CN103775734B - Gas drainage pipeline system construction method under large-diameter well - Google Patents
Gas drainage pipeline system construction method under large-diameter well Download PDFInfo
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- CN103775734B CN103775734B CN201310747888.0A CN201310747888A CN103775734B CN 103775734 B CN103775734 B CN 103775734B CN 201310747888 A CN201310747888 A CN 201310747888A CN 103775734 B CN103775734 B CN 103775734B
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000002474 experimental method Methods 0.000 claims abstract description 5
- 239000010425 asbestos Substances 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 claims abstract description 3
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 239000003755 preservative agent Substances 0.000 claims abstract description 3
- 230000002335 preservative effect Effects 0.000 claims abstract description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 238000013461 design Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 12
- 230000032258 transport Effects 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 210000004209 hair Anatomy 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000000725 suspension Substances 0.000 abstract description 6
- 239000003245 coal Substances 0.000 abstract description 5
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 4
- 241000233855 Orchidaceae Species 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Sewage (AREA)
- Pipeline Systems (AREA)
Abstract
The present invention relates to a kind of gas tube construction method, gas drainage pipeline system construction method under specially a kind of large-diameter well.The technical issues of solving the suspension construction of gas tube, method is the preparation before construction, surveying setting-out first, then steel pipe pipeline section or pipe fitting both ends are burn-on flange on well, carry out preservative treatment, underground infield is delivered to by mine car, pipeline section is promoted to mounting height using jack, pipeline section is suspended under prior mounted anchor pole or anchor cable with steel wire rope and strainer, it is fastened by bolts centre and is lined with the adjacent tubular segments of asbestos rubber pad or the flange of pipe fitting or valve, achieve the effect that sealing, last pipeline pressure experiment, trial operation, handing-over.Method of the present invention provides standard set coal mine roadway gas pipe suspension pipeline construction method, solves the technical issues of existing gas tube system influences bottom surface equipment and current personnel mounted on ground.
Description
Technical field
The present invention designs a kind of gas tube construction method, and gas drainage pipeline system is applied under specially a kind of large-diameter well
Work method.
Background technology
As country is to the pay attention to day by day of safety in production, more and more coal mines carry out safety in production technological transformation project, gas
Improvement is the major tasks in coal mining, and it is one of effective measures that gas pre-drainage, which is put,.The major way that gas pre-drainage is put is logical
It crosses a large amount of gas tube and concentrates the gas in working face and transfer out.Traditional gas drainage pipeline system is by pipeline
On the bracket away from tunnel ground 500mm high, lane space inherently at full stretch is occupied.In coal mine roadway also
Many machineries, vehicle and walkway are arranged, therefore actually other constructions bring certain resistance to gas tube to tunnel
Hinder, therefore it is contemplated that by lifting pipeline in tunnel upper space, make tunnel lower part can be with personnel and vehicle pass-through.
Invention content
The technical issues of present invention is in order to solve the suspension of gas tube construction provides a kind of heavy caliber fire damp and takes out
Put pipe-line system construction method.
The technical scheme is that a kind of gas drainage pipeline system construction method under large-diameter well,
Then preparation before construction, first surveying setting-out burn-on steel pipe pipeline section or pipe fitting both ends flange on well, carry out
Preservative treatment, underground infield is delivered to by mine car, pipeline section is promoted to mounting height using jack, with steel wire rope and drawing
Pipeline section is suspended under prior mounted anchor pole or anchor cable by tight device, is fastened by bolts centre and is lined with the adjacent of asbestos rubber pad
The flange of pipeline section or pipe fitting or valve achievees the effect that sealing, last pipeline pressure experiment, trial operation, handing-over.
