A direct-buried heat supply pipeline heat preservation device

Abstract

The utility model discloses a direct -buried heat supply pipeline heat preservation device, include: prefabricated heat supply subassembly and prefabricated encapsulation heat preservation subassembly, prefabricated encapsulation heat preservation subassembly installs between two groups prefabricated heat supply subassembly, prefabricated heat supply subassembly includes heat supply pipeline, flange, polyethylene outer tube and polyurethane foam heat preservation material, prefabricated encapsulation heat preservation subassembly is by encapsulation heat preservation shell, polyurethane heat preservation layer and filling heat preservation board constitute, all components of the utility model are standardization spare, only need simple assembly, buckling and fastening on the spot, has greatly shortened construction cycle, has reduced the dependence to worker's skill, through the design of outer tube slot, flange slot and filling heat preservation board, makes the pipeline original heat preservation layer and the junction new heat preservation layer smooth transition, seamless link, effectively prevents cold bridge phenomenon, improves heat preservation effect.

Description

Technical Field

[0001] This utility model relates to the technical field of heating pipelines, and in particular to a heat preservation device for directly buried heating pipelines. Background Technology

[0002] Direct-buried insulated pipes are widely used in urban centralized heating projects due to their advantages such as convenient construction, good insulation effect, and long service life. These pipes are usually prefabricated in a factory, consisting of an inner steel pipe, a middle polyurethane foam insulation layer, and an outer polyethylene protective shell.

[0003] However, during on-site construction, multiple sections of directly buried insulated pipes need to be connected via flanges. For flange connections, on-site foaming or manual wrapping of insulation material is commonly used. Both methods are susceptible to the influence of on-site environment and human factors, resulting in low construction efficiency, significant fluctuations in construction quality, and insufficient reliability of insulation sealing, while also placing considerable pressure and cost on subsequent maintenance. Therefore, a direct-buried heating pipeline insulation device is needed to solve this problem. Utility Model Content

[0004] To address the problems mentioned in the background section, this utility model provides a direct-buried heating pipeline insulation device.

[0005] The technical solution of this utility model to achieve the above objectives is a direct-buried heating pipeline insulation device, comprising: a prefabricated heating component and a prefabricated encapsulated insulation component, wherein the prefabricated encapsulated insulation component is installed between two sets of prefabricated heating components;

[0006] The prefabricated heating assembly includes a heating pipe, flanges, a polyethylene outer pipe, and polyurethane foam insulation material. The flanges are welded to both ends of the heating pipe, and the polyethylene outer pipe is fitted onto the outside of the heating pipe. The two ends of the polyethylene outer pipe are spaced a certain distance from the flanges. The polyurethane foam insulation material is filled between the polyethylene outer pipe and the heating pipe. The flanges between the two sets of the prefabricated heating assemblies are fastened with bolts and nuts, and the flange sealing surface is fitted with a sealing gasket.

[0007] The prefabricated encapsulated insulation component consists of an encapsulated insulation shell, a polyurethane insulation layer, and a filling insulation board.

[0008] The encapsulated heat insulation shell is composed of two semi-circular encapsulated shells spliced ​​together and fitted onto the polyethylene outer tubes of the two sets of prefabricated heating components. The outer end of the semi-circular encapsulated shell is encapsulated with end plates, and the encapsulated end plates of the two semi-circular encapsulated shells are fastened and fixed by bolts and nuts.

[0009] The polyurethane insulation layer is prefabricated in a semi-circular encapsulation shell. After solidification, it is provided with outer tube slots at both ends and a flange groove at the center. The flange groove is connected to the two outer tube slots through a heating pipe groove. The diameter of the outer tube slot matches the outer diameter of the polyethylene outer tube, and the diameter of the flange groove matches the outer diameter of the flange.

[0010] The insulation board consists of two semi-circular ring plates. The inner diameter of the ring plates matches the outer diameter of the heating pipe, and the outer diameter of the ring plates matches the outer diameter of the flange. After the two semi-circular ring plates are spliced ​​together, one side of the ring plates is flat and contacts the side surface of the flange groove. The shape of the other side of the ring plates matches the shape of the flange tenon. A hexagonal groove is provided on this surface. The size of the hexagonal groove corresponds to the size of the bolts and nuts installed on the flange.

