Binary compensation structure for bending and elastic vectors of pipeline system

Abstract

The utility model relates to the technical field of pipelines, and provides a bending and elastic vector binary compensation structure of a pipeline system, which comprises a plurality of pipe fitting main bodies and an elastic connecting piece, the elastic connecting piece is provided with at least two connecting ends, and the connecting ends are correspondingly connected with the pipe fitting main bodies so as to be communicated with the pipe fitting main bodies; and the elastic modulus of the elastic connecting piece is smaller than that of the pipe fitting main body. The at least two pipe fitting bodies are connected through the elastic connecting piece, the elastic modulus of the elastic connecting piece is smaller than that of the pipe fitting bodies, and the elastic connecting piece can effectively absorb and release stress caused by thermal expansion and cold contraction or temperature change, so that local stress concentration and accumulation of the pipeline are avoided, local compensation is achieved, and the service life of the pipeline is prolonged. Long-term safe and stable operation of the pipeline is ensured, and whole-course maintenance-free application of the pipeline system is achieved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and in particular to a two-dimensional compensation structure for the bending elastic vector of a pipeline system. Background Technology

[0002] In various fields such as industrial production, urban water supply, and oil and gas transportation, metal pipelines serve as the primary carriers for fluid transmission, and their stability and durability directly affect the safe and efficient operation of the system. However, thermal expansion and contraction, a ubiquitous physical effect in nature, poses a significant challenge to traditional metal pipelines (including but not limited to steel pipes, stainless steel pipes, and various metal-lined plastic composite pipes). This physical phenomenon causes volume changes in the pipeline material upon temperature variations, resulting in significant expansion forces.

[0003] Thermal expansion and contraction is a key factor causing damage to metal pipes. When a piping system is heated, the expansion of the material generates enormous pressure inside the pipe. This pressure not only acts directly on the pipe wall, causing material fatigue and reduced strength, thus damaging the integrity of the pipe itself, but can also cause stress concentration and accumulation in localized areas. Over time, these high-stress areas will gradually lead to localized structural damage to the pipe, manifested as crack initiation and propagation, potentially triggering a series of serious operational accidents.

[0004] Common accident types include, but are not limited to: leaks at connections, caused by aging of sealing materials or seal failure under stress; pipe bursts, usually caused by the instantaneous rupture of pipelines under extreme pressure conditions; and damage to pipeline distribution equipment (such as valves, flow meters, etc.), which often fail due to the inability to withstand transmitted abnormal stress. These accidents not only lead to service interruptions and economic losses, but may also pose threats to the environment and personnel safety.

[0005] To address this issue, existing technologies commonly employ friction-compensation mechanisms to absorb axial displacement caused by thermal expansion and contraction of the pipeline, thereby reducing the overall stress level of the pipeline system. While these measures alleviate the expansion problem along the pipeline length to some extent, their effectiveness in resolving localized stress concentration and accumulation is limited. Utility Model Content

[0006] This invention provides a two-dimensional compensation structure for the bending and elastic vector of a pipeline system, which solves the problem of thermal expansion and contraction damaging the pipeline system structure in the prior art.

[0007] This utility model provides a two-dimensional compensation structure for the bending and elastic vector of a pipeline system, comprising: multiple pipe fitting bodies; an elastic connector having at least two connecting ends, wherein the connecting ends are correspondingly connected to the pipe fitting bodies to connect each of the pipe fitting bodies; the elastic modulus of the elastic connector is less than the elastic modulus of the pipe fitting bodies.

[0008] According to the present invention, a flexible vector binary compensation structure for a pipeline system is provided, wherein the elastic connector includes a thermoplastic part, which is disposed between the connecting end and the main body of the pipe fitting.

[0009] According to the present invention, a two-dimensional compensation structure for a pipeline system is provided, wherein the thermoplastic part is heat-fused to the corresponding connecting end and to the pipe fitting body; and / or, the thermoplastic part is electrofused to the corresponding connecting end and to the pipe fitting body.

[0010] According to the present invention, a two-dimensional compensation structure for a pipeline system is provided, wherein the connecting end is threadedly connected to the main body of the pipe fitting.

[0011] According to the present invention, a two-dimensional compensation structure for a pipeline system based on a bending and elastic vector is provided, which further includes a sealing element disposed between the connecting end and the main body of the pipe fitting.

[0012] According to the present invention, a two-dimensional compensation structure for a pipeline system is provided, wherein the elastic connectors include straight elastic connectors, tee elastic connectors, cross elastic connectors, elbow elastic connectors, and transition elastic connectors.

[0013] According to the present invention, a two-dimensional compensation structure for a pipeline system based on a bending and elastic vector is provided, which further includes a telescopic compensation device connected to the main body of the pipe fitting.

[0014] According to the present invention, a two-dimensional compensation structure for a pipeline system is provided, wherein the expansion and contraction compensation device includes a metal corrugated pipe, which is connected to the main body of the pipe fitting.

[0015] According to the present invention, a two-dimensional compensation structure for a pipeline system is provided, wherein the expansion and contraction compensation device further includes a support, and the support is provided on at least two sides of the elastic connector.

[0016] According to the present invention, a two-dimensional compensation structure for the bending and elastic vector of a pipeline system is provided, wherein the support includes a fixed support and a sliding support.

[0017] The present invention provides a two-dimensional compensation structure for the bending and elastic vector of the pipeline system. At least two pipe bodies are connected by an elastic connector. The elastic modulus of the elastic connector is less than that of the pipe body. The elastic connector can effectively absorb and release stress caused by thermal expansion and contraction or temperature changes, thereby avoiding local stress concentration and accumulation in the pipeline, achieving local compensation, ensuring long-term safe and stable operation of the pipeline, and realizing maintenance-free application of the pipeline system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is one of the two-dimensional compensation structures for the bending and elastic vector of the pipeline system provided by this utility model.

[0020] Figure 2 This is the second type of the curved elastic vector binary compensation structure for pipeline systems provided by this utility model.

[0021] Figure 3 This is the third type of the curved elastic vector binary compensation structure for pipeline systems provided by this utility model.

[0022] Figure 4 This is the fourth type of the curved elastic vector binary compensation structure for pipeline systems provided by this utility model.

[0023] Figure 5 This is the fifth type of curved elastic vector binary compensation structure for pipeline systems provided by this utility model.

[0024] Figure 6 This is the sixth type of the curved elastic vector binary compensation structure for pipeline systems provided by this utility model.

[0025] Figure label:

[0026] 1. Pipe body; 21. Straight flexible connector; 22. Tee flexible connector; 23. Elbow flexible connector; 24. Transition flexible connector; 31. Fixed bracket; 32. Sliding bracket. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0033] The following is combined Figures 1-6 This invention describes the curved elastic vector binary compensation structure of the pipeline system.

[0034] Piping systems are constructed through the effective connection of pipe fittings, ensuring the normal operation of the pipeline during the transportation of various media. However, when the temperature of the transported medium or the ambient temperature changes, the pipeline will experience thermal expansion and contraction. This expansion and contraction causes the pipeline to move axially, generating deformation stress within the pipeline structure. These stresses are transmitted to the connection areas between pipe fittings through the pipe joints. Pipe joints are often the weakest points in the piping system, bearing significant mechanical and thermal stresses; therefore, failure to effectively manage these stresses can lead to damage at the joints.

[0035] Based on this, the present invention proposes a two-dimensional compensation structure for the bending and elastic vector of a pipeline system, comprising: multiple pipe fitting bodies 1 and elastic connectors, wherein the elastic connectors have at least two connecting ends, and the connecting ends are connected to the pipe fitting bodies 1 respectively to connect each pipe fitting body 1; the elastic modulus of the elastic connectors is less than the elastic modulus of the pipe fitting bodies 1.

[0036] The elastic connector is connected to the main body of the pipe to form a symmetrical balance moment of flexural elasticity and vector rigidity (ASAK-Unit). This structural unit can effectively absorb and release the thermal expansion force along the pipe, avoid local stress concentration and accumulation, and together with the conventional pipe expansion compensation setting, it constitutes a flexural vector binary compensation, thereby realizing full-length compensation from the pipe to the local area, and solving the problem of thermal expansion force damaging the pipeline.

[0037] The elastic modulus of the flexible connector is lower than that of the pipe body 1. During thermal expansion and contraction, it can deform relatively easily, absorbing and releasing the stress generated by temperature changes in the pipe body, thus avoiding stress concentration and preventing pipe rupture. The pipe body is typically made of rigid material with a high elastic modulus, while the flexible connector has a low elastic modulus. This ensures a more uniform distribution of thermal expansion forces within the piping system, reducing the stress burden on the pipe body 1.

[0038] like Figure 1 As shown, the elastic connector is a straight-through elastic connector 21, which has two connecting ends, each of which is connected to one of the two pipe fitting bodies 1. Figure 2 and Figure 3 As shown, the elastic connector is a tee elastic connector 22, which has three connecting ends, each corresponding to one of the three pipe fitting bodies 1. In one embodiment, the elastic connector is a four-way elastic connector, which has four connecting ends, each corresponding to one of the four pipe fitting bodies 1. Figure 6 As shown, the elastic connector can be an elbow elastic connector 23, which has two connecting ends, each connecting to one of the two pipe fitting bodies 1. It should be noted that there is an included angle between the axes of the two pipe fitting bodies 1. Figure 4 and Figure 5 As shown, the elastic connector can also be a transitional elastic connector 24, which can also have two connecting ends, each of which is connected to one of the two pipe fitting bodies 1. It should be noted that there is an included angle between the axes of the two pipe fitting bodies 1, which can be 90°.

[0039] The pipeline system provided in this embodiment of the utility model has a two-dimensional compensation structure for bending and elastic vectors. At least two pipe bodies 1 are connected by elastic connectors. The elastic modulus of the elastic connectors is less than that of the pipe bodies 1. The elastic connectors can effectively absorb and release stress caused by thermal expansion and contraction or temperature changes, thereby avoiding local stress concentration and accumulation in the pipeline, realizing local compensation, ensuring long-term safe and stable operation of the pipeline, and realizing maintenance-free application of the pipeline system.

[0040] The elastic connector in this embodiment of the invention includes a thermoplastic part, which is disposed between the connecting end and the pipe body 1. The thermoplastic part is made of thermoplastic material, which can flow and deform when heated, realizing the adhesion between the connecting end and the corresponding pipe body 1. After cooling, it can maintain its shape and form a stable connection.

[0041] In the technical solution provided by this utility model, the thermoplastic part is preferably a thermoplastic elastomer, also known as thermoplastic rubber. Thermoplastic rubber is a material that combines the properties of rubber and thermoplastic plastic, with a wide hardness range and excellent tensile properties. Its tensile strength can reach up to several tens of MPa, and its elongation at break can reach more than ten times. By setting the thermoplastic part between the connecting pipe body 1 and the connecting end, the stress caused by the thermal expansion and contraction of the pipe itself can be effectively relieved, thereby improving the service life of the pipe. In addition, the thermoplastic part is connected to the corresponding connecting end and the pipe body 1 by heat fusion or electrofusion, and this utility model does not limit this.

[0042] Furthermore, the pipe body 1 is provided with a chamfer at one end near the corresponding connection end. When the pipe body 1 and the connection end are heat-fused, the chamfer can be stacked and fused in a ring to compensate for the "missed weld or false weld" caused by the axial heat-fusion connection, thus forming a double fusion quality and strength guarantee.

[0043] In one embodiment, one of the connecting end and the pipe body 1 is provided with an internal thread and the other is provided with an external thread, and the connecting end and the pipe body 1 are threadedly connected.

[0044] The curved-elastic vector binary compensation structure of the pipeline system also includes a sealing element. In order to improve the sealing effect between the elastic connector and the pipe body 1, a sealing element is provided between the connector and the pipe body 1. The sealing element can be an elastic sealing ring.

[0045] The pipeline system's flexural vector binary compensation structure also includes an expansion and contraction compensation device. The expansion and contraction compensation device is connected to the main body 1 of the pipe fitting. The expansion and contraction compensation device can achieve axial expansion and contraction, which is compatible with the local compensation in this utility model, realizing full-length compensation from along the pipeline to the local area. This effectively resists various deformation pressures of the pipeline, such as axial, lateral and angular ones, and effectively resists high-intensity damage such as earthquakes and shock waves. It can provide reliable fluid transportation guarantee for various structures with high seismic resistance requirements, such as high-rise and super high-rise buildings, industrial plants, ships and production equipment.

[0046] In one embodiment, the expansion joint includes a metal bellows connected to the pipe body 1. Both ends of the metal bellows are fixed to the pipe body 1 by welding or threaded connections. The metal bellows is made of a metal material with excellent elasticity, possessing elastic deformation capability. Its corrugated shape allows for axial expansion and contraction deformation when the pipeline experiences thermal expansion or external forces. This expansion and contraction capability enables the metal bellows to effectively compensate for pipeline displacement caused by factors such as temperature changes, earthquakes, and wind pressure. The design of the metal bellows ensures that the pipeline maintains structural stability and prevents rupture or leakage when subjected to external deformation pressure.

[0047] The expansion joint includes not only a metal bellows but also supports, with supports on at least two sides of the elastic connector. The supports are divided into fixed supports (31) and sliding supports (32), which ensure the stability of the pipeline during use. It should be noted that the supporting and shearing forces of the supports should be greater than the thermal expansion forces caused by temperature changes in the pipeline.

[0048] like Figure 3As shown, the support is a fixed support 31, which is set on both sides of the elastic connector. The elastic vector unit formed by the elastic connector and the pipe body 1 absorbs and releases the thermal expansion force of the pipe between the fixed supports 31. The fixed supports 31 ensure that the pipe does not deform, thereby ensuring the stability of the pipe; it can also avoid damage caused by stress concentration and accumulation.

[0049] like Figure 4 and Figure 5 As shown, the sliding bracket 32 ​​can be installed at one end of the metal bellows, allowing the metal bellows to freely expand and contract when subjected to external forces. The function of the sliding bracket 32 ​​is to ensure that the metal bellows is unrestricted during expansion and contraction, and to allow it to move freely within the piping system.

[0050] This invention achieves pipeline compensation along its length by employing a metal bellows and / or support expansion joint, and local compensation through elastic connectors, thus realizing full-length compensation for the pipeline system and enhancing its resistance to various external pressures. Whether it's axial, lateral, or angular deformation caused by thermal expansion, or high-intensity damage such as earthquakes and shock waves, it effectively alleviates pressure, maintains pipeline stability and safety, and provides reliable fluid transport for structures with high seismic resistance requirements.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A two-dimensional compensation structure for the elastic vector of a pipeline system, characterized in that, include: Multiple pipe fittings; An elastic connector has at least two connecting ends, which are connected to the pipe body to connect each of the pipe bodies; The elastic modulus of the elastic connector is less than that of the main body of the pipe.

2. The bivariate vector compensation structure for the pipeline system according to claim 1, characterized in that, The elastic connector includes a thermoplastic part, which is disposed between the connecting end and the main body of the pipe.

3. The bivariate vector compensation structure for the pipeline system according to claim 2, characterized in that, The thermoplastic part is heat-fused to the corresponding connecting end and to the main body of the pipe fitting. And / or, the thermoplastic part is electrofused with the corresponding connecting end and with the pipe body.

4. The bivariate vector compensation structure for the pipeline system according to claim 1, characterized in that, The connecting end is threadedly connected to the main body of the pipe fitting.

5. The bivariate vector compensation structure for the pipeline system according to claim 1, characterized in that, It also includes a sealing element, which is disposed between the connecting end and the main body of the pipe fitting.

6. The bivariate vector compensation structure for the pipeline system according to claim 1, characterized in that, The elastic connectors include straight-through elastic connectors, tee elastic connectors, cross elastic connectors, elbow elastic connectors, and transition elastic connectors.

7. The bivariate vector compensation structure for a pipeline system according to any one of claims 1 to 6, characterized in that, It also includes an expansion joint, which is connected to the main body of the pipe fitting.

8. The bivariate vector compensation structure for the pipeline system according to claim 7, characterized in that, The expansion joint compensation device includes a metal corrugated pipe, which is connected to the main body of the pipe fitting.

9. The bivariate vector compensation structure for the pipeline system according to claim 7, characterized in that, The telescopic compensation device also includes a bracket, and the bracket is provided on at least two sides of the elastic connector.

10. The bivariate vector compensation structure for a pipeline system according to claim 9, characterized in that, The support includes a fixed support and a sliding support.

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