Sealing pressure compensation device
By combining the design of limiting components and buffer components, the problem that existing devices cannot simultaneously limit the lateral and radial deformation of bellows is solved, thus achieving stable sealing performance and extended equipment life, and adapting to pressure fluctuations and temperature changes under complex working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU CHUXIN HEAVY IND CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-04-24
AI Technical Summary
Existing sealing pressure compensation devices cannot simultaneously limit the lateral and radial deformation of bellows, resulting in a lack of stability and difficulty in increasing the service life of bellows.
The design employs a synergistic approach of limiting and buffering components, including flanges, mounting plates, connecting rods, limiting rods, bolts, and buffering components. Through multi-stage buffering and precise limiting, it restricts the deformation of the metal bellows and absorbs the thermal expansion and contraction deformation of the piping system.
It effectively absorbs and compensates for the thermal expansion and contraction deformation of the pipeline system, maintains stable sealing performance, reduces mechanical stress concentration, extends equipment service life, adapts to pressure fluctuations and temperature changes under complex working conditions, and ensures the long-term safe and reliable operation of the pipeline system.
Smart Images
Figure CN224162261U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compensation device technology, and in particular to a sealing pressure compensation device. Background Technology
[0002] Pressure pipelines are closed pipeline systems used to transport gas, liquid, or gas-liquid mixtures and are subjected to a certain pressure inside. These pipelines are widely used in industrial fields such as petrochemicals, energy and power, and urban gas, undertaking important functions such as energy transmission and process support. Pressure pipelines are usually composed of pipes, connectors, valves, and support structures. Appropriate materials must be selected according to the characteristics of the medium. Their design, manufacturing, and use must follow strict safety standards and be regularly inspected and maintained to ensure the safe and stable operation of the system and prevent risks such as leakage or explosion.
[0003] Pipeline sealing pressure compensation devices are used to compensate for pressure and temperature changes in pipeline systems. They are usually made of elastic materials and can freely expand and contract in the pipeline system to absorb the expansion and contraction of the pipeline caused by pressure and temperature changes. Generally, pressure compensation devices use bellows, which are prone to deformation when thermal expansion and contraction occur. Existing devices can usually be equipped with buffer structures, but they cannot simultaneously limit the lateral and radial deformation of the bellows, so stability cannot be guaranteed and it is difficult to increase the service life of the bellows. Therefore, a sealing pressure compensation device is needed. Utility Model Content
[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a sealing pressure compensation device that can solve the problem that existing devices can usually be equipped with a buffer structure, but cannot simultaneously limit the lateral deformation and radial deformation of the bellows, thus failing to guarantee stability and making it difficult to increase the service life of the bellows.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing pressure compensation device, comprising a connecting pipe, a limiting component, and a buffer component. Metal bellows are fixedly connected to both sides of the connecting pipe. The limiting component is disposed outside the connecting pipe and includes a flange, a mounting plate, a connecting rod, a limiting rod, a first bolt, and a second bolt. The number of flanges is the same as the number of metal bellows, and they are respectively fixedly sleeved on the outer surface of the metal bellows. Multiple mounting plates are fixedly connected to the surfaces of the flanges. Two connecting rods are respectively disposed on opposite sides of two corresponding mounting plates. Multiple limiting rods are fixedly connected to both ends of the corresponding connecting rods. The first bolt is threaded onto the outer surface of the limiting rod, and the second bolt is threaded onto the outer surface of the limiting rod. The buffer component is disposed on the outer surface of the metal bellows.
[0006] Preferably, the buffer assembly includes a metal collar, a buffer plate, a fixing plate, a telescopic rod, and a hollow sleeve rod. The metal collar is slidably connected to the outer surface of the metal bellows, the buffer plate is fixedly connected to the surface of the metal collar, the fixing plate is fixedly connected to the surface of the metal collar, the telescopic rod is fixedly connected to the surface of the fixing plate, and the hollow sleeve rod is slidably sleeved on the outer surface of the telescopic rod.
[0007] Preferably, there are multiple first bolts and multiple second bolts, and the mounting plate is located between the first bolts and the second bolts.
[0008] Preferably, a connecting plate is fixedly connected inside the hollow sleeve rod, and a return spring is fixedly connected to both sides of the connecting plate.
[0009] Preferably, the end of the telescopic rod closest to the return spring is fixedly connected to the return spring.
[0010] Preferably, the number of buffer components is two, and both are disposed on the outer surface of the metal bellows.
