An end connection device for elastic sealing of underwater pipelines

Abstract

The present invention relates to the technical field of pipe fittings, and specifically relates to an end connection device for elastic sealing of underwater pipelines. It includes an outer pipe, a core pipe is inserted into one end of the outer pipe, a first flange is fixed at one end of the outer pipe, a second flange is sleeved and fixed on the pipe body of the core pipe, bolt holes are provided on the surfaces of the first flange and the second flange. A limiting groove is provided on the outer circumferential surface of the end of the core pipe extending into the outer pipe, a baffle is inserted into the outer wall of the outer pipe, and one end of the baffle is inserted into the limiting groove. A first rubber cover is provided on the inner wall of the outer pipe, one end of the first rubber cover is fixed on the surface of a collar, and the collar is slidably connected in the outer pipe. The beneficial effect is that the combination of insertion and screwing simplifies the installation process. The core pipe and the outer pipe are connected by insertion, and the first flange and the second flange are locked by screwing with a first screw and a first nut, without the need to precisely align the bolt holes; components such as the collar and the spring can be pre-assembled and then integrally installed on the pipeline, improving the installation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fittings, and specifically to an end connection device for elastic sealing of underwater pipelines. Background Technique

[0002] In the connection of underwater pipelines, ensuring the sealing and stability of the connection is crucial. Traditional underwater pipeline connection methods often use welding or bolt fastening methods. However, when dealing with complex underwater environments and long-term water flow impacts, these methods may have problems such as insufficient sealing and loose connections. To solve these problems, a series of end connection devices for elastic sealing of underwater pipelines have emerged on the market. However, these devices still have some deficiencies in actual applications, such as complex installation, poor sealing effect, and difficult maintenance.

[0003] Currently, most common underwater pipeline connection devices on the market use flange connection methods, fastening two flange plates together through bolts. However, this connection method requires precise alignment of bolt holes during installation, and the bolts are susceptible to corrosion and loosening, thus affecting the sealing of the connection. In addition, although some devices use elastic sealing elements such as rubber sealing rings, they cannot achieve deformation and expansion between two pipelines. Summary of the Invention

[0004] The purpose of the present invention is to provide an end connection device for elastic sealing of underwater pipelines to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An end connection device for elastic sealing of underwater pipelines includes an outer pipe. One end of the outer pipe is inserted with a core pipe. One end of the outer pipe is fixed with a first flange plate. A second flange plate is sleeved and fixed on the pipe body of the core pipe. Bolt holes are provided on the surfaces of the first flange plate and the second flange plate. One end of the core pipe extending into the outer pipe is provided with a limiting groove on the outer ring surface. A baffle is inserted into the outer wall of the outer pipe, and one end of the baffle is inserted into the limiting groove. A first rubber cover is provided on the inner wall of the outer pipe. One end of the first rubber cover is fixed on the surface of a collar, and the collar is slidably connected in the outer pipe. A first protective cover is sleeved and screwed at one end of the outer pipe. A turntable is rotatably connected inside the first protective cover. A first screw rod is fixed on the surface of the turntable. The first screw rod penetrates through the first flange plate and the second flange plate. A first nut is sleeved and screwed at the end of the first screw rod. A spring is provided between the first flange plate and the second flange plate. A second protective cover is inserted into one end of the first protective cover, and the second protective cover is sleeved and screwed on the pipe body of the core pipe.

[0006] Preferably, an embedding groove is formed in the inner ring opening of the first flange. The embedding groove is an annular groove. One end of the first rubber cover is fixed in the embedding groove. The collar is a circular ring plate with an "L"-shaped cross-section. The outer diameter of the collar is equal to the inner diameter of the outer pipe. A plurality of through holes are formed in the surface of the collar. A plug rod is inserted into the through hole. The rod length of the plug rod is greater than the plate thickness of the collar. One end of the plug rod is sleeved and fixed with a rubber chuck. The rubber chuck is a spherical structure. The diameter of the rubber chuck is greater than the aperture of the through hole.

