CN104299841B - Arc-chutes and use the chopper of this mechanism - Google Patents
Arc-chutes and use the chopper of this mechanism Download PDFInfo
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- CN104299841B CN104299841B CN201410170496.7A CN201410170496A CN104299841B CN 104299841 B CN104299841 B CN 104299841B CN 201410170496 A CN201410170496 A CN 201410170496A CN 104299841 B CN104299841 B CN 104299841B
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- arc
- contact
- chutes
- main contact
- extinguishing mechanism
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- 230000003068 static effect Effects 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000001360 synchronised effect Effects 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims description 24
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 20
- 238000010891 electric arc Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/904—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism characterised by the transmission between operating mechanism and piston or movable contact
-
- 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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The present invention relates to high-voltage switch gear field, especially related to a kind of arc-chutes and used the chopper of this mechanism.Arc-chutes have axially disposed two exit, it includes main contact, arcing contact and arc-extinguishing mechanism, main contact includes dynamic main contact and quiet main contact, arcing contact includes moving arcing contact and static arc contact, one or two in dynamic main contact, moving arcing contact and arc-extinguishing mechanism is located at an exit of arc-chutes, remaining is located at another exit of arc-chutes, and described arc-extinguishing mechanism, dynamic main contact and moving arcing contact Synchronous Transmission connect.Present invention achieves and arc-chutes internal moving parts is split to two exits, the arc-chutes of the present invention obviously can simplify the structure of former movable end of arc extinguishing chamber, solving the baroque problem in one end of existing arc-chutes, arc-extinguishing mechanism, dynamic main contact and moving arcing contact Synchronous Transmission being connected is to realize being precisely controlled they running orders and time point.
Description
Technical field
The present invention relates to high-voltage switch gear field, especially related to a kind of arc-chutes and used the chopper of this mechanism.
Background technology
Chopper is a kind of switchgear extremely common in high-voltage electric power system, and arc-chutes are as the core of chopper, and it directly affects the performance of chopper, service life and the adaptability to installation environment.
The critical piece of arc-chutes has main contact (for the break-make of circuit), arcing contact (being used for protecting main contact), spout and the arc-extinguishing mechanism (mainly for the protection of arcing contact) being arranged in pairs, and wherein arc-extinguishing mechanism includes cylinder and piston.During chopper works; arcing contact prior to main contact close a floodgate, after in main contact separating brake; thus playing the effect of protection main contact, arc-extinguishing mechanism reaches to blow out electric arc, protection arcing contact or even the effect of arc-chutes by the relative motion between its piston and cylinder.
Notification number be CN202102959U Chinese patent disclosed in arc-extinguishing chamber of circuit breaker be one common in arc-chutes, in these arc-chutes, main contact is divided into the dynamic main contact and quiet main contact being coaxially disposed, dynamic main contact includes moved end conductor, quiet main contact includes quiet end conductor, fix on the conductor of moved end and be equipped with grafting conductor, arcing contact is divided into moving arcing contact and static arc contact, arc-extinguishing mechanism includes air cylinder and piston, wherein move main contact, moved end conductor, grafting conductor, spout and piston are each attached to together and connect have connecting rod, connecting rod is for being in transmission connection to drive arc-chutes divide-shut brake with corresponding operating mechanism.During combined floodgate, quiet main contact and static arc contact all maintain static, order about arc-chutes by corresponding operating mechanism and connecting rod to close a floodgate, dynamic main contact is by its grafting conductor and quiet main contact grafting, the servo-actuated main contact of moving arcing contact moves and static arc contact grafting together, in the process, the servo-actuated main contact of piston is the most movable；During separating brake, being still and order about dynamic main contact by connecting rod and separate with quiet main contact, order about moving arcing contact and separate with static arc contact, when moving arcing contact separates with static arc contact, piston and air cylinder fit through spout and the incision position of dynamic and static arcing contact are carried out arc blow-out arc extinguishing.
