CN115325318A - Plugging device and method for underwater natural gas pipeline leakage - Google Patents
Plugging device and method for underwater natural gas pipeline leakage Download PDFInfo
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- CN115325318A CN115325318A CN202210922307.1A CN202210922307A CN115325318A CN 115325318 A CN115325318 A CN 115325318A CN 202210922307 A CN202210922307 A CN 202210922307A CN 115325318 A CN115325318 A CN 115325318A
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- sleeve
- plugging
- pipeline
- sealing
- sealing gasket
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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
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
- F16L55/1705—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose with a substantially radial tightening member
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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
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
- F16L55/172—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose the ring, band or sleeve being tightened by a tangentially arranged threaded pin and a nut
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a plugging device for leakage of an underwater natural gas pipeline, which comprises a plugging sleeve, wherein a second sealing gasket is fixed on one side of the plugging sleeve, which is close to the pipeline, and a sealing cavity is arranged in the plugging sleeve; the pipeline sealing device comprises a sealing sleeve, a sealing cavity, a fixing cavity, a third sealing gasket, a plurality of groups of through holes, a plurality of groups of pressing components and moving components, wherein the sealing cavity is formed in the middle of the sealing sleeve, two groups of fixing rings are fixed on two sides of the inner portion of the sealing cavity, the fixing cavity is formed in one side, close to a pipeline, of each fixing ring, the third sealing gasket is arranged in the fixing cavity, the through holes are communicated with the fixing cavity in an equidistant mode, the pressing components are connected in the through holes in a sliding mode, and the moving components are arranged on two sides of the air bag.
Description
Technical Field
The invention relates to the technical field of natural gas transportation, in particular to a plugging device and a method for leakage of an underwater natural gas pipeline.
Background
The natural gas pipeline is a pipeline for conveying natural gas from a mining place or a processing plant to an urban gas distribution center or industrial enterprise user, and is also called a gas transmission pipeline, so that for an offshore gas field, the efficiency of conveying the collected natural gas through an undersea conveying pipeline is higher.
When the natural gas pipeline is used for transporting natural gas, underwater organisms (such as shell organisms) easily damage the surface of the pipeline, the surface of the pipeline is damaged, and the natural gas inside the pipeline leaks, and the natural gas leaks to cause certain seawater pollution risk, so that the pipeline is required to be plugged at the damaged position by using a plugging device.
The existing plugging method for natural gas pipeline leakage generally fixes a fixed sleeve on the surface of a damaged pipeline, and utilizes a sealing ring on the fixed sleeve to realize sealing between the pipeline and the fixed sleeve, so that leaked natural gas can enter a cavity between the fixed sleeve and the pipeline and cannot leak out, thereby realizing plugging of the damaged part of the pipeline.
Disclosure of Invention
The invention aims to provide a plugging device and a plugging method for underwater natural gas pipeline leakage, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a plugging device for leakage of an underwater natural gas pipeline comprises a plugging sleeve, wherein a second sealing gasket for playing a sealing effect is fixed on one side, close to the pipeline, of the plugging sleeve, and a sealing cavity for storing gas is formed in the plugging sleeve;
the middle part of the plugging sleeve is fixedly provided with an air bag which is communicated with a sealing cavity, two groups of fixing rings are fixed on two sides of the interior of the sealing cavity, one side of each fixing ring, which is close to the pipeline, is provided with a fixing cavity, a third sealing gasket for playing a sealing effect is arranged in the fixing cavity, a plurality of groups of through holes are equidistantly arranged on the surfaces of two sides of the plugging sleeve, the through holes are communicated with the fixing cavity, the interiors of the through holes are respectively and slidably connected with a pressing component for pressing the third sealing gasket, and two sides of the air bag are provided with moving components for driving the pressing components to move;
both sides of the plugging sleeve are fixed with side plates, and one side of each side plate, which is close to the pipeline, is provided with a reinforcing assembly for increasing the stabilizing effect of the plugging sleeve.
As a further scheme of the invention: the pressing component comprises a sliding connecting piece and a connecting rod arranged inside the through hole, a pressing block used for pressing the third sealing gasket is fixed at the bottom end of the connecting rod, the pressing block is located inside the fixed cavity, and the top end of the connecting rod is connected with the moving component.
As a further scheme of the invention: the movable assembly comprises a plurality of groups of vertical plates fixed on two sides of the surface of the plugging sleeve, the positions of the vertical plates correspond to the positions of the through holes, a sliding groove is formed in the middle of the fixing ring, sliding rods are connected inside the sliding groove in a sliding mode, a plurality of groups of top plates are arranged on the outer side of the air bag at equal intervals, and two ends of each top plate are fixedly connected with the corresponding sliding rods;
a first rack is fixed at one end of the sliding rod, which is far away from the top plate, a gear meshed with the first rack is arranged on one side of the first rack, which is far away from the vertical plate, a second gear meshed with the gear is arranged on one side of the gear, which is far away from the first rack, and the bottom end of the second gear is fixedly connected with the top end of the connecting rod;
the both sides of gear all rotate and are connected with the fixing base that is used for installing the gear, fixing base and shutoff cover fixed connection.
As a further scheme of the invention: the inside in fixed chamber is equipped with the multiunit spring, the multiunit the spring is located the sealed both sides that fill up of third respectively, just the both sides of spring fill up with the third respectively, solid fixed ring fixed connection.
As a further scheme of the invention: the reinforcing assembly comprises a mounting hole positioned in the middle of the side plate, a screw rod matched with the mounting hole is arranged in the mounting hole, a reinforcing plate used for increasing the fixing effect of the plugging sleeve is rotatably connected to the bottom end of the screw rod, and a guide piece used for guiding the reinforcing plate is arranged between the reinforcing plate and the side plate;
one end of the screw rod, which is far away from the reinforcing plate, is fixed with a knob which is used for driving the reinforcing plate to rotate, and the surface of the knob is provided with anti-skid stripes.
As a further scheme of the invention: the guide part comprises a guide rod fixed below the side plate, and the bottom end of the guide rod is fixedly connected with the reinforcing plate.
As a further scheme of the invention: and an anti-skid pad used for increasing an anti-skid effect is fixed on one side of the reinforcing plate close to the pipeline.
As a further scheme of the invention: the plugging sleeve comprises two groups of upper mounting sleeves and lower mounting sleeves which are arranged up and down, connecting plates are fixed on two sides of each of the upper mounting sleeves and the lower mounting sleeves, and the two groups of connecting plates are connected through fasteners.
As a further scheme of the invention: go up the installation cover and be close to one side of installing the cover down and be equipped with the mounting groove, one side that the installation cover is close to down the installation cover is equipped with the first sealed pad that is used for increasing sealed effect, the inside that first sealed pad is located the mounting groove, just first sealed pad size and mounting groove phase-match.
A use method of a plugging device for leakage of an underwater natural gas pipeline comprises the following steps:
s1, respectively fixing a lower mounting sleeve and an upper mounting sleeve on the surface of a pipeline, and realizing connection between the upper mounting sleeve and the lower mounting sleeve by using a fastener and a connecting plate to realize mounting of a plugging sleeve; the first sealing gasket and the second sealing gasket on the plugging sleeve are used for realizing primary sealing between the plugging sleeve and the pipeline, and the third sealing gasket is used for realizing secondary sealing between the pipeline and the plugging sleeve;
s2, after the plugging sleeve is installed, gas in the pipeline enters the sealing cavity from a damaged position, the air bag is inflated and then expands, the air bag drives the top plate to move towards one side away from the pipeline, the top plate drives the sliding rod to slide in the sliding groove, the sliding rod drives the first rack to move, the first rack drives the gear to rotate, the gear drives the second gear to move towards one side close to the pipeline when rotating, the second gear drives the connecting rod to slide in the through hole, and the connecting rod drives the pressing block to move to press the third sealing gasket;
s3, rotating the knob, wherein the knob drives the screw rod to rotate, so that the screw rod can be screwed into the mounting hole, the reinforcing plate can be driven to move under the guidance of the guide rod, the anti-skid pad on the reinforcing plate can be in contact with the surface of the pipeline, and the fixing effect of the plugging sleeve during installation is improved.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, by arranging the plugging sleeve, the second sealing gasket and the third sealing gasket, the sealing effect between the plugging sleeve and the pipeline can be increased, so that gas leaked from a broken part of the pipeline can enter the inside of the sealing cavity for storage, the gas can not be exposed, and the leaking part of the pipeline can be plugged.
According to the invention, by arranging the reinforcing assembly, the friction force between the device and the pipeline can be increased by utilizing the plurality of groups of anti-slip pads, so that the fixing effect of the plugging sleeve during installation can be increased, the situation that the damaged part on the pipeline is exposed due to the displacement of the plugging sleeve under the push of water flow or air flow is avoided, and the plugging effect of the leakage part of the pipeline can be further increased.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a schematic cross-sectional structure diagram of the plugging sleeve of the present invention.
Fig. 3 is an enlarged structural view of the portion B in fig. 2 according to the present invention.
Fig. 4 is an enlarged structural view of the portion C in fig. 3 according to the present invention.
FIG. 5 is an enlarged view of the portion A of FIG. 1 according to the present invention.
Wherein: 11. plugging the sleeve; 12. sealing the cavity; 13. an air bag; 14. a second gasket; 15. a vertical plate; 16. a chute; 17. A slide bar; 18. a top plate; 19. a first rack; 20. a gear; 21. a fixed seat; 22. a second gear; 23. connecting blocks; 24. perforating; 25. a fixing ring; 26. a fixed cavity; 27. a third seal gasket; 28. a pressing block; 29. a spring; 30. a side plate; 31. mounting holes; 32. a screw; 33. a knob; 34. a reinforcing plate; 35. a non-slip mat; 36. a guide bar; 37. mounting a sleeve; 38. a lower mounting sleeve; 39. mounting grooves; 40. a connecting plate; 41. a fastener; 42. a first seal.
Detailed Description
In one embodiment, as shown in fig. 1 to fig. 5, a plugging device for leakage of an underwater natural gas pipeline comprises a plugging sleeve 11, a second sealing gasket 14 for sealing is fixed on one side of the plugging sleeve 11 close to the pipeline, a sealing cavity 12 for storing gas is arranged inside the plugging sleeve 11, and the gas leaked from a damaged part of the pipeline can be stored by using the sealing cavity 12, so that the sealing cavity 12 can form a channel for facilitating the flow of the gas, and the gas cannot flow out of the plugging sleeve 11, thereby realizing the plugging of the leaked gas;
the middle part of the plugging sleeve 11 is fixed with an air bag 13, the air bag 13 is communicated with the sealing cavity 12, so that air in the sealing cavity 12 can conveniently enter the air bag 13, two groups of fixing rings 25 are fixed on two sides in the sealing cavity 12, one side, close to a pipeline, of each fixing ring 25 is provided with a fixing cavity 26, a third sealing gasket 27 for achieving a sealing effect is arranged in each fixing cavity 26, multiple groups of through holes 24 are equidistantly arranged on the surfaces of two sides of the plugging sleeve 11, the through holes 24 are communicated with the fixing cavities 26, abutting components for abutting against the third sealing gasket 27 are slidably connected in the through holes 24, and moving components for driving the abutting components to move are arranged on two sides of the air bag 13;
the side plates 30 are fixed on two sides of the plugging sleeve 11, the reinforcing component for increasing the stable effect of the plugging sleeve 11 is arranged on one side of each side plate 30 close to the pipeline, after the plugging sleeve 11 is installed, the stable effect of the installation of the plugging sleeve 11 can be increased by using the reinforcing component, and the situation that the damaged part on the pipeline is exposed due to the displacement of the plugging sleeve 11 under the pushing of water flow or air flow is avoided, so that the plugging effect of the leakage part of the pipeline can be further increased;
