CN114112242B - Natural gas conveying pipeline gas leakage detection device convenient to remove - Google Patents
Natural gas conveying pipeline gas leakage detection device convenient to remove Download PDFInfo
- Publication number
- CN114112242B CN114112242B CN202111442545.4A CN202111442545A CN114112242B CN 114112242 B CN114112242 B CN 114112242B CN 202111442545 A CN202111442545 A CN 202111442545A CN 114112242 B CN114112242 B CN 114112242B
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- natural gas
- fixedly connected
- plate
- pipeline
- gas pipeline
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 239000003345 natural gas Substances 0.000 title claims abstract description 63
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 title abstract description 14
- 238000001125 extrusion Methods 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000007723 transport mechanism Effects 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 4
- 238000012958 reprocessing Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Pipeline Systems (AREA)
Abstract
The invention relates to the technical field of gas detection, and discloses a natural gas conveying pipeline gas leakage detection device convenient to move, which comprises a mounting frame, a conveying belt and a gas leakage detection device, wherein the mounting frame is arranged above the conveying belt; the two ends of the natural gas pipeline are provided with the extrusion plates, the natural gas pipeline is sealed, the connecting pipe on the air pump penetrates through the extrusion plates and is positioned in the natural gas pipeline, one side of one of the extrusion plates, which is positioned in the natural gas pipeline, is embedded with the first pressure sensor, the other side of the extrusion plate is embedded with the controller corresponding to the first pressure sensor, and the air tightness of the pipeline can be detected to judge whether the pipeline is qualified or not; through threaded connection C template on the second threaded rod of one of them stripper plate, the first electricity push rod outer end fixed connection semicircle casing at C template both ends, the connecting block of C template upper end and the sliding connection of sliding port of mounting panel, can detect out which one section gas leakage of natural gas line, the subsequent reprocessing of being convenient for.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a gas leakage detection device of a natural gas conveying pipeline, which is convenient to move.
Background
Natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the atmosphere, water and rock circles.
The existing natural gas pipeline is directly transported to an installation place for installation after being processed and molded, the air tightness of the existing natural gas pipeline is generally not detected, and after the existing natural gas pipeline is installed and used, the situations such as natural gas leakage and the like are likely to occur.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a natural gas conveying pipeline air leakage detection device convenient to move, so as to solve the problems of the background art.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a natural gas pipeline gas leakage detection device convenient to remove, include the conveyer belt and be located the mounting bracket of conveyer belt top, be provided with transport mechanism on the mounting bracket, transport mechanism both ends fixedly connected with and the stripper plate that natural gas pipeline both ends correspond, mounting bracket one side is provided with the air pump, the intercommunication is provided with the connecting pipe on the air pump, connecting pipe one end runs through the stripper plate and is located natural gas pipeline, one of them stripper plate is located one side of pipeline and inlays and be equipped with first pressure sensor, this stripper plate opposite side inlays and is equipped with the controller that corresponds with first pressure sensor, transport mechanism below is provided with detection mechanism.
Further, transport mechanism includes the mounting panel, mounting panel upper end fixedly connected with cylinder, and spout has been seted up to cylinder and mounting bracket fixed connection, and spout internal rotation is connected with first threaded rod, and first motor of mounting panel one end fixedly connected with, first motor output and first threaded rod fixed connection, threaded connection has two backup pads on the first threaded rod, backup pad and spout sliding connection, backup pad and its extrusion board fixed connection who corresponds.
Further, the first threaded rod consists of two connecting rods with opposite thread directions, and the connecting pipe is a telescopic hose.
Further, detection mechanism includes with one of them stripper plate fixed connection's second motor and with this stripper plate rotate the second threaded rod of being connected, second motor output and second threaded rod fixed connection, threaded connection has the C template on the second threaded rod, the inboard first electric putter of fixedly connected with in C template both ends, first electric putter outer end fixedly connected with assorted semicircle casing.
Further, the C-shaped plate upper end fixedly connected with connecting block, the sliding port has been seted up to the mounting panel lower extreme, connecting block and sliding connection of sliding port.
