Single universal hinge type expansion joint
By using the first ring wall of the planar structure to fit the support arm in the single-type universal hinge expansion joint, the second ring wall of the arc-surface structure is coaxially arranged with the corrugated pipe, the interference problem between the universal ring and the hinge plate is solved, the stiffness and operating stability are improved, and gapless rotation and uniform stress are achieved.
Patent Information
- Application Number
- CN202421732662.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-22
AI Technical Summary
During the compensation process of the existing single-type universal hinge expansion joint, the universal ring and the hinge plate are prone to interference, and the operator needs to reserve gaps based on experience, resulting in unstable torque or interference and insufficient stiffness.
A single-type universal hinge expansion joint is designed, and the first ring wall of the planar structure is fitted with the support arm, and the second ring wall of the arc structure is arranged coaxially with the corrugated tube. The arc radius is greater than the peak radius of the corrugated tube. The support arm and the universal ring rotate around the pin axis to avoid interference and improve stiffness.
It realizes that there is no need to reserve a gap between the universal ring and the support arm, avoids interference, enhances the strength and flexibility of the universal ring, and ensures the stability and simplicity of the operation of the expansion joint.
Smart Images
Figure CN223153121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bellows expansion joints, in particular to a single universal hinge type expansion joint. Background Technique
[0002] An expansion joint is a device used to absorb the dimensional changes of pipelines or equipment caused by reasons such as thermal expansion and contraction. It can usually absorb three types of displacements, namely axial, lateral, and angular displacements, or their combinations. There are many types of expansion joints. Some advantages of articulated expansion joints are compact size and structural rigidity. By using these individual units, the thermal expansion of irregular and complex pipeline configurations can usually be compensated. Since the hinge structure has the ability to transfer loads, the pipeline system containing hinge expansion joints exerts the least force on the pipe fixed pipe supports. Such systems can actually be supported at any point without interfering with the free movement of the system. Hinge type expansion joints are divided into planar type and universal type. Since the universal type is not limited to a single-plane system and can achieve greater flexibility, it has been extremely widely used.
[0003] The single universal hinge type expansion joint given in the current standard GB / T12777-2019 is as Figure 3 shown, where the existing universal ring is circular. During the process of the expansion joint compensating for angular displacement, the hinge plate and the existing universal ring will rotate relative to the existing pin shaft. To ensure that the lower hinge plate does not interfere with the inner wall of the existing universal ring during the rotation process, a certain gap a needs to be reserved. However, in the actual operation process, the size of the gap a often needs to be judged according to the experience of the operator. If the reserved gap is too large, an additional moment will be generated, and if the gap is too small, it is easy to interfere with the inner wall of the existing universal ring. To solve this problem, a square universal ring is sometimes selected, but the stiffness of the square universal ring is poor.
[0004] Therefore, this application provides a single universal hinge type expansion joint. Content of the Utility Model
[0005] (1) Technical Problems to be Solved
[0006] In view of the above-mentioned disadvantages and deficiencies of the prior art, the utility model provides a single universal hinge type expansion joint, which solves the technical problems of the prior art.
[0007] (2) Technical Solutions
[0008] To achieve the above purpose, the main technical solutions adopted by the utility model include:
[0009] A single universal hinge type expansion joint of the present utility model includes: a corrugated pipe; end pipe assemblies disposed at both ends of the corrugated pipe and connected to the corrugated pipe; support arms disposed on the side walls of the end pipe assemblies and connected to the side walls of the end pipe assemblies; a universal ring sleeved outside the corrugated pipe and connected to the support arms, and the universal ring includes a first ring wall and a second ring wall, and the first ring wall is connected to the second ring wall; wherein, the first ring wall is a planar structure and fits with the support wall; the second ring wall is a curved surface structure, the arc radius of the curved surface structure is greater than the wave crest radius of the corrugated pipe, and the curved surface structure and the corrugated pipe are coaxially arranged; a pin shaft passing through the support arm and the first ring wall.
[0010] Optionally, both the first ring wall and the second ring wall are multiple, and the first ring wall and the second ring wall are alternately arranged at intervals; the number of support arms is equal to the number of the first ring walls.
[0011] Optionally, multiple first ring walls are evenly arranged at intervals in the circumferential direction of the corrugated pipe.
[0012] Optionally, along the circumferential direction of the corrugated pipe, the interval angle between every two adjacent first ring walls is 90°.
[0013] Optionally, the end pipe assembly includes: a first end pipe disposed on the first side of the corrugated pipe; a second end pipe disposed on the second side of the corrugated pipe; along the circumferential direction of the corrugated pipe, every two adjacent support arms are respectively disposed on the first end pipe and the second end pipe.
[0014] Optionally, the support arm includes: a connecting portion perpendicular to the side wall of the end pipe assembly and connected to the end pipe assembly; a supporting portion arranged parallel to the axial direction of the corrugated pipe and connected to both the connecting portion and the first ring wall; the connecting portion and the supporting portion are integrally formed and connected.
[0015] (III) Beneficial effects
[0016] The beneficial effects of the present utility model are:
[0017] The utility model provides a single universal hinge type expansion joint. By arranging a support arm on the side wall of the end pipe assembly and setting the first ring wall of the universal ring as a planar structure, the first ring wall is fitted with the support arm. The second ring wall is an arc surface structure, the arc radius of the arc surface structure is greater than the wave crest radius of the corrugated pipe, and the arc surface structure and the corrugated pipe are coaxially arranged. With such a setting, during the process of the expansion joint compensating for angular displacement, when the support arm and the universal ring rotate relative to each other with the pin shaft as the center, on the one hand, the fitting between the first ring wall and the support wall ensures that there is no interference between the universal ring and the support arm. On the other hand, since the second ring wall is an arc surface structure, the arc radius of the arc surface structure is greater than the wave crest radius of the corrugated pipe, and the arc surface structure and the corrugated pipe are coaxially arranged, which ensures that there is no interference between the universal ring and the corrugated pipe. Furthermore, it is no longer necessary for the operator to reserve a certain gap, and the arc-shaped structure has higher strength compared to the square universal ring. Brief Description of the Drawings
[0018] Figure 1 is a schematic diagram of the overall structure of the single universal hinge type expansion joint of the present utility model;
[0019] Figure 2 is at Figure 1 a schematic diagram of the cross-section at A-A;
[0020] Figure 3 is a schematic diagram of the connection between the hinge plate and the universal ring in the prior art.
[0021]
Description of the Reference Numerals
[0022] 1. Corrugated pipe; 2. End pipe assembly; 3. Support arm; 4. Universal ring; 5. First ring wall; 6. Second ring wall; 7. Pin shaft; 8. First end pipe; 9. Second end pipe; 10. Connection part; 11. Support part; 12. Existing pin shaft; 13. Existing universal ring; 14. Hinge plate. Detailed Embodiment
[0023] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below with reference to the drawings through specific embodiments.
[0024] This embodiment provides a single universal hinge type expansion joint, as shown in Figure 1 and Figure 2As shown in the figure, it includes: a corrugated pipe; end pipe assemblies disposed at both ends of the corrugated pipe and connected to the corrugated pipe; support arms disposed on the side walls of the end pipe assemblies and connected to the side walls of the end pipe assemblies; a universal ring sleeved outside the corrugated pipe and connected to the support arms, and the universal ring includes a first ring wall and a second ring wall, and the first ring wall is connected to the second ring wall; wherein, the first ring wall is a planar structure and fits with the support wall; the second ring wall is an arc surface structure, the arc radius of the arc surface structure is greater than the wave crest radius of the corrugated pipe, and the arc surface structure is coaxially arranged with the corrugated pipe; a pin shaft passing through the support arm and the first ring wall.
[0025] In the single universal hinge type expansion joint of this embodiment, by arranging support arms on the side walls of the end pipe assemblies and setting the first ring wall of the universal ring as a planar structure, the first ring wall fits with the support arms. The second ring wall is an arc surface structure, and the radian of the arc surface structure is the same as that of the corrugated pipe. With such a setting, during the process of the expansion joint compensating for angular displacement, when the support arms and the universal ring rotate relative to each other with the pin shaft as the center, on the one hand, the fitting between the first ring wall and the support wall ensures that there is no interference between the universal ring and the support arms. On the other hand, since the second ring wall is an arc surface structure, the arc radius of the arc surface structure is greater than the wave crest radius of the corrugated pipe, and the arc surface structure is coaxially arranged with the corrugated pipe, it ensures that there is no interference between the universal ring and the corrugated pipe. Furthermore, it is no longer necessary for the operator to reserve a certain gap, and the arc-shaped structure has higher strength compared to the square universal ring.
[0026] In this embodiment, the pin shaft and the support arm are spot welded and fixed after assembly, which is simple to operate, practical and reliable.
[0027] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more clear and thorough understanding of the present invention and to be able to convey the scope of the present invention completely to those skilled in the art.
[0028] Embodiment:
[0029] An embodiment of the present invention provides a single universal hinge type expansion joint, as Figure 2 shown, further including that both the first ring wall 5 and the second ring wall 6 are multiple, and the first ring wall 5 and the second ring wall 6 are alternately arranged at intervals; the number of support arms 3 is equal to the number of the first ring wall 5.
[0030] Exemplarily, there are 4 first annular walls 5 and also 4 second annular walls 6. Both ends of each first annular wall 5 are connected to the second annular wall 6, and both ends of each second annular wall 6 are connected to the first annular wall 5. Moreover, the number of support arms 3 is equal to the number of first annular walls 5, which facilitates the connection between the first annular wall 5 and the support arm 3. In this way, by alternately arranging the first annular wall 5 and the second annular wall 6, the overall connection of the universal ring 4 is made more firm. And during the process of the expansion joint compensating for angular displacement, when the support arm 3 and the universal ring 4 rotate relative to the pin shaft 7, the force on the universal ring 4 is more uniform.
[0031] In a possible embodiment, as Figure 2 shown, a plurality of first annular walls 5 are evenly spaced in the circumferential direction of the bellows 1.
[0032] Exemplarily, the number of first annular walls 5 is 4. The 4 first annular walls 5 are evenly spaced in the circumferential direction of the bellows 1. In this case, second annular walls 6 are arranged at both ends of the first annular wall 5, and first annular walls 5 are arranged at both ends of the second annular wall 6. Since the plurality of first annular walls 5 are evenly spaced, the angular interval between every two adjacent first annular walls 5 is the same. Then, when the universal ring 4 rotates, the support arm 3 and the first annular wall 5 of the universal ring 4 will neither interfere with each other, and the force on the universal ring 4 is uniform, ensuring the flexibility and application performance of this single universal hinge type expansion joint.
[0033] In a possible embodiment, as Figure 2 shown, along the circumferential direction of the bellows 1, the angular interval between every two adjacent first annular walls 5 is 90°.
[0034] Exemplarily, the number of first annular walls 5 is 4. The 4 first annular walls 5 are evenly spaced in the circumferential direction of the bellows 1, and along the circumferential direction of the bellows 1, the angular interval between every two adjacent first annular walls 5 is 90°. In this case, second annular walls 6 are arranged at both ends of the first annular wall 5, and first annular walls 5 are arranged at both ends of the second annular wall 6. Since the plurality of first annular walls 5 are all spaced 90°, the angular interval between every two adjacent first annular walls 5 is the same. Then, when the universal ring 4 rotates, the support arm 3 and the first annular wall 5 of the universal ring 4 will neither interfere with each other, and the force on the universal ring 4 is uniform, ensuring the flexibility and application performance of this single universal hinge type expansion joint.
[0035] In a possible embodiment, as Figure 1 and Figure 2 shown, the end pipe assembly 2 includes: a first end pipe 8 arranged on the first side of the bellows 1; a second end pipe 9 arranged on the second side of the bellows 1; along the circumferential direction of the bellows 1, every two adjacent support arms 3 are respectively arranged on the first end pipe 8 and the second end pipe 9.
[0036] Exemplarily, as Figure 2 shown, the gimbal ring 4 is provided with 4 first ring walls 5, namely the upper first ring wall 5, the lower first ring wall 5, the left first ring wall 5 and the right first ring wall 5. 4 support arms 3 are correspondingly arranged on the 4 first ring walls 5. The upper first ring wall 5 and the lower first ring wall 5 are arranged on the first end pipe 8, and the left first ring wall 5 and the right first ring wall 5 are arranged on the second end pipe 9. With such an arrangement, when the gimbal ring 4 rotates, the forces transmitted from the pipeline to the gimbal ring 4 are respectively transmitted to the support arms 3 through the first end pipe 8 and then from the support arms 3 to the gimbal ring 4, and through the second end pipe 9 to the support arms 3 and then from the support arms 3 to the gimbal ring 4. In this way, the force on the gimbal ring 4 is more uniform.
[0037] Exemplarily, as Figure 2 shown, the gimbal ring 4 is provided with 4 first ring walls 5, namely the upper first ring wall 5, the lower first ring wall 5, the left first ring wall 5 and the right first ring wall 5. 4 support arms 3 are correspondingly arranged on the 4 first ring walls 5. The upper first ring wall 5 and the lower first ring wall 5 are arranged on the second end pipe 9, and the left first ring wall 5 and the right first ring wall 5 are arranged on the first end pipe 8. With such an arrangement, when the gimbal ring 4 rotates, the forces transmitted from the pipeline to the gimbal ring 4 are respectively transmitted to the support arms 3 through the first end pipe 8 and then from the support arms 3 to the gimbal ring 4, and through the second end pipe 9 to the support arms 3 and then from the support arms 3 to the gimbal ring 4. In this way, the force on the gimbal ring 4 is more uniform.
[0038] In a possible embodiment, as Figure 1 shown, the support arm 3 includes: a connecting portion 10, perpendicular to the side wall of the end pipe assembly 2 and connected to the end pipe assembly 2; a supporting portion 11, arranged parallel to the axial direction of the corrugated pipe 1 and connected to both the connecting portion 10 and the first ring wall 5; the connecting portion 10 and the supporting portion 11 are integrally formed.
[0039] Exemplarily, the connecting portion 10 is perpendicularly welded to the side wall of the end pipe assembly 2. That is, when the support arm 3 is connected to the first end pipe 8, the connecting portion 10 is perpendicularly welded to the side wall of the first end pipe 8, and when the support arm 3 is connected to the second end pipe 9, the connecting portion 10 is perpendicularly welded to the side wall of the second end pipe 9.
[0040] Exemplarily, one end of the supporting portion 11 is integrally formed with the connecting portion 10. Specifically, it is manufactured by integrally bending a channel steel. The support arm 3 manufactured in this way has a stronger bearing capacity, better bending resistance, less welding work than the existing resistance welding structure of a vertical plate connecting a hinge plate. And after the pin shaft 7 is assembled with the support arm 3, only spot welding is required for fixing. The assembly process is simple, and the product is durable and reliable.
[0041] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0042] In the present utility model, unless otherwise clearly specified and defined, when the first feature is "on" or "under" the second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0043] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.
Claims
1. A single universal hinge type expansion joint, characterized in that, Comprising: Bellows; End pipe assemblies, disposed at both ends of the bellows and connected to the bellows; Support arms, disposed on the side walls of the end pipe assemblies and connected to the side walls of the end pipe assemblies; Universal rings, sleeved outside the bellows and connected to the support arms, and the universal rings include a first ring wall and a second ring wall, and the first ring wall is connected to the second ring wall; Wherein, the first ring wall is a planar structure and is in contact with the support arm; The second ring wall is an arc surface structure, the arc radius of the arc surface structure is greater than the wave crest radius of the bellows, and the arc surface structure is coaxially arranged with the bellows; Pin shafts, passing through the support arms and the first ring wall.
2. The single universal hinge type expansion joint according to claim 1, wherein: Both the first ring wall and the second ring wall are multiple, and the first ring wall and the second ring wall are alternately arranged at intervals; The number of the support arms is equal to the number of the first ring walls.
3. The single universal hinge type expansion joint according to claim 2, wherein: The multiple first ring walls are evenly spaced in the circumferential direction of the bellows.
4. The single universal hinge type expansion joint according to claim 3, wherein: In the circumferential direction of the bellows, the interval angle between every two adjacent first ring walls is 90°.
5. The single universal hinge type expansion joint according to claim 4, characterized in that, The end pipe assembly includes: A first end pipe, disposed on the first side of the bellows; A second end pipe, disposed on the second side of the bellows; In the circumferential direction of the bellows, every two adjacent support arms are respectively disposed on the first end pipe and the second end pipe.
6. The single universal hinge type expansion joint according to any one of claims 1 to 5, characterized in that, The support arm includes: A connecting portion, perpendicular to the side wall of the end pipe assembly and connected to the end pipe assembly; A supporting portion, arranged parallel to the axial direction of the bellows and connected to the connecting portion and the first ring wall; The connecting portion and the supporting portion are integrally formed and connected.