End connecting device for elastic sealing of underwater pipeline

Abstract

The invention relates to the technical field of pipe connectors, in particular to an underwater pipeline elastic sealing end connecting device which comprises an outer pipe, a core pipe is inserted into one end of the outer pipe, a first flange plate is fixed to one end of the outer pipe, a pipe body of the core pipe is fixedly sleeved with a second flange plate, and bolt holes are formed in the surfaces of the first flange plate and the second flange plate. A limiting groove is formed in the outer ring face of the end, extending into the outer pipe, of the core pipe, a baffle is inserted into the outer wall of the outer pipe, one end of the baffle is inserted into the limiting groove, a first rubber cover is arranged on the inner wall of the outer pipe, one end of the first rubber cover is fixed to the surface of a lantern ring, and the lantern ring is slidably connected into the outer pipe. The beneficial effects of the invention are that the installation process is simplified by adopting a mode of combining plug-in connection and screw connection. The core pipe and the outer pipe are connected in an inserted mode, the first flange plate and the second flange plate are locked in a screwed mode through the first screw and the first nut, and bolt holes do not need to be accurately aligned. And the lantern ring, the spring and other components can be assembled in advance and then integrally mounted on the pipeline, so that the mounting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe connectors, in particular to an end connection device for elastic sealing of underwater pipelines. Background Art

[0002] In the connection of underwater pipelines, it is crucial to ensure the sealing and stability of the connection. Traditional underwater pipeline connection methods often use welding or bolting, but these methods may have problems such as insufficient sealing and loose connections when dealing with complex underwater environments and long-term water flow impact. In order to solve these problems, a series of underwater pipeline elastic sealing end connection devices have appeared on the market. However, these devices still have some shortcomings in practical applications, such as complex installation, poor sealing effect, and difficult maintenance.

[0003] At present, most of the common underwater pipe connection devices on the market use flange connection, which fastens two flanges together with bolts. However, this connection method requires precise alignment of bolt holes during installation, and the bolts are susceptible to corrosion and loosening, which affects 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 the two pipes. Summary of the invention

[0004] The object 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-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an end connection device for elastic sealing of underwater pipelines, comprising an outer tube, a core tube is inserted into one end of the outer tube, a flange plate 1 is fixed to one end of the outer tube, a flange plate 2 is sleeved and fixed on the tube body of the core tube, bolt holes are provided on the surfaces of the flange plate 1 and the flange plate 2, a limiting groove is provided on the outer ring surface of the end of the core tube extending into the outer tube, a baffle is inserted into the outer wall of the outer tube, one end of the baffle is inserted into the limiting groove, a rubber cover 1 is provided on the inner wall of the outer tube, one end of the rubber cover 1 is fixed to the surface of the collar, the collar is slidably connected to the outer tube, a protective cover 1 is sleeved and threadedly connected to one end of the outer tube, a rotating disk is rotatably connected to the inside of the protective cover 1, a screw rod 1 is fixed to the surface of the rotating disk, the screw rod 1 passes through the flange plate 1 and the flange plate 2, a nut 1 is sleeved and threadedly connected to the end of the screw rod 1, and a spring is provided between the flange plate 1 and the flange plate 2, a protective cover 2 is inserted into one end of the protective cover 1, and the protective cover 2 is sleeved and threadedly connected to the tube body of the core tube.

[0006] Preferably, the inner ring opening of the flange plate is provided with an embedding groove, which is an annular groove, one end of the rubber cover is fixed in the embedding groove, the ring is a circular ring plate with an "L"-shaped cross-section, the outer ring diameter of the ring is equal to the inner ring diameter of the outer tube, and a plurality of through holes are provided on the surface of the ring, and a plug rod is inserted into the inside of the through hole, the rod length of the plug rod is greater than the plate thickness of the ring, and a rubber clamp is fixed on one end of the plug rod, the rubber clamp is a spherical structure, and the diameter of the rubber clamp is greater than the aperture of the through hole.

[0007] Preferably, the limiting groove is an annular groove, the outer wall of the outer tube is provided with a socket, and there are multiple sockets, which are distributed in a circle around the outer tube, the baffle is an arc plate, the baffle and the socket correspond one to one, the baffle is inserted in the socket, the height of the baffle is greater than the height of the socket, and an inclined surface is provided on one side of the baffle. After the protective cover pushes the baffle into the socket along the inclined surface, one end of the baffle is inserted into the limiting groove, and after the rubber cover is stretched and deformed by the baffle, it is clamped between the baffle and the limiting groove, and one end of the rubber cover is clamped between the core tube and the outer tube to produce elastic deformation.