Further, a second pressure sensor is embedded in the inner wall of a semicircular shell, a second electric push rod is embedded in the inner wall of the semicircular shell, a spray gun is further embedded in the inner wall of the semicircular shell, a nozzle of the spray gun is positioned on one side of the second electric push rod and provided with an opening, a groove is formed in the inner wall of the opening, and a sliding block fixedly connected with the second electric push rod is slidably connected in the groove.
Further, one side of the C-shaped plate is fixedly connected with a clip, and a paint bottle communicated with the spray gun is clamped in the clip
Further, the rubber pads are embedded in the side, located on the natural gas pipeline, of the extrusion plate and the side, located on the pipeline, of the semicircular shell.
(III) beneficial effects
Compared with the prior art, the invention has the following beneficial effects:
1. According to the invention, the two ends of the pipeline are provided with the extrusion plates to seal the natural gas pipeline, the connecting pipe on the air pump penetrates through the extrusion plates and is positioned in the natural gas pipeline, one side of one of the extrusion plates positioned in the natural gas pipeline is embedded with the first pressure sensor, the other side of the extrusion plate is embedded with the controller corresponding to the first pressure sensor, and the air tightness of the natural gas pipeline can be detected to judge whether the natural gas pipeline is qualified or not.
2. According to the invention, the C-shaped plate is connected with the second threaded rod of one of the extrusion plates in a threaded manner, the outer ends of the first electric push rods at the two ends of the C-shaped plate are fixedly connected with the semicircular shell, and the connecting block at the upper end of the C-shaped plate is in sliding connection with the sliding port of the mounting plate, so that which section of the natural gas pipeline leaks gas can be detected, and the subsequent reprocessing treatment is facilitated.
3. According to the invention, the second pressure sensor is embedded in the inner wall of one of the semicircular shells, the spray gun is embedded in the inner wall of the semicircular shell, the groove is formed in the inner wall of the opening in the nozzle of the spray gun, and the outer end of the second electric push rod in the semicircular shell is fixedly connected with the sliding block which is in sliding connection with the groove, so that the position where the air leakage is detected can be marked conveniently.
Drawings
FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1C;
FIG. 3 is a schematic view of the whole three-dimensional cross-section structure of the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3A;
FIG. 5 is a schematic perspective sectional view showing another state of the whole of the present invention;
FIG. 6 is an enlarged schematic view of the structure of FIG. 5B;
FIG. 7 is a schematic view of the overall partial perspective cross-sectional structure of the present invention;
FIG. 8 is an enlarged schematic view of the structure of D in FIG. 7;
fig. 9 is a schematic perspective sectional view showing still another state of the whole of the present invention.
In the figure: 1. a mounting frame; 2. a cylinder; 3. a mounting plate; 4. a conveyor belt; 5. a pipe; 6. a support plate; 7. an air pump; 8. a connecting pipe; 9. an extrusion plate; 10. a first pressure sensor; 11. a first motor; 12. a second motor; 13. a second threaded rod; 14. a controller; 15. a chute; 16. a first threaded rod; 17. a sliding port; 18. a connecting block; 19. a C-shaped plate; 20. a first electrical push rod; 21. a semicircular shell; 22. a paint bottle; 23. a clip; 24. a second pressure sensor; 25. a spray gun; 26. a second electric push rod; 27. an opening; 28. a groove; 29. a sliding block.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-9, a gas leakage detection device for a natural gas conveying pipeline convenient to move comprises a conveying belt 4 and a mounting frame 1 positioned above the conveying belt 4, wherein a conveying mechanism is arranged on the mounting frame 1, two ends of the conveying mechanism are fixedly connected with squeeze plates 9 corresponding to two ends of the natural gas pipeline 5, one side of the mounting frame 1 is provided with an air pump 7, the air pump 7 is communicated with a connecting pipe 8, one end of the connecting pipe 8 penetrates through the squeeze plates 9 and is positioned in the natural gas pipeline 5, a first pressure sensor 10 is embedded in one side of one squeeze plate 9 positioned in the natural