Anti-seismic protective corrugated pipe assembly with axial buffer joint structure
By introducing axial buffer joints and protective structures into the bellows assembly, the problem of traditional bellows being easily damaged under axial force is solved, achieving effective protection of the bellows and improving its seismic performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-26
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional bellows assemblies lack an effective buffering mechanism when subjected to axial force, which makes the joints prone to damage and affects the stable operation of the pipeline system. In particular, maintenance costs are high in environments with strong earthquakes or vibrations.
Design a shock-resistant protective bellows assembly with an axial buffer joint structure, including an axial buffer joint and a protective structure. It utilizes a buffer spring to absorb impact energy, a limit rod to restrict displacement, and combines a metal protective mesh and a corrosion-resistant coating to enhance protection.
It effectively absorbs axial impact force, prevents joint damage, improves seismic performance, extends service life, reduces maintenance costs, and is suitable for pipeline systems under complex working conditions.
Smart Images
Figure CN224120871U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bellows technology, and in particular to a shock-resistant protective bellows assembly with an axial buffer joint structure. Background Technology
[0002] In modern industrial and infrastructure construction, corrugated pipes are widely used as an important pipeline connection and compensation element in many fields such as water supply and drainage, heating, chemical industry, and natural gas transmission. Their main function is to compensate for the displacement of pipelines caused by factors such as temperature changes, foundation settlement, and mechanical vibration, so as to ensure the safe and stable operation of the pipeline system.
[0003] However, traditional bellows assemblies still have some shortcomings under complex working conditions. In earthquake-prone areas or industrial environments with strong vibrations, pipelines are subjected to large axial and radial impact forces. Ordinary bellows joints lack an effective axial buffering mechanism. When subjected to axial tension or compression, the joint is prone to damage due to stress concentration, leading to pipeline leakage or even breakage, which seriously affects the normal operation of the system. This results in frequent fatigue failure of bellows joints, high maintenance costs, and reduced production efficiency. Therefore, an earthquake-resistant protective bellows assembly with an axial buffer joint structure is proposed to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a shock-resistant protective bellows assembly with an axial buffer joint structure to solve the problems mentioned in the background art.
[0005] To solve the above problems, the following technical solution is provided: a seismic-resistant protective bellows assembly with an axial buffer joint structure, including a bellows body, external pipes are provided on both sides of the bellows body, an axial buffer joint structure is provided between both ends of the bellows body and the external pipes, and a protective structure is provided on the outside of the bellows body.
[0006] The axial buffer joint structure includes a first connecting ring, a second connecting ring, a buffer spring, and a limiting rod. The first connecting ring is fixedly connected to one end of the bellows body, the second connecting ring is fixedly connected to an external pipe, the two ends of the buffer spring are fixedly connected to the first connecting ring and the second connecting ring respectively, one end of the limiting rod is fixedly connected to the first connecting ring, and the other end of the limiting rod passes through the second connecting ring and extends to the outside.
[0007] The protective structure includes a metal protective mesh, a buffer pad, and a corrosion-resistant coating. The metal protective mesh is fitted over the outside of the corrugated pipe body, and the buffer pad is disposed between the metal protective mesh and the corrugated pipe body.
[0008] As a preferred embodiment of the above technical solution, a limiting cap is provided at one end of the limiting rod located outside the second connecting ring. The diameter of the limiting cap is larger than the diameter of the limiting rod, and the limiting cap and one end of the limiting rod are threaded together.
[0009] As a preferred embodiment of the above technical solution, the second connecting ring has the same number of grooves as the limiting rods inside, the limiting rods are slidably inserted into the grooves, and the buffer spring is a helical compression spring made of stainless steel.
[0010] As a preferred embodiment of the above technical solution, a sealing gasket is fixedly installed on the inner wall of the second connecting ring, and the sealing gasket is tightly fitted to the external pipe.
[0011] As a preferred embodiment of the above technical solution, a sealing disc is fixedly provided on the inner side of the first connecting ring, an O-ring is fixedly provided inside the sealing disc, and a wedge-shaped sealing gasket is fitted to the outer wall of the O-ring, with the wedge-shaped sealing gasket tightly fitted to the bellows body.