[0007] Preferably, the limiting groove is an annular groove. An insertion opening is formed in the outer wall of the outer pipe. There are a plurality of insertion openings. The plurality of insertion openings are distributed around the outer pipe in a circumferential manner. The baffle is an arc-shaped plate. The baffle and the insertion opening correspond one by one. The baffle is inserted into the insertion opening. The height of the baffle is greater than the height of the insertion opening. One side of the baffle is provided with an inclined surface. After the first protective cover squeezes the baffle along the inclined surface into the insertion opening, one end of the baffle is inserted into the limiting groove. After the first rubber cover is tensioned and deformed by the baffle, it is clamped between the baffle and the limiting groove. One end of the first rubber cover is clamped between the core pipe and the outer pipe to generate elastic deformation.

[0008] Preferably, a through opening is formed in the surface of the baffle. An elastic rubber band is fixed to the top surface of the through opening. Two ends of the elastic rubber band are fixed to two parallel side walls of the insertion opening. After the first protective cover pushes the baffle, the baffle tensions the elastic rubber band to generate elastic deformation.

[0009] Preferably, the first protective cover is a circular pipe with an "L"-shaped cross-section. A reserved groove is formed in the inner wall of the first protective cover. The reserved groove is an annular groove. The turntable is a circular ring plate with an "L"-shaped cross-section. A retaining ring is sleeved on one end of the turntable. The outer ring surface of the retaining ring is fixed to the outer ring surface of the reserved groove. The inner diameter of the retaining ring is smaller than the outer diameter of the turntable. There are a plurality of first screw rods. After the first screw rod and the first nut are screwed and locked, one end of the baffle is located in the middle of the limiting groove.

[0010] Preferably, one end of the spring is fixed to the surface of the first flange. The other end of the spring is fixed with a spring connection ring. The spring connection ring is sleeved on the rod body of the first screw rod. Two first screw rods are fixed to one end of the spring connection ring. The first screw rods penetrate through through holes. The through holes are formed in the surface of the second flange. Nuts are sleeved and screwed at the ends of the first screw rods.

[0011] Preferably, an internal thread is provided at the inner ring opening of one end of the first protective cover. An external thread is provided on the outer wall of the outer pipe. The internal thread and the external thread are connected in a matching manner. A slot is formed at the other end of the first protective cover. The slot is an annular groove. The second protective cover is a circular pipe with an "L"-shaped cross-section. An internal thread is provided at the inner ring opening of one end of the second protective cover. An external thread is provided on the outer wall of the core pipe. The internal thread and the external thread are connected in a matching manner.

[0012] Preferably, a first side groove is formed on the outer circumferential surface of the slot, and a second side groove is formed on the inner circumferential surface of the slot. The first side groove and the second side groove are annular grooves. A first sealing ring is fixed inside the first side groove. The first sealing ring is sleeved on the second protective cover. The inner diameter of the first sealing ring is larger than the outer diameter of the second protective cover. The first sealing ring is clamped between the second protective cover and the first side groove to generate elastic deformation. A second sealing ring is sleeved and fixed in the second side groove. The outer diameter of the second sealing ring is larger than the inner diameter of the second protective cover. The second sealing ring is clamped between the second protective cover and the second side groove to generate elastic deformation.

[0013] Preferably, a connecting ring is fixed at one end of the first protective cover. A hand-tightening screw is screwed on the surface of the connecting ring. One end of the hand-tightening screw is inserted into the first clamping groove. The first clamping groove is formed on the outer wall of the outer pipe. The first clamping groove is an annular groove. A second rubber cover is fixed at one end of the first protective cover. An rubber ring is fixed at one end of the second rubber cover. The rubber ring is an annular structure with a circular cross-section. The rubber ring is sleeved in the second clamping groove. The second clamping groove is formed on the outer wall of the outer pipe. The second clamping groove is an annular groove with a circular opening at the break. The second rubber cover covers the connecting ring.

