A no-thrust curved pipe pressure balance bellows compensator

Abstract

This utility model relates to the technical field of bellows compensators and discloses a thrustless curved pipe pressure-balanced bellows compensator, including a bellows body, flanges fixedly connected to both sides of the bellows body, a protective mechanism fixedly connected inside the bellows body, and a restraint mechanism fixedly connected to the side of the flanges. The non-expanding area inside the bellows body is fixedly connected to the protective mechanism, while the expanding and contracting middle area inside the bellows body is separated from the protective mechanism. The limiting grooves on both sides of this utility model are fixedly connected to the non-expanding areas on both sides of the bellows body. When the bellows body expands or contracts, it drives the limiting grooves to move. The limiting grooves move on both sides of the inner protective pipe, and the sealing plate is in a sealed state with the limiting grooves when it moves inside the limiting grooves. The expansion and contraction area of ​​the bellows body is always located between the inner protective pipe and the limiting grooves, and will not come into contact with the transported material, thus protecting the bellows body.

Description

Technical Field

[0001] This utility model relates to the field of corrugated compensator technology, and more specifically to a thrustless curved pipe pressure-balanced corrugated compensator. Background Technology

[0002] In industrial pipeline systems, pipelines inevitably experience thermal displacement and vibration due to factors such as changes in medium temperature, mechanical vibration, or foundation settlement. In order to ensure the safe operation of the system, protect equipment interfaces, and reduce pipeline stress, bellows compensators have become an indispensable key flexible component. Bellows compensators can absorb displacement and pressure during use.

[0003] Pressure-balanced bellows compensators typically employ two sets of bellows and an intermediate pressure-balanced structure. They utilize the medium pressure to form a self-balancing system within the compensator, significantly reducing or bringing the net thrust acting on the fixed points of the pipeline to near zero. This reduces the load on the fixed supports, simplifies the support structure, and improves system reliability and economy.

[0004] When using modern corrugated compensators, the bellows will stretch and contract, and the bellows cannot directly withstand the impact force of the material being transported inside. Therefore, a protective tube needs to be welded inside the bellows. One side of the protective tube is connected to the unstretched part of the bellows, while the other side is in an open state. At this time, a lot of material will still come into contact with the bellows, which will damage the bellows. In addition, when the current bellows is fixed and protected by the external lugs and bolt structure, it cannot adapt to the radial movement of the bellows and is easily damaged. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a thrustless curved pipe pressure balance bellows compensator to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a thrustless curved pipe pressure balancing bellows compensator, comprising a bellows body, flanges fixedly connected to both sides of the bellows body, a protection mechanism fixedly connected inside the bellows body, a constraint mechanism fixedly connected to the side of the flanges, a non-expanding area inside the bellows body fixedly connected to the protection mechanism, and an expanding and contracting middle area inside the bellows body separated from the protection mechanism; the protection mechanism includes a protective inner protective tube, sealing plates fixedly connected to both sides of the inner protective tube, and a limiting groove cylinder movably connected to the side of the sealing plate away from the inner protective tube, with a movable groove on the side of the limiting groove cylinder near the sealing plate, and the sealing plate located within the movable groove of the limiting groove cylinder.

[0007] Furthermore, the inner protective tube is separated from the interior of the corrugated pipe body, and the side of the limiting groove is fixedly connected to the non-expanding area inside the corrugated pipe body. Both the inner protective tube and the limiting groove are made of elastic material.

[0008] Furthermore, a conical ring is fixedly connected to the side of the limiting groove cylinder away from the inner protective tube, and the opening diameter of the conical ring away from the inner protective tube is larger than the opening diameter of the conical ring in contact with the side of the limiting groove cylinder.

[0009] Furthermore, the constraint mechanism includes a first ear plate and a second ear plate that are fixedly connected to the two flanges respectively. A threaded rod is movably connected inside the first ear plate. A first limiting plate and a second limiting plate are fixedly connected to the side of the threaded rod near the first ear plate. The first limiting plate and the second limiting plate are located on both sides of the first ear plate.

[0010] Furthermore, a fixing nut is threadedly connected to the side of the threaded rod away from the first limiting plate, a rotating plate is threadedly connected to the side of the threaded rod, a connecting shaft is fixedly connected to both sides of the rotating plate, and the side of the connecting shaft is fixedly and movably connected to the mounting hole inside the second ear plate.

[0011] Furthermore, the fixing nut is located on the side of the rotating plate away from the first ear plate, and there is a two-millimeter space between the two sides of the rotating plate and the inner side of the second ear plate. When the rotating plate moves along the axis of the connecting shaft inside the second ear plate, the connecting shaft is always located in the mounting hole of the second ear plate.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model comprises an inner protective tube, a sealing plate, and a limiting groove. The limiting grooves on both sides are fixedly connected to the non-expanding areas on both sides of the corrugated pipe body. When the corrugated pipe body expands or contracts, it drives the limiting grooves to move. When the limiting grooves move, they move on both sides of the inner protective tube. When the sealing plate moves inside the limiting grooves, it is in a sealed state with the limiting grooves. The expansion and contraction area of ​​the corrugated pipe body is always located between the inner protective tube and the limiting grooves, and will not come into contact with the conveyed material, thus protecting the corrugated pipe body.

