CN113389968A - Automatic clamping and plugging device for gas pipeline and control method thereof - Google Patents
Automatic clamping and plugging device for gas pipeline and control method thereof Download PDFInfo
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- CN113389968A CN113389968A CN202110782148.5A CN202110782148A CN113389968A CN 113389968 A CN113389968 A CN 113389968A CN 202110782148 A CN202110782148 A CN 202110782148A CN 113389968 A CN113389968 A CN 113389968A
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- gas pipeline
- hot melt
- melt adhesive
- arm lock
- plugging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/1683—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of a patch which is fixed on the wall of the pipe by means of an adhesive, a weld or the like
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention relates to an automatic clamping and plugging device for a gas pipeline and a control method thereof, which are characterized in that: the hot melt adhesive sealing device comprises an automatic clamping device and a hot melt adhesive sealing device, wherein the automatic clamping device is used for fixing the hot melt adhesive sealing device and a gas pipeline; and the hot melt adhesive plugging device is used for plugging the inside and the outside of the gas pipeline by using hot melt adhesive respectively. The invention ensures that the clamping and the plugging are integrated, greatly improves the maintenance efficiency and ensures the maintenance quality.
Description
Technical Field
The invention relates to the technical field of gas pipeline plugging equipment, in particular to an automatic clamping and plugging device for a gas pipeline and a control method thereof.
Background
The gas pipe is a special pipe for conveying combustible gas, a metal gas pipe hose is used for replacing a traditional buckle mode rubber hose, the defects that the rubber hose is easy to fall off, age and bite by insects and has short service life can be overcome, the gas pipe has the advantages of being convenient to install, reliable in connection, corrosion-resistant, free of gas blockage, good in flexibility, long in service life, capable of being bent randomly without deformation and blocking gas and the like, a surface soft protective layer material has the advantages of being safer, easier to clean and attractive, the service life of the stainless steel threaded connection metal hose is 8 years, the PE gas pipe is in the municipal pipe market in China, the plastic pipe is steadily developing, the PE gas pipe, the PP-R gas pipe and the UPVC gas pipe all occupy a place, strong development of the PE pipe is quite compelling to the attention, and the application field is quite wide.
In prior art, when the gas pipeline takes place the pipeline and damages, need salvage the pipeline, current method is the inside gas evacuation of gas pipeline with the damage section, directly blocks up again, but whole shutoff process is difficult to control, and plugging device's installation is loaded down with trivial details, directly influences the shutoff efficiency of whole process to there is the gas to continue the exhaust problem of shutoff effect well.
Disclosure of Invention
The invention designs an automatic clamping and plugging device for a gas pipeline and a control method thereof, and solves the technical problems that in the prior art, the whole plugging process is difficult to control, the installation process of the plugging device is complicated, the plugging efficiency in the whole process is directly influenced, the plugging effect is poor, and gas leakage exists.
In order to solve the technical problems, the invention adopts the following scheme:
the utility model provides a gas pipeline self-holding and plugging device which characterized in that: the hot melt adhesive sealing device comprises an automatic clamping device and a hot melt adhesive sealing device, wherein the automatic clamping device is used for fixing the hot melt adhesive sealing device and a gas pipeline; and the hot melt adhesive plugging device is used for plugging the inside and the outside of the gas pipeline by using hot melt adhesive respectively.
Preferably, the automatic clamping device comprises a left fixed clamping arm (25), a right fixed clamping arm (26), a left movable clamping arm (41) and a right movable clamping arm (42), the left fixed clamping arm (25) is hinged to the left movable clamping arm (41) through a left rotating shaft (45), the right fixed clamping arm (26) is hinged to the right movable clamping arm (42) through a right rotating shaft (46), and the motor (1) acts on a transmission mechanism to enable the left movable clamping arm (41) and the right movable clamping arm (42) to clamp the gas pipeline.
Preferably, the transmission mechanism comprises a left transmission mechanism and a right transmission mechanism, the motor (1) drives the left transmission mechanism and the right transmission mechanism to respectively act on the left movable clamping arm (41) and the right movable clamping arm (42), the left movable clamping arm (41) is provided with a left elastic clamping piece (43), and the right movable clamping arm (42) is provided with a right elastic clamping piece (44).