[0014] Preferably, a connecting ring is fixed at one end of the second protective cover. A hand-tightening screw is screwed on the surface of the connecting ring. One end of the hand-tightening screw is inserted into the first clamping groove. The first clamping groove is formed on the outer wall of the core pipe. The first clamping groove is an annular groove. A second rubber cover is fixed at one end of the second protective cover. An rubber ring is fixed at one end of the second rubber cover. The rubber ring is an annular structure with a circular cross-section. The rubber ring is sleeved in the second clamping groove. The second clamping groove is formed on the outer wall of the core pipe. The second clamping groove is an annular groove with a circular opening at the break. The second rubber cover covers the connecting ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The end connection device for underwater pipeline elastic sealing proposed by the present invention adopts a combination of plugging and screwing, which simplifies the installation process. The core pipe and the outer pipe are connected by plugging. The first flange and the second flange are locked by screwing the first screw and the first nut, without the need to precisely align the bolt holes. Components such as the collar and the spring can be pre-assembled and then installed on the pipeline as a whole, improving the installation efficiency. The designs of the first protective cover and the second protective cover enable the connection device to be easily maintained and inspected after installation. By screwing the hand-tightening screw, the protective cover can be easily disassembled to check and replace vulnerable parts such as the sealing ring. The setting of the second rubber cover and the rubber ring not only enhances the connection sealing performance but also facilitates the covering and protection of the connecting ring and the hand-tightening screw, prolonging the service life. And after the outer pipe and the core pipe are connected, the deformation and expansion between the two pipelines are also satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a top view of the structure of the present invention;

[0019] Figure 3 is Figure 2 Structural sectional view at E-E in the figure;

[0020] Figure 4 is Figure 3 Enlarged schematic view of the structure at A in the figure;

[0021] Figure 5 is Figure 3 Enlarged schematic view of the structure at B in the figure;

[0022] Figure 6 is Figure 4 Enlarged schematic view of the structure at C in the figure;

[0023] Figure 7 is Figure 4 Enlarged schematic view of the structure at D in the figure;

[0024] Figure 8 Schematic diagram of the connection structure between the turntable and the first screw of the present invention;

[0025] Figure 9 Schematic diagram of the connection structure between the collar and the second screw of the present invention;

[0026] Figure 10 Schematic diagram of the baffle structure of the present invention.

[0027] In the figure: outer tube 1, core tube 2, first flange 3, second flange 4, bolt hole 5, embedded groove 6, first rubber cover 7, collar 8, perforation 9, insertion rod 10, rubber chuck 11, limit groove 12, socket 13, baffle 14, through hole 15, rubber belt 16, first protective cover 17, reserved groove 18, turntable 19, retaining ring 20, first screw 21, first nut 22, spring connection ring 23, spring 24, through hole 25, second screw 26, second nut 27, slot 28, second protective cover 29, first side groove 30, second side groove 31, first sealing ring 32, second sealing ring 33, connection ring 34, hand-tightening screw 35, first card slot 36, second rubber cover 37, rubber ring 38, second card slot 39, third sealing ring 40. Detailed implementation manners