in this embodiment, after installing shutoff cover 11, utilize the sealed pad 14 of second to realize the preliminary sealing between pipeline and the shutoff cover 11, utilize the sealed pad 27 of third to realize the resealing between shutoff cover 11 and the pipeline, the inside of sealed chamber 12 is got into from the damage to the inside of pipeline, gasbag 13 takes place the inflation after being inflated this moment, gasbag 13 drives the removal subassembly after the inflation and removes to the one side of keeping away from the pipeline, it drives and supports pressure subassembly reverse movement to remove the subassembly, make and support the pressure subassembly and can support the pressure to the sealed pad 27 of third, realize compressing tightly, make the sealed pad 27 of third take place to warp closely laminate with the surface of pipeline under the effect that receives the pressure, sealed effect can further be strengthened.
In one embodiment, as shown in fig. 1 to 5, the pressing component includes a connecting rod 23 slidably connected inside the through hole 24, a pressing block 28 for pressing the third sealing gasket 27 is fixed at the bottom end of the connecting rod 23, the pressing block 28 is located inside the fixing cavity 26, and the top end of the connecting rod 23 is connected to the moving component;
in this embodiment, the moving component can drive the connecting rod 23 to slide inside the through hole 24 when moving, and the connecting rod 23 drives the pressing block 28 to move, so as to press the third sealing pad 27.
In one embodiment, as shown in fig. 1 to 5, the moving assembly includes a plurality of sets of risers 15 fixed on two sides of the surface of the blocking sleeve 11, the positions of the risers 15 correspond to the positions of the through holes 24, a sliding groove 16 is arranged in the middle of the fixing ring 25, sliding rods 17 are slidably connected inside the sliding groove 16, a plurality of sets of top plates 18 are equidistantly arranged outside the air bag 13, and two ends of each top plate 18 are fixedly connected with the corresponding sliding rods 17;
a first rack 19 is fixed at one end of the sliding rod 17 far away from the top plate 18, a gear 20 meshed with the first rack 19 is arranged on one side of the first rack 19 far away from the vertical plate 15, a second gear 22 meshed with the gear 20 is arranged on one side of the gear 20 far away from the first rack 19, and the bottom end of the second gear 22 is fixedly connected with the top end of a connecting rod 23;
both sides of the gear 20 are rotatably connected with fixing seats 21 for mounting the gear 20, and the fixing seats 21 are fixedly connected with the plugging sleeve 11;
in this embodiment, when the airbag 13 is inflated, the airbag 13 drives the top plate 18 to move to a side away from the pipeline, the top plate 18 drives the sliding rod 17 to slide inside the sliding slot 16, the sliding rod 17 drives the first rack 19 to move, the first rack 19 drives the gear 20 to rotate, the gear 20 drives the second gear 22 to move to a side close to the pipeline when rotating, and the second gear 22 drives the connecting rod 23 to slide inside the through hole 24.
In one embodiment, as shown in fig. 1 to 5, a plurality of sets of springs 29 are disposed inside the fixing cavity 26, the plurality of sets of springs 29 are respectively located at two sides of the third sealing gasket 27, and two sides of the springs 29 are respectively fixedly connected with the third sealing gasket 27 and the fixing ring 25;
in this embodiment, the spring 29 can be used to press the third sealing gasket 27, so that the third sealing gasket 27 can contact with the surface of the pipeline, and when the airbag 13 is not inflated, the third sealing gasket 27 can still contact with the surface of the blocking sleeve 11, thereby achieving the sealing effect.
