CN103000444B - Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof - Google Patents
Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof Download PDFInfo
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- CN103000444B CN103000444B CN201210478413.1A CN201210478413A CN103000444B CN 103000444 B CN103000444 B CN 103000444B CN 201210478413 A CN201210478413 A CN 201210478413A CN 103000444 B CN103000444 B CN 103000444B
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and an arc extinguishing method thereof. The arc extinguishing chamber mainly comprises a movable arc contactor, a static arc contactor, an expansion chamber, an air compression chamber, a double contraction expanded nozzle and an auxiliary nozzle and is characterized in that by means of the structure of the double contraction expanded nozzle, horizontal and longitudinal arc blowing modes are integrated so that arc blowing air current can rapidly disperse electric arc energy, and the recovery strength of arced media is rapidly improved to break high short-circuit current.
Description
Technical field
The present invention relates to a kind of self extinguishing type SF
6arc-extinguishing chamber of circuit breaker, especially Large Copacity self extinguishing type SF
6the arc-chutes of breaker.
Background technology
SF
6breaker experienced by by double voltage type, single pressure type to the evolution of self-energy arc-extinguishing chamber.Double voltage type breaker is eliminated already, current SF
6breaker is mainly single pressure type and self extinguishing type two kinds.The arc-extinguishing chamber of circuit breaker of these three kinds of forms above-mentioned is all single jet structure, the one direction along arc-chutes axis from upstream toward downstream is adopted to indulge the arc quenching method blown, can the arc blow-out air-flow whether arc extinction depends in spout spread out arc energy rapidly, improves the medium recovery strength between contact.
At present, self extinguishing type arc quenching method is the theoretic major progress of device for switching electric arc, and self-blasting circuit breaker is SF
6the developing direction of breaker, it is widely used in high pressure SF
6in breaker, the operating work of breaker can be made to decline to a great extent, the volume of product reduces, and reliability improves.
Along with the continuous increase of power system capacity, need the breaker that break performance requirement is higher, drop-out current requires higher, even reach kilo-ampere up to a hundred, as the large capcity breaker for generator outlet, it belongs to the special switch equipment of a kind of performance requirement far above present power transmission and distribution breaker, cut-off rated short circuit current high, cut-off that the high and time constant of short circuit current DC component is long, rate of rise of transient recovery voltage quickly.
But present self extinguishing type SF
6breaker cut-offs electric power and only reaches tens kilo-amperes, be difficult to reach such requirement, one of the main reasons is that the air-flow arc blow-out of single jet structure arc-chutes is limited in one's ability, the energy of electric arc and diffuse arc can not be cooled in time, thus medium recovery strength can not be improved rapidly when cut-offfing higher short circuit current.
Summary of the invention
The present invention will solve self extinguishing type SF
6breaker cut-offs the technical problem of higher short circuit current, and provides the arc-chutes of a kind of pair of shrinkage expansion shape spout structure to control arc blow-out air-flow, accelerates arc energy diffusion, improves rapidly medium recovery strength, reach the object of extinguish arcs.
According to above-mentioned technical problem to be solved, its embodiment is: self extinguishing type SF
6the two nozzle type arc-chutes of breaker, mainly comprise moving arcing contact, static arc contact, expanding chamber, plenum chamber, two shrinkage expansion shape spout and subjet.Two spout is made up of left spout and right spout, and the two is positioned at same axis, is distributed in symmetrically and SF is housed
6the both sides of the tubular expanding chamber of gas also communicate with it, the throat diameter D of spout
kbe 85 ~ 95mm, spout catchment subtended angle φ is 30 ° ~ 40 °.The converging diverging shape of formula that spout structure all adopts " Laval spout ", namely the sectional area at place of spout throat is minimum, and along spout catchment, its sectional area becomes large gradually.Its principle is when upstream gas pressure is enough large, and the speed of throat reaches local velocity of sound.Along the direction of catchment after Guo Liao throat, air-flow continues to accelerate and decompression, air-flow Supersonic Flow.And swim in the distance of throat from air-flow, the speed of air-flow is subsonic flow lower than velocity of sound.Static arc contact stretches in two spout, and coordinates with moving arcing contact radial clearance.It is outer and coupled logical that tubular plenum chamber is positioned at expanding chamber, and subjet is positioned in the middle of spout throat.Its arc-suppressing method is the spout choking phenomenon and the thermal boundary region choking phenomenon that utilize electric arc, heating SF
6gas, improves the pressure of arc-chutes upstream gas.Meanwhile, plenum chamber cylinder too increases the pressure of arc-chutes upstream gas.When current over-zero, upstream high strength body blows rear vertical mode of blowing by first horizontal two spouts carries out arc blow-out respectively from left and right, make arc blow-out air-flow disperse arc energy rapidly, thus after fast lifting arc, medium recovery strength reaches the object of arc extinguishing.
