Multi-dimensional compensation bellow expansion joint

Abstract

The utility model discloses a multi-dimensional compensation bellow expansion joint, and particularly relates to the technical field of expansion joints, the multi-dimensional compensation bellow expansion joint comprises a multi-directional structure, a limiting ring and a clamping ring, an inner cavity of the multi-directional structure is provided with a plug cavity, and the limiting ring is welded at one end, far away from the multi-directional structure, of an outer pipe structure and one end, far away from the multi-directional structure, of an inner pipe structure; according to the utility model, through the multidirectional structure and the pipelines connected in four directions, when the pipelines are subjected to axial and radial forces generated by an external environment or non-uniform internal pressure, the pipelines in each direction and the multilayer corrugated expansion structures thereof can be elastically deformed in the axial and radial directions, so that the axial and radial forces are absorbed and dispersed; the pipelines in the four directions can be absorbed through connection and extension of the corrugated expansion structures and the multi-direction structures of the pipelines respectively, axial and radial force is compensated jointly, and the connecting flanges can correspond to connecting holes and positions of other pipelines through the rotation function of the limiting rings and the clamping rings. And the corrugated expansion pipe can freely rotate within a certain angle range, so that angular compensation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, and more specifically, to a multi-dimensional compensating bellows expansion joint. Background Art

[0002] The expansion joint is a flexible structure installed on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. As an elastic compensation element that can freely expand and contract;

[0003] After searching, the existing patent (publication number: CN218883339U) discloses a new type of thick-walled expansion joint, including a bellows, a left flange, and a right flange. An annular disc is provided on both sides of the bellows, and a compensation tube is welded between the annular discs on both sides. A cavity is formed between the bellows, the annular disc and the compensation tube, and a pressure control hole is provided on the outer surface of the annular circle: through the mutual cooperation between the annular disc, the cavity, the pressure control hole and the compensation tube composed of multiple arc surfaces, the stress concentration on the inner wall of the compensation tube during use is low, which can effectively reduce the impact of stress concentration on the inner wall of the expansion joint during use, greatly reduce the probability of stress corrosion, thereby effectively improving the service life of the expansion joint and avoiding the situation where the stress concentration on the inner wall of the expansion joint during use is serious and stress corrosion is prone to occur, resulting in a short service life. In the process of realizing this utility model, the inventor found that the existing technology has the following problems:

[0004] Existing expansion joints are unable to fully cope with these complex displacements because, in the actual operating environment of a pipeline system, the pipeline not only has to transport high-temperature and high-pressure fluids, but is also affected by factors such as the vibration of surrounding equipment, thermal expansion, and pipeline layout. When the high-temperature fluid in the pipeline causes the pipeline to expand and contract due to heat and cold, axial displacement will occur. The vibration of surrounding equipment and the complexity of the pipeline layout will cause angular and radial displacement of the pipeline. As a result, the expansion joint cannot fully cope with these complex displacements, which can easily lead to safety accidents.

[0005] Therefore, a multi-dimensional compensation bellows expansion joint is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-dimensional compensating bellows expansion joint to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-dimensional compensating bellows expansion joint, comprising a multi-directional structure, a limiting ring and a retaining ring, the inner cavity of the multi-directional structure is provided with a plug cavity, the multi-directional structure is provided with discharge ports on all four sides, the inner walls of the four groups of discharge ports are all installed with first sealing gaskets, the inner cavity of the plug cavity is provided with a reversing spherical plug, the inner cavity of the reversing spherical plug is provided with a medium channel, the front end surface of the multi-directional structure is provided with a connecting rod, the front end surface of the connecting rod is provided with a steering wheel, the surfaces of the four groups of discharge ports are all installed with outer tube structures, the inner cavity of the outer tube structure is provided with an inner tube structure, and a sandwich is provided between the outer tube structure and the inner tube structure;

[0008] The limiting ring is welded to the end of the outer tube structure and the inner tube structure away from the multi-directional structure, the clamping ring is arranged on the outer surface of the limiting ring, a second sealing gasket is installed between the limiting ring and the clamping ring, and a connecting flange is welded to the end of the limiting ring away from the outer tube structure.