[0011] Preferably, the outer surface of the connecting pipe is welded with two limiting rings to limit the movement of the metal collar.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This sealing pressure compensation device effectively absorbs and compensates for the thermal expansion and contraction deformation of the pipeline system through the synergistic effect of multi-stage buffering and precise limiting, maintaining stable sealing performance, reducing mechanical stress concentration, and extending equipment service life. It also has advantages such as compact structure, flexible adjustment, and easy maintenance. It can adapt to pressure fluctuations and temperature changes under complex working conditions, ensuring the long-term safe and reliable operation of the pipeline system. It solves the problem that existing devices can usually set up buffer structures, but cannot simultaneously limit the lateral and radial deformation of the bellows, resulting in unstable stability and difficulty in increasing the service life of the bellows. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0015] Figure 1 This is a schematic diagram of the main body of this utility model;
[0016] Figure 2 This is a schematic diagram of the connecting rod of this utility model;
[0017] Figure 3 This is a schematic diagram of the buffer component of this utility model;
[0018] Figure 4 This is a schematic diagram of the metal collar of this utility model;
[0019] Figure 5 For the present utility model Figure 4 Schematic diagram at point A in the middle.
[0020] Reference numerals: 1. Connecting pipe; 2. Corrugated metal pipe; 3. Limiting assembly; 4. Flange; 5. Mounting plate; 6. Connecting rod; 7. Limiting rod; 8. First bolt; 9. Second bolt; 10. Metal collar; 11. Buffer plate; 12. Fixing plate; 13. Telescopic rod; 14. Hollow sleeve rod; 15. Connecting plate; 16. Return spring; 17. Buffering assembly; 18. Limiting ring. Detailed Implementation
[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0023] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequential relationship of the indicated technical features.
[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0025] Please see Figure 1-5This utility model provides a technical solution: a sealing pressure compensation device, including a connecting pipe 1, a limiting component 3, and a buffer component 17. Metal bellows 2 are fixedly connected to both sides of the connecting pipe 1. The limiting component 3 is disposed outside the connecting pipe 1 and includes flanges 4, mounting plates 5, connecting rods 6, limiting rods 7, a first bolt 8, and a second bolt 9. The number of flanges 4 is the same as the number of metal bellows 2, and they are respectively fixedly sleeved on the outer surface of the metal bellows 2. Multiple mounting plates 5 are present, and they are all fixedly connected to the surface of the flanges 4. Two connecting rods 6 are present, and they are respectively disposed on the opposite sides of two corresponding mounting plates 5. Multiple limiting rods 7 are present, and they are respectively fixedly connected to both ends of the corresponding connecting rods 6. The first bolt 8 is threaded onto the outer surface of the limiting rod 7, and the second bolt 9 is threaded onto the outer surface of the limiting rod 7.
[0026] Furthermore, the buffer assembly 17 is disposed on the outer surface of the metal bellows 2. The buffer assembly 17 includes a metal collar 10, a buffer plate 11, a fixing plate 12, a telescopic rod 13, and a hollow sleeve rod 14. The metal collar 10 is slidably connected to the outer surface of the metal bellows 2. The buffer plate 11 is fixedly connected to the surface of the metal collar 10. The fixing plate 12 is fixedly connected to the surface of the metal collar 10. The telescopic rod 13 is fixedly connected to the surface of the fixing plate 12. The hollow sleeve rod 14 is slidably sleeved on the outer surface of the telescopic rod 13. There are multiple first bolts 8 and second bolts 9. The mounting plate 5 is located between the first bolts 8 and second bolts 9. A connecting plate 15 is fixedly connected inside the hollow sleeve rod 14. Return springs 16 are fixedly connected to both sides of the connecting plate 15. The end of the telescopic rod 13 near the return spring 16 is fixedly connected to the return spring 16. There are two buffer assemblies 17, both disposed on the outer surface of the metal bellows 2. Two limiting rings 18 are welded to the outer surface of the connecting pipe 1 to limit the movement of the metal collar 10.
[0027] Furthermore, when the metal bellows 2 undergoes thermal expansion and contraction, it drives the buffer plate 11 to move, thereby causing the metal collar 10, the fixing plate 12, and the telescopic rod 13 to move. The return spring 16 applies force to the buffer plate 11, causing the buffer plate 11 to tend to return to its original position, thus preventing deformation of the metal bellows 2. The setting of the limiting ring 18 can limit the buffer assembly 17, preventing the buffer assembly 17 from detaching from the metal bellows 2. When the metal bellows 2 expands and contracts, it drives the flange 4 and the mounting plate 5 to move. The fixed sleeve on the outer surface of the limiting rod 7 can limit the movement of the mounting plates 5 on both sides. The setting of the limiting assembly 3 guides the metal bellows 2 when the pipeline expands due to temperature rise or contracts due to temperature drop, thereby protecting the pipeline system from damage.
[0028] Furthermore, through the synergistic effect of multi-stage buffering and precise limiting, it effectively absorbs and compensates for the thermal expansion and contraction deformation of the pipeline system, maintains stable sealing performance, reduces mechanical stress concentration, and extends the service life of the equipment. At the same time, it has advantages such as compact structure, flexible adjustment, and simple maintenance. It can adapt to pressure fluctuations and temperature changes under complex working conditions, ensuring the long-term safe and reliable operation of the pipeline system. It solves the problem that existing devices can usually be equipped with buffer structures, but cannot simultaneously limit the lateral and radial deformation of the bellows, resulting in unstable stability and difficulty in increasing the service life of the bellows.
