A variable diameter underwater pipeline end plugging device

Abstract

The present invention discloses a variable diameter underwater pipeline end plugger, which belongs to the technical field of pipeline pluggers, and includes a pipeline body, the outer side of the pipeline body is sleeved with a positioning ring, the inner side of the support seat is movably mounted with a moving wheel, and the surface of the moving wheel is in contact with the surface of the pipeline body; it also includes: a fixed plate, fixed to the side of the positioning ring, the interior of the fixed plate is provided with a locking mechanism; a fixed rod, one end of which is fixed to the side of the fixed plate away from the positioning ring, and the other end of the fixed rod is connected to the plugging mechanism through a fixed pipe. The variable diameter underwater pipeline end plugger can plug pipeline ends with different inner diameters without replacing different pluggers or filling different amounts of gas, and the operation is more convenient, and the stability of the pipeline plugger sleeved on the outside of the pipeline can be ensured, so as to avoid the displacement of the plugger position during the construction process and affect the plugging effect.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline plugging devices, in particular to a variable diameter end plugging device for underwater pipelines. Background Art

[0002] The pipe plugger is a tool used to prevent water seepage in the target pipe section. The pipe plugger is mainly used for drainage, sewage pipe repair, water-tight test leakage detection, etc. It can quickly block the water flow at different pipe diameters, different planes and different positions to achieve the purpose of rapid construction. At present, most of the pipe pluggers on the market are made of rubber material, which is filled inside the pipe by inflation to seal. For example, a pipe plugger with publication number CN111810762B includes a support rod, an expansion ring and a sealing cover. The right end of the support rod is provided with a fixed ring, and the middle part of the support rod is provided with a sliding ring; the expansion ring includes a rubber ring along the The first arc-shaped member and the second arc-shaped member are alternately distributed in the circumferential direction. The first arc-shaped member is provided with a guide part. The side surfaces corresponding to the guide part and the two ends of the first arc-shaped member are guide surfaces. The guide surface is provided with a slide groove. The two side walls of the slide groove are provided with guide holes. The guide holes on the adjacent first arc-shaped members form an eight-shaped shape. The second arc-shaped member is provided with a support ear. The support ear is hinged to the fixed ring and the sliding ring through the first connecting rod and the second connecting rod. The two ends of the second arc-shaped member are respectively provided with sliders in the slide groove. The two sides of the slider are respectively provided with guide columns in the guide holes. The sealing cover is sleeved on the expansion ring from right to left and is fixedly connected to the first arc-shaped member. It has the advantages of simple structure, convenient operation, reliable sealing, and strong adaptability. It does not require equal-diameter holes to be opened in the pipeline, which improves the working efficiency.

[0003] For example, a pipeline port plugger with the publication number CN101387365B includes: a transmission screw having a pivot end, a threaded section and an operating end, and the operating end is provided with a baffle; a pressure head pivotally connected to the pivot end of the transmission screw, a support member is fixed on the inner end surface of the pressure head, and the pivot end passes through the support end plate and is located inside the support member; an actuator disk having a threaded hole, and the threaded hole is matched on the threaded section of the transmission screw; an extrusion bowl slidably arranged between the pressure head and the actuator disk, and the extrusion bowl has an inclined sliding cone surface and an extrusion end surface; at least two locking sliders, which are connected to the actuator disk, and the lower surface of the locking slider axially slides and fits on the sliding cone surface of the extrusion bowl, and the locking slider is driven by the actuator disk to rise along the sliding cone surface and is locked in a radially expanded state; a spacer ring is arranged between the pressure head and the actuator disk. However, the above-mentioned pipeline plugger still has the following disadvantages during actual use:

[0004] 1. Most traditional pipe pluggers can only plug pipes with the same inner diameter. Since the media transmitted by underwater pipes are different, their inner diameters are also different. When it is necessary to plug pipe ends with different inner diameters, different pluggers need to be used, or different amounts of gas need to be filled, which is not convenient to operate;

[0005] 2. Some pipe pluggers are installed on the outside of the pipe and then plug the pipe through a plugging structure. This may easily lead to an unstable connection between the plugger and the pipe, which may cause the position of the plugger to shift during the construction process, thus affecting the plugging effect.

[0006] In view of the above problems, it is urgent to carry out innovative design based on the original pipeline plugger. Summary of the invention

[0007] The purpose of the present invention is to provide a variable diameter end plugger for underwater pipelines to solve the problem that when traditional pipeline pluggers need to plug pipeline ends with different inner diameters, different pluggers need to be used, or different amounts of gas need to be filled, and the connection between the plugger and the pipeline is unstable, which will cause the position of the plugger to shift during construction, thereby affecting the plugging effect.

[0008] To achieve the above object, the present invention provides the following technical solution: a variable diameter underwater pipeline end plugging device, comprising a pipeline body, a positioning ring is sleeved on the outer side of the pipeline body, and a support seat is fixed on the inner wall of the positioning ring, a moving wheel is movably installed on the inner side of the support seat, and the surface of the moving wheel is in contact with the surface of the pipeline body;

[0009] It also includes: a fixing plate fixed to the side of the positioning ring, a locking mechanism is arranged inside the fixing plate, and the locking mechanism is used for positioning and locking between the positioning ring and the pipeline body;

[0010] A fixing rod, one end of which is fixed to the side of the fixing plate away from the positioning ring, and the other end of the fixing rod is connected to the sealing mechanism through a fixing tube, and the end of the fixing tube away from the fixing rod is fixedly connected to the sealing mechanism, and the sealing mechanism is arranged on the inner side of the end of the pipeline body.

[0011] Preferably, the locking mechanism includes a movable block that passes through the inside of the fixed plate, and the movable block and the fixed plate are slidably connected, and a fixed block is provided at one end of the movable block, and the fixed block and the limiting hole are snap-fittedly connected. When the connecting ring is pulled, the movable blocks distributed at equal angles can be driven to slide in the fixed plate.

[0012] Preferably, the limiting holes are opened at equal angles on the moving wheel, and the moving wheel and the fixed plate are both arranged at equal angles on the positioning ring. A connecting ring is fixed to the other end of the movable block, and the movable blocks at equal angles are fixedly connected by the connecting ring. After the movable block moves, it can drive the fixed block to separate from the limiting hole, thereby realizing the movement of the positioning ring on the outside of the pipeline body through the moving wheel.

[0013] Preferably, a guide groove is provided inside the movable block, and the inner top surface of the guide groove is a sloped structure. A movable rod passes through one end of the fixed plate close to the pipe body, and the movable rod and the fixed plate are slidably connected. When the movable block moves, it can contact the movable rod through the guide groove of its slope, thereby realizing the sliding of the movable rod on the fixed plate.

[0014] Preferably, a spring is wound around the outer side of the movable rod to reset it, and the top of the movable rod is in fit contact with the inclined surface of the guide groove, and a limiting block is fixed to one end of the movable rod close to the pipe body, and the limiting block is made of rubber. At the same time, the limiting block fits tightly with the outer wall of the pipe body, and the positioning ring can be locked when the movable rod drives the limiting block to contact the pipe body, and the positioning ring can be moved conveniently after the limiting block is separated from the pipe body.

[0015] Preferably, the sealing mechanism includes a sealing plate fixed on the fixed pipe, and a sealing head is fixed on the side of the sealing plate away from the fixed pipe, and a connecting rod is provided at the end of the fixed pipe away from the sealing plate, and the connecting rod is snap-fitted to the end of the fixed rod, and the outer diameter of the sealing plate is larger than the outer diameter of the pipe body, and the end of the pipe body can be sealed by the sealing head, and the sealing diameter can be adaptively changed according to the different inner diameters of the pipe.

[0016] Preferably, the end of the plugging head close to the pipe body is a cone, and the other end of the plugging head is a cylinder, and a fixed cavity is opened inside the plugging head, and a piston plate is arranged inside the fixed cavity. When the piston plate moves in the fixed cavity, it can drive the gas in the fixed cavity to be transmitted to the airbag through the gas valve.

[0017] Preferably, the edge of the piston plate slides in contact with the inner wall of the fixed cavity, and the side of the piston plate is elastically connected to the inner wall of the fixed cavity through an elastic member, and the side of the piston plate is fixedly connected to one end of the guide rope, while the other end of the guide rope slides through the interior of the sealing plate, the fixed tube and the connecting rod and is fixedly connected to the fixed rod. When the airbag is inflated, the sealing head can seal the end of a pipe with a larger inner diameter.

[0018] Preferably, an air supply valve is provided at the edge of the plugging head, and the fixed cavity is interconnected through the air supply valve and the interior of the airbag, and the airbag is adhered to the outer side of the cylindrical body of the plugging head. After the positioning ring moves continuously, it drives the fixing rod to separate from the fixing tube, and then pulls the piston plate to move through the guide rope.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the variable diameter underwater pipeline end plugger can plug pipeline ends with different inner diameters without replacing different pluggers or filling different amounts of gas, and the operation is more convenient. It can also ensure the stability of the pipeline plugger sleeved on the outside of the pipeline, and avoid the plugger position deviation during the construction process to affect the plugging effect. The specific contents are as follows:

[0020] 1. Pull the connecting ring to drive multiple movable blocks to slide on the fixed plate. On the one hand, the fixed block is separated from the limiting hole to release the limiting of the moving wheel. On the other hand, after the movable block moves, the push of the guide groove on the movable rod is released. In this way, the limiting block can be driven away from the pipeline body through the resilience of the spring and no longer resist the outer wall of the pipeline body, so that the positioning ring can be moved outside the pipeline body through the moving wheel to adjust the position of the blocking mechanism;

[0021] Furthermore, the connecting ring is pushed in the reverse direction to drive the movable block to slide in the reverse direction, driving the fixed block to contact the limiting holes at different angles, thereby locking the position of the moving wheel. Then, the movable rod is pushed by the guide groove to drive the limiting block to contact the pipeline body, thereby further ensuring the stability of the positioning ring outside the pipeline body and preventing the position from easily shifting during the construction process to affect the plugging effect.

[0022] 2. After the plugging plate is fitted with the end of the pipeline body, the position of the plugging head is restricted and no longer moves, while the positioning ring can continue to move on the pipeline body, and then drive the fixing rod to separate from the connecting rod. When the positioning ring moves, it can pull the guide rope to extend and drive the piston plate to move in the fixed cavity. The gas in the fixed cavity can be transmitted to the air bag through the gas valve through the extrusion of the piston plate. The expanded air bag is closely attached to the inner wall of the pipeline body, so as to achieve the plugging of a larger inner diameter;

[0023] Furthermore, when the sealing mechanism needs to be removed, the positioning ring is moved in the opposite direction to release the pull on the guide rope. In this way, the piston plate draws out the gas in the airbag through the resilience of the spring, leaving space between the sealing head and the inner wall of the pipe body. The fixing rod is then driven to re-engage with the connecting rod, and the entire sealing mechanism can be removed from the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the pipeline body structure of the present invention;

[0026] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0027] Figure 4It is a schematic diagram of the connection structure of the movable block and the connection ring of the present invention;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixing plate of the present invention;

[0029] Figure 6 This is a schematic diagram of the positioning ring structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the plugging head structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of the plugging head of the present invention;

[0032] Fig. 9 It is a schematic diagram of the cross-sectional structure of the fixed pipe of the present invention.

[0033] In the figure: 1. pipeline body; 2. positioning ring; 3. support seat; 4. moving wheel; 41. limiting hole; 5. fixing plate; 6. movable block; 61. guide groove; 7. connecting ring; 8. fixing block; 9. movable rod; 10. limiting block; 11. fixing rod; 12. connecting rod; 13. fixing pipe; 14. sealing plate; 15. sealing head; 16. fixing chamber; 17. piston plate; 18. gas delivery valve; 19. air bag; 20. guide rope. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on 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.

