High pressure resistant rotary compensator for pipes

Abstract

The application belongs to the technical field of rotary compensators, and specifically discloses a high-pressure-resistant rotary compensator for pipelines, which comprises an outer cylinder, one end of the outer cylinder is provided with an inner cylinder, one end of the outer cylinder close to the inner cylinder is fixedly connected with an inner sleeve and a first blocking ring, the inner sleeve abuts against the inner wall of the inner cylinder, and the outer wall of one side of the first blocking ring close to the inner cylinder is fixedly connected with a connecting sleeve; a compensation assembly is used for disassembling and assembling the rotary compensator and ensuring the sealing effect of the rotary compensator, and the compensation assembly is connected with the outer cylinder, the inner cylinder, the first blocking ring and a sealing cover plate. Through the compensation assembly, the rotary compensator can be quickly disassembled and assembled, so that the rotary compensator components can be overhauled and replaced; after the sealing filler is pushed to be displaced due to wear, the pressure on the sealing filler can be readjusted, the rotary compensator can be sealed by the sealing filler under pressure, the rotary compensator can be protected, the influence of the external environment on the rotary compensator is reduced, and the service life of the rotary compensator is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of rotary compensator technology, and specifically relates to a high-pressure resistant rotary compensator for pipelines. Background Technology

[0002] A rotary compensator is a device used in pipeline systems to absorb displacement caused by thermal expansion and contraction, vibration, or installation errors. It compensates for pipeline deformation through the relative rotational movement of its internal structure, ensuring the safe and stable operation of the system. The core principle is to absorb displacement by utilizing the rotation of the core tube in the sealed structure. It is widely used in fields such as thermal power, petroleum, chemical industry, and power.

[0003] While existing high-pressure rotary compensators rely on springs to press the sealing material for sealing, the pressure exerted by the springs decreases as the sealing material wears down, affecting the sealing effect and leading to internal pipeline leakage. Furthermore, the lack of external protective structures allows the springs and other components to be susceptible to environmental influences, causing changes in spring force and impacting the sealing performance. Additionally, disassembly and maintenance require manual removal of bolts and nuts, followed by reattaching them. This manual process is time-consuming, labor-intensive, and compromises the torque and pressure applied to the sealing material. Therefore, designing a high-pressure rotary compensator for pipelines is a crucial problem that needs to be addressed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-pressure resistant rotary compensator for pipelines.

[0005] To achieve the above objectives, the present invention provides a high-pressure resistant rotary compensator for pipelines, comprising an outer cylinder, an inner cylinder at one end of the outer cylinder, an inner sleeve and a first retaining ring fixedly connected to the end of the outer cylinder near the inner cylinder, the inner sleeve abutting against the inner wall of the inner cylinder, a connecting sleeve fixedly connected to the outer wall of the first retaining ring near the inner cylinder, and a sealing filler and a sealing cover plate inserted between the connecting sleeve and the inner cylinder, the sealing filler abutting against one side of the first retaining ring; The compensation component is used to disassemble and assemble the rotary compensator and ensure the sealing effect of the rotary compensator. The compensation component is connected to the outer cylinder, inner cylinder, first retaining ring and sealing cover plate.

[0006] The compensation assembly allows workers to easily disassemble and assemble the rotary compensator, facilitating the inspection and replacement of its components. It also allows for adjustment of the pressure on the sealing packing after wear and displacement, ensuring the packing maintains pressure to seal the rotary compensator and preventing pressure loss that could affect the seal. Furthermore, it protects the rotary compensator from external influences, thus extending its service life.

[0007] In the above technical solution, the compensation component further includes a second retaining ring sleeved on the outer wall of the inner cylinder. The second retaining ring is disposed on the side of the sealing cover plate near the inner cylinder. A plurality of first springs are provided between the sealing cover plate and the second retaining ring in a circumferentially equidistant manner. Bolts are inserted into the interior of each of the plurality of first springs. The plurality of bolts are inserted into the interior of the second retaining ring, the sealing cover plate and the first retaining ring. Nuts are threadedly connected to the outer wall of the end of each of the plurality of bolts near the outer cylinder.

[0008] In the above technical solution, further, multiple mounting pieces are fixedly installed on the outer wall of the inner cylinder in a circumferentially equidistant manner, a protective shell is sleeved on the outer wall of the outer cylinder and the inner cylinder, the mounting pieces are inserted into the inside of the protective shell, a limiting surface is opened inside the protective shell, and one side of the bolt head is in contact with the inner wall of the protective shell.

