A large heating pipeline overhead permanent support system

Abstract

This invention discloses a large-scale overhead permanent support system for heating pipelines, relating to the technical field of overhead support systems for heating pipelines. The system includes a support mechanism and a roller mechanism. The base mechanism includes an insulated base with a covered bottom groove on its top. The top of the covered mechanism is arc-shaped, and a contact opening is provided at its top. The covered mechanism includes a first insulation pad and a second insulation pad, with covered top grooves on the bottom of each pad. The covered top groove and the covered bottom groove are opposite to each other and together form a covered cavity to accommodate the composite roller and connecting shaft. In this invention, by constructing a covered cavity around the roller mechanism, the rolling contact area and the non-contact insulation area are clearly spatially separated. The rolling support component only forms rolling contact with the heating pipeline in a localized load-bearing area; the remaining areas are enclosed by an insulation structure to form a relatively closed insulation space, structurally cutting off the direct convective heat exchange path with the external environment.

Description

Technical Field

[0001] This invention belongs to the field of overhead support technology for heating pipelines, specifically a large-scale permanent overhead support system for heating pipelines. Background Technology

[0002] In heating systems in northern regions, heating pipelines are typically used to transport high-temperature hot water or steam and other heat media. For large-diameter heating pipelines such as DN900, axial thermal expansion and contraction deformation occurs during operation. This axial displacement has a more significant impact on the support structure when the pipe diameter is large and the pipeline is long. To reduce the impact of factors such as foundation settlement, frozen soil, and freeze-thaw cycles on the pipeline's operational stability, overhead laying is usually adopted in engineering projects, with supports installed along the pipeline route.

[0003] In existing overhead heating pipeline projects, rolling supports are commonly used to accommodate axial displacement of the pipeline. These supports typically include a support frame and roller support assemblies mounted on the support frame. The roller support assemblies support the pipeline and release axial displacement through rolling, thereby reducing constraint stress and frictional wear between the pipeline and the support. When using a rolling support structure, the pipeline achieves load-bearing and displacement adaptation through contact with the roller support assemblies. This contact relationship is necessary for achieving the function of rolling support and is difficult to avoid.

[0004] However, since roller support assemblies and support frames are typically made of metal and are in direct contact with the external environment, heat in the pipeline can easily be transferred to the support frame through the roller support assemblies during operation, and further dissipated into the external environment, thus forming cold bridge heat transfer paths at the support locations. This is especially true for large-diameter heating pipelines, where the high operating temperature and large amount of heat generated lead to increased heat loss along the pipeline due to cold bridge heat transfer at the support locations, affecting the overall thermal performance of the heating system.

[0005] Therefore, in the rolling support structure of large-diameter overhead heating pipelines, how to reduce the cold bridge heat transfer effect between the roller support assembly and the support frame while ensuring the pipeline's load-bearing capacity and axial displacement adaptability, thereby reducing heat loss from the support parts, has become an urgent technical problem to be solved. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a permanent support system for large-scale overhead heating pipelines. This invention primarily addresses the problem that when large-diameter overhead heating pipelines are supported by rolling supports, the cold bridge heat transfer path formed by the metal contact between the rollers and the support structure is difficult to avoid, thus making it difficult to effectively reduce heat loss at the support location while ensuring the pipeline's load-bearing capacity and axial displacement adaptability.

[0007] The technical solution adopted by this invention to solve its technical problem is: A large-scale overhead permanent support system for heating pipelines includes a support mechanism and a roller mechanism. Several sets of roller mechanisms are equidistantly arranged along the length of the support mechanism. Each roller mechanism includes a composite roller, a connecting shaft, and a rotating plate. The two ends of the connecting shaft are fixedly connected to the composite roller and the rotating plate, respectively. The support mechanism includes an overhead support with a rotating groove inside. Each set of roller mechanisms is installed in a corresponding rotating groove via a rotating plate. The rotating grooves are spaced apart along the length of the overhead support. A fixing mechanism fixes a base mechanism onto the support mechanism. The base mechanism includes an insulated base with a bottom covering groove on its top. The top of the covering mechanism is arc-shaped, and a contact opening is provided at its top. The covering mechanism includes a first and a second insulation pad. Top covering grooves are provided at the bottom of the first and second insulation pads, respectively. The insulated base is located below the covering mechanism, and the bottom of the covering mechanism abuts against the top of the insulated base. The top covering groove and the bottom covering groove are opposite to each other and together form a covering cavity to accommodate the composite roller and the connecting shaft.

[0008] As a further aspect of the present invention: the composite roller has an inner cavity along the axis of the composite roller, and a core is provided in the inner cavity. The core has low thermal conductivity and is fixedly connected to the inner wall of the inner cavity.

[0009] As a further embodiment of the present invention: a limiting bracket is fixedly connected to the top wall of the overhead support, and a limiting pad is fixedly connected to the side wall of the limiting bracket. Two sets of limiting brackets are provided and are symmetrically arranged along the center of the overhead support. The side end of the limiting pad is arc-shaped and has heat insulation properties.

