CN105261512A - Electric contact device for knife switch and preparation method of electric contact device - Google Patents
Electric contact device for knife switch and preparation method of electric contact device Download PDFInfo
- Publication number
- CN105261512A CN105261512A CN201510808042.2A CN201510808042A CN105261512A CN 105261512 A CN105261512 A CN 105261512A CN 201510808042 A CN201510808042 A CN 201510808042A CN 105261512 A CN105261512 A CN 105261512A
- Authority
- CN
- China
- Prior art keywords
- contact
- knife switch
- moving contact
- strutting piece
- preparation
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/06—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier
Abstract
The invention discloses an electric contact device for a knife switch and a preparation method of the electric contact device. The device comprises a fixed contact and a moving contact assembly, wherein the moving contact assembly is matched with the fixed contact; the fixed contact and the moving contact assembly are located on a wire holder; the moving contact assembly comprises a moving contact and a support part; the support part is connected with the moving contact; the support part is prepared by a Cu/Fe/Cu composite strip; Cu layers are arranged at two sides of the support part; and the Cu layer at the single side occupies 5%-30% of total thickness of the Cu/Fe/Cu composite strip. The support part of the contact is prepared by the material with a Cu/Fe/Cu structure, so that the contact strength and the contact stability of the moving contact and the fixed contact are improved; the current conduction stability in a contact of the electrical contact is ensured; the amount of copper is greatly reduced; and the production cost is saved.
Description
Technical field
The present invention relates to a kind of contact device, specifically, what relate to is a kind of knife switch contact device and preparation method thereof.
Background technology
Knife switch is one of separation or the common equipment dropping into load in current power circuit, and its Main Function is: (1) insulating power supply, can circuit and equipment carry out maintenance of equipment maintenance or change fuse safely; (2) disjunction load, as the load below joint weldment rated current infrequently or the motor directly starting low capacity.Knife switch generally includes base, handle, moving contact, moving contact rack, fixed contact, junction block and protective cover.Knife switch is agreed with mutually with the fixed contact on base (or separation) by moving contact, thus connect (or disjunction) circuit.At present, knife switch is pressed, static contact structure is mainly divided into two large classes: the first kind, moving contact-cutter holder, stationary contact head and blade, as shown in Figure 1; Equations of The Second Kind, moving contact-blade, fixed contact-cutter holder, as shown in Figure 2.
Through retrieval, the research or the report that relate to knife switch contact material are both at home and abroad few.Current knife switch uses fine copper to prepare material as dynamic and static contact usually, the electrical and thermal conductivity of fine copper is better, but when there being big current to flow through for a long time, contact will generate heat, and intensity is low under fine copper high temperature, easy softening transform, and more difficult recovery after distortion, make the dynamic and static contact under "on" position bad, increase contact resistance, knife switch is generated heat, affects the performance of knife switch, even can produce electric spark or be burnt.In addition, pure copper material is expensive, makes the production cost of knife switch relatively high.
How not reduce the prerequisite decline low production cost of knife switch contact material performance, improving one of focus, Important Problems that knife switch contact material has become research at present useful life simultaneously.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind ofly have that intensity is high, stable performance, knife switch contact material with low cost and preparation method thereof, and then greatly improve knife switch folding performance and useful life.
For realizing above-mentioned technical purpose, the present invention by the following technical solutions:
The invention provides a kind of knife switch contact device, the moving contact component comprising fixed contact and match with described fixed contact, described fixed contact, moving contact component are positioned on junction block; The strutting piece that described moving contact component comprises moving contact, is connected with moving contact, described strutting piece adopts the preparation of Cu/Fe/Cu composite strip, and strutting piece both sides are Cu layer, and one-sided Cu layer thickness accounts for the 5%-30% of Cu/Fe/Cu composite strip gross thickness.
Preferably, described junction block adopts the preparation of Cu/Fe/Cu composite strip, and junction block both sides are Cu layer, and one-sided Cu layer thickness accounts for the 5%-30% of Cu/Fe/Cu composite strip gross thickness.
More preferably, described moving contact, fixed contact are welded on junction block prepared by Cu/Fe/Cu composite strip.
Preferably, described Cu/Fe/Cu composite strip, adopts Cu band, Fe band, Cu to be with three layers to be compounded to form, or adopts Fe to plate the preparation of Cu method.
More preferably, in described Cu/Fe/Cu composite strip, Cu layer is pure Cu layer or Cu alloy-layer.