Preferably, left side drive mechanism includes left driving medium (23), left side driving medium (23) one end is connected with left side removal arm lock (41), left side driving medium (23) other end is connected with left side removal rack (21), left side driving medium (23) middle part is connected with left lever fulcrum (27) on left fixed arm lock (25), when left side removal rack (21) horizontal migration, will make left driving medium (23) act on left side removal arm lock (41).
Preferably, right drive mechanism includes right driving medium (24), right driving medium (24) one end is connected with right removal arm lock (42), right driving medium (24) other end is connected with right removal rack (22), right driving medium (24) middle part is connected with right fixed arm lock (26) on right lever fulcrum (28), when moving rack (22) horizontal migration, will make right driving medium (24) act on right removal arm lock (42).
Preferably, left side removes rack (21) with right side removes rack (22) and all meshes with gear (33), gear (33) are fixed on rotating piece (3), it quilt to rotate piece (3) during motor (1) effect forward rotation, left side removes rack (21) with right side removes rack (22) reverse movement and realizes that left side removes arm lock (41) and right side removal arm lock (42) press from both sides tight gas pipeline, it is by to rotate piece (3) during motor (1) effect reverse rotation, left side removes rack (21) with right side removes rack (22) and removes arm lock (41) and right side removal arm lock (42) release gas pipeline in opposite directions.
Preferably, hot melt adhesive plugging device includes curved shutoff piece (31), shutoff piece (31) with rotate piece (3) threaded connection, motor (1) orders about left side and removes arm lock (41) and right side and remove when arm lock (42) press from both sides tight gas pipeline, shutoff piece (31) quilt motor (1) orders about to move down the laminating in gas pipeline gap department, shutoff piece (31) top is equipped with first entry (35) of hot melt adhesive, the first export that shutoff piece (31) below was equipped with the hot melt adhesive is with the hot melt adhesive output adhesion the shutoff piece (31) is outside with gas pipeline, and first export is located shutoff piece (31) peripheral department, the first adhesion of hot melt adhesive of export output shutoff piece (31) periphery adhesion again shutoff piece (31) intermediate part, be located gas pipeline intermediate part gap department top.
Preferably, an air bag (32) is further connected below the blocking piece (31), the air bag (32) can enter the inside of the gas pipeline through a gap of the gas pipeline, and when gas is input into the air bag (32) through a second inlet (36), the air bag (32) is expanded to enable the blocking piece (31) to be tightly attached to the gas pipeline from the inside of the gas pipeline.
Preferably, the second inlet (36) can input hot melt adhesive after releasing gas to adhere the middle part of the plugging sheet (31) and the gap of the gas pipeline and adhere the inside of the gap of the gas pipeline, and the material of the hot melt adhesive is the same as or is fused with that of the air bag.
A control method of an automatic clamping and plugging device for a gas pipeline comprises the following steps:
step 2, starting a motor (1), wherein the motor (1) simultaneously drives a left transmission mechanism and a right transmission mechanism to respectively act on a left movable clamping arm (41) and a right movable clamping arm (42) to clamp the gas pipeline, and meanwhile, the plugging sheet (31) is driven by the motor (1) to move downwards to be attached to a gap of the gas pipeline, and then the motor (1) stops working;
step 4, injecting hot melt adhesive from a first inlet (35), wherein the hot melt adhesive output from a first outlet is firstly adhered to the periphery of the plugging sheet (31) and then adhered to the middle part of the plugging sheet (31), and the middle part is positioned above the gap of the gas pipeline; the time for the hot melt adhesive to flow from the periphery of the plugging sheet (31) to the middle part of the plugging sheet (31) is A;
step 5, after the time a that hot melt adhesive is input from the first inlet (35), starting the motor (1) again to enable the plugging sheet (31) to move downwards and be completely separated from the rotating piece (3), and then stopping the motor (1) again; meanwhile, releasing gas in the air bag, inputting hot melt adhesive into the air bag through a second inlet, melting the air bag by the hot melt adhesive, adhering the middle part of the plugging sheet (31) with the gap of the gas pipeline and adhering the inside of the gap of the gas pipeline, wherein a is less than A;
and 6, after N time, completely solidifying the hot melt adhesive, starting the motor for the third time, and when the rotating piece (3) is reversely rotated under the action of the motor (1), moving the left moving rack (21) and the right moving rack (22) in opposite directions to release the gas pipeline by the left moving clamping arm (41) and the right moving clamping arm (42).