[0028] In order to clearly and completely describe the objectives, technical solutions and advantages of the present invention, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some but not all of the embodiments of the present invention, and are only used to explain the embodiments of the present invention, rather than to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0029] Please refer to Figures 1 to 10, the present invention provides a technical solution: an end connection device for elastic sealing of an underwater pipeline, including an outer pipe 1, a core pipe 2 is inserted at one end of the outer pipe 1, a first flange 3 is fixed at one end of the outer pipe 1, and a second flange 4 is sleeved and fixed on the pipe body of the core pipe 2. Bolt holes 5 are provided on the surfaces of the first flange 3 and the second flange 4. A limiting groove 12 is provided on the outer circumferential surface of the end of the core pipe 2 extending into the outer pipe 1. A baffle 14 is inserted into the outer wall of the outer pipe 1, and one end of the baffle 14 is inserted into the limiting groove 12. A first rubber cover 7 is provided on the inner wall of the outer pipe 1, and one end of the first rubber cover 7 is fixed on the surface of a collar 8. The collar 8 is slidably connected in the outer pipe 1. An embedding groove 6 is provided at the inner ring opening of the first flange 3. The embedding groove 6 is an annular groove, and one end of the first rubber cover 7 is fixed in the embedding groove 6. The collar 8 is a circular ring plate with an "L"-shaped cross section. The outer diameter of the collar 8 is equal to the inner diameter of the outer pipe 1. A plurality of through holes 9 are provided on the surface of the collar 8. A plug rod 10 is inserted into the through hole 9. The rod length of the plug rod 10 is greater than the plate thickness of the collar 8. A rubber chuck 11 is sleeved and fixed at one end of the plug rod 10. The rubber chuck 11 is a spherical structure, and the diameter of the rubber chuck 11 is greater than the aperture of the through hole 9. The limiting groove 12 is an annular groove. An insertion port 13 is provided on the outer wall of the outer pipe 1. There are a plurality of insertion ports 13, and the plurality of insertion ports 13 are distributed circumferentially around the outer pipe 1. The baffle 14 is an arc plate, and the baffle 14 and the insertion port 13 correspond one by one. The baffle 14 is inserted into the insertion port 13. The height of the baffle 14 is greater than the height of the insertion port 13. One side of the baffle 14 is provided with an inclined surface. After a first protective cover 17 squeezes the baffle 14 along the inclined surface into the insertion port 13, one end of the baffle 14 is inserted into the limiting groove 12. After the first rubber cover 7 is tensioned and deformed by the baffle 14, it is clamped between the baffle 14 and the limiting groove 12. One end of the first rubber cover 7 is clamped between the core pipe 2 and the outer pipe 1 to generate elastic deformation. A through opening 15 is provided on the surface of the baffle 14. An elastic rubber band 16 is fixed on the top surface of the through opening 15. The two ends of the elastic rubber band 16 are fixed on the two parallel side walls of the insertion port 13. After the first protective cover 17 pushes the baffle 14, the baffle 14 tensions the elastic rubber band 16 to generate elastic deformation.

[0030] In use, the core pipe 2 and the outer pipe 1 are respectively fixed on two underwater pipelines for connecting the two underwater pipelines. Before the end of the core pipe 2 is inserted into the outer pipe 1, the pulling collar 8 is pulled out from the outer pipe 1, and then the collar 8 is leaned against the end of the core pipe 2. At this time, the insertion rod 10 is inserted into the through hole 9, and the rubber chuck 11 passes through the through hole 9. Then the core pipe 2 is pushed into the outer pipe 1. At this time, the collar 8 is pushed by the core pipe 2, and the collar 8 stretches the rubber cover 7 to deform. One end of the rubber cover 7 is clamped between the core pipe 2 and the outer pipe 1 to fill the gap between the core pipe 2 and the outer pipe 1, so as to realize the seal after the core pipe 2 is inserted into the outer pipe 1. Rotate the protective cover 17 towards the flange 3. During the process of the protective cover 17 advancing along the outer pipe 1, the protective cover 17 squeezes the baffle 14 into the through opening 15 along the inclined surface, and the baffle 14 stretches the rubber belt 16 and the rubber cover 7 to deform. After one end of the baffle 14 extends into the limit groove 12, the distance between the baffle 14 and the side walls on both sides of the limit groove 12 is equal. When the outer pipe 1 and the core pipe 2 move relative to each other, that is, when the core pipe 2 moves into the inner part of the outer pipe 1 along the outer pipe 1, when the baffle 14 contacts the side wall of the limit groove 12, the relative movement distance between the outer pipe 1 and the core pipe 2 is restricted. When the protective cover 17 is pulled back, when the inner ring opening of the protective cover 17 no longer covers the baffle 14, the rubber belt 16 and the protective cover 17 rebound, and one end of the baffle 14 is retracted into the socket 13. At this time, the baffle 14 no longer limits the core pipe 2, which is convenient for pulling the core pipe 2 out of the outer pipe 1.

