CN201201808Y - Shock tube-Laval nozzle apparatus for accelerating solid particle group - Google Patents
Shock tube-Laval nozzle apparatus for accelerating solid particle group Download PDFInfo
- Publication number
- CN201201808Y CN201201808Y CNU2008200868391U CN200820086839U CN201201808Y CN 201201808 Y CN201201808 Y CN 201201808Y CN U2008200868391 U CNU2008200868391 U CN U2008200868391U CN 200820086839 U CN200820086839 U CN 200820086839U CN 201201808 Y CN201201808 Y CN 201201808Y
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- China
- Prior art keywords
- laval nozzle
- powder
- chamber
- shock tube
- switch valve
- 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.)
- Expired - Lifetime
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- 230000035939 shock Effects 0.000 title claims abstract description 64
- 239000002245 particle Substances 0.000 title claims abstract description 50
- 239000007787 solid Substances 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 72
- 238000010586 diagram Methods 0.000 claims description 22
- 230000001052 transient effect Effects 0.000 claims description 20
- 230000008602 contraction Effects 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 31
- 230000033001 locomotion Effects 0.000 description 9
- 239000007921 spray Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010288 cold spraying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model discloses a shock tube-laval nozzle acceleration solid particle group device, wherein a compressed gas source is connected with a shock tube high pressure gas room via a compressed gas check valve, a powder room is formed by two movable baffle plates at two ends and a tube wall, while one baffle plate separates a low pressure gas room and the powder room and another baffle plate separates the powder room and the laval nozzle, the side wall of the powder room is provided with a particle inlet connected with a powder source, a powder path switch valve is arranged in the particle inlet for separating the powder source and the powder particles in the powder room, a control circuit board is respectively connected with an instant switch valve, a powder path switch valve and the two movable baffle plates. At the point of a powder extinguisher, the shock tube and the laval nozzle accelerate the solid particle group to increase the range of the extinguisher, and the expansion angle of the expansion section of the laval nozzle is increased to increase the injection area. The shock tube-laval nozzle acceleration solid particle group device has high extinguish efficiency, good effect, far range and saved power consumption. At the point of a ultrasonic quick-cooling spraying device, the shock tube-laval nozzle acceleration solid particle group device has high particle adhesive force and high coat strength.
Description
Technical field
The utility model relates to the acceleration feeding device of solid powder particle, especially relates to a kind of shock tube-Laval nozzle solid particle group accelerating device.
Background technology
Shock tube is one of generating means of motion shock wave and supersonic flow, Laval nozzle also can produce supersonic gas phase and flow, the high velocity air that utilizes them to produce is carried the accelerating solid particle secretly and is undoubtedly suitable actv. means, also can be implemented in the practical application in a lot of fields.With shock tube and Laval nozzle serial connection, bring into play the method that both acceleration transport the solid particle group function simultaneously, in the Chinese patent storehouse, do not appear in the newspapers yet." a kind of cold spraying use draw your nozzle of valve " that " shock-wave sand stone extinguishing cannon " that proposes as Chinese patent 200710016058.5 and Chinese patent 200710016442.5 propose just utilized shock tube and Laval nozzle to produce the function of supersonic airstream acceleration particle respectively.As fire extinguisher; have range far away relatively and bigger injection protection face; and, making the speed of solid powder particles acquisitions such as titanium, aluminium be higher than the critical speed that causes the high adhesive force of particle as the spray equipment that material surface is handled, these all are desirable.Adopt the ability of mono-shock tube or Laval nozzle solid particle group accelerating relatively limited in the existing technology, be difficult to make solid particle group to reach required quite high spray velocity.
Summary of the invention
For the restriction of the ability that overcomes single employing shock tube or Laval nozzle solid particle group accelerating, the purpose of this utility model is to provide a kind of shock tube-Laval nozzle solid particle group accelerating device, can be used for remote fire extinguishing or supersonic speed cold spraying.
The technical scheme that its technical matters that solves the utility model adopts is:
Comprise high-pressure air source, compressed gas cut-off valve separates the shock tube of forming by plenum chamber, low-pressure chamber by the transient state switch valve, the mill diagram switch valve, and for the powder source, storage powder chamber, two active clapboards and Laval nozzle; The compressed gas stop valve of compressed gas source links to each other with the shock tube plenum chamber, and storage powder chamber is surrounded by the active clapboard and the tube wall at two ends, and wherein a slice separates low-pressure chamber with storage powder chamber, and another sheet will store up the powder chamber and Laval nozzle separates; Sidewall in storage powder chamber is offered the particle filler opening and is connected for the powder source, and the mill diagram switch valve is set in the particle filler opening, will separate for the powder particle of powder source with storage powder chamber, and control circuit board is connected with transient state switch valve, mill diagram switch valve and two active clapboards respectively.
The cross sectional shape of described plenum chamber and Laval nozzle is circular.
The cross sectional shape of described low-pressure chamber and storage powder chamber is circle or rectangle.
Described Laval nozzle is the contracting expanding nozzle of a throat, and contraction section is a taper pipe, and expansion segment is the taper long tube with angle of flare, and contraction section length is less than expansion segment length.
Described high-pressure air source provides plenum chamber and has the high pressure tank of operation pressure of 0.2～5Mpa or the integral body of being made up of air compressor and storage tank.
The beneficial effect that the utlity model has is:
If the utility model is as powder fire extinguisher, because shock tube and Laval nozzle make the fire extinguisher range enough far away to the accelerating action of solid particle group simultaneously, add that the gradually wealthy section angle of flare of suitable increase Laval nozzle can increase the injection area coverage, have outstanding advantages such as fire-fighting efficiency height, effective, far firing range and energy savings compared to existing technology; If the utility model as the supersonic speed cold spray apparatus, also has remarkable advantages such as particle adhesion power is big, coating strength height.
Description of drawings
Accompanying drawing is a shock tube-Laval nozzle solid particle group accelerating device scheme drawing.
Among the figure: 1, high-pressure air source, 2, compressed gas cut-off valve, 3, plenum chamber, 4, the transient state switch valve, 5, low-pressure chamber, 6, the mill diagram switch valve, 7, for the powder source, 8, storage powder chamber, 9, active clapboard, 10, Laval nozzle, 11, control circuit board.
The specific embodiment
As shown in drawings, the utility model comprises high-pressure air source 1, compressed gas cut-off valve 2, separate the shock tube of forming by transient state switch valve 4 by plenum chamber 3, low-pressure chamber 5, mill diagram switch valve 6, for powder source 7, storage powder chamber 8, two active clapboards 9 and Laval nozzles 10; Compressed gas source 1 compressed gas stop valve 2 links to each other with shock tube plenum chamber 3, and storage powder chamber 8 is surrounded with tube wall by the active clapboard 9 at two ends, and wherein a slice separates low-pressure chamber 5 with storage powder chamber 8, and another sheet will store up powder chamber 8 and separate with Laval nozzle 10; Sidewall in storage powder chamber 8 is offered the particle filler opening and is connected for powder source 7, mill diagram switch valve 6 is set in the particle filler opening, to separate for the powder particle of powder source 7 with storage powder chamber 8, control circuit board 11 is connected with transient state switch valve 4, mill diagram switch valve 6 and two active clapboards 9 respectively.
The cross sectional shape of described plenum chamber 3 and Laval nozzle 10 is circular.
The cross sectional shape of described low-pressure chamber 5 and storage powder chamber 9 is circle or rectangle.Easy to process for active clapboard and mill diagram switch valve, cross section and axial dimension are determined according to factors such as practical application scale and particulate matter conveying capacities.
Described Laval nozzle 10 is contracting expanding nozzles of a throat, and contraction section is a taper pipe, and expansion segment is the taper long tube with angle of flare, and contraction section length is less than expansion segment length.
Described high-pressure air source 1 provides plenum chamber 3 and has the high pressure tank of operation pressure of 0.2～5Mpa or the integral body of being made up of air compressor and storage tank.