Preferably, described moving contact is fixed on described strutting piece by parcel or mosaic mode.
More preferably, described moving contact, fixed contact adopt pure Cu or Cu reasonable offer.
The present invention also provides a kind of preparation method of above-mentioned knife switch contact device, comprises the following steps:
S1, is rolled Cu/Fe/Cu material strip, and after rolling, material strip thickness is 1.5-12mm;
S2, heat-treats the Cu/Fe/Cu material strip after rolling;
S3, carries out punching by the Cu/Fe/Cu material strip after S2 process, prepares moving contact strutting piece, and the junction block be connected with dynamic and static contact, and the shape that punching shape needs according to different knife switch is determined;
S4, adopts pure Cu or Cu alloy material strip to prepare moving contact, fixed contact respectively;
S5, is fixed on the strutting piece of described S3 by moving contact in S4 by parcel or mosaic mode;
S6, is welded in fixed contact in strutting piece, S4 in S5 on the junction block of S3.
In described S3, heat treatment refers to: heat treatment temperature is between 300 DEG C ~ 800 DEG C, heat treatment time 2h ~ 8h, and atmosphere is H
2or N
2.
In described S6, welding manner can be electric resistance welding or induction welding.
Compared with prior art, the present invention has the following advantages:
1, strutting piece of the present invention adopts the preparation of Cu/Fe/Cu compound material strip, strutting piece both sides are Cu layer, good current lead-through can be realized, middle Fe layer effectively improves the intensity of strutting piece, ensure that and keep enough contacts between dynamic and static contact, avoid the distortion of contact, heating and damage, thus the combination property of contact material is improved.
2, the present invention adopts Cu/Fe/Cu material strip to replace pure copper for contact supporter and junction block, the use amount of copper reduces about 70-90%, has that processing cost is low, preparation process is easy to control, of low pollution, constant product quality, can realize the features such as suitability for industrialized production.
3, the present invention adopts Cu or Cu alloy as contact material, because Cu has excellent electrical and thermal conductivity performance and abrasion resistance properties, thus is reduced in the wearing and tearing of the contact material caused in knife switch moving process, extends the useful life of moving contact and fixed contact.
Accompanying drawing explanation
Fig. 1-Fig. 2 is the first knife switch contact device partial schematic diagram of the present invention;
Fig. 3 is the first knife switch contact device overall schematic of the present invention;
Fig. 4 is knife switch contact device overall schematic of the present invention;
In figure: 1 and 6,2 be respectively dynamic and static contact junction block, 3 is fixed contact, and 4 is strutting piece, and 5 is moving contact, and 101 is Cu layer, and 102 is Fe layer.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Embodiment one
For preparation as Fig. 1-3 shape knife switch:
As Figure 1-3, in figure: 1 and 6,2 be respectively dynamic and static contact junction block, 3 is fixed contact, and 4 is strutting piece, and 5 is moving contact.A kind of knife switch contact device, comprises fixed contact 3, and the moving contact component matched with described fixed contact 3, and described fixed contact 3 is positioned on junction block 3, described moving contact component is positioned on junction block 1,6; The strutting piece 4 that described moving contact component comprises moving contact 5, is connected with moving contact 5; Described strutting piece 4 adopts Cu/Fe/Cu composite strip to prepare, and strutting piece 4 both sides are Cu layer, and one-sided Cu layer thickness accounts for the 5%-30% of Cu/Fe/Cu composite strip gross thickness.
Described junction block 1,6,2 adopts the preparation of Cu/Fe/Cu composite strip, and junction block both sides are Cu layer, and one-sided Cu layer thickness accounts for the 5%-30% of Cu/Fe/Cu composite strip gross thickness.
Described Cu/Fe/Cu material strip, both sides are Cu layer, and centre is Fe layer, Cu band, Fe band, Cu can be adopted to be with three layers of compounds preparation, Fe also can be adopted to plate the preparation of Cu method.
In described Cu/Fe/Cu composite strip, Cu layer is pure Cu layer or Cu alloy-layer.
Described moving contact is fixed on described strutting piece by parcel or mosaic mode.
Described dynamic and static contact adopts pure Cu or Cu reasonable offer.
The preparation method of above-mentioned knife switch contact device is as follows:
The first step: be with Fe by Cu band and carry out cold compound, preparation Cu/Fe/Cu material, wherein material strip width is 250mm, and material strip thickness is 6.0mm, and wherein one-sided copper layer thickness percentage is about 20%.