[0008] Preferably, the surface of the baffle is provided with a hole, a rubber band is fixed to the top surface of the hole, and the two ends of the rubber band are fixed on two parallel side walls of the socket. When the protective cover pushes the baffle, the baffle pulls the rubber band to produce elastic deformation.

[0009] Preferably, the protective cover is a round tube with an "L"-shaped cross-section, and a reserved groove is provided on the inner wall of the protective cover, 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, 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, and a plurality of screws are provided. After the screw and the nut are screwed and locked, one end of the baffle is located in the middle of the limit groove.

[0010] Preferably, one end of the spring is fixed on the surface of flange one, and the other end of the spring is fixed with a spring connecting ring, which is sleeved on the rod body of screw one, and one end of the spring connecting ring is fixed with two screws two, which pass through a through hole, which is opened on the surface of flange two, and the end of the screw two is sleeved with a nut two which is threadedly connected.

[0011] Preferably, an inner ring opening at one end of the protective cover one is provided with an internal thread one, an 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, a slot is opened at the other end of the protective cover one, the slot is an annular groove, the protective cover two is a round tube with an "L"-shaped cross-section, an inner ring opening at one end of the protective cover two is provided with an internal thread two, an 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.

[0012] Preferably, the outer ring surface of the slot is provided with side groove 1, the inner ring surface of the slot is provided with side groove 2, side groove 1 and 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 produce 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, and the sealing ring 2 is clamped between the protective cover 2 and the side groove 2 to produce elastic deformation.

[0013] Preferably, a connecting ring is fixed to one end of the protective cover one, 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 outer tube, the slot one is an annular groove, a rubber cover two is fixed to one end of the protective cover one, a rubber ring is fixed to one end of the rubber cover two, the rubber ring is an annular 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 outer tube, the slot two is an annular groove with a circular cross-section, and the rubber cover two covers the connecting ring.

[0014] Preferably, a connecting ring is fixed to one end of the protective cover 2, a hand screw is threaded on the surface of the connecting ring, one end of the hand screw is inserted in a slot 1, the slot 1 is arranged on the outer wall of the core tube, the slot 1 is an annular groove, a rubber cover 2 is fixed to one end of the protective cover 2, a rubber ring is fixed to one end of the rubber cover 2, the rubber ring is in a circular ring structure with a circular cross-section, the rubber ring is sleeved in the slot 2, the slot 2 is arranged on the outer wall of the core tube, the slot 2 is an annular groove with a circular cross-section, and the rubber cover 2 covers the connecting ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The end connection device for elastic sealing of underwater pipelines proposed by the present invention adopts a combination of plug-in and screw connection to simplify the installation process. The core tube and the outer tube are connected by plug-in, and the flange plate 1 and the flange plate 2 are screwed and locked by screw rod 1 and nut 1, without the need to accurately align the bolt holes; the components such as the collar and the spring can be pre-assembled and then installed on the pipeline as a whole, which improves the installation efficiency; the design of the protective cover 1 and the protective cover 2 allows the connection device to be easily maintained and inspected after installation. The protective cover can be easily disassembled by screwing the hand screw, and the wearing parts such as the sealing ring can be checked and replaced; the setting of the rubber cover 2 and the rubber ring not only enhances the sealing of the connection, but also facilitates the covering and protection of the connecting ring and the hand screw, and prolongs the service life; and after the outer tube and the core tube are connected, the deformation and expansion between the two pipelines can also be satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a top view of the structure of the present invention; Figure 3 for Figure 2 Structural cross-section view at EE in the middle; Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5 for Figure 3 A magnified schematic diagram of the structure at B in the middle; Figure 6 for Figure 4 A magnified schematic diagram of the structure at C in the middle; Figure 7 for Figure 4 A magnified schematic diagram of the structure at D in the middle; Figure 8 It is a schematic diagram of the connection structure between the turntable and the screw rod of the present invention; Fig. 9 This is a schematic diagram of the connection structure between the collar and the screw rod of the present invention; Fig.10 It is a schematic diagram of the baffle structure of the present invention.

[0017] In the figure: outer tube 1, core tube 2, flange 1 3, flange 2 4, bolt hole 5, embedded groove 6, rubber cover 1 7, collar 8, perforation 9, plug rod 10, rubber clamp 11, limit groove 12, socket 13, baffle 14, perforation 15, rubber belt 16, protective cover 1 17, reserved groove 18, turntable 19, retaining ring 20, screw 1 21, nut 1 22, spring connecting ring 23, spring 24, through hole 25, screw 2 26, nut 2 27, slot 28, protective cover 2 29, side groove 1 30, side groove 2 31, sealing ring 1 32, sealing ring 2 33, connecting ring 34, hand screw 35, card slot 1 36, rubber cover 2 37, rubber ring 38, card slot 2 39, sealing ring 3 40. DETAILED DESCRIPTION

[0018] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 10The present invention provides a technical solution: an end connection device for elastic sealing of underwater pipelines, comprising an outer tube 1, a core tube 2 is inserted into one end of the outer tube 1, a flange 3 is fixed to one end of the outer tube 1, a flange 4 is fixedly mounted on the tube body of the core tube 2, and bolt holes 5 are provided on the surfaces of the flange 3 and the flange 4, a limiting groove 12 is provided on the outer ring surface of the end of the core tube 2 extending into the outer tube 1, a baffle 14 is inserted into the outer wall of the outer tube 1, one end of the baffle 14 is inserted into the limiting groove 12, and the inner wall of the outer tube 1 is provided with A rubber cover 7 is provided, one end of the rubber cover 7 is fixed on the surface of a sleeve 8, the sleeve 8 is slidably connected in the outer tube 1, an inner ring opening of the flange 3 is provided with an embedding groove 6, the embedding groove 6 is an annular groove, one end of the rubber cover 7 is fixed in the embedding groove 6, the sleeve 8 is an annular plate with an "L"-shaped cross section, the outer ring diameter of the sleeve 8 is equal to the inner ring diameter of the outer tube 1, a plurality of through holes 9 are provided on the surface of the sleeve 8, a plug rod 10 is inserted into the inside of the through hole 9, the rod length of the plug rod 10 is greater than the plate thickness of the sleeve 8, and one end of the plug rod 10 is sleeved and fixed with The rubber clamp 11 is a spherical structure, and the diameter of the rubber clamp 11 is larger than the aperture of the through hole 9; the limiting groove 12 is an annular groove, and the outer wall of the outer tube 1 is provided with a socket 13, and the socket 13 is provided with a plurality of sockets, and the plurality of sockets 13 are distributed in a circle around the outer tube 1, and the baffle 14 is an arc plate, and the baffle 14 and the socket 13 correspond one to one, and the baffle 14 is plugged into the socket 13, and the height of the baffle 14 is greater than the height of the socket 13, and a slope is provided on one side of the baffle 14, and the protective cover 17 pushes the baffle 14 along the slope to insert After the opening 13 is inserted, one end of the baffle 14 is inserted into the limiting groove 12. After the rubber cover 7 is stretched and deformed by the baffle 14, it is clamped between the baffle 14 and the limiting groove 12. One end of the rubber cover 7 is clamped between the core tube 2 and the outer tube 1 to produce elastic deformation. A through hole 15 is opened on the surface of the baffle 14, and a rubber belt 16 is fixed on the top surface of the through hole 15. The two ends of the rubber belt 16 are fixed on two parallel side walls of the socket 13. After the protective cover 17 pushes the baffle 14, the baffle 14 stretches the rubber belt 16 to produce elastic deformation.

[0020] When in use, the core tube 2 and the outer tube 1 are respectively fixed on two underwater pipes for connecting the two underwater pipes; before the end of the core tube 2 is inserted into the outer tube 1, the pull-out collar 8 is pulled out of the outer tube 1, and then the collar 8 is placed against the end of the core tube 2. At this time, the insertion rod 10 is inserted into the through hole 9, and the rubber clamp 11 passes through the through hole 9, and then the core tube 2 is pushed into the outer tube 1. At this time, the collar 8 is pushed by the core tube 2, and the collar 8 stretches the rubber cover 7 to deform, and one end of the rubber cover 7 is clamped between the core tube 2 and the outer tube 1 to fill the gap between the core tube 2 and the outer tube 1, thereby achieving sealing after the core tube 2 is inserted into the outer tube 1; the protective cover 17 is rotated to move toward the flange 3. During the process of the protective cover 17 being pushed along the outer tube 1, the protective cover 17 is rotated to move toward the flange 3. 17 squeezes the baffle 14 into the through-hole 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 limiting groove 12, the baffle 14 is at an equal distance from the side walls on both sides of the limiting groove 12. When the outer tube 1 and the core tube 2 move relative to each other, that is, when the core tube 2 moves along the outer tube 1 toward the inside of the outer tube 1, the baffle 14 contacts the side wall of the limiting groove 12, thereby limiting the relative movement distance of the outer tube 1 and the core tube 2; when the protective cover 17 is pulled back and the inner ring of the protective cover 17 no longer covers the baffle 14, the rubber belt 16 and the protective cover 17 rebound to withdraw one end of the baffle 14 into the socket 13. At this time, the baffle 14 no longer limits the core tube 2, so that the core tube 2 can be easily pulled out from the outer tube 1.

[0021] One end of the outer tube 1 is sleeved with a protective cover 17 threadedly connected, and the inner part of the protective cover 17 is rotatably connected with a turntable 19. A screw 21 is fixed on the surface of the turntable 19. The screw 21 penetrates the flange 3 and the flange 24. The end of the screw 21 is sleeved with a nut 22 threadedly connected. The protective cover 17 is a round tube with an "L"-shaped cross section. The inner wall of the protective cover 17 is provided with a reserved groove 18, and the reserved groove 18 is a circular ring groove. The turntable 19 is a circular ring plate with an "L"-shaped cross section. A retaining ring 20 is sleeved on 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 that of the outer ring surface of the reserved groove 18. A plurality of screw rods 21 are provided on the outer ring diameter of the rotating disk 19. 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 limiting groove 12. A spring 24 is provided between the flange 13 and the flange 24. One end of the spring 24 is fixed to the surface of the flange 3. A spring connecting ring 23 is fixed to the other end of the spring 24. The spring connecting ring 23 is sleeved on the rod body of the screw rod 21. Two screw rods 26 are fixed to one end of the spring connecting ring 23. The screw rods 26 pass through the through holes 25. The through holes 25 are provided on the surface of the flange 4. The ends of the screw rods 26 are sleeved with nut 27 which is screwed.

[0022] When in use, the spring connecting ring 23 and the spring 24 are pre-mounted on the screw 21, at this time, the screw 26 passes through the through hole 25, and the nut 27 is sleeved and threaded on the screw 26. When the protective cover 17 covers and squeezes the baffle 14, the screw 21 passes through the bolt holes 5 on the surfaces of the flange 13 and the flange 24, and the nut 22 is sleeved and threaded on the rod body of the screw 21. At this time, the spring 24 is elastically clamped between the flange 13 and the flange 24. When the core tube 2 moves toward the inside of the outer tube 1, the flange 13 and the flange 24 squeeze the spring 24 to deform, and the rebound force of the spring 24 pushes the flange 13 and the flange 24 to return to the original spacing; it should be noted that when the protective cover 17 rotates, after one end of the screw 21 is inserted into the bolt hole 5, after the protective cover 17 is rotated, the turntable 19 and the protective cover 17 move relative to each other.