[0009] Preferably, the plug cavity is connected to the four groups of discharge ports, the inner diameter of the medium channel is smaller than the inner diameter of the first sealing gasket, the inner diameter of the first sealing gasket is smaller than the inner diameter of the discharge port, and the outer surface of the first sealing gasket abuts against the inner surface of the discharge port.

[0010] Preferably, the outer surface of the reversing spherical plug abuts against one side of the first sealing gasket, and the first sealing gasket and the second sealing gasket are both made of silicone.

[0011] Preferably, the connecting rod passes through the multi-directional structure and is connected to the reversing spherical plug. The steering wheel is rotated to change the angle of the connecting rod body, and the connecting rod is controlled to adjust the rotation angle of the reversing spherical plug.

[0012] Preferably, after the second sealing gasket is sleeved on the outer surface of the limiting ring, it abuts against the inner surface of the clamping ring to achieve sealing. When the connecting flange is rotated, the clamping ring is controlled to rotate on the outer surface of the limiting ring.

[0013] Preferably, the material of the interlayer is rubber, and the outer tube structure, the inner tube structure and the interlayer form a multi-layer corrugated expansion structure.

[0014] The technical effects and advantages of this utility model are:

[0015] 1. Compared with the existing technology, the multi-dimensional compensation bellows expansion joint is connected to the pipelines in four directions through a multi-directional structure. When the pipelines are subjected to axial and radial forces generated by the external environment or uneven internal pressure, the pipelines in each direction and their multi-layered bellows expansion structures can elastically deform in the axial and radial directions to absorb and disperse the axial and radial forces. The pipelines in the four directions can each absorb the forces through the connection and extension of their bellows expansion structures and the multi-directional structure, and jointly compensate for the axial and radial forces.

[0016] 2. Compared with the existing technology, the multi-dimensional compensation bellows expansion joint can make the connecting flange correspond to the connecting holes and positions of other pipelines through the rotation function of the limit ring and the clamping ring, so that the corrugated expansion tube can rotate freely within a certain angle range, thereby achieving angular compensation. When the pipeline needs to change its angle due to thermal expansion and contraction, equipment vibration or installation error during operation, it can easily adapt to this angular displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front cross-section structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the cross section of the outer tube structure of the present invention.

[0019] Figure 3 This is a side view schematic diagram of the multi-directional structure of the utility model.

[0020] Figure 4 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point A in the figure.

[0021] The figures are marked as follows: 1. multi-directional structure; 2. plug cavity; 3. discharge port; 4. first sealing gasket; 5. reversing spherical plug; 6. medium channel; 7. connecting rod; 8. steering wheel; 9. outer tube structure; 10. inner tube structure; 11. interlayer; 12. limiting ring; 13. retaining ring; 131. second sealing gasket; 14. connecting flange. DETAILED DESCRIPTION

[0022] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] As attached Figures 1 to 4The multi-dimensional compensating bellows expansion joint shown includes a multi-directional structure 1, a limiting ring 12 and a retaining ring 13. The inner cavity of the multi-directional structure 1 is provided with a plug cavity 2, and the multi-directional structure 1 is provided with discharge ports 3 on all four sides. The inner walls of the four groups of discharge ports 3 are all installed with first sealing gaskets 4. The inner cavity of the plug cavity 2 is installed with a reversing spherical plug 5, and the inner cavity of the reversing spherical plug 5 is provided with a medium channel 6. The front end surface of the multi-directional structure 1 is provided with a connecting rod 7, and the front end surface of the connecting rod 7 is provided with a steering wheel 8. The surfaces of the four groups of discharge ports 3 are all installed with outer tube structures 9, the inner cavity of the outer tube structure 9 is provided with an inner tube structure 10, and an interlayer 11 is provided between the outer tube structure 9 and the inner tube structure 10;

[0025] The limiting ring 12 is welded to the end of the outer tube structure 9 and the inner tube structure 10 away from the multi-directional structure 1, the clamping ring 13 is arranged on the outer surface of the limiting ring 12, and a second sealing gasket 131 is installed between the limiting ring 12 and the clamping ring 13. The end of the limiting ring 12 away from the outer tube structure 9 is welded with a connecting flange 14.