Principle of work of the present utility model is: store pressure gas in high-pressure air source, when compressed gas cut-off valve was opened, high pressure gas poured the plenum chamber of shock tube, were full of atmospheric air simultaneously in the low-pressure chamber of shock tube.Separate by the transient state switch valve between the plenum chamber of shock tube and the low-pressure chamber.When the transient state switch valve is opened, to set up in the shock tube to the shock wave of Laval nozzle Way out with the supersonic speed motion, the air-flow behind the shock wave is also made high-speed motion.Very short time (about 10 milliseconds) active clapboard before shock wave arrives storage powder chamber is opened, simultaneously, mill diagram switch valve closure, shock wave enters storage powder chamber, the indoor powder particle group of storage powder obtains initial momentum from shock wave, and high velocity air is carried accelerated movement down secretly behind ripple again.After arriving Laval nozzle, air-flow in nozzle passage, constantly quickens, can reach hypersonic up to nozzle exit, in this process, also constantly quickened, to such an extent as to also obtain quite high speed at nozzle exit by air-flow entrained solid particle swarm.
Carry out the transition to a low-pressure chamber 4 that sectional area is less by bigger plenum chamber 3 variable sections of sectional area in the utility model, separated by a transient state switch valve between plenum chamber and the low-pressure chamber, having formed provides the shock tube that quickens to transport solid particle group power.Wherein, the interface shape of low-pressure chamber 4 can be foursquare, and plenum chamber 3 adopts the bigger round section of sectional area, has the effect of steady pressure and stored-gas concurrently, is connected with low-pressure chamber by the linking section of cross sectional shape by circle change side.In low-pressure chamber, fill the atmosphere gas medium, and in plenum chamber, pour high pressure gas, adopt the gas with various medium according to concrete application need, adopt carbon dioxide, nitrogen etc. to suppress burning gases when being used to put out a fire, adopt unreactable gas such as helium etc. when being used to spray.The principle of shock tube is to utilize the strong discontinuity of gaseous tension in the pipe (the big pressure reduction of both sides, a certain interface) to bring out the shock wave in the medium, shock wave with supersonic speed to the low pressure lateral movement, originally be in the gas of meiobar and all rose unexpected height, and followed shock wave to the regional high-speed motion that still is in low pressure in strong disturbance downforce, the temperature of shock wave.Be full of the pressure gas that pressure is 0.2～5Mpa in the plenum chamber 3 of shock tube, be full of atmospheric air in the low-pressure chamber, separated by the transient state switch valve between the gentle plenum chamber of plenum chamber, the transient state switch valve can be realized the open and close controlling of transient state.When the transient state switch valve is opened, high pressure gas in the plenum chamber contact with air pressure gas in the low-pressure chamber, formed the pressure strong discontinuity on the contact surface, thereby brought out shock wave, and with of the end transmission of certain supersonic speed to low-pressure chamber, later owing to be subjected to the strong disturbance of shock wave, pressure, temperature raise suddenly gas in the low-pressure chamber, and follow shock wave to low-pressure chamber's right-hand member (end) high-speed motion at the shock wave warp.Shock tube low-pressure chamber is terminal is separated by an active clapboard with storage powder chamber, before high velocity air arrives storage powder chamber behind shock wave and ripple, active clapboard moment opens, after shock wave enters storage powder chamber, the gas in left side, storage powder chamber has become high pressure gas under shock-wave disturbance, storage right side, powder chamber gas still is in low-pressure state, the pressure reduction of both sides just provides initial momentum for solid particle group, the high velocity air that moves to storage powder chamber subsequently can constantly be quickened it by the entrained solids particle swarm again, and together to Laval nozzle 10 motions.Will be with respect to the back in the accelerator in the Laval nozzle 10, the one-level that is referred to as solid particle group is here quickened.
Laval nozzle 10 of the present utility model is contracting expanding nozzles that have throat, contraction section is short taper pipe, expansion segment is the taper long tube with certain angle of flare, and the size that nozzle is concrete and the angle of flare are determined by factors such as particulate matter conveying capacity, range and projected area.When shock wave moves to Laval nozzle 10 contraction sections, because the strong disturbance of shock wave, gas pressure value in the contraction section maintains quite high level in a period of time, and the later zone of shock wave still is in atmospheric pressure state, constantly quicken in whole Laval nozzle 10 in so big pressure ratio downstream, and reach certain supersonic speed at nozzle exit, under the carrying secretly of air-flow, solid particle group is also constantly quickened by air-flow, reach quite high speed up to nozzle exit, the secondary that this process is also referred to as solid particle group quickens.Subsequently, solid particle group is with air-flow target high speed jet outside nozzle together, thus the purpose that realization fire extinguishing or material surface cold spraying are handled.Consider the strong noise that the air-flow supersonic speed flows and follows, the outside face of Laval nozzle 10 need wrap up sound proofing material and greatly reduce noise.
