CN201437600U - Dredging conveyer - Google Patents
Dredging conveyer Download PDFInfo
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- CN201437600U CN201437600U CN2009201634155U CN200920163415U CN201437600U CN 201437600 U CN201437600 U CN 201437600U CN 2009201634155 U CN2009201634155 U CN 2009201634155U CN 200920163415 U CN200920163415 U CN 200920163415U CN 201437600 U CN201437600 U CN 201437600U
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Abstract
The utility model provides a dredging conveyer. The dredging conveyer comprises a walking device, a dredging device, a feeding device, a swinging device, a lifting device, a material collecting device and a pumping device, wherein the walking device is used for driving the dredging conveyer to move in a water sump; the dredging device is used for dredging and collecting shoal materials in the water sump; the feeding device is provided with a feeding end and a discharging end and used for lifting shoal materials dredged and collected through the dredging device from the feeding end to the discharging end; the swinging device is provided with a first end and a second end and used for realizing the horizontal swinging motion of the dredging device; the lifting device is provided with a first end and a second end and used for leading the lifting motion of the feeding device to drive the dredging device to realize the lifting motion; the material collecting device with a feed opening formed thereon is used for receiving shoal materials from the discharging end of the feeding device; and the pumping device with a material absorbing port formed thereon is used for absorbing shoal materials received by the material collecting device and conveying the shoal materials out. The dredging conveyer has the advantages of simple structure, safe and convenient use, and high operational reliability, and can realize the mechanized dredging operation in the water sump and is more practical.
Description
Technical field
The present invention relates to dibhole digging conveying device under a kind of coal mine, particularly relate to a kind of integrate clearly dig, material loading, carry dig conveyer clearly.
Background technology
The colliery shaft sump is to prevent that mine water disaster from guaranteeing the critical facility of Safety of Coal Mine Production.Each mine all must possess mine sump, be used for the buffer storage that mine water effluxes, temporarily hold water burst and engineering water that mine is occurred in recovery process, when preventing that drainage plant from breaking down or suddenly a large amount of water burst and floods take place, mine sump can also precipitate solid particle in the water simultaneously, purifies water.But be mingled with a large amount of coal dusts, clay, cash slag and concrete slag owing to flow in the interior mine water of sump, make it in sump, to deposit, cause following harmful effect:
1, the sump dischargeable capacity is reduced, forfeiture or part are lost water storage function;
2, become silted up when too much when long-pending, a large amount of deposits enter absorbing well, absorption well, are inhaled into water pump then, make the flow passage components wearing and tearing aggravation of water pump, have a strong impact on its drainage efficiency and application life, even can stop up the suction tap, cause draining difficulty or can't draining.
Therefore, regularly and efficiently digging sump clearly is to improve one of Mine Drainage System safety and economy important channel.And " safety regulations in coal mine " regulation before arriving annual rainy season, must be dug clearly the coal slime of sump, to guarantee the safety in production in flood season.
At present, the cleaning to the sump deposit mainly contains following several mode:
1, manually deposit is loaded in the mine car, deposit is transported sump with winch.This mode, working strength is big, task difficulty is big, at the bottom of the production efficiency, clearly dig the cycle long, the transportation mine car is spilt easily, not only pollute production environment but also produce serious potential safety hazard;
2, earlier deposit is carried out agitation and dilution, with pump deposit is pumped then, carry out second dehydration again, and then be promoted to ground.This mode needs the dehydration again of dilution earlier, wastes energy, and labour intensity is big, and cleaning efficiency is low;
3, the combination by mechanical helical blade and scraper plate machine, complete machine be walking forward automatically along the tunnel, by drag conveyor deposit is promoted on the drag conveyor that relies on helical blade that deposit is collected to be delivered on the mine car again.This mode is because scraper plate machine fed distance is long, leaks seriously, and inefficiency transports mine car simultaneously and spills easily, not only pollutes production environment but also produce serious potential safety hazard.