[0014] 2. This utility model is provided with a first ear plate, a threaded rod, a rotating plate and a connecting shaft. When the bellows body moves radially, the position between the first ear plate and the second ear plate changes. At this time, the threaded rod will tilt. When the threaded rod tilts, it drives the rotating plate to rotate. The rotating plate rotates around the connecting shaft inside the second ear plate, ensuring that the constraint mechanism as a whole will not be damaged and adapting to the displacement of the bellows body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the protective mechanism structure of this utility model.

[0017] Figure 3 This is an exploded view of the protection mechanism of this utility model.

[0018] Figure 4 This is a schematic diagram of the constraint mechanism structure of this utility model.

[0019] Figure 5 This is an exploded view of the constraint mechanism of this utility model.

[0020] The attached figures are labeled as follows: 1. Bellows body; 2. Flange; 3. Protective mechanism; 301. Inner protective tube; 302. Sealing plate; 303. Limiting groove; 304. Conical ring; 4. Constraint mechanism; 401. First ear plate; 402. Threaded rod; 403. First limiting plate; 404. Second limiting plate; 405. Fixing nut; 406. Rotating plate; 407. Connecting shaft; 408. Second ear plate. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figure 1 and Figure 2 This utility model provides a pressure-balanced bellows compensator for a non-thrust curved pipe, including a bellows body 1, flanges 2 fixedly connected to both sides of the bellows body 1, a protection mechanism 3 fixedly connected inside the bellows body 1, a restraint mechanism 4 fixedly connected to the side of the flanges 2, a non-expansion area inside the bellows body 1 fixedly connected to the protection mechanism 3, and a middle area inside the bellows body 1 that expands and contracts separated from the protection mechanism 3.

[0023] In this embodiment, the non-stretchable area within the corrugated pipe body 1 is fixedly connected to the protection mechanism 3, while the stretchable middle area is separated from the protection mechanism 3. Therefore, during use, the protection mechanism 3 will stretch to adapt to the stretching dimensions of the corrugated pipe body 1, thus providing protection for the corrugated pipe body 1.

[0024] Reference Figure 2 and Figure 3The protection mechanism 3 includes an inner protective tube 301 for protection. Sealing plates 302 are fixedly connected to both sides of the inner protective tube 301. Limiting groove cylinders 303 are movably connected to the sides of the sealing plates 302 away from the inner protective tube 301. The side of the limiting groove cylinder 303 near the sealing plates 302 has a movable groove. The sealing plates 302 are located in the movable groove of the limiting groove cylinder 303. The inner protective tube 301 is separated from the interior of the corrugated pipe body 1. The side of the limiting groove cylinder 303 is fixedly connected to the non-expanding area inside the corrugated pipe body 1. Both the inner protective tube 301 and the limiting groove cylinder 303 are made of elastic material. A conical ring 304 is fixedly connected to the side of the limiting groove cylinder 303 away from the inner protective tube 301. The opening diameter of the side of the conical ring 304 away from the inner protective tube 301 is larger than the opening diameter of the conical ring 304 that contacts the side of the limiting groove cylinder 303.

[0025] In this embodiment, when the limiting grooves 303 on both sides move with the bellows body 1, the limiting grooves 303 on both sides move on the sides of the inner protective tube 301. During this movement, the sealing plate 302 moves inside the limiting grooves 303. The conveyed material is blocked between the sealing plate 302 and the limiting grooves 303, preventing direct contact with the bellows body 1. Both the inner protective tube 301 and the limiting grooves 303 are made of elastic material, but the sealing plate 302 slides within the limiting grooves 303, achieving a sealing effect. Being made of elastic material, it can move radially without damage. The conical ring 304 has a larger opening diameter away from the sealing plate 302.

[0026] Reference Figure 4 and Figure 5 The constraint mechanism 4 includes a first ear plate 401 and a second ear plate 408, which are fixedly connected to the two flanges 2 respectively. A threaded rod 402 is movably connected inside the first ear plate 401. A first limiting plate 403 and a second limiting plate 404 are fixedly connected to the side of the threaded rod 402 near the first ear plate 401. The first limiting plate 403 and the second limiting plate 404 are located on both sides of the first ear plate 401. A fixing nut 405 is threadedly connected to the side of the threaded rod 402 away from the first limiting plate 403. A rotating plate 406 is threadedly connected, and a connecting shaft 407 is fixedly connected to both sides of the rotating plate 406. The side of the connecting shaft 407 is fixedly and movably connected to the mounting hole inside the second ear plate 408. The fixing nut 405 is located on the side of the rotating plate 406 away from the first ear plate 401. There is a two-millimeter space between the two sides of the rotating plate 406 and the inner side of the second ear plate 408. When the rotating plate 406 moves along the axis of the connecting shaft 407 inside the second ear plate 408, the connecting shaft 407 is always located in the mounting hole of the second ear plate 408.