[0012] As a preferred embodiment of the above technical solution, the corrosion-resistant coating is applied to the outer surface of the corrugated pipe body, and the corrosion-resistant coating is an epoxy resin coating.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] 1. This utility model device is equipped with an axial buffer joint structure. The impact force generated by earthquake or mechanical vibration is transmitted to the second connecting ring. The second connecting ring compresses the buffer spring. The buffer spring absorbs the impact energy through its own elastic deformation, reducing the axial stress on the bellows body and effectively protecting the bellows body from damage. The limiting rod slides within the second connecting ring. When the displacement exceeds a certain limit, the limiting cap on the limiting rod contacts the second connecting ring, limiting further displacement and preventing the buffer spring from being over-compressed or stretched and failing. This ensures that the axial buffer joint structure can continuously and effectively play a buffering role. By using the buffer spring to absorb the axial impact force and the limiting rod to limit the displacement, the seismic performance of the bellows assembly is improved, and joint damage caused by axial stress can be effectively avoided.
[0015] 2. The device of this utility model is equipped with a protective structure. The metal protective mesh resists mechanical damage, the buffer pad further reduces shock, and the corrosion-resistant coating prevents chemical corrosion, which significantly enhances the protective ability of the corrugated pipe assembly and extends its service life. It is suitable for pipeline systems under various complex working conditions.
[0016] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram of the overall structure of the shock-resistant protective bellows assembly with an axial buffer joint structure of this utility model.
[0019] Figure 2 This is a front structural diagram of the shock-resistant protective bellows assembly with an axial buffer joint structure according to this utility model.
[0020] Figure 3 for Figure 2 Diagram of the split structure;
[0021] Figure 4 for Figure 3 Schematic diagram of the local rotation structure;
[0022] Figure 5 for Figure 4 A magnified diagram of the partially disassembled structure.
[0023] In the diagram: 1. Corrugated pipe body; 2. Axial buffer joint structure; 21. First connecting ring; 22. Second connecting ring; 23. Buffer spring; 24. Limiting rod; 25. Limiting cap; 26. Sealing gasket; 27. Slide groove; 28. Sealing disc; 281. O-ring; 282. Wedge-shaped sealing gasket; 3. Protective structure; 31. Metal protective mesh; 32. Buffer pad; 33. Corrosion-resistant coating; 4. External pipe. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0025] like Figures 1 to 5 As shown, the earthquake-resistant protective bellows assembly with an axial buffer joint structure provided in this embodiment includes a bellows body 1, external pipes 4 are provided on both sides of the bellows body 1, an axial buffer joint structure 2 is provided between both ends of the bellows body 1 and the external pipes 4, and a protective structure 3 is provided on the outside of the bellows body 1.
[0026] The axial buffer joint structure 2 includes a first connecting ring 21, a second connecting ring 22, a buffer spring 23, and a limiting rod 24. The first connecting ring 21 is fixedly connected to one end of the bellows body 1, the second connecting ring 22 is fixedly connected to the external pipe 4, the two ends of the buffer spring 23 are fixedly connected to the first connecting ring 21 and the second connecting ring 22 respectively, one end of the limiting rod 24 is fixedly connected to the first connecting ring 21, and the other end of the limiting rod 24 passes through the second connecting ring 22 and extends to the outside.
[0027] The protective structure 3 includes a metal protective mesh 31, a buffer pad 32, and a corrosion-resistant coating 33. The metal protective mesh 31 is sleeved on the outside of the corrugated pipe body 1, and the buffer pad 32 is disposed between the metal protective mesh 31 and the corrugated pipe body 1.
[0028] Specifically, a limit cap 25 is provided at one end of the limit rod 24 located outside the second connecting ring 22. The diameter of the limit cap 25 is larger than the diameter of the limit rod 24, and the limit cap 25 and one end of the limit rod 24 are threaded together.
[0029] The limiting cap 25 is designed to ensure the safety and stability of the axial buffer joint structure 2. When the bellows body 1 is subjected to excessive axial tensile force, the limiting cap 25 can contact the second connecting ring 22 in time, preventing the limiting rod 24 from coming out of the second connecting ring 22, thus avoiding the loss of constraint of the buffer spring 23 and causing the joint structure to fail. This ensures that the axial buffer joint structure 2 can continuously and effectively play its buffering role.
[0030] Specifically, the second connecting ring 22 has the same number of sliding grooves 27 as the limiting rods 24 inside. The limiting rods 24 are slidably inserted into the sliding grooves 27. The buffer spring 23 is a helical compression spring and is made of stainless steel.
[0031] By adopting a helical compression spring for the buffer spring 23, which has the characteristics of compact structure and stable elastic coefficient, it can efficiently absorb and release axial impact force. The buffer spring 23 is made of stainless steel, which gives it excellent corrosion resistance. The stainless steel buffer spring 23 can resist chemical corrosion and electrochemical corrosion and maintain good elasticity and mechanical properties for a long time. A groove 27 is opened on the second connecting ring 22 to facilitate the sliding engagement of the limit rod 24 inside.
[0032] Specifically, a sealing gasket 26 is fixedly installed on the inner wall of the second connecting ring 22, and the sealing gasket 26 is tightly fitted with the external pipe 4.
[0033] By setting a sealing gasket 26, which is made of nitrile rubber with high elasticity and corrosion resistance, the sealing gasket 26 can form a tight seal with the connection between the second connecting ring 22 and the external pipe 4 during the operation of the pipeline system, whether it is transporting liquid or gas medium, to prevent medium leakage.
[0034] Specifically, a sealing disc 28 is fixedly installed on the inner side of the first connecting ring 21, an O-ring 281 is fixedly installed inside the sealing disc 28, and a wedge-shaped sealing gasket 282 is fitted to the outer wall of the O-ring 281, and the wedge-shaped sealing gasket 282 is tightly fitted to the bellows body 1.
[0035] By forming a tight seal at the connection between the first connecting ring 21 and the bellows body 1 through the O-ring 281 and the wedge-shaped sealing gasket 282 in the sealing disc 28, and since the first connecting ring 21 is fixedly connected to the bellows body 1 by argon arc welding, the wedge-shaped sealing gasket 282 and the O-ring 281 can form a seal at the connection between the two, preventing the medium from leaking from the connection between the first connecting ring 21 and the bellows body 1, thus facilitating effective sealing.
[0036] Specifically, a corrosion-resistant coating 33 is applied to the outer surface of the corrugated pipe body 1, and the corrosion-resistant coating 33 is an epoxy resin coating.
[0037] By setting a metal protective net 31, which is made of stainless steel wire mesh, the stainless steel wire mesh has high strength and good flexibility, and can effectively resist the collision and scratch of external objects on the corrugated pipe body 1. The buffer pad 32 is made of rubber pad, which has good elasticity and damping characteristics, and can effectively absorb and disperse the impact force and vibration energy transmitted to the corrugated pipe body 1 from the outside. The rubber pad can form an effective buffer layer between the metal protective net 31 and the corrugated pipe body 1.
[0038] When the metal protective mesh 31 is impacted by external forces, the rubber pad converts the impact force into heat and other forms of energy through its own elastic deformation, thereby reducing damage to the corrugated pipe body 1. The corrosion-resistant coating 33 is an epoxy resin coating. The epoxy resin coating has excellent chemical corrosion resistance, adhesion and wear resistance. It can form a strong protective film on the outer surface of the corrugated pipe body 1, effectively isolating various chemical media from contact with the corrugated pipe body 1 and preventing corrosion.
[0039] The working principle and process of this utility model: When the pipeline system is subjected to axial impact force generated by factors such as earthquake or mechanical vibration, the axial buffer joint structure 2 plays a role. The impact force is transmitted to the second connecting ring 22, the second connecting ring 22 squeezes the buffer spring 23, and the buffer spring 23 absorbs the impact energy through its own elastic deformation, thereby reducing the axial stress on the bellows body 1 and effectively protecting the bellows body 1 from damage. At the same time, the limiting rod 24 slides in the second connecting ring 22.