Second step: be rolled by Cu/Fe/Cu material, the thickness after rolling is 2.0mm.
3rd step: heat-treated by Cu/Fe/Cu material strip, temperature 300 DEG C, time 8h, atmosphere is N
2.
4th step: the Cu/Fe/Cu material strip after rolling is carried out punching, prepares moving contact strutting piece, and the junction block be connected with dynamic and static contact, as shown in Figure 1.
5th step: adopt pure Cu material strip to prepare moving contact, fixed contact respectively.
6th step: adopt the pure Cu moving contact of parcel mode to be fixed on the strutting piece of the 4th step acquisition.
7th step: be welded in the 4th step on Cu/Fe/Cu junction block by induction welding by fixed contact in the strutting piece in the 6th step, the 5th step, solder adopts Cu parent metal.
8th step: cleaning.
The present embodiment is finally to obtain better performances, the cheap Cu/Fe/Cu band for strutting piece and junction block, wherein, strutting piece and junction block intensity improve, weight saving, be only conventional pure Cu strutting piece 93% weight, the knife switch life-span improves 10% than traditional pure Cu knife switch life-span.
Embodiment two
For preparation as Fig. 1-3 shape knife switch, specific constructive form is see described in embodiment one.
The preparation method of above-mentioned knife switch contact device is as follows:
The first step: be with Fe by Cu band and carry out cold compound, preparation Cu/Fe/Cu material, wherein material strip width is 200mm, and material strip thickness is 10.0mm, and wherein one-sided copper layer thickness percentage is about 30%.
Second step: be rolled by Cu/Fe/Cu material, the thickness after rolling is 6.0mm.
3rd step: heat-treated by Cu/Fe/Cu material strip, temperature 500 DEG C, time 5h, atmosphere is N
2.
4th step: the Cu/Fe/Cu material strip after rolling is carried out punching, prepares moving contact strutting piece, and the junction block be connected with dynamic and static contact, as shown in Figure 1.
5th step: adopt pure Cu material strip to prepare moving contact, fixed contact respectively.
6th step: adopt parcel mode to be fixed on by pure Cu moving contact on the strutting piece of the 4th step acquisition.
7th step: be welded in the 4th step on Cu/Fe/Cu junction block by induction welding by fixed contact in the strutting piece in the 6th step, the 5th step, solder adopts Cu parent metal.
8th step: cleaning.
The present embodiment is finally to obtain better performances, the cheap Cu/Fe/Cu band for strutting piece and junction block, wherein, strutting piece and junction block intensity improve, weight saving, be only conventional pure Cu strutting piece 95% weight, the knife switch life-span improves 5% than traditional pure Cu knife switch life-span.
Embodiment three
For preparation as Fig. 4 shape knife switch:
Structure shown in Fig. 4, be with the difference of structure shown in Fig. 3: moving contact component is one chip, when knife switch is in closure state, moving contact component is between two panels fixed contact, and moving contact shown in Fig. 2 is two-piece type, when knife switch is for closure state, fixed contact is between two panels moving contact component.
Shown in above-mentioned Fig. 4, the preparation method of knife switch contact device is as follows:
The first step: adopt complex method to prepare Cu/Fe/Cu material, wherein expect that wide is 150mm, material strip thickness is 15.0mm, and wherein each copper layer thickness percentage is about 5%.
Second step: be rolled by Cu/Fe/Cu material, the thickness after rolling is 10mm.
3rd step: heat-treated by Cu/Fe/Cu material strip, treatment temperature is 800 DEG C, and the time is 4h, and atmosphere is H
2.
4th step: material strip after rolling is carried out punching, prepares moving contact strutting piece, and the junction block be connected with dynamic and static contact, as shown in Figure 4.
5th step: adopt CuNi10 material strip to prepare moving contact, fixed contact respectively.
6th step: CuNi10 moving contact is embedded on the strutting piece of the 4th step acquisition.
7th step: adopt Resistance Welding to be connected in the 4th step on Cu/Fe/Cu junction block fixed contact in the strutting piece in the 6th step, the 5th step, solder is Cu parent metal.
8th step: cleaning.
The present embodiment finally obtains better performances, the cheap Cu/Fe/Cu band for strutting piece and junction block is example, and wherein, strutting piece intensity improves, and weight saving, is only conventional 90% weight, and the knife switch life-span improves 15% than traditional pure Cu knife switch life-span.