This shows that the Removal Technology of above-mentioned existing sump deposit and equipment obviously still have inconvenience and defective in structure and use, demand urgently being improved.For solving the deficiency of existing sump deposit Removal Technology, the applicant has applied for that on November 3rd, 2006 name is called the application for a patent for invention (application number is 200610138033.8) of " down-hole water warehouse coal slurry digging device ", in this patent of invention disclosed down-hole water warehouse coal slurry digging device integrate clearly dig, material loading and line transportation, the automation and the mechanization of sump cleaning have been realized, but owing to dig spiral clearly and carry scraper plate weight excessive, the swing difficulty, inefficiency; And this down-hole water warehouse coal slurry digging device can only realize swinging, and can't realize elevating movement, digs clearly to be limited in scope.
Specifically, application number is that 200610138033.8 the disclosed down-hole water warehouse coal slurry digging device of Chinese patent is by digging spiral clearly, carrying scraper plate, pendulous device, walking pallet, conveyor screw, Concentrated material pump etc. partly to form.Wherein, dig the front that spiral is positioned at whole device clearly, helical blade adopts does not have the axle spiral.Carry scraper plate one end to connect one with digging the spiral mid portion clearly, the other end is positioned at above the conveyor screw feeding mouth.Conveyor screw one end is positioned at carries scraper plate discharge end downside, and the other end connects one with the Concentrated material pump charging aperture.Concentrated material pump is installed on the walking pallet, is positioned at the rear side of whole device.Pendulous device one end connects with digging spiral clearly, and another is hinged together with the walking pallet is logical.Changed course oil cylinder one end is connected with the walking pallet, and the other end and pendulous device are hinged together.
Owing to carry scraper plate to fuse with digging the spiral mid portion clearly, so swing mechanism needs swing simultaneously to dig spiral clearly and carries scraper plate, thereby cause the load of pendulous device bigger, on the one hand the volume of pendulous device is bigger for this, and the power that causes swinging consumption on the other hand is bigger.
In addition, the down-hole water warehouse coal slurry digging device of this patent application has only pendulous device, can only realize digging clearly swinging of spiral, has limited the scope of application of water position slurry clearing and dugging device to a certain extent.
For this reason, be necessary that the shaft sump of researching and developing new structure digs conveyer clearly.
Summary of the invention
What the invention provides a kind of new structure digs conveyer clearly, this digs the conveyer collection clearly and excavates, gathers materials, stirs and be pumped to one, be suitable for clearing up the deposit in the sump, this digs the conveyer complete function clearly, compliance is strong, simple in structure, safe and convenient to use, functional reliability is high, has overcome in the prior art water position slurry clearing and dugging device and has dug clearly that spiral is difficult to swing and dig the defective that is limited in scope clearly.
The invention provides a kind of conveyer that digs clearly, it is suitable for clearing up the deposit in the sump, and the described conveyer that digs clearly comprises: running gear, and it is used to drive the described conveyer that digs clearly and moves in described sump; Digging device, it is used for digging clearly and collecting the interior deposit of described sump; Feeding device, it has feed end and discharge end, and the feed end of described feeding device is connected with described digging device, and the described deposit that described feeding device is used for described digging device is dug clearly and collects is promoted to described discharge end from described feed end; Pendulous device, it has first end and second end, and first end of described pendulous device is connected with described digging device is detachable, and second end of described pendulous device is connected with described feeding device, is used to make described digging device to realize swinging; Lifting gear, it has first end and second end, and first end of described lifting gear is arranged on the described running gear, and its second end is connected with described feeding device, be used to make described feeding device to carry out elevating movement, realize elevating movement thereby drive described digging device; Material-gathering device with charging aperture, it is arranged on the described running gear, and described charging aperture is arranged at the below of described feeding device discharge end, is used to receive the deposit via described feeding device discharge end; And the pumping installations with material sucking port, it is arranged on the described running gear, and described material sucking port is connected with described material-gathering device, is used to suck described deposit that described material-gathering device receives and described deposit is transferred out.
Compared with prior art, feeding device of the present invention is connected with digging device, but be not to be connected as a single entity, like this when pendulous device turns round, only driving digging device swings, thereby make the load of pendulous device reduce, not only reduced the volume of pendulous device, and reduced the power that swing consumes; In addition, the conveyer that digs clearly of the present invention has increased lifting gear, when lifting gear turns round, can drive feeding device and carry out elevating movement, because of feeding device is connected with digging device, can drives digging device and carry out elevating movement.The conveyer that digs clearly of the present invention both can have been realized swinging, and can realize elevating movement again, had expanded the height and the width that are dug sump clearly, had enlarged the scope of using of water position slurry clearing and dugging device largely.Of the present inventionly dig conveyer clearly compared with prior art, solved the defective of swing difficulty, realized flexible swing, and can carry out elevating movement, solved the defective of digging the scope limitation clearly.