[0026] Among them: the discharge ports 3 opened around the multi-directional structure 1 provide multi-directional medium transmission channels, which enables the pipeline system to flexibly connect other pipelines in different directions. When the pipeline composed of the outer tube structure 9, the inner tube structure 10 and the interlayer 11 extending from the four groups of discharge ports 3 is subjected to axial and radial forces, the multi-directional structure 1 and the multi-layer corrugated expansion structure connected in four directions can work together to effectively absorb and disperse these forces. The multi-directional structure cooperates with the pipelines connected in four directions. Its unique multi-layer corrugated expansion structure can effectively absorb and disperse the forces through the elastic deformation of the pipelines in all directions when facing axial and radial forces, and realize precise axial and radial compensation, which greatly improves the ability of the pipeline system to cope with complex external force environments and ensures the stability and safety of pipeline operation. Subsequently, the steering wheel 8 and the connecting rod 7 are used to drive the reversing spherical plug 5 to rotate in the plug cavity 2 to achieve precise control of the medium flow direction. The direction of the medium channel 6 can be changed by rotation, connecting two groups of discharge ports 3 and blocking the other two at the same time. The first sealing gasket 4 installed on the inner wall of the discharge port 3 fills the small gap between the discharge port 3 and the connecting pipe, which can effectively prevent the medium leakage of the reversing spherical plug 5 and ensure good sealing performance. The rotation function composed of the limit ring 12 and the retaining ring 13 allows the multi-layer corrugated expansion structure to rotate freely within a certain angle range to achieve angle compensation, and fills the gap between them through the second sealing gasket 131, and seals while achieving the rotation function. Whether it is thermal expansion and contraction, equipment vibration or installation error caused by angle changes, it can easily adapt to it, so that it can be connected to the external pipe through the connecting flange 14. The above-mentioned axial, radial and angular compensation achieves the effect of multi-dimensional compensation, thereby effectively reducing the stress concentration and damage risk of the pipeline caused by axial, radial and angular problems.

[0027] Example 2

[0028] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working methods. Figures 1 to 4 As shown, see the following description for details:

[0029] As a preferred embodiment, the plug cavity 2 is connected to the four groups of discharge ports 3, the inner diameter of the medium channel 6 is smaller than the inner diameter of the first sealing gasket 4, the inner diameter of the first sealing gasket 4 is smaller than the inner diameter of the discharge port 3, and the outer surface of the first sealing gasket 4 abuts against the inner surface of the discharge port 3; further, the inner diameter of the medium channel 6 is smaller than the first sealing gasket 4, and the inner diameter of the first sealing gasket 4 is smaller than the inner diameter of the discharge port 3, thereby preventing the flow from impacting the first sealing gasket 4 from the gap and causing leakage.

[0030] As a preferred embodiment, the outer surface of the reversing spherical plug 5 abuts against one side of the first sealing gasket 4, and the first sealing gasket 4 and the second sealing gasket 131 are both made of silicone; furthermore, the first sealing gasket 4 and the second sealing gasket 131 made of silicone have excellent elasticity and flexibility. When the first sealing gasket 4 is in tight contact with the reversing spherical plug 5, it can adaptively adjust the degree of fit according to the shape and movement state of the plug, thereby ensuring that under various working conditions, especially in complex conditions such as pipeline pressure fluctuations, temperature changes and vibrations, an extremely reliable sealing effect can be maintained to effectively prevent medium leakage.

[0031] As a preferred embodiment, the connecting rod 7 passes through the multi-directional structure 1 and is connected to the reversing spherical plug 5. The steering wheel 8 is rotated to change the angle of the connecting rod 7, and the connecting rod 7 is controlled to adjust the rotation angle of the reversing spherical plug 5; further, the operator only needs to rotate the steering wheel 8 to drive the connecting rod 7 to accurately change the angle of the reversing spherical plug 5, thereby flexibly adjusting the distribution ratio of the medium in different discharge ports 3, meeting the diverse needs of medium flow and flow direction under different working conditions, and accurately adjusting the conduction direction and opening size of the medium channel 6.

[0032] As a preferred embodiment, the second sealing gasket 131 is sleeved on the outer surface of the limiting ring 12 and abuts against the inner surface of the clamping ring 13 to achieve sealing. When the connecting flange 14 is rotated, the clamping ring 13 is controlled to rotate on the outer surface of the limiting ring 12; further, the second sealing gasket 131 is tightly sleeved on the outer surface of the limiting ring 12 and abuts against the inner surface of the clamping ring 13, forming a stable and reliable seal, ensuring that during the long-term operation of the pipeline system, it can effectively prevent medium leakage.

[0033] In a preferred embodiment, interlayer 11 is made of rubber. The outer tube structure 9, inner tube structure 10, and interlayer 11 form a multi-layered corrugated expansion structure. Furthermore, the rubber interlayer 11 exhibits excellent elasticity. When the pipeline is subjected to external impact or sudden changes in internal pressure, the rubber interlayer 11 can be compressed or stretched. The outer tube structure 9 and inner tube structure 10 provide support for the outer and inner layers, preventing contact between the inner and outer tubes, and working in conjunction with interlayer 11.

[0034] The working process of the utility model is as follows: first, when the pipeline system starts to operate, the discharge ports 3 in the four directions of the multi-directional structure 1 can be connected to the external pipeline, and then enter the reversing spherical plug 5 in the plug cavity 2. Since the reversing spherical plug 5 is in the initial position, it will enter the medium channel 6 in the reversing spherical plug 5. By rotating the steering wheel 8, the connecting rod 7 rotates and drives the reversing spherical plug 5 to rotate in the plug cavity 2, thereby changing the conduction direction of the medium channel 6, so that the medium can flow to different discharge ports 3 as needed. Since the inner diameter of the medium channel 6 is smaller than the inner diameter of the first sealing gasket 4, which is smaller than the inner diameter of the discharge port 3, The inner diameter of the first sealing gasket 4 is tightly against the inner surface of the discharge port 3. During the process of switching the flow direction of the reversing spherical plug 5, the first sealing gasket 4 made of silicone material effectively prevents the medium from leaking from the contact part between the reversing spherical plug 5 and the discharge port 3 by virtue of its good elasticity and sealing performance, ensuring that the medium can only flow out from the selected discharge port 3 according to the predetermined path and enter the connected pipeline. When the pipeline is subjected to axial and radial forces, the multi-layer corrugated expansion structure composed of the outer tube structure 9, the inner tube structure 10 and the rubber interlayer 11 connected in four directions plays a key role. The corrugated shapes of the outer tube structure 9 and the inner tube structure 10 make It has a certain ability to expand and contract. The rubber interlayer 11 not only provides additional elastic buffering, but also maintains the integrity of the structure during deformation. When axial force acts, the multi-layer corrugated expansion structure in the multi-directional structure 1 expands and contracts in the axial direction like a spring, absorbing and dispersing the axial force. When subjected to radial force, the outer tube structure 9 is first deformed by force, and the pressure is transmitted to the rubber interlayer 11. The rubber interlayer 11 is compressed or stretched for buffering, and the inner tube structure 10 also produces adaptive deformation accordingly, thereby collaboratively dispersing the radial force to the multi-directional structure 1 and the four sets of multi-layer corrugated expansion structures, ensuring that the pipeline system can withstand complex Stability under external force environment. When the pipeline needs to change its angle due to thermal expansion and contraction, equipment vibration or installation error, the connecting flange 14 rotates, driving the clamping ring 13 to rotate on the outer surface of the limit ring 12. The rotating structure composed of the limit ring 12 and the clamping ring 13 allows the four groups of multi-layer corrugated expansion structures to twist freely within a certain angle range, realizing angular displacement compensation, and the second sealing gasket 131 made of silicone material is sleeved on the outer surface of the limit ring 12 and abuts against the inner surface of the clamping ring 13, filling the gap between them, thereby always maintaining a sealed state during the rotation process. The above is the working principle of the multi-dimensional compensation corrugated expansion joint.