[0023] One end of the protective cover 17 is plugged with a protective cover 29, and the protective cover 29 is sleeved and screwed on the tube body of the core tube 2. The inner ring opening of one end of the protective cover 17 is provided with an internal thread 1, and the outer wall of the outer tube 1 is provided with an external thread 1, and the internal thread 1 and the external thread 1 are matched and connected. The other end of the protective cover 17 is provided with a slot 28, and the slot 28 is an annular groove. The protective cover 29 is a round tube with an "L"-shaped cross section. The inner ring opening of one end of the protective cover 29 is provided with an internal thread 2, and the outer wall of the core tube 2 is provided with an external thread 2, and the internal thread 2 and the external thread 2 are matched and connected. The outer ring surface of the slot 28 is provided with a side groove 30. The inner ring surface of the slot 28 is provided with a side groove 21, and the side groove 1 30 and the side groove 2 31 are annular grooves. A sealing ring 1 32 is fixed inside the side groove 1 30, and the sealing ring 1 32 is sleeved on the protective cover 29. The inner ring diameter of the sealing ring 1 32 is larger than the outer diameter of the protective cover 29. The sealing ring 1 32 is clamped between the protective cover 29 and the side groove 1 30 to produce elastic deformation. The sealing ring 2 33 is sleeved and fixed in the side groove 2 31, and the outer diameter of the sealing ring 2 33 is larger than the inner diameter of the protective cover 29. The sealing ring 2 33 is clamped between the protective cover 29 and the side groove 2 31 to produce elastic deformation; the protective cover 1 A connecting ring 34 is fixed at one end of the protective cover 17, and a hand screw 35 is screwed on the surface of the connecting ring 34, and one end of the hand screw 35 is inserted in a slot 1 36, which is provided on the outer wall of the outer tube 1, and the slot 1 36 is an annular groove. A rubber cover 2 37 is fixed at one end of the protective cover 17, and a rubber ring 38 is fixed at one end of the rubber cover 2 37, and the rubber ring 38 is a circular ring structure with a circular cross section. The rubber ring 38 is sleeved in a slot 2 39, which is provided on the outer wall of the outer tube 1, and the slot 2 39 is an annular groove with a circular cross section. The rubber cover 2 37 covers the connecting ring 34; A connecting ring 34 is fixed to one end of the second cover 29, and a hand screw 35 is threaded on the surface of the connecting ring 34, and one end of the hand screw 35 is inserted in a slot 1 36, which is provided on the outer wall of the core tube 2, and is in the form of an annular groove. A rubber cover 27 is fixed to one end of the protective cover 29, and a rubber ring 38 is fixed to one end of the rubber cover 27, and the rubber ring 38 is in the form of an annular structure with a circular cross section. The rubber ring 38 is sleeved in the slot 2 39, which is provided on the outer wall of the core tube 2, and is in the form of an annular groove with a circular cross section. The rubber cover 27 covers the connecting ring 34.

[0024] When in use, after the protective cover 17 squeezes and covers the baffle 14, the rubber cover 2 37 is turned outward, and then the hand screw 35 is screwed and inserted into the card slot 1 36, at this time, the protective cover 17 is braked, and then the rubber cover 2 37 is turned back, and the rubber ring 38 is pushed into the card slot 2 39, at this time, the rubber cover 2 37 covers the connecting ring 34 and the hand screw 35; when the protective cover 29 is adjusted to the point that one end of the protective cover 29 is inserted into the slot 28, and the end of the protective cover 29 and the inner wall of the slot 28 still reserve a distance for pushing in, according to the above operation, the protective cover 29 is braked by the hand screw 35, and then the connecting ring 34 and the hand screw 35 are covered by the rubber cover 2 37; When the core tube 2 moves toward the inside of the outer tube 1, one end of the protective cover 29 moves along the slot 28 toward the inside of the slot 28, and the protective cover 1 17 and the protective cover 29 not only resist the impact of lateral water flow, but also the sealing ring 2 33 and the sealing ring 1 32 are arranged on the inner and outer sides of the protective cover 29 to achieve the sealing of the slot 28 and the plug-in connection of the protective cover 29, thereby improving the sealing of the outer tube 1 and the core tube 2 after connection, and the protective cover 1 17 and the protective cover 29 jointly protect the connection structure on the flange 1 3 and the flange 2 4; the sealing ring 3 40 is fixed on the inner ring surface of the connecting ring 34, and the sealing ring 3 40 improves the sealing between the connecting ring 34 and the outer tube 1 and the core tube 2.

