CN112331517A - Gas arc-extinguishing chamber - Google Patents
Gas arc-extinguishing chamber Download PDFInfo
- Publication number
- CN112331517A CN112331517A CN202011308960.6A CN202011308960A CN112331517A CN 112331517 A CN112331517 A CN 112331517A CN 202011308960 A CN202011308960 A CN 202011308960A CN 112331517 A CN112331517 A CN 112331517A
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- China
- Prior art keywords
- arc
- gas
- cyclone channel
- ring
- axis
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- 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.)
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Classifications
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- 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
-
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
- H01H2009/526—Cooling of switch parts of the high voltage switches
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to the technical field of arc extinction of circuit breakers, in particular to a gas arc-extinguishing chamber, which comprises a first arc-burning ring and a second arc-burning ring, wherein an arc area is formed between the first arc-burning ring and the second arc-burning ring, one side of the arc area is provided with a cyclone channel, and one side of the cyclone channel is provided with an expansion chamber; a moving contact is arranged at the other side of the arc area, and at least one of the first arc burning ring and the second arc burning ring is in sliding contact with the moving contact; the cyclone passage is provided with a flow deflector for changing the direction of the gas to form a rotation component. The invention can improve the medium recovery strength after the zero crossing of the arc region.
Description
Technical Field
The invention relates to the technical field of arc extinction of circuit breakers, in particular to a gas arc extinction chamber.
Background
SF6As an excellent insulating and arc extinguishing medium, it is widely used in high-voltage circuit breakers. The generator circuit breaker is used for starting and stopping various power plant units and protecting important equipment, and the units above 200MW generally adopt alternating-current SF6A generator circuit breaker.
The maximum short-circuit breaking current of the line circuit breaker used for the 35 kV-1000 kV alternating-current transmission network is generally 63kA, and the principle of an arc extinguishing chamber is mainly a compressed gas type and a self-energy expansion type. The air pressure of the expansion chamber is improved by utilizing the self energy of the electric arc during a large current period, namely the expansion chamber stores hot air diffused in the electric arc region, the air pressure of the expansion chamber is improved in the process, the air pressure of the electric arc region is reduced during a current zero passage period, and high-pressure air in the expansion chamber flows back to the electric arc region to cool and extinguish the electric arc. Therefore, the gas state in the gas chamber during the arcing, especially the average temperature, and the blowing form during the current zero-crossing have an extremely important role in fully exerting the cooling effect of the arc gap medium.
Due to the alternating current SF6The short-circuit breaking current of the generator breaker is as high as dozens to hundreds of kA, the thermal effect of the electric arc is extremely obvious, and in order to effectively utilize the self energy of the electric arc to break the fault current, the self-energy expansion arc extinguishing principle is generally adopted. Considering that the arc energy of the generator breaker is huge, even if the self-energy expansion principle is adopted, the air temperature of the expansion chamber is higher. Because the short-circuit current is large and the volume of the expansion chamber is also large, whether the cold and hot gas is mixed uniformly or not has large influence on cooling of an arc region in the later current zero-crossing period. During the current zero crossing, the high pressure gas stored in the expansion chamber during high current will flow back to the arc region to blow out the arc, so the blowing pattern, including velocity, will also have a greater effect on the cooling of the arc region. The cooling degree and the medium recovery strength of the arc regionI.e. the current breaking capacity is directly related (the lower the temperature and the higher the pressure, the stronger the capacity of the medium to withstand voltage without breaking down, for the same gaseous medium).
Disclosure of Invention
The object of the present invention is to provide a gas arc-extinguishing chamber which is capable of overcoming some or some of the drawbacks of the prior art.
The gas arc extinguish chamber comprises a first arc burning ring and a second arc burning ring, wherein an arc area is formed between the first arc burning ring and the second arc burning ring, a cyclone channel is arranged at one side of the arc area, and an expansion chamber is arranged at one side of the cyclone channel; a moving contact is arranged at the other side of the arc area, and at least one of the first arc burning ring and the second arc burning ring is in sliding contact with the moving contact;
the cyclone passage is provided with a flow deflector for changing the direction of the gas to form a rotation component.
Preferably, the number of guide vanes is at least two.
Preferably, the cyclone channel is of a rotationally symmetrical structure as a whole, and the first arc burning ring, the second arc burning ring, the cyclone channel and the expansion chamber are coaxial with an axis A and are arranged in sequence along the axis A.
Preferably, the surface of the guide vane is a plane or a curved surface.
Preferably, the tangent of the surface of the flow deflector along the direction of the axis A forms an included angle with the axis A, and the included angle ranges from 0 degree to 45 degrees.