Accompanying drawing explanation
Fig. 1 is self extinguishing type SF
6the two nozzle type arc-chutes schematic diagram of breaker
Fig. 2 is the airflow state schematic diagram of arc stage in arc-chutes
Fig. 3 is the airflow state schematic diagram in arc extinguishing stage in arc-chutes
Detailed description of the invention
In conjunction with above-mentioned attached Example, the present invention is described in detail again.
Two spout arc-chutes (Fig. 1) comprise moving arcing contact (1), static arc contact (2), expanding chamber (3), plenum chamber (4), two spout (5,6) and subjet (7).Two spout is made up of left spout (5) and right spout (6), and the two is positioned at same axis, is distributed in symmetrically and SF is housed
6the both sides of the tubular expanding chamber (3) of gas also communicate with it, static arc contact (2) stretches at two spout (5,6) in, and coordinate with moving arcing contact (1) radial clearance, it is outer and coupled logical that tubular plenum chamber (4) is positioned at expanding chamber (3), and subjet (7) is positioned in the middle of spout throat.
The arc-suppressing method of two spout arc-chutes: in interrupting process, moving arcing contact (1) separates with static arc contact (2) and produces electric arc.Consider from flow angle, the effective area of the appearance Hui Shi throat of electric arc and flow reduce.In high short circuit current situation, electric arc and thermal boundary region thereof can occupy the area of whole throat, cause NOZZLE ARC to be blocked and thermal boundary region obstruction.Utilize spout choking phenomenon and the thermal boundary region choking phenomenon of electric arc, the SF around electric arc heated
6gas, hot gas enters in expanding chamber (3), and the interior gas pressure of expanding chamber (3) raises, thus the pressure established needed for arc extinguishing, it shows as two aspects, and one is that the subjet (7) of hot gas in the middle part of spout throat enters expanding chamber, improves upstream gas pressure.Two is out enter expanding chamber again from right spout (6), adds the pressure (Fig. 2) of expanding chamber gas.When current over-zero, the high-pressure gas in expanding chamber (3) from the upstream of spout, subjet (7) blow out, arc blow-out mode is now horizontal blowing, it blow direction perpendicular to electric arc, cooling electric arc.Then the throat through left spout (5) and right spout (6) blows to electric arc from left and right both direction simultaneously, and left, the arc blow-out direction of right spout (6) to the right in the arc blow-out direction of left spout (5).Arc blow-out mode is now blown for vertical, it blow the energy of direction along the axial diffuse arc rapidly of electric arc, finally make electric arc extinguish (Fig. 3) during current over-zero.When drop-out current is less, arc energy is little, relies on arc energy to be not enough to the pressure set up needed for extinguish arcs, now needs to rely on the piston of plenum chamber (4) to carry out extinguish arcs with moving arcing contact (1) pressure improving upstream that moves simultaneously.