[0010] As a further embodiment of the present invention: the fixing mechanism includes a fixing frame and a fixing cylinder. The fixing frame is abutting and connected to the bottom wall of the heat insulation base. A plurality of positioning columns are fixedly connected to the bottom wall of the heat insulation base. A fixing column is fixedly connected to the bottom wall of the overhead support. The fixing frame has a plurality of positioning holes. The positioning columns and the fixing columns pass through the positioning holes. The positioning holes include a first positioning hole that cooperates with the positioning column and a second positioning hole that cooperates with the fixing column. The positioning column is inserted into the first positioning hole to form a lateral limit. The fixing column passes through the second positioning hole and presses and limits the fixing frame through the fixing cylinder. The fixing cylinder is sleeved on the outer surface of the fixing column. The top wall of the fixing cylinder is abutting and connected to the fixing frame.

[0011] As a further embodiment of the present invention: the inner cavity of the fixed cylinder is provided with a threaded rod, the bottom of the fixed column is provided with a threaded hole, the bottom end of the threaded rod is fixedly connected to the fixed cylinder, and the threaded rod is threadedly connected to the inner wall of the threaded hole.

[0012] As a further aspect of the present invention: storage grooves are respectively provided at the bottom of the first heat insulation pad and the second heat insulation pad, and expansion grooves are respectively provided at the top of the first heat insulation pad and the second heat insulation pad. The inner cavity of the storage groove is connected to the inner cavity of the expansion groove and the inner cavity of the covering top groove. An elastic element is provided in the storage groove. The bottom end of the elastic element is fixedly connected to the inner wall of the storage groove. A support frame is fixedly connected to the top wall of the elastic element. The support frame is slidably connected to the inner wall of the expansion groove. An elastic pad is fixedly connected to the top wall of the support frame. The elastic pad has heat insulation properties and is elastic.

[0013] As a further aspect of the present invention: a connecting groove is provided on the side end of the second heat insulation pad, and a connector is fixedly connected to the side end of the first heat insulation pad. The connector has a triangular cross-section and is abutted against the inner wall of the connecting groove.

[0014] As a further aspect of the present invention: the first heat insulation pad and the second heat insulation pad are respectively provided with locking components on their sides, and the locking components are respectively fixed to the overhead support by bolts, and the two sides of the heat insulation base are respectively attached to the overhead support.

[0015] As a further embodiment of the present invention: a guide rail is fixedly connected to the top wall of the heat insulation base. The guide rail is arc-shaped. Guide grooves are opened at the bottom of the first heat insulation pad and the second heat insulation pad. The guide rail is slidably connected to the inner wall of the guide groove.

[0016] As a further embodiment of the present invention: the locking assembly includes a locking plate and a locking pad, the side wall of the locking plate is fixedly connected to the locking pad, the locking pad has heat insulation properties, the locking pad has a locking groove, the side walls of the first heat insulation pad and the second heat insulation pad are respectively fixedly connected to locking members, the locking member is provided with a detector, the detector is fixedly set in the inner cavity of the locking member, the detection end of the detector is set towards the first heat insulation pad or the second heat insulation pad, the detector is connected to an external alarm terminal through a signal line or a wireless communication module, the locking member is embedded and connected to the inner wall of the locking groove, and the locking member is in the shape of a rectangular tube.

[0017] The beneficial effects of this invention are as follows: 1. In this invention, a covering cavity is constructed around the roller mechanism to clearly separate the rolling contact area from the non-contact insulation area in space. The rolling support component only makes rolling contact with the heating pipe in a localized load-bearing area, while the remaining area is enclosed by an insulation structure to form a relatively closed insulation space, structurally cutting off the direct convective heat transfer path with the external environment. Simultaneously, by integrating the support and force-transmitting components, the original continuous heat conduction chain from the pipe to the support is segmented and interrupted, thereby effectively reducing the cold bridge heat transfer effect while ensuring the rolling support function.

[0018] 2. This invention addresses the issue by constructing a multi-stage insulation system for the roller mechanism and large heating pipes: Firstly, by incorporating a low-thermal-conductivity core within the composite roller, its effective thermal conductivity cross-sectional area is reduced, weakening the axial heat conduction capacity at the source. Secondly, an external covering structure forms an insulating enclosure, and low-thermal-conductivity media and sealing structures are introduced in the connection area to partially isolate the supporting force transmission path, spatially dividing each heat conduction path and weakening it at key nodes. Through the synergistic effect of these structures, the problem of bypassing single-path insulation measures by bypass heat flow is avoided, reducing the multi-path coupled heat transfer effect overall, thereby improving the stability and reliability of the system's insulation performance.

[0019] 3. In this invention, an elastic element, an elastic pad, and a retaining frame with adaptive adjustment capabilities are installed inside the covering mechanism. When the temperature rises, the elastic element deforms under thermal action, driving the elastic pad and the retaining frame to move towards the pipe surface, thereby dynamically compensating for the gap and blocking the air convection path. When the temperature decreases or the load changes, the structure can recover or readjust to an adaptive state to maintain the gap within a reasonable range. Through this adaptive adjustment mechanism, dynamic sealing control of the non-contact thermal insulation area is achieved, ensuring that the thermal insulation performance and structural stability remain consistent under long-term operating conditions, thus avoiding the problem of thermal insulation performance degradation caused by gap changes. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the support mechanism, base mechanism, and covering mechanism of the present invention; Figure 3 This is a top view of the support mechanism structure of the present invention; Figure 4 For the present invention Figure 3 Structural sectional view of AA; Figure 5 For the present invention Figure 3 Structural sectional view of BB; Figure 6 For the present invention Figure 3 Structural sectional view of CC; Figure 7 For the present invention Figure 4 Enlarged schematic diagram of the structure at point D; Figure 8 For the present invention Figure 5 Enlarged schematic diagram of the structure at point E; Figure 9 This is a schematic diagram of the installation structure of the elastic element, the support frame, and the elastic pad of the present invention; Figure 10 This is a schematic diagram of the guide rail structure of the heat insulation base of the present invention; Figure 11 This is a top view of the heat-insulating base and composite roller structure of the present invention; Figure 12 This is a schematic diagram of the bottom structure of the covering mechanism of the present invention; Figure 13 This is a schematic diagram of the elastic element, the support frame, and the elastic pad structure of the present invention; Figure 14 This is a schematic diagram of the second heat insulation pad structure of the present invention; Figure 15 This is a schematic diagram of the first heat insulation pad structure of the present invention.

