CN102201303A - Contact apparatus - Google Patents
Contact apparatus Download PDFInfo
- Publication number
- CN102201303A CN102201303A CN2010101309438A CN201010130943A CN102201303A CN 102201303 A CN102201303 A CN 102201303A CN 2010101309438 A CN2010101309438 A CN 2010101309438A CN 201010130943 A CN201010130943 A CN 201010130943A CN 102201303 A CN102201303 A CN 102201303A
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- CN
- China
- Prior art keywords
- contact
- moving contact
- contact body
- conductive
- conductive contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000696 magnetic material Substances 0.000 claims description 7
- 230000035699 permeability Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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- Contacts (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Provided is a contact apparatus, comprising a moving contact body and a conductive contact, wherein the moving contact body has a grooved type structure and the two sidewalls of the grooved type structure extend backwards, a shaft aperture is provided on the extension and the conductive contact is connected to the moving contact body. According to the invention, an original moving contact whole body structure is altered into a combined structure of the moving contact moving contact body connecting with the conductive contact, a material having a lower resistivity than that of the contact body is adopted with the conductive contact and a magnetic conductive material having low price and high resistivity is adopted with the contact body. The advantage is the production cost is substantially reduced, because non ferrous metal is adopted in the moving contact body. Meanwhile, the moving contact body raises the self-motivated magnetizing field in an arc motion area when the contact repulses, the cooling of the arc is improved and the stagnation time of the arc at the contact is reduced and the arc extinguishing effect and breaking performance of a breaker can be improved. The moving contact body and conductive contact simultaneously bear current when the breaker is electrified, so a good conductive performance of the breaker can be guaranteed. A reduction of the performance of the breaker caused by a deformation of the moving contact can be avoided, because the intensity of the moving contact body is larger than that of the conductive contact.
Description
Technical field
The present invention relates to a kind of contact apparatus that is used for miniature circuit breaker, more specifically, relate to a kind of moving contact that is used for miniature circuit breaker, this moving contact can significantly reduce production costs, improve the breaking capacity of circuit breaker by structural improvement.
Background technology
Low-voltage circuit breaker is used to distribute electric energy as a kind of distribution apparatus that has a large capacity and a wide range in distribution and protection circuit, protection electrical power distribution network and industrial equipment are avoided the destruction of short circuit, overload, under voltage and earth fault current.Along with the transformation of development of electric power industry and urban and rural power grids, the development at aspects such as the intelligent building in city, rural urbanization construction, industrial automation controls has all proposed higher specification requirement to China's low-voltage circuit breaker.Miniature circuit breaker is most popular a kind of terminal protection electrical equipment in the architectural electricity terminal power distribution equipment.At present the direction that requires of China's small low-voltage circuit breaker forward " miniaturization, modularization, multi-functional, accessory moduleization, high breaking, low noise, reliable operation, progressively realize intelligent " develops, and the performance that for this reason improves miniature circuit breaker has become the inexorable trend of electric power development.Pursue high performance while certainty and also can bring certain negative effect, as complex structure, cost raising etc., this problem is more outstanding for the miniature circuit breaker that has a large capacity and a wide range.Therefore, how between performance and price, to find best binding site to become the common objective of enterprise and power industry development.
At present, the moving contact of general circuit breaker is and adopts the integrative-structure of copper as electric conducting material, and this mainly is conduction and good heat conductivity (being only second to silver) owing to copper, and intensity, hardness, fusing point height are easy to processing.But, how under the condition that does not reduce performance, to reduce the inexorable trend that production cost has become development because the cost of raw material goes up year by year in recent years.
Summary of the invention
Given this, the purpose of this invention is to provide a kind of trigger device that can reduce production costs, improve the circuit breaker interrupting performance, to solve the too high problem of moving contact cost in the present miniature circuit breaker.
For achieving the above object, the present invention adopts following technical scheme:
A kind of contact apparatus comprises moving contact body and conductive contact, it is characterized in that:
Described moving contact body is a trench structure, and the both sides sidewall of its grooved extends back connecting portion, has a pair of axis hole on this connecting portion;
Described conductive contact is connected on the moving contact body, and the resistivity of conductive contact is lower than the resistivity of moving contact body.
Further:
Described conductive contact is connected with the front end of described moving contact body.
The front end of described moving contact body extends tongue forward by bottom land, and described conductive contact is connected with this tongue.
Described moving contact body is a permeability magnetic material.
The front end of described conductive contact has a circular-arc projection.
Moving contact structure at present circuit breaker, the present invention changes the structure of original moving contact one into linked together by moving contact body and conductive contact fabricated structure, wherein conductive contact adopts the resistivity material low with respect to contact body, and contact body adopts price permeability magnetic material low relatively, that resistivity is high.The invention has the beneficial effects as follows:
1. owing to the material more than 80% in the dynamic contact mechanism is non-nonferrous materials, therefore saved the production cost more than 60%;
2. because the moving contact body is a permeability magnetic material, improved the self-excitation magnetic field in arc motion zone, helped to add the cooling of hard arc, reduced the dead time of electric arc, therefore can improve the arc quenching effect and the interrupting performance of circuit breaker at contact;
3. because moving contact body intensity greater than conductive contact intensity, therefore can reduce the reduction of the circuit breaker performance that causes owing to moving contact deformation.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of conductive contact among the present invention;
Fig. 3 distributes and the arc motion schematic diagram for trigger device regional magnetic field of the present invention.
Embodiment
The invention provides a kind of trigger device that can significantly reduce production costs, improve the circuit breaker interrupting performance.Technical scheme is as follows: moving contact is combined by contact body and conductive contact two parts, and wherein the moving contact body is a price non-non-ferrous metal permeability magnetic material low relatively, that resistivity is high, and conductive contact is the low metal material of resistivity.Conductive contact links together by the method and the contact body of welding or riveted joint, and is connected with coil by non-ferrous metal wire.
In this trigger device, the moving contact body is the lower non-nonferrous materials of price, accounts for integrally-builtly about 80%, therefore can save production cost over half; In addition, the resistivity of conductive contact is less than the resistivity of contact body, and when conductive contact carried most of electric current during breaker electrifying, the moving contact body was also with the bearing part electric current, and moving contact body and conductive contact play the effect of loaded current simultaneously.Therefore under the prerequisite that satisfies the ampacity requirement, can suitably reduce the sectional area of conductive contact, guarantee the circuit breaker excellent conducting performance, also can further save the production material, reduce production costs.Simultaneously, because moving contact bulk material intensity is higher than the conductive contact material, be difficult for producing distortion, the circuit breaker performance that can avoid circuit breaker to cause owing to deformation in the long period of operation process reduces.
Further, after contact is scolded out, because Huo Muli disappears on the contact, moving contact is mainly scolded out rapidly under the Lorentz force effect, and this Lorentz force is that magnetic field produces with the Interaction Law of Electric Current that flows through movable contact rod, and this power is bigger, contact scolds out speed just bigger, electric arc elongates rapidly, helps quickening the growth of arc voltage, and the magnetic field of therefore encouraging oneself plays an important role to the break performance of circuit breaker.In this trigger device, contact body is non-non-ferrous metal permeability magnetic material, can significantly strengthen the self-excitation magnetic field size of voltage contact area, increases the electric power after contact is scolded out, and this helps improving the arc quenching effect and the interrupting performance of circuit breaker.
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, 2, the present invention is a kind of trigger device, comprise moving contact body 1 and conductive contact 2, wherein: moving contact body 1 is a trench structure, the both sides sidewall of its grooved extends back connecting portion, have a pair of axis hole on this connecting portion, the moving contact body rotates as axle in circuit breaker branch, making process.Conductive contact 2 is connected with the front end of moving contact body 1 by the method for welding or riveted joint, and it is the circular-arc projection 3 of 1mm that there is a radius in the conductive contact 2 front ends outside, and fashionable this circular-arc projection of circuit breaker closing contacts with the fixed contact line.This circular-arc projection 3 has improved the contact performance of circuit breaker.The rear end of conductive contact 2 is connected with coil by a non-ferrous metal wire.
As shown in Figure 3, solid arrow is represented current direction among the figure, and on behalf of electric arc, dotted arrow be subjected to force direction, and " * ", " " are represented the inflow in magnetic field respectively and flowed out direction.After contact is scolded out, moving contact 1., 2. the magnetic field in zone helps electric arc and moves to the arc control device direction, because the moving contact body is a permeability magnetic material, can strengthen 1., 2. regional magnetic field size, therefore can promote that electric arc hightails voltage contact area, enter arc control device, and then improve the arc quenching effect and the interrupting performance of circuit breaker.
