CN205406306U - Copper -tungsten alloy static contact - Google Patents
Copper -tungsten alloy static contact Download PDFInfo
- Publication number
- CN205406306U CN205406306U CN201620165580.4U CN201620165580U CN205406306U CN 205406306 U CN205406306 U CN 205406306U CN 201620165580 U CN201620165580 U CN 201620165580U CN 205406306 U CN205406306 U CN 205406306U
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- CN
- China
- Prior art keywords
- copper
- static contact
- tungsten
- contact
- side plate
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a copper -tungsten alloy static contact, its characterized in that: including copper static contact seat and copper tungsten [alloy] contact, copper static contact seat's side is connected with the curb plate of bending, and the mounting hole is seted up to the edge of bending on the curb plate of bending, and copper static contact seat goes up powder metallurgy sintering and connects copper tungsten [alloy] contact.
Description
Technical field
This utility model relates to high voltage load switch device, specifically a kind of copper-tungsten static contact.
Background technology
In switching off process, due to the motion of moving contact, making the contact surface between dynamic and static contact constantly reduce, electric current density just constantly increases, and contact resistance is just increasing with the reduction of contact surface, thus contact temperature raises, and produces thermionic emission.When contact just separates, owing to the gap between dynamic and static contact is minimum, the electric field intensity of appearance is significantly high, and under electric field action, metal surface electronics constantly flies from metal surface to overflow, and becomes free electron and moves between contact, and this phenomenon is called field emission.The free electron that thermionic emission, field emission produce accelerates to fly to anode under electric field force effect, constantly collides neutral, collide out again by the electronics in neutral in way, and this phenomenon is called ionization by impact.Due to the chain reaction of ionization by impact, free electron increases exponentially, and substantial amounts of electronics marches on towards anode, and substantial amounts of cation moves to negative pole, and switch contact gap has just become the passage of electric current, and between contact gap, medium is breakdown is formed for electric arc.The generation of electric arc easily burn human body, damage appliance circuit, there is bigger use potential safety hazard.
Summary of the invention
The problem producing electric arc for prior art breaker in middle, this utility model provides a kind of simple in construction, can be effectively improved switch and cut-off load-bearing capacity, improve the copper-tungsten static contact of service life and usage safety performance.
The technical solution of the utility model is: a kind of copper-tungsten static contact, it is characterized in that: include copper static contact seat and copper-tungsten contact, the side of copper static contact seat is connected to bending side plate, the upper bending edges of bending side plate is offered installing hole, powder metallurgy sintered connection copper-tungsten contact on copper static contact seat.
Further, the side plate of described bending side plate connection static contact seat is provided with symmetrically arranged two countersunk screw holes centered by contact.
The utility model has the advantages that: the side of static contact seat is connected to bending side plate, play linkage function by the upper bending edges of side plate and side plate, it is not necessary to traditional L-shaped connects logical row and connects static contact, has saved copper material, reduces use cost, reduces loop resistance simultaneously；Powder metallurgy sintered connection copper-tungsten contact on copper static contact seat, it is firm to connect, and copper-tungsten contact is high temperature resistant, arc ablation resistance, electrical and thermal conductivity performance is good, rapid heat dissipation, being used in on-load switch when cut-offfing with making current, the electric arc that separating brake moment produces is unlikely to be burnt contact, improves high voltage load and cut-offs load current ability, service life, security performance.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation；
Fig. 2 is Fig. 1 left view.
In figure: copper static contact seat 1, copper-tungsten contact 2, bending side plate 3, upper bending edges 31, side plate 32, installing hole 4, countersunk screw holes 5.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1, shown in 2: a kind of copper-tungsten static contact includes copper static contact seat 1 and copper-tungsten contact 2, the side of copper static contact seat 1 is connected to bending side plate 3, offering installing hole 4 on the upper bending edges 31 of bending side plate 3, bending side plate 3 connects the side plate 32 of copper static contact seat and is provided with symmetrically arranged two countersunk screw holes 5 centered by contact.Powder metallurgy sintered connection copper-tungsten contact 2 on copper static contact seat 1.
Claims (2)
1. a copper-tungsten static contact, it is characterized in that: include copper static contact seat and copper-tungsten contact, the side of copper static contact seat is connected to bending side plate, and the upper bending edges of bending side plate is offered installing hole, powder metallurgy sintered connection copper-tungsten contact on copper static contact seat.
2. a kind of copper-tungsten static contact according to claim 1, is characterized in that: described bending side plate connects the side plate of copper static contact seat and is provided with symmetrically arranged two countersunk screw holes centered by copper-tungsten contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620165580.4U CN205406306U (en) | 2016-03-04 | 2016-03-04 | Copper -tungsten alloy static contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620165580.4U CN205406306U (en) | 2016-03-04 | 2016-03-04 | Copper -tungsten alloy static contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205406306U true CN205406306U (en) | 2016-07-27 |
Family
ID=56443772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620165580.4U Expired - Fee Related CN205406306U (en) | 2016-03-04 | 2016-03-04 | Copper -tungsten alloy static contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205406306U (en) |
-
2016
- 2016-03-04 CN CN201620165580.4U patent/CN205406306U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160727 Termination date: 20190304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |