A damping expansion joint for heating and hot water pipelines

Abstract

The utility model relates to the technical field of expansion joint, specifically relates to a shock absorption expansion joint for heat supply and heating pipeline, both sides of one of two connecting plates are fixedly connected with side frame, and the inside of two side frames is equipped with inner plate, and one end of two inner plates is fixedly connected with the both sides of another connecting plate respectively, fixedly connected with telescopic link between two supporting plates, and the telescopic link is equipped with extrusion spring, and the both ends of extrusion spring are fixedly connected with the side of two supporting plates respectively, through setting up the structure of expansion joint pipe and extrusion spring cooperation effect between two connecting plates, the active buffering mechanism is increased on the basis of traditional bellows or rubber spare, can provide stable elastic support when the pipeline system is heated expansion or contraction, effectively absorbs high frequency vibration, pressure fluctuation and thermal stress impact, avoids the fatigue damage and sealing failure caused by rigid connection, reaches the effect of improving shock absorption effect and structural stability.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, and in particular to a shock-absorbing expansion joint for heating pipelines. Background Technology

[0002] Vibration-damping expansion joints for heating pipelines are crucial functional components in heating systems, used to connect different pipe sections, absorb thermal displacement, mitigate vibration, and compensate for installation errors. They are widely used in projects such as district heating, urban heating, and industrial steam transmission. Their performance directly affects the operational stability, sealing reliability, and safe lifespan of the entire heating network. Especially when dealing with axial, lateral, or angular displacements in pipelines caused by temperature changes, vibration-damping expansion joints play an irreplaceable role.

[0003] Utility model patent CN208123724U discloses a simple expansion joint, including an expansion joint body one, an expansion joint body two, a screw assembly, and a special sealing ring. The right end of the expansion joint body one has an inner groove one, and the left end of the expansion joint body two has an inner groove two. The special sealing ring has a sealing gasket in the middle and embedded sealing rings at both ends. During assembly, the special sealing ring is embedded into the two inner grooves respectively. The screw assembly passes through the flange hole and is locked and fixed by a nut. This expansion joint adopts an axially connected sealing ring integral elastic deformation sealing method. It has a simple structure, is easy to install and disassemble, and can play a certain buffering role for thermal expansion and contraction. It is suitable for applications such as boilers.

[0004] However, existing shock-absorbing expansion joints for heating pipelines are insufficient in terms of buffering and vibration reduction, especially when facing high-frequency vibrations, pressure fluctuations, or complex multidimensional displacements. The structure of traditional expansion joints is unable to effectively absorb mechanical stresses from all directions of the pipeline system, leading to fatigue damage, sealing failure, or even leakage at the connection points. In addition, some expansion joints rely solely on a single bellows or rubber component for vibration reduction compensation, lacking a multi-stage vibration reduction mechanism. During long-term operation, they are prone to aging, cracking, or deformation, affecting their service life and safety. More seriously, these problems not only significantly increase the operation and maintenance costs and failure rate of the pipeline system, but may also cause safety accidents, threatening the safety of personnel and equipment, and restricting the efficient and stable operation of the heating system. Therefore, there is an urgent need for a shock-absorbing expansion joint for heating pipelines to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a shock-absorbing expansion joint for heating and heating pipelines, which solves the problem that existing shock-absorbing expansion joints for heating and heating pipelines are insufficient in terms of buffering and shock absorption. In particular, when facing high-frequency vibration, pressure fluctuations or complex multidimensional displacement, the structure of traditional expansion joints is difficult to effectively absorb mechanical stress from all directions of the pipeline system, which leads to fatigue damage, sealing failure or even leakage at the connection parts.

[0006] To achieve the above objectives, this utility model provides a shock-absorbing expansion joint for heating pipes, including connecting plates, and two connecting plates are provided. An expansion joint pipe is fixedly connected between the two connecting plates, and a support plate is fixedly connected to one side of the top of each of the two connecting plates.

[0007] One of the two connecting plates has side frames fixedly connected to both sides, and the inner sides of both side frames are provided with inner plates. One end of each inner plate is fixedly connected to both sides of the other connecting plate. A telescopic rod is fixedly connected between the two support plates, and a compression spring is sleeved on the telescopic rod. The two ends of the compression spring are fixedly connected to one side of each of the two support plates. One of the two connecting plates has a bottom frame fixedly connected to both sides, and the other connecting plate has a fixing plate fixedly connected to both sides. A bearing plate is slidably connected to the inner sides of both bottom frames, and a support rod is fixedly connected to one side of the bearing plate. One end of the support rod is fixedly connected to one side of the fixing plate.

[0008] In this connection, one of the two connecting plates has a first inclined plate fixedly connected to both sides of its top, and the other connecting plate has a second inclined plate fixedly connected to both sides of its top, with the two first inclined plates passing through the two second inclined plates respectively.

[0009] Each of the two second inclined plates has a limit plate fixedly connected to one end, and the two ends of the expansion joint tube pass through the two connecting plates respectively.

[0010] Each of the two support plates has a slider fixedly connected to both sides, and all four sliders are slidably connected to the inner walls of the two base frames through grooves.

[0011] Water bags are provided on the inner sides of the two bottom frames, and the side of the water bag away from the bearing plate is fixedly connected to the inner wall of the bottom frame.

[0012] Each of the two inner panels is fixedly connected to a damping plate at one end of the inner side of the two side frames, and the damping plate is in contact with the inner wall of the side frame.

[0013] This utility model discloses a vibration-damping expansion joint for heating pipelines. By incorporating an expansion joint pipe and a compression spring between two connecting plates, it adds an active buffering mechanism to the traditional corrugated pipe or rubber component. This provides stable elastic support when the pipeline system expands or contracts due to heat, effectively absorbing high-frequency vibrations, pressure fluctuations, and thermal stress impacts. It avoids fatigue damage and sealing failure caused by rigid connections, thus improving vibration damping and structural stability. An auxiliary compensation mechanism composed of side frames, inner plates, bottom frames, load-bearing plates, support rods, and fixing plates constructs a multi-dimensional vibration damping system. When dealing with complex conditions such as lateral displacement and angular deflection of the pipeline, it can achieve adaptive adjustment through a sliding fit structure, reducing vibration... The reduced stress concentration in the main expansion joint pipe extends its service life and improves safety. Furthermore, the combined design of the telescopic rod and compression spring not only enhances axial buffering capacity but also provides excellent reset performance, allowing the expansion joint to maintain good working condition even after multiple thermal cycles, thus improving the long-term reliability of the equipment. In addition, the support plate, base frame, and other structures are fixed to the connecting plate by welding or bolting, facilitating on-site assembly, disassembly, and replacement, improving the maintainability of the equipment. Finally, the overall expansion joint structure has a reasonable layout, with coordinated cooperation between components. It retains the basic functions of traditional expansion joints while strengthening vibration damping and compensation capabilities, making it more suitable for heating network systems under complex conditions such as high temperature, high pressure, and frequent start-stop operations. It surpasses existing technologies in terms of vibration damping performance, multi-dimensional compensation capability, structural stability, and ease of operation and maintenance. It effectively addresses the shortcomings of traditional expansion joints, such as weak buffering capacity, susceptibility to aging and deformation, and short lifespan, providing enterprises with a highly reliable, long-life, and adaptable vibration damping and compensation solution, contributing to the safe, efficient, and stable operation of heating systems. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

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

[0016] Figure 2 This is a top view of an embodiment of the present invention.

[0017] Figure 3 This is a side view structural diagram of an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the left-side structure of an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the damping plate structure according to an embodiment of the present invention.

[0020] 1. Connecting plate; 2. Expansion joint tube; 3. Side frame; 4. Inner plate; 5. Bottom frame; 6. Water bag; 7. Bearing plate; 8. Slider; 9. Slide groove; 10. Fixing plate; 11. Support rod; 12. First inclined plate; 13. Second inclined plate; 14. Limiting plate; 15. Support plate; 16. Telescopic rod; 17. Compression spring; 18. Damping plate. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figure 1-5 .

[0023] A shock-absorbing expansion joint for heating pipes includes a connecting plate 1, and two connecting plates 1 are provided. An expansion joint pipe 2 is fixedly connected between the two connecting plates 1, and a support plate 15 is fixedly connected to one side of the top of each of the two connecting plates 1.

[0024] One of the two connecting plates 1 has a side frame 3 fixedly connected to both sides, and the inner side of each side frame 3 is provided with an inner plate 4. One end of each inner plate 4 is fixedly connected to both sides of the other connecting plate 1. A telescopic rod 16 is fixedly connected between the two support plates 15, and a compression spring 17 is sleeved on the telescopic rod 16. The two ends of the compression spring 17 are fixedly connected to one side of each support plate 15. One of the two connecting plates 1 has a bottom frame 5 fixedly connected to both sides, and the other connecting plate 1 has a fixed plate 10 fixedly connected to both sides. The inner side of each bottom frame 5 is slidably connected with a bearing plate 7, and a support rod 11 is fixedly connected to one side of the bearing plate 7. One end of the support rod 11 is fixedly connected to one side of the fixed plate 10.

[0025] When the shock-absorbing expansion joint is installed in the heating pipeline system, the two connecting plates 1 are respectively connected to the flanges of adjacent pipe sections, serving as the fixed and movable ends of the overall structure. The two connecting plates 1 are connected by an expansion joint pipe 2 to absorb axial expansion and contraction displacement caused by temperature changes, while simultaneously allowing media flow. To enhance the overall shock absorption and buffering performance, side frames 3 are fixedly connected to both sides of one of the two connecting plates 1. Each side frame 3 has an inner plate 4, and one end of the inner plate 4 extends and is fixedly connected to the corresponding side of the other connecting plate 1, thus forming a lateral limiting and support structure, ensuring that the connecting plate 1 remains stably guided when thermal displacement occurs. In addition, a telescopic rod 16 is provided between the support plates 15 fixedly connected to one side of the top of the two connecting plates 1. A compression spring 17 is sleeved on the telescopic rod 16, and its two ends are respectively connected to the two support plates 1. One side of the expansion joint is fixedly connected, allowing it to generate an elastic reaction force through the compression spring 17 when subjected to axial compression or tension, effectively buffering thermal stress and mechanical vibration from the pipeline system. Simultaneously, a base frame 5 is fixedly installed on both sides of one of the two connecting plates 1, and a fixing plate 10 is fixedly installed on the corresponding connecting plate 1 on the other side. A bearing plate 7 is slidably connected inside each base frame 5. A support rod 11 is fixedly connected to one side of the bearing plate 7, and the other end of the support rod 11 is fixedly connected to one side of the fixing plate 10. This structure forms a multi-point support and sliding compensation mechanism. When the pipeline experiences lateral or angular displacement, the support rod 11 can slide and adjust between the base frame 5 and the fixing plate 10, further enhancing the expansion joint's adaptability to complex displacements and sharing the stress load borne by the main expansion joint pipe 2, ensuring the overall operational stability and sealing.

[0026] Furthermore, one of the two connecting plates 1 has a first inclined plate 12 fixedly connected to both sides of its top, and the other connecting plate 1 has a second inclined plate 13 fixedly connected to both sides of its top. The two first inclined plates 12 pass through the two second inclined plates 13 respectively. When the expansion joint undergoes axial expansion or angular displacement, the first inclined plate 12 and the second inclined plate 13 form an interlaced sliding structure, which provides guiding support for the connecting plate 1 and enhances the stability and bending resistance of the overall structure under complex displacement conditions, thereby improving the multidimensional adaptability and operational reliability of the expansion joint.

[0027] Furthermore, a limiting plate 14 is fixedly connected to one end of each of the two second inclined plates 13. The two ends of the expansion joint pipe 2 pass through the two connecting plates 1 respectively. When the expansion joint is subjected to a large tensile or compressive force, the limiting plate 14 can physically limit the relative displacement between the connecting plates 1, preventing the expansion joint pipe 2 from deforming and failing due to excessive stretching or compression. At the same time, the design of the expansion joint pipe 2 passing through the connecting plate 1 enhances the sealing performance and structural integrity of the medium flow, avoids the leakage risk that may occur in traditional flange connections, and achieves the effect of enhancing the limiting protection and sealing stability.

[0028] Furthermore, sliders 8 are fixedly connected to both sides of the two bearing plates 7, and the four sliders 8 are slidably connected to the inner walls of the two bottom frames 5 through the sliding grooves 9 respectively. When the pipeline system undergoes lateral or angular displacement, the support rod 11 drives the bearing plate 7 to slide along the sliding groove 9 in the bottom frame 5. The sliders 8 and the sliding grooves 9 cooperate to realize the stable guiding movement of the bearing plate 7, preventing it from jamming or deviating during the sliding process. This improves the sliding accuracy and structural response speed between the support rod 11 and the bottom frame 5, and achieves the effect of enhancing the smooth operation and guiding accuracy of the sliding compensation mechanism.

[0029] Furthermore, water bags 6 are provided on the inner sides of the two bottom frames 5, and the side of the water bag 6 away from the bearing plate 7 is fixedly connected to the inner wall of the bottom frame 5. During the operation of the expansion joint, the water bag 6, as an auxiliary shock-absorbing element, can generate a certain elastic buffering effect when the support rod 11 slides, absorb the low-frequency vibration energy from the pipeline system, and reduce the impact of mechanical impact on the main expansion joint pipe 2. At the same time, the water bag 6 has good resilience and thermal stability, and can maintain structural integrity and functional stability in high-temperature environments, thereby achieving the effect of enhancing shock absorption performance and system safety.

[0030] Furthermore, damping plates 18 are fixedly connected to one end of each of the two inner plates 4 located inside the two side frames 3, and the damping plates 18 are in contact with the inner wall of the side frame 3. When the connecting plate 1 undergoes axial or lateral displacement, frictional resistance is generated between the damping plates 18 and the side frame 3, forming a controllable damping effect, which effectively suppresses the transmission of high-frequency vibration and prevents fatigue damage caused by structural resonance. This not only improves the overall dynamic stability of the expansion joint, but also extends the service life of the equipment under complex working conditions, achieving the effect of enhancing shock absorption and buffering capacity and structural durability.

[0031] In summary:

[0032] When the shock-absorbing expansion joint is installed in the heating pipe network system, the two connecting plates 1 are fixedly connected to the adjacent pipe sections through flanges. One serves as the fixed end and the other as the movable end. The medium flows between them through the expansion joint pipe 2, while absorbing axial thermal displacement caused by temperature changes. To enhance the overall buffering and shock absorption capacity, side frames 3 are fixedly installed on both sides of one of the two connecting plates 1. Each side frame 3 has an inner plate 4 inside, and one end of the inner plate 4 extends and is fixedly connected to the corresponding part of the other connecting plate 1, thus forming a lateral guide structure. This ensures that the connecting plate 1 maintains good alignment and guiding stability when it expands, contracts, or deflects. At the same time, on one side of the top of the two connecting plates 1... Telescopic rods 16 are provided between the fixedly connected support plates 15. A compression spring 17 is fitted onto the telescopic rod 16, with both ends fixedly connected to one side of each of the two support plates 15. This allows the expansion joint to generate an elastic reaction force through the compression spring 17 when subjected to axial tension or compression, effectively absorbing thermal stress and mechanical vibration energy from the pipeline system. Furthermore, a bottom frame 5 is provided on both sides of one of the two connecting plates 1, and a fixed plate 10 is provided on the corresponding connecting plate 1 on the other side. A bearing plate 7 is slidably connected inside each bottom frame 5. A support rod 11 is fixedly connected to one side of the bearing plate 7, and the other end of the support rod 11 is fixedly connected to the fixed plate 10, forming a multi-point support and sliding compensation mechanism. When the pipeline undergoes lateral or angular changes... During displacement, the support rod 11 can slide and adjust between the bottom frame 5 and the fixed plate 10, further enhancing the expansion joint's adaptability to complex displacements and sharing the stress load borne by the main expansion joint tube 2, ensuring stable operation and reliable sealing. To further enhance guiding performance and limiting protection functions, a first inclined plate 12 is provided on both sides of the top of one of the two connecting plates 1, and a second inclined plate 13 is provided on both sides of the top of the other connecting plate 1, with the first inclined plate 12 penetrating through the second inclined plate 13. During the displacement of the expansion joint, the two form an interlaced sliding structure, providing auxiliary guidance and enhancing the overall bending resistance. At the same time, a limiting plate 14 is fixedly connected to one end of the two second inclined plates 13 to prevent the connecting plates 1 from moving apart. To prevent excessive displacement and avoid failure of the expansion joint tube 2 due to excessive stretching or compression, the two ends of the expansion joint tube 2 are respectively connected by two connecting plates 1, which enhances the sealing performance and structural integrity. In order to further improve the guiding accuracy of the sliding compensation mechanism, sliders 8 are provided on both sides of the two bearing plates 7. The four sliders 8 are respectively slidably engaged with the inner walls of the two bottom frames 5 through the sliding grooves 9, which ensures that the bearing plates 7 move stably along the direction of the bottom frames 5 and prevents jamming or displacement. At the same time, a water bag 6 is provided on the inner side of the bottom frame 5. The side of the water bag 6 away from the bearing plate 7 is fixedly connected to the inner wall of the bottom frame 5. As an auxiliary shock absorption element, it provides elastic buffer during the sliding of the support rod 11, absorbs low-frequency vibration energy, and reduces the impact on the main expansion joint tube 2.Finally, a damping plate 18 is provided at one end of the two inner plates 4 located inside the side frame 3. The damping plate 18 is in contact with the inner wall of the side frame 3. When the connecting plate 1 undergoes relative displacement, frictional resistance is generated between the damping plate 18 and the side frame 3, forming a controllable damping effect, effectively suppressing the transmission of high-frequency vibration and preventing fatigue damage caused by resonance. By setting an expansion joint pipe 2 and a compression spring 17 working together between the two connecting plates 1, an active buffer mechanism is added to the traditional corrugated pipe or rubber parts. It can provide stable elastic support when the pipeline system expands or contracts due to heat, effectively absorbing high-frequency vibration, pressure fluctuations and thermal stress impact, avoiding fatigue damage and sealing failure caused by rigid connection, and achieving the effect of improving vibration reduction and structural stability. Secondly, in order to solve the defect of lacking a multi-stage vibration reduction mechanism, an innovative system consisting of a side frame 3, inner plate 4, bottom frame 5, bearing plate 7, support rod 11, fixed plate 10, slider 8, and sliding... The auxiliary compensation and damping mechanism, composed of groove 9, water bag 6, and damping plate 18, constructs a multi-dimensional damping and buffering system. When dealing with complex conditions such as lateral displacement and angular deflection of the pipeline, it can achieve adaptive adjustment through a sliding fit structure, reducing stress concentration in the main expansion joint pipe 2, extending its service life, and improving safety. Furthermore, the combined design of the telescopic rod 16 and the compression spring 17 not only enhances the axial buffering capacity but also possesses excellent reset performance, allowing the expansion joint to maintain good working condition after multiple thermal cycles, improving the long-term reliability of the equipment. In addition, the first inclined plate 12 and the second... The staggered sliding structure of the inclined plate 13 improves guiding performance and enhances the bending resistance and structural strength of the expansion joint under complex displacements; the setting of the limiting plate 14 effectively prevents the expansion joint tube 2 from deformation failure due to excessive stretching or compression, improving safety in use; the cooperation structure between the slider 8 and the slide groove 9 ensures the sliding accuracy and smooth operation of the bearing plate 7 within the bottom frame 5, avoiding jamming or displacement problems; the water bag 6, as an auxiliary shock absorption element, has good resilience and high-temperature stability, effectively absorbing low-frequency vibration energy and reducing the impact on the main structure; the damping plate 18 and the side frame 3... The friction between the joints creates a controllable damping effect, effectively suppressing the transmission of high-frequency vibrations and preventing structural fatigue damage caused by resonance, further enhancing the overall dynamic stability and durability of the expansion joint. In summary, this vibration-damping expansion joint for heating pipelines outperforms existing technologies in terms of vibration damping performance, multi-dimensional compensation capability, structural stability, and ease of operation and maintenance. It effectively addresses the shortcomings of traditional expansion joints, such as weak buffering capacity, susceptibility to aging and deformation, and short lifespan, providing enterprises with a highly reliable, long-life, and adaptable vibration damping compensation solution, thus contributing to the safe, efficient, and stable operation of heating systems.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A shock-absorbing expansion joint for heating pipes, comprising connecting plates, wherein two connecting plates are provided, characterized in that, It also includes an expansion joint pipe fixedly connected between two connecting plates, and a support plate fixedly connected to one side of the top of each of the two connecting plates; One of the two connecting plates has a side frame fixedly connected to both sides, and both side frames have an inner plate on their inner sides. One end of each inner plate is fixedly connected to both sides of the other connecting plate. A telescopic rod is fixedly connected between the two support plates, and a compression spring is sleeved on the telescopic rod. Both ends of the compression spring are fixedly connected to one side of each of the two support plates. One of the two connecting plates has a bottom frame fixedly connected to both sides, and the other connecting plate has a fixing plate fixedly connected to both sides. A bearing plate is slidably connected to the inner side of each of the two bottom frames, and a support rod is fixedly connected to one side of the bearing plate. One end of the support rod is fixedly connected to one side of the fixing plate.

2. The shock-absorbing expansion joint for heating pipelines as described in claim 1, characterized in that, One of the two connecting plates has a first inclined plate fixedly connected to both sides of its top, and the other connecting plate has a second inclined plate fixedly connected to both sides of its top, with the two first inclined plates passing through the two second inclined plates respectively.

3. The shock-absorbing expansion joint for heating pipelines as described in claim 2, characterized in that, Limiting plates are fixedly connected to one end of each of the two second inclined plates, and the two ends of the expansion joint tube pass through the two connecting plates respectively.

4. The shock-absorbing expansion joint for heating pipelines as described in claim 1, characterized in that, Both sides of the two support plates are fixedly connected to sliders, and the four sliders are slidably connected to the inner walls of the two bottom frames through sliding grooves.

5. The shock-absorbing expansion joint for heating pipelines as described in claim 1, characterized in that, Water bags are provided on the inner sides of the two bottom frames, and the side of the water bag away from the bearing plate is fixedly connected to the inner wall of the bottom frame.

6. The shock-absorbing expansion joint for heating pipelines as described in claim 1, characterized in that, Each of the two inner plates is fixedly connected to a damping plate at one end of the inner side of the two side frames, and the damping plate is in contact with the inner wall of the side frame.

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