Quick plugging equipment for natural gas leakage pipeline

Abstract

The invention relates to the technical field of pipeline plugging, in particular to rapid plugging equipment for a natural gas leakage pipeline, which is characterized in that two ends of an upper cover and a lower cover are respectively connected with sealing arcs, the two oppositely arranged sealing arcs are contacted and matched to form a sealing pipe, the inner wall of the upper cover is connected with the end part of a pressure relief pipe, and the other end of the pressure relief pipe is far away from the side wall of the upper cover; a sealing assembly is arranged in the upper cover, the upper cover and the lower cover are matched in a sealing mode through a locking mechanism, and after the upper cover and the lower cover are close to each other and sealed, leaked natural gas is temporarily discharged through a pressure relief pipe, so that temporary closing of a natural gas pipeline can be avoided, and the situation that when the locking mechanism locks the upper cover and the lower cover, the locking mechanism cannot lock the upper cover and the lower cover is prevented. And the phenomena of sealing failure and plugging failure caused by unstable contact matching of the upper cover and the lower cover due to the action of the continuously leaked natural gas pressure are avoided, and meanwhile, the plugging efficiency and speed are improved.

Description

Technical Field

[0001] This invention relates to the field of pipeline sealing technology, and in particular to a rapid sealing device for leaking natural gas pipelines. Background Technology

[0002] Natural gas pipelines are closed pressure pipeline systems that transport natural gas, including long-distance pipelines and urban pipe networks. During use, natural gas pipelines may leak due to various reasons, such as corrosion causing thinning and perforation of the inner and outer walls of the pipeline due to soil, stray currents, or media corrosion; damage to the pipeline caused by external forces such as construction and drilling; original defects or aging cracks in the pipeline body, welds, or connectors; and deformation and rupture of the pipeline due to foundation settlement and geological disasters.

[0003] Existing natural gas plugging equipment requires the natural gas pipeline to be depressurized when plugging leaks. However, this necessitates temporarily stopping the delivery of natural gas, which seriously disrupts the smooth operation of production and daily life. Summary of the Invention

[0004] This invention provides a rapid sealing device for leaking natural gas pipelines to address the issues raised in the background art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a rapid sealing device for a natural gas leak pipeline, comprising: an upper cover, a lower cover, a sealing arc, a pressure relief pipe, a sealing assembly, and a locking mechanism. The upper cover and the lower cover are respectively connected to sealing arcs at both ends, and the two oppositely arranged sealing arcs contact and cooperate to form a sealing pipe. The inner wall of the upper cover is connected to the end of the pressure relief pipe, and the other end of the pressure relief pipe is located away from the side wall of the upper cover. The upper cover is equipped with a sealing assembly, and the upper cover and the lower cover are sealed and cooperated by the locking mechanism.

[0006] Preferably, the sealing assembly includes a sealing plate and a pressure relief hole. The top of the sealing plate is slidably connected to the two inner walls of the upper cover. The sealing plate has a pressure relief hole, which is connected to a pressure relief pipe. A transmission mechanism is connected to the sealing plate.

[0007] Preferably, the transmission mechanism includes a rack, a gear, and a rotating shaft. The rack is connected to the sealing plate, the rack meshes with the gear, the gear is connected to the rotating shaft, and the rotating shaft is rotatably connected to the top wall of the upper cover.

[0008] Preferably, the locking mechanism includes a locking rod, a double screw, and a sliding groove. Each side wall of the upper and lower cover is connected to the end of a mounting plate. The two mounting plates, positioned opposite each other, are in contact with each other. A sliding groove is formed on the mounting plate, and the bottom end of the locking rod is slidably connected within the groove. A V-shaped groove is formed on the bottom side wall of the locking rod. The two V-shaped grooves within one sliding groove have opposite opening directions and are in contact with the end face of the mounting plate. The locking rod is threaded onto one threaded portion of the double screw. The double screw is rotatably connected to the upper cover and is connected to the second transmission mechanism.

[0009] Preferably, the transmission mechanism two includes: a bevel gear, a second bevel gear, a second rotating shaft, a helical gear, and a second helical gear. A bevel gear is connected to the twin screw, and the bevel gear meshes with the second bevel gear. The second bevel gear is installed at the end of the second rotating shaft located outside the side wall of the upper cover. A helical gear is connected to the second rotating shaft, and the second rotating shaft is connected to the drive mechanism. The helical gear meshes perpendicularly with the second helical gear on the rotating shaft.

[0010] Preferably, the drive mechanism includes a worm gear and a worm, with the worm gear connected to the second rotating shaft, the worm gear meshing with the worm, the worm being rotatably and sealingly connected to the upper cover, and the top end of the worm being positioned above the top of the upper cover.

[0011] Preferably, the worm has a through hole running longitudinally through it, and a rotating shaft three is slidably sealed inside the through hole. The top of the rotating shaft three, located above the worm, is connected to a nut. The bottom of the nut is connected to the top of a spring, and the bottom of the spring slides into the top of the nut two. The nut two is connected to the worm. The bottom of the rotating shaft three, located below the worm, is connected to a gear three. The top of the gear three is connected to the bottom of a plug rod, and the top of the plug rod is inserted into a hole at the bottom of the worm.

[0012] Preferably, a ratchet is connected to the worm gear, the ratchet is in frictional engagement with one side of the ratchet tooth end, the other side of the ratchet tooth end is in contact engagement with the ratchet tooth, the other end of the ratchet tooth is connected to a slide rod, the slide rod is slidably connected to the upper cover, and the other end of the ratchet tooth is connected to the upper cover through a spring.

[0013] Preferably, the top wall of the cover is connected to a storage tank, a rack is provided below the gear three, the rack is connected to the end of the piston rod, the piston rod is connected to the end face of the piston, the piston rod and the storage tank are in sliding sealing fit, the other side of the piston rod and the storage tank are filled with working medium, and the end of the output pipe is connected to the inner wall of the storage tank.

[0014] Preferably, the bottom surface of the top cover and the bottom surface of the mounting plate have mounting grooves, and the inner wall of the sealing arc has multiple arc-shaped grooves arranged in a linear array. The two ends of the arc-shaped grooves are respectively connected to one side of a mounting groove. The top surface of the bottom cover and another mounting plate have a second mounting groove, and the inner wall of another sealing arc has multiple second arc-shaped grooves arranged in a linear array. An elastic sealing arc is engaged in both the first and second arc-shaped grooves. The ends of two opposing elastic sealing arcs are in contact with each other. The two inner walls of the elastic sealing arcs are respectively connected to the inner wall of the end of an elastic sealing tube. An elastic sealing tube is engaged in both the mounting groove and the second mounting groove. The other end of the output tube is connected to the inner wall of the elastic sealing arc. The output tube is placed in the through hole of the second sealing arc on the inner wall of the top cover.

[0015] The beneficial effects of this invention are as follows: In the solution of this invention: 1. After the upper and lower covers are close together and sealed, the leaked natural gas can be temporarily discharged through the pressure relief pipe. This can avoid temporarily shutting down the natural gas pipeline and prevent the sealing failure caused by the unstable contact between the upper and lower covers due to the pressure of the continuously leaking natural gas when the locking mechanism is locking the upper and lower covers. This also improves the efficiency and speed of sealing. 2. After the upper and lower covers are sealed, the sealing assembly is activated to complete the overall sealing of the device, thus achieving complete plugging of any leaks. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional view of the top cover of the present invention; Figure 3 This is a schematic diagram showing the conductive state of the pressure relief pipe and pressure relief hole of the present invention; Figure 4 This is a schematic diagram of the V-shaped slot structure of the present invention; Figure 5 This is a schematic diagram of the meshing connection between the helical gear and the helical gear of the present invention; Figure 6 This is a schematic diagram of the three sliding connections between the worm gear and the rotating shaft of the present invention; Figure 7 This is a schematic diagram showing the relative positional relationship between gear three and ratchet in this invention; Figure 8 This is a schematic diagram showing the connection relationship between the piston rod and the piston in this invention; Figure 9 This is a schematic diagram showing the location of the arc-shaped groove in this invention; Figure 10 This is a schematic diagram showing the location of the second arc-shaped groove in the present invention; Figure 11This is a schematic diagram showing the connection between the output tube and the elastic sealing arc of the present invention; Figure 12 This is a schematic diagram illustrating the insertion and connection relationship between the insertion cannula and the insertion tube of the present invention.