[0009] In the above technical solution, the protective shell is further provided with a connector at one end near the outer cylinder. Multiple locking blocks are fixedly connected to the end of the connector near the protective shell. The protective shell has a slot that matches the number and size of the locking blocks. The locking blocks are engaged inside the slot. A rotating plate is rotatably connected to the end of the connector away from the protective shell. The connector and the rotating plate are sleeved on the outer wall of the outer cylinder.

[0010] In the above technical solution, a limiting component is fixedly installed on one side of the rotating plate, and a support plate is slidably connected inside the limiting component. A plurality of second springs are fixedly installed on one side of the support plate, and an arc-shaped rack is fixedly installed on the end of the plurality of second springs away from the support plate. The arc-shaped rack is slidably connected inside the limiting component.

[0011] In the above technical solution, further, multiple limiting rings are fixedly installed in a circumferentially equidistant array inside the connector, and gear sleeves are rotatably connected inside each of the multiple limiting rings. The number of gear sleeves is the same as the number of nuts, and the nuts are inserted into the inside of the gear sleeves. One of the gear sleeves meshes with an arc-shaped rack.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The compensation components facilitate the disassembly and assembly of the rotary compensator by staff, enabling the inspection and replacement of its components. They also allow for the readjustment of the pressure on the sealing packing after wear and displacement, ensuring the packing maintains pressure to seal the compensator and preventing pressure loss that could compromise the seal. Furthermore, the compensator is protected from external influences, thus extending its service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure proposed in this invention; Figure 2 This is a cross-sectional view of the inner cylinder proposed in this invention; Figure 3 The present invention proposes Figure 2 Enlarged view of the A-section structure; Figure 4 This is a first-view structural cross-sectional view of the compensation component proposed in this invention; Figure 5 This is a cross-sectional view of the compensation component structure proposed in this invention from a second perspective. Figure 6 This is an enlarged view of a partial structure of the compensation component proposed in this invention.

[0014] In the diagram: 1. Outer cylinder; 2. Inner cylinder; 3. Inner sleeve; 4. First retaining ring; 5. Connecting sleeve; 6. Sealing packing; 7. Sealing cover plate; 8. Second retaining ring; 9. Bolt; 10. Nut; 11. First spring; 12. Mounting plate; 13. Protective shell; 14. Limiting surface; 15. Connecting piece; 16. Locking block; 17. Locking groove; 18. Rotating plate; 19. Limiting piece; 20. Support plate; 21. Second spring; 22. Arc-shaped rack; 23. Threaded knob; 25. Limiting ring; 26. Gear sleeve; 27. Connecting rod; 28. Rotating rod; 29. ​​Locking piece; 30. Snap ring. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] like Figures 1 to 6 The high-pressure resistant rotary compensator for pipelines shown includes an outer cylinder 1. The outer cylinder 1 has an inner cylinder 2 at one end. An inner sleeve 3 and a first retaining ring 4 are fixedly connected to the end of the outer cylinder 1 near the inner cylinder 2. The inner sleeve 3 abuts against the inner wall of the inner cylinder 2. A connecting sleeve 5 is fixedly connected to the outer wall of the first retaining ring 4 near the inner cylinder 2. A sealing filler 6 and a sealing cover plate 7 are inserted between the connecting sleeve 5 and the inner cylinder 2. The sealing filler 6 abuts against one side of the first retaining ring 4. The outer cylinder 1 is connected to the inner cylinder 2 through the inner sleeve 3, the first retaining ring 4 and the connecting sleeve 5, which can increase the sealing area between the outer cylinder 1 and the inner cylinder 2, thereby improving the sealing effect between the outer cylinder 1 and the inner cylinder 2. When the outer cylinder 1 and the inner cylinder 2 are subjected to displacement caused by thermal expansion and contraction, vibration or installation error of the pipeline, the outer cylinder 1 and the inner cylinder 2 can rotate relative to each other to compensate for the displacement and ensure the stability and safety of the pipeline during operation. Among them, by setting the sealing packing 6, the connection between the outer cylinder 1 and the inner cylinder 2 can be sealed to prevent leakage after the outer cylinder 1 and the inner cylinder 2 rotate. The compensation component is used to disassemble and assemble the rotary compensator and ensure its sealing effect. The compensation component is connected to the outer cylinder 1, the inner cylinder 2, the first retaining ring 4, and the sealing cover plate 7.

[0017] The compensation component includes a second retaining ring 8 sleeved on the outer wall of the inner cylinder 2. The second retaining ring 8 is located on the side of the sealing cover plate 7 near the inner cylinder 2. Multiple first springs 11 are provided in a circumferentially equidistant manner between the sealing cover plate 7 and the second retaining ring 8. Bolts 9 are inserted into the interior of each of the multiple first springs 11. Multiple bolts 9 are inserted into the interior of the second retaining ring 8, the sealing cover plate 7 and the first retaining ring 4. Nuts 10 are threadedly connected to the outer wall of the end of each of the multiple bolts 9 near the outer cylinder 1. Among them, by setting the first spring 11, pressure can be continuously applied to the sealing packing 6 through the sealing cover plate 7, so that the sealing packing 6 seals the part where the outer cylinder 1 is connected to the inner cylinder 2 through the inner sleeve 3, the inner sleeve 3 and the connecting sleeve 5, so as to prevent the liquid inside the outer cylinder 1 and the inner cylinder 2 from leaking. Multiple mounting pieces 12 are fixedly installed on the outer wall of the inner cylinder 2 in a circumferentially equidistant manner. A protective shell 13 is sleeved on the outer walls of the outer cylinder 1 and the inner cylinder 2. The mounting pieces 12 are inserted into the inside of the protective shell 13. A limiting surface 14 is formed inside the protective shell 13. One side of the bolt head of the bolt 9 is in contact with the inner wall of the protective shell 13. A connector 15 is provided at the end of the protective shell 13 near the outer cylinder 1. Multiple locking blocks 16 are fixedly connected to the end of the connector 15 near the protective shell 13. The protective shell 13 has a slot 17 that matches the number and size of the locking blocks 16. The locking blocks 16 are locked into the inside of the slot 17. A rotating plate 18 is rotatably connected to the end of the connector 15 away from the protective shell 13. The connector 15 and the rotating plate 18 are sleeved on the outer wall of the outer cylinder 1. A limiting piece 19 is fixedly installed on one side of the rotating plate 18. A support plate 20 is slidably connected inside the limiting piece 19. Multiple second springs 21 are fixedly installed on one side of the support plate 20. The multiple second springs 21 are located away from the support plate 20. An arc-shaped rack 22 is fixedly installed at the end of the support plate 20, which is slidably connected to the inside of the limiting member 19. A threaded knob 23 is rotatably connected to the side of the support plate 20 away from the second spring 21. The threaded knob 23 is threadedly connected to the inside of the limiting member 19. Multiple limiting rings 25 are fixedly installed in a circumferentially equidistant array inside the connecting member 15. Gear sleeves 26 are rotatably connected inside each of the multiple limiting rings 25. The number of gear sleeves 26 is the same as the number of nuts 10. Nuts 10 are inserted into the inside of gear sleeves 26. One of the gear sleeves 26 meshes with the arc-shaped rack 22. Two connecting rods 27 are symmetrically fixedly installed on the side of the rotating plate 18 away from the limiting member 19. Rotating rods 28 are hinged to the ends of the two connecting rods 27 away from each other. Clips 29 are fixedly installed on the outer wall of the end of the rotating rod 28 away from the corresponding connecting rod 27. A retaining ring 30 is fixedly installed on the end of the protective shell 13 away from the connecting member 15. The clips 29 are engaged inside the retaining ring 30. The compensation components allow for easy disassembly and assembly of the rotary compensator by staff, facilitating the inspection and replacement of its components. They also allow for readjustment of the pressure on the sealing packing 6 after wear and displacement, ensuring it maintains pressure to seal the rotary compensator and preventing pressure loss that could affect its sealing. This design also protects the rotary compensator, reducing external impacts and extending its service life. In this way, by setting the limiting surface 14, the protective shell 13 drives the limiting surface 14 to fit onto the outer wall of the bolt head of multiple bolts 9. One side of the bolt head of bolt 9 can fit with the limiting surface 14. At this time, the rotation of bolt 9 will be blocked by the limiting surface 14, so as to achieve the effect of limiting the rotation of the limiting surface 14. The locking block 16 and the locking slot 17 allow the protective shell 13 and the connector 15 to be locked together for positioning. In this way, by setting the length of the arc-shaped rack 22 to be less than the distance between the two gear sleeves 26, the arc-shaped rack 22 can only drive one gear sleeve 26 to rotate at the same time, so that the gear sleeve 26 drives the nut 10 to tighten the bolt 9, avoiding the need for excessive force to tighten multiple nuts 10 and bolts 9 at the same time. The asymmetrical involute teeth on the arc-shaped rack 22 and gear sleeve 26 allow the arc-shaped rack 22 to tighten the nut 10 and bolt 9 by driving the gear sleeve 26 to