Claims

1. A multi-dimensional compensating bellows expansion joint, comprising a multi-directional structure (1), a limiting ring (12) and a retaining ring (13), characterized in that: The inner cavity of the multi-directional structure (1) is provided with a plug cavity (2), the multi-directional structure (1) is provided with discharge ports (3) on all four sides, the inner walls of the four groups of discharge ports (3) are all installed with first sealing gaskets (4), the inner cavity of the plug cavity (2) is installed with a reversing spherical plug (5), the inner cavity of the reversing spherical plug (5) is provided with a medium channel (6), the front end surface of the multi-directional structure (1) is installed with a connecting rod (7), the front end surface of the connecting rod (7) is installed with a steering wheel (8), the surfaces of the four groups of discharge ports (3) are all installed with outer tube structures (9), the inner cavity of the outer tube structure (9) is provided with an inner tube structure (10), and an interlayer (11) is provided between the outer tube structure (9) and the inner tube structure (10); The limiting ring (12) is welded to one end of the outer tube structure (9) and the inner tube structure (10) away from the multi-directional structure (1); the clamping ring (13) is arranged on the outer surface of the limiting ring (12); a second sealing gasket (131) is installed between the limiting ring (12) and the clamping ring (13); and a connecting flange (14) is welded to one end of the limiting ring (12) away from the outer tube structure (9).

2. The multi-dimensional compensation bellows expansion joint according to claim 1, characterized in that: The plug cavity (2) is connected to the four groups of discharge ports (3), the inner diameter of the medium channel (6) is smaller than the inner diameter of the first sealing gasket (4), the inner diameter of the first sealing gasket (4) is smaller than the inner diameter of the discharge port (3), and the outer surface of the first sealing gasket (4) abuts against the inner surface of the discharge port (3).

3. The multi-dimensional compensation bellows expansion joint according to claim 1, characterized in that: The outer surface of the reversing spherical plug (5) abuts against one side of the first sealing gasket (4), and both the first sealing gasket (4) and the second sealing gasket (131) are made of silicone material.

4. The multi-dimensional compensation bellows expansion joint according to claim 3, characterized in that: The connecting rod (7) passes through the multi-directional structure (1) and is connected to the reversing spherical plug (5). The steering wheel (8) is rotated to change the angle of the connecting rod (7) body, and the connecting rod (7) is controlled to adjust the rotation angle of the reversing spherical plug (5).

5. The multi-dimensional compensation bellows expansion joint according to claim 3, characterized in that: The second sealing gasket (131) is sleeved on the outer surface of the limiting ring (12) and abuts against the inner surface of the clamping ring (13) to achieve sealing. When the connecting flange (14) is rotated, the clamping ring (13) is controlled to rotate on the outer surface of the limiting ring (12).

6. The multi-dimensional compensation bellows expansion joint according to claim 1, characterized in that: The material of the interlayer (11) is rubber, and the outer tube structure (9), the inner tube structure (10) and the interlayer (11) form a multi-layer corrugated expansion structure.

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