CN104538239A - Nozzle, arc chute using nozzle, breaker and change-over switch - Google Patents
Nozzle, arc chute using nozzle, breaker and change-over switch Download PDFInfo
- Publication number
- CN104538239A CN104538239A CN201410664130.5A CN201410664130A CN104538239A CN 104538239 A CN104538239 A CN 104538239A CN 201410664130 A CN201410664130 A CN 201410664130A CN 104538239 A CN104538239 A CN 104538239A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- air
- necking down
- nozzle body
- outlet section
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
- H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/22—Selection of fluids for arc-extinguishing
Landscapes
- Circuit Breakers (AREA)
Abstract
The invention discloses a nozzle, an arc chute using the nozzle, a breaker and a change-over switch. A gas vent which is arranged at a necking throat or extends from the necking throat to an air outlet section is arranged on the inner wall of a nozzle body. The gas vent is a through groove, the inlet of which is communicated with an air intake section, and the outlet of which is communicated with the air outlet section. When the nozzle is used, arc extinguishing gas blows down some metal powder and ionized decomposer from a moving arc contact and a static arc contact, and the metal powder and the ionized decomposer mix in the arc extinguishing gas so as to form mixed gas. When the mixed gas enters the necking throat from the broad air intake section, the mixed gas pressurizes so as to allow the gas vent to lead the deposited impurities to flow to the air outlet section, so that the deposited impurities cannot block a clearance between the hole wall surface of the necking throat and the peripheral surface of the static arc contact, and the arc extinguishing flow is smooth in arc extinguishing through blowing.
Description
Technical field
The present invention relates to a kind of nozzle and use arc control device, circuit breaker, the transfer switch unit of this nozzle.
Background technology
Along with the fast development of national economy, the amount of power of China sharply rises, but the energy of China is mainly distributed in west area, the city that electricity needs is larger then mainly concentrates on the southeastern coastal areas, therefore in order to better carry out resource distribution, improve power transfer efficiency, line efficiency and transmission line capability are existing both economical electric power resource concocting methods, especially in the last few years, along with constantly the carrying out of extra-high voltage direct-current transmission engineering of domestic electrical network, the electrical network of most area has achieved maximum amount and has determined the direct current transportation that electric current reaches 5000A, this also just has higher requirement to being applicable to the through-current capability of DC switch equipment in electrical network, moreover next step needs electrical network is upgraded to maximum amount determine electric current reach 6000A time, higher requirement will be proposed to the through-current capability of switch each in electrical network.And in existing direct current network, primary cut-out selected usually by the switchgear carrying out big current conversion, the arc extinguishing ability of primary cut-out is again play important impact to its through-current capability.At present, the main arc quenching method of primary cut-out is the mode of sulfur hexafluoride gas arc blow-out, along with moving of primary cut-out, the action of quiet end divide-shut brake, high-voltage arc can be produced between moving arcing contact and static arc contact, and this part high-voltage arc will be in the nozzle of moved end assembling, namely be in spout, now the gases at high pressure spurted in spout by moved end are carried out air blowing arc extinguishing, but while air blowing arc extinguishing, static arc contact and nozzle can be relative in the axial direction move toward one another, especially when static arc contact passes through the throat of nozzle, the impurity such as the metal dust that produces in air blowing arc extinguishing and ionization analyte can be hindered compared with small―gap suture between static arc contact and nozzle throat, so that there is the phenomenon that air-flow is not smooth in nozzle, affect normal air blowing arc extinguishing efficiency, also the through-current capability of primary cut-out is caused to reduce.
Summary of the invention
The object of this invention is to provide a kind of nozzle avoiding occurring in air blowing arc extinguishing process the problem that arc extinguishing air-flow is not smooth, additionally provide a kind of circuit breaker, the transfer switch unit that use the arc control device of this nozzle and use these arc control device simultaneously.
In order to realize above object, in the present invention, the technical scheme of nozzle is as follows:
Nozzle, comprise canular nozzle body, the endoporus of nozzle body is made up of the air inlet section set gradually vertically, necking down throat and air outlet section, necking down throat is narrower than inlet, outlet section, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, goes out the straight-through groove of end opening connection air outlet section.
Air slot is the axially extended helicla flute around nozzle body.