Gas drainage pipeline system construction method, specifically comprises the following steps under a kind of large-diameter well：
1 surveying setting-out
Before anchor pole, anchor cable construction, unwrapping wire need to be measured by design, first determines that pipeline is specific according to design requirement before unwrapping wire
Then position carries out unwrapping wire according to the datum line provided in ore deposit.During unwrapping wire using datum line and two intersect datum lines intersection point as according to
According to the intersection point of the right-angled intersection point alignment fiducials line of laser level and making two cross hairs with intersecting benchmark line overlap, so
Push up the crosspoint for measuring and orienting pipeline in tunnel with tape measure afterwards.With this crosspoint cooperation laser level, it is mining directly to instrument,
Engineering cotton rope carries out unwrapping wire, after determining pipeline line position, is measured with tape measure, and every 3 meters are pushed up in tunnel with paint（Anchor pole position）
And every 12 meters（Anchor cable position）It makes marks, with this alternately unwrapping wire；
2 pipeline sections, pipe fitting processing
According to underground survey data, the processing work of elbow is carried out on well, one end of elbow or threeway uses kink method
Orchid, when connecting slag-discharging device, tailrace and valve, pipeline section end should also use lap joint flange；
3 pipelines transport
When pipeline ships, 3 are filled with flat car encapsulation per car, flower column vehicle or the mine car such as threeway, pipe nipple, elbow of processing
Shipment, with φ 12.5mm steel wire ropes and rope card envelope vehicle, jail is covered in pipeline both sides with timber wedge, with crowbar in haulage vehicle both ends steel wire rope
Simultaneously fixation is tightened, and is tightened at steel wire rope knotting with 8# iron wires, pipeline both ends are protected with plank, to prevent breaking
Other objects；During entrucking, the center of gravity of pipeline will be consistent with the center of gravity of vehicle；Pipeline is transported to specified ground by ore deposit transport team
Then point arranges personnel to transport to job location, scatters by erection sequence by unit in charge of construction；During gallery cart, primary standard pushes away one
Vehicle, and in both ends cart, the spacing of cart in the same direction when track grade is less than or equal to 5 ‰, cannot be less than 10 meters, the gradient is big
When 5 ‰, 30 meters are cannot be less than；
4th, lifting pipeline, connection
During lifting pipeline, the appropriate selecting pipe of power is born according to the maximum hoisting weight and anchor pole of jack, the maximum of anchor cable
Road radical；Before lifting, jack is first fixed on anchor cable, the pipe ends connected are fixed with jack, during lifting, first
Pipeline pull-up ground 200mm is waited for 3 minutes, it is ensured that recurrence is hung to design height after safety, when forgetting about it chain, it is to be ensured that fall at both ends
Chain uniformly lifts by crane, and after the completion of lifting, pipeline is fixed with corresponding steel wire rope, rope card and strainer,
The hanging of gas pipeline is using the wire rope hanging of φ 12.5-6*19, and hanging spacing is 3 meters, and hanging position is located at
Line connection, when gas pipeline is hung, sling point must hang two rope cards, pipeline installation on each sling point on anchor disk
Gradient deviation is no more than the 1/3 of design, and pipeline is mounted on position in gallery and hangs down with stringcourse away from tolerance ± 30mm.
5th, connecting pipe flange, pipeline pressure experiment, trial operation, handing-over.
Method of the present invention provides standard set coal mine roadway gas pipe suspension pipeline construction method, solves existing
There is gas tube system to be mounted on the technical issues of ground influences bottom surface equipment and current personnel.
Description of the drawings
Fig. 1 is the construction method design sketch of the present invention
1- anchor poles or anchor cable 2- strainer 3- steel wire rope 4- gas tube 5- tunnels in figure.
Specific embodiment
A kind of gas drainage pipeline system construction method under large-diameter well,
1 surveying setting-out
Before anchor pole, anchor cable construction, unwrapping wire need to be measured by design, first determines that pipeline is specific according to design requirement before unwrapping wire
Then position carries out unwrapping wire according to the datum line provided in ore deposit.During unwrapping wire using datum line and two intersect datum lines intersection point as according to
According to the intersection point of the right-angled intersection point alignment fiducials line of laser level and making two cross hairs with intersecting benchmark line overlap, so
Push up the crosspoint for measuring and orienting pipeline in tunnel with tape measure afterwards.With this crosspoint cooperation laser level, it is mining directly to instrument,
Engineering cotton rope carries out unwrapping wire, after determining pipeline line position, is measured with tape measure, and every 3 meters are pushed up in tunnel with paint（Anchor pole position）
And every 12 meters（Anchor cable position）It makes marks, with this alternately unwrapping wire；
2 pipeline sections, pipe fitting processing
Underworkings height rises and falls, is winding, is needed in construction using many elbows, since underground does not allow to carry out
Electricity, gas welding operation, the processing work needs of elbow are completed on well.