Method by preparing contact supporter and junction block at Cu/Fe/Cu composite strip provided by the invention, be applicable to the knife switch electricity consumption contact supporter of all and the preparation of junction block, the method reduces production cost by reducing copper content while maintenance makes the performance of electrical contact product fine, have that processing cost is low, preparation process is easy to control, of low pollution, constant product quality, to equipment without particular/special requirement.
The foregoing is only section Example of the present invention, not do any restriction to technical scope of the present invention, all any amendments made within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a knife switch contact device, the moving contact component comprising fixed contact and match with described fixed contact, described fixed contact, moving contact component are positioned on junction block; It is characterized in that: the strutting piece that described moving contact component comprises moving contact, is connected with moving contact, described strutting piece adopts the preparation of Cu/Fe/Cu composite strip, and strutting piece both sides are Cu layer, and one-sided Cu layer thickness accounts for the 5%-30% of Cu/Fe/Cu composite strip gross thickness.
2. knife switch contact device according to claim 1, is characterized in that: described junction block adopts the preparation of Cu/Fe/Cu composite strip, and junction block both sides are Cu layer, and one-sided Cu layer thickness accounts for the 5%-30% of Cu/Fe/Cu composite strip gross thickness.
3. knife switch contact device according to claim 2, is characterized in that: described moving contact, fixed contact are welded on junction block prepared by Cu/Fe/Cu composite strip.
4. knife switch contact device according to claim 1, is characterized in that: described Cu/Fe/Cu composite strip is Cu band, Fe band, Cu are with three layers to be compounded to form, or adopts Fe plating Cu to prepare.
5. knife switch contact device according to claim 4, is characterized in that: in described Cu/Fe/Cu composite strip, Cu layer is pure Cu layer or Cu alloy-layer.
6. the knife switch contact device according to any one of claim 1-5, is characterized in that: described moving contact is fixed on described strutting piece by parcel or mosaic mode.
7. the knife switch contact device according to any one of claim 1-5, is characterized in that: described moving contact, fixed contact adopt pure Cu or Cu reasonable offer.
8. a preparation method for the knife switch contact device described in any one of claim 1-7, is characterized in that: comprise the steps:
S1, is rolled Cu/Fe/Cu material strip, and after rolling, material strip thickness is 1.5-12mm;
S2, heat-treats the Cu/Fe/Cu material strip after rolling;
S3, carries out punching by the Cu/Fe/Cu material strip after S2 process, prepares moving contact strutting piece, and the junction block be connected with dynamic and static contact, and the shape that punching shape needs according to different knife switch is determined;
S4, adopts pure Cu or Cu alloy material strip to prepare moving contact, fixed contact respectively;
S5, is fixed on the strutting piece of described S3 by moving contact in S4 by parcel or mosaic mode;
S6, is welded in the fixed contact in strutting piece, S4 in S5 on the junction block of S3.
9. the preparation method of knife switch contact device according to claim 8, is characterized in that: in described S3, heat treatment refers to: heat treatment temperature is between 300 DEG C ~ 800 DEG C, heat treatment time 2h ~ 10h, and atmosphere is H
2or N
2.
10. the preparation method of knife switch contact device as claimed in claim 8 or 9, it is characterized in that, in described S6, welding manner is electric resistance welding or induction welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808042.2A CN105261512A (en) | 2015-11-20 | 2015-11-20 | Electric contact device for knife switch and preparation method of electric contact device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808042.2A CN105261512A (en) | 2015-11-20 | 2015-11-20 | Electric contact device for knife switch and preparation method of electric contact device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105261512A true CN105261512A (en) | 2016-01-20 |
Family
ID=55101152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510808042.2A Pending CN105261512A (en) | 2015-11-20 | 2015-11-20 | Electric contact device for knife switch and preparation method of electric contact device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105261512A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735556A (en) * | 2018-06-27 | 2018-11-02 | 西安西电开关电气有限公司 | The manufacturing method and resistance contact head of resistance contact head |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188237Y (en) * | 1993-12-09 | 1995-01-25 | 中南工学院 | Knife switch with strengthened elastic contact conductor element |
| CN101217074A (en) * | 2008-01-14 | 2008-07-09 | 中希合金有限公司 | A silver tin/copper oxide compound electrical contact and preparation method |
| CN201681727U (en) * | 2010-03-31 | 2010-12-22 | 东莞市中一合金科技有限公司 | Copper-iron-copper triple-layer alloy strip |
| CN202758799U (en) * | 2012-08-01 | 2013-02-27 | 厦门协成实业有限公司 | Isolation switch |
| DE102012106053A1 (en) * | 2012-07-05 | 2014-01-09 | Doduco Gmbh | Electromechanical low-voltage switch |
| CN103681079A (en) * | 2013-12-22 | 2014-03-26 | 广西和谐电力科技有限公司 | High-voltage isolating switch |
| CN205104412U (en) * | 2015-11-20 | 2016-03-23 | 温州新科特种材料有限公司 | Knife -like switch electricity contact means |
-
2015
- 2015-11-20 CN CN201510808042.2A patent/CN105261512A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188237Y (en) * | 1993-12-09 | 1995-01-25 | 中南工学院 | Knife switch with strengthened elastic contact conductor element |
| CN101217074A (en) * | 2008-01-14 | 2008-07-09 | 中希合金有限公司 | A silver tin/copper oxide compound electrical contact and preparation method |
| CN201681727U (en) * | 2010-03-31 | 2010-12-22 | 东莞市中一合金科技有限公司 | Copper-iron-copper triple-layer alloy strip |
| DE102012106053A1 (en) * | 2012-07-05 | 2014-01-09 | Doduco Gmbh | Electromechanical low-voltage switch |
| CN202758799U (en) * | 2012-08-01 | 2013-02-27 | 厦门协成实业有限公司 | Isolation switch |
| CN103681079A (en) * | 2013-12-22 | 2014-03-26 | 广西和谐电力科技有限公司 | High-voltage isolating switch |
| CN205104412U (en) * | 2015-11-20 | 2016-03-23 | 温州新科特种材料有限公司 | Knife -like switch electricity contact means |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735556A (en) * | 2018-06-27 | 2018-11-02 | 西安西电开关电气有限公司 | The manufacturing method and resistance contact head of resistance contact head |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105483641A (en) | Preparing method of copper-base electric contact material enhanced by in-situ grown graphene | |
| CN205104412U (en) | Knife -like switch electricity contact means | |
| KR200497070Y1 (en) | Layered structure support | |
| CN105261512A (en) | Electric contact device for knife switch and preparation method of electric contact device | |
| CN105489410A (en) | Cu-Al composite material, small breaker coil block and preparation method thereof | |
| CN105161380A (en) | Circuit breaker electrical contact support member and preparation method thereof | |
| CN102709072A (en) | Copper-aluminum composite bus of current-carrying conductor of medium-voltage isolation switch and preparation method thereof | |
| CN205081078U (en) | Circuit breaker electrical contact support piece | |
| CN202268181U (en) | L-shaped copper bar | |
| CN202178204U (en) | Contact device for vacuum switch | |
| CN205230854U (en) | A contact material for circuit breaker | |
| CN201975317U (en) | Copper aluminum composite bar for current-carrying conductor of medium-voltage isolating switch | |
| CN204825067U (en) | Adopt novel aluminium electroloysis positive pole steel claw of super cross -section welded | |
| CN201829360U (en) | Silver-tungsten oxide composite contact | |
| CN203288268U (en) | Copper aluminum alloy composite bar | |
| CN202564064U (en) | Irregular-shaped composite contact of rivet | |
| CN205050822U (en) | Diode | |
| CN202871730U (en) | Rapid fuse for protection of high-capacity rectifying device | |
| CN205230864U (en) | Compound material of copper - aluminium and miniature circuit breaker coil pack | |
| CN203931982U (en) | A kind of contact system of circuit breaker | |
| CN202736773U (en) | Radiating electric contact | |
| CN201252156Y (en) | Conductive electrode of sintering press | |
| CN202585143U (en) | Special-shaped rivet composite contact | |
| CN204550734U (en) | The coupling device of a kind of graphite anode and busbar | |
| CN2914259Y (en) | Non-conventional type line for industry distribution circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170707 Address after: Wenzhou Oujiang Estuary in Zhejiang province 325026 industrial agglomeration area in Wenzhou City, Ou Jin Road No. 5600 Applicant after: Wenzhou Hongfeng Electrical Alloy Co., Ltd. Address before: 325000, No. 8, No. 1633, Binhai Road, Longwan District, Zhejiang, Wenzhou, China Applicant before: WENZHOU XINKE SPECIAL MATERIAL CO., LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160120 |