Sealing structure for end part of insulating layer of prefabricated directly-buried insulating pipe
By setting the end cap structure and sealant at the end of the insulation layer, the problem of the heat shrink belt failing due to temperature influence is solved, and effective sealing and thermal energy retention of the insulation layer are achieved.
Patent Information
- Application Number
- CN202422371314.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In the prior art, the adhesive in the heat shrink belt or sleeve is affected by the temperature of the working tube, resulting in seal failure, water inlet in the insulation layer, causing the insulation layer to lose its insulation effect and large thermal energy loss.
An end cap structure is arranged at the end of the insulation layer, the sealing plate is welded to the working tube, the extension cylinder and the protective tube are connected by a heat shrink belt, and sealant is filled in the gap between the two to enhance the sealing property.
Effectively prevent external water from entering the insulation layer, ensure safe operation of the hot water pipeline network, and maintain good sealing performance and insulation effect.
Smart Images
Figure CN223121007U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat preservation pipe sealing structures, and particularly relates to an end sealing structure of a heat preservation layer of a prefabricated directly buried heat preservation pipe. Background Art
[0002] When installing a heat supply network, the end of the heat preservation layer of a prefabricated directly buried hot water heat preservation pipe often needs to be sealed. At present, in engineering practice, generally a heat shrinkable tape or sleeve is used to heat shrink and seal the end of the heat preservation layer from the outer protective pipe to the outer surface of the working pipe.
[0003] Since the heat shrinkable tape or sleeve uses the adhesive layer on its inner surface to adhesively seal the working pipe and the polyethylene outer protective pipe, affected by the temperature of the working pipe, the adhesive often loses its sealing effect, resulting in sealing failure, water ingress into the heat preservation layer, and ultimately the heat preservation layer losing its heat preservation function and large heat energy loss. Summary of the Utility Model
[0004] The utility model provides an end sealing structure of a heat preservation layer of a prefabricated directly buried heat preservation pipe, aiming at solving the problem that since the heat shrinkable tape or sleeve uses the adhesive layer on its inner surface to adhesively seal the working pipe and the polyethylene outer protective pipe, affected by the temperature of the working pipe, the adhesive often loses its sealing effect, resulting in sealing failure, water ingress into the heat preservation layer, and ultimately the heat preservation layer losing its heat preservation function and large heat energy loss.
[0005] The utility model is realized as follows: an end sealing structure of a heat preservation layer of a prefabricated directly buried heat preservation pipe includes a working pipe, a tubular heat preservation layer is sleeved on the outer surface of the working pipe, and a protective pipe is fixedly connected to the outer surface of the heat preservation layer;
[0006] The front ends of the protective pipe and the heat preservation layer are flush, the front end of the working pipe extends to the front parts of the protective pipe and the heat preservation layer, and an end cap structure is arranged at the front ends of the protective pipe and the heat preservation layer.
[0007] Preferably, the end cap structure includes a sealing disc with a through hole transversely penetrating the front side surface and adapted to the outer diameter of the working pipe, the outer diameter of the sealing disc is larger than the outer diameter of the protective pipe, and a rear side surface at the outer edge of the sealing disc extends backward to form an extension cylinder sleeved on the outer surface of the protective pipe.
[0008] Preferably, a heat shrinkable tape is fixedly connected between the rear end of the outer surface of the extension cylinder and the outer surface of the protective pipe.
[0009] Preferably, the end cap structure is made of stainless steel.
[0010] Preferably, a sealing glue is filled between the inner surface of the extension cylinder and the outer surface of the protective pipe.
[0011] Preferably, the sealing disc and the working pipe are fixedly connected by welding.
[0012] Beneficial effects
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the end sealing structure of the insulation layer of the prefabricated directly buried heat-insulated pipe of the present utility model, by providing an end cap structure, this sealing structure adds an end cap structure on top of the ordinary sealing structure. The sealing disc of the end cap structure is directly welded to the working pipe, ensuring the sealing performance. Then, the extension cylinder at its rear end is connected to the protective pipe through a heat shrinkable band, thus ensuring the sealing at both ends. At the same time, the gap between the extension cylinder and the protective pipe is filled with sealant for further sealing, which can completely prevent external water from entering the interior of the insulation layer and ensure the safe operation of the hot water pipe network. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a half-sectional structural view of the present utility model;
[0015] Figure 2 is a structural view of the end cap structure of the present utility model;
[0016] Figure 3 is Figure 1 a partially enlarged view of the area at A in
[0017] In the figure: 1 - working pipe, 2 - insulation layer, 3 - protective pipe, 4 - end cap structure, 5 - heat shrinkable band, 6 - through hole, 7 - sealant. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0019] Please refer to Figures 1-3 , the present utility model provides a technical solution: An end sealing structure for the insulation layer of a prefabricated directly buried heat-insulated pipe, including a working pipe 1, a tubular insulation layer 2 is sleeved on the outer surface of the working pipe 1, and a protective pipe 3 is fixedly connected to the outer surface of the insulation layer 2;
[0020] The front ends of the protective pipe 3 and the insulation layer 2 are flush, the front end of the working pipe 1 extends to the front of the protective pipe 3 and the insulation layer 2, and an end cap structure 4 is provided at the front ends of the protective pipe 3 and the insulation layer 2.