[0040] When the displacement exceeds a certain limit, the limit cap 25 on the limit rod 24 contacts the second connecting ring 22, limiting further displacement and preventing the buffer spring 23 from being over-compressed or stretched and failing, thereby ensuring that the axial buffer joint structure 2 can continuously and effectively play a buffering role. During the operation of the pipeline system, whether it is transporting liquid or gas medium, the sealing gasket 26 can fit tightly with the end of the external pipe 4. The sealing gasket 26 can form a seal at the connection between the second connecting ring 22 and the external pipe 4 to prevent the medium from leaking from the connection.
[0041] Meanwhile, the O-ring 281 and wedge-shaped sealing gasket 282 inside the sealing disc 28 form a tight seal at the connection between the first connecting ring 21 and the bellows body 1, preventing the medium from leaking from the connection between the first connecting ring 21 and the bellows body 1, and facilitating effective sealing.
[0042] The metal protective mesh 31 serves as the first line of defense, blocking direct impacts and scratches from external objects onto the corrugated pipe body 1, thus preventing mechanical damage. The buffer pad 32 further absorbs the impact force transmitted from the metal protective mesh 31, playing a secondary buffering role and reducing the vibration impact on the corrugated pipe body 1. The corrosion-resistant coating 33 isolates the contact between chemical media and the corrugated pipe body 1, preventing corrosion of the corrugated pipe body 1 and extending its service life.
[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
Claims
1. A seismic-resistant protective bellows assembly with an axial buffer joint structure, comprising a bellows body (1), characterized in that, External pipes (4) are provided on both sides of the corrugated pipe body (1), and axial buffer joint structures (2) are provided between both ends of the corrugated pipe body (1) and the external pipes (4). A protective structure (3) is provided on the outside of the corrugated pipe body (1). The axial buffer joint structure (2) includes a first connecting ring (21), a second connecting ring (22), a buffer spring (23), and a limiting rod (24). The first connecting ring (21) is fixedly connected to one end of the bellows body (1), the second connecting ring (22) is fixedly connected to the external pipe (4), the two ends of the buffer spring (23) are fixedly connected to the first connecting ring (21) and the second connecting ring (22) respectively, one end of the limiting rod (24) is fixedly connected to the first connecting ring (21), and the other end of the limiting rod (24) passes through the second connecting ring (22) and extends to the outside. The protective structure (3) includes a metal protective mesh (31), a buffer pad (32) and a corrosion-resistant coating (33). The metal protective mesh (31) is fitted over the outside of the corrugated pipe body (1), and the buffer pad (32) is disposed between the metal protective mesh (31) and the corrugated pipe body (1).
2. The seismic-resistant protective bellows assembly with an axial buffer joint structure according to claim 1, characterized in that, The limiting rod (24) is provided with a limiting cap (25) at one end outside the second connecting ring (22). The diameter of the limiting cap (25) is larger than the diameter of the limiting rod (24). The limiting cap (25) and the limiting rod (24) are threaded together.
3. The seismic-resistant protective bellows assembly with an axial buffer joint structure according to claim 2, characterized in that, The second connecting ring (22) has the same number of sliding grooves (27) as the limiting rod (24) inside. The limiting rod (24) is slidably inserted into the sliding groove (27). The buffer spring (23) is a helical compression spring and is made of stainless steel.
4. The seismic-resistant protective bellows assembly with an axial buffer joint structure according to claim 3, characterized in that, A sealing gasket (26) is fixedly installed on the inner wall of the second connecting ring (22), and the sealing gasket (26) is tightly fitted with the external pipe (4).
5. The seismic-resistant protective bellows assembly with an axial buffer joint structure according to claim 4, characterized in that, A sealing disc (28) is fixedly provided on the inner side of the first connecting ring (21). An O-ring (281) is fixedly provided inside the sealing disc (28). A wedge-shaped sealing gasket (282) is fitted on the outer wall of the O-ring (281). The wedge-shaped sealing gasket (282) is tightly fitted with the bellows body (1).
6. The seismic-resistant protective bellows assembly with an axial buffer joint structure according to claim 1, characterized in that, The corrosion-resistant coating (33) is applied to the outer surface of the corrugated pipe body (1), and the corrosion-resistant coating (33) is an epoxy resin coating.