gas pipeline 5, and a controller 14 corresponding to the first pressure sensor 10 is embedded in the other side of the squeeze plate 9; the conveying mechanism comprises a mounting plate 3, the upper end of the mounting plate 3 is fixedly connected with a cylinder 2, the cylinder 2 is fixedly connected with a mounting frame 1, the lower end of the mounting plate 3 is provided with a sliding groove 15, the sliding groove 15 is rotationally connected with a first threaded rod 16, one end of the mounting plate 3 is fixedly connected with a first motor 11, the output end of the first motor 11 is fixedly connected with the first threaded rod 16, two supporting plates 6 are in threaded connection with the first threaded rod 16, the supporting plates 6 are in sliding connection with the sliding groove 15, the supporting plates 6 are fixedly connected with the corresponding extruding plates 9, the positions of the two extruding plates 9 are convenient to adjust, the tightness of a natural gas pipeline 5 on a conveying belt 4 can be detected, the first threaded rod 16 is composed of two connecting rods with opposite thread directions, and the connecting pipe 8 is a telescopic hose, so that the two extruding plates 9 can move oppositely or backwards at the same time; the detection mechanism is arranged below the conveying mechanism and comprises a second motor 12 fixedly connected with one of the extrusion plates 9 and a second threaded rod 13 rotationally connected with the extrusion plate 9, the output end of the second motor 12 is fixedly connected with the second threaded rod 13, a C-shaped plate 19 is connected to the second threaded rod 13 in a threaded manner, the upper end of the C-shaped plate 19 is fixedly connected with a connecting block 18, the lower end of the mounting plate 3 is provided with a sliding opening 17, the connecting block 18 is in sliding connection with the sliding opening 17, when the C-shaped plate 19 moves, the C-shaped plate 19 can be limited, the inner sides of the two ends of the C-shaped plate 19 are fixedly connected with first electric push rods 20, the outer ends of the first electric push rods 20 are fixedly connected with semicircular shells 21, which section of the natural gas pipeline 5 is easy to reprocess, rubber pads are embedded in the side of the extrusion plate 9, which is located on the side of the natural gas pipeline 5, abrasion of the natural gas pipeline 5 is avoided, and the sealing effect is good; one of them semicircle casing 21 inner wall inlays and is equipped with second pressure sensor 24, this semicircle casing 21 inner wall inlays and is equipped with second electric putter 26, this semicircle casing 21 inner wall still inlays and is equipped with spray gun 25, the nozzle of spray gun 25 is located second electric putter 26 one side and has seted up opening 27, opening 27 inner wall is seted up flutedly 28, sliding connection has the slider 29 with second electric putter 26 fixed connection in recess 28, be convenient for mark the position of detecting the gas leakage, C template 19 one side fixedly connected with clip 23, the joint has the coating bottle 22 with spray gun 25 intercommunication in the clip 23, be convenient for provide the coating to spray gun 25 in.
Working principle: when the natural gas pipeline conveying device works, when the conveyor belt 4 conveys the natural gas pipeline 5 to the position above the mounting frame 1, the natural gas pipeline conveying device stops working, then the air cylinder 2 is started to work, the air cylinder 2 drives the mounting plate 3 to move downwards, the mounting plate 3 drives the mounting plate 6 to move downwards, the mounting plate 6 drives the extrusion plate 9 to move downwards, and when the extrusion plates 9 are positioned on two sides of the natural gas pipeline 5, the air cylinder 2 stops working; then the first motor 11 is started to work, so that the first threaded rod 16 rotates to drive the two support plates 6 to move in opposite directions until the extrusion plate 9 abuts against the natural gas pipeline 5, when the extrusion plate 9 abuts against the natural gas pipeline 5, the semicircular shell 21 moves to the outer side of the natural gas pipeline 5 at the same time, the first motor 11 stops working, and the natural gas pipeline 5 is sealed; then, the air pump 7 is started to charge the natural gas pipeline 5, the air pump 7 is closed, the first pressure sensor 10 is opened after a period of time, if the air tightness of the natural gas pipeline 5 is not problematic, the first pressure sensor 10 starts the first motor 11 to rotate reversely through the controller 14, so that the two extrusion plates 9 move in opposite directions and