[0031] One end of the outer pipe 1 is sleeved and screwed with a protective cover 17. A turntable 19 is rotatably connected inside the protective cover 17. A screw rod 21 is fixed on the surface of the turntable 19. The screw rod 21 penetrates through the flange 3 and the flange 4. A nut 22 is sleeved and screwed at the end of the screw rod 21. The protective cover 17 is a circular pipe with an "L"-shaped cross section. A reserved groove 18 is opened on the inner wall of the protective cover 17. The reserved groove 18 is an annular groove. The turntable 19 is an annular plate with an "L"-shaped cross section. A retaining ring 20 is sleeved at one end of the turntable 19. The outer ring surface of the retaining ring 20 is fixed on the outer ring surface of the reserved groove 18. The inner ring diameter of the retaining ring 20 is smaller than the outer ring diameter of the turntable 19. There are multiple screw rods 21. After the screw rod 21 and the nut 22 are screwed and locked, one end of the baffle 14 is located in the middle of the limit groove 12. A spring 24 is arranged between the flange 3 and the flange 4. One end of the spring 24 is fixed on the surface of the flange 3. The other end of the spring 24 is fixed with a spring connection ring 23. The spring connection ring 23 is sleeved on the rod body of the screw rod 21. Two screw rods 26 are fixed at one end of the spring connection ring 23. The screw rods 26 penetrate through the through holes 25. The through holes 25 are opened on the surface of the flange 4. Nuts 27 are sleeved and screwed at the ends of the screw rods 26.

[0032] In use, the spring connection ring 23 and the spring 24 are sleeved on the first screw rod 21 in advance. At this time, the second screw rod 26 passes through the through hole 25, and the second nut 27 is sleeved and screwed on the second screw rod 26. After the first protective cover 17 covers and presses the baffle 14, the first screw rod 21 passes through the bolt holes 5 on the surfaces of the first flange 3 and the second flange 4, and the first nut 22 is sleeved and screwed on the rod body of the first screw rod 21. At this time, the spring 24 is elastically clamped between the first flange 3 and the second flange 4. When the core pipe 2 moves into the outer pipe 1, the first flange 3 and the second flange 4 squeeze the spring 24 to deform, and the resilience of the spring 24 pushes the first flange 3 and the second flange 4 to reset to the original distance; it should be noted that when the first protective cover 17 rotates, when one end of the first screw rod 21 is inserted into the bolt hole 5, after rotating the first protective cover 17, the turntable 19 and the first protective cover 17 move relative to each other.

[0033] One end of the first protective cover 17 is inserted with the second protective cover 29. The second protective cover 29 is sleeved and screwed on the tube body of the core tube 2. An inner thread one is provided at the inner ring opening at one end of the first protective cover 17, and an outer thread one is provided on the outer wall of the outer tube 1. The inner thread one and the outer thread one are connected in cooperation. A slot 28 is opened at the other end of the first protective cover 17. The slot 28 is an annular groove. The second protective cover 29 is a circular tube with an "L"-shaped cross section. An inner thread two is provided at the inner ring opening at one end of the second protective cover 29, and an outer thread two is provided on the outer wall of the core tube 2. The inner thread two and the outer thread two are connected in cooperation. A first side groove 30 is opened on the outer ring surface of the slot 28, and a second side groove 31 is opened on the inner ring surface of the slot 28. The first side groove 30 and the second side groove 31 are annular grooves. A first sealing ring 32 is fixed inside the first side groove 30. The first sealing ring 32 is sleeved on the second protective cover 29. The inner ring diameter of the first sealing ring 32 is larger than the outer diameter of the second protective cover 29. The first sealing ring 32 is clamped between the second protective cover 29 and the first side groove 30 to generate elastic deformation. A second sealing ring 33 is sleeved and fixed in the second side groove 31. The outer diameter of the second sealing ring 33 is larger than the inner diameter of the second protective cover 29. The second sealing ring 33 is clamped between the second protective cover 29 and the second side groove 31 to generate elastic deformation; A connecting ring 34 is fixed at one end of the first protective cover 17. A hand-tightening screw 35 is screwed on the surface of the connecting ring 34. One end of the hand-tightening screw 35 is inserted into a first clamping groove 36. The first clamping groove 36 is opened on the outer wall of the outer tube 1. The first clamping groove 36 is an annular groove. A second rubber cover 37 is fixed at one end of the first protective cover 17. A rubber ring 38 is fixed at one end of the second rubber cover 37. The rubber ring 38 is a circular ring structure with a circular cross section. The rubber ring 38 is sleeved in a second clamping groove 39. The second clamping groove 39 is opened on the outer wall of the outer tube 1. The second clamping groove 39 is an annular groove with a circular opening at the break. The second rubber cover 37 covers the connecting ring 34; A connecting ring 34 is fixed at one end of the second protective cover 29. A hand-tightening screw 35 is screwed on the surface of the connecting ring 34. One end of the hand-tightening screw 35 is inserted into the first clamping groove 36. The first clamping groove 36 is opened on the outer wall of the core tube 2. The first clamping groove 36 is an annular groove. A second rubber cover 37 is fixed at one end of the second protective cover 29. A rubber ring 38 is fixed at one end of the second rubber cover 37. The rubber ring 38 is a circular ring structure with a circular cross section. The rubber ring 38 is sleeved in the second clamping groove 39. The second clamping groove 39 is opened on the outer wall of the core tube 2. The second clamping groove 39 is an annular groove with a circular opening at the break. The second rubber cover 37 covers the connecting ring 34.