[0022] In the diagram: 1. Support mechanism; 101. Overhead support; 102. Limiting support; 103. Limiting pad; 104. Locking plate; 105. Locking pad; 106. Fixing column; 107. Locking groove; 108. Rotating groove; 2. Base mechanism; 201. Insulated base; 202. Positioning column; 203. Guide rail; 204. Covering bottom groove; 3. Covering mechanism; 301. First heat insulation pad; 302. Second heat insulation pad; 303. Locking element; 304. 305. Detector; 306. Contact port; 307. Guide groove; 308. Covering top groove; 309. Elastic element; 310. Elastic pad; 311. Support frame; 312. Telescopic groove; 313. Storage groove; 314. Connecting groove; 315. Connecting element; 4. Roller mechanism; 401. Composite roller; 402. Shaft core; 403. Connecting shaft; 404. Rotating plate; 5. Fixing mechanism; 501. Fixing frame; 502. Fixing cylinder; 503. Threaded rod. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 9As shown, a large-scale overhead permanent support system for heating pipelines includes a support mechanism 1, a base mechanism 2, a covering mechanism 3, a roller mechanism 4, and a fixing mechanism 5. The roller mechanism 4 has several sets of rollers evenly spaced along the length of the support mechanism 1. The roller mechanism 4 includes a composite roller 401, a connecting shaft 403, and a rotating plate 404. The two ends of the connecting shaft 403 are fixedly connected to the composite roller 401 and the rotating plate 404, respectively. The diameter of the connecting shaft 403 is smaller than the diameter of the composite roller 401. The support mechanism 1 includes an overhead support 101, with a rotating groove 108 inside. The rotating plate 404 is rotatably connected to the inner wall of the rotating groove 108. The base mechanism 2 and the covering mechanism 3 abut against each other. Next, the fixing mechanism 5 fixes the base mechanism 2 onto the support mechanism 1. The base mechanism 2 includes a heat-insulating base 201. The top of the heat-insulating base 201 is provided with a covering bottom groove 204. The top of the covering mechanism 3 is arc-shaped. The top of the covering mechanism 3 is provided with a contact port 305 for the top of the composite roller 401 to be exposed and to roll against the large heating pipe. The covering mechanism 3 includes a first heat-insulating pad 301 and a second heat-insulating pad 302. The bottom of the first heat-insulating pad 301 and the second heat-insulating pad 302 are respectively provided with covering top grooves 307. The tops of the composite roller 401 and the connecting shaft 403 are located in the covering top grooves 307, and the bottoms of the composite roller 401 and the connecting shaft 403 are located in the covering bottom grooves 204.

[0025] In this embodiment, during operation, the large heating pipeline undergoes significant axial thermal expansion and contraction deformation at the start of operation. To accommodate this displacement, a roller mechanism 4 is typically employed. However, the roller mechanism 4 relies on the contact between the large heating pipeline and the composite roller 401 to achieve load bearing and displacement release. This contact relationship inevitably creates a cold bridge heat transfer path between the large heating pipeline and the composite roller 401, resulting in heat loss along the composite roller 401. In this invention, the base mechanism 2 and the covering mechanism 3 are installed on the overhead support 101. The base mechanism 2 and the covering mechanism 3 cover the composite roller 401 and the connecting shaft 403. The large heating pipe is in contact with the composite roller 401. The covering bottom groove 204 opened on the top of the heat insulation base 201 and the covering top groove 307 opened on the bottom of the first heat insulation pad 301 and the second heat insulation pad 302 respectively form a sealed cavity. When the large heating pipe transfers heat to the composite roller 401, the heat at the composite roller 401 cannot directly contact the air because the heat insulation base 201, the first heat insulation pad 301 and the second heat insulation pad 302 have heat insulation properties, thereby avoiding the phenomenon of cold bridge formed by the composite roller 401.

[0026] It should be noted that under the high load of large-diameter heating pipes, the contact interface of the composite roller 401 needs to withstand continuous concentrated contact stress. If the covering mechanism 3 is directly set between the roller mechanism 4 and the large-diameter heating pipe, the insulation material is difficult to meet the requirements of load-bearing capacity and wear resistance. Therefore, the contact area is usually made of metal, which inevitably forms a high thermal conductivity path while satisfying the rolling function. At the same time, under the high load of the large-diameter heating pipe and the long-term rolling wear of the composite roller 401, non-metallic or low thermal conductivity materials are difficult to simultaneously meet the requirements of load-bearing strength, wear resistance, and dimensional stability. Therefore, the selection of the contact interface material is constrained in engineering to the range of high thermal conductivity materials. Therefore, the top of the covering mechanism 3 of the present invention is provided with a contact port 305. Since the top of the covering mechanism 3 is arc-shaped, the contact port 305 is used for the composite roller 401 and the large-diameter heating pipe to abut against each other. The contact port 305 is arc-shaped and its length is greater than the length of the composite roller 401 and the large-diameter heating pipe abutting against each other, so as to avoid the phenomenon of the large-diameter heating pipe and the covering mechanism 3 pressing against each other. The first heat insulation pad 301 and the second heat insulation pad 302 are attached to both sides of the large-diameter heating pipe to prevent air from forming a cold bridge between the large-diameter heating pipe and the covering mechanism 3 and the composite roller 401. At the same time, the first heat insulation pad 301 and the second heat insulation pad 302 form an arc-shaped guide transition surface to limit the two sides of the pipe and prevent the pipe vibration from pressing against the edge of the contact port 305.

[0027] When heat from the large-diameter heating pipe reaches the composite roller 401, the composite roller 401 transfers the heat to the connecting shaft 403, and the connecting shaft 403 transfers the heat to the rotating plate 404. Since the overhead support 101 is located outdoors and is in direct contact with the air, and because the overhead support 101, rotating plate 404, and connecting shaft 403 form a continuous structural system through multi-point rigid connections, heat can be transferred through multiple structural paths. Even if insulation measures are implemented in localized areas of the composite roller 401 and connecting shaft 403, the heat flow can still bypass the insulation area through the connecting shaft 403, rotating plate 404, and overhead support 101, thus forming a multi-path heat conduction network. However, these heat transfer paths are spatially coupled and difficult to isolate independently. Insulation measures for a single path often create bypass heat flow paths through the structural connections between the composite roller 401, connecting shaft 403, rotating plate 404, and overhead support 101, thereby weakening the overall insulation effect. Therefore, in this invention, the rotating groove 108 is filled with a low thermal conductivity lubricating medium. This medium forms a lubricating film during the rotation of the connecting shaft 403 and the rotating plate 404. The low thermal conductivity lubricating medium isolates the heat-conducting channel formed between the connecting shaft 403, the rotating plate 404, and the locking plate 104. Simultaneously, the locking plate 104 primarily provides support by abutting against the bottom of the rotating plate 404 and the connecting shaft 403 through the inner wall of the rotating groove 108. A heat insulation layer can be provided at the top of the inner wall of the rotating groove 108, and a sealing gasket is fixed to the inner wall of the rotating groove 108 to seal the gap between the rotating groove 108 and the connecting shaft 403, preventing the low thermal conductivity lubricating medium from flowing out. When the heat contained in the composite roller 401 cannot flow out, the heat from the large-diameter heating pipe will not continue to be transferred to the composite roller 401, thus avoiding the problem of heat loss from the large-diameter heating pipe.

[0028] Furthermore, the composite roller 401 has an inner cavity along its axial direction, and a core 402 is provided inside the inner cavity. The core 402 has low thermal conductivity and is fixedly connected to the inner wall of the inner cavity. When heat from the large-diameter heating pipe is transferred to the composite roller 401, the core 402 in the inner cavity of the composite roller 401 reduces the volume and effective area of ​​the composite roller 401 required for heat transfer, thus preventing the heat from being quickly conducted along the roller to the shaft end of the composite roller 401.

[0029] Furthermore, a limiting bracket 102 is fixedly connected to the top wall of the overhead support 101, and a limiting pad 103 is fixedly connected to the side wall of the limiting bracket 102. The limiting bracket 102 is provided in two sets and is symmetrically arranged along the center of the overhead support 101. The side end of the limiting pad 103 is arc-shaped and has heat insulation properties. The limiting pad 103 is attached to both sides of the large-diameter heating pipe. When the large-diameter heating pipe tends to shift laterally, the limiting support provided by the limiting bracket 102 is transmitted to both sides of the large-diameter heating pipe through the limiting pad 103, thus preventing the large-diameter heating pipe from shifting laterally. The limiting pad 103 has heat insulation properties, preventing the large-diameter heating pipe from directly contacting the limiting bracket 102 and forming a cold bridge. The shape of the limiting pad 103 provides longitudinal limiting for the large-diameter heating pipe. Since the load of the large-diameter heating pipe is mainly borne by the composite roller 401, and the wear of the limiting pad 103 on the large-diameter heating pipe during radial movement is negligible.

[0030] Furthermore, the fixing mechanism 5 includes a fixing frame 501 and a fixing cylinder 502. The fixing frame 501 is abutting and connected to the bottom wall of the heat insulation base 201. Several positioning posts 202 are fixedly connected to the bottom wall of the heat insulation base 201. A fixing post 106 is fixedly connected to the bottom wall of the overhead support 101. The fixing frame 501 has several positioning holes. The positioning posts 202 and the fixing posts 106 pass through the positioning holes respectively. The positioning holes include a first positioning hole that cooperates with the positioning post 202 and a second positioning hole that cooperates with the fixing post 106. The positioning post 202 is inserted into the first positioning hole to form a lateral limit. The fixing post 106 passes through the second positioning hole and presses and limits the fixing frame 501 through the fixing cylinder 502. The fixing cylinder 502 is sleeved on the outer surface of the fixing post 106. The top wall of the fixing cylinder 502 is abutting and connected to the fixing frame 501.