[0017] The components include: 1. Upper cover; 2. Lower cover; 3. Sealing arc; 4. Pressure relief pipe; 5. Sealing assembly; 6. Locking mechanism; 7. Sealing plate; 8. Pressure relief hole; 9. Rack; 10. Gear; 11. Rotating shaft; 12. Locking rod; 13. Double screw; 14. Slide groove; 15. Mounting plate; 16. V-groove; 17. Bevel gear; 18. Rotating shaft; 19. Helical gear; 20. Helical gear; 21. Worm gear; 22. Worm; 23. Rotating shaft; 24. Nut; 25. Spring. Nut 26, Gear 37, Ratchet 28, Racket tooth 29, Slide rod 30, Spring 21, Storage tank 32, Rack 2 33, Piston rod 34, Piston 35, Output pipe 36, Mounting groove 37, Arc groove 38, Mounting groove 2 39, Elastic sealing arc 40, Elastic sealing tube 41, Insert rod 42, Arc groove 2 43, Insert tube 44, Insert tube 45, Spring 3 46, Sealing plate 47, Guide hole 48, Auxiliary tube 49. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] Example 1: Reference Figures 1-12 A rapid sealing device for a natural gas leak pipeline includes: an upper cover 1, a lower cover 2, a sealing arc 3, a pressure relief pipe 4, a sealing assembly, and a locking mechanism 5. The upper cover 1 and the lower cover 2 are respectively connected to the two ends of the sealing arc 3. The two sealing arcs 3 arranged opposite to each other contact and cooperate to form a sealing pipe. The end of the pressure relief pipe 4 is connected to the inner wall of the upper cover 1. The other end of the pressure relief pipe 4 is set away from the side wall of the upper cover 1. The sealing assembly is installed inside the upper cover 1. The upper cover 1 and the lower cover 2 are sealed and cooperated by the locking mechanism 5.

[0020] The principles and beneficial effects of the above scheme are as follows: The opening at the bottom of the upper cover 1 and the opening at the top of the lower cover 2 are positioned opposite each other and make contact and seal. Two oppositely positioned sealing arcs 3 make contact and seal, and the two opposite sealing arcs 3 form a sealing tube structure. The upper cover 1 and the lower cover 2 and the sealing arcs 3 form a sealing structure. The sealing tube clamps the natural gas pipeline. At the same time, the upper cover 1 and the lower cover 2 protect the leakage point of the natural gas pipeline. When the device is in use, the leakage point can be sealed in a pressurized or unpressurized state. When the natural gas pipeline is pressurized, it is relatively close to the upper cover 1 and the lower cover 2. After the upper cover 1 and the lower cover 2 are close and sealed, the leaked natural gas is temporarily discharged through the pressure relief pipe 4. This can avoid temporarily shutting down the natural gas pipeline and prevent the locking mechanism 5 from causing the upper cover 1 and the lower cover 2 to fail due to unstable contact due to the pressure of the continuously leaking natural gas when locking the upper cover 1 and the lower cover 2. This also improves the efficiency and speed of sealing. After the upper cover 1 and the lower cover 2 have completed sealing, the sealing assembly is then activated to complete the overall sealing of the device, thus achieving complete plugging of any leaks.

[0021] Example 2: Reference Figures 1-12 The sealing assembly includes a sealing plate 6 and a pressure relief hole 7. The top of a sealing plate 6 is slidably connected to the two inner walls of the upper cover 1. The sealing plate 6 has a pressure relief hole 7, which is connected to the pressure relief pipe 4. A transmission mechanism is connected to the sealing plate 6.

[0022] The principles and beneficial effects of the above scheme are as follows: When the upper cover 1 and the lower cover 2 are not locked, the pressure relief hole 7 and the pressure relief pipe 4 are in a conductive state to release the leaked natural gas. After the upper cover 1 and the lower cover 2 are locked, the transmission mechanism drives the sealing plate 6 to move, and the pressure relief hole 7 moves synchronously. After the sliding sealing plate 6 seals the pressure relief pipe 4, the device completes a complete seal.

[0023] Example 3: Reference Figures 1-12 The transmission mechanism includes a rack 8, a gear 9, and a rotating shaft 10. The rack 8 is connected to the sealing plate 6. The rack 8 is meshed with the gear 9. The gear 9 is connected to the rotating shaft 10. The rotating shaft 10 is rotatably connected to the top wall of the upper cover 1.

[0024] The principles and beneficial effects of the above scheme are as follows: When the sealing plate 6 needs to be moved, the rotating shaft 10 rotates, and the rotating shaft 10 drives the gear 9 to rotate. Under the sliding cooperation between the inner wall of the upper cover 1 and the top of the sealing plate 6, the gear 9 and the rack 8 mesh to drive the sealing plate 6 to move, so that the sealing plate 6 can completely seal the pressure relief pipe 4 and realize the plugging of the device.

[0025] Example 4: Reference Figures 1-12The locking mechanism 5 includes a locking rod 11, a double screw 12, and a sliding groove 13. The upper cover 1 and the lower cover 2 each have an end of a mounting plate 14 connected to their respective side walls. The two mounting plates 14 are arranged opposite to each other and are in contact with each other. The mounting plate 14 has a sliding groove 13. The bottom end of the locking rod 11 is slidably connected in the sliding groove 13. The bottom side wall of the locking rod 11 has a V-shaped groove 15. The two V-shaped grooves 15 in one sliding groove 13 are arranged with opposite opening directions. The V-shaped grooves 15 are in contact with the end face of the mounting plate 14. The locking rod 11 is threadedly connected to one threaded part of the double screw 12. The double screw 12 is rotatably connected to the upper cover 1 and is connected to the transmission mechanism 2.

[0026] The principles and beneficial effects of the above scheme are as follows: As the upper cover 1 and lower cover 2 approach each other, the bottom of the locking rod 11 inserts into the groove 13 of the mounting plate 14 connected to the lower cover 2. The transmission mechanism 2 starts, driving the double screw 12 to rotate. Under the sliding engagement of the two grooves 13, the two adjacent locking rods 11 move in opposite directions, and the V-shaped locking groove 15 moves synchronously. When the V-shaped locking groove 15 moves to the end of the groove 13, the top inner wall of the V-shaped locking groove 15 contacts the top surface of the mounting plate 14 on the upper cover 1, and the bottom inner wall of the V-shaped locking groove 15... The upper cover 1 and the lower cover 2 are in contact with the bottom surface of the mounting plate 14. Since the opening ends of the adjacent V-shaped slots 15 located in the same slide groove 13 are set in opposite directions, it can be seen that during the clamping process of the two mounting plates 14 by the V-shaped slots 15, the pressure applied by the V-shaped slots 15 to the two mounting plates 14 gradually increases, thereby achieving complete locking of the upper cover 1 and the lower cover 2. At the same time, it can ensure the stability of the seal between the upper cover 1 and the lower cover 2, and further prevent the phenomenon of incomplete sealing during the locking process.

[0027] Example 5: Reference Figures 1-12 The transmission mechanism 2 includes: bevel gear 16, bevel gear 17, rotating shaft 18, helical gear 19, and helical gear 20. Bevel gear 16 is connected to the twin screw 12. Bevel gear 16 meshes with bevel gear 17. Bevel gear 17 is installed at the end of rotating shaft 18 located outside the side wall of the upper cover 1. Helical gear 19 is connected to rotating shaft 18. Rotating shaft 18 is connected to the drive mechanism. Helical gear 19 meshes perpendicularly with helical gear 20 on rotating shaft 10.

[0028] The principles and beneficial effects of the above scheme are as follows: When the twin screw 12 needs to rotate, the drive mechanism is started. The output end of the drive mechanism drives the rotating shaft 18 to rotate. The two bevel gears 17 rotate synchronously, each driving a bevel gear 16 that meshes with it to rotate. At the same time, the rotation of the second shaft 18 drives the helical gear 19 to rotate, and the helical gear 20 meshing with it to rotate, which in turn drives the shaft 10 to rotate. With this configuration, the shaft 10 and the second shaft 18 can be controlled to rotate synchronously through the drive mechanism, which reduces the complexity of the device.

[0029] Example 6: Reference Figures 1-12 The drive mechanism includes a worm gear 21 and a worm 22. The worm gear 21 is connected to the rotating shaft 18. The worm gear 21 is meshed with the worm 22. The worm 22 is rotatably sealed to the upper cover 1. The top of the worm 22 is positioned above the top of the upper cover 1.

[0030] The principles and beneficial effects of the above scheme are as follows: When the second shaft 18 needs to be rotated, the second shaft 18 drives the worm gear 21 to rotate. After the rotation of the second shaft 18 ends, the worm gear 21 and the worm 22 are locked. Therefore, there will be no loosening between the V-groove 15 and the mounting plate 14, and the sealing plate 6 will not be unable to seal the pressure relief pipe 4, thus improving the stability of the device when locked.