[0034] During use, after the first protective cover 17 squeezes and covers the baffle 14, turn the second rubber cover 37 outwards, then screw in the hand-tightening screw 35 and insert it into the first card slot 36. At this time, braking of the first protective cover 17 is achieved. Then turn the second rubber cover 37 back and push the rubber ring 38 into the second card slot 39. At this time, the second rubber cover 37 covers the connecting ring 34 and the hand-tightening screw 35. When the second protective cover 29 is adjusted so that one end of the second protective cover 29 is inserted into the slot 28 and there is still a distance reserved for pushing between the end of the second protective cover 29 and the inner wall of the slot 28, brake the second protective cover 29 through the hand-tightening screw 35 according to the above operation, and then cover the connecting ring 34 and the hand-tightening screw 35 with the second rubber cover 37. When the core pipe 2 moves inside the outer pipe 1, one end of the second protective cover 29 moves along the slot 28 into the slot 28. The first protective cover 17 and the second protective cover 29 not only resist the impact of lateral water flow, but also the second sealing ring 33 and the first sealing ring 32 are sleeved on the inner and outer sides of the second protective cover 29 to seal the insertion part of the slot 28 and the second protective cover 29, thereby improving the sealing performance after the connection of the outer pipe 1 and the core pipe 2. In addition, the first protective cover 17 and the second protective cover 29 jointly protect the connection structure on the first flange 3 and the second flange 4. A third sealing ring 40 is fixed on the inner ring surface of the connecting ring 34, and the third sealing ring 40 improves the sealing performance between the connecting ring 34 and the outer pipe 1 and the core pipe 2.

[0035] The process of using the end connection device for elastic sealing of underwater pipelines is as follows:

[0036] Fix the core pipe 2 and the outer pipe 1 to two underwater pipes to be connected respectively. Place the collar 8 against the end of the core pipe 2 to ensure that one end of the rubber cover 7 can be fixed in the embedding groove 6. Push the core pipe 2 into the outer pipe 1. The collar 8 is pushed accordingly, and the rubber cover 7 deforms to fill the gap between the core pipe 2 and the outer pipe 1. Align the first flange 3 and the second flange 4 through the bolt holes 5 to ensure that the first screw 21 can pass through smoothly. Rotate the first protective cover 17 so that the turntable 19 drives the first screw 21 to pass through the first flange 3 and the second flange 4, and then screw the first nut 22 for fixation. At the same time, ensure that the spring 24 is clamped between the first flange 3 and the second flange 4. The spring connection ring 23 and the second screw 26 are fixed through the through hole 25, and the second nut 27 is screwed. During the advancement of the first protective cover 17, the baffle 14 is squeezed into the socket 13 through the inclined surface, and the baffle 14 deforms by stretching the rubber belt 16. After one end of the baffle 14 extends into the limit groove 12, ensure that the distance between the baffle 14 and the side walls on both sides of the limit groove 12 is equal. Slip the second protective cover 29 over the core pipe 2 and screw it in place. Adjust the position of the second protective cover 29 so that one end can be smoothly inserted into the slot 28 of the first protective cover 17. Ensure that the first sealing ring 32 and the second sealing ring 33 are clamped on the inner and outer sides of the second protective cover 29 and the slot 28 respectively. Turn the rubber cover 2 37 outwards, screw the hand-tightening screw 35 into the first slot 36 to brake the first protective cover 17 and the second protective cover 29. Turn the rubber cover 2 37 back, push the rubber ring 38 into the second slot 39 to cover the connecting ring 34 and the hand-tightening screw 35. Check whether the sealing components such as the rubber cover 7, the first sealing ring 32, the second sealing ring 33 and the rubber ring 38 are installed in place to ensure no leakage. A pressure test can be carried out to verify the sealing performance of the connecting device. Try to move the position of the core pipe 2 relative to the outer pipe 1 to ensure that the limiting effect of the baffle 14 in the limit groove 12 is effective. Observe whether the resilience of the spring 24 can make the first flange 3 and the second flange 4 return to their original spacing after being squeezed. Confirm that all connecting parts and fasteners are correctly installed and tightened. Check whether the first protective cover 17 and the second protective cover 29 can effectively resist the impact of lateral water flow. After the underwater pipe connecting device is installed, it can be used normally. Regularly check the sealing performance and stability of the connecting device to ensure that it is in good working condition. Regularly clean and lubricate the connecting device to extend its service life. If it is found that the sealing components are aged or damaged, they should be replaced in time. Regularly check whether the fasteners are loose. If they are loose, tighten them in time.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made therein without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An end connection device for elastic sealing of underwater pipelines, comprising an outer tube, one end of which is plugged with a core tube, one end of which is fixed with a flange plate 1, a tube body of the core tube is sleeved with a flange plate 2, and the surfaces of the flange plate 1 and the flange plate 2 are both provided with bolt holes, characterized in that: The end of the core tube extending into the outer tube is provided with a limiting groove on the outer ring surface, the outer wall of the outer tube is plugged with a baffle, one end of the baffle is inserted into the limiting groove, the inner wall of the outer tube is provided with a rubber cover, one end of the rubber cover is fixed on the surface of the collar, the collar is slidably connected in the outer tube, one end of the outer tube is sleeved with a protective cover screwed, the inner rotation of the protective cover is connected with a turntable, the surface of the turntable is fixed with a screw rod, the screw rod passes through the flange plate and the flange plate, the end of the screw rod is sleeved with a nut screwed, and a spring is provided between the flange plate and the flange plate, one end of the protective cover is plugged with a protective cover, and the protective cover is sleeved on the tube body of the core tube; the limiting groove is an annular groove, the outer wall of the outer tube is provided with a socket, a plurality of sockets are provided, and the plurality of sockets are distributed in a circle around the outer tube, the baffle is an arc plate, the baffle and the socket correspond one to one, and the baffle The plate is inserted into the socket, the height of the baffle is greater than the height of the socket, and a slope is provided on one side of the baffle. After the protective cover pushes the baffle into the socket along the slope, one end of the baffle is inserted into the limit groove. After the rubber cover is stretched and deformed by the baffle, it is clamped between the baffle and the limit groove. One end of the rubber cover is clamped between the core tube and the outer tube to generate elastic deformation. A through hole is opened on the surface of the baffle, and a rubber belt is fixed on the top surface of the through hole. The two ends of the rubber belt are fixed on two parallel side walls of the socket. After the protective cover pushes the baffle, the baffle stretches the rubber belt to generate elastic deformation. An embedded groove is opened on the inner ring of the flange, and the embedded groove is an annular groove. One end of the rubber cover is fixed in the embedded groove. The sleeve is a circular ring plate with an "L"-shaped cross section. The outer ring diameter of the sleeve is equal to the inner ring diameter of the outer tube. The sleeve (8) is against the end of the core tube (2).

2. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: The surface of the ring is provided with a plurality of through holes, and a plug rod is inserted into the inside of the through hole. The length of the plug rod is greater than the thickness of the ring. A rubber clamp is fixed on one end of the plug rod. The rubber clamp is spherical in structure, and the diameter of the rubber clamp is greater than the aperture of the through hole.

3. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: The protective cover is a round tube with an "L"-shaped cross section, and a reserved groove is opened on the inner wall of the protective cover, and the reserved groove is a circular ring groove. The turntable is a circular ring plate with an "L"-shaped cross section. A retaining ring is sleeved on one end of the turntable, and the outer ring surface of the retaining ring is fixed on the outer ring surface of the reserved groove. The inner ring diameter of the retaining ring is smaller than the outer ring diameter of the turntable. A plurality of screw rods are provided. After the screw rods and the nut are screwed and locked, one end of the baffle is located in the middle of the limit groove.

4. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: One end of the spring is fixed on the surface of flange plate 1, and the other end of the spring is fixed with a spring connecting ring, which is sleeved on the rod body of screw rod 1. One end of the spring connecting ring is fixed with two screw rods 2, which pass through a through hole, which is opened on the surface of flange plate 2, and the end of screw rod 2 is sleeved with a nut 2 which is threadedly connected.

5. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: The inner ring opening at one end of the protective cover is provided with an internal thread one, the outer wall of the outer tube is provided with an external thread one, the internal thread one and the external thread one are matched and connected, the other end of the protective cover is provided with a slot, the slot is an annular groove, the protective cover two is a round tube with an "L"-shaped cross-section, the inner ring opening at one end of the protective cover two is provided with an internal thread two, the outer wall of the core tube is provided with an external thread two, the internal thread two and the external thread two are matched and connected.

6. The underwater pipeline elastic sealing end connection device according to claim 5, characterized in that: The outer ring surface of the slot is provided with a side groove 1, and the inner ring surface of the slot is provided with a side groove 2. The side groove 1 and the side groove 2 are circular grooves. A sealing ring 1 is fixed inside the side groove 1. A set of sealing rings is arranged on the protective cover 2. The inner ring diameter of the sealing ring 1 is larger than the outer diameter of the protective cover 2. The sealing ring 1 is clamped between the protective cover 2 and the side groove 1 to generate elastic deformation. The sealing ring 2 is set and fixed in the side groove 2. The outer diameter of the sealing ring 2 is larger than the inner diameter of the protective cover 2. The sealing ring 2 is clamped between the protective cover 2 and the side groove 2 to generate elastic deformation.

7. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: A connecting ring is fixed at one end of the protective cover, a hand screw is threaded on the surface of the connecting ring, one end of the hand screw is inserted in a slot, the slot is arranged on the outer wall of the outer tube, and the slot is an annular groove. A rubber cover is fixed at one end of the protective cover, a rubber ring is fixed at one end of the rubber cover, and the rubber ring is a circular ring structure with a circular cross section. The rubber ring is sleeved in the slot, the slot is arranged on the outer wall of the outer tube, and the slot is an annular groove with a circular cross section. The rubber cover covers the connecting ring.

8. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: A connecting ring is fixed at one end of the second protective cover, a hand-tightened screw is threaded on the surface of the connecting ring, one end of the hand-tightened screw is inserted in a slot one, the slot one is arranged on the outer wall of the core tube, the slot one is an annular groove, a rubber cover is fixed at one end of the second protective cover, a rubber ring is fixed at one end of the second rubber cover, the rubber ring is a circular ring structure with a circular cross section, the rubber ring is sleeved in the slot two, the slot two is arranged on the outer wall of the core tube, the slot two is an annular groove with a circular cross section, and the second pair of rubber covers covers the connecting ring.

Images