[0031] The fixed cylinder 502 is installed on the fixed column 106 to position and install the fixed frame 501. The fixed frame 501 is used to support the heat insulation base 201. The heat insulation base 201 is connected to the positioning column 202 and the positioning hole, so the heat insulation base 201 will not shift on the fixed frame 501. When the large-diameter heating pipeline vibrates during operation, the heat insulation base 201 will not shift.

[0032] Furthermore, the inner cavity of the fixing cylinder 502 is provided with a threaded rod 503, and the bottom of the fixing column 106 is provided with a threaded hole. The bottom end of the threaded rod 503 is fixedly connected to the fixing cylinder 502, and the threaded rod 503 is threadedly connected to the inner wall of the threaded hole. Since the fixing mechanism 5 is set in an outdoor environment, the fixing cylinder 502 is sleeved on the fixing column 106. Compared with the bolt connection of the prior art, the fixing cylinder 502 provides a sealed environment for the connection between the threaded rod 503 and the fixing column 106, preventing outdoor dust and rainwater from coming into contact with the threaded hole and the threaded rod 503 of the fixing column 106, thereby avoiding corrosion. When the heat insulation base 201 needs to be removed from the overhead support 101, the fixing frame 501 needs to be removed from the overhead support 101. If the fixing frame 501 is connected by bolts in the prior art, due to the lack of the sealing effect of the fixing cylinder 502, the bolt connection will corrode, which makes the removal of the heat insulation base 201 time-consuming and laborious.

[0033] In this embodiment, as Figure 9 , 10 As shown in Figures 12, 13, 14, and 15, the bottom of the first heat insulation pad 301 and the second heat insulation pad 302 are respectively provided with storage grooves 312, and the top of the first heat insulation pad 301 and the second heat insulation pad 302 are respectively provided with telescopic grooves 311. The inner cavity of the storage groove 312 is connected to the inner cavity of the telescopic groove 311 and the inner cavity of the covering top groove 307. An elastic element 308 is provided in the storage groove 312. The bottom end of the elastic element 308 is fixedly connected to the inner wall of the storage groove 312. A support frame 310 is fixedly connected to the top wall of the elastic element 308. The support frame 310 is slidably connected to the inner wall of the telescopic groove 311. An elastic pad 309 is fixedly connected to the top wall of the support frame 310. The elastic pad 309 has heat insulation properties and is elastic.

[0034] By arranging the covering mechanism 3 in the non-load-bearing area of ​​the composite roller 401 to separate the rolling path of the large-diameter heating pipe from the insulation path of the covering mechanism 3, a non-contact gap is formed between the covering mechanism 3 and the outer periphery of the composite roller 401. However, during the operation of the large-diameter heating pipe, due to the deformation of the composite roller 401 under load, manufacturing errors, and thermal expansion caused by temperature changes, a gap will be generated between the covering mechanism 3 and the large-diameter heating pipe, as the latter only has a close contact. This gap is in a dynamic state. When the gap increases, air convection within the gap is enhanced, and the large-diameter heating pipe transfers heat to the composite roller 401. The composite roller 401 then contacts the air in the gap through the contact port 305, thereby increasing the heat exchange in the non-contact area. When the gap decreases, the covering mechanism 3 may make local contact with the composite roller 401, leading to frictional wear or the formation of a new heat conduction path. Therefore, the size of the gap in the non-contact area cannot be too large or too small, thus creating a new constraint relationship between insulation performance and structural stability. Essentially, this problem manifests as the control of the gap state under a partitioned structure at the contact interface. Therefore, how to maintain the diameter gap within a reasonable range under different operating conditions has become an urgent technical problem to be solved.

[0035] When the covering mechanism 3 is installed at the bottom of the large-diameter heating pipe, the large-diameter heating pipe is in a non-operating state. A gap is reserved between the covering mechanism 3 and the large-diameter heating pipe to prevent the gap from decreasing when the large-diameter heating pipe stops operating. This would prevent the covering mechanism 3 from making local contact with the composite roller 401, resulting in friction and wear or the formation of a new heat conduction path.

[0036] The elastic pads 309 provided on the first heat insulation pad 301 and the second heat insulation pad 302 seal the gap between the covering mechanism 3 and the large-diameter heating pipe. The elastic pads 309 have heat insulation properties. When heat is conducted through the air in the gap, the elastic pads 309 block the heat conduction path, preventing the air in the gap and the gap outside the covering mechanism 3 from forming a heat conduction path. The elastic pads 309 provided on the first heat insulation pad 301 and the second heat insulation pad 302 can seal the gaps around the covering mechanism 3 and the large-diameter heating pipe. In the installed state, the elastic element 308 is in a pre-compressed or pre-bent state. The elastic element 308 can be "Z" shaped. Under the elastic action of the elastic element 308, the support frame 310 pushes the elastic pads 309 against the outer wall of the large-diameter heating pipe, so that the elastic pads 309 are in contact with or against the outer wall of the pipe.

[0037] When a large-diameter heating pipeline is in operation, the local gap between the covering mechanism 3 and the pipeline will dynamically change due to factors such as pipeline thermal expansion, roller deformation under load, vibration, and manufacturing errors. When the local gap increases, the elastic element 308 releases its pre-compression elastic force, pushing the support frame 310 upward along the expansion groove 311, allowing the elastic pad 309 to continue to adhere to the outer wall of the pipeline, thereby compensating for the increased gap and blocking the air convection path. When the local gap decreases, the elastic pad 309 and the support frame 310 can move downward, allowing the elastic element 308 to re-store energy and avoid rigid interference between the covering mechanism 3 and the pipeline. The function of the elastic element 308 does not rely on the macroscopic displacement caused by the thermal expansion of its material body, but rather on its elastic restoring force under pre-compression or pre-bending conditions, enabling the elastic pad 309 to dynamically compensate for the increase or decrease in the gap between the pipeline and the covering mechanism 3. Both the elastic pad 309 and the support frame 310 are arc-shaped, and the curvature matches the curvature of the outer wall of the large-diameter heating pipe. The support frame 310 slides in conjunction with the inner wall of the expansion groove 311 to prevent the support frame 310 from shifting or overturning during its up-and-down movement. The support frame 310 has low thermal conductivity.

[0038] It should be added that, Furthermore, a connecting groove 313 is provided on the side end of the second heat insulation pad 302, and a connector 314 is fixedly connected to the side end of the first heat insulation pad 301. The connector 314 has a triangular cross-section and is abutted against the inner wall of the connecting groove 313. The connector 314 seals the first heat insulation pad 301 and the second heat insulation pad 302 by abutting against the inner wall of the connecting groove 313. When the first heat insulation pad 301 and the second heat insulation pad 302 are connected due to their own workpiece errors, a gap is generated between the first heat insulation pad 301 and the second heat insulation pad 302. The shape of the connector 314 increases the path of the gap and is bent to prevent the gap between the first heat insulation pad 301 and the second heat insulation pad 302 from forming a new heat conduction path. The connector 314 is fixedly connected to a sealing gasket with low thermal conductivity at one end near the second heat insulation pad 302. The sealing gasket is plastic. When the connector 314 and the connecting groove 313 abut against each other, the sealing gasket is squeezed and deformed, further sealing the gap between the connecting groove 313 and the connector 314.

[0039] In this embodiment, as Figure 2 , 8 As shown in Figures 9, 10, 11 and 12, the first heat insulation pad 301 and the second heat insulation pad 302 are respectively provided with locking components on their sides. The locking components are respectively fixed to the overhead support 101 by bolts. The heat insulation base 201 is respectively attached to the overhead support 101 on both sides.

[0040] In this invention, the base mechanism 2 and the covering mechanism 3 provide thermal insulation for a single composite roller 401. Multiple composite rollers 401 are typically mounted on the overhead support 101. Therefore, multiple sets of base mechanisms 2 and covering mechanisms 3 are arranged relative to each other. As independent components, base mechanisms 2 and covering mechanisms 3 are subjected to a combined environment of temperature changes, vibration, and occasional contact over a long period. Furthermore, under these conditions, the material properties of base mechanisms 2 and covering mechanisms 3, as well as the interface state between them and the composite roller 401, will change, leading to a decrease in thermal resistance in non-contact areas or a change in the gap state (e.g., a gap between the thermally insulated base 201 and the overhead support 101). When the performance of local base mechanisms 2 and covering mechanisms 3 changes, a localized area of ​​weak thermal resistance will be formed at the corresponding support node (e.g., between the covering mechanism 3 and the connecting shaft 403), enhancing the cold bridge heat transfer effect. Since the thermal insulation interface state in existing structures is difficult to restore specifically, localized performance changes gradually accumulate and affect the overall thermal performance. Therefore, how to independently restore the interface state of a single base mechanism 2 and covering mechanism 3, and maintain the overall heat insulation performance without affecting the rolling support function, has become an urgent technical problem to be solved. When the base mechanism 2 and covering mechanism 3 have problems, the base mechanism 2 and covering mechanism 3 of the present invention can be replaced in a targeted manner. When the heat insulation base 201 has problems, the heat insulation base 201 can be replaced by disassembling and assembling the above-mentioned fixing mechanism 5.

[0041] Specifically, such as Figure 11 As shown, first remove the fixing bracket 501 from the bottom of the heat insulation base 201. Then move the heat insulation base 201 vertically downwards, ensuring that the bottom groove 204 of the heat insulation base 201 does not contact the roller mechanism 4. Then move the new heat insulation base 201 vertically upwards. When the heat insulation base 201 is in contact with the first heat insulation pad 301 and the second heat insulation pad 302, install the fixing mechanism 5 at the bottom of the heat insulation base 201.

[0042] When the first heat insulation pad 301 or the second heat insulation pad 302 malfunctions, the locking assembly can be removed to replace the first heat insulation pad 301 or the second heat insulation pad 302. Specifically, by removing the bolt connection between the locking assembly and the overhead support 101, the locking effect of the locking assembly on the first heat insulation pad 301 or the second heat insulation pad 302 is released. Then, the first heat insulation pad 301 or the second heat insulation pad 302 is slid along the surface of the large heating pipe. After the first heat insulation pad 301 or the second heat insulation pad 302 is detached from the bottom of the large heating pipe, the new first heat insulation pad 301 or the second heat insulation pad 302 can be installed. Thus, without affecting the support mechanism 1 and the roller mechanism 4 for the large heating pipe, the base mechanism 2 and the covering mechanism 3 can be replaced in a targeted manner.

[0043] Furthermore, a guide rail 203 is fixedly connected to the top wall of the heat insulation base 201. The guide rail 203 is arc-shaped, and guide grooves 306 are formed at the bottom of the first heat insulation pad 301 and the second heat insulation pad 302. The guide rail 203 is slidably connected to the inner wall of the guide groove 306. When the first heat insulation pad 301 or the second heat insulation pad 302 slides along the surface of the large heating pipe, the bottom of the first heat insulation pad 301 or the second heat insulation pad 302 slides along the guide rail 203. The curvature of the guide rail 203 is the same as that of the large heating pipe. The guide rail 203 slides relative to the inner wall of the guide groove 306. The guide rail 203 provides guidance for the movement of the first heat insulation pad 301 or the second heat insulation pad 302. At the same time, the guide rail 203 fits against the inner wall of the guide groove 306, providing a sealing effect for the gap between the base mechanism 2 and the covering mechanism 3.

[0044] Furthermore, the locking assembly includes a locking plate 104 and a locking pad 105. The sidewall of the locking plate 104 is fixedly connected to the locking pad 105. The locking pad 105 has heat insulation properties and a locking groove 107. The sidewalls of the first heat insulation pad 301 and the second heat insulation pad 302 are respectively fixedly connected to locking members 303. A detector 304 is provided inside the locking member 303. The detector 304 is fixedly installed in the inner cavity of the locking member 303. The detection end of the detector 304 faces the first heat insulation pad 301 or the second heat insulation pad 302. The detector 304 is connected to an external alarm terminal through a signal line or a wireless communication module. The locking member 303 is embedded and connected to the inner wall of the locking groove 107. The locking member 303 is rectangular.

[0045] When the locking assembly locks and fixes the first heat insulation pad 301 or the second heat insulation pad 302, the locking pad 105 abuts against the side wall of the first heat insulation pad 301 or the second heat insulation pad 302. The locking member 303 is inserted into the locking groove 107, and then the locking plate 104 is fixed to the overhead bracket 101 by bolts. The bolt connection of the locking plate 104 is existing technology, and the specific working principle will not be described in detail. The locking member 303 abuts against the inner wall of the locking groove 107, and transmits the limiting effect provided by the locking pad 105 to the first heat insulation pad 301 or the second heat insulation pad 302, so as to prevent the first heat insulation pad 301 or the second heat insulation pad 302 from lateral displacement on the heat insulation base 201.

[0046] The detector 304 inspects the covering mechanism 3. When a gap is detected in the covering mechanism 3, a signal is transmitted to the back end, reminding the staff to replace the covering mechanism 3 accordingly. The detector 304 can be an existing ultrasonic sensor. The detector 304 can be installed on the mounting bracket 501 to inspect the base mechanism 2. Since large heating pipelines are long and require many support mechanisms 1 and roller mechanisms 4, the detector 304 can be used to detect and replace the failed base mechanism 2 and covering mechanism 3, avoiding the inconvenience of checking each base mechanism 2 and covering mechanism 3 individually. Large heating pipelines typically operate continuously during winter, and if a single base mechanism 2 or covering mechanism 3 fails to provide insulation, the heat dissipation of the large heating pipeline will increase.

[0047] It should be further explained that the aforementioned issues are not isolated, but rather form a multivariable coupled relationship within the composite roller 401 support structure through contact patterns, structural connections, and environmental factors. Specifically, the rolling contact of the large heating pipe via the composite roller 401, while satisfying axial displacement release, determines the basic configuration of the heat conduction path. Furthermore, the structural connection between the large heating pipe and the support mechanism 1 and roller mechanism 4 creates an inseparable heat transfer network in space. Simultaneously, environmental factors further alter material properties and contact states, resulting in mutual constraints between the large heating pipe and the support mechanism 1 and roller mechanism 4 regarding thermal insulation performance, rolling performance, and structural reliability. In this coupled system, optimizing any single factor may compromise other performance objectives; therefore, overall performance improvement cannot be achieved through conventional single-point improvements. Moreover, within the limited spatial range of the large heating pipe and the support mechanism 1 and roller mechanism 4, the aforementioned multi-path heat transfer and multi-performance requirements must be realized within the structural unit formed by the same base mechanism 2 and covering mechanism 3.

[0048] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A large-scale overhead permanent support system for heating pipelines, comprising a support mechanism (1) and a roller mechanism (4), wherein the roller mechanism (4) is provided in several groups at equal intervals along the length direction of the support mechanism (1); characterized in that: The roller mechanism (4) includes a composite roller (401), a connecting shaft (403), and a rotating plate (404). The two ends of the connecting shaft (403) are fixedly connected to the composite roller (401) and the rotating plate (404) respectively. The support mechanism (1) includes an overhead support (101). The overhead support (101) has a rotating groove (108) inside. Each set of roller mechanisms (4) is installed in the corresponding rotating groove (108) through the rotating plate (404). The rotating grooves (108) are spaced apart along the length of the overhead support (101). The fixing mechanism (5) fixes the base mechanism (2) on the support mechanism (1). The base mechanism (2) includes a heat-insulating base (201). The top of the heat insulation base (201) is provided with a bottom groove (204), the top of the covering mechanism (3) is arc-shaped, and the top of the covering mechanism (3) is provided with a contact port (305). The covering mechanism (3) includes a first heat insulation pad (301) and a second heat insulation pad (302). The bottom of the first heat insulation pad (301) and the second heat insulation pad (302) are respectively provided with a top groove (307). The heat insulation base (201) is located below the covering mechanism (3). The bottom of the covering mechanism (3) abuts against the top of the heat insulation base (201). The top groove (307) and the bottom groove (204) are arranged opposite to each other and together form a covering cavity for accommodating the composite roller (401) and the connecting shaft (403). The first heat insulation pad (301) and the second heat insulation pad (302) are respectively provided with storage grooves (312) at the bottom and expansion grooves (311) at the top of the first heat insulation pad (301) and the second heat insulation pad (302). The inner cavity of the storage groove (312) is connected to the inner cavity of the expansion groove (311) and the inner cavity of the covering top groove (307). An elastic element (308) is provided in the storage groove (312). The bottom end of the elastic element (308) is fixedly connected to the inner wall of the storage groove (312). A support frame (310) is fixedly connected to the top wall of the elastic element (308). The support frame (310) is slidably connected to the inner wall of the expansion groove (311). An elastic pad (309) is fixedly connected to the top wall of the support frame (310). The elastic pad (309) has heat insulation properties and is elastic. The second heat insulation pad (302) has a connecting groove (313) on its side end, and the first heat insulation pad (301) has a connector (314) fixedly connected to its side end. The connector (314) has a triangular cross-section and is abutted against the inner wall of the connecting groove (313).

2. The large-scale overhead permanent support system for heating pipelines according to claim 1, characterized in that: The composite roller (401) has an inner cavity along the axis of the composite roller (401), and a core (402) is provided in the inner cavity. The core (402) has low thermal conductivity and is fixedly connected to the inner wall of the inner cavity.

3. A large-scale overhead permanent support system for heating pipelines according to claim 1, characterized in that: The top wall of the overhead support (101) is fixedly connected to a limiting support (102), and the side wall of the limiting support (102) is fixedly connected to a limiting pad (103). The limiting support (102) is provided in two sets and is symmetrically arranged along the center of the overhead support (101). The side end of the limiting pad (103) is arc-shaped and has heat insulation properties.

4. A large-scale overhead permanent support system for heating pipelines according to claim 1, characterized in that: The fixing mechanism (5) includes a fixing frame (501) and a fixing cylinder (502). The fixing frame (501) is abutted against the bottom wall of the heat insulation base (201). Several positioning columns (202) are fixedly connected to the bottom wall of the heat insulation base (201). A fixing column (106) is fixedly connected to the bottom wall of the overhead support (101). The fixing frame (501) has several positioning holes. The positioning columns (202) and the fixing columns (106) pass through the positioning holes respectively. The positioning holes include a first positioning hole that cooperates with the positioning column (202) and a second positioning hole that cooperates with the fixing column (106). The positioning column (202) is inserted into the first positioning hole to form a lateral limit. The fixing column (106) passes through the second positioning hole and presses and limits the fixing frame (501) through the fixing cylinder (502). The fixing cylinder (502) is sleeved on the outer surface of the fixing column (106). The top wall of the fixing cylinder (502) is abutted against the fixing frame (501).

5. A large-scale overhead permanent support system for heating pipelines according to claim 4, characterized in that: The inner cavity of the fixed cylinder (502) is provided with a threaded rod (503), and the bottom of the fixed column (106) is provided with a threaded hole. The bottom end of the threaded rod (503) is fixedly connected to the fixed cylinder (502), and the threaded rod (503) is threadedly connected to the inner wall of the threaded hole.

6. A large-scale overhead permanent support system for heating pipelines according to claim 1, characterized in that: The first heat insulation pad (301) and the second heat insulation pad (302) are respectively provided with locking components on their sides. The locking components are respectively fixed on the overhead support (101) by bolt connection. The heat insulation base (201) is attached to the overhead support (101) on both sides.

7. A large-scale overhead permanent support system for heating pipelines according to claim 6, characterized in that: The top wall of the heat insulation base (201) is fixedly connected to a guide rail (203), which is arc-shaped. The bottom of the first heat insulation pad (301) and the second heat insulation pad (302) are provided with guide grooves (306), and the guide rail (203) is slidably connected to the inner wall of the guide groove (306).

8. A large-scale overhead permanent support system for heating pipelines according to claim 6, characterized in that: The locking assembly includes a locking plate (104) and a locking pad (105). The side wall of the locking plate (104) is fixedly connected to the locking pad (105). The locking pad (105) has heat insulation properties and a locking groove (107) is provided in the locking pad (105). The side walls of the first heat insulation pad (301) and the second heat insulation pad (302) are respectively fixedly connected to locking members (303). The locking member (303) is provided with a detector (304). The detector (304) is fixedly installed in the inner cavity of the locking member (303). The detection end of the detector (304) is set towards the first heat insulation pad (301) or the second heat insulation pad (302). The detector (304) is connected to an external alarm terminal through a signal line or a wireless communication module. The locking member (303) is embedded and connected to the inner wall of the locking groove (107). The locking member (303) is rectangular tubular.

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