are separated from the natural gas pipeline 5; if the tightness of the natural gas pipeline 5 is problematic, the first pressure sensor 10 senses the pressure change in the natural gas pipeline 5, and the first electric push rod 20 is started to work, so that the two semicircular shells 21 move and are propped against each other; then, the air pump 7 is continuously started to charge the natural gas pipeline 5, if the second pressure sensor 24 in the semicircular shell 21 senses pressure change, the second electric push rod 26 is started to shrink, the sliding block 29 is driven to slide in the groove 28, and the paint in the spray gun 25 is sprayed onto the natural gas pipeline 5 for marking, so that the subsequent reprocessing treatment is facilitated; if the second pressure sensor 24 does not sense the pressure change, the first electric push rod 20 contracts to reset the semicircular shell 21, then the second motor 12 is started to drive the second threaded rod 13 to rotate, so that the C-shaped plate 19 moves, the C-shaped plate 19 drives the two semicircular shells 21 to move in the moving process, and meanwhile, the connecting block 18 slides in the sliding port 17; the first electric push rod 20 is then continued to be started, and each section of the natural gas pipeline 5 is tested for tightness according to the above-described steps.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a natural gas conveying pipeline leakage detection device convenient to remove, including conveyer belt (4) and be located mounting bracket (1) of conveyer belt (4) top, a serial communication port, be provided with transport mechanism on mounting bracket (1), transport mechanism both ends fixedly connected with squeeze plate (9) that correspond with natural gas pipeline (5) both ends, mounting bracket (1) one side is provided with air pump (7), the intercommunication is provided with connecting pipe (8) on air pump (7), connecting pipe (8) one end runs through squeeze plate (9) and is located natural gas pipeline (5), one side that one squeeze plate (9) is located natural gas pipeline (5) is inlayed and is equipped with first pressure sensor (10), controller (14) that correspond with first pressure sensor (10) are inlayed to this squeeze plate (9) opposite side, transport mechanism below is provided with detection mechanism; the detection mechanism comprises a second motor (12) fixedly connected with one of the extrusion plates (9) and a second threaded rod (13) rotationally connected with the extrusion plate (9), the output end of the second motor (12) is fixedly connected with the second threaded rod (13), a C-shaped plate (19) is connected to the second threaded rod (13) in a threaded manner, first electric push rods (20) are fixedly connected to the inner sides of the two ends of the C-shaped plate (19), and the outer ends of the first electric push rods (20) are fixedly connected with matched semicircular shells (21); the second pressure sensor (24) is embedded in the inner wall of the semicircular shell (21), the second electric push rod (26) is embedded in the inner wall of the semicircular shell (21), the spray gun (25) is embedded in the inner wall of the semicircular shell (21), an opening (27) is formed in one side of the second electric push rod (26) through a nozzle of the spray gun (25), a groove (28) is formed in the inner wall of the opening (27), and a sliding block (29) fixedly connected with the second electric push rod (26) is connected in a sliding mode in the groove (28).
2. The natural gas conveying pipeline leakage detection device convenient to move according to claim 1, wherein the conveying mechanism comprises a mounting plate (3), an air cylinder (2) is fixedly connected to the upper end of the mounting plate (3), the air cylinder (2) is fixedly connected with a mounting frame (1), a sliding groove (15) is formed in the lower end of the mounting plate (3), a first threaded rod (16) is rotationally connected to the sliding groove (15), a first motor (11) is fixedly connected to one end of the mounting plate (3), the output end of the first motor (11) is fixedly connected with the first threaded rod (16), two supporting plates (6) are connected to the first threaded rod (16) in a threaded mode, the supporting plates (6) are slidably connected with the sliding groove (15), and the supporting plates (6) are fixedly connected with extrusion plates (9) corresponding to the same.
3. A natural gas transportation pipeline leakage detection apparatus convenient to move according to claim 2, characterized in that the first threaded rod (16) consists of two connecting rods with opposite thread directions, and the connecting pipe (8) is a telescopic hose.