The single thread rotation direction that spiral fluted bearing of trend is is axis with the central axis of nozzle body.
Be provided with transition in nozzle body and be connected to the step surface towards air inlet section between air inlet section and necking down throat, the outside of step surface is connected by inner concave arc surface transition with the wall surface of the hole of air inlet section, and the inlet side opening of air slot is in the intermediate location between the inner side of step surface and the wall surface of the hole of necking down throat.
The technical scheme of arc control device of the present invention is as follows:
Arc control device, comprise the dynamic and static contact be oppositely arranged and the nozzle be assemblied on moving contact, nozzle has canular nozzle body, the endoporus of nozzle body is made up of the air inlet section set gradually vertically, necking down throat and air outlet section, necking down throat is narrower than inlet, outlet section, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, goes out the straight-through groove of end opening connection air outlet section.
Air slot is the axially extended helicla flute around nozzle body.
The single thread rotation direction that spiral fluted bearing of trend is is axis with the central axis of nozzle body.
The technical scheme of circuit breaker of the present invention is as follows:
Circuit breaker, comprise the arc control device of tank body and interior assembling thereof, arc control device comprise the dynamic and static contact be oppositely arranged and the nozzle be assemblied on moving contact, nozzle has canular nozzle body, the endoporus of nozzle body is made up of the air inlet section set gradually vertically, necking down throat and air outlet section, necking down throat is narrower than inlet, outlet section, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, goes out the straight-through groove of end opening connection air outlet section.
The technical scheme of transfer switch unit of the present invention:
Transfer switch unit, comprise circuit breaker parallel with one another and concussion loop, circuit breaker comprises the arc control device of tank body and interior assembling thereof, arc control device comprise be oppositely arranged dynamic, fixed contact and the nozzle be assemblied on moving contact, nozzle has canular nozzle body, the endoporus of nozzle body is by the air inlet section set gradually vertically, necking down throat and air outlet section composition, necking down throat ratio enters, air outlet section is narrow, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, go out the straight-through groove that end opening is communicated with air outlet section.
Cut-off branch road, concussion loop and the two ends of nonlinear resistance branch road and be also parallel with diverter branch, in diverter branch, be serially connected with circuit breaker.
In the present invention nozzle body inwall on offer the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, go out the straight-through groove that end opening is communicated with air outlet section, in use, along with dynamic, dividing of fixed contact, feed motion, when under the state that fixed contact is also in the air inlet section of nozzle, high-voltage arc between moving arcing contact and static arc contact can be blown out by the arc extinguishing gases sprayed in moving contact, simultaneously can from some metal dusts moving arcing contact and static arc contact blowing up and ionization analyte, these materials are blended in arc extinguishing gases and form mist, this mist will pressurize when entering necking down throat from open air inlet section, and although the fixing impurity be mixed in mist can form blocking in the gap between the wall surface of the hole of the necking down throat of nozzle body and the outer peripheral face of static arc contact, but air slot can guide these impurity deposited to flow to air outlet section, the impurity got off to make deposition can not block the gap between the wall surface of the hole of necking down throat and the outer peripheral face of static arc contact, avoid occurring the problem that arc extinguishing air-flow is not smooth in air blowing arc extinguishing process.Simultaneously, because there is the guide function to air-flow in air slot, so in the air blowing arc extinguishing stage, compare the necking down throat in light face, Venturi tube effect not only by necking down throat in nozzle body in the present invention carries out pressurization to air-flow to accelerate, and guide channel also can guide acceleration to air-flow, thus will improve the overall flow velocity of arc extinguishing gases, realize high speed arc extinguishing, to improve the arc-rupturing capacity of whole arc control device.
Further, air slot is the axially extended helicla flute around nozzle body, such air-flow will enter air outlet section in the mode of helical flow from necking down throat and spray, the mode of middle air-flow direct current ejection compared to existing technology, the helical flow of arc extinguishing gases singly can not increase the flowing formation of arc extinguishing air-flow, to increase the cooling effect of self and the cooling effect to static arc contact; The mode that the arc extinguishing air-flow of helical flow can be accelerated by spiral simultaneously increases flow velocity, improves the flow velocity of air-flow in air inlet section further, improves arc-rupturing capacity.Simultaneously, after arc extinguishing gases spiral accelerates, solid impurity in mist, by the internal face of the groove bottom or nozzle body that are placed in air slot under the influence of centrifugal force, will avoid solid impurity to slide at the outer peripheral face of static arc contact and the scuffing that causes the outer peripheral face of static arc contact like this.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of transfer switch unit of the present invention;
Fig. 2 is the structural representation of the arc control device of circuit breaker in Fig. 1;
Fig. 3 is the structural representation of nozzle in Fig. 2.
Embodiment
The embodiment of transfer switch unit in the present invention: as shown in Figure 1 to Figure 3, this transfer switch unit is a kind ofly applicable to the direct current change over switch that rated current reaches 6000A, comprise nonlinear resistance 1 parallel with one another, concussion loop 2, cut-off branch road 3 and diverter branch 4, cut-off the components and parts that cut-off adopted in branch road 3 and diverter branch 4 and be circuit breaker, this circuit breaker comprises the arc control device of tank body and interior assembling thereof, arc control device comprise the moving contact 6 be oppositely arranged, fixed contact 5 and the nozzle 7 be assemblied on moving contact 6, the nozzle body 71 of nozzle 7 is pipe box shape, the endoporus of nozzle body 71 is by the air outlet section 72 set gradually from front to back vertically, necking down throat 73 and air inlet section 74 are formed, the surface of revolution of the wall surface of the hole of necking down throat 73 to be bus the be evagination camber line bent outwards gradually from back to front, the wall surface of the hole of necking down throat 73 offers air slot 75.By groove structure classification, this air slot 75 is straight-through groove, the front end of the inlet side open communication air inlet section 74 of air slot 75, the rear end going out end opening connection air outlet section 72 of air slot 75.By extended structure classification, this air slot 75 is the axially extended helicla flute around nozzle body 71, the single thread rotation direction that this spiral fluted bearing of trend is is axis with the central axis of nozzle body 71.
The air inlet section 74 of nozzle body 71 is become large reaming section from front to back gradually, and air inlet section 74 and necking down throat 73 are by step surface transition backwards, the outside of this step surface is connected by rear inner concave arc surface transition with the wall surface of the hole of air inlet section 74, the inner side of step surface and the wall surface of the hole of necking down throat 73 are again be connected by outer convex globoidal transition, the subsequent corrosion of rear inner concave arc surface is greater than the subsequent corrosion of outer convex globoidal, and the inlet side opening of air slot 75 is on this outer convex globoidal.
The air outlet section 72 of nozzle body 71 becomes large reaming section from back to front gradually, the open rearward end of air inlet section 74 is more bigger than the front opening of necking down throat 73, so that the wall surface of the hole of necking down throat 73 is also be connected by front inner concave arc surface transition with the wall surface of the hole of air outlet section 72, the subsequent corrosion of this front inner concave arc surface is less, and the end opening that goes out of gathering sill is on this front inner concave arc surface.The front end opening of air outlet section 72 is divided into straight mouth section.
Nozzle body 71 is arranged on contact base by moving contact 6, and on contact base, be provided with the cylinder body 8 of air cylinder, be provided with guiding movement along the longitudinal direction at the rear of moving contact 6 and be assemblied in dynamic bearing 9 in cylinder body 8, and on moving contact 6, offer the pore 10 of the inclination being communicated with the air chamber of air cylinder and the air inlet section 74 of nozzle body 71, this pore 10 in the circumference of moving contact 6 uniformly at intervals, the aperture of pore 10 is larger than air vent aperture on common moving contact, can ensure that gas arrives in the endoporus of nozzle 7 smoothly like this, air cylinder internal gas pressure can be reduced simultaneously, gas counter-force during reduction separating brake, reduce operating work.
In the present embodiment, direct current change over switch is when normally running, cut-off branch road 3 and diverter branch 4 is all in closing position, parallel-connection structure shared regular link running current, owing to there is inhomogeneities between parallel branch, the electric current causing branch road middle is also incomplete same, but the electric current that each branch road passes through is far smaller than the total current that circuit runs, solve the requirement of through-current capability in capacity boost.When system operation mode needs to change, first in diverter branch 4, circuit breaker accepts instruction first separating brake, cut-offfing circuit breaker in branch road 3 keeps combined floodgate to be failure to actuate, in △ t, certain voltage is set up between breaker fracture in diverter branch 4, electric current is all transferred to and cut-offs branch road 3, transfer process completes by cut-offfing branch road 3.Secondly, diverter branch 4 after separating brake △ t, under ensureing the condition of insulating requirements, cut-off branch road 3 to accept separating brake instruction and start separating brake, vibration branch road forms the oscillating current of zero crossing gradually, under the endergonic cooperation of nonlinear resistance 1, cut-off branch road 3 and complete arc extinguishing, realize current conversion smoothly.
In the present embodiment, direct current change over switch adopts the topological structure of brand-new identical arc quenching chamber structure parallel form, the very effective through-current capability improving change over switch.When needing change over switch generation action, first the switch of diverter branch 4 is disconnected, certain voltage (being equal to diverter branch 4 liang of terminal impedances to increase) is set up between the fracture of diverter branch 4, current transfer is to cut-offfing branch road 3, under diverter branch 4 ensures the condition of insulation, electric current has been coordinated to walk around function by cut-offfing branch road 3, oscillation circuit and nonlinear resistance 1.Secondly, in order to ensure that change over switch successfully can realize the conversion of big current, arc quenching chamber structure being optimized, enhancing the connecting-disconnecting function of single arc control device.Expand the pore 10 in the moving arcing contact connecting air cylinder air chamber and spout inner chamber, can prevent air velocity from reducing like this.The chamber volume of air cylinder reduces fast in separating brake process, and air pressure increases, and gas is got rid of by pore 10, and because pore 10 cross section is less, air velocity is fast, and air velocity can strengthen arc blow-out ability fast, accelerates arc extinguishing; But the gas flowing through pore 10 arrives spout inner chamber due to volume increase and high speed impact spout inwall, and speed reduces.Patent of the present invention, by expanding pore 10, not only ensures that gas arrives spout inner chamber smoothly, also can reduce air cylinder air pressure inside simultaneously, reduces back force in puff, reduce the requirement to operating mechanism operating work.Finally, air-flow formation starts from spout and leaves quiet arc fingertip, changes spout structure, increases air-blowing effect, improves arc extinguishing ability.Spout throat opens spiral groove, and due to helical form, gas flows through in spout process, and unsymmetrical knot is configured to draught head, and gas volume difference causes thermal differential, is conducive to forming turbulent flow when gas flows through spout, causes the effect of horizontal arc blow-out, strengthens arc extinction performance.
In the above-described embodiments, air slot is single-wire helix groove, and in other embodiments, this air slot also can be more than two-wire or two-wire helicla flute or straight-line groove or deep-slotted chip breaker etc.
In the above-described embodiments, air slot is in necking down throat, and in other embodiments, air slot also can extend to air outlet section from necking down throat.
The embodiment of circuit breaker of the present invention: in the present embodiment, the structure of circuit breaker is identical with the structure of circuit breaker in above-described embodiment, therefore repeats no more.
The embodiment of arc control device of the present invention: in the present embodiment, the structure of arc control device is identical with the structure of arc control device in above-described embodiment, therefore repeats no more.
The embodiment of nozzle of the present invention: in the present embodiment, the structure of nozzle is identical with the structure of nozzle in above-described embodiment, therefore repeats no more.
Claims (10)
1. nozzle, comprise canular nozzle body, the endoporus of nozzle body is made up of the air inlet section set gradually vertically, necking down throat and air outlet section, necking down throat is narrower than inlet, outlet section, it is characterized in that, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, goes out the straight-through groove of end opening connection air outlet section.
2. nozzle according to claim 1, is characterized in that, air slot is the axially extended helicla flute around nozzle body.
3. nozzle according to claim 2, is characterized in that, the single thread rotation direction that spiral fluted bearing of trend is is axis with the central axis of nozzle body.
4. the nozzle according to claim 1 or 2 or 3, it is characterized in that, be provided with transition in nozzle body and be connected to the step surface towards air inlet section between air inlet section and necking down throat, the outside of step surface is connected by inner concave arc surface transition with the wall surface of the hole of air inlet section, and the inlet side opening of air slot is in the intermediate location between the inner side of step surface and the wall surface of the hole of necking down throat.
5. arc control device, comprise the dynamic and static contact be oppositely arranged and the nozzle be assemblied on moving contact, nozzle has canular nozzle body, the endoporus of nozzle body is made up of the air inlet section set gradually vertically, necking down throat and air outlet section, necking down throat is narrower than inlet, outlet section, it is characterized in that, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, goes out the straight-through groove of end opening connection air outlet section.
6. arc control device according to claim 5, is characterized in that, air slot is the axially extended helicla flute around nozzle body.
7. arc control device according to claim 6, is characterized in that, the single thread rotation direction that spiral fluted bearing of trend is is axis with the central axis of nozzle body.
8. circuit breaker, comprise the arc control device of tank body and interior assembling thereof, arc control device comprise the dynamic and static contact be oppositely arranged and the nozzle be assemblied on moving contact, nozzle has canular nozzle body, the endoporus of nozzle body is made up of the air inlet section set gradually vertically, necking down throat and air outlet section, necking down throat is narrower than inlet, outlet section, it is characterized in that, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, goes out the straight-through groove of end opening connection air outlet section.
9. transfer switch unit, comprise and parallel with one another cut-off branch road, concussion loop, nonlinear resistance branch road, cut-off in branch road and be serially connected with circuit breaker, circuit breaker comprises the arc control device of tank body and interior assembling thereof, arc control device comprise be oppositely arranged dynamic, fixed contact and the nozzle be assemblied on moving contact, nozzle has canular nozzle body, the endoporus of nozzle body is by the air inlet section set gradually vertically, necking down throat and air outlet section composition, necking down throat ratio enters, air outlet section is narrow, it is characterized in that, the inwall of nozzle body offers the air slot being in necking down throat or extending to air outlet section from necking down throat, air slot is inlet side open communication air inlet section, go out the straight-through groove that end opening is communicated with air outlet section.
10. transfer switch unit according to claim 9, is characterized in that, cut-offs branch road, concussion loop and the two ends of nonlinear resistance branch road and is also parallel with diverter branch, be serially connected with circuit breaker in diverter branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410664130.5A CN104538239B (en) | 2014-11-20 | 2014-11-20 | A kind of nozzle and arc-chutes, breaker, the transfer switch unit using the nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410664130.5A CN104538239B (en) | 2014-11-20 | 2014-11-20 | A kind of nozzle and arc-chutes, breaker, the transfer switch unit using the nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104538239A true CN104538239A (en) | 2015-04-22 |
| CN104538239B CN104538239B (en) | 2017-06-06 |
Family
ID=52853746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410664130.5A Active CN104538239B (en) | 2014-11-20 | 2014-11-20 | A kind of nozzle and arc-chutes, breaker, the transfer switch unit using the nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104538239B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244795A (en) * | 2015-10-09 | 2016-01-13 | 维龙（镇江）电工研究院有限公司 | Single-phase module for load switch-fuse combination unit |
| CN108091517A (en) * | 2017-12-23 | 2018-05-29 | 中国西电电气股份有限公司 | A kind of arc-chutes of high-voltage alternating-current filter group breaker |
| CN112103122A (en) * | 2020-08-24 | 2020-12-18 | 沈阳金昌蓝宇新材料股份有限公司 | Thin-wall dissimilar metal composite grounding contact and preparation method thereof |
| CN114400172A (en) * | 2021-12-10 | 2022-04-26 | 河南平高电气股份有限公司 | Spout and explosion chamber of explosion chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100918A (en) * | 1985-02-15 | 1986-10-01 | 株式会社日立制作所 | A kind of compressed gas type arc-extinguishing breaker |