In one embodiment, as shown in fig. 1 to 5, the reinforcing assembly includes a mounting hole 31 located in the middle of the side plate 30, a screw 32 is provided inside the mounting hole 31 and is engaged with the mounting hole 31, a reinforcing plate 34 for increasing the fixing effect of the plugging sleeve 11 is rotatably connected to the bottom end of the screw 32, specifically, the reinforcing plate 34 is arc-shaped and is engaged with the surface of the pipe strip, so that the reinforcing plate 34 can better fit with the pipe, the contact area between the reinforcing plate 34 and the pipe can be increased relative to the planar reinforcing plate 34, so as to increase the anti-slip fixing effect, and a guide member for guiding the reinforcing plate 34 is provided between the reinforcing plate 34 and the side plate 30;
a knob 33 for driving the reinforcing plate 34 to rotate is fixed at one end of the screw rod 32, which is far away from the reinforcing plate 34, and anti-skid stripes are arranged on the surface of the knob 33;
in this embodiment, by rotating the rotation knob 33, the knob 33 drives the screw rod 32 to rotate, so that the screw rod 32 can be screwed into the mounting hole 31, and the reinforcing plate 34 can be driven to move under the guidance of the guide rod 36, so that the anti-skid pad 35 on the reinforcing plate 34 can contact with the surface of the pipeline, and the fixing effect of the plugging sleeve 11 during installation is increased.
In one embodiment, as shown in fig. 1-5, the guiding element includes a guiding rod 36 fixed below the side plate 30, the bottom end of the guiding rod 36 is fixedly connected to the reinforcing plate 34, and in particular, the guiding rod 36 may be a telescopic rod in the prior art;
in this embodiment, the guide rod 36 can guide the reinforcing plate 34 when the reinforcing plate 34 moves, so as to increase the stability of the reinforcing plate 34 when moving.
In one embodiment, as shown in fig. 1-5, a non-slip mat 35 for increasing the non-slip effect is fixed on one side of the reinforcing plate 34 close to the pipeline, and the non-slip mat 35 may be made of a rubber material in the prior art;
in the present embodiment, the anti-slip effect between the reinforcing plate 34 and the pipe can be further increased by the anti-slip pad 35, so that the fixing effect can be further increased.
In one embodiment, as shown in fig. 1 to 5, the plugging sleeve 11 includes two sets of upper and lower mounting sleeves 37, 38 arranged up and down, connecting plates 40 are fixed on both sides of the upper and lower mounting sleeves 37, 38, and the two sets of connecting plates 40 are connected by a fastener 41;
in the present embodiment, the fastening member 41 can be used to realize the connection and fixation between the two sets of connecting plates 40, so as to realize the connection between the upper mounting sleeve 37 and the lower mounting sleeve 38, and realize the installation and fixation of the whole plugging sleeve 11.
In one embodiment, as shown in fig. 1 to 5, a mounting groove 39 is formed on one side of the upper mounting sleeve 37 close to the lower mounting sleeve 38, a first sealing gasket 42 for increasing the sealing effect is arranged on one side of the lower mounting sleeve 38 close to the upper mounting sleeve 37, the first sealing gasket 42 is located inside the mounting groove 39, and the size of the first sealing gasket 42 is matched with that of the mounting groove 39;
in this embodiment, the first sealing gasket 42 can increase the sealing effect between the upper mounting sleeve 37 and the lower mounting sleeve 38, so as to further increase the sealing effect between the plugging device and the pipeline.
A use method of a plugging device for leakage of an underwater natural gas pipeline comprises the following steps:
s1, respectively fixing a lower mounting sleeve 38 and an upper mounting sleeve 37 on the surface of a pipeline, and realizing the connection between the upper mounting sleeve 37 and the lower mounting sleeve 38 by using a fastener 41 and a connecting plate 40, so as to realize the mounting of a plugging sleeve 11; the primary sealing between the plugging sleeve 11 and the pipeline is realized by using the second sealing gasket 14 and the first sealing gasket 42 on the plugging sleeve 11, and the secondary sealing between the pipeline and the plugging sleeve 11 is realized by using the third sealing gasket 27;
s2, after the plugging sleeve 11 is installed, gas in the pipeline enters the sealing cavity 12 from a damaged position, at the moment, the air bag 13 is inflated and expands, the air bag 13 drives the top plate 18 to move towards one side far away from the pipeline, the top plate 18 drives the sliding rod 17 to slide in the sliding groove 16, the sliding rod 17 drives the first rack 19 to move, the first rack 19 drives the gear 20 to rotate, the gear 20 drives the second gear 22 to move towards one side close to the pipeline when rotating, the second gear 22 drives the connecting rod 23 to slide in the through hole 24, and the connecting rod 23 drives the pressing block 28 to move to press the third sealing gasket 27;
s3, the knob 33 is rotated, the knob 33 drives the screw rod 32 to rotate, so that the screw rod 32 can be screwed into the mounting hole 31, the reinforcing plate 34 can be driven to move under the guidance of the guide rod 36, the anti-skid pad 35 on the reinforcing plate 34 can be in contact with the surface of the pipeline, and the fixing effect of the plugging sleeve 11 during installation is improved.
It should be noted here that after the damaged portion of the pipeline is plugged, the pipeline of the broken portion is replaced by using a pipeline press-belt plugging manner, so that the situation that the damaged portion of the pipeline is gradually enlarged due to a large stress caused by leaking gas, and the gas leakage speed is increased is avoided;
the pipeline press belt plugging technology is a special technology for maintaining and repairing a safe, economic, rapid and efficient in-service pipeline. The device can complete the operations of replacing the pipeline, displacing, replacing the valve and adding branch lines under the condition of uninterrupted pipeline medium delivery, and can also quickly and safely repair an accident pipeline when the pipeline leaks to recover the operation of the pipeline;
the pipeline pinch plugging technology is the prior art and is not specifically described here.
The embodiment discloses a plugging device and a method for underwater natural gas pipeline leakage, when a crushed position of a pipeline needs to be plugged, firstly, an upper mounting sleeve 37 and a lower mounting sleeve 38 are respectively sleeved on the pipeline, a fastener 41 and a connecting plate 40 are utilized to realize the connection and fixation between the lower mounting sleeve 38 and the upper mounting sleeve 37, so as to realize the mounting and fixation of a plugging sleeve 11, at the moment, the primary sealing between the plugging sleeve 11 and the pipeline can be realized by utilizing a second sealing gasket 14 and a first sealing gasket 42 on the plugging sleeve 11, a third sealing gasket 27 can be driven to be attached to the pipeline under the action of a spring 29, the secondary sealing between the pipeline and the plugging sleeve 11 is realized by utilizing the third sealing gasket 27, after the plugging sleeve 11 is mounted, gas in the pipeline enters the sealing cavity 12 from the damaged position, at the moment, an airbag 13 expands after being inflated, the airbag 13 drives a top plate 18 to move to one side far away from the pipeline, the top plate 18 drives the sliding rod 17 to slide in the sliding groove 16, the sliding rod 17 drives the first rack 19 to move, the first rack 19 drives the gear 20 to rotate, the gear 20 drives the second gear 22 to move towards one side close to the pipeline when rotating, the second gear 22 drives the connecting rod 23 to slide in the through hole 24, the connecting rod 23 drives the abutting block 28 to move, the third sealing gasket 27 is pressed tightly, the third sealing gasket 27 deforms under the action of pressure and is tightly attached to the surface of the pipeline, the sealing effect can be further enhanced, the plugging effect is better, the knob 33 is rotated, the knob 33 drives the screw rod 32 to rotate, the screw rod 32 can be screwed into the mounting hole 31, the reinforcing plate 34 can be driven to move under the guide of the guide rod 36, the anti-skid pad 35 on the reinforcing plate 34 can be in contact with the surface of the pipeline, and the fixing effect of the plugging sleeve 11 when being mounted is increased, the situation that the damaged part on the pipeline is exposed due to the fact that the plugging sleeve 11 is displaced under the pushing of water flow or air flow is avoided.