[0011] Furthermore, after the prefabricated encapsulated insulation component is installed, the polyethylene outer tube is inserted into the circular groove formed by two outer tube slots, and the polyethylene outer tube and polyurethane foam insulation material are in contact with the inner end face of the outer tube slot.

[0012] Furthermore, the insulation board is installed on the heating pipe and is attached to the tenon of the flange, forming a cylinder with the insulation board and the flange.

[0013] Furthermore, after the prefabricated encapsulated insulation component is installed, the filling insulation board and the flange form a cylinder which is inserted into the circular groove formed by the two flange grooves and contacts the inner surface of the flange groove.

[0014] Furthermore, during installation, the joint of the two semicircular ring plates is misaligned with the end plates of the two semicircular encapsulation shells.

[0015] Furthermore, the encapsulation and insulation shell is made of high-strength polyethylene material. After the two semi-circular encapsulation shells are spliced ​​together, the joints between the two semi-circular encapsulation shells and the joints between the semi-circular encapsulation shells and the polyethylene outer tube are sealed with high-temperature silicone sealant.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. All components are standardized parts and prefabricated in the factory, ensuring stable and reliable quality. On-site assembly, fastening, and fastening are all simple, greatly shortening the construction cycle, reducing reliance on worker skills, and resulting in significant economic benefits.

[0018] 2. The design of the outer pipe slot, flange slot and insulation board ensures a smooth transition and seamless connection between the original insulation layer of the pipe and the new insulation layer at the connection, effectively preventing cold bridging and improving the insulation effect.

[0019] 3. The encapsulated insulation shell and the polyethylene outer tube are tightly connected through slots and end plates, and combined with high-temperature silicone sealant, forming multiple waterproof barriers that can effectively prevent groundwater intrusion.

[0020] 4. The prefabricated encapsulated insulation components are connected with bolts and nuts, which eliminates the need for destructive disassembly during later inspection and maintenance, enabling repeated installation and use, effectively reducing waste and saving maintenance costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a direct-buried heating pipeline insulation device according to the present invention;

[0022] Figure 2 This is a main cross-sectional view of the encapsulation and insulation shell and the polyurethane insulation layer described in this utility model;

[0023] Figure 3 This is a side view of the encapsulation and insulation shell and the polyurethane insulation layer described in this utility model;

[0024] Figure 4 This is a cross-sectional view of the insulation board described in this utility model;

[0025] In the picture:

[0026] 1. Prefabricated heating components; 11. Heating pipes; 12. Flanges; 13. Polyethylene outer pipes; 14. Polyurethane foam insulation material; 15. Sealing gaskets; 2. Prefabricated encapsulated insulation components; 21. Encapsulated insulation shell; 211. Semi-circular encapsulated shell; 212. Encapsulated end plate; 22. Polyurethane insulation layer; 221. Outer pipe slot; 222. Flange groove; 223. Heating pipe groove; 23. Filler insulation board; 231. Semi-circular ring plate; 232. Hexagonal groove. Detailed Implementation

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

[0028] This utility model provides a technical solution, such as Figures 1-4As shown; a direct-buried heating pipeline insulation device includes: a prefabricated heating component 1 and a prefabricated encapsulated insulation component 2, the prefabricated encapsulated insulation component 2 being installed between two sets of prefabricated heating components 1; the prefabricated heating component 1 includes a heating pipeline 11, a flange 12, a polyethylene outer pipe 13 and polyurethane foam insulation material 14, the flange 12 being welded to both ends of the heating pipeline 11, the polyethylene outer pipe 13 being fitted onto the outside of the heating pipeline 11, the two ends of the polyethylene outer pipe 13 being spaced a certain distance from the flange 12, the polyurethane foam insulation material 14 being filled between the polyethylene outer pipe 13 and the heating pipeline 11, the flange 12 between the two sets of prefabricated heating components 1 being fastened by bolts and nuts, and a sealing gasket 15 being clamped on the flange sealing surface.