[0025] The process of using the end connection device for underwater pipeline elastic sealing is as follows: The core tube 2 and the outer tube 1 are fixed to the two underwater pipes to be connected respectively. The collar 8 is placed against the end of the core tube 2 to ensure that one end of the rubber cover 7 can be fixed in the embedding groove 6. The core tube 2 is pushed into the outer tube 1, and the collar 8 is pushed up accordingly, and the rubber cover 7 is deformed to fill the gap between the core tube 2 and the outer tube 1. The flange 3 and the flange 2 4 are aligned through the bolt hole 5 to ensure that the screw 21 can pass smoothly. Turn the protective cover 17 so that the turntable 19 drives the screw 21 to pass through the flange 1 3 and the flange 2 4, and then screw the nut 1 22 to fix it. At the same time, ensure that the spring 24 is clamped between the flange 1 3 and the flange 2 4, and the spring connecting ring 23 and the screw 2 26 are fixed through the through hole 25, and the nut 2 27 is screwed. During the advancement of the protective cover 17, the baffle 14 is squeezed into the socket 13 through the inclined surface, and the baffle 14 pulls the rubber belt 16 to deform. After one end of the baffle 14 extends into the limiting groove 12, ensure that the baffle 14 is at an equal distance from the side walls on both sides of the limiting groove 12. Sleeve the protective cover 29 on the core tube 2 and screw it into place. Adjust the position of the protective cover 29 so that one end of it can be smoothly inserted into the slot 28 of the protective cover 17. Ensure that the sealing ring 1 32 and the sealing ring 2 33 are clamped on the inside and outside sides of the protective cover 29 and the slot 28 respectively. Turn the rubber cover 2 37 outward, screw the hand screw 35 and insert it into the slot 1 36 to brake the protective cover 17 and the protective cover 29. Turn the rubber cover 2 37 back, push the rubber ring 38 into the slot 2 39, and cover the connecting ring 34 and the hand screw 35. Check whether the sealing components such as the rubber cover 1 7, the sealing ring 1 32, the sealing ring 2 33 and the rubber ring 38 are installed in place to ensure that there is no leakage. A pressure test can be performed to verify the sealing performance of the connecting device. Try to move the core tube 2 relative to the outer tube 1 to ensure that the limiting effect of the baffle 14 in the limit groove 12 is effective. Observe whether the rebound force of the spring 24 can restore the flange 3 and the flange 2 4 to their original spacing after being squeezed. Confirm that all connectors and fasteners are correctly installed and tightened. Check whether the protective cover 17 and the protective cover 29 can effectively resist the impact of lateral water flow. After the underwater pipe connection device is installed, it can be used normally. Regularly check the sealing and stability of the connection device to ensure that it is in good working condition. Clean and lubricate the connection device regularly to extend its service life. If the sealing component is found to be aged or damaged, it should be replaced in time. Regularly check whether the fasteners are loose, and tighten them in time if they are loose.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 inside of the protective cover is rotatably connected with a turntable, the surface of the turntable is fixed with a screw rod, the screw rod passes through a flange plate and a 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 inserted with a protective cover, and the protective cover is sleeved with a screw on the tube body of the core tube.

2. The underwater pipeline elastic sealing end connection device according to claim 1, characterized in that: The inner ring opening of the flange plate is provided with an embedding groove, which is an annular groove. One end of the rubber cover is fixed in the embedding groove. The sleeve ring is a circular ring plate with an "L"-shaped cross-section. The outer ring diameter of the sleeve ring is equal to the inner ring diameter of the outer tube. A plurality of through holes are provided on the surface of the sleeve ring. A plug rod is inserted into the inside of the through holes. The length of the plug rod is greater than the plate thickness of the sleeve ring. A rubber clamp is fixed on one end of the plug rod. The rubber clamp is a spherical structure. 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 limiting groove is an annular groove, and a socket is provided on the outer wall of the outer tube. There are multiple sockets, and the multiple sockets are distributed in a circle around the outer tube. The baffle is an arc plate, and the baffle and the socket correspond one to one. The baffle is inserted in the socket, and the height of the baffle is greater than the height of the socket. An inclined surface is provided on one side of the baffle. After the protective cover pushes the baffle into the socket along the inclined surface, one end of the baffle is inserted into the limiting groove. After the rubber cover is stretched and deformed by the baffle, it is clamped between the baffle and the limiting groove. One end of the rubber cover is clamped between the core tube and the outer tube to produce elastic deformation.

4. The underwater pipeline elastic sealing end connection device according to claim 3, characterized in that: The baffle plate has a through hole on its surface, a rubber band is fixed on the top surface of the through hole, and two ends of the rubber band are fixed on two parallel side walls of the socket. When the protective cover pushes the baffle plate, the baffle plate pulls the rubber band to produce elastic deformation.

5. 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.

6. 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.

7. 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.

8. The underwater pipeline elastic sealing end connection device according to claim 7, 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.

9. 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.

10. 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.

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