In above-mentioned arc-extinguishing chamber of circuit breaker, connecting rod is that the piston with arc-extinguishing mechanism is connected, and at some in other chopper, the situation that also connecting rod is connected with the air cylinder of arc-extinguishing mechanism, it will not go into details herein.But, no matter it is the structure using connecting rod to be connected with piston, or use the structure that connecting rod is connected with air cylinder, the movable part of arc-extinguishing mechanism, main contact, arcing contact etc. is all integrally fixed at together, and the above-mentioned parts being fixed together are to move simultaneously, then it is necessary to have enough spaces, this allows for, and the structure of movable end of arc extinguishing chamber is excessively complicated, profile is the most too fat to move, it is unfavorable for reducing arc-chutes are radial dimension of, and then limits the mounting location of chopper.
Summary of the invention
It is an object of the invention to provide a kind of arc-chutes, to solve the baroque problem in one end of existing arc-chutes.
Meanwhile, the present invention also aims to provide the chopper using above-mentioned arc-chutes.
In order to solve the problems referred to above, arc-chutes are by the following technical solutions: arc-chutes, these arc-chutes have axially disposed two exit, it includes main contact, arcing contact and arc-extinguishing mechanism, main contact includes dynamic main contact and quiet main contact, arcing contact includes moving arcing contact and static arc contact, one or two in described dynamic main contact, moving arcing contact and arc-extinguishing mechanism is located at an exit of arc-chutes, remaining is located at another exit of arc-chutes, and described arc-extinguishing mechanism, dynamic main contact and moving arcing contact Synchronous Transmission connect.
Being positioned at two of the same exit of arc-chutes in described arc-extinguishing mechanism, dynamic main contact and moving arcing contact connect by Synchronous Transmission fastened to each other and be connected by peripheral connecting rod Synchronous Transmission with another, periphery connecting rod is located at arc-extinguishing mechanism, at the radial outer periphery of moving main contact and moving arcing contact.
Described dynamic main contact and moving arcing contact are located at the same exit of arc-chutes, and arc-extinguishing mechanism is located at another exit of arc-chutes, and arc-extinguishing mechanism connects center rod, and center rod is connected with peripheral connecting rod Synchronous Transmission.
It is fixed together by the union joint being radially arranged along arc-chutes between described center rod and peripheral connecting rod.
Described each exit is equipped with a corresponding radome.
Chopper adopts the following technical scheme that chopper, including arc-chutes, arc-chutes have axially disposed two exit, it includes main contact, arcing contact and arc-extinguishing mechanism, main contact includes dynamic main contact and quiet main contact, arcing contact includes moving arcing contact and static arc contact, one or two in described dynamic main contact, moving arcing contact and arc-extinguishing mechanism is located at an exit of arc-chutes, remaining is located at another exit of arc-chutes, and described arc-extinguishing mechanism, dynamic main contact and moving arcing contact Synchronous Transmission connect.
Being positioned at two of the same exit of arc-chutes in described arc-extinguishing mechanism, dynamic main contact and moving arcing contact connect by Synchronous Transmission fastened to each other and be connected by peripheral connecting rod Synchronous Transmission with another, periphery connecting rod is located at arc-extinguishing mechanism, at the radial outer periphery of moving main contact and moving arcing contact.
Described dynamic main contact and moving arcing contact are located at the same exit of arc-chutes, and arc-extinguishing mechanism is located at another exit of arc-chutes, and arc-extinguishing mechanism connects center rod, and center rod is connected with peripheral connecting rod Synchronous Transmission.
It is fixed together by the union joint being radially arranged along arc-chutes between described center rod and peripheral connecting rod.
Described each exit is equipped with a corresponding radome.
Dynamic main contact due to these arc-chutes, one or two in moving arcing contact and arc-extinguishing mechanism is located at an exit of arc-chutes, remaining is located at another exit of arc-chutes, this actually achieves and splits arc-chutes internal moving parts to two exits, compared with in existing arc-chutes, moving component all concentrates on the structure of moved end, the arc-chutes of the present invention obviously can simplify the structure of former movable end of arc extinguishing chamber, the most also (the quiet end of former arc-chutes is the most fairly simple will to bring the biggest burden to the quiet end of arc-chutes, and owing to mate with moved end, it is bigger that its volume designs, the problem that there is segment space waste).In sum, these arc-chutes solve the baroque problem in one end of existing arc-chutes.Arc-extinguishing mechanism, dynamic main contact and moving arcing contact Synchronous Transmission being connected is to realize being precisely controlled they running orders and time point.