Running gear of the present invention can be that wheeled construction, track structure and other can drive the described conveyer that digs clearly and realize the device that moves.Running gear of the present invention can be driven by various hydraulic motors.
Digging device of the present invention can be scraper bowl, bucket or dig spiral clearly, the feed end that is used for digging the deposit in the sump clearly and described deposit is collected in described feeding device.
Feeding device of the present invention can be to carry scraper plate, conveyor screw or conveyer belt, promotes the discharge end that is delivered to described feeding device as long as described digging device can be collected in the deposit of described feeding device feed end.
Pendulous device of the present invention can drive described digging device and swing, thus adapt to the variation of sump span length and turning dig operation clearly.
Lifting gear of the present invention can suitably be adjusted the height of digging device according to the height of deposit in the sump on the one hand, digs efficient clearly thereby improve; On the other hand, can promote described feeding device, thereby promote the feed end of described feeding device, and then improve loading efficiency.
Material-gathering device of the present invention, has charging aperture, this charging aperture is arranged on the below of described feeding device discharge end, match with the discharge end of described feeding device, be used to receive the deposit of described feeding device discharge end, material-gathering device of the present invention can be any vessel with charging aperture, can be various storage bin hoppers, cell body, bucket etc. for example, and this is that those of ordinary skills are known.
Pumping installations of the present invention is used to suck the deposit in the described material-gathering device, and this deposit is delivered to other places, for example the coal slime recovery system.
The conveyer that digs clearly of the present invention also can comprise actuating unit.
Preferably, described running gear can be track structure.In the prior art, usually use the wheeled construction of track, because sump inner orbit distortion, and make difficulty in walking.And the present invention can overcome such defective by using track structure.
Preferably, described digging device can comprise that two nothing axles dig spiral clearly, and it is identical that described two nothing axles dig helical structure clearly, is separately positioned on the both sides of described feeding device feed end, can deliver to the deposit that digs collection clearly with spiral the feed end of feeding device.Use the nothing axle to dig spiral clearly and avoided water-house coal mud, improved the conveying capacity of material revolving the sticking axle phenomenon of axle.
Preferably, described feeding device can be the conveying scraper plate, more preferably, can be provided with sealing plate on the described conveying scraper plate, is used to prevent the leakage at deposit described in the course of conveying, makes that so described feeding device sealing is reliable, thereby improves loading efficiency.This has overcome the low defective of the poorly sealed loading efficiency that causes in the prior art.Described conveying scraper plate also can comprise sprocket wheel and chain.
Preferably, described conveying scraper plate can be double-stranded wheel construction formula arranged side by side and carries scraper plate, and two sprocket wheels are installed in the scraper plate middle part side by side.Traditional conveying scraper plate drive sprocket is positioned at the scraper plate both sides, hindered material moving in scraper plate, used double-stranded wheel construction formula arranged side by side to carry scraper plate, two sprocket wheels are installed in the scraper plate middle part side by side, eliminated digging device and carried the conveying of deposit to hinder, improved operating efficiency to feeding device.
Preferably, can be provided with shaft in the described material-gathering device, be used to improve the effect that described pumping installations sucks described deposit.
Preferably, described pumping installations is a plunger displacement pump, and this plunger displacement pump pumping distance, discharge pressure height can the higher deposits of transportation concentration.
Operating principle of digging conveyer clearly of the present invention is: digging device, for example two nothing axles dig spiral rotation under the driving of feeding device (for example scraper plate feeding device of band sealing) clearly, dig clearly and the deposit in the sump is carried to the feeding device of centre by two ends, and upwards carry and be promoted in the material-gathering device by feeding device, deposit can stir through shaft in material-gathering device, by pumping installations (for example plunger displacement pump) deposit in the material-gathering device is pumped by conveyance conduit again.Digging clearly in the process, the running gear drive is dug conveyer clearly and is walked forward, make that digging operation clearly extends forward, when the sump span length changes, the operation pendulous device makes the left and right swing of digging device, changes requirement to adapt to it, when the sump head-room changes, the operation lifting gear makes feeding device drive digging device and realizes upper and lower motion, changes requirement to adapt to it.
Description of drawings
Fig. 1: the lateral view that digs conveyer clearly of the present invention;
Fig. 2: the vertical view that digs conveyer clearly of the present invention;
Fig. 3: the schematic diagram of an embodiment of the feeding device that digs conveyer clearly of the present invention;
Fig. 4: the chain sprocket structure schematic diagram of an embodiment of the feeding device that digs conveyer clearly of the present invention.
Wherein:
1, digging device 2, feeding device 3, pendulous device 4, lifting gear
5, material-gathering device 6, actuating unit 7, running gear 8, pumping installations
9, carry scraper plate 10, sealing plate 11, sprocket wheel 12, chain
The specific embodiment
The present invention is described in further detail below in conjunction with the specific embodiment.
Unless otherwise noted, below mentioned quantity, all can change as required, for example, dig the number of spiral etc. clearly, can change as required.
Dig conveyer clearly according to an embodiment of the invention, it is suitable for clearing up the deposit in the sump, as depicted in figs. 1 and 2, the described conveyer that digs clearly comprises: running gear 7, digging device 1, feeding device 2, pendulous device 3, lifting gear 4, material-gathering device 5 and pumping installations 8.
Described running gear 7 is used to drive the described conveyer that digs clearly and moves in described sump.
Described digging device 1 is used for digging clearly and collecting the interior deposit of described sump.
Described feeding device 2 has feed end and discharge end, and the feed end of described feeding device 2 is connected with described digging device 1, and described feeding device 2 is used for the described deposit that described digging device 1 digs clearly and collects is promoted to described discharge end from described feed end.
Described pendulous device 3 has first end and second end, first end of described pendulous device 3 and described 1 detachable being connected of digging device, and second end of described pendulous device 3 is connected with described feeding device 2, is used to make described digging device 1 to realize swinging.
Described lifting gear 4 has first end and second end, first end of described lifting gear 4 is arranged on the described running gear 7, and its second end is connected with described feeding device 2, is used to make described feeding device 2 to carry out elevating movement, realizes elevating movement thereby drive described digging device 1.
Described material-gathering device 5 is arranged on the described running gear 7, has charging aperture, and described charging aperture is arranged at the below of described feeding device 2 discharge ends, is used to receive the deposit of described feeding device 2 discharge ends.
Described pumping installations 8 is arranged on the described running gear 7, has material sucking port, and described material sucking port is connected with described material-gathering device 5, is used to suck described deposit that described material-gathering device 5 receives and described deposit is transferred out.
The above-mentioned conveyer that digs clearly also can comprise actuating unit 6.Above-mentioned running gear 7 can be that wheeled construction, track structure and other can drive the described conveyer that digs clearly and realize the device that moves.In an embodiment of the invention, described running gear 7 is a track structure, the defective that this can be avoided using the wheeled mechanism of track to be difficult to walk because of track deformation.Running gear of the present invention can be driven by various hydraulic motors.
Above-mentioned digging device 1 can be scraper bowl, bucket or dig spiral clearly.In an embodiment of the invention, described digging device 1 comprises that two nothing axles dig spiral clearly, it is identical that described two nothing axles dig helical structure clearly, direction of rotation is opposite, can be separately positioned on the both sides of described feeding device feed end, for example, it is left-hand screw structure and right-hand screw structure that described two nothing axles dig spiral clearly, can deliver to the deposit that digs collection clearly with spiral the feed end of material loading structure.
Above-mentioned feeding device 2 can be to carry scraper plate, conveyor screw or conveyer belt.In an embodiment of the invention, described feeding device 2 is for carrying scraper plate 9, and described conveying scraper plate 9 is provided with sealing plate 10, uses sealing plate can prevent leakage at deposit described in the course of conveying, thereby improves loading efficiency.In an embodiment of the invention, described conveying scraper plate can be double-stranded wheel construction formula arranged side by side and carries scraper plate, and two sprocket wheels are installed in the scraper plate middle part side by side, can eliminate digging device and carry the conveying of deposit to hinder to feeding device.Described conveying scraper plate also can comprise sprocket wheel 11 and chain 12.
Above-mentioned material-gathering device 5 can be various storage bin hoppers, cell body, bucket etc., can be provided with shaft in the described material-gathering device 5, is used to improve the effect that described pumping installations sucks described deposit.
Above-mentioned pumping installations 8 can be plunger displacement pump, and pumping distance, discharge pressure height can the higher deposits of transportation concentration.
The conveyer that digs clearly of the present invention has following advantage at least:
1, feeding device is connected with digging device, but is not to be connected as a single entity, and when pendulous device is worked, only drives digging device and swings, thereby realize swing flexibly.
2, use lifting gear to make feeding device drive digging device and carry out elevating movement, adapt to the variation of dibhole digging height, digging device is interfered when preventing to pass in and out sump upward slope or descending.
3, use the feeding device sealing of band sealing plate reliable, leak less, high efficiency.
4, the feeding device of use double-stranded wheel construction arranged side by side, and two sprocket wheels is installed in the middle part of the scraper plate side by side, has eliminated digging device and has carried the conveying of deposit to hinder to feeding device.
5, pumping pressure height, fed distance is far away, and can the higher deposit of transportation concentration.
6, by line transportation alluvial material, nothing is spilt, and has improved operating environment, has eliminated operation hidden danger.
The conveyer that digs clearly of the present invention, Removal Technology the digging device swing difficulty that exists and the defective of digging the scope limitation clearly of existing sump deposit have been overcome, provide a kind of shaft sump of new structure to dig conveyer clearly, simple in structure, safe and convenient to use, functional reliability is high, this device collection excavates, gathers materials, stirs and is pumped to one, can realize the mechanized of dibhole digging, thereby be suitable for practicality more.
Be basic design of the present invention as mentioned above.But, in technical field of the present invention,, can improve other exercisable embodiment of the present invention as long as possess the most basic knowledge.In the present invention substantive technical scheme has been proposed the patent protection request, its protection domain should comprise all variation patterns with above-mentioned technical characterstic.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, though the present invention is with the preferred embodiment disclosure as above, yet be not in order to limit the present invention.Those of ordinary skills in not breaking away from the technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make amendment and change.It is pointed out that foundation technical spirit of the present invention to any simple modification, equivalent variations and modification that above embodiment did, all still belongs in the scope of technical solution of the present invention.Protection scope of the present invention is defined by the following claims.
Claims (9)
1. one kind is dug conveyer clearly, and the deposit that it is suitable for clearing up in the sump is characterized in that the described conveyer that digs clearly comprises:
Be used to drive the described running gear (7) that conveyer moves that digs clearly in described sump;
Be used for digging clearly and collecting the digging device (1) of the deposit in the described sump;
Be used for described deposit that described digging device (1) is dug clearly and collects and be promoted to the feeding device (2) of described discharge end from described feed end, it has feed end and discharge end, and the feed end of described feeding device (2) is connected with described digging device (1);
Lifting gear (4), its have first end and be used to make described feeding device (2) thus carrying out elevating movement drives second end that described digging device (1) is realized elevating movement, first end of described lifting gear (4) is arranged on the described running gear (7), and its second end is connected with described feeding device (2);
Have the material-gathering device (5) of the charging aperture of the deposit that is used to receive described feeding device (2) discharge end, it is arranged on the described running gear (7), and described charging aperture is arranged at the below of described feeding device (2) discharge end; And
Have the pumping installations (8) of the material sucking port that is used to suck described deposit that described material-gathering device (5) receives and described deposit is transferred out, it is arranged on the described running gear (7), and described material sucking port is connected with described material-gathering device (5).
2. the conveyer that digs clearly according to claim 1, it is characterized in that, the described conveyer that digs clearly also comprises pendulous device (3), pendulous device (3) has first end and is used to make described digging device (1) to realize second end that swings, first end of described pendulous device (3) is connected with described digging device is detachable, and second end of described pendulous device (3) is connected with described feeding device (2).
3. the conveyer that digs clearly according to claim 1 and 2 is characterized in that described running gear (7) is a track structure.
4. the conveyer that digs clearly according to claim 1 and 2 is characterized in that, described digging device (1) comprises that two nothing axles dig spiral clearly, and it is identical that described two nothing axles dig helical structure clearly, is separately positioned on the both sides of described feeding device (2) feed end.
5. the conveyer that digs clearly according to claim 1 and 2 is characterized in that, described feeding device (2) is for carrying scraper plate (9).
6. the conveyer that digs clearly according to claim 5 is characterized in that, described conveying scraper plate (9) is provided with the sealing plate (10) that is used to prevent in the leakage of deposit described in the course of conveying.
7. the conveyer that digs clearly according to claim 5 is characterized in that, described conveying scraper plate (9) is that double-stranded wheel construction formula arranged side by side is carried scraper plate, and two sprocket wheels are installed in the scraper plate middle part side by side.
8. the conveyer that digs clearly according to claim 1 and 2 is characterized in that, is provided with in the described material-gathering device (5) to be used to improve the shaft that described pumping installations (8) sucks the effect of described deposit.
9. the conveyer that digs clearly according to claim 1 and 2 is characterized in that described pumping installations (8) is a plunger displacement pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201634155U CN201437600U (en) | 2009-07-10 | 2009-07-10 | Dredging conveyer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201634155U CN201437600U (en) | 2009-07-10 | 2009-07-10 | Dredging conveyer |
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| CN201437600U true CN201437600U (en) | 2010-04-14 |
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| CN2009201634155U Expired - Fee Related CN201437600U (en) | 2009-07-10 | 2009-07-10 | Dredging conveyer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942847B (en) * | 2009-07-10 | 2012-06-20 | 北京中矿环保科技股份有限公司 | Dredging conveyer |
| CN106988371A (en) * | 2017-04-10 | 2017-07-28 | 南昌首叶科技有限公司 | A kind of rare earth mining site land used face cubic metre of earth collecting device |
| CN108049913A (en) * | 2018-01-13 | 2018-05-18 | 山东莱芜煤矿机械有限公司 | A kind of coal mine underground sump digs clearly standby |
| CN108266224A (en) * | 2018-01-13 | 2018-07-10 | 山东莱芜煤矿机械有限公司 | A kind of coal mine underground sump digs clearly process and its equipment |
-
2009
- 2009-07-10 CN CN2009201634155U patent/CN201437600U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942847B (en) * | 2009-07-10 | 2012-06-20 | 北京中矿环保科技股份有限公司 | Dredging conveyer |
| CN106988371A (en) * | 2017-04-10 | 2017-07-28 | 南昌首叶科技有限公司 | A kind of rare earth mining site land used face cubic metre of earth collecting device |
| CN106988371B (en) * | 2017-04-10 | 2019-07-16 | 徐州绿湾农业发展有限公司 | A kind of rare earth mining site land used face cubic metre of earth collecting device |
| CN108049913A (en) * | 2018-01-13 | 2018-05-18 | 山东莱芜煤矿机械有限公司 | A kind of coal mine underground sump digs clearly standby |
| CN108266224A (en) * | 2018-01-13 | 2018-07-10 | 山东莱芜煤矿机械有限公司 | A kind of coal mine underground sump digs clearly process and its equipment |
| CN108266224B (en) * | 2018-01-13 | 2023-06-16 | 山东莱芜煤矿机械有限公司 | Underground coal mine sump dredging process and equipment thereof |
| CN108049913B (en) * | 2018-01-13 | 2024-05-10 | 山东莱芜煤矿机械有限公司 | Underground coal mine sump dredging equipment |
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Denomination of utility model: Dredging conveyer Effective date of registration: 20110901 Granted publication date: 20100414 Pledgee: Zhongguancun Beijing science and technology Company limited by guarantee Pledgor: Beijing Zhongkuang Sino-Environment Technology Co., Ltd. Registration number: 2011990000335 |
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Date of cancellation: 20121101 Granted publication date: 20100414 Pledgee: Zhongguancun Beijing science and technology Company limited by guarantee Pledgor: Beijing Zhongkuang Sino-Environment Technology Co., Ltd. Registration number: 2011990000335 |
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Granted publication date: 20100414 Termination date: 20120710 |