High-pressure air source 1 of the present utility model is independent high pressure tank or the integral body of being made up of air compressor and storage tank, provide plenum chamber 3 to have the operation pressure of 0.2～5Mpa, the former is used for portable small-scale operation occasion, extensive operation occasions such as that the latter is used for is vehicle-mounted, aircraft carries are determined according to application scenario needs and device feature dimension.The plenum chamber 3 of high-pressure air source 1 and shock tube is by plumbing connection, and the two is separated by compressed gas cut-off valve 2, opens compressed gas cut-off valve 2, and pressure gas enters the plenum chamber of shock tube via pipeline, finishes the high pressure that shock wave forms and prepares.Solid particle group in storage powder chamber 8 from Laval nozzle 10 outlets fully injection, transient state switch valve 4 active clapboard 9 of having closed, stored up 8 both sides, powder chamber do not close, when the mill diagram switch valve is not opened, the low-pressure chamber 5 of shock tube is communicated with Laval nozzle 10 atmosphere outward, automatically charge into the air of atmospheric pressure state in the low-pressure chamber, finish the low pressure preparation that shock wave forms.
The active clapboard 9 of storage 8 both sides, powder chamber will store up powder chamber 8 and the shock tube low-pressure chamber 5 in left side and Laval nozzle 10 separations on right side respectively when the utility model is implemented, active clapboard 9 has the function that transient state opens and closes, principle of work is the same with transient state switch valve 4, plays sealing storage powder chamber 8 and above-mentioned compartmentation.The switching of active clapboard 9 is controlled by the pressure signal in the low-pressure chamber 5, and when the shock pressure forward reached near storage powder chamber front end, mill diagram switch valve 6 was closed, active clapboard 9 is opened, shock wave enters storage powder chamber 8, and when the pressure recovery normal pressure on the low-pressure chamber 5, active clapboard 9 is closed.
Link to each other by pipeline for powder source 7 and storage powder chamber 8 when the utility model is implemented, the two is by 6 separations of mill diagram switch valve.When active clapboard 9 is closed, open mill diagram switch valve 6, begin in storage powder chamber 8, to fill solid powder particles, after finishing, filling closes mill diagram switch valve 6.Mill diagram switch valve 6 has transient state and opens and closes function, its switching is controlled by the pressure signal in the low-pressure chamber 5, and when the shock pressure forward reached near storage powder chamber front end, mill diagram switch valve 6 was closed, when the pressure recovery normal pressure on the low-pressure chamber 5, mill diagram switch valve 6 is opened.
When implementing, the utility model carries out qi of chong channel ascending adversely repeatedly and deflation course for the shock tube plenum chamber that makes shock tube, thereby make the circulation of air-flow and particle swarm accelerated motion property performance period, to satisfy the needs of powder fire extinguisher or the automatic continuous working of supersonic speed cold spray apparatus, only need to make a control circuit board 11, make each step switch at interval and the following order cycle event: the unlatching of (1) compressed gas cut-off valve according to certain hour, (2) compressed gas cut-off valve is closed, (3) the transient state switch valve is opened, (4) the mill diagram switch valve is closed, (5) active clapboard is opened, (6) the transient state switch valve is closed, (7) active clapboard is closed, (8) the mill diagram switch valve is opened, repetitive operation (1)～(8).