Claims (10)
1. A plugging device for leakage of an underwater natural gas pipeline comprises a plugging sleeve (11), wherein a second sealing gasket (14) for playing a sealing effect is fixed on one side, close to the pipeline, of the plugging sleeve (11), and a sealing cavity (12) for storing gas is arranged inside the plugging sleeve (11);
the novel plugging device is characterized in that an air bag (13) is fixed in the middle of the plugging sleeve (11), the air bag (13) is communicated with a sealing cavity (12), two groups of fixing rings (25) are fixed on two sides of the inside of the sealing cavity (12), one side, close to a pipeline, of each fixing ring (25) is provided with a fixing cavity (26), a third sealing gasket (27) used for achieving a sealing effect is arranged inside each fixing cavity (26), multiple groups of through holes (24) are equidistantly formed in the surfaces of two sides of the plugging sleeve (11), the through holes (24) are communicated with the fixing cavities (26), abutting components used for abutting against the third sealing gasket (27) are connected inside each through the through holes (24) in a sliding mode, and moving components used for driving the abutting components to move are arranged on two sides of the air bag (13);
both sides of shutoff cover (11) all are fixed with curb plate (30), curb plate (30) are equipped with the reinforcement assembly who is used for increasing shutoff cover (11) stable effect near one side of pipeline.
2. The plugging device for underwater natural gas pipeline leakage according to claim 1, wherein the pressing component comprises a connecting rod (23) slidably connected inside the through hole (24), a pressing block (28) for pressing a third sealing gasket (27) is fixed at the bottom end of the connecting rod (23), the pressing block (28) is located inside the fixed cavity (26), and the top end of the connecting rod (23) is connected with the moving component.
3. The plugging device for underwater natural gas pipeline leakage according to claim 2, wherein the moving component comprises a plurality of sets of vertical plates (15) fixed on two sides of the surface of the plugging sleeve (11), the positions of the vertical plates (15) correspond to the positions of the through holes (24), a sliding groove (16) is arranged in the middle of the fixing ring (25), sliding rods (17) are connected inside the sliding groove (16) in a sliding manner, a plurality of sets of top plates (18) are arranged on the outer side of the air bag (13) at equal intervals, and two ends of each top plate (18) are respectively fixedly connected with the corresponding sliding rods (17);
a first rack (19) is fixed at one end, far away from the top plate (18), of the sliding rod (17), a gear (20) meshed with the first rack (19) is arranged on one side, far away from the vertical plate (15), of the first rack (19), a second gear (22) meshed with the gear (20) is arranged on one side, far away from the first rack (19), of the gear (20), and the bottom end of the second gear (22) is fixedly connected with the top end of a connecting rod (23);
the both sides of gear (20) are all rotated and are connected with fixing base (21) that are used for gear (20) to install, fixing base (21) and shutoff cover (11) fixed connection.
4. The plugging device for underwater natural gas pipeline leakage, according to claim 1, characterized in that a plurality of sets of springs (29) are arranged inside said fixing cavity (26), said plurality of sets of springs (29) are respectively located at two sides of a third sealing gasket (27), and two sides of said springs (29) are respectively fixedly connected with said third sealing gasket (27) and said fixing ring (25).