[0029] In this embodiment of the utility model, the prefabricated heating component 1 is prefabricated in the factory, making it a standardized product, which ensures the stability and consistency of the quality of the main body of the pipeline, and at the same time ensures the heat insulation effect of the heating pipeline 11.

[0030] In this embodiment of the utility model, the end faces of the polyethylene outer pipe 13 and the polyurethane foam insulation material 14 are spaced a certain distance from the flange 12, which provides a clever and crucial interface for subsequent on-site connection, so as to achieve seamless transition and precise docking of the insulation layer, so as to facilitate the subsequent installation of the prefabricated internal working insulation component 2.

[0031] In this embodiment of the utility model, the end faces of the polyethylene outer tube 13 and the polyurethane foam insulation material 14 are separated from the flange 12, so that they are separated in space. The flange 12 is exposed to the outside, which facilitates mechanical operations such as bolt tightening. The insulation layer is formed in one piece in the factory, with the best quality, avoiding the problem of mutual interference between force sealing and heat sealing on site.

[0032] The prefabricated encapsulated insulation component 2 consists of an encapsulated insulation shell 21, a polyurethane insulation layer 22, and a filling insulation board 23. The encapsulated insulation shell 21 is formed by splicing two semi-circular encapsulated shells 211 and is fitted onto the polyethylene outer pipes 13 of the two sets of prefabricated heating components 1. The outer ends of the semi-circular encapsulated shells 211 are encapsulated end plates 212, and the encapsulated end plates 212 of the two semi-circular encapsulated shells 211 are fastened and fixed by bolts and nuts. The polyurethane insulation layer 22 is prefabricated inside the semi-circular encapsulated shells 211. After solidification, it has outer pipe slots 221 at both ends and a flange groove 222 at the center. The flange groove is connected to the two outer pipe slots by a heating pipe groove 22. 3. The diameter of the outer pipe slot 221 matches the outer diameter of the polyethylene outer pipe 13, and the diameter of the flange groove 222 matches the outer diameter of the flange 12. The insulation board 23 consists of two semi-circular ring plates 231, the inner diameter of which matches the outer diameter of the heating pipe 11, and the outer diameter of which is the same as the outer diameter of the flange 12. After the two semi-circular ring plates 231 are spliced, one side of its surface is flat and contacts the side surface of the flange groove 222. The shape of its other side surface matches the tenon shape of the flange 12, and a hexagonal groove 232 is provided on this surface. The size of the hexagonal groove 232 corresponds to the size of the bolts and nuts installed on the flange 12.

[0033] In this embodiment of the utility model, by utilizing the standardized design of the prefabricated heating component 1, the prefabricated encapsulated insulation component 2 can be prefabricated according to the structure after the prefabricated heating component 1 is connected. This transforms the insulation of the flange connection point, which is the most complex and difficult to control in terms of quality on site, into a standardized component prefabricated in the factory, thus completely eliminating the influence of human and environmental factors on quality. At the same time, the prefabricated encapsulated insulation component 2 can be quickly assembled and disassembled by utilizing its own structure.

[0034] In this embodiment of the utility model, the encapsulated heat insulation shell 21 adopts a splicing design with the encapsulation end plates 212 on two semi-circular encapsulation shells 211 docking, and is encapsulated by fastening with bolts and nuts, which facilitates quick snap-fit ​​installation on site, improves installation efficiency, and at the same time provides a rigid connection point and sealing reference surface for the entire component with the polyethylene outer tube 13.

[0035] In this embodiment of the utility model, the prefabricated design of the polyurethane insulation layer ensures that the foam density, uniformity, and insulation performance are all optimal, and the quality is far superior to that of on-site foaming, thus guaranteeing the insulation effect. The use of the outer tube slot 221 enables a "socket-type" connection with the polyethylene outer tube 13, ensuring close contact and smooth transition of the insulation material, fundamentally eliminating cold and thermal bridges. The precise design of the flange groove 222 provides precise accommodation space for the flange and bolt and nut group.