[0031] Example 7: Reference Figures 1-12 The worm gear 22 has a through hole running longitudinally through it. A rotating shaft 23 is slidably sealed inside the through hole. A nut 24 is connected to the top of the rotating shaft 23 above the worm gear 22. The top of a spring 25 is connected to the bottom of the nut 24. The bottom of the spring 25 is slidably engaged with the top of a nut 26. The nut 26 is connected to the worm gear 22. A gear 27 is connected to the bottom of the rotating shaft 23 below the worm gear 22. The bottom of a plug rod 42 is connected to the top of the gear 27. The top of the plug rod 42 is inserted into a hole at the bottom of the worm gear 22.

[0032] The principles and beneficial effects of the above scheme are as follows: The worm gear 22 is located on the top side wall above the top surface of the upper cover 1 and is connected to a nut 26, which allows the operator to turn the worm gear 22 with a wrench when locking the device.

[0033] When rotating the worm 22, a wrench can also be used to rotate the nut 24 connected to the top surface of the worm 22 by the shaft 3 23, or when the wrench is large, the wrench can be used to rotate the nut 24 and the nut 26 at the same time. When the worm gear 22 rotates, the shaft 23 rotates synchronously because the insert rod 42 on the gear 3 27 is engaged with the insert hole. When the shaft 23 is pressed down, the spring 25 connected to the nut 24 begins to be compressed. When the nut 24 is turned with a wrench, the bottom end of the spring 25 slides into the top of the nut 26. At the same time, the insertion rod 42 on the gear 27 is engaged with the insertion hole, the worm 22 remains stationary, and the shaft 23 can rotate relative to the worm 22, thereby realizing the rotation of the gear 27. When the rotation of the shaft 23 ends, the downward pressure applied to the nut 24 can be stopped. Under the elastic force of the spring 25 returning to its original position, the height of the shaft 23 rises, the height of the gear 27 rises synchronously, and after the height of the insert rod 42 rises, it is inserted into the socket again, completing the stationary state of the worm gear 22 and the shaft 23. Multiple sockets can be provided at the bottom of the worm gear 22, thereby reducing the difficulty of reconnecting the plug rod 42 to the socket and improving the efficiency of reset locking.

[0034] Example 8: Reference Figures 1-12 A ratchet 28 is connected to the worm gear 22. The ratchet 28 is in frictional engagement with one side of the end of the ratchet 29, and the other side of the end of the ratchet 28 is in contact engagement with the ratchet 29. The other end of the ratchet 29 is connected to the slide bar 30. The slide bar 30 is slidably connected to the upper cover 1. The other end of the ratchet 29 is connected to the upper cover 1 through the second spring 31.

[0035] The principles and beneficial effects of the above scheme are as follows: When the upper cover 1 and lower cover 2 are locked, and the pressure relief pipe 4 is also locked, the worm gear 22 stops rotating. To further enhance the sealing effect of the device, at this time, the other side of the end of the ratchet 29 contacts the straight edge of the tooth in the ratchet 28. During locking, the sliding rod 30 connected to the bottom of the upper cover 1 remains fixed, and the spring 21 applies elastic force to the ratchet 29 to prevent the ratchet 29 from moving. Thus, it can be seen that although the worm gear 21 and worm 22 have a locking effect, they are still affected by the vibration of natural gas pipelines during natural gas transportation, and by external vibrations after the device is sealed. To prevent external rotation, a second locking engagement is provided between ratchet 28 and ratchet 29. The locking direction of ratchet 28 and ratchet 29 is perpendicular to the locking direction of worm gear 21 and worm 22, further enhancing the stability of the device during locking. This prevents accidental unlocking of the device due to loosening between any set of components after a change in the direction of external force, thus ensuring the stability of the upper cover 1 and lower cover 2 during locking. This also prevents natural gas leakage after locking, increasing the safety of construction personnel and other auxiliary equipment near the equipment; furthermore, it prevents explosions caused by leaked natural gas encountering an open flame. When the worm gear 22 rotates, the ratchet 28 rotates synchronously. The helical edge of the upper tooth of the ratchet 28 engages with the helical edge of one side of the end of the ratchet 29 through friction. The second spring 31 is repeatedly compressed and reset, and the slide bar 30 slides repeatedly with the bottom surface of the upper cover 1 to prevent the ratchet 28 from getting stuck during rotation.

[0036] Example 9: Reference Figures 1-12 The top wall of the cover 1 is connected to the storage tank 32. The gear 33 is provided below the gear 37. The gear 33 is connected to the end of the piston rod 34. The piston rod 34 is connected to the end face of the piston 35. The piston rod 34 and the storage tank 32 are in sliding and sealed fit. The other side of the piston rod 34 is filled with working medium between it and the storage tank 32. The end of the output pipe 36 is connected to the inner wall of the storage tank 32.

[0037] Mounting grooves 37 are provided on the bottom surface of the top cover 1 and the bottom surface of the mounting plate 14. Multiple arc grooves 38 are provided in a linear array on the inner wall of the sealing arc 3. The two ends of the arc grooves 38 are connected to one side of the mounting groove 37. Mounting groove 2 39 is provided on the top surface of the bottom cover 2 and the other mounting plate 14. Multiple arc grooves 43 are provided in a linear array on the inner wall of the other sealing arc 3. An elastic sealing arc 40 is engaged in both the arc groove 38 and the arc groove 43. The ends of the two opposing elastic sealing arcs 40 are in contact and sealed. The two inner walls of the elastic sealing arc 40 are connected to the inner wall of the end of an elastic sealing tube 41. An elastic sealing tube 41 is engaged in both the mounting groove 37 and the mounting groove 39. The other end of the output tube 36 is connected to the inner wall of the elastic sealing arc 40. The output tube 36 is placed in the through hole 2 of the inner wall of the top cover 1 and the sealing arc 3. Two opposing elastic sealing tubes 41 make contact and seal together; The inner wall of one end of the elastic sealing arc 40 is connected to the end of the insertion tube 44, and the insertion tube 44 is inserted into and sealed with the insertion tube 45 at the end of the other elastic sealing arc 40. A one-way valve is installed inside the cannula 44; The bottom of the insertion tube 45 is connected to the inner wall of another elastic sealing arc 40. The top of the insertion tube 45 is connected to the bottom end of the spring 3 46. The top of the spring 3 46 is connected to the bottom surface of the sealing plate 47. The bottom surface of the sealing plate 47 is in contact with the top of the insertion tube 44. The insertion tube 44 is placed on the side wall inside the other elastic sealing arc 40 and has a guide hole 48. The guide hole 48 is located above the top of the auxiliary tube 49 connected to the insertion tube 45.

[0038] The principles and beneficial effects of the above scheme are as follows: A storage tank 32 is installed inside the device to store the working medium, which can be a compressible gas or a compressible liquid. When the gear 3 27 moves downward, it begins to mesh with the rack 2 33. When the gear 3 27 rotates, the rack 2 33, which is meshed with it, begins to move towards the storage tank 32. The piston rod 34 moves synchronously, which in turn drives the piston 35 to start compressing the working medium. The working medium is output through the output pipe 36. Since the output pipe 36, the elastic sealing arc 40 and the elastic sealing tube 41 all store working medium, and the elastic sealing arc 40 and the elastic sealing tube 41 are both made of highly elastic rubber, the side walls of multiple elastic sealing arcs 40 are respectively engaged in the arc groove 38 of the sealing arc 3 connected to the upper cover 1 and the arc groove 43 of another sealing arc 3 connected to the lower cover 2. The ends of the two oppositely arranged elastic sealing arcs 40 are in contact and fit together, and their ends are flat. Therefore, the ends of the two oppositely arranged elastic sealing arcs 40 are in contact and sealed together. Since a tube 44 is connected to an elastic sealing arc 40, and the tube 44 and the tube 45 are inserted and sealed together, the two elastic sealing arcs 40 arranged opposite to each other can form a connected sealing ring. Furthermore, an elastic sealing tube 41 is snapped into the mounting groove 37 of the mounting plate 14 connected to the upper cover 1 and the mounting groove 39 of the other mounting plate 14 connected to the lower cover 2. The planes of the two oppositely arranged elastic sealing tubes 41 are in contact with each other and sealed together, and the elastic sealing tube 41 is connected to the elastic sealing arc 40. Therefore, the other side of the elastic sealing arc 40 is used to make contact sealing with the natural gas pipeline. When the working medium in the output pipe 36 starts to be output, the elastic sealing arc 40 begins to expand, increasing the sealing effect between the elastic sealing arc 40 and the natural gas pipeline. Simultaneously, the elastic sealing pipe 41 increases the sealing effect between the upper cover 1 and the lower cover 2, as well as between the two mounting plates 14. After the expansion of multiple adjacent sealing rings in the arc groove 2 43, it can not only increase the sealing effect between the device and the natural gas pipeline, but also increase the friction of the device on the natural gas pipeline, preventing the device from moving along the natural gas pipeline, and thus avoiding exposing the leakage point to the outside of the device. Increased friction can also reduce the number of cleaning steps required for the outside of the natural gas pipeline, prevent slippage of the device, reduce cleaning time, and further improve the sealing effect and sealing speed of the device. Since the rotating shaft 23 can slide up and down with the worm gear 22, and the independent rotation of the rotating shaft 23 can independently convey the working medium, the operation between the two can be carried out separately. That is, after locking the upper cover 1 and the lower cover 2, the volume of the elastic sealing arc 40 and the elastic sealing tube 41 is increased. This operation can not only avoid deviation when the upper cover 1 and the lower cover 2 are in contact, but also prevent the already expanded elastic sealing arc 40 and the elastic sealing tube 41 from rubbing against each other or against each other during the installation of the device. This avoids the elastic sealing structure from twisting or being dented after installation, and avoids the phenomenon of device sealing failure caused by local aging of the elastic sealing structure after long-term use. Two elastic sealing arcs 40 are connected by a tube 44. Before the connection between the two elastic sealing arcs 40, the one-way valve inside the tube 44 of one elastic sealing arc 40 is closed, sealing its interior. Under the action of the spring force of spring three 46, the sealing disc 47 contacts and seals with the top of the auxiliary tube 49, sealing the interior of the other elastic sealing arc 40. Therefore, the working medium pre-stored inside the two elastic sealing arcs 40 will not leak. When the two elastic sealing arcs 40 are connected, the tube 44 lifts the sealing disc 47, and the guide hole 48 is placed inside the other elastic sealing arc 40. Spring three 46 is... By elongating the pipe, since the other end of the output pipe 36 is connected to the inner wall of another elastic sealing arc 40, the volume of the elastic sealing arc 40 and the elastic sealing tube 41 can be increased by changing the position of the piston 35. The device increases the volume of the elastic sealing arc 40 and the elastic sealing tube 41 by pre-storing the working medium in the elastic seal, which only requires fine adjustment of the position of the piston 35 in the storage tank 32. This reduces the design size of the storage tank 32. At the same time, it can ensure the internal sealing effect of the elastic sealing arc 40 and the elastic sealing tube 41 before the device is installed, and after connection, the working medium in the two elastic sealing arcs 40 can be quickly mixed.

[0039] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A rapid sealing device for leaking natural gas pipelines, characterized in that, include: The upper cover (1), lower cover (2), sealing arc (3), pressure relief pipe (4), sealing assembly and locking mechanism (5) are provided. The upper cover (1) and lower cover (2) are respectively connected to sealing arc (3) at both ends. The two sealing arcs (3) arranged opposite to each other are in contact to form a sealing pipe. The inner wall of the upper cover (1) is connected to the end of the pressure relief pipe (4). The other end of the pressure relief pipe (4) is located away from the side wall of the upper cover (1). The upper cover (1) is equipped with a sealing assembly. The upper cover (1) and lower cover (2) are sealed together by locking mechanism (5).

2. The rapid sealing device for a natural gas leaking pipeline according to claim 1, characterized in that, The sealing assembly includes a sealing plate (6) and a pressure relief hole (7). The top of a sealing plate (6) is slidably connected to the two inner walls of the upper cover (1). The sealing plate (6) has a pressure relief hole (7) which is connected to the pressure relief pipe (4). A transmission mechanism is connected to the sealing plate (6).

3. The rapid sealing device for a natural gas leaking pipeline according to claim 2, characterized in that, The transmission mechanism includes a rack (8), a gear (9) and a rotating shaft (10). The rack (8) is connected to the sealing plate (6). The rack (8) meshes with the gear (9). The gear (9) is connected to the rotating shaft (10). The rotating shaft (10) is rotatably connected to the top wall of the cover (1).

4. The rapid sealing device for a natural gas leaking pipeline according to claim 1, characterized in that, The locking mechanism (5) includes a locking rod (11), a double screw (12) and a slide groove (13). The upper cover (1) and the lower cover (2) are each connected to the end of a mounting plate (14). The two mounting plates (14) are arranged opposite to each other and are in contact with each other. A slide groove (13) is opened on the mounting plate (14). The bottom end of the locking rod (11) is slidably connected in the slide groove (13). A V-shaped slot (15) is opened on the bottom side wall of the locking rod (11). The two V-shaped slots (15) in one slide groove (13) are arranged in opposite directions. The V-shaped slot (15) is in contact with the end face of the mounting plate (14). The locking rod (11) is threadedly connected to one thread of the double screw (12). The double screw (12) is rotatably connected to the upper cover (1). The double screw (12) is connected to the transmission mechanism.