achieve a large pressure angle. This allows the arc-shaped rack 22 to be pressed into the limiting member 19 by the gear sleeve 26 through the teeth, compressing the second spring 21 and stopping the arc-shaped rack 22 from tightening the nut 10 and bolt 9 through the gear sleeve 26. Tighten 10 to achieve the effect of automatically stopping tightening after setting the torque. When the arc-shaped rack 22 drives the gear sleeve 26 to remove the nut 10 and bolt 9, the arc-shaped rack 22 and gear sleeve 26 use a small pressure angle of the teeth to allow the teeth of the arc-shaped rack 22 and gear sleeve 26 to hook together. When the arc-shaped rack 22 and gear sleeve 26 remove the nut 10 and bolt 9, the gear sleeve 26 cannot press the arc-shaped rack 22 into the interior of the limiting member 19 through the teeth, so that the arc-shaped rack 22 can remove the nut 10 and bolt 9 normally. The threaded knob 23 can be rotated to change the distance it enters the limiting member 19, thereby changing the pressure exerted by the threaded knob 23 on the support plate 20 against the second spring 21. This causes the second spring 21 to change its pushing pressure on the arc-shaped rack 22, thus changing the force required for the arc-shaped rack 22 to compress the second spring 21. At this time, the arc-shaped rack 22, through the gear sleeve 26, drives the nut 10 and bolt 9 to tighten, and then automatically stops tightening. This changes the torque required to tighten the nut 10 and bolt 9, thus achieving the effect of setting the tightening torque of the nut 10 and bolt 9 through the threaded knob 23. With the setting of the clip 29 and the retaining ring 30, after the rotating rod 28 drives the rotating plate 18 to rotate through the connecting rod 27, it can be clipped onto the retaining ring 30 by the clip 29. The clip 29 and the retaining ring 30 further fix and limit the protective shell 13 and the connecting piece 15 through the rotating rod 28, so that the protective shell 13 and the connecting piece 15 can protect the rotary compensator. Specifically, when installing the rotary compensator, the outer cylinder 1 and inner cylinder 2 can be joined together, and the sealing packing 6, sealing cover 7, and second retaining ring 8 can be installed sequentially on the outer cylinder 1 and inner cylinder 2. Multiple nuts 10 are fixed between the sealing cover 7 and the second retaining ring 8 by bolts 9. Then, the nuts 10 are inserted into the gear sleeve 26 inside the connector 15, and the connector 15 and protective shell 13 are fitted onto the outer cylinder 1 and inner cylinder 2. The protective shell 13 limits the rotation of the bolt head of the bolt 9 through the limiting surface 14, and the gear sleeve 26 inside the connector 15 is aligned with the connecting end of the bolt 9. At this time, the rotating plate 18 can be rotated by the rotating rod 28 and the connecting rod 27, and then the rotating plate 18 drives the arc-shaped rack 22 to sequentially align multiple teeth through the limiting part 19. The gear sleeve 26 rotates, allowing it to connect with the corresponding bolt 9 via the nut 10 through the threaded connection. The connection continues until the nut 10 and bolt 9 are tightened to the set torque. The gear sleeve 26 then stops tightening the nut 10 and bolt 9 when the force exceeds the force required to push the arc-shaped rack 22 to compress the second spring 21 and allow it to enter the limiting member 19. At this point, the gear sleeve 26 compresses the arc-shaped rack 22 into the limiting member 19 and compresses the second spring 21, stopping the tightening of the nut 10 and bolt 9. This achieves the effect of tightening the nut 10 and bolt 9 to the set torque, ensuring that multiple nuts 10 and bolt 9 are tightened to the same torque. This ensures uniform force distribution and generates a uniform clamping force, preventing warping, deformation, or seal failure due to uneven force distribution, thereby improving stability and safety. Furthermore, when the sealing packing 6 is worn to a certain extent, the sealing pressure of the sealing packing 6 at the connection between the outer cylinder 1 and the inner cylinder 2 will decrease due to the first spring 11 pushing the sealing packing 6 through the sealing cover plate 7. At this time, the operator can continue to rotate the rotating plate 18, so that the rotating plate 18 drives the arc-shaped rack 22 to continue tightening the gear sleeve 26 through the limiting part 19, so that the gear sleeve 26 drives the nut 10 and bolt 9 to continue tightening, so that the nut 10 drives the bolt 9 to continue moving towards the outer cylinder 1 through the thread, so that the bolt 9 squeezes the first spring 11 to contract through the second retaining ring 8, so that the first spring 11 increases the pressure on the sealing cover plate 7, so that the sealing cover plate 7 increases the squeezing force on the sealing packing 6. At this time, the sealing pressure of the sealing packing 6 at the connection between the outer cylinder 1 and the inner cylinder 2 is restored, so as to achieve the effect of quickly adjusting and restoring the pressure on the sealing packing 6. Furthermore, when it is necessary to disassemble, repair, or replace parts of the rotary compensator, the rotating plate 18 can be rotated in the opposite direction by rotating rod 28 and connecting rod 27. The rotating plate 18 drives the arc-shaped rack 22 through the limiting member 19, which in turn drives the gear sleeve 26 to rotate in the opposite direction. The gear sleeve 26 then drives the nut 10 to gradually separate from the bolt 9, thereby achieving the effect of quickly disassembling the rotary compensator and facilitating the maintenance of the rotary compensator or the replacement of damaged parts by the staff.