According to underground survey data, the processing work of elbow is carried out on well, one end of elbow or threeway uses kink method
Orchid, when connecting slag-discharging device, tailrace and valve, pipeline section end should also use lap joint flange；
3 pipelines transport
3.1st, when pipeline ships, 529 tunnels of φ encapsulate per car with flat car and fill 3, the use such as threeway, pipe nipple, elbow of processing
Flower column vehicle or mine car shipment, with φ 12.5mm steel wire ropes and rope card envelope vehicle, jail is covered in pipeline both sides with timber wedge, with crowbar in transport vehicle
Both ends steel wire rope is tightened and fixation, and is tightened at steel wire rope knotting with 8# iron wires, and pipeline both ends are carried out with plank
Protection, to prevent breaking other objects；
3.2nd, during entrucking, the center of gravity of pipeline will be consistent with the center of gravity of vehicle；
3.3rd, pipeline is transported to appointed place by ore deposit transport team, then personnel is arranged to beat by unit in charge of construction and transport to construction ground
Point, scatters by erection sequence；
3.4th, during gallery cart, primary standard pushes away a vehicle, forbids in vehicle both sides cart；The spacing of cart in the same direction, it is in-orbit
When the road gradient is less than or equal to 5 ‰, 10 meters are cannot be less than, when the gradient is more than 5 ‰, cannot be less than 30 meters.
3.5th, when roadway gradient is more than 7 ‰, forbid hutching.
3.6th, must pay attention to front during cart the moment, start cart, stop, slide down, find in front of someone or have obstacle
During object, from the larger downward cart in place of the gradient and close to when track switch, bend, access adit, air door, chamber outlet, trammer
Warning signal must be sent out in time.
3.7th, forbid not charged loose vehicle when winch beats fortune and let vehicle fly away.
3.8th, oblique lane transport will carry out following several respects work.
1) winch sound and light signal must be complete intact on the way for inclined gallery.
2) " slope three is kept off " wants complete intact.
3) pin, ring chain, gib head, safety rope have to comply with regulation.
4) drumman, signalman, cager must take appointment with certificate.
5) oblique lane transport strict implement " pedestrian, pedestrian do not drive a vehicle for driving " system.
6) drumman is before driving, it is necessary to check winch take root whether securely, whether damper brake, clutch sensitive can
Lean on, whether fracture of wire transfinites or has knotting phenomenon, operation button intact etc. steel wire rope, timely processing of pinpointing the problems is forbidden to twist
Vehicle " in spite of illness " operation.
7) whether cager should check whether envelope vehicle is secured before winch startup, have barrier, chain turner tool to be on track
It is no complete, intact, timely processing of pinpointing the problems.
8) drumman will accomplish slow start, middling speed operation, steady parking when starting winch.
9) forbid super trailer.
10) for vehicle before inclined gallery are not entered, " slope three is kept off " should be at closed state.
11) when vehicle slides down in inclined gallery, forbid winch hard draw rerail, when finding that vehicle slides down, cager joins in time
It is drumman parking, then slowly steel wire rope is tensed and tight brake of stopping, disengaging winch drag brake handle is not allowed in drumman hand.Rerail
Personnel cover wheel with timber wedge, and personnel should stand in vehicle up direction or the both sides rerails tool rerail such as cucurbit, crowbar.Vehicle exists
During lifting, if special messenger observes the situation of change of lifting point, under-vehicle forbids the people that stands during vehicle rerail.
12) when inclined gallery are unloaded, drumman should be stopped tight brake, then cut off the power, the personnel of unloading should after vehicle comes to a complete stop,
Vehicle is fixed with car arrester or with anchor chain, then master scatters one by one from top to bottom.It is to cover firm vehicle with timber wedge that gallery, which is unloaded,
Pipeline is scattered one by one.Footman personnel on site commands, and personnel's action should be harmonious, avoids that accident occurs.
13) spacing that pipe fitting is unloaded is advisable in order to install, and inclined gallery pipeline rope belt is tight, prevents from gliding.
4 lifting pipelines, connection
During lifting pipeline, the appropriate selecting pipe of power is born according to the maximum hoisting weight and anchor pole of jack, the maximum of anchor cable
Road radical；Before lifting, jack is first fixed on anchor cable, the pipe ends connected are fixed with jack,
It during lifting, first pipeline pull-up ground 200mm, waits for 3 minutes, it is ensured that recurrence is hung to design height after safety, draws
During jack, it is to be ensured that both ends jack uniformly lifts by crane,
After the completion of lifting, pipeline is fixed with corresponding steel wire rope, rope card and strainer.