Preferably, the space distance between the tangent of the surface of the deflector perpendicular to the direction of the axis A and the axis A is in the range of 0-R/2, and R is the inner diameter of the cyclone channel.
Preferably, the side of the guide vane radially adjacent to the axis a may or may not reach the position of the axis a, i.e. several guide vanes may or may not touch.
Preferably, the cyclone channel comprises a hollow annular wall surface inside, the flow deflector is positioned in the wall surface, the wall surface is provided with a clamping groove, the flow deflector is screwed into the corresponding clamping groove, one side of the cyclone channel is provided with a pressing ring, and the pressing ring can press the flow deflector.
Preferably, one side of the cyclone channel is provided with a plurality of fixing holes, the fixing holes are matched with screws, and the pressing ring can be fixed on the cyclone channel through the matching of the fixing holes and the screws.
Preferably, the slots are rotationally symmetrically distributed, and the width of the outer diameter side of the slot opening is larger than that of the inner diameter side.
The invention sets a cyclone channel between the expansion chamber and the arc area of the arc extinguish chamber, the moving contact, the arc burning ring, the cyclone channel and the expansion chamber are coaxial and arranged in sequence along the axial line, and the gas flow from the arc area to the expansion chamber or from the expansion chamber to the arc area has a rotation component besides the axial direction. In the heavy current stage, hot gas rotates to enter the expansion chamber and then is mixed with the original cold gas, so that the gas temperature of the expansion chamber is not too high; when the low-temperature gas stored in the expansion chamber rotates and flows out at the current zero-crossing stage, the air blowing heat dissipation effect on the arc region is strengthened, and finally the medium recovery strength after the arc region crosses zero, namely the short-circuit current breaking capacity, is improved.
Drawings
FIG. 1 is a schematic view of a gas arc-extinguishing chamber according to embodiment 1;
FIG. 2 is a schematic view showing the structure of a swirl passage in example 1;
FIG. 3 is a schematic structural view of the components in example 2.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a gas arc-extinguishing chamber, which includes a first arc-burning ring 1 and a second arc-burning ring 2, an arc region 3 is formed between the first arc-burning ring 1 and the second arc-burning ring 2, a cyclone passage 6 is provided at one side of the arc region 3, an expansion chamber 5 is provided at one side of the cyclone passage 6, and the cyclone passage 6 is disposed at a portion where the arc region 3 is fluidly connected to the expansion chamber 5; the other side of the arc area 3 is provided with a movable contact 4, the contact of the movable contact 4 can axially move in two directions along an axis A, and the first arc burning ring 1 and the second arc burning ring 2 are in sliding contact with the movable contact 4.
The cyclone channel 6 is a rotational symmetric structure as a whole, the first combustion arc ring 1, the second combustion arc ring 2, the cyclone channel 6 and the expansion chamber 5 are coaxial and arranged in sequence along the axis a, at least two guide vanes 63 distributed in a rotational symmetric manner are arranged in the cyclone channel 6, the number of the guide vanes 63 is three in the embodiment, and the direction of the gas is changed after the gas flows through the guide vanes 63 to form a rotational component.
The surface of the flow deflector 63 is a plane or a curved surface, a tangent of the surface of the flow deflector 63 along the direction of the axis a has a certain included angle with the axis a, the included angle ranges from 0 degree to 45 degrees, the included angle of the embodiment ranges from 0 degree to 20 degrees, and the extension line of the tangent of the surface of the flow deflector 63 perpendicular to the direction of the axis a is not completely intersected with the axis a. The side of the guide vanes 63 radially adjacent to the axis a may or may not reach the position of the axis a, i.e. several guide vanes 63 may or may not touch. The side of the guide vane 63 in the present embodiment, which is radially close to the axis a, does not reach the position of the axis a, i.e. the three guide vanes 63 do not contact. The structure of the deflector 63 is preferably capable of changing the direction of the gas, creating a rotational component.
Most of the area enclosed by the cyclonic channel 6, except for the deflector 63, is occupied by gas.
The cyclone channel 6 comprises a hollow annular wall surface 64 inside, the guide vane 63 is positioned in the wall surface 64, the wall surface 64 is provided with a clamping groove 641, the guide vane 63 is screwed into the corresponding clamping groove 641, one side of the cyclone channel 6 is provided with a pressing ring 62, and the pressing ring 62 can press the guide vane 63. The cooperation of draw-in groove 641 and clamping ring 62 can realize the spacing of water conservancy diversion piece 63, guarantees the stability of water conservancy diversion piece 63.