The automatic clamping and plugging device for the gas pipeline and the control method thereof have the following beneficial effects:
(1) the invention ensures that the clamping and the plugging are integrated, greatly improves the maintenance efficiency and ensures the maintenance quality.
(2) The invention ensures that the plugging sheet moves in place while clamping, avoids the need of independently positioning the plugging sheet and saves the maintenance time.
(3) The air bag not only can play a role in helping the plugging sheet to be tightly attached to the gas pipeline, but also can input hot melt adhesive, so that the hot melt adhesive can be accurately input above and in the gap of the gas pipeline, and the maintenance quality is ensured.
Drawings
FIG. 1: the invention relates to a three-dimensional structure schematic diagram of an automatic clamping and plugging device for a gas pipeline;
FIG. 2: the invention discloses a transmission schematic diagram of an automatic clamping mechanism of a gas pipeline;
FIG. 3: the appearance schematic diagram of the automatic clamping mechanism of the gas pipeline is shown in the invention;
FIG. 4: the invention discloses a schematic diagram of the matching of a left moving rack and a right moving rack with a gear.
Description of reference numerals:
1, a motor; 11-motor switch; 21-left moving rack; 22-right moving rack; 23-left drive member; 24-a right drive member; 25-left fixed clamp arm; 26-right fixed clamping arm; 27-left lever fulcrum; 28-right lever fulcrum; 3-a rotating member; 31-a blocking sheet; 32-air bag; 33-a gear; 34-a thread; 35 — a first inlet; 36 — a second inlet; 41-moving the clamping arm leftwards; 42-moving the clamping arm to the right; 43-left resilient clamp member; 44-right resilient clamp member; 45-left turn shaft; 46-right rotating shaft.
Detailed Description
The invention is further illustrated below with reference to fig. 1 to 4:
as shown in fig. 1, an automatic clamping and plugging device for a gas pipeline comprises an automatic clamping device and a hot melt adhesive plugging device, wherein the automatic clamping device is used for fixing the hot melt adhesive plugging device and the gas pipeline; the hot melt adhesive plugging device is used for plugging the inside and the outside of the gas pipeline by hot melt adhesive respectively.
The automatic clamping device comprises a left fixed clamping arm 25, a right fixed clamping arm 26, a left movable clamping arm 41 and a right movable clamping arm 42, the left fixed clamping arm 25 is hinged to the left movable clamping arm 41 through a left rotating shaft 45, the right fixed clamping arm 26 is hinged to the right movable clamping arm 42 through a right rotating shaft 46, and the motor 1 acts on a transmission mechanism to enable the left movable clamping arm 41 and the right movable clamping arm 42 to clamp a gas pipeline.
The transmission mechanism comprises a left transmission mechanism and a right transmission mechanism, and the motor 1 drives the left transmission mechanism and the right transmission mechanism to act on the left movable clamping arm 41 and the right movable clamping arm 42 respectively. The left transmission mechanism comprises a left transmission piece 23, one end of the left transmission piece 23 is connected with the left movable clamping arm 41, the other end of the left transmission piece 23 is connected with the left movable rack 21, the middle part of the left transmission piece 23 is connected with a left lever fulcrum 27 on the left fixed clamping arm 25, and when the left movable rack 21 moves horizontally, the left transmission piece 23 can act on the left movable clamping arm 41. The right transmission mechanism comprises a right transmission piece 24, one end of the right transmission piece 24 is connected with the right movable clamping arm 42, the other end of the right transmission piece 24 is connected with the right movable rack 22, the middle part of the right transmission piece 24 is connected with the right lever fulcrum 28 on the right fixed clamping arm 26, and when the right movable rack 22 moves horizontally, the right transmission piece 24 can act on the right movable clamping arm 42.