The part that conductive contact extend into body bathtub construction inside connects non-ferrous metal wire, and during closing of power circuit breaker, electric current flows to trigger device by this non-ferrous metal wire from coil.In this trigger device, the moving contact bulk volume probably accounts for 1/10 of whole trigger device volume, and the price of copper probably is more than 8 times of iron at present, therefore, can reduce the cost more than 60%; It is generally acknowledged: the resistivity of iron is 9.78 * 10
-8Ω m, specific heat are 0.46 * 10
3J/kg ℃; The resistivity of copper is 1.75 * 10
-8Ω m, specific heat are 0.39 * 10
3J/kg ℃, therefore conductive contact is born most of electric current, the moving contact body is born the fraction electric current, moving contact body and conductive contact be loaded current simultaneously, when the utensil that guaranteed to open circuit has excellent conductive performance, also can further reduce production costs by the sectional area that suitably reduces conductive contact; On the other hand because the specific heat of iron is greater than the specific heat of copper, when the circuit breaker disjunction (or by big electric current time), contact body can be rapidly with the heat absorption of conductive contact generation on contact body, further reduced the temperature rise of circuit breaker; Further, because the intensity of iron has been guaranteed that mechanism is difficult for deforming, and then has been guaranteed the important parameter of breaker contact system, as the excess of stroke, end pressure etc. greater than the intensity of copper.
In addition, in other embodiments of the invention:
Contact body and conductive contact material are not limited to iron and copper, as long as the conductive contact resistivity of material is less than the contact body material.As adopting silver, also can adopt insulating material as the contact body material as the conductive contact material;
Distance and shape that moving contact body bathtub construction is extended forward are uncertain, thereby conductive contact can be connected in contact body bathtub construction or its part of extending forward;
The connected mode of conductive contact and contact body has multiple, can rivet or weld;
The position that connects non-ferrous metal wire on the conductive contact is uncertain, as long as conductive contact both can as the main carrier of electric current.
Therefore, making various modifications at the foregoing description all belongs in the protection range of the present invention with changing.
Claims (5)
1. a contact apparatus comprises moving contact body and conductive contact, it is characterized in that:
Described moving contact body is a trench structure, and the both sides sidewall of its grooved extends back connecting portion, has a pair of axis hole on this connecting portion;
Described conductive contact is connected on the moving contact body, and the resistivity of conductive contact is lower than the resistivity of moving contact body.
2. contact apparatus as claimed in claim 1 is characterized in that:
Described conductive contact is connected with the front end of described moving contact body.
3. contact apparatus as claimed in claim 1 is characterized in that:
The front end of described moving contact body extends tongue forward by bottom land, and described conductive contact is connected with this tongue.
4. contact apparatus as claimed in claim 1 is characterized in that:
Described moving contact body is a permeability magnetic material.
5. as the described contact apparatus of one of claim 1-4, it is characterized in that:
The front end of described conductive contact has a circular-arc projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101309438A CN102201303A (en) | 2010-03-22 | 2010-03-22 | Contact apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101309438A CN102201303A (en) | 2010-03-22 | 2010-03-22 | Contact apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102201303A true CN102201303A (en) | 2011-09-28 |
Family
ID=44661900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101309438A Pending CN102201303A (en) | 2010-03-22 | 2010-03-22 | Contact apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102201303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045460A1 (en) * | 2014-09-26 | 2016-03-31 | 敬德强 | Large-current magnetic reed switch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4864261A (en) * | 1987-06-10 | 1989-09-05 | Fuji Electric Co., Ltd. | Contactor device fo circuit breaker |
| JP2001332162A (en) * | 2000-05-19 | 2001-11-30 | Fuji Electric Co Ltd | Movable contacts for circuit breakers |
| CN201130639Y (en) * | 2007-12-07 | 2008-10-08 | 厦门宏美电子有限公司 | Improved structural contactor stationary contact |
| CN201397788Y (en) * | 2009-05-08 | 2010-02-03 | 无锡唯特电气技术有限公司 | Moving contact assembly of small circuit breaker |
| CN201749789U (en) * | 2010-03-22 | 2011-02-16 | 北京翠祥电器元件有限公司 | Contact device |
-
2010
- 2010-03-22 CN CN2010101309438A patent/CN102201303A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4864261A (en) * | 1987-06-10 | 1989-09-05 | Fuji Electric Co., Ltd. | Contactor device fo circuit breaker |
| JP2001332162A (en) * | 2000-05-19 | 2001-11-30 | Fuji Electric Co Ltd | Movable contacts for circuit breakers |
| CN201130639Y (en) * | 2007-12-07 | 2008-10-08 | 厦门宏美电子有限公司 | Improved structural contactor stationary contact |
| CN201397788Y (en) * | 2009-05-08 | 2010-02-03 | 无锡唯特电气技术有限公司 | Moving contact assembly of small circuit breaker |
| CN201749789U (en) * | 2010-03-22 | 2011-02-16 | 北京翠祥电器元件有限公司 | Contact device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045460A1 (en) * | 2014-09-26 | 2016-03-31 | 敬德强 | Large-current magnetic reed switch |
| RU2692778C2 (en) * | 2014-09-26 | 2019-06-27 | Дэцян ЦЗИН | Magnetic switch for strong currents |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110928 |