Three fixing holes 642 are formed in one side of the cyclone passage 6, the screws 61 are fitted into the fixing holes 642, and the pressing ring 62 is fixed to the cyclone passage 6 by the fitting of the fixing holes 642 and the screws 61.
The walls 64 are of equal diameter or radially expandable/contractible configuration along the axis a on the inside.
The slots 641 are also symmetrically disposed along the axis a, and the width of the slot 641 is greater on the outer diameter side than on the inner diameter side.
The working principle of the embodiment is as follows: during the large current period, the high-temperature gas from the arc area 3 is guided by the flow deflector 63 and rotates to enter the expansion chamber 5; during the zero crossing of the current, the cryogenic gas stored in the expansion chamber 5 is guided by the deflector 63 and swirls towards the arc zone 3. In the process of gas bidirectional flow, the flow velocity vector of the gas in the cyclone passage 6 has a rotation component besides the axial direction.
The movable contact 4, the arc burning ring, the cyclone passage 6 and the expansion chamber 5 of the embodiment are coaxially arranged, the cyclone passage 6 is arranged between the arc area 3 and the expansion chamber 5, hot gas entering the expansion chamber 5 from the arc area during large current is fully mixed with original cold air of the expansion chamber 5, so that the temperature of the expansion chamber 5 is not overhigh, and SF (sulfur hexafluoride) in the hot gas is promoted6The ionized products recombine to form a well-conditioned gas. During the current zero crossing, the well-conditioned gas in the expansion chamber 5 flows back to the arc region 3 in a form having a rotational component, which helps to cool and extinguish the arc. The two points are combined to act, and finally the medium recovery strength of the arc region after the current passes through zero is improved.
Example 2
As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the wall 64 is divided into a plurality of sections, each section and the corresponding deflector 63 form a member 72, at least two, in this embodiment three members 72 are spliced together to form the cyclonic duct 6. Thus, the installation, the disassembly and the replacement are convenient.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. Gas explosion chamber, its characterized in that: the gas-liquid separator comprises a first arc burning ring (1) and a second arc burning ring (2), wherein an arc area (3) is formed between the first arc burning ring (1) and the second arc burning ring (2), a cyclone channel (6) is arranged on one side of the arc area (3), and an expansion chamber (5) is arranged on one side of the cyclone channel (6); a moving contact (4) is arranged at the other side of the arc area (3), and at least one of the first arc burning ring (1) and the second arc burning ring (2) is in sliding contact with the moving contact (4);
a flow deflector (63) for changing the direction of the gas to form a rotation component is arranged in the cyclone channel (6).
2. Gas arc chute according to claim 1, characterized in that: the number of the guide vanes (63) is at least two.
3. Gas arc chute according to claim 1, characterized in that: the cyclone channel (6) is of a rotationally symmetrical structure as a whole, and the first arc combustion ring (1), the second arc combustion ring (2), the cyclone channel (6) and the expansion chamber (5) are coaxial A and are sequentially arranged along the axial A.
4. Gas arc extinguishing chamber according to claim 2, characterized in that: the surface of the guide vane (63) is a plane or a curved surface.
5. Gas arc extinguishing chamber according to claim 2, characterized in that: the tangent of the surface of the flow deflector (63) along the direction of the axis A forms an included angle with the axis A, and the included angle ranges from 0 degree to 45 degrees.
6. Gas arc extinguishing chamber according to claim 2, characterized in that: the space distance range between the tangent of the surface of the guide vane (63) perpendicular to the direction of the axis A and the axis A is 0-R/2, and R is the inner diameter of the cyclone channel (6).
7. Gas arc extinguishing chamber according to claim 2, characterized in that: the side of the guide vane (63) radially close to the axis A may or may not reach the position of the axis A.
8. Gas arc chute according to claim 1, characterized in that: the cyclone channel (6) comprises a hollow annular wall surface (64) inside, the flow deflector (63) is located in the wall surface (64), the wall surface (64) is provided with a clamping groove (641), the flow deflector (63) is screwed into the corresponding clamping groove (641), one side of the cyclone channel (6) is provided with a pressing ring (62), and the pressing ring (62) can press the flow deflector (63).
9. Gas arc chute according to claim 8, characterized in that: a plurality of fixing holes (642) are formed in one side of the cyclone channel (6), screws (61) are matched with the fixing holes (642), and the pressing ring (62) can be fixed on the cyclone channel (6) through the matching of the fixing holes (642) and the screws (61).
10. Gas arc chute according to claim 8, characterized in that: the clamping grooves (641) are distributed in a rotational symmetry mode, and the width of the outer diameter side of the notch of each clamping groove (641) is larger than that of the inner diameter side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308960.6A CN112331517B (en) | 2020-11-19 | 2020-11-19 | Gas arc extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308960.6A CN112331517B (en) | 2020-11-19 | 2020-11-19 | Gas arc extinguishing chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112331517A true CN112331517A (en) | 2021-02-05 |
| CN112331517B CN112331517B (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011308960.6A Active CN112331517B (en) | 2020-11-19 | 2020-11-19 | Gas arc extinguishing chamber |
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| CN (1) | CN112331517B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08315688A (en) * | 1995-05-22 | 1996-11-29 | Togami Electric Mfg Co Ltd | Breaker |
| CN1170948A (en) * | 1996-04-04 | 1998-01-21 | 亚瑞亚·勃朗勃威力有限公司 | Circuit breaker |
| CN1232279A (en) * | 1998-04-14 | 1999-10-20 | Abb研究有限公司 | Circuit breaker |
| US20060180576A1 (en) * | 2005-02-17 | 2006-08-17 | Abb Patent Gmbh | Electrical service device having an arc prechamber area, prechamber plates and a current -limiting arc-quenching device |
| CN101162662A (en) * | 2007-10-22 | 2008-04-16 | 沈阳工业大学 | Cyclone type nozzle high-pressure blowing circuit breakers with blades |
| 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 |
| CN102364656A (en) * | 2011-10-13 | 2012-02-29 | 沈阳工业大学 | Gas rotation energy separation type high-voltage SF6 circuit breaker and energy separation method thereof |
| CN102938349A (en) * | 2012-11-08 | 2013-02-20 | 上海思源高压开关有限公司 | High-voltage gas circuit breaker |
| KR20150001061U (en) * | 2013-09-02 | 2015-03-11 | 엘에스산전 주식회사 | Arc quenching unit for circuit breaker |
| KR20150144415A (en) * | 2014-06-16 | 2015-12-28 | 현대중공업 주식회사 | Gas isolated circuit breaker |
| CN105390335A (en) * | 2015-12-17 | 2016-03-09 | 中国西电电气股份有限公司 | Self-energy arc extinguishing chamber for increasing thermal expansion effect |
| CN208922988U (en) * | 2018-12-14 | 2019-05-31 | 西安西电电气研究院有限责任公司 | Self-energy extinguishing chamber and its arc extinguishing structure |
| CN111725024A (en) * | 2020-06-29 | 2020-09-29 | 西安西电开关电气有限公司 | High-voltage circuit breaker and arc extinguish chamber thereof |
-
2020
- 2020-11-19 CN CN202011308960.6A patent/CN112331517B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08315688A (en) * | 1995-05-22 | 1996-11-29 | Togami Electric Mfg Co Ltd | Breaker |
| CN1170948A (en) * | 1996-04-04 | 1998-01-21 | 亚瑞亚·勃朗勃威力有限公司 | Circuit breaker |
| CN1232279A (en) * | 1998-04-14 | 1999-10-20 | Abb研究有限公司 | Circuit breaker |
| US20060180576A1 (en) * | 2005-02-17 | 2006-08-17 | Abb Patent Gmbh | Electrical service device having an arc prechamber area, prechamber plates and a current -limiting arc-quenching device |
| CN101162662A (en) * | 2007-10-22 | 2008-04-16 | 沈阳工业大学 | Cyclone type nozzle high-pressure blowing circuit breakers with blades |
| 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 |
| CN102364656A (en) * | 2011-10-13 | 2012-02-29 | 沈阳工业大学 | Gas rotation energy separation type high-voltage SF6 circuit breaker and energy separation method thereof |
| CN102938349A (en) * | 2012-11-08 | 2013-02-20 | 上海思源高压开关有限公司 | High-voltage gas circuit breaker |
| KR20150001061U (en) * | 2013-09-02 | 2015-03-11 | 엘에스산전 주식회사 | Arc quenching unit for circuit breaker |
| KR20150144415A (en) * | 2014-06-16 | 2015-12-28 | 현대중공업 주식회사 | Gas isolated circuit breaker |
| CN105390335A (en) * | 2015-12-17 | 2016-03-09 | 中国西电电气股份有限公司 | Self-energy arc extinguishing chamber for increasing thermal expansion effect |
| CN208922988U (en) * | 2018-12-14 | 2019-05-31 | 西安西电电气研究院有限责任公司 | Self-energy extinguishing chamber and its arc extinguishing structure |
| CN111725024A (en) * | 2020-06-29 | 2020-09-29 | 西安西电开关电气有限公司 | High-voltage circuit breaker and arc extinguish chamber thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112331517B (en) | 2023-06-27 |
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