shown in the accompanying drawing:
Moving contact 1, moving contact 11, base portion 12, arc guide part 13, fixed contact 2, fixed contact 21, U-lag 22, arc control device 3, arc-extinguish chamber 4, arc extinguishing grid pieces 5 is led arc grid sheet 6, arc extinguishing portion 61, arc guide part 62, magnetic conductive component 7, first magnetic conductive board, 71, the second magnetic conductive boards, 72, the three magnetic conductive boards 73, the 4th magnetic conductive board 74, projection 75, elastic leaf springs 76.
Embodiment
(embodiment 1)
Fig. 1 is a kind of structural representation of the present utility model, has shown a kind of embodiment of the present utility model.
Present embodiment is a kind of A.C. contactor arc quenching system, sees Fig. 1, comprises moving contact 1, fixed contact 2, arc control device 3 and magnetic conductive component 7; , described arc control device 3 comprise arc-extinguish chamber 4 and are fixedly installed on three arc extinguishing grid pieces 5 on the described arc-extinguish chamber 4 that the basic configuration of described each arc extinguishing grid pieces 5 is that vertically disposed straight line is tabular; Also be fixed with a basic configuration on the described arc-extinguish chamber 4 and be the L shaped arc grid sheet 6 of leading; Describedly lead the left-hand end that arc grid sheet 6 and three arc extinguishing grid pieces 5 are arranged on fixed contact 2, and along the described fixed contact 2 of distance from setting gradually as far as near direction; The described arc grid sheet 6 of leading comprises arc extinguishing portion 61 parallel with described arc extinguishing grid pieces 5 and the arc guide part 62 vertical with described arc extinguishing grid pieces 5, described arc guide part 62 be positioned at described arc extinguishing grid pieces 5 under.The basic configuration of described fixed contact 2 is U-shapeds, and the basic configuration of described moving contact 1 is L shaped.
Described moving contact 1 comprises horizontally disposed base portion 12 and extends upward the arc guide part 13 of formation from described base portion 12 ends; Described base portion 12 and described arc guide part 13 are formed L shaped.
The top of described moving contact 1 is provided with moving contact 11, and the bottom of described fixed contact 2 is provided with fixed contact 21; The bottom of the bottom of described arc extinguishing grid pieces 5 and described moving contact 11 is on the same horizontal line; The described arc guide part 62 residing level heights of leading arc grid sheet 6 are positioned under the described fixed contact 21.
Described fixed contact 2 surrounds a horizontal direction setting and opening U-lag 22 left; Described magnetic conductive component 7 is fixed in the U-lag 22.
Described magnetic conductive component 7 comprises first magnetic conductive board 71 that vertically is provided with and is positioned at described U-lag 22 left sides, link to each other with described first magnetic conductive board 71 and be against second magnetic conductive board 72 on the described U-lag 22 bottom side edge walls, vertically be provided with and link to each other with second magnetic conductive board 72 and be positioned at the 3rd magnetic conductive board 73 of described U-lag 22, link to each other with the 3rd magnetic conductive board 73 and be against the 4th magnetic conductive board 74 on the wall of limit, described U-lag 22 upper end; Described second magnetic conductive board 72 and the 4th magnetic conductive board 74 compress mutually, thereby make described magnetic conductive component 7 be fixed in the described U-lag 22.
The bottom of described the 4th magnetic conductive board 74 is provided with a projection 75 that protrudes down; The part of described second magnetic conductive board 72 is bent upwards, and form an elastic leaf springs 76, and described elastic leaf springs 76 is pressed on the described projection 75.
Present embodiment has the following advantages:
(1) present embodiment has improved the arc quenching system in the A.C. contactor in the prior art, has used the arc resistant plastic shell to add the arc extinguishing structure of ferromagnetic grid sheet.When moving contact and fixed contact disjunction, the field drives electric arc that utilizes the dynamic/static contact streaming current to produce shifts the arc guide part (being also referred to as contact bridge) of electric arc guide arc grid sheet and fixed contact.Because it is the L shaped arc grid sheet of leading that present embodiment is provided with basic configuration, thereby can be after arc transfer, lead arc grid sheet and fixed contact arc guide part (between magnetic field continue to drive electric arc and move to arc extinguishing grid pieces in the arc control device, electric arc is eliminated in disjunction cooling effect with arc extinguishing grid pieces, the arc heating gas of discharging by the hot gas tap only contains the small-amount free electronics, compared with prior art, the novel pilot arc preferably of this use moves towards arc control device, thereby shortens flashover distance, improves arc quenching effect and prolong electric life.