[0027] In this embodiment, when the bellows body 1 undergoes partial radial movement, the first ear plate 401 drives one end of the threaded rod 402 to move, and the second ear plate 408 drives the other end of the threaded rod 402 to move. During the movement, the threaded rod 402 drives the rotating plate 406 to rotate. When the rotating plate 406 rotates, it drives the connecting shafts 407 on both sides to rotate within the second ear plate 408. When partial radial displacement occurs, it is not easily damaged, improving the safety of this application during use. Furthermore, when the rotating plate 406 rotates in one direction, the rotating plate 406 in the other direction moves, thereby enabling this application to move radially and ensuring the overall performance of this application.

[0028] The working principle of this utility model is as follows: When conveying materials, the conveyed materials flow within the protective mechanism 3. When the corrugated pipe body 1 expands or contracts, the expansion or contraction of the corrugated pipe body 1 drives the flange 2 to move. The area of ​​the corrugated pipe body 1 that does not expand or contract drives the limiting groove cylinders 303 on both sides to move. The limiting groove cylinders 303 on both sides move on the side of the inner protective pipe 301. When they move, the sealing plate 302 moves inside the limiting groove cylinder 303. The conveyed materials are blocked between the sealing plate 302 and the limiting groove cylinder 303, preventing them from directly contacting the corrugated pipe body 1.

[0029] When the bellows body 1 undergoes partial radial movement, misalignment will occur between the first ear plate 401 and the second ear plate 408. At this time, the first ear plate 401 drives one end of the threaded rod 402 to move, and the second ear plate 408 drives the other end of the threaded rod 402 to move. During the movement, the threaded rod 402 drives the rotating plate 406 to rotate. When the rotating plate 406 rotates, it drives the connecting shafts 407 on both sides to rotate within the second ear plate 408. This makes the present application less prone to damage when partial radial displacement occurs, thus improving the safety of the present application during use.

[0030] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pressure-balanced bellows compensator for a thrustless curved pipe, comprising a bellows body (1), characterized in that: Flanges (2) are fixedly connected to both sides of the corrugated pipe body (1). A protective mechanism (3) is fixedly connected inside the corrugated pipe body (1). A restraint mechanism (4) is fixedly connected to the side of the flange (2). The non-expanding area inside the corrugated pipe body (1) is fixedly connected to the protective mechanism (3). The expanding middle area inside the corrugated pipe body (1) is separated from the protective mechanism (3). The protective mechanism (3) includes an inner protective pipe (301) that can be protected. Sealing plates (302) are fixedly connected to both sides of the inner protective pipe (301). Limiting groove cylinders (303) are movably connected to the sides of the sealing plates (302) away from the inner protective pipe (301). The limiting groove cylinder (303) has a movable groove on the side near the sealing plate (302). The sealing plate (302) is located in the movable groove of the limiting groove cylinder (303).

2. The thrustless curved pipe pressure-balanced bellows compensator according to claim 1, characterized in that: The inner protective tube (301) is separated from the interior of the corrugated pipe body (1), and the side of the limiting groove (303) is fixedly connected to the non-expanding area inside the corrugated pipe body (1). Both the inner protective tube (301) and the limiting groove (303) are made of elastic material.

3. The thrustless curved pipe pressure balancing bellows compensator according to claim 2, characterized in that: A conical ring (304) is fixedly connected to the side of the limiting groove (303) away from the inner protective tube (301). The opening diameter of the side of the conical ring (304) away from the inner protective tube (301) is larger than the opening diameter of the conical ring (304) in contact with the side of the limiting groove (303).

4. The thrustless curved pipe pressure-balanced bellows compensator according to claim 1, characterized in that: The constraint mechanism (4) includes a first ear plate (401) and a second ear plate (408) which are fixedly connected to the two flanges (2) respectively. A threaded rod (402) is movably connected inside the first ear plate (401). A first limiting plate (403) and a second limiting plate (404) are fixedly connected to the side of the threaded rod (402) near the first ear plate (401). The first limiting plate (403) and the second limiting plate (404) are located on both sides of the first ear plate (401).

5. A thrustless curved pipe pressure-balanced bellows compensator according to claim 4, characterized in that: The threaded rod (402) is threaded with a fixing nut (405) on the side away from the first limiting plate (403). The threaded rod (402) is threaded with a rotating plate (406) on the side. The rotating plate (406) is fixedly connected with connecting shafts (407) on both sides. The side of the connecting shaft (407) is fixedly and movably connected to the mounting hole inside the second ear plate (408).

6. The thrustless curved pipe pressure-balanced bellows compensator according to claim 5, characterized in that: The fixing nut (405) is located on the side of the rotating plate (406) away from the first ear plate (401). There is a two-millimeter space between the two sides of the rotating plate (406) and the inner side of the second ear plate (408). When the rotating plate (406) moves along the axis of the connecting shaft (407) inside the second ear plate (408), the connecting shaft (407) is always located in the mounting hole of the second ear plate (408).

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