[0036] In this embodiment of the utility model, the filling insulation board 23 is the ingenious key to solving the problem of "irregular shape" after the flange 12 is spliced. By using the matching design of the side surface of the filling insulation board 23 and the tenon surface of the flange 12, the filling insulation board 23 is fully attached to the flange 12 and wrapped around the outside of the heating pipe 11. At the same time, the filling insulation board 23 and the flange 12 are perfectly embedded in the flange groove 12, so that the insulation layer at the entire connection becomes a continuous, uniform and weak point-free whole, ensuring the insulation effect at the flange 12 connection.

[0037] In this embodiment of the utility model, the prefabricated encapsulated insulation component 2 is also very easy to disassemble during later maintenance. During the disassembly process, the polyurethane insulation layer 22 and the filling insulation board 23 will not be damaged, avoiding destructive disassembly of the insulation layer and enabling it to be reused. Even if a component is damaged, the corresponding component can be replaced separately, reducing the cost and difficulty of later maintenance.

[0038] Furthermore, after the prefabricated encapsulated insulation component 2 is installed, the polyethylene outer tube 13 is inserted into the circular groove formed by the two outer tube slots 221, and the polyethylene outer tube 13 and the polyurethane foam insulation material 14 are in contact with the inner end face of the outer tube slot 221; thus achieving a smooth transition of the insulation layer between the prefabricated heating component 1 and the prefabricated encapsulated insulation component 2, ensuring the continuity of the insulation layer.

[0039] Furthermore, the insulation board 23 is installed on the heating pipe 11 and closely adheres to the tenon of the flange 12, forming a cylinder with the insulation board 23 and the flange 12. After the prefabricated encapsulated insulation component 2 is installed, the cylinder formed by the insulation board 23 and the flange 12 is inserted into the circular groove formed by the two flange grooves 222 and contacts the inner surface of the flange groove 222. This solves the insulation problem of the irregular shape at the flange 12 connection and achieves a customized tight wrapping, ensuring the insulation effect at the flange 12 connection.

[0040] Furthermore, during installation, the joints of the two semi-circular ring plates 231 are misaligned with the end plates 212 of the two semi-circular encapsulation shells 211, thereby improving the reliability of the seal and the overall structural integrity.

[0041] Furthermore, the encapsulated insulation shell 21 is made of high-strength polyethylene material. After the two semi-circular encapsulated shells 211 are spliced ​​together, the joints of the two semi-circular encapsulated shells 211 and the joints between the semi-circular encapsulated shells 211 and the polyethylene outer tube 13 are sealed with high-temperature silicone sealant; thus constructing a multi-layered and reliable passive waterproof defense system to ensure the sealing effect.

[0042] When using this utility model, firstly, align the two sets of prefabricated heating components 1 so that the flanges 12 on the two sets of prefabricated heating components 1 are aligned, and clamp the sealing gasket 15 between the two flanges 12. Then, use bolts and nuts to tighten the two flanges 12, and then connect the two sets of prefabricated heating components 1.

[0043] Then, the two insulation boards 23 are taken out and installed on the tenon of the two flanges 12 respectively. The insulation boards 23 are quickly installed on the tenon of the flanges 12 by using the quick splicing of the two semi-circular ring plates 231. During the installation process, the joint of the two semi-circular ring plates 231 is adjusted to a suitable position according to the angle of the docking position of the two semi-circular encapsulation shells 211. At the same time, the hexagonal groove 232 is aligned with the bolts and nuts on the flange 12 and the bolts and nuts are inserted into the hexagonal groove 232. After the installation is completed, the insulation boards 23 are manually pressed against the flanges 12.

[0044] Then, take out the two semi-circular encapsulation shells 211 and fasten them to the connection of the two sets of prefabricated heating components 1. During the fastening process, the polyethylene outer tubes 13 on the two sets of prefabricated heating components 1 are inserted into the circular grooves spliced ​​by the two outer tube slots 211, and the polyethylene outer tubes 13 are attached to the end face of the outer tube slots 211. Then, the installation position of the two semi-circular encapsulation shells 211 is positioned so that the cylinders formed by the filling insulation board 23 and the flange 12 on the two sets of prefabricated heating components 1 are just inserted into the flange groove 222 and are in complete contact with the inner wall of the flange groove 222.