Further, radome may be used for shielding the exit of arc-chutes.
Accompanying drawing explanation
Fig. 1 is the front view of the embodiment of arc-chutes, and this accompanying drawing is also the front view of the arc-chutes in the embodiment of chopper simultaneously；
Fig. 2 is the top view of the embodiment of arc-chutes, and this accompanying drawing is also the top view of the arc-chutes in the embodiment of chopper simultaneously；
Fig. 3 is the left view of the embodiment of arc-chutes, and this accompanying drawing is also the left view of the arc-chutes in the embodiment of chopper simultaneously；
Fig. 4 is that the A-A of Fig. 1 is to sectional view；
Fig. 5 is that the B-B of Fig. 2 is to sectional view；
Fig. 6 is that the C-C of Fig. 5 is to sectional view.
Detailed description of the invention
The embodiment of arc-chutes, as shown in figures 1 to 6, these arc-chutes have axially disposed two exit, two exits are connected for two ends with circuit incision position respectively, each exit is equipped with a corresponding radome 11, and radome 11 is for shielding the external insulation structure at arc-chutes respective end.
In the present embodiment, radome 11 is cylindrical and has bracing frame 12 in mounted inside, all fix on the bracing frame 12 of each radome 11 and be equipped with corresponding leading body, in the present embodiment, leading body is the most cylindrical and is coaxially disposed, for the ease of distinguishing, in two leading bodies being referred to as the first conductor 13, another is referred to as the second conductor 14 herein.
Dynamic main contact 15 and moving arcing contact 16 it is equipped with on first conductor 13, dynamic main contact 15 is cylindrical and be male contact, it is the most mobilizable is assemblied in the first conductor 13, and the first conductor 13 is conductively connected with the holding of dynamic main contact 15 by annular fingertip 17 set in inner wall surface thereof.In order to ensure dynamic axiality between main contact 15 and the first conductor 13, the internal face of the first conductor 13 further respectively having interior guide ring 18 at the axial both sides of annular fingertip 17, this interior guide ring 18 is double guide rings.In order to avoid dynamic main contact 15 and the first conductor 13 are burnt out by electric arc, their internal face further respectively has steel lining.Moving arcing contact 16 is positioned in dynamic main contact 15 and is coaxially disposed with dynamic main contact 15, and in the present embodiment, moving arcing contact 16 uses tubular structure in order to the pressure of spout (hereafter can mention) when reducing arc-chutes separating brake, thus reduces operating work.
Fix on second conductor 14 and be equipped with quiet main contact 19, static arc contact 20, spout and arc-extinguishing mechanism.Quiet main contact 19 is securely fitted in the end near the first conductor 13 of the second conductor 14, it is the most cylindrical and be the female contact corresponding with dynamic main contact 15, static arc contact 20 is coaxially fixedly arranged in quiet main contact 19, and it is the female contact corresponding with moving arcing contact 16.Spout is divided into one-level spout 21 and two grades of spouts 22, and one-level spout 21 is positioned in static arc contact 20, and spray orifice thereon is threaded hole, and in order to be sprayed in a rotative pattern by arc extinguishing gases, thus assistant electric arc extinguishes, and two grades of spouts 22 are fixed at the respective end of the second conductor 14.Arc-extinguishing mechanism includes piston 23 and cylinder 24, cylinder 24 is coaxially fixedly arranged in the second conductor 14, piston 23 is positioned at the side deviating from dynamic main contact 15 of quiet main contact 19, have on piston 23 axially through intercommunicating pore and near quiet main contact side at be provided with valve block 25, when piston moves to quiet main contact 19, then intercommunicating pore is blocked by valve block 25, thus can be pressurizeed by piston 23, when piston 23 is in time moving away from quiet main contact 19, then valve block 25 loses the plugging action to intercommunicating pore, thus is available for the light movement of piston 23.In order to avoid electric arc enters cylinder 24 ablation piston 23 during combined floodgate, reclosing, preventing piston 23 from being burnt out by electric arc near the side of quiet main contact 19, the side of the close quiet main contact 19 of piston 23 is provided with steel piston head 26.It addition, in order to increase the sealing between itself and cylinder body in the case of reducing frictional resistance when piston moves as far as possible, the outside of piston 23 is also fixing is equipped with outer seal ring 27, and the outer ring surface of outer seal ring 27 is provided with co-axial groove structure.