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-pressure resistant rotary compensator for pipelines, comprising an outer cylinder (1), characterized in that, One end of the outer cylinder (1) is provided with an inner cylinder (2). An inner sleeve (3) and a first retaining ring (4) are fixedly connected to one end of the outer cylinder (1) near the inner cylinder (2). The inner sleeve (3) abuts against the inner wall of the inner cylinder (2). A connecting sleeve (5) is fixedly connected to the outer wall of the first retaining ring (4) near the inner cylinder (2). A sealing filler (6) and a sealing cover plate (7) are inserted between the connecting sleeve (5) and the inner cylinder (2). The sealing filler (6) abuts against one side of the first retaining ring (4). The compensation component is used to disassemble and assemble the rotary compensator and ensure the sealing effect of the rotary compensator. The compensation component is connected to the outer cylinder (1), the inner cylinder (2), the first retaining ring (4) and the sealing cover plate (7). The compensation component includes a limiting member (19), a support plate (20) is slidably connected inside the limiting member (19), a plurality of second springs (21) are fixedly installed on one side of the support plate (20), an arc-shaped rack (22) is fixedly installed on the end of the plurality of second springs (21) away from the support plate (20), the arc-shaped rack (22) is slidably connected inside the limiting member (19), and a threaded knob (23) is rotatably connected on the side of the support plate (20) away from the second springs (21), the threaded knob (23) is threadedly connected inside the limiting member (19); The compensation assembly also includes a second retaining ring (8) sleeved on the outer wall of the inner cylinder (2). The second retaining ring (8) is located on the side of the sealing cover plate (7) near the inner cylinder (2). A plurality of first springs (11) are provided circumferentially between the sealing cover plate (7) and the second retaining ring (8). Bolts (9) are inserted into the interior of each of the plurality of first springs (11). The plurality of bolts (9) are inserted into the interior of the second retaining ring (8), the sealing cover plate (7), and the first retaining ring (4). The outer wall of the end of the plurality of bolts (9) near the outer cylinder (1) is open to the outside. A nut (10) is threaded onto the inner cylinder (2). Multiple mounting pieces (12) are fixedly installed on the outer wall of the inner cylinder (2) in a circumferentially equidistant manner. A protective shell (13) is fitted onto the outer walls of the outer cylinder (1) and the inner cylinder (2). The mounting pieces (12) are inserted into the interior of the protective shell (13). A limiting surface (14) is provided inside the protective shell (13). One side of the bolt head (9) is in contact with the inner wall of the protective shell (13). A connector (15) is provided at one end of the protective shell (13) near the outer cylinder (1). The connector (15) is located away from the outer cylinder (1). One end of the protective shell (13) is rotatably connected to a rotating plate (18). The connecting piece (15) and the rotating plate (18) are sleeved on the outer wall of the outer cylinder (1). The limiting piece (19) is fixedly installed on one side of the rotating plate (18). Multiple limiting rings (25) are fixedly installed in a circumferentially equidistant array inside the connecting piece (15). Gear sleeves (26) are rotatably connected inside each of the multiple limiting rings (25). The number of gear sleeves (26) is the same as the number of nuts (10). The nuts (10) are inserted into the inside of the gear sleeves (26). One of the gear sleeves (26) meshes with the arc-shaped rack (22). Two connecting rods (27) are symmetrically fixedly installed on the side of the rotating plate (18) away from the limiting member (19). The ends of the two connecting rods (27) that are far apart from each other are hinged with rotating rods (28). The outer wall of the end of the rotating rod (28) away from the corresponding connecting rod (27) is fixedly installed with a clip (29). The end of the protective shell (13) away from the connecting member (15) is fixedly installed with a retaining ring (30). The clip (29) is engaged inside the retaining ring (30).

2. The high-pressure resistant rotary compensator for pipelines according to claim 1, characterized in that, The connector (15) is fixedly connected to a plurality of locking blocks (16) at one end near the protective shell (13). The protective shell (13) has a slot (17) that matches the number and size of the locking blocks (16). The locking blocks (16) are engaged inside the slot (17).

Images