4. A natural gas conveying pipeline leakage detecting device convenient to move according to any one of claims 1 to 3, wherein a connecting block (18) is fixedly connected to the upper end of a C-shaped plate (19), a sliding opening (17) is formed in the lower end of the mounting plate (3), and the connecting block (18) is in sliding connection with the sliding opening (17).
5. The natural gas conveying pipeline leakage detection device convenient to move according to claim 4, wherein a clamp (23) is fixedly connected to one side of the C-shaped plate (19), and a paint bottle (22) communicated with a spray gun (25) is clamped in the clamp (23).
6. The natural gas conveying pipeline leakage detection device convenient to move according to claim 1, wherein the extruding plate (9) is arranged on one side of the natural gas pipeline (5) and the semicircular shell (21) is arranged on one side of the natural gas pipeline (5) in an embedded manner.
7. A natural gas conveying pipeline leakage detecting device convenient to move according to claim 2 or 3, wherein the extruding plate (9) is arranged on one side of the natural gas pipeline (5) and the semicircular shell (21) is arranged on one side of the natural gas pipeline (5) in an embedded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111442545.4A CN114112242B (en) | 2021-11-30 | 2021-11-30 | Natural gas conveying pipeline gas leakage detection device convenient to remove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111442545.4A CN114112242B (en) | 2021-11-30 | 2021-11-30 | Natural gas conveying pipeline gas leakage detection device convenient to remove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114112242A CN114112242A (en) | 2022-03-01 |
| CN114112242B true CN114112242B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111442545.4A Active CN114112242B (en) | 2021-11-30 | 2021-11-30 | Natural gas conveying pipeline gas leakage detection device convenient to remove |
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| CN (1) | CN114112242B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114923134B (en) * | 2022-06-29 | 2023-06-30 | 重庆重科大分析仪器有限公司 | Natural gas pipeline conveying gas leakage detection device |
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| CN210571233U (en) * | 2019-10-15 | 2020-05-19 | 山东泉建工程检测有限公司 | Device for evaluating air tightness of urban drainage pipeline |
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| CN212391176U (en) * | 2020-05-28 | 2021-01-22 | 桂林新奥燃气发展有限公司 | Detection device for natural gas pipeline |
| CN214373196U (en) * | 2020-12-24 | 2021-10-08 | 黄瑞新 | City gas pipeline leakproofness detection device |
| CN214893925U (en) * | 2021-06-10 | 2021-11-26 | 西安新港分布式能源有限公司 | Device for detecting pressure of refrigeration pipeline in real time |
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| CN108398217A (en) * | 2018-02-05 | 2018-08-14 | 张桂华 | Plugging device is monitored automatically at a kind of pressure-bearing pipeline leakage |
| KR102106823B1 (en) * | 2018-05-30 | 2020-05-07 | 한국기계연구원 | Band type pipe leakage detecting apparatus and pipe leakage detecting method using the same |
| CN111208199A (en) * | 2020-02-19 | 2020-05-29 | 深圳市俊达通办公智能科技有限公司 | Ultrasonic flaw detection equipment with marking function for steel rail detection |
| CN111289622B (en) * | 2020-03-10 | 2023-05-12 | 淮阴师范学院 | Boiler pipeline ultrasonic detection device |
| CN113478010A (en) * | 2021-06-02 | 2021-10-08 | 徐州明锐车用空调有限公司 | Production and processing device for crane air-conditioning pipeline and application method thereof |
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2021
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211344811U (en) * | 2019-08-06 | 2020-08-25 | 派尔实验装备有限公司 | Ventilation system is with overhauing device |
| CN210571233U (en) * | 2019-10-15 | 2020-05-19 | 山东泉建工程检测有限公司 | Device for evaluating air tightness of urban drainage pipeline |
| CN212391176U (en) * | 2020-05-28 | 2021-01-22 | 桂林新奥燃气发展有限公司 | Detection device for natural gas pipeline |
| CN214373196U (en) * | 2020-12-24 | 2021-10-08 | 黄瑞新 | City gas pipeline leakproofness detection device |
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| CN114112242A (en) | 2022-03-01 |
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