Dynamic main contact 15, moving arcing contact 16 and arc-extinguishing mechanism are all that Synchronous Transmission links together.In the present embodiment, the piston 23 of arc-extinguishing mechanism connects center rod 28, dynamic main contact 15 connects peripheral connecting rod 29, peripheral connecting rod 29 is positioned at dynamic main contact 15, at the radial outer periphery of moving arcing contact 16 and arc-extinguishing mechanism and parallel to each other with center rod 28, wherein peripheral connecting rod 29 is connected with center rod 28 Synchronous Transmission away from one end of dynamic main contact 15, in the present embodiment, Synchronous Transmission connection between them is dependent on realization fastened to each other, the two is fixed particular by a union joint 30, union joint 30 is radially arranged along arc-chutes, its concrete shape is arc, peripheral pull bar 29 is positioned at the side on union joint 30 away from inner concave arc surface, center pull rod 29 is positioned at the inner concave arc surface side of union joint 30.In the present embodiment, the union joint of same exit has two, and these two union joints are uniformly distributed along the circumference of cylinder；In other embodiments, the union joint of same exit can also have two or more, plural union joint to be uniformly distributed along the circumference of cylinder；In other embodiments, the union joint of same exit can also be one, and now, union joint is circular.Peripheral pull bar 29 is thin pull bar, and is insulant, and the peripheral pull bar 29 on each union joint 30 has four, and these four peripheral pull bars 29 are along the circumferentially-spaced distribution of union joint 30；In other embodiments, each union joint upper connecting rod can also be two or three or more than five.
In use, center rod (or peripheral connecting rod, union joint) can be connected with corresponding operating mechanism, during combined floodgate, center rod and peripheral connecting rod are synchronized with the movement, center rod pulls piston to move to the direction away from quiet main contact, and peripheral connecting rod pulls dynamic main contact and moving arcing contact close to quiet main contact and static arc contact simultaneously, until moving arcing contact is first and static arc contact grafting, with quiet main contact grafting after dynamic main contact, then arc-chutes complete to close a floodgate；During separating brake, peripheral connecting rod drives dynamic main contact and moving arcing contact to move to the direction away from quiet main contact and static arc contact under the effect of operating mechanism, meanwhile, center rod is ordered about piston and is moved to the direction near quiet main contact and compress arc extinguishing gases, until after dynamic main contact separates with quiet main contact, when moving arcing contact separates with static arc contact, the arc extinguishing gases of piston compression is via one-level, two grades of spout ejections, blow out the electric arc produced when moving arcing contact separates with static arc contact, thus complete the separating brake of arc-chutes.
In the other embodiments of arc-chutes, arc-extinguishing mechanism can also be connected with center rod by its cylinder, or is respectively provided with corresponding connecting rod on the cylinder and piston of arc-extinguishing mechanism, thus drives cylinder and piston relative motion；Arc-extinguishing mechanism and dynamic main contact can also be located at the same exit of arc-chutes, moving arcing contact is located at another exit of arc-chutes, or arc-extinguishing mechanism and moving arcing contact are located at the same exit of arc-chutes, dynamic main contact is located at another exit of arc-chutes；Synchronous Transmission between center rod and peripheral connecting rod can also be realized by pinion and rack.
The embodiment of chopper, as shown in figures 1 to 6, this chopper includes arc-chutes, and the structure of arc-chutes is identical with the structure of the embodiment of above-mentioned arc-chutes, and it will not go into details herein.
Claims (4)
1. arc-chutes, these arc-chutes have axially disposed two exit, it includes main contact, arcing contact and arc-extinguishing mechanism, main contact includes dynamic main contact and quiet main contact, arcing contact includes moving arcing contact and static arc contact, it is characterized in that, described dynamic main contact and moving arcing contact are located at the same exit of arc-chutes, arc-extinguishing mechanism is located at another exit of arc-chutes, move main contact and moving arcing contact is fastened to each other and is connected by peripheral connecting rod Synchronous Transmission with arc-extinguishing mechanism, arc-extinguishing mechanism is located at by peripheral connecting rod, at the radial outer periphery of dynamic main contact and moving arcing contact, the piston of arc-extinguishing mechanism connects center rod, the cylinder of arc-extinguishing mechanism is fixing with quiet main contact to be connected, it is fixed together by the union joint being radially arranged along arc-chutes between described center rod and peripheral connecting rod.