[0045] Finally, the staff removed the bolts and nuts, tightened the encapsulation end plates 212 on the two semi-circular encapsulation shells 211, and applied high-temperature silicone sealant to all joints to form a completely reliable waterproof layer, thus completing the installation of the entire prefabricated encapsulation insulation component 2.

[0046] During later maintenance, the staff only needs to remove the bolts and nuts on the two semi-circular encapsulation shells 211 to separate the two semi-circular encapsulation shells 211. Then, the insulation board 23 can be removed to carry out the repair, replacement and other work on the pipeline. After the maintenance is completed, the prefabricated encapsulation insulation component 2 can be reinstalled at the connection of the two sets of prefabricated heating pipeline components 1 according to the above operation.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat preservation device for directly buried heating pipelines, characterized in that, include: Prefabricated heating components and prefabricated encapsulated insulation components, wherein the prefabricated encapsulated insulation components are installed between two sets of prefabricated heating components; The prefabricated heating assembly includes a heating pipe, flanges, a polyethylene outer pipe, and polyurethane foam insulation material. The flanges are welded to both ends of the heating pipe, and the polyethylene outer pipe is fitted onto the outside of the heating pipe. The two ends of the polyethylene outer pipe are spaced a certain distance from the flanges. The polyurethane foam insulation material is filled between the polyethylene outer pipe and the heating pipe. The flanges between the two sets of the prefabricated heating assemblies are fastened with bolts and nuts, and the flange sealing surface is fitted with a sealing gasket. The prefabricated encapsulated insulation component consists of an encapsulated insulation shell, a polyurethane insulation layer, and a filling insulation board. The encapsulated heat insulation shell is composed of two semi-circular encapsulated shells spliced ​​together and fitted onto the polyethylene outer tubes of the two sets of prefabricated heating components. The outer end of the semi-circular encapsulated shell is encapsulated with end plates, and the encapsulated end plates of the two semi-circular encapsulated shells are fastened and fixed by bolts and nuts. The polyurethane insulation layer is prefabricated in a semi-circular encapsulation shell. After solidification, it is provided with outer tube slots at both ends and a flange groove at the center. The flange groove is connected to the two outer tube slots through a heating pipe groove. The diameter of the outer tube slot matches the outer diameter of the polyethylene outer tube, and the diameter of the flange groove matches the outer diameter of the flange. The insulation board consists of two semi-circular ring plates. The inner diameter of the ring plates matches the outer diameter of the heating pipe, and the outer diameter of the ring plates matches the outer diameter of the flange. After the two semi-circular ring plates are spliced ​​together, one side of the ring plates is flat and contacts the side surface of the flange groove. The shape of the other side of the ring plates matches the shape of the flange tenon. A hexagonal groove is provided on this surface. The size of the hexagonal groove corresponds to the size of the bolts and nuts installed on the flange.

2. The insulation device for a direct-buried heating pipeline according to claim 1, characterized in that, After the prefabricated insulation component is installed, the polyethylene outer tube is inserted into the circular groove formed by two outer tube slots, and the polyethylene outer tube and polyurethane foam insulation material are in contact with the inner end face of the outer tube slot.

3. The insulation device for a direct-buried heating pipeline according to claim 1, characterized in that, The insulation board is installed on the heating pipe and is attached to the tenon of the flange. The insulation board and the flange form a cylinder.

4. The insulation device for a direct-buried heating pipeline according to claim 1, characterized in that, After the prefabricated insulation component is installed, the insulation board and the flange form a cylinder that is inserted into the circular groove formed by the two flange grooves and comes into contact with the inner surface of the flange groove.

5. The insulation device for a direct-buried heating pipeline according to claim 1, characterized in that, When the two semicircular ring plates are installed, their joints are misaligned with the end plates of the two semicircular encapsulation shells.

6. The insulation device for a direct-buried heating pipeline according to claim 1, characterized in that, The encapsulated heat-insulating shell is made of high-strength polyethylene. After the two semi-circular encapsulated shells are spliced ​​together, the joints between the two semi-circular encapsulated shells and the joints between the semi-circular encapsulated shells and the polyethylene outer tube are sealed with high-temperature silicone sealant.

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