(2) present embodiment can effectively improve the electric property of A.C. contactor, if traditional contactor adopts present embodiment as arc quenching system, under 660V, AC-3 or AC-4 use classes, no longer need to fall to hold and use, can also improve the electric life under AC-3 and the AC-4 use classes simultaneously greatly.
(3) in the present embodiment, also comprise a magnetic conductive component that is fixed in the U-lag.When principal current produces magnetic flux and passes through magnetic conductive component by fixed contact, in the contact gap, form magnetic field, when the circuit breaker disjunction, produce electric arc in the contact gap, electric arc self also produces a magnetic field, this magnetic field is at the electric arc upside, it is opposite with the magnetic direction that fixed contact and magnetic conductive component produce, and at the electric arc downside, it is identical with the magnetic direction that fixed contact and magnetic conductive component produce, like this, the resultant flux of both sides is just unequal, therefore downside, produces strong electromagnetic force greater than upside, electric arc is upwards promoted, and electric arc is entered in the arc control device that arc extinguishing grid pieces forms rapidly, and move until the path that enters arc control device at last to control electric arc preferably, preferably electric arc is blown fast to arc control device; Electric arc is elongated and is subjected to the disjunction of arc extinguishing grid pieces and cools off and very fast being extinguished; Thereby shorten flashover distance to the arc control device, effectively improve the advantage of arc quenching effect so present embodiment has preferably electric arc to be blown fast.In addition, present embodiment is to utilize the arc extinguishing of arc current own, thereby arc current is big more, and arc blow-out is also just strong more, and arc quenching effect is good more, thereby is very effective for the breaking capacity that improves circuit breaker.
(4) in the present embodiment, the bottom of described the 4th magnetic conductive board is provided with a projection that protrudes down; The part of described second magnetic conductive board is bent upwards, and form an elastic leaf springs, and described elastic leaf springs is pressed on the described projection.Utilize the elasticity of elastic leaf springs, second magnetic conductive board and the 4th magnetic conductive board can be pushed against respectively on the limit wall of the both sides up and down of U-lag, also promptly utilize magnetic conductive component self can be fixed in the U-lag, need not to use securing member, its fitting operation is comparatively convenient, has also reduced cost to a certain extent.
Obviously, the foregoing description of the present utility model only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (7)
1. A.C. contactor arc quenching system, comprise moving contact (1), fixed contact (2) and arc control device (3), described arc control device (3) comprise arc-extinguish chamber (4) and are fixedly installed on three arc extinguishing grid pieces (5) on the described arc-extinguish chamber (4) that the basic configuration of described each arc extinguishing grid pieces (5) is that vertically disposed straight line is tabular; It is characterized in that: also be fixed with a basic configuration on the described arc-extinguish chamber (4) and be the L shaped arc grid sheet (6) of leading; Describedly lead the left-hand end that arc grid sheet (6) and three arc extinguishing grid pieces (5) are arranged on fixed contact (2), and along the described fixed contact of distance (2) from setting gradually as far as near direction; The described arc grid sheet (6) of leading comprises arc extinguishing portion (61) parallel with described arc extinguishing grid pieces (5) and the arc guide part (62) vertical with described arc extinguishing grid pieces (5), described arc guide part (62) be positioned at described arc extinguishing grid pieces (5) under.
2. A.C. contactor arc quenching system according to claim 1 is characterized in that: the top of described moving contact (1) is provided with moving contact (11), and the bottom of described fixed contact (2) is provided with fixed contact (21); The bottom of the bottom of described arc extinguishing grid pieces (5) and described moving contact (11) is on the same horizontal line; The described residing level height in arc guide part (62) of leading arc grid sheet (6) is positioned under the described fixed contact (21).
3. A.C. contactor arc quenching system according to claim 1 is characterized in that: the basic configuration of described fixed contact (2) is a U-shaped, and the basic configuration of described moving contact (1) is L shaped.
