Support for underground pipe gallery

Abstract

The present application relates to a kind of underground pipe gallery support, it is related to the technical field of pipe gallery fixing support, including: fixed plate, for installation in pipe gallery;Supporting plate is fixedly connected with the fixed plate, the supporting plate is opened in sliding slot;Elastic ring is slidably arranged in the sliding slot, and the elastic ring can reciprocate along the extension direction of the sliding slot, and the fixed cavity for clamping the sidewall of pipe is formed between two elastic rings;Phase change material box is installed on the supporting plate, one side of the phase change material box is slidably connected with the elastic ring, phase change material is arranged in the phase change material box, and the phase change material absorbs the heat energy of the elastic ring or transfers heat energy to the elastic ring when phase change occurs.The technical scheme is used to reduce the deformation amount of pipe caused by temperature change and enhance the fixing effect of support on pipe.

Description

Technical Field

[0001] This invention relates to the technical field of fixed supports for utility tunnels, and in particular to a support for underground utility tunnels. Background Technology

[0002] A pipe gallery is essentially a corridor for pipelines. In chemical and related plants, many pipelines are concentrated together and laid out along the outside of the equipment or plant. They are usually suspended in the air, supported by brackets, forming a corridor-like structure. Pipe galleries used for municipal pipeline installations along roadsides or beneath them are located underground. When various pipelines are arranged inside a pipe gallery, for stability and safety, the brackets within the gallery transfer the pressure of the pipelines to the gallery, providing stable support for the pipelines. The brackets, along with fixing devices, secure the pipelines in their predetermined positions, thereby ensuring the safe operation of the pipelines.

[0003] Currently, the common method for fixing pipes in underground utility tunnels is to firmly lock the pipes to supports, ensuring a tight fit between the pipes and supports. While this method effectively secures the pipes and supports, the tight connection means that when the pipes expand due to heat, the pressure between the pipes and supports can cause excessive stress on both, potentially leading to damage. Furthermore, when the pipes cool and contract, gaps form between the pipes and supports, preventing the supports from providing adequate fixation and compromising the stability and safety of the pipeline. Summary of the Invention

[0004] The purpose of this application is to provide a support for underground pipe racks, which reduces pipe deformation caused by temperature changes and enhances the support's fixing effect on the pipes.

[0005] The technical solution for a support structure for an underground utility tunnel provided in this application includes:

[0006] Fixed plate, installed in the pipe rack;

[0007] A support plate is fixedly connected to the fixing plate, and a sliding groove is provided on the support plate;

[0008] An elastic ring is slidably inserted into the groove, and the elastic ring can reciprocate along the extension direction of the groove. A fixing cavity for clamping the side wall of the pipe is formed between the two elastic rings.

[0009] A phase change material box is installed on the support plate. One side of the phase change material box slides against the elastic ring. The phase change material box contains a phase change material. When the phase change material undergoes a phase change, it absorbs the heat energy of the elastic ring or transfers the heat energy to the elastic ring.

[0010] By adopting the above technical solution, when the pipeline undergoes thermal expansion and contraction, the elastic ring fixing the pipeline will move slightly in the direction away from or towards the pipeline, reducing the constraint and stress on the pipeline and helping to reduce stress concentration. In this way, while the elastic ring fixes the pipeline, there is no excessive interaction force between the pipeline and the elastic ring, which helps to reduce excessive compression of the pipeline and extend its service life. When the pipeline temperature is higher than the elastic ring, the pipeline will transfer some heat to the elastic ring, and the elastic ring will transfer some heat to the phase change material box. When the temperature reaches a certain value, the phase change material absorbs heat and undergoes a phase change, changing from a solid to a liquid state. The heat from the pipeline can be transferred through the elastic ring to the phase change material box and the phase change material, achieving the purpose of cooling the pipeline. After the pipeline is cooled, the thermal expansion of the pipeline decreases, thereby reducing the amount of pipeline deformation. When the pipeline temperature is low, the phase change material changes from a liquid to a solid state and continues to release heat. The heat is transferred through the elastic ring to the pipeline, causing the pipeline to heat up, thereby reducing the degree of pipeline contraction and achieving the same effect of reducing pipeline deformation. Therefore, by combining the elastic ring with the phase change material box, the degree of thermal expansion and contraction deformation of the pipeline can be effectively reduced, ultimately enhancing the pipeline's fixation effect.

[0011] Optional, also includes:

[0012] Heat-conducting pipes are used to be installed in pipe racks, with one end penetrating the pipe rack and contacting groundwater.

[0013] A thermoplastic wire is installed on the phase change material box. When the energy storage of the phase change material box reaches a threshold, the thermoplastic wire can change shape and come into contact with the heat pipe.

[0014] By adopting the above technical solution, when the pipeline temperature continues to rise and the heat absorption of the phase change material cannot meet the cooling requirements of the pipeline, the temperature of the phase change material box continues to rise. Heat is transferred to the heat-deformed wire. When the temperature of the heat-deformed wire reaches a certain value, it contacts the heat-conducting pipe. The heat from the pipeline can then be transferred to the groundwater through the elastic ring, phase change material box, heat-deformed wire, and heat-conducting pipe, thereby improving the cooling capacity of the pipeline. This ensures that even if the pipeline temperature is too high, it can still be cooled effectively, reducing the degree of thermal expansion and contraction. When the pipeline temperature returns to below a certain value, the heat-deformed wire 5 detaches from the heat-conducting pipe, eliminating the need for further cooling and minimizing the risk of overcooling. Therefore, the above solution effectively reduces the thermal expansion and contraction of the pipeline, reduces pipeline deformation, and extends the pipeline's service life.

[0015] Optionally, it also includes an elastic connector, wherein the elastic ring includes an abutment portion and a telescopic portion, the telescopic portion is used to clamp the pipe, one end of the telescopic portion is fixed to the abutment portion, the end of the telescopic portion away from the abutment portion is detachably connected to one end of the connector, and the abutment portion slides through the groove and slides against the phase change material box.

[0016] By adopting the above technical solution, when the pipe temperature rises, the thermal conductivity of the elastic rings may differ, with one elastic ring potentially having a higher thermal conductivity, allowing it to transfer heat more quickly to the phase change material box, thus causing uneven temperatures on the pipe sidewalls. However, by installing an elastic connector between the two elastic rings, heat can also be transferred through the connector. When there is a temperature difference between the two elastic rings, the elastic connector acts as a bridge, balancing the temperatures between them. The elastic connector optimizes the heat transfer path, reducing the temperature difference between the two elastic rings, thereby making the temperature on the pipe sidewalls more uniform. This helps reduce temperature concentration and hot spots, decreasing the probability of localized pipe deformation. Furthermore, the elastic connector also provides some restraint to the expansion joints, resulting in a tighter contact between the expansion joints and the pipe, increasing the contact area between the pipe and the elastic rings, and improving the heat exchange efficiency between them.

[0017] Optionally, the size of the abutment portion increases along the direction closer to the phase change material box, and the size of the abutment portion is adapted to the size of the groove.

[0018] By adopting the above technical solution, when the pipe temperature is high, the heat of the pipe will be transferred from the expansion joint to the contact joint, and then from the contact joint into the phase change material box. The increased contact area between the contact joint and the phase change material box allows the heat from the contact joint to be transferred to the phase change material box more quickly and evenly, which not only avoids the formation of hot spots on the phase change material box, but also increases the heat exchange efficiency between the contact joint and the phase change material box.

[0019] Optionally, it also includes an insulation pad disposed on the side of the elastic ring and the elastic connector away from the pipe.

[0020] By employing the above technical solution, heat is transferred between the pipe, elastic ring, elastic connector, and phase change material box. During this heat transfer process, some heat is rapidly dissipated. However, the installation of an insulation pad reduces unnecessary heat loss, significantly slows the rate of heat loss, and extends the heat exchange time. This allows the pipe to maintain a suitable temperature for an extended period, preventing large temperature differences between the pipe and its sidewalls during heat flow, reducing the pipe's thermal expansion and contraction deformation, and thus minimizing the risk of pipe rupture. Furthermore, the insulation pad reduces friction between the elastic ring and the sidewall of the groove, reducing wear on the elastic ring and extending its service life.

[0021] Optionally, the elastic ring includes a heat-conducting layer and a fixing layer, the heat-conducting layer and the fixing layer are fixedly connected, and the heat-conducting layer is fitted to the pipe.

[0022] By employing the above technical solutions, it is difficult to achieve both good thermal conductivity and effective pipe fixation using a single material for the elastic ring. However, by using different materials for the thermally conductive layer and the fixing layer of the elastic ring—the thermally conductive layer primarily facilitates rapid heat exchange, while the fixing layer is mainly used for pipe fixation—their functions are different, and the different materials used easily achieve their respective purposes. Combining these functions allows the elastic ring to easily achieve both good thermal conductivity and effective pipe fixation.

[0023] Optionally, the end face of the heat-conducting layer near the pipe has a concave-convex surface.

[0024] By adopting the above technical solution, the presence of uneven surfaces increases the contact area between the pipe and the heat-conducting layer, while also disturbing the flow of heat in the boundary layer, thus improving the heat transfer coefficient. When the pipe temperature rises, this allows for more rapid heat exchange between the pipe and the elastic ring.

[0025] Optionally, a vacuum layer is provided between the thermally conductive layer and the fixing layer, and the vacuum layer is disposed close to the fixing layer.

[0026] By adopting the above technical solution, vacuum is an excellent heat insulation medium that can effectively insulate and keep the heat in a more concentrated and directional manner between the pipe, the heat-conducting layer and the phase change material box, thereby keeping the pipe at a suitable temperature and effectively reducing the degree of thermal expansion and contraction deformation of the pipe.

[0027] Optionally, the phase change material is paraffin, inorganic salt, or fatty acid.

[0028] By adopting the above technical solution, paraffin wax has a high energy storage density, which means that under the same volume and weight, paraffin wax can store more energy. Paraffin wax releases heat when it changes from liquid to solid, and exchanges heat with the pipe through the elastic element, so that the pipe can be kept at a suitable temperature for a long time.

[0029] Optionally, the thermally conductive layer is made of copper, and the fixing layer is made of an elastic pad.

[0030] By adopting the above technical solutions, different materials can be used to achieve both good thermal conductivity and good pipe fixing effect in the elastic ring.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The elastic ring contacts the pipe and the phase change material box, allowing heat to be transferred among the three. When the pipe gets too hot, the heat is stored in the phase change material box; when the pipe temperature drops, the phase change material box returns the heat to the pipe. Therefore, the combined use of the elastic ring and the phase change material box effectively reduces the degree of thermal expansion and contraction deformation of the pipe, ultimately enhancing the pipe's stability.

[0033] 2. The heat-conducting pipe is installed in the pipe gallery and runs through the pipe gallery to contact the groundwater. The heat-deformation wire is installed on the phase change material box. When the energy storage of the phase change material box reaches the threshold, the heat-deformation wire can change its shape to contact the heat-conducting pipe, which can effectively reduce the thermal expansion and contraction of the pipeline, reduce the deformation of the pipeline, and extend the service life of the pipeline.

[0034] 3. The elastic connector is detachably connected to the telescopic part of the two elastic rings, so that heat can also be transferred through the elastic connector. When there is a temperature difference between the two elastic rings, the elastic connector will act as a bridge to balance the temperature between the two elastic rings. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a support for an underground utility tunnel according to this application;

[0036] Figure 2 This is a partial sectional view of a support for an underground utility tunnel according to this application.

[0037] In the figure, 1 is the fixing plate; 2 is the support plate; 21 is the sliding groove; 3 is the elastic ring; 31 is the abutment part; 32 is the telescopic part; 33 is the heat-conducting layer; 34 is the fixing layer; 35 is the vacuum layer; 4 is the phase change material box; 5 is the heat-deformation wire; and 6 is the elastic connector. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2This application will be described in further detail below.

[0039] Please see Figure 1 and Figure 2 As shown, a support structure for an underground utility tunnel includes: a fixing plate 1, a support plate 2, an elastic ring 3, a phase change material box 4, a heat-conducting pipe (not shown in the figure), a heat-deformation wire 5, an elastic connector 6, and an insulation pad (not shown in the figure). Wherein:

[0040] The fixing plate 1 is used for installation in the pipe gallery. The support plate 2 can be fixedly connected to the fixing plate 1 by welding, threaded connection, snap-fit, etc. If it is desired to adjust the spacing between different support plates 2 appropriately to increase space utilization, the connection method between the support plate 2 and the fixing plate 1 is preferably threaded connection.

[0041] The elastic ring 3 includes an abutment portion 31 and a telescopic portion 32. The telescopic portion 32 is used to clamp the pipe, and one end of the telescopic portion 32 is fixed to the abutment portion 31.

[0042] The elastic connector 6, to ensure heat transfer and ductility, can be made of copper sheet. The end of the telescopic part 32 away from the abutment part 31 is detachably connected to one end of the elastic connector 6. This detachable connection can be achieved through threaded connection or snap-fit ​​connection. In this embodiment, a snap-fit ​​connection is used for simplification. A limiting groove is provided at the end of the elastic connector 6 near the telescopic part 32, and a limiting protrusion adapted to the limiting groove is provided at the end of the telescopic part 32 away from the abutment part 31. When the pipe temperature rises, the thermal conductivity of the elastic rings 3 may vary. If one elastic ring 3 has a higher thermal conductivity, it can transfer heat more quickly, resulting in a lower temperature on the pipe sidewall near the elastic ring 3 with higher thermal conductivity. This may lead to uneven stress on the pipe, causing stress concentration. By providing the elastic connector 6 between the two elastic rings 3, the elastic connector 6 adapts to pipe changes while also allowing heat to be transferred. When a temperature difference exists between the two elastic rings 3, the elastic connector 6 acts as a bridge to balance the temperature between them. The elastic connector 6 optimizes the heat transfer path, reducing the temperature difference between the two elastic rings 3, thus making the temperature between the pipe sidewalls more uniform. This helps reduce temperature concentration and hot spots, and decreases the probability of localized pipe deformation. Furthermore, the elastic connector 6 also provides some restraint to the expansion joint 32, applying a certain tension to it, resulting in a tighter contact between the expansion joint 32 and the pipe. This increases the contact area between the pipe and the elastic rings 3, improving the heat exchange efficiency between them.

[0043] A groove 21 is provided on the support plate 2. The abutment portion 31 of the elastic ring 3 slides through the groove 21, and the abutment portion 31 can reciprocate along the extension direction of the groove 21. A fixing cavity for clamping the side wall of the pipe is formed between the telescopic portions 32 of the two elastic rings 3. To achieve this function, an elastic element such as a spring or rubber can be added between the abutment portion 31 and the side wall of the groove 21 away from the pipe. In this embodiment, the spring is described as unfolded. One end of the spring is fixedly connected to the abutment portion 31, and the other end of the spring is fixedly connected to the side of the groove 21 away from the pipe. When the pipe is just heated and expands, the spring has just deformed, and the elastic force exerted by the spring on the elastic ring 3 is small. The elastic ring 3 can slide more easily in the groove 21, reducing the constraint and stress on the pipe and helping to reduce stress concentration in the pipe. When the pipeline wants to expand further or undergo large-scale sliding due to external environmental influences, the elastic force of the elastic ring 3 increases in the direction away from the pipeline, making it difficult for the pipeline to slide extensively. This keeps the pipeline relatively fixed within a suitable range. Thus, there is no excessive interaction force between the pipeline and the elastic ring 3, allowing the pipeline to receive adequate support even under light loads. This helps reduce the compression of the pipeline by the elastic element, thereby extending the pipeline's service life.

[0044] A phase change material box 4 is mounted on the support plate 2. The box contains a phase change material, which absorbs or transfers heat energy from the elastic ring 3 during a phase change. In this embodiment, paraffin wax is selected as the phase change material. Paraffin wax does not lose energy due to natural decay and can store energy for a long time. Furthermore, paraffin wax has a high energy density, meaning it can store more energy for the same volume and weight. When the pipe temperature rises, the paraffin wax changes from a solid to a liquid state to absorb heat. When the pipe temperature drops to a certain value, the paraffin wax changes from a liquid to a solid state to release heat. Heat exchange occurs between the paraffin wax and the pipe through the elastic element, maintaining the pipe at a suitable temperature for a long time, preventing it from becoming too cold or too hot. In other embodiments, inorganic salts, fatty acids, or other phase change materials can be selected as appropriate. Porous phase change materials can also be selected to accelerate heat absorption. When the temperature of the heat transported in the pipe is higher than the pipe temperature, the pipe temperature rises, causing thermal expansion. The elastic ring 3, which fixes the pipe, moves away from the pipe, while the pipe transfers heat to the elastic ring 3. The abutment portion 31 of the elastic ring 3 slides against one side of the phase change material box 4. The elastic ring 3 transfers heat to the phase change material box 4 through the abutment portion 31. The paraffin in the phase change material box 4 undergoes a phase change, transforming from a solid to a liquid state to store heat. Therefore, the heat of the pipeline can be transferred to the phase change material box 4 and the paraffin through the elastic ring 3, preventing the pipeline temperature from becoming too high, reducing the amount of thermal deformation of the pipeline, and lowering the risk of pipeline rupture caused by excessive thermal expansion. When the pipeline temperature drops to a certain value, the paraffin undergoes a phase change, transforming from a liquid to a solid state and releasing heat. This heat is transferred to the pipeline through the elastic ring 3, preventing the pipeline from becoming too cold and reducing the temperature difference between the heat transported in the pipeline and the pipeline temperature, thus also reducing the amount of pipeline deformation. Therefore, the combined use of the elastic ring 3, the elastic connector 6, and the phase change material box 4 can effectively reduce the degree of thermal expansion and contraction deformation of the pipeline, reduce the movement distance of the elastic ring 3, allow the elastic ring 3 to better fix the pipeline, and reduce the risk of pipeline rupture caused by repeated thermal expansion and contraction deformation, thus extending the service life of the pipeline.

[0045] Heat-conducting pipes are used to install in pipe racks, with one end penetrating the rack and contacting groundwater.

[0046] A thermoforming wire 5 is installed on the phase change material box 4. In this embodiment, the thermoforming wire 5 is made of a deformation memory alloy. Initially, the thermoforming wire 5 is coiled, spiral, or in other shapes. As the pipeline continuously delivers heat, the elastic ring 3 also continuously delivers heat to the phase change material box 4. The phase change material box 4 continuously absorbs heat, causing the paraffin wax within it to undergo a phase change and store energy. When the paraffin wax in the phase change material box 4 completely transforms into a liquid state, the heat storage capacity of the phase change material box 4 reaches its limit, and the phase change material box 4 can no longer absorb heat, thus failing to continue cooling the pipeline. If the pipeline is not cooled, continued thermal expansion will cause excessive stress, potentially leading to pipeline rupture. The heat-deformed wire 5 is installed on the phase change material box 4. When the heat storage of the phase change material box 4 reaches the threshold, the heat-deformed wire 5 changes shape and comes into contact with the heat-conducting pipe. The heat of the pipe can then be transferred to the groundwater through the elastic ring 3, the phase change material box 4, the heat-deformed wire 5, and the heat-conducting pipe, improving the cooling capacity of the pipe and preventing excessive thermal expansion. No matter how much heat the pipe continuously outputs, the above-mentioned device can effectively cool the pipe, ensuring that the pipe temperature does not become too high. When the pipe no longer supplies heat to the phase change material box 4, there is no need to cool the pipe. The heat-deformed wire 5 separates from the heat-conducting pipe, preventing heat from being further transferred away. The paraffin in the phase change material box 4 changes from liquid to solid, and the heat is returned to the pipe through the elastic ring 3, reducing the degree of pipe contraction and preventing the pipe from becoming too cold.

[0047] In other embodiments, the size of the abutment portion 31 increases along the direction approaching the phase change material box 4, and the size of the abutment portion 31 is adapted to the size of the slide groove 21. When the pipe, the elastic element, and the phase change material box 4 exchange heat, the increased contact area between the abutment portion 31 of the elastic element and the phase change material box 4 allows the abutment portion 31 to exchange heat with the phase change material box 4 more quickly and evenly, avoiding the occurrence of hot spots on the phase change material box 4 and increasing the heat exchange efficiency between the abutment portion 31 and the phase change material box 4. Furthermore, as the size of the abutment portion 31 gradually increases, the abutment portion 31 of the elastic ring 3 can slide more stably through the slide groove 21, and the abutment portion 31 will not easily detach from the phase change material box 4, thus ensuring that the abutment portion 31 always slides against one side of the phase change material box 4, guaranteeing the heat exchange efficiency between the abutment portion 31 and the phase change material box 4.

[0048] An insulation pad is installed on the side of the elastic ring 3 and the elastic connector 6 away from the pipe. During the heat transfer process between the pipe, elastic ring 3, elastic connector 6, and phase change material box 4, without an insulation pad, some heat would be rapidly lost. However, with the insulation pad, unnecessary heat loss is reduced, and the time for the phase change material box 4 to replenish heat to the pipe is significantly increased. This allows the pipe to maintain a suitable temperature for a longer period, reducing the temperature difference between the pipe and its sidewall during heat flow, thereby reducing the deformation due to thermal expansion and contraction and lowering the risk of pipe rupture. Furthermore, the insulation pad reduces friction between the elastic ring 3 and the sidewall of the groove 21, reducing wear on the elastic ring 3 and extending its service life.

[0049] In other embodiments, both the abutment portion 31 and the telescopic portion 32 of the elastic ring 3 include a heat-conducting layer 33 and a fixing layer 34, which are fixedly connected. The heat-conducting layer 33 is fitted to the pipe and is made of copper, while the fixing layer 34 is made of an elastic pad. Using a single material for the elastic ring 3 makes it difficult to achieve both good heat conduction and good pipe fixation. However, by using different materials for the heat-conducting layer 33 and the fixing layer 34 of the elastic ring 3, the heat-conducting layer 33 is mainly used for rapid heat exchange, while the fixing layer 34 is mainly used for fixing the pipe. The functions of the two are different, and the materials used are different, which can easily achieve their respective functions, allowing the elastic ring 3 to achieve both good heat conduction and good pipe fixation. A vacuum layer 35 is provided between the heat-conducting layer 33 and the fixed layer 34. Vacuum is an excellent heat insulation medium. Heat cannot be conducted or convection can not occur in a vacuum. The vacuum layer 35 between the heat-conducting layer 33 and the fixed layer 34 can effectively prevent heat from flowing from the heat-conducting layer 33 into the fixed layer 34, reduce unnecessary heat loss, and make the heat flow more concentratedly and rapidly between the pipe, the heat-conducting layer 33 and the phase change material box 4. This ensures that the pipe is always at a suitable temperature and can effectively reduce the degree of thermal expansion and contraction deformation of the pipe.

[0050] The heat-conducting layer 33 has an uneven surface on the end face near the pipe. This uneven surface increases the contact area between the pipe and the heat-conducting layer 33, and also disturbs the flow of heat in the boundary layer, thus improving the heat transfer coefficient. When the pipe temperature rises, this allows heat to be exchanged more quickly between the pipe and the elastic ring 3. Furthermore, the larger contact area increases the friction between the pipe and the elastic ring 3, enabling the elastic ring 3 to provide better fixation for the pipe and preventing relative sliding between them, thereby enhancing the fixing effect of the elastic ring 3 on the pipe.

[0051] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A support structure for underground utility tunnels, characterized in that, include: Fixing plate (1), used for installation in the pipe gallery; A support plate (2) is fixedly connected to the fixing plate (1), and a sliding groove (21) is provided on the support plate (2). The elastic ring (3) is slidably inserted in the groove (21), and the elastic ring (3) can reciprocate along the extension direction of the groove (21). A fixing cavity for clamping the side wall of the pipe is formed between the two elastic rings (3). A phase change material box (4) is installed on the support plate (2). One side of the phase change material box (4) slides against the elastic ring (3). The phase change material box (4) contains a phase change material. When the phase change material undergoes a phase change, it absorbs the heat energy of the elastic ring (3) or transfers the heat energy to the elastic ring (3). It also includes an elastic connector (6), the elastic ring (3) includes an abutment part (31) and a telescopic part (32), the telescopic part (32) is used to clamp the pipe, one end of the telescopic part (32) is fixed to the abutment part (31), the end of the telescopic part (32) away from the abutment part (31) is detachably connected to one end of the elastic connector (6), the abutment part (31) slides through the groove (21) and slides against the phase change material box (4); It also includes a heat insulation pad, which is disposed on the side of the elastic ring (3) and the elastic connector (6) away from the pipe; The elastic ring (3) includes a heat-conducting layer (33) and a fixing layer (34). The heat-conducting layer (33) is fixedly connected to the fixing layer (34), and the heat-conducting layer (33) is fitted to the pipe. A vacuum layer (35) is provided between the heat-conducting layer (33) and the fixing layer (34), and the vacuum layer (35) is disposed close to the fixing layer (34).

2. The support for an underground utility tunnel according to claim 1, characterized in that: Also includes: Heat-conducting pipes are used to be installed in pipe racks, with one end penetrating the pipe rack and contacting groundwater. The thermal deformation wire (5) is installed on the phase change material box (4). When the energy storage of the phase change material box (4) reaches the threshold, the thermal deformation wire (5) can change its shape and contact the heat pipe.

3. The support for an underground utility tunnel according to claim 2, characterized in that: The size of the abutment (31) increases along the direction close to the phase change material box (4), and the size of the abutment (31) is adapted to the size of the groove (21).

4. The support for an underground utility tunnel according to claim 1, characterized in that: The heat-conducting layer (33) has a concave-convex surface on the side end face near the pipe.

5. A support for an underground utility tunnel according to claim 1, characterized in that: The thermally conductive layer (33) is made of copper, and the fixing layer (34) is made of an elastic pad.

6. A support for underground utility tunnels according to claim 1, characterized in that: The phase change material is paraffin, inorganic salt, or fatty acid.

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