[0035] See also Figure 1-Figure 9 , the present invention provides the following technical solutions:

[0036] Embodiment 1: In order to solve the problems existing in the prior art, this embodiment adopts the following technical scheme: a variable diameter end plugger for underwater pipelines, comprising a pipeline body 1, a positioning ring 2 is sleeved on the outer side of the pipeline body 1, and a support seat 3 is fixed to the inner wall of the positioning ring 2, a moving wheel 4 is movably installed on the inner side of the support seat 3, and the surface of the moving wheel 4 is in contact with the surface of the pipeline body 1; it also includes: a fixing plate 5, fixed to the side of the positioning ring 2, a locking mechanism is arranged inside the fixing plate 5, and the locking mechanism is used for positioning and locking between the positioning ring 2 and the pipeline body 1; a fixing rod 11, one end of which is fixed to the side of the fixing plate 5 away from the positioning ring 2, the other end of the fixing rod 11 is connected to the plugging mechanism through a fixing pipe 13, and the end of the fixing pipe 13 away from the fixing rod 11 is fixedly connected to the plugging mechanism, and the plugging mechanism is arranged on the inner side of the end of the pipeline body 1.

[0037] The existing pipeline plugger is set on the outside of the pipeline, and then the pipeline is plugged through the plugging structure, which is prone to unstable connection between the plugger and the pipeline. During the construction process, the position of the plugger will be offset, thereby affecting the plugging effect. Figure 1-Figure 6 As shown, the locking mechanism includes a movable block 6 that passes through the interior of the fixed plate 5, and the movable block 6 and the fixed plate 5 are slidably connected, and a fixed block 8 is provided at one end of the movable block 6, and the fixed block 8 and the limiting hole 41 are snap-fitted; the limiting hole 41 is opened at equal angles on the moving wheel 4, and the moving wheel 4 and the fixed plate 5 are both set at equal angles on the positioning ring 2, a connecting ring 7 is fixed to the other end of the movable block 6, and the movable blocks 6 of equal angles are fixedly connected by the connecting ring 7; a guide groove 61 is opened inside the movable block 6, and the inner top surface of the guide groove 61 is an inclined structure, a movable rod 9 is passed through one end of the fixed plate 5 close to the pipe body 1, and the movable rod 9 and the fixed plate 5 are slidably connected; a spring is wound around the outer side of the movable rod 9 to reset it, and the top of the movable rod 9 is in contact with the inclined surface of the guide groove 61, and a limiting block 10 is fixed to one end of the movable rod 9 close to the pipe body 1, and the limiting block 10 is made of rubber, and the limiting block 10 is tightly fitted to the outer wall of the pipe body 1.

[0038] The plugging mechanism achieves plugging by sleeve-mounting the positioning ring 2 on the outer side of the pipeline body 1. When the inner diameter of the pipeline body 1 is different, it is necessary to adjust the sleeve position of the positioning ring 2 so that the plugging mechanism can adapt to the inner diameter of the pipeline body 1. Therefore, the connecting ring 7 is pulled to drive the movable blocks 6 distributed at equal angles to slide on the fixed plate 5. On the one hand, it drives the fixed block 8 to separate from the limiting hole 41 and releases the limit on the moving wheel 4. On the other hand, after the movable block 6 moves, the push of the guide groove 61 on the movable rod 9 is released. In this way, the limit block 10 can be driven away from the pipeline body 1 by the resilience of the spring and no longer interfere with the outer wall of the pipeline body 1. Then, the positioning ring 2 can be pushed to move on the pipeline body 1. The rolling of the moving wheel 4 can improve the smoothness of the movement of the positioning ring 2, thereby driving the plugging head 15. The different outer diameters of the pipe body 1 are in contact with the end of the pipe body 1. When the outer wall of the sealing head 15 conflicts with the inner wall of the pipe body 1, blocking can be achieved. After the position adjustment is completed, the connecting ring 7 is pushed in the reverse direction to drive the movable block 6 to slide in the reverse direction, and the fixed block 8 is driven to contact the limiting holes 41 at different angles to lock the position of the movable wheel 4 to prevent the positioning ring 2 from moving easily. Then, the movable rod 9 is pushed by the guide groove 61 to drive the limiting block 10 to approach the pipe body 1 and fit with its outer wall. Since the movable block 6 has resistance when sliding on the inner side of the fixed plate 5, the stability of the position of the movable block 6 after movement can be guaranteed. Through the conflict between the limiting block 10 and the pipe body 1, the stability of the positioning ring 2 outside the pipe body 1 can be further guaranteed, preventing the position from easily shifting during construction and affecting the blocking effect.