Claims (5)
1. shock tube-Laval nozzle solid particle group accelerating device, it is characterized in that: comprise high-pressure air source (1), compressed gas cut-off valve (2), separate the shock tube of forming by plenum chamber (3), low-pressure chamber (5) by transient state switch valve (4), mill diagram switch valve (6), for powder source (7), storage powder chamber (8), two active clapboards (9) and Laval nozzle (10); The compressed gas stop valve of compressed gas source (1) (2) links to each other with shock tube plenum chamber (3), storage powder chamber (8) is surrounded with tube wall by the active clapboard (9) at two ends, wherein a slice separates low-pressure chamber (5) with storage powder chamber (8), and another sheet will store up powder chamber (8) and separate with Laval nozzle (10); Offer the particle filler opening and be connected at the sidewall of storage powder chamber (8) for powder source (7), mill diagram switch valve (6) is set in the particle filler opening, to separate for powder source (7) powder particle with storage powder chamber (8), control circuit board (11) is connected with transient state switch valve (4), mill diagram switch valve (6) and two active clapboards (9) respectively.
2. a kind of shock tube-Laval nozzle solid particle group accelerating device according to claim 1 is characterized in that: the cross sectional shape of described plenum chamber (3) and Laval nozzle (10) is for circular.
3. a kind of shock tube-Laval nozzle solid particle group accelerating device according to claim 1 is characterized in that: the cross sectional shape of described low-pressure chamber (5) and storage powder chamber (9) is circle or rectangle.
4. a kind of shock tube-Laval nozzle solid particle group accelerating device according to claim 1, it is characterized in that: described Laval nozzle (10) is the contracting expanding nozzle of a throat, contraction section is a taper pipe, expansion segment is the taper long tube with angle of flare, and contraction section length is less than expansion segment length.
5. a kind of shock tube-Laval nozzle solid particle group accelerating device according to claim 1 is characterized in that: described high-pressure air source (1) provides plenum chamber (3) and has the high pressure tank of operation pressure of 0.2～5Mpa or the integral body of being made up of air compressor and storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200868391U CN201201808Y (en) | 2008-05-20 | 2008-05-20 | Shock tube-Laval nozzle apparatus for accelerating solid particle group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200868391U CN201201808Y (en) | 2008-05-20 | 2008-05-20 | Shock tube-Laval nozzle apparatus for accelerating solid particle group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201201808Y true CN201201808Y (en) | 2009-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200868391U Expired - Lifetime CN201201808Y (en) | 2008-05-20 | 2008-05-20 | Shock tube-Laval nozzle apparatus for accelerating solid particle group |
Country Status (1)
| Country | Link |
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| CN (1) | CN201201808Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274710B (en) * | 2008-04-30 | 2011-02-02 | 浙江理工大学 | Solid particle group accelerating device for shock tube-Laval nozzle |
| CN104492013A (en) * | 2015-01-06 | 2015-04-08 | 余庆发 | Heightening ejector for fire device |
| CN106494891A (en) * | 2016-12-07 | 2017-03-15 | 河南理工大学 | A kind of mineral grain eddy flow air-transport system |
| WO2018182475A1 (en) * | 2017-03-29 | 2018-10-04 | Lifeng Wang | A compressed air artificial wind system and method thereof; firefighting equipment |
| CN110307241A (en) * | 2019-07-15 | 2019-10-08 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of shock tube anti-dropout big nut |
-
2008
- 2008-05-20 CN CNU2008200868391U patent/CN201201808Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101274710B (en) * | 2008-04-30 | 2011-02-02 | 浙江理工大学 | Solid particle group accelerating device for shock tube-Laval nozzle |
| CN104492013A (en) * | 2015-01-06 | 2015-04-08 | 余庆发 | Heightening ejector for fire device |
| CN106494891A (en) * | 2016-12-07 | 2017-03-15 | 河南理工大学 | A kind of mineral grain eddy flow air-transport system |
| WO2018182475A1 (en) * | 2017-03-29 | 2018-10-04 | Lifeng Wang | A compressed air artificial wind system and method thereof; firefighting equipment |
| EP3600573A4 (en) * | 2017-03-29 | 2020-12-16 | Lifeng Wang | A compressed air artificial wind system and method thereof; firefighting equipment |
| US11224172B2 (en) | 2017-03-29 | 2022-01-18 | LiFeng Wang | Compressed air artificial wind system and method thereof, firefighting equipment |
| CN110307241A (en) * | 2019-07-15 | 2019-10-08 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of shock tube anti-dropout big nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090304 Effective date of abandoning: 20080520 |