The hanging of gas pipeline is using the wire rope hanging of φ 12.5-6*19, and hanging spacing is 3 meters, and hanging position is located at
Line connection（Unified leftward or rightward 500mm）,
When gas pipeline is hung, sling point must hang on anchor disk two ropes on each sling point and block, and gas pipeline is hung
During extension, sling point must be hung on anchor disk, must not be hung on bar-mat reinforcement or wire netting.
5 pipelines connect, and pipeline flange installs its contact and answers keeping parallelism and keep alignment, bolt that can freely pass into,
Ensure that connection bolt is worn to consistent, well-balanced, the elastic appropriateness of fastening, 2-4 screw pitch of exposing.
Pipeline installation and its connector installation site meet design requirement, install must not be close to help wall, towards it is reasonable, be convenient for
Maintenance, often saving ensures a suspension centre on pipeline, two rope cards on each suspension centre.
The pipeline installation gradient meets design requirement, and gradient deviation is no more than the 1/3 of design.
Pipeline is mounted on position in gallery and hangs down with stringcourse away from tolerance ± 30mm.
The model of valve meets design requirement, and installation site inlet and outlet are in the right direction, are connected firmly, closely, open and close flexibly,
Handwheel, handle will be cleaned towards reasonable, valve surface.
Claims (1)
1. a kind of gas drainage pipeline system construction method under large-diameter well, it is characterised in that：Preparation before construction, measures first
Then unwrapping wire burn-ons steel pipe pipeline section or pipe fitting both ends flange on well, carry out preservative treatment, and being delivered to underground by mine car pacifies
Place is filled, pipeline section is promoted to mounting height using jack, is suspended on pipeline section with steel wire rope and strainer mounted in advance
Under anchor pole or anchor cable, it is fastened by bolts centre and is lined with the adjacent tubular segments of asbestos rubber pad or the flange of pipe fitting or valve, reach
The effect of sealing, last pipeline pressure experiment, trial operation, handing-over；
Specifically comprise the following steps：
（1）Surveying setting-out
Before anchor pole, anchor cable construction, unwrapping wire need to be measured by design, first the specific position of pipeline is determined according to design requirement before unwrapping wire
It puts, unwrapping wire is then carried out according to the datum line provided in ore deposit；Using the intersection point of datum line and two intersection datum lines as foundation during unwrapping wire,
With the intersection point of the right-angled intersection point alignment fiducials line of laser level and make two cross hairs with intersecting benchmark line overlap, Ran Houyong
Tape measure pushes up the crosspoint for measuring and orienting pipeline in tunnel；With this crosspoint cooperation laser level, mining directly to instrument, engineering
Cotton rope carries out unwrapping wire, after determining pipeline line position, is measured with tape measure, and every 3 meters of anchor pole position and every is pushed up in tunnel with paint
12 meters of anchor cable position makes marks, with this alternately unwrapping wire；
（2）Pipeline section, pipe fitting processing
According to underground survey data, the processing work of elbow is carried out on well, one end of elbow or threeway is using lap joint flange, even
When connecing slag-discharging device, tailrace and valve, pipeline section end should also use lap joint flange；
（3）Pipeline transports
When pipeline ships, 3 are filled with flat car encapsulation per car, the threeway of processing, pipe nipple, elbow are shipped with flower column vehicle or mine car,
With φ 12.5mm steel wire ropes and rope card envelope vehicle, pipeline both sides are covered jail with timber wedge, are tightened with crowbar in haulage vehicle both ends steel wire rope
And fixation, and tightened at steel wire rope knotting with 8# iron wires, pipeline both ends are protected with plank, it is other to prevent breaking
Object, during entrucking, the center of gravity of pipeline will be consistent with the center of gravity of vehicle, pipeline be transported to appointed place by ore deposit transport team, so
Personnel being arranged to transport to job location by unit in charge of construction afterwards, scattered by erection sequence, during gallery cart, primary standard pushes away a vehicle, and
In both ends cart, the spacing of cart in the same direction when track grade is less than or equal to 5 ‰, cannot be less than 10 meters, the gradient is more than 5 ‰
When, it cannot be less than 30 meters；
（4）Lifting pipeline, connection；
During lifting pipeline, power born according to the maximum hoisting weight and anchor pole of jack, the maximum of anchor cable and suitably select pipeline root
Number；Before lifting, jack is first fixed on anchor cable, the pipe ends connected are fixed with jack, during lifting, first pipeline
Pull-up ground 200mm is waited for 3 minutes, it is ensured that recurrence is hung to design height after safety, when forgetting about it chain, it is to be ensured that both ends jack is equal
After the completion of lifting, pipeline is fixed with corresponding steel wire rope, rope card and strainer for even lifting,
The hanging of gas pipeline is using the wire rope hanging of φ 12.5mm-6*19, and hanging spacing is 3 meters, and hanging position is located at pipe
Road junction, when gas pipeline is hung, sling point must be hung on anchor disk, two rope cards on each sling point, pipeline installation
Gradient deviation is no more than the 1/3 of design, and pipeline is mounted on position in gallery and hangs down with stringcourse away from tolerance ± 30mm,
（5）Connecting pipe flange, pipeline pressure experiment, trial operation, handing-over.
