CN210069504U - Leakage protection device for pressure pipeline - Google Patents
Leakage protection device for pressure pipeline Download PDFInfo
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- CN210069504U CN210069504U CN201920443003.0U CN201920443003U CN210069504U CN 210069504 U CN210069504 U CN 210069504U CN 201920443003 U CN201920443003 U CN 201920443003U CN 210069504 U CN210069504 U CN 210069504U
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- siphunculus
- casing
- oil
- output
- protection device
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- 238000007789 sealing Methods 0.000 claims abstract description 38
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 241001330002 Bambuseae Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 241000238631 Hexapoda Species 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 10
- 210000001503 joint Anatomy 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 54
- 230000005540 biological transmission Effects 0.000 description 15
- 230000005611 electricity Effects 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000270322 Lepidosauria Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses a leakage protection device for pipeline under pressure, which comprises a housin, the fixed input siphunculus of inlaying of left surface of casing, the fixed output siphunculus of inlaying of right flank of casing, normally open solenoid valve has been placed to the inside of casing, normally open solenoid valve's input and the fixed intercommunication of the right-hand member of input siphunculus, normally open solenoid valve's output and the fixed intercommunication of the left end of output siphunculus, the left end of input siphunculus and the right-hand member of output siphunculus all overlap and are equipped with sealing cap. The leakage protection device can be quickly installed on a pipeline in a butt joint mode through the designed sealing cap and the designed sealing ring, the installation steps are simplified, the technical requirements of installation are reduced, manpower and installation time are greatly saved, the installation cost is saved, the signal intensity of the signal end of the electromagnetic valve control module can be adjusted through the matching work of the potentiometer and the potentiometer rotating rod, threshold value setting of pipeline leakage is achieved, and the use limitation of the leakage protection device is reduced.
Description
Technical Field
The utility model relates to the technical field of pipelines, specifically a leak protection device for pipeline under pressure.
Background
The pipeline is a device for conveying gas, liquid or fluid with solid particles, which is formed by connecting pipes, pipe connectors, valves and the like, generally, the fluid flows from a high-pressure part to a low-pressure part of the pipeline after being pressurized by a blower, a compressor, a pump, a boiler and the like, and can also be conveyed by utilizing the pressure or gravity of the fluid, the pipeline has wide application range, is mainly used for water supply, water drainage, heat supply, gas supply, long-distance petroleum, natural gas conveying, agricultural irrigation, hydraulic engineering and various industrial devices, and the leakage protection device for the pressure pipeline is provided in the technology.
The leakage protection device for the pressure pipeline is a device which can timely close a valve when the pipeline leaks to avoid medium leakage in the pipeline, the installation process of the leakage protection device for the pressure pipeline in the current market is complex, the technical requirement for installation is complex, the use limitation is high, the engineering period is prolonged, manpower is wasted, the installation cost is increased, and for the purpose, the leakage protection device for the pressure pipeline is provided to solve the problems.
SUMMERY OF THE UTILITY MODEL
One) technical problem to be solved
The utility model aims at providing a leakage protection device for pipeline under pressure in order to compensate the not enough of prior art.
II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a leakage protection device for pipeline under pressure, includes the casing, the left surface of casing is fixed to be inlayed and is had the input siphunculus, the right flank of casing is fixed to be inlayed and is had the output siphunculus, normally open solenoid valve has been placed to the inside of casing, normally open solenoid valve's input and the fixed intercommunication of the right-hand member of input siphunculus, normally open solenoid valve's output and the fixed intercommunication of the left end of output siphunculus, the left end of input siphunculus and the right-hand member of output siphunculus all overlap and are equipped with sealing cap, two sealing cap's inner wall all overlaps and is equipped with the sealing ring, two sealing cap's inner wall respectively with the surface of input siphunculus and the surface threaded connection of output siphunculus, two a side that sealing cap kept away from each other is all seted up with the first through-hole, the inner wall of the output through pipe is provided with a second through hole, the outer fixed surface of the output through pipe is communicated with a sealing barrel, the inside of the sealing barrel is provided with an oil collecting groove, the inside of the sealing barrel is provided with an oil collecting hole, the inside of the sealing barrel is fixedly embedded with a group of sealing rings, the inside of the sealing barrel is sleeved with a transmission rod, the bottom end of the transmission rod penetrates through the second through hole and extends to the lower part of the second through hole, the bottom end of the transmission rod is fixedly connected with an impeller, the top end of the transmission rod penetrates through the oil collecting groove and extends to the upper part of the sealing barrel, the inside of the oil collecting groove is provided with a thrust ring, the inner wall of the thrust ring is fixedly connected with the outer surface of the transmission rod, the top end of the transmission rod is fixedly connected with a magnet, the outer sleeve of the magnet is provided with a, the inner wall of casing is fixed to be inlayed and is had solenoid valve control module, the third through-hole has been seted up to the upper surface of casing, the interior roof fixedly connected with potentiometre of casing, the coil passes through the wire and is linked with the signal end of solenoid valve control module and the input end electricity of potentiometre respectively, the output of potentiometre passes through the wire and is connected with the signal end electricity of solenoid valve control module, the control end of solenoid valve control module passes through the wire and is connected with normally open the solenoid valve electricity.
Furthermore, the upper surface of the potentiometer is fixedly connected with a potentiometer rotating rod, and the top end of the potentiometer rotating rod penetrates through the third through hole and extends to the upper side of the shell.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can adjust the signal intensity of the signal end of the electromagnetic valve control module through the matching work of the potentiometer and the potentiometer rotating rod, and can realize the threshold value setting of the pipeline leakage rate.
Furthermore, an oil guide pipe is arranged inside the shell, and the left end of the oil guide pipe is fixedly communicated with the right end of the oil collecting hole.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can supply oil to the oil collecting tank through the designed oil guide pipe and the oil collecting hole, so that the lubricating effect between the transmission rod and the sealing cylinder is realized.
Further, the inner top wall of the shell is fixedly connected with an oil storage box, and the bottom surface of the oil storage box is fixedly communicated with the top end of the oil guide pipe.
Through adopting above-mentioned technical scheme, make a leak protection device for pipeline under pressure can store lubricating oil through the oil storage box of its design, keep the operating stability of this device, reduce the maintenance number of times, practice thrift the manpower.
Further, the fixed surface of casing inlays and has adds oil pipe, add the fixed surface intercommunication of the bottom of oil pipe and oil storage box, the top of adding oil pipe extends to the top of casing, the top cover of adding oil pipe is equipped with the protection against insects cap.
Through adopting above-mentioned technical scheme, make a leak protection device for pipeline under pressure can through the more swift convenient filling lubricating oil of the oil filler pipe of its design, prevent through protection against insects cap that the reptile from entering into the oil storage box inside and block and lead oil pipe, keep the operating stability of this device.
Further, the draw-in groove has been seted up to the left surface of casing, the visor has been placed to the upper surface of casing, the right flank of visor is equipped with the hinge, the right flank of visor is articulated mutually through the right flank of hinge and casing, the left surface fixedly connected with cardboard of visor, the right flank fixedly connected with fixture block of cardboard, fixture block and draw-in groove looks joint.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can avoid the potentiometer rotary rod from being touched through the designed protective cover, keep the threshold value of the pipeline leakage rate set by the potentiometer 17 and keep the stability and the reliability of the system.
III) beneficial effects
Compared with the prior art, the leakage protection device for the pressure pipeline has the following beneficial effects:
firstly, the method comprises the following steps: the utility model discloses a sealed cap and the sealing washer of its design can make this leakage protection device dock fast and install on the pipeline, simplified its installation procedure, reduced the technical requirement of its installation, very big manpower and installation time of having saved, practiced thrift the installation cost, cooperation work through potentiometre and potentiometre swing arm, the signal strength of the signal end of adjustable solenoid valve control module realizes the threshold value settlement to pipeline leakage rate, reduced its use limitation, improve its performance.
Secondly, the method comprises the following steps: the utility model discloses an oil storage box, oil pipe and the lubricated effect between oil collecting tank realization transfer line and the sealed section of thick bamboo of its design keep the operating stability of this device, reduce the maintenance number of times, practice thrift the manpower, avoid the potentiometre swing arm to receive the touching through the visor of its design, keep the pipeline leakage rate's that the potentiometre set up threshold value, keep the stability and the reliability of this system.
Drawings
Fig. 1 is a cross-sectional view of a leakage protection device for a pressure line according to the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;
fig. 3 is an enlarged schematic view of the structure at B in fig. 1 according to the present invention.
In the figure: 1. a housing; 2. an impeller; 3. an output through pipe; 4. a sealing cap; 5. a seal ring; 6. a first through hole; 7. a normally open solenoid valve; 8. inputting a through pipe; 9. a pressure line; 10. a transmission rod; 11. a second through hole; 12. an oil guide pipe; 13. an oil storage box; 14. a hinge; 15. an oil filler tube; 16. an insect-proof cap; 17. a potentiometer; 18. a potentiometer rotating rod; 19. a third through hole; 20. A protective cover; 21. a solenoid valve control module; 22. clamping a plate; 23. a sealing cylinder; 24. a thrust ring; 25. an oil sump; 26. an oil collecting hole; 27. a seal ring; 28. a coil; 29. a magnet; 30. An insulating cylinder; 31. a clamping block; 32. a clamping groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-3, the utility model provides a technical solution: a leakage protection device for pressure pipeline comprises a shell 1, an input through pipe 8 is fixedly embedded on the left side surface of the shell 1, an output through pipe 3 is fixedly embedded on the right side surface of the shell 1, a normally open solenoid valve 7 is placed in the shell 1, the input end of the normally open solenoid valve 7 is fixedly communicated with the right end of the input through pipe 8, the output end of the normally open solenoid valve 7 is fixedly communicated with the left end of the output through pipe 3, sealing caps 4 are respectively sleeved on the left end of the input through pipe 8 and the right end of the output through pipe 3, sealing rings 5 are respectively sleeved on the inner walls of the two sealing caps 4, the inner walls of the two sealing caps 4 are respectively in threaded connection with the outer surfaces of the input through pipe 8 and the output through pipe 3, a first through hole 6 is respectively formed in one side surface, away from each other, a pressure pipeline 9 is respectively sleeved inside the input through pipe 8 and the output through pipe 3, one end, away from each other end of, the inner wall of the output through pipe 3 is provided with a second through hole 11, the outer surface of the output through pipe 3 is fixedly communicated with a sealing cylinder 23, the inside of the sealing cylinder 23 is provided with an oil collecting groove 25, the inside of the sealing cylinder 23 is provided with an oil collecting hole 26, the inside of the sealing cylinder 23 is fixedly embedded with a group of sealing rings 27, the inside of the sealing cylinder 23 is sleeved with a transmission rod 10, the bottom end of the transmission rod 10 penetrates through the second through hole 11 and extends to the lower part of the second through hole 11, the bottom end of the transmission rod 10 is fixedly connected with an impeller 2, the top end of the transmission rod 10 penetrates through the oil collecting groove 25 and extends to the upper part of the sealing cylinder 23, the inside of the oil collecting groove 25 is provided with a thrust ring 24, the inner wall of the thrust ring 24 is fixedly connected with the outer surface of the transmission rod 10, the top end of the transmission rod 10 is fixedly connected with a magnet 29, the outside, the fixed solenoid valve control module 21 that inlays of inner wall of casing 1, third through hole 19 has been seted up to the upper surface of casing 1, the interior roof fixedly connected with potentiometre 17 of casing 1, coil 28 passes through the wire and links with the signal end of solenoid valve control module 21 and the input end electricity of potentiometre 17 respectively, the output of potentiometre 17 passes through the wire and is connected with the signal end electricity of solenoid valve control module 21, solenoid valve control module 21's control end passes through the wire and is connected with normally open solenoid valve 7 electricity.
Further, a potentiometer rotating rod 18 is fixedly connected to the upper surface of the potentiometer 17, and the top end of the potentiometer rotating rod 18 penetrates through the third through hole 19 and extends to the upper side of the housing 1.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can adjust the signal intensity of the signal end of the electromagnetic valve control module 21 through the matching work of the potentiometer 17 and the potentiometer rotary rod 18, and can realize the threshold value setting of the pipeline leakage rate.
Further, an oil guide pipe 12 is arranged inside the housing 1, and the left end of the oil guide pipe 12 is fixedly communicated with the right end of the oil collecting hole 26.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can supply oil to the oil collecting tank 25 through the designed oil guide pipe 12 and the oil collecting hole 26, and the lubricating effect between the transmission rod 10 and the sealing cylinder 23 is realized.
Further, the inner top wall of the housing 1 is fixedly connected with an oil storage box 13, and the bottom surface of the oil storage box 13 is fixedly communicated with the top end of the oil guide pipe 12.
Through adopting above-mentioned technical scheme, make a leak protection device for pipeline under pressure can store lubricating oil through the oil storage box 13 of its design, keep the operating stability of this device, reduce the maintenance number of times, practice thrift the manpower.
Further, an oil filling pipe 15 is fixedly embedded on the upper surface of the shell 1, the bottom end of the oil filling pipe 15 is fixedly communicated with the upper surface of the oil storage box 13, the top end of the oil filling pipe 15 extends to the upper side of the shell 1, and an insect prevention cap 16 is sleeved on the top end of the oil filling pipe 15.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can fill lubricating oil more quickly and conveniently through the designed oil filling pipe 15, and prevents a crawler from entering the oil storage box 13 through the insect-proof cap 16 to block the oil guide pipe 12, so that the running stability of the device is maintained.
Further, draw-in groove 32 has been seted up to casing 1's left surface, and visor 20 has been placed to casing 1's upper surface, and visor 20's right flank is equipped with hinge 14, and visor 20's right flank is articulated mutually through hinge 14 and casing 1's right flank, and visor 20's left surface fixedly connected with cardboard 22, cardboard 22's right flank fixedly connected with fixture block 31, fixture block 31 and draw-in groove 32 joint mutually.
By adopting the technical scheme, the leakage protection device for the pressure pipeline can prevent the potentiometer rotary rod 18 from being touched through the designed protective cover 20, maintain the threshold value of the pipeline leakage rate set by the potentiometer 17, and maintain the stability and reliability of the system.
The working principle is as follows: pressure pipe 9 is linked together with normally open solenoid valve 7 through input siphunculus 8 and output siphunculus 3 respectively, realize quick butt joint and sealed function through sealing ring 5 and sealing cap 4, when the medium in pressure pipe 9 reveals, the medium in pressure pipe 9 can flow at a high speed, then drive the impeller 2 high-speed rotation that sets up in the output siphunculus 3, transfer line 10 and magnet 29 rotate at a high speed together simultaneously, will produce the voltage in the coil 28, after produced voltage is analyzed and detected by relay control module 21, normally open solenoid valve 7 of operatable makes it close, realize preventing the function of the medium leakage in pressure pipe 9, cooperation through potentiometre 17 and potentiometre swing arm 18 works, the signal intensity of the signal end of adjustable solenoid valve control module 21, and realize the threshold setting to pressure pipe 9 leakage rate.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A leakage protection device for pressure pipes, comprising a housing (1), characterized in that: the left surface of casing (1) is fixed to be inlayed and is had input siphunculus (8), the right flank of casing (1) is fixed to be inlayed and is had output siphunculus (3), normally open solenoid valve (7) have been placed to the inside of casing (1), the input of normally open solenoid valve (7) and the fixed intercommunication of the right-hand member of input siphunculus (8), the output of normally open solenoid valve (7) and the fixed intercommunication of the left end of output siphunculus (3), the left end of input siphunculus (8) and the right-hand member of output siphunculus (3) all overlap and are equipped with sealing cap (4), two the inner wall of sealing cap (4) all overlaps and is equipped with sealing ring (5), two the inner wall of sealing cap (4) respectively with the surface of input siphunculus (8) and the surface threaded connection of output siphunculus (3), two, the inside of input siphunculus (8) and the inside of output siphunculus (3) all overlap and be equipped with pipeline under pressure (9), two pipeline under pressure (9) one end of keeping away from each other all runs through first through-hole (6) and extend to the outside of through-hole (6), second through-hole (11) have been seted up to the inner wall of output siphunculus (3), the external fixed surface intercommunication of output siphunculus (3) has sealed section of thick bamboo (23), oil sump (25) have been seted up to the inside of sealed section of thick bamboo (23), oil trap (26) have been seted up to the inside of sealed section of thick bamboo (23), the inside fixed of sealed section of thick bamboo (23) is inlayed and is had a set of sealing washer (27), the inside cover of sealed section of thick bamboo (23) is equipped with transfer line (10), the bottom of transfer line (10) is run through second through-hole (11) and is extended to the below, the top of transfer line (10) runs through oil trap (25) and extends to the top of a sealed section of thick bamboo (23), the inside of oil trap (25) is equipped with thrust collar (24), the outer fixed surface who is connected of the inner wall of thrust collar (24) and transfer line (10), the top fixedly connected with magnet (29) of transfer line (10), the outside cover of magnet (29) is equipped with coil (28), the outer fixed surface of coil (28) is connected with insulator (30), the bottom of insulator (30) and the upper fixed surface of a sealed section of thick bamboo (23) are connected, the inner wall fixed of casing (1) is inlayed and is had solenoid valve control module (21), third through-hole (19) has been seted up to the upper surface of casing (1), interior roof fixedly connected with potentiometre (17) of casing (1), coil (28) are linked with the signal terminal of solenoid valve control module (21) and the input end of potentiometre (17) respectively through the wire, the output end of the potentiometer (17) is electrically connected with the signal end of the electromagnetic valve control module (21) through a lead, and the control end of the electromagnetic valve control module (21) is electrically connected with the normally open electromagnetic valve (7) through a lead.
2. A leak protection device for a pressure conduit according to claim 1, wherein: the upper surface of the potentiometer (17) is fixedly connected with a potentiometer rotating rod (18), and the top end of the potentiometer rotating rod (18) penetrates through the third through hole (19) and extends to the upper side of the shell (1).
3. A leak protection device for a pressure conduit according to claim 1, wherein: an oil guide pipe (12) is arranged in the shell (1), and the left end of the oil guide pipe (12) is fixedly communicated with the right end of the oil collecting hole (26).
4. A leak protection device for a pressure conduit according to claim 1, wherein: the inner top wall of the shell (1) is fixedly connected with an oil storage box (13), and the bottom surface of the oil storage box (13) is fixedly communicated with the top end of the oil guide pipe (12).
5. A leak protection device for a pressure conduit according to claim 1, wherein: the fixed surface of casing (1) inlays and has adds oil pipe (15), add the fixed surface intercommunication of the bottom of oil pipe (15) and oil storage box (13), the top of adding oil pipe (15) extends to the top of casing (1), the top cover of adding oil pipe (15) is equipped with protection against insects cap (16).
6. A leak protection device for a pressure conduit according to claim 1, wherein: draw-in groove (32) have been seted up to the left surface of casing (1), visor (20) have been placed to the upper surface of casing (1), the right flank of visor (20) is equipped with hinge (14), the right flank of visor (20) is articulated mutually through hinge (14) and the right flank of casing (1), the left surface fixedly connected with cardboard (22) of visor (20), the right flank fixedly connected with fixture block (31) of cardboard (22), fixture block (31) and draw-in groove (32) looks joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920443003.0U CN210069504U (en) | 2019-04-03 | 2019-04-03 | Leakage protection device for pressure pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920443003.0U CN210069504U (en) | 2019-04-03 | 2019-04-03 | Leakage protection device for pressure pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210069504U true CN210069504U (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920443003.0U Active CN210069504U (en) | 2019-04-03 | 2019-04-03 | Leakage protection device for pressure pipeline |
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| Country | Link |
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| CN (1) | CN210069504U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503528A (en) * | 2020-04-27 | 2020-08-07 | 简再东 | Gas safety protection device |
| CN117590119A (en) * | 2023-11-22 | 2024-02-23 | 威胜能源技术股份有限公司 | Energy-saving photovoltaic inverter testing system and application method thereof |
-
2019
- 2019-04-03 CN CN201920443003.0U patent/CN210069504U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503528A (en) * | 2020-04-27 | 2020-08-07 | 简再东 | Gas safety protection device |
| CN117590119A (en) * | 2023-11-22 | 2024-02-23 | 威胜能源技术股份有限公司 | Energy-saving photovoltaic inverter testing system and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210804 Address after: 730000 No. 528, west section of Huanghe Avenue, Lanzhou New Area, Lanzhou City, Gansu Province Patentee after: LANZHOU LS HEAVY EQUIPMENT Corp.,Ltd. Address before: 730000 Lanshi equipment Industrial Park, No. 528, Huanghe Avenue, Lanzhou New Area, Lanzhou City, Gansu Province Patentee before: Yu Junjie |
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| TR01 | Transfer of patent right |