As shown in fig. 2 and 4, the left moving rack 21 and the right moving rack 22 are both engaged with the gear 33, the gear 33 is fixed on the rotating member 3, when the rotating member 3 is acted by the motor 1 to rotate in the forward direction, the left moving rack 21 and the right moving rack 22 move in the reverse direction to realize that the left moving clamping arm 41 and the right moving clamping arm 42 clamp the gas pipeline, and when the rotating member 3 is acted by the motor 1 to rotate in the reverse direction, the left moving rack 21 and the right moving rack 22 move in the opposite direction to realize that the left moving clamping arm 41 and the right moving clamping arm 42 release the gas pipeline.
Hot melt adhesive plugging device includes curved shutoff piece 31, shutoff piece 31 with rotate 3 threaded connection, motor 1 orders about left branch and removes arm lock 41 and right branch and removes when moving arm lock 42 and press from both sides tight gas pipeline, shutoff piece 31 orders about the laminating of downstream in gas pipeline gap department by motor 1, shutoff piece 31 top is equipped with the first entry 35 of hot melt adhesive, shutoff piece 31 below is equipped with the first export of hot melt adhesive and exports hot melt adhesive adhesion shutoff piece 31 outside with gas pipeline, first export is located shutoff piece 31 peripheral department, the hot melt adhesive of first export output adhesion shutoff piece 31 periphery adhesion shutoff piece 31 intermediate part again, the intermediate part is located gas pipeline gap department top.
As shown in fig. 3, an air bag 32 is further connected below the blocking piece 31, the air bag 32 can enter the gas pipeline through a gap of the gas pipeline, and when gas is input into the air bag 32 through the second inlet 36, the air bag 32 expands to tightly attach the blocking piece 31 to the gas pipeline from the inside of the gas pipeline.
The second inlet 36 can also input hot melt adhesive after releasing the gas to adhere the middle part of the plugging sheet 31 to the gap of the gas pipeline and adhere the inside of the gap of the gas pipeline, and the material of the hot melt adhesive is the same as or is fused with that of the air bag.
The control method or principle of the automatic clamping and plugging device for the gas pipeline comprises the following steps:
step 2, starting the motor 1, wherein the motor 1 simultaneously drives the left transmission mechanism and the right transmission mechanism to respectively act on the left movable clamping arm 41 and the right movable clamping arm 42 to clamp the gas pipeline, and meanwhile, the plugging sheet 31 is driven by the motor 1 to move downwards to be attached to a gap of the gas pipeline, and then the motor 1 stops working;
step 4, injecting hot melt adhesive from the first inlet 35, wherein the hot melt adhesive output from the first outlet is firstly adhered to the periphery of the plugging sheet 31 and then adhered to the middle part of the plugging sheet 31, and the middle part is positioned above the gap of the gas pipeline; the time for the hot melt adhesive to flow from the periphery of the plugging sheet 31 to the middle part of the plugging sheet 31 is A;
step 5, after the time a that the hot melt adhesive is input from the first inlet 35, the motor 1 is started again, so that the plugging sheet 31 moves downwards to be completely separated from the rotating piece 3, and then the motor 1 is stopped again; simultaneously, releasing the gas in the air bag, inputting hot melt adhesive into the air bag through a second inlet, melting the air bag by the hot melt adhesive, and adhering the middle part of the plugging sheet 31 and the gap of the gas pipeline and the inside of the gap of the gas pipeline, wherein a is less than A;
and 6, after N time, completely solidifying the hot melt adhesive, starting the motor for the third time, and enabling the left moving rack 21 and the right moving rack 22 to move oppositely to release the gas pipeline by the left moving clamping arm 41 and the right moving clamping arm 42 when the rotating piece 3 is acted by the motor 1 to rotate reversely.
The invention is described above with reference to the accompanying drawings, it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (10)
1. The utility model provides a gas pipeline self-holding and plugging device which characterized in that: the hot melt adhesive sealing device comprises an automatic clamping device and a hot melt adhesive sealing device, wherein the automatic clamping device is used for fixing the hot melt adhesive sealing device and a gas pipeline; and the hot melt adhesive plugging device is used for plugging the inside and the outside of the gas pipeline by using hot melt adhesive respectively.
