CN205406307U - High voltage load switch touches sword - Google Patents
High voltage load switch touches sword Download PDFInfo
- Publication number
- CN205406307U CN205406307U CN201620165584.2U CN201620165584U CN205406307U CN 205406307 U CN205406307 U CN 205406307U CN 201620165584 U CN201620165584 U CN 201620165584U CN 205406307 U CN205406307 U CN 205406307U
- Authority
- CN
- China
- Prior art keywords
- contact
- contact knife
- knife body
- high voltage
- load switch
- 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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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a high voltage load switch touches sword, including touching sword body, its characterized in that: touching sword body one end and seting up the pressure equalizing groove along touching sword body length direction, the symmetry of touching on the sword body plane of pressure equalizing groove both sides is equipped with two contacts, and the contact is along the waist type bump structure powder metallurgy sintering who touches sword body length direction and connects on touching the sword body, powder metallurgy sintering connects copper -tungsten alloy striking contact on touching the terminal surface of sword body one end.
Description
Technical field
This utility model relates to high voltage load switch, specifically a kind of high voltage load switch contact knife.
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 high voltage load switch contact knife of service life and usage safety performance.
The technical solution of the utility model is: a kind of high voltage load switch contact knife, including contact knife body, it is characterized in that: pressure equalizing tank is offered along contact knife body length direction in described contact knife body one end, the contact knife body plane of pressure equalizing tank both sides is arranged with two contacts, contact in being connected on contact knife body along the waist type bump structure in contact knife body length direction is powder metallurgy sintered, powder metallurgy sintered connection copper-tungsten striking contact on the end face of described contact knife body one end.
Further, described copper-tungsten striking contact is extended structure sintering integrated with contact knife body.
Further, described contact is copper-tungsten.
Adopting above technical scheme, the beneficial effects of the utility model are: contact and contact knife body are integrated sintering structure, not easy to crack, and the striking contact on contact knife body adopts copper-tungsten, ablation high temperature resistant, resistance to, and electrical and thermal conductivity performance is good, rapid heat dissipation；Pressure equalizing tank is coordinated to make contact knife pressure stress balance, two will be caused to get an electric shock owing to deforming contact is not gone up because of contact knife deformation, contact adopts to be arranged along contact knife body direction, at contact knife along the contact area adding contact knife when being perpendicular to body direction rotary opening and closing, improve on-load switch dynamic and thermal stability performance；Striking contact disjunctor, at contact knife body head, adopts copper-tungsten to improve the resistance to burning ability of contact knife, improves high voltage load and cut-offs load current ability, improve on-load switch and earthed switch short circuit making capability and close number of times, increasing the service life, reduces use cost.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
In figure: contact knife body 1, pressure equalizing tank 2, gets an electric shock 3, striking contact 4.
Detailed description of the invention
It is described further below in conjunction with drawings and Examples.
Shown in Fig. 1: a kind of high voltage load switch contact knife includes contact knife body 1, pressure equalizing tank 2 is offered along contact knife body 1 length direction in contact knife body one end, contact knife body 1 plane of pressure equalizing tank 2 both sides is arranged with two contacts 3, contact in being connected on contact knife body along the waist type bump structure in contact knife body length direction is powder metallurgy sintered, powder metallurgy sintered connection copper-tungsten striking contact 4 on the end face of contact knife body one end.Copper-tungsten striking contact is extended structure sintering integrated with contact knife body.Contact is copper-tungsten.
Claims (3)
1. a high voltage load switch contact knife, including contact knife body, it is characterized in that: pressure equalizing tank is offered along contact knife body length direction in described contact knife body one end, the contact knife body plane of pressure equalizing tank both sides is arranged with two contacts, contact in being connected on contact knife body along the waist type bump structure in contact knife body length direction is powder metallurgy sintered, powder metallurgy sintered connection copper-tungsten striking contact on the end face of described contact knife body one end.
2. a kind of high voltage load switch contact knife according to claim 1, is characterized in that: described copper-tungsten striking contact is extended structure sintering integrated with contact knife body.
3. a kind of high voltage load switch contact knife according to claim 1, is characterized in that: described contact is copper-tungsten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620165584.2U CN205406307U (en) | 2016-03-04 | 2016-03-04 | High voltage load switch touches sword |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620165584.2U CN205406307U (en) | 2016-03-04 | 2016-03-04 | High voltage load switch touches sword |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205406307U true CN205406307U (en) | 2016-07-27 |
Family
ID=56444592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620165584.2U Expired - Fee Related CN205406307U (en) | 2016-03-04 | 2016-03-04 | High voltage load switch touches sword |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205406307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767490A (en) * | 2019-11-08 | 2020-02-07 | 许继集团有限公司 | Moving end knife switch and knife switch type load switch |
-
2016
- 2016-03-04 CN CN201620165584.2U patent/CN205406307U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767490A (en) * | 2019-11-08 | 2020-02-07 | 许继集团有限公司 | Moving end knife switch and knife switch type load switch |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20190304 |