[0039] Embodiment 2: Most of the existing pipe pluggers can only plug pipes with the same inner diameter. Since the medium transmitted by underwater pipes is different, their inner diameters are also different. When it is necessary to plug the ends of pipes with different inner diameters, different pluggers need to be used, or different amounts of gas need to be filled. The operation is not convenient enough. Therefore, this embodiment adopts the following technical solutions, such as Figure 3 and Figure 7-Figure 9As shown, the plugging mechanism includes a plugging plate 14 fixed on the fixed pipe 13, and a plugging head 15 is fixed on the side of the plugging plate 14 away from the fixed pipe 13, and a connecting rod 12 is provided at the end of the fixed pipe 13 away from the plugging plate 14, and the connecting rod 12 is snap-fitted at the end of the fixed rod 11, and the outer diameter of the plugging plate 14 is larger than the outer diameter of the pipeline body 1; the end of the plugging head 15 close to the pipeline body 1 is a truncated cone, and the other end of the plugging head 15 is a cylinder, and a fixed cavity 16 is opened inside the plugging head 15, and a piston plate is provided inside the fixed cavity 16. 17; the edge of the piston plate 17 fits and slides with the inner wall of the fixed cavity 16, and the side of the piston plate 17 is elastically connected to the inner wall of the fixed cavity 16 through an elastic member, and the side of the piston plate 17 is fixedly connected to one end of the guide rope 20, and at the same time, the other end of the guide rope 20 slides through the interior of the blocking plate 14, the fixed tube 13 and the connecting rod 12 and is fixedly connected to the fixed rod 11; an air supply valve 18 is provided at the edge of the blocking head 15, and the fixed cavity 16 is communicated with the interior of the air bag 19 through the air supply valve 18, and the air bag 19 is adhered to the outer side of the cylindrical body of the blocking head 15.

[0040] When the inner diameter of the pipeline body 1 is larger than the maximum outer diameter of the plugging head 15, the positioning ring 2 can be continuously pushed to move outside the pipeline body 1, and then the plugging head 15 is driven to be inside the pipeline body 1, and the plugging plate 14 is driven to fit with the end of the pipeline body 1, so that the position of the plugging head 15 is restricted and no longer moves, while the positioning ring 2 can continue to move on the pipeline body 1, and then the fixing rod 11 is driven to separate from the connecting rod 12. At this time, the positions of the fixing tube 13 and the plugging plate 14 remain unchanged. When the positioning ring 2 moves, the guide rope 20 can be pulled to extend, and the piston plate 17 can be driven to move in the fixed cavity 16. The gas in the fixed cavity 16 can be transmitted through the gas valve 18 through the squeezing of the piston plate 17. To the airbag 19, and drive the airbag 19 to expand. The expanded airbag 19 can be tightly attached to the inner wall of the pipe body 1, so as to achieve a larger inner diameter blockage, and it is convenient to adjust the blocking diameter of the blocking mechanism according to the different inner diameters of the pipe body 1. After the blocking is completed, the position of the positioning ring 2 is limited by the locking mechanism. When the blocking mechanism needs to be removed, the positioning ring 2 is moved in the opposite direction to release the pulling on the guide rope 20. In this way, the piston plate 17 draws out the gas in the airbag 19 through the resilience of the spring, so that there is space between the blocking head 15 and the inner wall of the pipe body 1, and then drives the fixing rod 11 to re-engage with the connecting rod 12, so that the blocking mechanism can be removed from the pipe body 1 as a whole.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A variable diameter underwater pipeline end plugging device, comprising a pipeline body (1), a positioning ring (2) is sleeved on the outer side of the pipeline body (1), a support seat (3) is fixed on the inner wall of the positioning ring (2), a moving wheel (4) is movably mounted on the inner side of the support seat (3), and the surface of the moving wheel (4) is in close contact with the surface of the pipeline body (1); It is characterized in that Also includes: A fixing plate (5) is fixed to the side of the positioning ring (2), a locking mechanism is provided inside the fixing plate (5), and the locking mechanism is used for positioning and locking between the positioning ring (2) and the pipeline body (1); A fixing rod (11), one end of which is fixed to a side of the fixing plate (5) away from the positioning ring (2), the other end of the fixing rod (11) being connected to a blocking mechanism via a fixing tube (13), and the end of the fixing tube (13) away from the fixing rod (11) being fixedly connected to the blocking mechanism, and the blocking mechanism being arranged on the inner side of the end of the pipeline body (1); The blocking mechanism comprises a blocking plate (14) fixed on a fixed pipe (13), a blocking head (15) being fixed on a side of the blocking plate (14) away from the fixed pipe (13), and a connecting rod (12) being provided at one end of the fixed pipe (13) away from the blocking plate (14), the connecting rod (12) being snap-fitted to an end of the fixed rod (11), and an outer diameter of the blocking plate (14) being greater than an outer diameter of the pipe body (1); One end of the plugging head (15) close to the pipeline body (1) is a truncated cone, and the other end of the plugging head (15) is a cylinder. A fixed cavity (16) is provided inside the plugging head (15), and a piston plate (17) is provided inside the fixed cavity (16). The edge of the piston plate (17) slides in contact with the inner wall of the fixed cavity (16), and the side of the piston plate (17) is elastically connected to the inner wall of the fixed cavity (16) via a spring, and the side of the piston plate (17) is fixedly connected to one end of the guide rope (20), while the other end of the guide rope (20) slides through the inside of the blocking plate (14), the fixed tube (13) and the connecting rod (12) and is fixedly connected to the fixed rod (11); An air delivery valve (18) is provided at the edge of the plugging head (15), and the fixed cavity (16) is connected to the inside of the air bag (19) through the air delivery valve (18), and the air bag (19) is adhered to the outside of the cylindrical body of the plugging head (15).

2. The variable diameter underwater pipeline end plugging device according to claim 1 is characterized in that: The locking mechanism comprises a movable block (6) penetrating the interior of the fixed plate (5), the movable block (6) and the fixed plate (5) are slidably connected, and a fixed block (8) is provided at one end of the movable block (6), and the fixed block (8) and the limiting hole (41) are snap-fittedly connected.

3. The variable diameter underwater pipeline end plugging device according to claim 2 is characterized in that: The limiting holes (41) are formed at equal angles on the moving wheel (4), and the moving wheel (4) and the fixing plate (5) are both arranged at equal angles on the positioning ring (2). A connecting ring (7) is fixed to the other end of the movable block (6), and the movable blocks (6) at equal angles are fixedly connected via the connecting ring (7).

4. The variable diameter underwater pipeline end plugging device according to claim 3 is characterized in that: A guide groove (61) is provided inside the movable block (6), and the inner top surface of the guide groove (61) is an inclined structure. A movable rod (9) penetrates through one end of the fixed plate (5) close to the pipeline body (1), and the movable rod (9) and the fixed plate (5) are slidably connected.

5. The variable diameter underwater pipeline end plugging device according to claim 4 is characterized in that: A spring for returning the movable rod (9) is wound around the outer side of the movable rod (9), and the top of the movable rod (9) is in close contact with the inclined surface of the guide groove (61). A limit block (10) is fixed to one end of the movable rod (9) close to the pipe body (1), and the limit block (10) is made of rubber. At the same time, the limit block (10) is in close contact with the outer wall of the pipe body (1).

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