Arc-chutes the most according to claim 1, it is characterised in that: each described exit is equipped with a corresponding radome.
3. chopper, including arc-chutes, arc-chutes have axially disposed two exit, it includes main contact, arcing contact and arc-extinguishing mechanism, main contact includes dynamic main contact and quiet main contact, arcing contact includes moving arcing contact and static arc contact, it is characterized in that, described dynamic main contact and moving arcing contact are located at the same exit of arc-chutes, arc-extinguishing mechanism is located at another exit of arc-chutes, move main contact and moving arcing contact is fastened to each other and is connected by peripheral connecting rod Synchronous Transmission with arc-extinguishing mechanism, arc-extinguishing mechanism is located at by peripheral connecting rod, at the radial outer periphery of dynamic main contact and moving arcing contact, the piston of arc-extinguishing mechanism connects center rod, the cylinder of arc-extinguishing mechanism is fixing with quiet main contact to be connected, it is fixed together by the union joint being radially arranged along arc-chutes between described center rod and peripheral connecting rod.
Chopper the most according to claim 3, it is characterised in that each described exit is equipped with a corresponding radome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170496.7A CN104299841B (en) | 2014-04-25 | 2014-04-25 | Arc-chutes and use the chopper of this mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410170496.7A CN104299841B (en) | 2014-04-25 | 2014-04-25 | Arc-chutes and use the chopper of this mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104299841A CN104299841A (en) | 2015-01-21 |
| CN104299841B true CN104299841B (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410170496.7A Active CN104299841B (en) | 2014-04-25 | 2014-04-25 | Arc-chutes and use the chopper of this mechanism |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299840B (en) * | 2014-04-25 | 2017-01-04 | 国家电网公司 | Arc-chutes and use the chopper of this mechanism |
| CN110112033A (en) * | 2019-05-08 | 2019-08-09 | 沈阳工业大学 | A kind of arcing contact and application method with auxiliary piston |
| CN110993431B (en) * | 2019-10-31 | 2022-06-28 | 特变电工中发上海高压开关有限公司 | Novel arc extinguishing contact structure of high-voltage switch SF6 gas arc extinguishing chamber |
| CN112735901B (en) * | 2020-12-01 | 2023-02-17 | 平高集团有限公司 | Vacuum arc-extinguishing chamber with composite contact structure |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3896282A (en) * | 1973-05-25 | 1975-07-22 | S & C Electric Co | High voltage circuit interrupting device |
| CH618287A5 (en) * | 1977-07-26 | 1980-07-15 | Sprecher & Schuh Ag | Gas-blast circuit breaker |
| FR2596574B1 (en) * | 1986-04-01 | 1988-05-20 | Alsthom | HIGH VOLTAGE CIRCUIT BREAKER WITH DIELECTRIC GAS UNDER PRESSURE |
| CH675175A5 (en) * | 1987-10-27 | 1990-08-31 | Bbc Brown Boveri & Cie | |
| FR2783088B1 (en) * | 1998-09-09 | 2000-10-13 | Alstom Technology | SWITCH WITH A LONG-TERM INSERTION RESISTOR INSERTION SYSTEM |
| JP5178644B2 (en) * | 2009-06-29 | 2013-04-10 | 株式会社東芝 | Gas circuit breaker with input resistance contact and its input / output method |
| KR101460299B1 (en) * | 2010-10-04 | 2014-11-11 | 현대중공업 주식회사 | Gas Insulated Circuit-breaker using gas vent guide |
| CN202102959U (en) * | 2011-06-01 | 2012-01-04 | 厦门华电开关有限公司 | Circuit breaker arc-extinguishing chamber |
| CN104299840B (en) * | 2014-04-25 | 2017-01-04 | 国家电网公司 | Arc-chutes and use the chopper of this mechanism |
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2014
- 2014-04-25 CN CN201410170496.7A patent/CN104299841B/en active Active
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| CN104299841A (en) | 2015-01-21 |
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