4. A.C. contactor arc quenching system according to claim 3 is characterized in that: described moving contact (1) comprises horizontally disposed base portion (12) and extends upward the arc guide part (13) of formation from described base portion (12) end; Described base portion (12) and described arc guide part (13) are formed L shaped.
5. A.C. contactor arc quenching system according to claim 3 is characterized in that: this arc quenching system also comprises a magnetic conductive component (7); Described fixed contact (2) surrounds a horizontal direction setting and opening U-lag (22) left; Described magnetic conductive component (7) is fixed in the U-lag (22).
6. A.C. contactor arc quenching system according to claim 5, it is characterized in that: described magnetic conductive component (7) comprises first magnetic conductive board (71) that vertically is provided with and is positioned at described U-lag (22) left side, link to each other with described first magnetic conductive board (71) and be against second magnetic conductive board (72) on described U-lag (22) the bottom side edge wall, vertically be provided with, and link to each other with second magnetic conductive board (72), and be positioned at the 3rd magnetic conductive board (73) of described U-lag (22), link to each other with the 3rd magnetic conductive board (73) and be against the 4th magnetic conductive board (74) on the wall of limit, described U-lag (22) upper end; Described second magnetic conductive board (72) and the 4th magnetic conductive board (74) compress mutually, thereby make described magnetic conductive component (7) be fixed in the described U-lag (22).
7. A.C. contactor arc quenching system according to claim 6 is characterized in that: the bottom of described the 4th magnetic conductive board (74) is provided with a projection (75) that protrudes down; The part of described second magnetic conductive board (72) is bent upwards, and form an elastic leaf springs (76), and described elastic leaf springs (76) is pressed on the described projection (75).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201621973U CN201478203U (en) | 2009-07-02 | 2009-07-02 | Arc-extinguishing system of AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201621973U CN201478203U (en) | 2009-07-02 | 2009-07-02 | Arc-extinguishing system of AC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201478203U true CN201478203U (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201621973U Expired - Fee Related CN201478203U (en) | 2009-07-02 | 2009-07-02 | Arc-extinguishing system of AC contactor |
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| CN (1) | CN201478203U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057602A (en) * | 2016-08-10 | 2016-10-26 | 李蕊名 | Structure apparatus capable of improving contact breaking capacity |
| CN106098438A (en) * | 2016-08-10 | 2016-11-09 | 李蕊名 | One has high breaking capacity arc quenching system |
| CN108269709A (en) * | 2017-01-03 | 2018-07-10 | 浙江正泰电器股份有限公司 | The arc-chutes of breaker |
| CN108417450A (en) * | 2018-04-28 | 2018-08-17 | 天津京人电器有限公司 | Single-break direct-acting contactor |
| CN109616345A (en) * | 2018-12-31 | 2019-04-12 | 雷顿电气科技有限公司 | The pedestal general assembly of electric switch |
| CN115274374A (en) * | 2022-06-13 | 2022-11-01 | 华通机电股份有限公司 | Kilovolt-level intelligent alternating current plastic shell circuit breaker |
-
2009
- 2009-07-02 CN CN2009201621973U patent/CN201478203U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057602A (en) * | 2016-08-10 | 2016-10-26 | 李蕊名 | Structure apparatus capable of improving contact breaking capacity |
| CN106098438A (en) * | 2016-08-10 | 2016-11-09 | 李蕊名 | One has high breaking capacity arc quenching system |
| CN106057602B (en) * | 2016-08-10 | 2018-05-15 | 李蕊名 | A kind of constructional device for improving contact breaking capacity |
| CN106098438B (en) * | 2016-08-10 | 2018-05-22 | 李蕊名 | One kind has high breaking capacity arc quenching system |
| CN108269709A (en) * | 2017-01-03 | 2018-07-10 | 浙江正泰电器股份有限公司 | The arc-chutes of breaker |
| CN108417450A (en) * | 2018-04-28 | 2018-08-17 | 天津京人电器有限公司 | Single-break direct-acting contactor |
| CN109616345A (en) * | 2018-12-31 | 2019-04-12 | 雷顿电气科技有限公司 | The pedestal general assembly of electric switch |
| CN115274374A (en) * | 2022-06-13 | 2022-11-01 | 华通机电股份有限公司 | Kilovolt-level intelligent alternating current plastic shell circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20140702 |
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| EXPY | Termination of patent right or utility model |