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| CN201310747888.0A CN103775734B (en) | 2013-12-31 | 2013-12-31 | Gas drainage pipeline system construction method under large-diameter well |
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| CN201310747888.0A CN103775734B (en) | 2013-12-31 | 2013-12-31 | Gas drainage pipeline system construction method under large-diameter well |
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| CN103775734B true CN103775734B (en) | 2018-07-06 |
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| CN104344075B (en) * | 2014-10-24 | 2017-03-29 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | Shaft construction hangs the quick handling of interim edema due to wind pathogen pipeline and installation method using the borehole wall |
| CN107013245A (en) * | 2017-05-31 | 2017-08-04 | 中国恩菲工程技术有限公司 | Pipeline fixing device |
| CN110318804A (en) * | 2018-03-28 | 2019-10-11 | 中国有色集团抚顺红透山矿业有限公司 | Underground mining field hoisting structure and installation method |
| CN108626482B (en) * | 2018-04-23 | 2019-10-08 | 西山煤电建筑工程集团有限公司矿建第一分公司 | Utilize the construction method of anti-well drilling machine installation vertical gas pipe |
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| DE619511C (en) * | 1935-10-02 | Helmut Dueker | Device for pipe suspension | |
| DE886290C (en) * | 1951-09-27 | 1953-08-13 | Paul Baehr | Connection clamp for the ends of wire loops in pipe suspensions |
| US5474274A (en) * | 1993-10-22 | 1995-12-12 | Bernosky; John | Coupling and load support for suspending a load from the head of a coal mine roof bolt |
| CN201902703U (en) * | 2010-12-09 | 2011-07-20 | 西安建筑科技大学 | Suspension protective device for underground pipeline |
| CN202061584U (en) * | 2011-03-30 | 2011-12-07 | 鞍钢股份有限公司 | Water adding pipe of secondary mixing machine |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH606891A5 (en) * | 1975-06-12 | 1978-11-15 | Impex Essen Vertrieb |
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2013
- 2013-12-31 CN CN201310747888.0A patent/CN103775734B/en active Active
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| DE619511C (en) * | 1935-10-02 | Helmut Dueker | Device for pipe suspension | |
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| US5474274A (en) * | 1993-10-22 | 1995-12-12 | Bernosky; John | Coupling and load support for suspending a load from the head of a coal mine roof bolt |
| CN201902703U (en) * | 2010-12-09 | 2011-07-20 | 西安建筑科技大学 | Suspension protective device for underground pipeline |
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| 浅谈煤矿大直径瓦斯抽采管道安装工艺及施工方法;陶祥;《现代物业》;20130505;第12卷(第5期);第100-102页 * |
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| CN103775734A (en) | 2014-05-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| CB03 | Change of inventor or designer information | ||
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Inventor after: Zhang Bing Inventor after: Wang Wenyong Inventor after: Li Fang Inventor after: Qi Yong Inventor after: Ji Yuekui Inventor after: Luo Xu Inventor before: Zhang Bing Inventor before: Wang Wenyong Inventor before: Li Fang Inventor before: Qi Yong Inventor before: Luo Xu |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |