CN205104428U - Disconnected vacuum interrupter of low pressure heavy current high score - Google Patents
Disconnected vacuum interrupter of low pressure heavy current high score Download PDFInfo
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- CN205104428U CN205104428U CN201520776068.9U CN201520776068U CN205104428U CN 205104428 U CN205104428 U CN 205104428U CN 201520776068 U CN201520776068 U CN 201520776068U CN 205104428 U CN205104428 U CN 205104428U
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- vacuum interrupter
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Abstract
The utility model provides a disconnected vacuum interrupter of low pressure heavy current high score, it includes quiet ring flange (1), busbar (2), static contact (3), moving contact (4), a shielding section of thick bamboo (5), insulating tube (6), bellows (7), uide bushing (8) and move conducting rod (9), its characterized in that of: the external diameter of static contact (3) and moving contact (4) is not less than insulating tube (6) external diameter. The utility model discloses change whole vacuum interrupter's structure, increase the effective space that electric arc spreads, improved the ability of cut -offfing the heavy current under the low pressure state.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, specifically just relates to a kind of vacuum interrupter of low-voltage, high-current high breaking.
Background technology
Vacuum interrupter, have another name called vacuum switch tube, it is the core component of mesohigh power switch, its Main Function is, by can blow-out suppress electric current rapidly after managing the excellent insulating properties of interior vacuum and making mesohigh circuitry cuts power supply, avoid accident and unexpected generation, be mainly used in the power transmission and distribution control system of electric power, be also applied to the distribution systems such as metallurgy, mine, oil, chemical industry, railway, broadcast, communication, industrial high-frequency heating.There is energy-conservation, material-saving, fire prevention, explosion-proof, volume is little, the life-span is long, maintenance cost is low, the feature such as reliable and pollution-free.Vacuum interrupter is divided into again arc extinguishing chamber for breaker and on-load switch arc control device purposes, and arc-extinguishing chamber of circuit breaker is mainly used in transformer station in power department and electrical network facilities, and on-load switch arc control device are mainly used in the terminal use of electrical network.Vacuum interrupter is primarily of part composition ceramic package vacuum interrupters such as airtight insulation crust, galvanic circle, shielding harness, contact, bellowss.
Vacuum interrupter utilizes high vacuum operational insulation arc-extinguishing medium, realizes a kind of electron tube of the on-off function of power circuit by sealing a pair contact in a vacuum.When it disconnects the electric current of certain numerical value, the moment that dynamic/static contact is being separated, current constriction to contact be just separated a bit on, occur that resistance between electrode acutely increases to improve rapidly with temperature, until the evaporation of generating electrodes metal, form high electric field strength simultaneously, cause extremely strong strong transmitting and gap breakdown, produce vacuum arc, when power current close to zero time, be also simultaneously the increase of clearance between open contacts, the plasma of vacuum arc is very fast to spread to surrounding, after arc current zero passage, the medium of contact gap becomes insulator from electric conductor rapidly, so electric current is broken.Due to the special tectonic of contact, during arcing, contact gap can produce suitable longitudinal magnetic field, and this magnetic field can make electric arc be evenly distributed on contact surface, maintains low arc voltage, thus make vacuum interrupter have dielectric strength resume speed, little arc energy and little corrosion rate after higher arc.Like this, just improve ability and the useful life of vacuum interrupter drop-out current.
Above-mentioned traditional vacuum arc control device; it is the core component of mesohigh power switch; under voltage levels, there is good protective capability; but in low voltage application occasion; because its volume is large, it is not high to cut-off big current ability, is never well applied; all the time cannot substitute air type product, only have certain applications in less demanding mine anti-explosion occasion.
But vacuum interrupter little is opened distance, high electric life, without arcing, had great advantage without various features such as precious metals silvers than the air type product of low-pressure field, within the scope of little volumetric spaces, therefore how to realize large index of cut-offfing is the technical barrier making vacuum interrupter be widely used in low-pressure field needs to solve.Chinese Patent Application No. is 201410761060.5 patent discloses a kind of vacuum interrupter and use the vacuum circuit-breaker of this vacuum interrupter.Vacuum interrupter comprises porcelain shell, main shield cover and quiet cover plate, described porcelain shell is metallization porcelain shell, one end of the close quiet cover plate of main shield cover is provided with the flange of outwards turnover, together with the end of described flange is welded and fixed with porcelain shell, the bending place of the other parts relative to main shield cover of flange is welded with quiet cover plate and is fixed together.Because main shield cover welds with porcelain shell and quiet cover plate simultaneously, thus the quiet end shield that can save in existing vacuum interrupter, and then greatly can reduce vacuum interrupter size in the corresponding direction, reduce the volume of vacuum interrupter, solve the problem that volume is large, installation dimension is large that existing vacuum interrupter exists, meanwhile, the omission of quiet end shield also can reduce the production cost of vacuum interrupter.Although this technology reduces the volume of vacuum interrupter, under still cannot applying low-pressure state, cut-off the object of big current.
Utility model content
The purpose of this utility model be exactly for existing vacuum interrupter when for low-voltage circuit; cut-off big current ability not high; the technological deficiency of high accuracy open circuit protection cannot be realized in a low voltage state; a kind of vacuum interrupter of low-voltage, high-current high breaking is provided; the structure of whole vacuum interrupter is changed; increase the useful space of electric arc diffusion, improve the ability of cut-offfing big current in a low voltage state.
Technical scheme
In order to realize above-mentioned technical purpose, the utility model designs a kind of vacuum interrupter of low-voltage, high-current high breaking, it comprises quiet ring flange, busbar, fixed contact, moving contact, shielding cylinder, insulated tube, bellows, fairlead and moving conductive rod, it is characterized in that: the external diameter of described fixed contact and moving contact is not less than insulated tube external diameter.
Further, described fixed contact and moving contact are contained in shielding cylinder, shielding cylinder one end has mounted cover quiet ring flange, busbar is equipped with in quiet ring flange outer end, fixed contact right-hand member connects quiet base plate, quiet base plate stretches out quiet ring flange and is connected with busbar, moving contact is positioned on the left of fixed contact, it is connected with the right-hand member of moving conductive rod, is set with bellows outside moving conductive rod, and bellows is contained in insulated tube, insulated tube external diameter is less than shielding external diameter, the left end of moving conductive rod stretches out insulated tube, and insulated tube left end cap is equipped with left cover, and fairlead is contained in the mouth of pipe place that moving conductive rod stretches out left cover.
Further, described insulated tube is porcelain tube.
Further, described insulated tube right side and shielding cylinder left side are connected and fixed.
Further, described fairlead is sleeved on moving conductive rod.
Beneficial effect
The utility model provides a kind of vacuum interrupter of low-voltage, high-current high breaking, the structure of whole vacuum interrupter is changed, increase the effective area of contact cleverly, improve the useful space of electric arc diffusion, arc extinguishing is better, scaling loss is less, not only solve a difficult problem for specified operation product temperature rise, more solve the long-term technology difficult problem that small size can not realize large breaking capacity, high electric life again, the performance rate of low-voltage, high-current vacuum interrupter is risen to new level.
Accompanying drawing explanation
Accompanying drawing 1 is the product figure of the utility model embodiment.
Accompanying drawing 2 is structural representations of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Embodiment
As shown in figure 1 and 2, a kind of vacuum interrupter of low-voltage, high-current high breaking, it comprises quiet ring flange 1, busbar 2, fixed contact 3, moving contact 4, shielding cylinder 5, insulated tube 6, bellows 7, fairlead 8 and moving conductive rod 9, it is characterized in that: the external diameter of described fixed contact 3 and moving contact 4 is not less than insulated tube 6 external diameter.
Described fixed contact 3 and moving contact 4 are contained in shielding cylinder 5, shielding cylinder one end has mounted cover quiet ring flange 1, busbar 2 is equipped with in quiet ring flange 1 outer end, fixed contact 3 right-hand member connects quiet base plate 10, quiet base plate 10 stretches out quiet ring flange 1 and is connected with busbar 2, moving contact 4 is positioned on the left of fixed contact 3, it is connected with the right-hand member of moving conductive rod 9, bellows 7 is set with outside moving conductive rod 9, bellows 7 is contained in insulated tube 6, insulated tube 6 external diameter is less than shielding cylinder 5 external diameter, the left end of moving conductive rod 9 stretches out insulated tube 6, insulated tube 6 left end cap is equipped with left cover 11, fairlead 8 is contained in the mouth of pipe place that moving conductive rod 9 stretches out left cover 11.
Described insulated tube 6 is porcelain tube.
Described insulated tube 6 right side and shielding cylinder 5 left side are connected and fixed.
Described fairlead 8 is sleeved on moving conductive rod 9.
The vacuum interrupter of the low-voltage, high-current high breaking that the utility model provides, different from traditional arc control device, large contact area and abundant diffusion space are that traditional arc control device are incomparable.After electric arc produces; the magnetic field that this structure distinctive large area contact system produces can make electric arc rotate with the high speed of nearly 60m/s; be much higher than the movement velocity of traditional arc control device; its larger external area more can cool arc energy fast simultaneously; make the arc extinction time shorter; thus better protect contact system, allow the breaking capacity of this infrastructure product and electric life all effectively can promote more than 30%.
Structure, ratio, size etc. that the present embodiment institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre ", " clockwise ", " counterclockwise " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
Claims (5)
1. the vacuum interrupter of a low-voltage, high-current high breaking, it comprises quiet ring flange (1), busbar (2), fixed contact (3), moving contact (4), shielding cylinder (5), insulated tube (6), bellows (7), fairlead (8) and moving conductive rod (9), it is characterized in that: the external diameter of described fixed contact (3) and moving contact (4) is not less than insulated tube (6) external diameter.
2. the vacuum interrupter of a kind of low-voltage, high-current high breaking as claimed in claim 1, it is characterized in that: described fixed contact (3) and moving contact (4) are contained in shielding cylinder (5), shielding cylinder (5) right end cap is equipped with quiet ring flange (1), busbar (2) is equipped with in quiet ring flange (1) outer end, fixed contact (3) right-hand member connects quiet base plate (10), quiet base plate (10) stretches out quiet ring flange (1) and is connected with busbar (2), moving contact (4) is positioned at fixed contact (3) left side, it is connected with the right-hand member of moving conductive rod (9), bellows (7) is set with outside moving conductive rod (9), bellows (7) is contained in insulated tube (6), insulated tube (6) external diameter is less than shielding cylinder (5) external diameter, the left end of moving conductive rod (9) stretches out insulated tube (6), insulated tube (6) left end cap is equipped with left cover (11), fairlead (8) is contained in the mouth of pipe place that moving conductive rod (9) stretches out left cover (11).
3. the vacuum interrupter of a kind of low-voltage, high-current high breaking as claimed in claim 1, is characterized in that: described insulated tube (6) is porcelain tube.
4. the vacuum interrupter of a kind of low-voltage, high-current high breaking as claimed in claim 1, is characterized in that: described insulated tube (6) right side and shielding cylinder (5) left side are connected and fixed.
5. the vacuum interrupter of a kind of low-voltage, high-current high breaking as claimed in claim 1, is characterized in that: described fairlead (8) is sleeved on moving conductive rod (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520776068.9U CN205104428U (en) | 2015-09-30 | 2015-09-30 | Disconnected vacuum interrupter of low pressure heavy current high score |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520776068.9U CN205104428U (en) | 2015-09-30 | 2015-09-30 | Disconnected vacuum interrupter of low pressure heavy current high score |
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| Publication Number | Publication Date |
|---|---|
| CN205104428U true CN205104428U (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520776068.9U Active CN205104428U (en) | 2015-09-30 | 2015-09-30 | Disconnected vacuum interrupter of low pressure heavy current high score |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558446A (en) * | 2015-09-30 | 2017-04-05 | 上海良信电器股份有限公司 | The vacuum interrupter of low-voltage, high-current high breaking |
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2015
- 2015-09-30 CN CN201520776068.9U patent/CN205104428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558446A (en) * | 2015-09-30 | 2017-04-05 | 上海良信电器股份有限公司 | The vacuum interrupter of low-voltage, high-current high breaking |
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