2. The gas pipeline automatic clamping and plugging device of claim 1, wherein: automatic clamping device removes arm lock (42) including left fixed arm lock (25), right fixed arm lock (26), left side, and left side removes arm lock (41) and right side, and left fixed arm lock (25) are articulated with left side removal arm lock (41) through left pivot (45), and right fixed arm lock (26) are articulated with right side removal arm lock (42) through right pivot (46), and motor (1) effect drive mechanism makes left side remove arm lock (41) and right side removal arm lock (42) press from both sides tight gas pipeline.
3. The gas pipeline automatic clamping and plugging device of claim 2, wherein: drive mechanism includes left drive mechanism and right drive mechanism, motor (1) drives left drive mechanism and right drive mechanism simultaneously and acts on left removal arm lock (41) and right removal arm lock (42) respectively, is equipped with left elastic clamping piece (43) on removing arm lock (41) on a left side, is equipped with right elastic clamping piece (44) on removing arm lock (42) on the right side.
4. The gas pipeline automatic clamping and plugging device of claim 2, wherein: left side drive mechanism includes left driving medium (23), left side driving medium (23) one end is connected with left removal arm lock (41), left side driving medium (23) other end is connected with left removal rack (21), left side driving medium (23) middle part is connected with left lever fulcrum (27) on the fixed arm lock (25) of a left side, when removing rack (21) horizontal migration on a left side, will make left driving medium (23) effect left side removal arm lock (41).
5. The gas pipeline automatic clamping and plugging device of claim 2, wherein: right side drive mechanism includes right driving medium (24), right side driving medium (24) one end is connected with right removal arm lock (42), right side driving medium (24) other end is connected with right removal rack (22), right side driving medium (24) middle part is connected with right lever pivot (28) on the fixed arm lock (26) in the right side, when moving rack (22) horizontal migration in the right side, will make right driving medium (24) act on right side and remove arm lock (42).
6. The gas pipeline automatic clamping and plugging device of claim 2, wherein: remove rack (21) on a left side with right side removes rack (22) and all meshes with gear (33), gear (33) are fixed on rotating piece (3), rotate piece (3) quilt when motor (1) effect forward rotation, remove rack (21) on a left side with right side removes rack (22) reverse movement and realizes that left side removes arm lock (41) and right side removal arm lock (42) press from both sides tight gas pipeline, rotate piece (3) quilt during motor (1) effect reverse rotation, remove rack (21) on a left side with right side removes rack (22) and removes in opposite directions and realizes that left side removes arm lock (41) and right side removal arm lock (42) release gas pipeline.
7. The gas pipeline automatic clamping and plugging device of claim 2, wherein: hot melt adhesive plugging device includes curved shutoff piece (31), shutoff piece (31) with rotate piece (3) threaded connection, motor (1) orders about left side and removes arm lock (41) and right side and remove when arm lock (42) press from both sides tight gas pipeline, shutoff piece (31) quilt motor (1) orders about to remove the laminating downwards in gas pipeline gap department, shutoff piece (31) top is equipped with first entry (35) of hot melt adhesive, shutoff piece (31) below is equipped with the first export of hot melt adhesive and exports the adhesion with the hot melt adhesive shutoff piece (31) and gas pipeline outside, first export is located shutoff piece (31) peripheral department, the first hot melt adhesive of export output adhesion earlier shutoff piece (31) peripheral adhesion again shutoff piece (31) intermediate part, the intermediate part is located gas pipeline gap department top.
8. The gas pipeline automatic clamping and plugging device of claim 2, wherein: the shutoff piece (31) below still is connected with gasbag (32), inside gasbag (32) can get into gas pipeline through gas pipeline gap department, when entering gas to gasbag (32) through second entry (36), gasbag (32) inflation will from gas pipeline inside shutoff piece (31) and the gas pipeline closely laminate.
9. The gas pipeline automatic clamping and plugging device of claim 2, wherein: the hot melt adhesive can also be input after the second entry (36) is released with gas and will the intermediate part and the gas pipeline gap department of shutoff piece (31) carry out the adhesion and with the inside adhesion that carries out in gas pipeline gap, the material of hot melt adhesive is the same or fuses with the material of gasbag.
10. A control method of an automatic clamping and plugging device for a gas pipeline comprises the following steps:
step 1, sleeving an automatic clamping device on a gas pipeline, and enabling an air bag (32) to enter the gas pipeline through a gap of the gas pipeline;
step 2, starting a motor (1), wherein the motor (1) simultaneously drives a left transmission mechanism and a right transmission mechanism to respectively act on a left movable clamping arm (41) and a right movable clamping arm (42) to clamp the gas pipeline, and meanwhile, the plugging sheet (31) is driven by the motor (1) to move downwards to be attached to a gap of the gas pipeline, and then the motor (1) stops working;
step 3, inflating the air bag (32), and tightly attaching the gas pipeline to the plugging sheet (31) from the inside of the gas pipeline;
step 4, injecting hot melt adhesive from a first inlet (35), wherein the hot melt adhesive output from a first outlet is firstly adhered to the periphery of the plugging sheet (31) and then adhered to the middle part of the plugging sheet (31), and the middle part is positioned above the gap of the gas pipeline; the time for the hot melt adhesive to flow from the periphery of the plugging sheet (31) to the middle part of the plugging sheet (31) is A;
step 5, after the time a that hot melt adhesive is input from the first inlet (35), starting the motor (1) again to enable the plugging sheet (31) to move downwards and be completely separated from the rotating piece (3), and then stopping the motor (1) again; meanwhile, releasing gas in the air bag, inputting hot melt adhesive into the air bag through a second inlet, melting the air bag by the hot melt adhesive, adhering the middle part of the plugging sheet (31) with the gap of the gas pipeline and adhering the inside of the gap of the gas pipeline, wherein a is less than A;
and 6, after N time, completely solidifying the hot melt adhesive, starting the motor for the third time, and when the rotating piece (3) is reversely rotated under the action of the motor (1), moving the left moving rack (21) and the right moving rack (22) in opposite directions to release the gas pipeline by the left moving clamping arm (41) and the right moving clamping arm (42).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782148.5A CN113389968A (en) | 2021-07-12 | 2021-07-12 | Automatic clamping and plugging device for gas pipeline and control method thereof |
| PCT/CN2021/124488 WO2022262157A1 (en) | 2021-06-14 | 2021-10-18 | Automatic clamping and plugging device for fuel gas pipeline, fastening device, and environmentally-friendly flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782148.5A CN113389968A (en) | 2021-07-12 | 2021-07-12 | Automatic clamping and plugging device for gas pipeline and control method thereof |
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| Publication Number | Publication Date |
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| CN113389968A true CN113389968A (en) | 2021-09-14 |
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| CN202110782148.5A Withdrawn CN113389968A (en) | 2021-06-14 | 2021-07-12 | Automatic clamping and plugging device for gas pipeline and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113885149A (en) * | 2021-10-19 | 2022-01-04 | 山东里能鲁西矿业有限公司 | Mining optical cable protective sheath patching device |
| CN114857401A (en) * | 2022-04-02 | 2022-08-05 | 温州市永良机械技术研究所 | High-efficient plugging device based on gas pipeline is salvageed |
| WO2022262157A1 (en) * | 2021-06-14 | 2022-12-22 | 胡德创 | Automatic clamping and plugging device for fuel gas pipeline, fastening device, and environmentally-friendly flue |
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| CN112483763A (en) * | 2020-11-19 | 2021-03-12 | 中国石油天然气集团有限公司 | Leaking stoppage method for corrosion leakage pipeline |
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| WO2022262157A1 (en) * | 2021-06-14 | 2022-12-22 | 胡德创 | Automatic clamping and plugging device for fuel gas pipeline, fastening device, and environmentally-friendly flue |
| CN113885149A (en) * | 2021-10-19 | 2022-01-04 | 山东里能鲁西矿业有限公司 | Mining optical cable protective sheath patching device |
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| CN114857401A (en) * | 2022-04-02 | 2022-08-05 | 温州市永良机械技术研究所 | High-efficient plugging device based on gas pipeline is salvageed |
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