[0021] The end cap structure 4 includes a sealing disc with a through hole 6 transversely opened on the front side surface and adapted to the outer diameter of the working pipe 1. The outer diameter of the sealing disc is larger than the outer diameter of the protective pipe 3, and the rear side surface of the outer edge of the sealing disc extends backward to form an extension cylinder sleeved on the outer surface of the protective pipe 3.
[0022] A heat shrinkable tape 5 is fixedly connected between the rear end of the outer surface of the extension cylinder and the outer surface of the protective pipe 3.
[0023] Sealing glue 7 is filled between the inner surface of the extension cylinder and the outer surface of the protective pipe 3.
[0024] The sealing disc and the working pipe 1 are fixedly connected by welding.
[0025] In this embodiment, during actual processing of this structure, first, the insulation layer 2 and the end of the protective pipe 3 of the prefabricated directly buried hot water insulation pipe are cut flush. Then, the residual foam and other attachments on the surface of the end of the working pipe 1 are cleaned. After that, the end cap sleeve structure 4 is installed at the ends of the protective pipe 3 and the insulation layer 2, and the sealing disc of the end cap structure 4 and the working pipe 1 are connected by welding to complete the sealing between the end cap structure 4 and the working pipe 1. Then, sealing glue 7 is filled into the gap between the extension cylinder of the end cap structure 4 and the protective pipe 3 to achieve the sealing between the two gaps. Finally, the rear end of the extension cylinder of the end cap structure 4 and the overlapping end of the outer part of the protective pipe 3 are shrink-sealed with the heat shrinkable tape 5, thereby completing the sealing at both ends of the end cap structure 4.
[0026] The sealing disc of the end cap structure 4 is directly welded to the working pipe 1, ensuring the sealing performance. Then, the extension cylinder at its rear end is connected to the protective pipe 3 through the heat shrinkable tape 5, which also ensures the sealing at both ends. At the same time, sealing glue 7 is filled into the gap between the extension cylinder and the protective pipe 3 for further sealing, which can completely prevent external water from entering the inside of the insulation layer and ensure the safe operation of the hot water pipe network.
[0027] Furthermore, the end cap structure 4 is made of stainless steel.
[0028] In this embodiment, stainless steel has a long service life, good protective effect, and can meet the sealing requirements under any temperature conditions of the hot pipe network.
[0029] The working principle and usage process of the present utility model: After the present utility model is installed, this sealing structure adds the end cap structure 4 on the basis of the ordinary sealing structure. The sealing disc of the end cap structure 4 is directly welded to the working pipe 1, ensuring the sealing performance. Then, the extension cylinder at its rear end is connected to the protective pipe 3 through the heat shrinkable tape 5, which also ensures the sealing at both ends. At the same time, sealing glue 7 is filled into the gap between the extension cylinder and the protective pipe 3 for further sealing, which can completely prevent external water from entering the inside of the insulation layer and ensure the safe operation of the hot water pipe network.
[0030] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A prefabricated directly buried thermal insulation pipe thermal insulation layer end sealing structure, characterized in that: It includes a working pipe (1), a tubular heat insulation layer (2) is sleeved on the outer surface of the working pipe (1), and a protective pipe (3) is fixedly connected to the outer surface of the heat insulation layer (2); The front ends of the protective pipe (3) and the heat insulation layer (2) are flush, the front end of the working pipe (1) extends to the front parts of the protective pipe (3) and the heat insulation layer (2), and an end cap structure (4) is arranged at the front ends of the protective pipe (3) and the heat insulation layer (2).
2. The end sealing structure of the insulation layer of a prefabricated directly buried insulating pipe as described in claim 1, characterized in that: The end cap structure (4) includes a sealing disc with a through hole (6) transversely penetrating through the front side surface and adapted to the outer diameter of the working pipe (1), the outer diameter of the sealing disc is larger than the outer diameter of the protective pipe (3), and a rear side surface of the outer edge of the sealing disc extends backward to form an extension cylinder sleeved on the outer surface of the protective pipe (3).
3. A thermal insulation layer end sealing structure of a prefabricated directly buried thermal insulation pipe as described in claim 2, characterized in that: A heat shrinkable tape (5) is fixedly connected between the rear end of the outer surface of the extension cylinder and the outer surface of the protective pipe (3).
4. A thermal insulation layer end sealing structure of a prefabricated directly buried thermal insulation pipe as described in claim 1, characterized in that: The end cap structure (4) is made of stainless steel.
5. The end sealing structure of the thermal insulation layer of a prefabricated directly buried thermal insulation pipe according to claim 2, characterized in that: A sealing glue (7) is filled between the inner surface of the extension cylinder and the outer surface of the protective pipe (3).
6. The end sealing structure of the insulation layer of a prefabricated directly buried insulation pipe according to claim 2, characterized in that: The sealing disc and the working pipe (1) are fixedly connected by welding.