| CN201112265Y (en) * | 2007-10-22 | 2008-09-10 | 沈阳工业大学 | Cyclone type nozzle high voltage gas blowing breaker with groove |
| CN201229893Y (en) * | 2008-06-30 | 2009-04-29 | 中国西电电气股份有限公司 | A converting switch circuit construction for high voltage DC transmission |
| JP2010244742A (en) * | 2009-04-02 | 2010-10-28 | Japan Ae Power Systems Corp | Gas-blast circuit breaker |
-
2014
- 2014-11-20 CN CN201410664130.5A patent/CN104538239B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100918A (en) * | 1985-02-15 | 1986-10-01 | 株式会社日立制作所 | A kind of compressed gas type arc-extinguishing breaker |
| CN201112265Y (en) * | 2007-10-22 | 2008-09-10 | 沈阳工业大学 | Cyclone type nozzle high voltage gas blowing breaker with groove |
| CN201229893Y (en) * | 2008-06-30 | 2009-04-29 | 中国西电电气股份有限公司 | A converting switch circuit construction for high voltage DC transmission |
| JP2010244742A (en) * | 2009-04-02 | 2010-10-28 | Japan Ae Power Systems Corp | Gas-blast circuit breaker |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244795A (en) * | 2015-10-09 | 2016-01-13 | 维龙（镇江）电工研究院有限公司 | Single-phase module for load switch-fuse combination unit |
| CN108091517A (en) * | 2017-12-23 | 2018-05-29 | 中国西电电气股份有限公司 | A kind of arc-chutes of high-voltage alternating-current filter group breaker |
| CN112103122A (en) * | 2020-08-24 | 2020-12-18 | 沈阳金昌蓝宇新材料股份有限公司 | Thin-wall dissimilar metal composite grounding contact and preparation method thereof |
| CN112103122B (en) * | 2020-08-24 | 2023-01-31 | 沈阳金昌蓝宇新材料股份有限公司 | Thin-wall dissimilar metal composite grounding contact and preparation method thereof |
| CN114400172A (en) * | 2021-12-10 | 2022-04-26 | 河南平高电气股份有限公司 | Spout and explosion chamber of explosion chamber |
| CN114400172B (en) * | 2021-12-10 | 2024-04-19 | 河南平高电气股份有限公司 | Nozzle of arc extinguishing chamber and arc extinguishing chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104538239B (en) | 2017-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104538239A (en) | Nozzle, arc chute using nozzle, breaker and change-over switch | |
| CN106710961A (en) | Circuit breaker as well as arc extinguishing chamber and nozzle thereof | |
| CN100565745C (en) | The blast pipe that is used for circuit breaker | |
| CN101162662A (en) | Cyclone type nozzle high-pressure blowing circuit breakers with blades | |
| CN109564832A (en) | Gas-insulating type low pressure or in break load switch | |
| CN104810222B (en) | The arc-chutes of a kind of fast arc extinction and apply the miniaturization chopper of these arc-chutes | |
| CN205303327U (en) | Electrical switching device | |
| CN103311049A (en) | Circuit breaker arc extinguishing chamber and static arc contact thereof | |
| CN101162663A (en) | Cyclone type nozzle high-pressure blowing circuit breakers with groove | |
| CN201112265Y (en) | Cyclone type nozzle high voltage gas blowing breaker with groove | |
| CN202871728U (en) | Arc guiding and extinguishing device and direct current circuit breaker using same | |
| CN205959932U (en) | Circuit breaker striking structure | |
| CN203839319U (en) | Miniature circuit breaker having arc spray mechanism | |
| CN208142123U (en) | Contacts of low-voltage circuit breaker arc-control device structure-improved | |
| CN102820168A (en) | Pull rod joint and transmission pull rod of arc extinguish chamber of high voltage circuit breaker with pull rod joint | |
| CN106677111B (en) | Air duct and road cleaning device | |
| CN111630621B (en) | Circuit breaker and method of performing current breaking operation | |
| CN201601078U (en) | Transmission pulling rod for explosion chamber of high voltage circuit breaker | |
| CN202523631U (en) | Circuit breaker arc extinguish chamber and static arc contact thereof | |
| CN204271016U (en) | A kind of arc-extinguishing mechanism of circuit breaker | |
| CN201673855U (en) | Breaker gas stream guide device | |
| CN209471876U (en) | A kind of arc-extinguishing mechanism of breaker of plastic casing | |
| CN208738166U (en) | A kind of air-sweeping type arc-chutes and air-blowing structure for residual current circuit breaker | |
| CN213936098U (en) | Contact arc extinguishing system of circuit breaker | |
| CN205667904U (en) | A kind of tubular electrostatic precipitator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |