CN109184616A - Double-hole tube grouting plugging device and its application method - Google Patents
Double-hole tube grouting plugging device and its application method Download PDFInfo
- Publication number
- CN109184616A CN109184616A CN201811046106.XA CN201811046106A CN109184616A CN 109184616 A CN109184616 A CN 109184616A CN 201811046106 A CN201811046106 A CN 201811046106A CN 109184616 A CN109184616 A CN 109184616A
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- Prior art keywords
- grouting
- double
- tube
- hole
- pipe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The present invention relates to a kind of double-hole tube grouting plugging devices, including grouting bag, double-hole tube, check valve, safety valve, into slurry connector, recyclable Grouting Pipe, seal plug and caulking tube, grouting bag is uniformly distributed each along diplopore tube axis direction, grouting bag both ends are connect with diplopore tube outer surface, check valve is mounted on double-hole tube, safety valve is mounted on the double-hole tube outside grouting bag front end, double-hole tube includes tube body and partition, diplopore pipe end and seal plug are connected with each other, front end is connect with into slurry connector, it include protecting pipe into slurry connector, block and elastic sealing strip, its application method includes plugging device assembly, hole-sealing grouting, four steps such as sealing and plugging and recycling Grouting Pipe.Square structure composition of the invention is simple, flexible and convenient to use, and on the other hand when progress gas drainage hole blocks operation, operating process is simple, blocks operating efficiency height, achievees the purpose that improve closure operation quality and efficiency.
Description
Technical field
The present invention relates to double-hole tube grouting plugging device and its application method, belongs to gas drainage technical field.
Background technique
Currently there are hole packer type it is more.It is wherein common to wear formula hole packer, such hole packer
Deficiency is can only to carry out the disposable sealing pores of coal bed drilling, later period gas decaying can not be blocked again, and Grouting Pipe without
Method is recycled, as in existing patent formula " the fixed plugging device of gas drainage and its application method " (patent No.:
201310402234.4) with the prior arts such as " gas drainage wears formula plugging device and its application method ", within a particular process,
After plugging material fills sealing of hole space, if cracks in coal seam is relatively developed, then sealing of hole slurries can squeeze simultaneously under grouting pressure effect
Pouch is crossed by the relatively development crack around pouch, upper sealing of hole slurries are also perfused between the reserved air-leak section of design is emptied, make
Later period can not carry out gas leak treatment, therefore sealing characteristics is poor, and using flexible and reliability wretched insufficiency, ask for this
Topic, currently also has and uses the hole packer that double-hole tube is done, but, though that patent, using double-hole tube, two of double-hole tube are logical
Road, one is used to slip casting, and one is used to mash gas extraction, and pipe outside diameter is larger, therefore is highly prone to gas drainage pore structure limit
System, the working efficiency and plugging device for having seriously affected gas drainage hole sealing operation are to the adaptability of use environment, therefore, needle
To this problem, there is an urgent need to develop a kind of completely new gas drainage hole plugging devices and its corresponding pumping method, to meet
The needs of actual use.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides double-hole tube grouting plugging device and its application method.
To achieve the goals above, the present invention is to realize by the following technical solutions:
Double-hole tube grouting plugging device, including grouting bag, double-hole tube, check valve, safety valve, into slurry connector, recyclable note
Slurry pipe, seal plug and caulking tube, grouting bag at least two, and each grouting bag are uniformly distributed each along diplopore tube axis direction,
Grouting bag both ends are connect with diplopore tube outer surface, and constitute the closed hoop knot being coaxially distributed with gas drainage pipe with double-hole tube
Structure, and grouting bag is coated on gas drainage tube outer surface around gas drainage pipe axis, and in gas drainage hole, unidirectionally
Valve is several, is mounted on double-hole tube, and between the double-hole tube position being located in each grouting bag and adjacent grouting bag
On double-hole tube outside grouting bag, it is connected to wherein being located at grouting bag internal one-way valve and passing through grout outlet with double-hole tube, and
It is interconnected with grouting bag, the check valve outside grouting bag is interconnected with double-hole tube and mutual with gas drainage hole
Connection, safety valve sets one, be arranged close on slurry interface one end double-hole tube position and with double-hole tube and gas drainage hole phase
Intercommunicated, double-hole tube includes tube body and partition, and tube body is the closed hoop structure of circular in cross-section, and partition is embedded in tube body,
And be coaxially distributed with tube body, tubular body is divided equally mutually parallel and mutually independent slip casting lumen and envelope with tube body axis by partition
Plugging chamber, wherein slip casting lumen is interconnected by grout outlet with the check valve and safety valve being located inside grouting bag, is blocked
Lumen passes through grout outlet and is interconnected with the check valve and safety valve being located at outside grouting bag, and slip casting lumen and closure lumen
It is interconnected by least two grout outlets between each check valve and safety valve, diplopore pipe end is mutually interconnected with seal plug
It connects, front end is connect with into slurry connector, and by being interconnected respectively with recyclable Grouting Pipe and caulking tube into slurry connector, is connect into slurry
Head includes protecting pipe, block and elastic sealing strip, and block is " T " font structure, is divided into protecting pipe and by protecting pipe
Slip casting road and closure road, slip casting road diameter are 2-3 times for blocking road, and protecting pipe front end is coated on outside double-hole tube, and before double-hole tube
End face offsets with block, and flowing hole is set on block, and slip casting road is interconnected by the slip casting lumen of flowing hole and double-hole tube, blocks
Road is interconnected by the closure lumen of flowing hole and double-hole tube, and elastic sealing strip is mounted on the closure on block and with double-hole tube
Lumen offsets, and protecting pipe rear end is connected to recyclable Grouting Pipe and caulking tube respectively, wherein recyclable Grouting Pipe and slip casting road phase
Intercommunicated, caulking tube and closure road are interconnected, at least one shear pin are set on slip casting road, and infuse with recyclable by shear pin
Pipe is starched to be connected with each other.
Further, the partition cross section is any one in rectangular configuration or " S " type structure.
Further, the partition is an integral structure with tube body.
Further, in the grout outlet, each grout outlet axis for being connect with same each check valve and safety valve in 0 °-
120 ° of angles.
Further, the protecting pipe and block are an integral structure
Further, the closure road is L-shaped structure.
Further, it is any one in rectangle and isosceles trapezoidal structure that the grout outlet and flowing hole, which are cross section,
Kind.
The application method of double-hole tube grouting plugging device, includes the following steps:
The first step, plugging device assembly, determines the quantity of grouting bag according to the depth in gas drainage hole and diameter first, and
Grouting bag at least two, then to the grouting bag of plugging device, double-hole tube, check valve, into slurry connector, recyclable Grouting Pipe,
The components such as seal plug and caulking tube are assembled, and after completion of assembly, gas drainage pipe are penetrated to the annular of annular pouch
In circle, grouting bag winding holding gas pumping is adopted into winding outside pipe and is tightened, then the plugging device connected with gas drainage pipe
It is installed in gas drainage hole, finally connect recyclable Grouting Pipe and Grouting Pipe with grouting pump together；
Second step, injection hole sealing start grouting pump, and the slurries of closure are passed through after the operation for completing the first step
The Grouting Pipe that recyclable Grouting Pipe is transported to double-hole tube is intracavitary, and slurries are transported to by the check valve by being located in grouting bag
The intracavitary slurries of Grouting Pipe are delivered in grouting bag, and grouting pump is kept to continue working, so that the slurry pressure in grouting bag
It is lasting to increase, and when pressure is greater than the setting pressure of check valve, safety valve is opened, pressure release is carried out to the intracavitary slurries of Grouting Pipe,
And it completes to slip casting operation in grouting bag；
Third step, sealing and plugging close the company between grouting pump and recyclable Grouting Pipe after completing second step grouting operation
It connects, then take out recyclable Grouting Pipe and recycles, open simultaneously the connection of grouting pump and caulking tube, and slurries are passed through into double-hole tube
Closure lumen be located at grouting bag outside check valve be injected into gas drainage hole, realize to gas drainage hole block make
Industry, and reparation sealing is carried out to crack on the side wall of gas drainage hole；
4th step recycles Grouting Pipe, after completing third step operation and before slurries do not solidify, along recyclable Grouting Pipe axis
Line direction applies external force, and when external force is greater than shear pin bearing capacity, shear pin is broken and removes recyclable Grouting Pipe, then to note
Slurry pipe is cleaned.
A square structure of the invention is constituted simply, flexible and convenient to use, according to the usage requirement, a variety of gas is flexibly met and take out
The closure operation needs in hole are adopted, on the other hand when carrying out the closure operation of gas drainage hole, operating process is simple, blocks operation effect
Rate is high, can effectively reduce the use and the proportion of goods damageds of plugging material, and can be to crack on the hole wall of gas drainage hole the defects of just
Row sealing is repaired, and effectively avoids the generation and development in sealing section drilling surrounding coal wall crack, and this method for sealing makes sealing section
The region of high stress is generated around drilling, greatly reduces the gas permeability of drilling surrounding medium, so that reaching raising blocks operation quality
And the purpose of efficiency.
Detailed description of the invention
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments；
Fig. 1 is schematic structural view of the invention；
Fig. 2 is section structure diagram of the present invention；
Fig. 3 is double-hole tube structural schematic diagram；
Fig. 4 is into slurry joint structure schematic diagram；
Fig. 5 is application method flow chart of the present invention.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
The double-hole tube grouting plugging device picture 1-4, including grouting bag 1, double-hole tube 2, check valve 3, safety valve 4,
It is equal into slurry connector 7, recyclable Grouting Pipe 6, seal plug 5 and caulking tube 8, grouting bag 1 at least two, and each grouting bag 1
Uniformly distributed along 2 axis direction of double-hole tube, 1 both ends of grouting bag connects with 2 outer surface of double-hole tube, and with the composition of double-hole tube 2 and watt
The closed hoop structure that this drainage tube 9 is coaxially distributed, and grouting bag 1 is coated on gas drainage around 9 axis of gas drainage pipe
9 outer surface of pipe, and in gas drainage hole 10, check valve 3 is several, is mounted on double-hole tube 2, and be located at each slip casting bag
On the double-hole tube 2 outside the grouting bag 1 between 2 position of double-hole tube and adjacent grouting bag 1 in bag 1, wherein being located at slip casting
1 internal one-way valve 3 of pouch is connected to by grout outlet 11 with double-hole tube 2, and is interconnected with grouting bag 1, and slip casting bag is located at
Check valve 3 and double-hole tube 2 outside bag 1 are interconnected and are interconnected with gas drainage hole 10, and safety valve 4 sets one, installation
It is interconnected on slurry 2 position of interface one end double-hole tube and with double-hole tube 2 and gas drainage hole 10.
In the present embodiment, the double-hole tube 2 includes tube body 21 and partition 22, and tube body 21 is the closure of circular in cross-section
Cyclic structure, partition 22 in the tube body 21, and with the coaxial distribution of tube body 21, partition 22 by tubular body respectively and 21 axis of tube body
The mutual parallel and mutually independent slip casting lumen 23 of line and closure lumen 24, wherein slip casting lumen 23 by grout outlet 11 and is located at
Check valve 3 and safety valve 4 inside grouting bag 1 are interconnected, and block lumen 24 by grout outlet 11 and are located at grouting bag 1
External check valve 3 and safety valve 4 is interconnected, and slip casting lumen 23 and closure lumen 24 and each check valve 3 and safety valve 4
Between be interconnected by least two grout outlets 11,2 end of double-hole tube and seal plug 5 are connected with each other, and front end connects with into slurry
First 7 connection, and by being interconnected respectively with recyclable Grouting Pipe 6 and caulking tube 8 into slurry connector 7.
Described to include protecting pipe 71, block 72 and elastic sealing strip 73 into slurry connector 7 in the present embodiment, block 72 is
Protecting pipe 71 in protecting pipe 71 and is divided into slip casting road 74 and blocks road 75 by " T " font structure, and 74 diameter of slip casting road is
2-3 times of road 75 is blocked, 71 front end of protecting pipe is coated on outside double-hole tube 2, and 2 front end face of double-hole tube offsets with block 73, block
Flowing hole 76 is set on 72, slip casting road 74 is interconnected by the slip casting lumen 23 of flowing hole 76 and double-hole tube 2, is blocked road 75 and is passed through
The closure lumen 24 of flowing hole 76 and double-hole tube 2 is interconnected, elastic sealing strip 73 be mounted on block 72 and with double-hole tube 2
It blocks lumen 24 to offset, 71 rear end of protecting pipe is connected to recyclable Grouting Pipe 6 and caulking tube 8 respectively, wherein recyclable Grouting Pipe 6
It is interconnected with slip casting road 74, caulking tube 8 and closure road are interconnected, at least one shear pin 77 are set on slip casting road 74, and lead to
It crosses shear pin 77 and recyclable Grouting Pipe 6 is connected with each other.
In the present embodiment, 22 cross section of partition is any one in rectangle or " S " type structure.
In the present embodiment, the partition 22 is an integral structure with tube body 21.
In the present embodiment, in the grout outlet 11, each grout outlet 11 for being connect with same each check valve 3 and safety valve 4
Axis is in 0 ° of -120 ° of angle.
In the present embodiment, the protecting pipe 71 and block 72 are an integral structure.
In the present embodiment, the closure road 75 is L-shaped structure.
In the present embodiment, the grout outlet 11 and flowing hole 76 are that cross section is appointing in rectangle and isosceles trapezoidal structure
It anticipates one kind.
As shown in figure 5, the application method of the double-hole tube grouting plugging device in the present embodiment, includes the following steps:
The first step, plugging device assembly, determines the quantity of grouting bag according to the depth in gas drainage hole and diameter first, and
Grouting bag at least two, then to the grouting bag of plugging device, double-hole tube, check valve, into slurry connector, recyclable Grouting Pipe,
The components such as seal plug and caulking tube are assembled, and after completion of assembly, gas drainage pipe are penetrated to the annular of annular pouch
In circle, grouting bag winding holding gas pumping is adopted into winding outside pipe and is tightened, then the plugging device connected with gas drainage pipe
It is installed in gas drainage hole, finally connect recyclable Grouting Pipe and Grouting Pipe with grouting pump together；
Second step, injection hole sealing start grouting pump, and the slurries of closure are passed through after the operation for completing the first step
The Grouting Pipe that recyclable Grouting Pipe is transported to double-hole tube is intracavitary, and slurries are transported to by the check valve by being located in grouting bag
The intracavitary slurries of Grouting Pipe are delivered in grouting bag, and grouting pump is kept to continue working, so that the slurry pressure in grouting bag
It is lasting to increase, and when pressure is greater than the setting pressure of check valve, safety valve is opened, pressure release is carried out to the intracavitary slurries of Grouting Pipe,
And it completes to slip casting operation in grouting bag；
Third step, sealing and plugging close the company between grouting pump and recyclable Grouting Pipe after completing second step grouting operation
It connects, then take out recyclable Grouting Pipe and recycles, open simultaneously the connection of grouting pump and caulking tube, and slurries are passed through into double-hole tube
Closure lumen be located at grouting bag outside check valve be injected into gas drainage hole, realize to gas drainage hole block make
Industry, and reparation sealing is carried out to crack on the side wall of gas drainage hole；
4th step recycles Grouting Pipe, after completing third step operation and before slurries do not solidify, along recyclable Grouting Pipe axis
Line direction applies external force, and when external force is greater than shear pin bearing capacity, shear pin is broken and removes recyclable Grouting Pipe, then to note
Slurry pipe is cleaned.
A square structure of the invention is constituted simply, flexible and convenient to use, according to the usage requirement, a variety of gas is flexibly met and take out
The closure operation needs in hole are adopted, on the other hand when carrying out the closure operation of gas drainage hole, operating process is simple, blocks operation effect
Rate is high, can effectively reduce the use and the proportion of goods damageds of plugging material, and can be to crack on the hole wall of gas drainage hole the defects of just
Row sealing is repaired, and effectively avoids the generation and development in sealing section drilling surrounding coal wall crack, and this method for sealing makes sealing section
The region of high stress is generated around drilling, greatly reduces the gas permeability of drilling surrounding medium, so that reaching raising blocks operation quality
And the purpose of efficiency.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. double-hole tube grouting plugging device, it is characterised in that: the double-hole tube grouting plugging device include grouting bag, double-hole tube,
Check valve, safety valve, into slurry connector, recyclable Grouting Pipe, seal plug and caulking tube, the grouting bag at least two,
And each grouting bag is uniformly distributed each along diplopore tube axis direction, the grouting bag both ends are connect with diplopore tube outer surface, and
The closed hoop structure being coaxially distributed with gas drainage pipe is constituted with double-hole tube, and the grouting bag is around gas drainage pipe
Axis is coated on gas drainage tube outer surface, and in gas drainage hole, the check valve is several, is mounted on double-hole tube
On, and the double-hole tube outside the grouting bag between the double-hole tube position being located in each grouting bag and adjacent grouting bag
On, it is connected to wherein being located at grouting bag internal one-way valve and passing through grout outlet with double-hole tube, and be interconnected with grouting bag, position
Check valve and double-hole tube outside grouting bag are interconnected and are interconnected with gas drainage hole, and the safety valve sets one
It is a, it is arranged close into starching on the double-hole tube position of interface one end and being interconnected with double-hole tube and gas drainage hole, described is double
Hole pipe includes tube body and partition, and the tube body is the closed hoop structure of circular in cross-section, and the partition is embedded in tube body
It is interior, and be coaxially distributed with tube body, tubular body is divided equally the mutually parallel and mutually independent note with tube body axis by the partition
It starches lumen and blocks lumen, wherein the slip casting lumen passes through grout outlet and the check valve and safety inside grouting bag
Valve is interconnected, and the closure lumen is mutually interconnected by grout outlet with the check valve and safety valve being located at outside grouting bag
It is logical, and be interconnected by least two grout outlets between slip casting lumen and closure lumen and each check valve and safety valve, institute
The diplopore pipe end stated and seal plug are connected with each other, and front end is connect with into slurry connector, and by into starch connector respectively with can return
Grouting Pipe and caulking tube is received to be interconnected, it is described into slurry connector include protecting pipe, block and elastic sealing strip, the block
For " T " font structure, in protecting pipe and protecting pipe is divided into slip casting road and blocks road, the slip casting road diameter is envelope
2-3 times of stifled road, protecting pipe front end is coated on outside double-hole tube, and double-hole tube front end face offsets with block, is set on the block
Flowing hole, the slip casting road are interconnected by the slip casting lumen of flowing hole and double-hole tube, and the closure road passes through overcurrent
The closure lumen of hole and double-hole tube is interconnected, and the elastic sealing strip is mounted on the closure lumen on block and with double-hole tube
Offset, the protecting pipe rear end is connected to recyclable Grouting Pipe and caulking tube respectively, wherein the recyclable Grouting Pipe with
Slip casting road is interconnected, and the caulking tube and closure road are interconnected, at least one shear pin is set on the slip casting road, and
It is connected with each other by shear pin and recyclable Grouting Pipe.
2. double-hole tube grouting plugging device according to claim 1, it is characterised in that: the partition cross section is rectangle knot
Any one in structure or " S " type structure.
3. double-hole tube grouting plugging device according to claim 1, it is characterised in that: the partition and tube body is integral type
Structure.
4. double-hole tube grouting plugging device according to claim 1, it is characterised in that: and same each in the grout outlet
Each grout outlet axis that check valve is connected with safety valve is in 0 ° of -120 ° of angle.
5. double-hole tube grouting plugging device according to claim 1, it is characterised in that: the protecting pipe and block is integrated
Formula structure.
6. double-hole tube grouting plugging device according to claim 1, it is characterised in that: the closure road is L-shaped structure.
7. double-hole tube grouting plugging device according to claim 1, it is characterised in that: the grout outlet and flowing hole is cross
Section is any one in rectangle and isosceles trapezoidal structure.
8. the application method of double-hole tube grouting plugging device described in any one of -7 according to claim 1, it is characterised in that: described
The application method of double-hole tube grouting plugging device include the following steps:
The first step, plugging device assembly, determines the quantity of grouting bag, and slip casting according to the depth in gas drainage hole and diameter first
Pouch at least two, then to the grouting bag of plugging device, double-hole tube, check valve, into slurry connector, recyclable Grouting Pipe, sealing
The components such as plug and caulking tube are assembled, and after completion of assembly, gas drainage pipe are penetrated in the annular ring of annular pouch,
Grouting bag winding holding gas pumping is adopted to wind outside pipe and is tightened, then one TongAn of plugging device connected with gas drainage pipe
It is attached in gas drainage hole, finally connect recyclable Grouting Pipe and Grouting Pipe with grouting pump；
Second step, injection hole sealing start grouting pump, and by the slurries of closure by that can return after the operation for completing the first step
The Grouting Pipe that receipts Grouting Pipe is transported to double-hole tube is intracavitary, and slurries are transported to slip casting by the check valve by being located in grouting bag
Slurries are delivered in grouting bag in lumen, and grouting pump is kept to continue working, so that the slurry pressure in grouting bag continues
It increases, and when pressure is greater than the setting pressure of check valve, safety valve is opened, and carries out pressure release to the intracavitary slurries of Grouting Pipe, and complete
Slip casting operation in pairs of grouting bag；
Third step, sealing and plugging close the connection between grouting pump and recyclable Grouting Pipe after completing second step grouting operation,
It then takes out recyclable Grouting Pipe and recycles, open simultaneously the connection of grouting pump and caulking tube, and slurries are passed through into double-hole tube
It blocks lumen and is injected into gas drainage hole with the check valve being located at outside grouting bag, realize to block gas drainage hole and make
Industry, and reparation sealing is carried out to crack on the side wall of gas drainage hole；
4th step recycles Grouting Pipe, after completing third step operation and before slurries do not solidify, along recyclable Grouting Pipe axis side
To external force is applied, when external force is greater than shear pin bearing capacity, shear pin is broken and removes recyclable Grouting Pipe, then to Grouting Pipe
It is cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046106.XA CN109184616B (en) | 2018-09-07 | 2018-09-07 | Double-hole pipe grouting plugging device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046106.XA CN109184616B (en) | 2018-09-07 | 2018-09-07 | Double-hole pipe grouting plugging device and using method thereof |
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| Publication Number | Publication Date |
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| CN109184616A true CN109184616A (en) | 2019-01-11 |
| CN109184616B CN109184616B (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811046106.XA Active CN109184616B (en) | 2018-09-07 | 2018-09-07 | Double-hole pipe grouting plugging device and using method thereof |
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| CN112855068B (en) * | 2021-01-19 | 2022-06-03 | 中煤科工集团重庆研究院有限公司 | Drill rod type hole packer |
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| CN109184616B (en) | 2021-06-08 |
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Effective date of registration: 20210519 Address after: 163000 No.4, Beiyi Road, Huoju village, Saertu District, Daqing City, Heilongjiang Province Applicant after: DALIAN SHENGWEI MACHINERY MANUFACTURING Co.,Ltd. Address before: 528000 203v, 2nd floor, building 1, Fengshou street, Chaoan South Road, zumiao street, Chancheng District, Foshan City, Guangdong Province Applicant before: FOSHAN CHANCHENG NUOGAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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