5. The plugging device for underwater natural gas pipeline leakage according to claim 1, wherein the reinforcing component comprises a mounting hole (31) located in the middle of the side plate (30), a screw rod (32) matched with the mounting hole (31) is arranged inside the mounting hole (31), a reinforcing plate (34) used for increasing the fixing effect of the plugging sleeve (11) is rotatably connected to the bottom end of the screw rod (32), and a guide member used for guiding the reinforcing plate (34) is arranged between the reinforcing plate (34) and the side plate (30);
one end of the screw rod (32) far away from the reinforcing plate (34) is fixed with a knob (33) used for driving the reinforcing plate (34) to rotate, and anti-skid stripes are arranged on the surface of the knob (33).
6. The plugging device for underwater natural gas pipeline leakage of claim 5, wherein the guiding member comprises a guiding rod (36) fixed below the side plate (30), and the bottom end of the guiding rod (36) is fixedly connected with the reinforcing plate (34).
7. The plugging device for underwater natural gas pipeline leakage of claim 5, characterized in that an anti-slip mat (35) for increasing anti-slip effect is fixed on one side of the reinforcing plate (34) close to the pipeline.
8. The plugging device for underwater natural gas pipeline leakage according to claim 5, wherein the plugging sleeve (11) comprises two sets of upper mounting sleeve (37) and lower mounting sleeve (38) which are arranged up and down, connecting plates (40) are fixed on two sides of the upper mounting sleeve (37) and the lower mounting sleeve (38), and the two sets of connecting plates (40) are connected through fasteners (41).
9. The plugging device for underwater natural gas pipeline leakage according to claim 8, wherein a mounting groove (39) is formed in one side of the upper mounting sleeve (37) close to the lower mounting sleeve (38), a first sealing gasket (42) for increasing sealing effect is arranged in one side of the lower mounting sleeve (38) close to the upper mounting sleeve (37), the first sealing gasket (42) is located inside the mounting groove (39), and the size of the first sealing gasket (42) is matched with that of the mounting groove (39).
10. Use of a plugging device for underwater natural gas pipeline leakage according to any one of claims 1 to 9, characterized in that it comprises the steps of:
s1, respectively fixing a lower mounting sleeve (38) and an upper mounting sleeve (37) on the surface of a pipeline, and realizing connection between the upper mounting sleeve (37) and the lower mounting sleeve (38) by using a fastener (41) and a connecting plate (40) to realize mounting of a plugging sleeve (11); the primary sealing between the plugging sleeve (11) and the pipeline is realized by using a second sealing gasket (14) and a first sealing gasket (42) on the plugging sleeve (11), and the secondary sealing between the pipeline and the plugging sleeve (11) is realized by using a third sealing gasket (27);
s2, after the plugging sleeve (11) is installed, gas in the pipeline enters the inside of the sealing cavity (12) from a damaged position, at the moment, the air bag (13) is inflated and then expands, the air bag (13) drives the top plate (18) to move to one side far away from the pipeline, the top plate (18) drives the sliding rod (17) to slide in the sliding groove (16), the sliding rod (17) drives the first rack (19) to move, the first rack (19) drives the gear (20) to rotate, the gear (20) drives the second gear (22) to move to one side close to the pipeline when rotating, the second gear (22) drives the connecting rod (23) to slide in the through hole (24), and the connecting rod (23) drives the pressing block (28) to move to press the third sealing gasket (27);
s3, rotating the knob (33), wherein the knob (33) drives the screw rod (32) to rotate, so that the screw rod (32) can be screwed into the mounting hole (31), and the reinforcing plate (34) can be driven to move under the guidance of the guide rod (36), so that the anti-skid pad (35) on the reinforcing plate (34) can be in contact with the surface of the pipeline, and the fixing effect of the plugging sleeve (11) during installation is improved.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307870A (en) * | 2023-11-10 | 2023-12-29 | 北京燃气昌平有限公司 | Quick shutoff system of medium-low pressure gas pipeline leakage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307870A (en) * | 2023-11-10 | 2023-12-29 | 北京燃气昌平有限公司 | Quick shutoff system of medium-low pressure gas pipeline leakage |
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