[0029] Structural Description: Connecting Pipe 1: As the core conveying component of the entire device, it undertakes the function of media flow and provides an installation foundation for other components, ensuring the structural integrity of the system.
[0030] Metal bellows 2: It absorbs the displacement deformation of the pipeline caused by temperature changes or pressure fluctuations through its own flexible expansion and contraction characteristics, and plays a compensating and sealing role.
[0031] Limiting component 3: A guide constraint mechanism composed of multiple parts working together to limit the expansion and contraction direction of the metal bellows and prevent excessive offset from causing structural failure.
[0032] Flange 4: As a transitional connection between the metal bellows and the external pipeline, it has both sealing and fixing functions, and provides a support surface for the mounting plate.
[0033] Mounting plate 5: As a bearing platform for the limiting component, it links the flange with the connecting rod, limiting rod and other components to transmit displacement constraint force.
[0034] Connecting rod 6: It connects the mounting plates on both sides laterally to form a rigid frame, ensuring the synchronous movement of the limit rod and maintaining structural stability.
[0035] Limiting rod 7: It physically limits the movement of the mounting plate by axial arrangement, preventing the metal bellows from expanding or contracting beyond its range.
[0036] First bolt 8 and second bolt 9: respectively adjust the tightness of the limit rod to make the tightness of the limit assembly adjustable to meet different working conditions.
[0037] Metal collar 10: As a sliding base of the buffer assembly, it moves with the deformation of the metal bellows, driving the buffer plate to transfer kinetic energy.
[0038] Buffer plate 11: Converts the mechanical deformation of the metal bellows into the linear motion of the buffer assembly, triggering the return spring.
[0039] Fixed plate 12: Fixes the relative position of the telescopic rod and the metal collar to ensure the continuity of the buffer force transmission path.
[0040] Telescopic rod 13 and hollow sleeve rod 14: form an elastic telescopic pair, which guides the buffer direction through sliding cooperation and assists the return spring in storing and releasing energy.
[0041] Connecting plate 15: Integrated inside the hollow sleeve rod, serving as the fixed anchor point for the return spring and coordinating the bidirectional elastic restoring force.
[0042] Return spring 16: Absorbs impact energy through elastic deformation, drives the buffer assembly to reset, and suppresses residual vibration of the metal bellows.
[0043] Buffer component 17: The whole structure uses a dynamic damping mechanism to alleviate the deformation stress of the metal bellows and reduce the risk of fatigue damage.
[0044] Limiting ring 18: Welded to the outer wall of the connecting pipe to prevent the buffer assembly from slipping and failing, ensuring that it is always within the effective working range.
[0045] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A sealing pressure compensation device, characterized in that, include: Connecting pipe (1), both sides of the connecting pipe (1) are fixedly connected with metal corrugated pipes (2); Limiting assembly (3) is set outside the connecting pipe (1). The limiting assembly (3) includes flange (4), mounting plate (5), connecting rod (6), limiting rod (7), first bolt (8) and second bolt (9). The number of flanges (4) is the same as that of metal bellows (2) and they are respectively fixedly sleeved on the outer surface of metal bellows (2). There are multiple mounting plates (5) and they are all fixedly connected to the surface of flange (4). There are two connecting rods (6) and they are respectively set on the opposite side of two corresponding mounting plates (5). There are multiple limiting rods (7) and they are respectively fixedly connected to the two ends of the corresponding connecting rods (6). The first bolt (8) is threaded on the outer surface of the limiting rod (7) and the second bolt (9) is threaded on the outer surface of the limiting rod (7). A buffer assembly (17) is disposed on the outer surface of the metal bellows (2).
2. The sealing pressure compensation device according to claim 1, characterized in that: The buffer assembly (17) includes a metal collar (10), a buffer plate (11), a fixing plate (12), a telescopic rod (13), and a hollow sleeve (14). The metal collar (10) is slidably connected to the outer surface of the metal bellows (2). The buffer plate (11) is fixedly connected to the surface of the metal collar (10). The fixing plate (12) is fixedly connected to the surface of the metal collar (10). The telescopic rod (13) is fixedly connected to the surface of the fixing plate (12). The hollow sleeve (14) is slidably sleeved on the outer surface of the telescopic rod (13).
3. The sealing pressure compensation device according to claim 1, characterized in that: There are multiple first bolts (8) and second bolts (9), and the mounting plate (5) is located between the first bolts (8) and second bolts (9).
4. A sealing pressure compensation device according to claim 2, characterized in that: The hollow sleeve rod (14) is internally fixedly connected to a connecting plate (15), and a return spring (16) is fixedly connected to both sides of the connecting plate (15).
5. A sealing pressure compensation device according to claim 2, characterized in that: The end of the telescopic rod (13) near the return spring (16) is fixedly connected to the return spring (16).
6. A sealing pressure compensation device according to claim 1, characterized in that: The number of buffer components (17) is two, and both are located on the outer surface of the metal bellows (2).
7. A sealing pressure compensation device according to claim 1, characterized in that: Two limiting rings (18) are welded to the outer surface of the connecting pipe (1) to limit the metal collar (10).