Claims (1)
1. a self extinguishing type SF
6the arc-suppressing method of the two nozzle type arc-chutes of breaker, comprise moving arcing contact (1), static arc contact (2), expanding chamber (3), plenum chamber (4), two spout (5,6) and subjet (7); Two spout is made up of left spout (5) and right spout (6), and the two is positioned at same axis, is distributed in symmetrically and SF is housed
6the both sides of the tubular expanding chamber (3) of gas also communicate with it; Left spout (5) and right spout (6) all adopt the converging diverging shape structure of " Laval spout " formula, and namely the sectional area at place of spout throat is minimum, and along spout catchment, its sectional area becomes large gradually; Its principle is when upstream gas pressure is enough large, and the speed of throat reaches local velocity of sound, and along the direction of catchment after Guo Liao throat, air-flow continues to accelerate and decompression, air-flow Supersonic Flow; The throat diameter D of left spout (5) and right spout (6)
kbe 85 ~ 95mm, spout catchment subtended angle φ is 30 ° ~ 40 °; Static arc contact (2) stretches in two spout (5,6), and coordinates with moving arcing contact (1) radial clearance; It is outer coupled logical that tubular plenum chamber (4) is positioned at expanding chamber (3), and be positioned at directly over it; Subjet (7) is positioned in the middle of two spout throat; Its arc-suppressing method utilizes the left spout (5) and these two spouts of right spout (6) that are positioned at same axis, accelerates the extinguishing of electric arc by the mode of the longitudinal arc blow-out of twocouese after first horizontal arc blow-out; It is characterized in that when cut-offfing high short circuit current, moving arcing contact (1) separates with static arc contact (2) and produces electric arc, SF around electric arc heated
6gas, hot gas enters in expanding chamber (3), the interior gas pressure of expanding chamber (3) raises, thus the pressure established needed for arc extinguishing, it shows as two aspects, and one is that hot gas enters expanding chamber from subjet (7), improves upstream gas pressure, two is out enter expanding chamber (3) again from right spout (6), adds the pressure of expanding chamber gas; When current over-zero, the high-pressure gas in expanding chamber (3) from subjet (7) blowout, arc blow-out mode is now horizontal blowing, it blow direction perpendicular to electric arc, cooling electric arc; Then the throat through left spout (5) and right spout (6) blows to electric arc from left and right both direction simultaneously, the arc blow-out direction of left spout (5) left, the arc blow-out direction of right spout (6) to the right, arc blow-out mode is now blown for vertical, it blow the energy of direction along the axial rapidly diffuse arc of electric arc, finally make electric arc extinguish during current over-zero; When drop-out current is less, arc energy is little, rely on arc energy to be not enough to the pressure set up needed for extinguish arcs, now need to rely on the piston of plenum chamber (4) to carry out extinguish arcs with moving arcing contact (1) pressure improving upstream that moves simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478413.1A CN103000444B (en) | 2012-11-22 | 2012-11-22 | Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478413.1A CN103000444B (en) | 2012-11-22 | 2012-11-22 | Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof |
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| Publication Number | Publication Date |
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| CN103000444A CN103000444A (en) | 2013-03-27 |
| CN103000444B true CN103000444B (en) | 2015-03-25 |
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| CN201210478413.1A Expired - Fee Related CN103000444B (en) | 2012-11-22 | 2012-11-22 | Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609367A (en) * | 2016-03-03 | 2016-05-25 | 贝司特电气有限公司 | Gas-insulated AC high-voltage circuit breaker |
| CN105869945B (en) * | 2016-05-05 | 2019-01-22 | 平高集团有限公司 | A kind of high-voltage switch gear and its breaker unit |
| CN111725024B (en) * | 2020-06-29 | 2022-10-18 | 西安西电开关电气有限公司 | High-voltage circuit breaker and arc extinguish chamber thereof |
| CN114597093B (en) * | 2020-12-04 | 2024-01-26 | 西安西电高压开关有限责任公司 | Drainage type auxiliary arc extinguishing device and circuit breaker |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306591A (en) * | 2011-08-31 | 2012-01-04 | 中国西电电气股份有限公司 | Self-energy arc extinguishing switch device comprising composite insulation cylinder |
| EP2455957A1 (en) * | 2010-11-22 | 2012-05-23 | ABB Research Ltd. | Gas insulated circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19816505A1 (en) * | 1998-04-14 | 1999-10-21 | Asea Brown Boveri | Circuit breaker |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2455957A1 (en) * | 2010-11-22 | 2012-05-23 | ABB Research Ltd. | Gas insulated circuit breaker |
| CN102306591A (en) * | 2011-08-31 | 2012-01-04 | 中国西电电气股份有限公司 | Self-energy arc extinguishing switch device comprising composite insulation cylinder |
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