5. The rapid sealing device for a natural gas leaking pipeline according to claim 4, characterized in that, The transmission mechanism 2 includes: bevel gear (16), bevel gear 2 (17), rotating shaft 2 (18), helical gear (19) and helical gear 2 (20). The bevel gear (16) is connected to the twin screw (12). The bevel gear (16) meshes with the bevel gear 2 (17). The bevel gear 2 (17) is installed at the end of the rotating shaft 2 (18) located outside the side wall of the upper cover (1). The helical gear (19) is connected to the rotating shaft 2 (18). The rotating shaft 2 (18) is connected to the drive mechanism. The helical gear (19) meshes perpendicularly with the helical gear 2 (20) on the rotating shaft (10).

6. The rapid sealing device for a natural gas leaking pipeline according to claim 5, characterized in that, The drive mechanism includes a worm wheel (21) and a worm (22). The worm wheel (21) is connected to the rotating shaft (18). The worm wheel (21) is meshed with the worm (22). The worm (22) is rotatably sealed to the upper cover (1). The top of the worm (22) is positioned above the top of the upper cover (1).

7. A rapid sealing device for a natural gas leaking pipeline according to claim 6, characterized in that, The worm (22) has a through hole running through it longitudinally. A rotating shaft (23) is slidably sealed inside the through hole. The top of the rotating shaft (23) above the worm (22) is connected to a nut (24). The bottom of the nut (24) is connected to the top of a spring (25). The bottom of the spring (25) is slidably engaged with the top of a nut (26). The nut (26) is connected to the worm (22). The bottom of the rotating shaft (23) below the worm (22) is connected to a gear (27). The top of the gear (27) is connected to the bottom of a plug rod (42). The top of the plug rod (42) is inserted into the plug hole at the bottom of the worm (22).

8. A rapid sealing device for a natural gas leaking pipeline according to claim 7, characterized in that, A ratchet (28) is connected to the worm (22). The ratchet (28) is in frictional engagement with one side of the end of the ratchet (29). The other side of the end of the ratchet (28) is in contact with the ratchet (29). The other end of the ratchet (29) is connected to the slide bar (30). The slide bar (30) is slidably connected to the upper cover (1). The other end of the ratchet (29) is connected to the upper cover (1) through the second spring (31).

9. A rapid sealing device for a natural gas leaking pipeline according to claim 7, characterized in that, The top wall of the cover (1) is connected to the storage tank (32). The gear three (27) is provided with rack two (33). The rack two (33) is connected to the end of the piston rod (34). The piston rod (34) is connected to the end face of the piston (35). The piston rod (34) and the storage tank (32) are in sliding and sealed cooperation. The other side of the piston rod (34) is filled with working medium between it and the storage tank (32). The end of the output pipe (36) is connected to the inner wall of the storage tank (32).

10. A rapid sealing device for a natural gas leaking pipeline according to claim 9, characterized in that, Mounting grooves (37) are opened on the bottom surface of the top cover (1) and the bottom surface of the mounting plate (14). Multiple arc-shaped grooves (38) are opened in a straight line array on the inner wall of the sealing arc (3). The two ends of the arc-shaped grooves (38) are respectively connected to one side of a mounting groove (37). Mounting groove II (39) is opened on the top surface of the bottom cover (2) and another mounting plate (14). Multiple arc-shaped groove II (43) are opened in a straight line array on the inner wall of another sealing arc (3). Both the arc-shaped grooves (38) and the arc-shaped groove II (43) are fitted with... There is an elastic sealing arc (40), and the ends of the two opposing elastic sealing arcs (40) are in contact with each other. The two inner walls of the elastic sealing arc (40) are respectively connected to the inner wall of the end of an elastic sealing tube (41). The elastic sealing tube (41) is snapped into both the mounting groove (37) and the second mounting groove (39). The other end of the output tube (36) is connected to the inner wall of the elastic sealing arc (40). The output tube (36) is placed in the inner wall of the upper cover (1) and the through hole of the sealing arc (3).

Images