Insulation layer structure for joint coating of polyvinyl chloride outer sheath insulation pipe

Abstract

The utility model relates to a joint coating heat preservation layer structure of a polyvinyl chloride outer sheath heat preservation pipe. The joint coating heat preservation layer structure comprises a first pipeline, a second pipeline, a foam heat preservation layer and a communicating socket type connecting piece. The first pipeline is sequentially wrapped with a first heat preservation layer and a first outer protection layer. The second pipeline is sequentially wrapped with a second heat preservation layer and a second outer protection layer. A joint coating area is arranged between the first heat preservation layer and the second heat preservation layer, and the foam heat preservation layer is located in the joint coating area. The two ends of the communicating socket type connecting piece are bonded to the upper portion of the first outer protective layer and the upper portion of the second outer protective layer through bonding glue respectively, gaps between the communicating socket type connecting piece and the first outer protective layer and gaps between the communicating socket type connecting piece and the second outer protective layer are processed through welding rods, then heat-shrinkable tape winding is matched, and joint coating reinforcement is carried out. The problems of poor joint performance and poor sealing effect between pipeline heat preservation layers are effectively solved, and the efficiency and the heat preservation effect of the heat preservation pipe in the construction process are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the structure and construction of socket-type insulating pipes, and particularly relates to a joint insulating layer structure for a polyvinyl chloride outer sheath insulating pipe. Background Art

[0002] The statements herein only provide the background art related to the utility model, and do not necessarily constitute the prior art.

[0003] In recent years, prefabricated directly buried insulating pipes have been widely used in the primary heat supply pipeline system due to their convenient construction and good energy-saving and anti-corrosion effects. During the pipeline construction process, there will be a certain gap between the insulating layers at the two pipe ends after the installation of the two pipes. To ensure the insulating effect of the whole pipeline, the port treatment is carried out at the interface after the butt welding or socket installation of the working steel pipes. The conventional polyethylene outer sheath pipe is sleeved with a heat-shrinkable tape, and then a special polyurethane on-site foaming machine is used for foaming and filling the insulating layer. After filling, the filling hole is sealed. However, the above method is not applicable to the polyvinyl chloride outer sheath insulating pipe. Since the strength of polyvinyl chloride is more than twice that of polyethylene, the outer sheath insulating pipe made of polyvinyl chloride has higher strength. Therefore, when using the traditional heat-shrinkable tape to treat the port of the polyvinyl chloride outer sheath insulating pipe, there are often problems such as poor jointing and poor sealing effect, which greatly reduces the efficiency and insulating effect of the insulating pipe during the construction process. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a joint insulating layer structure for a polyvinyl chloride outer sheath insulating pipe, which includes a first pipe, a second pipe, a foam insulating layer and a connecting socket-type connector;

[0005] A first insulating layer and a first outer layer are sequentially arranged outside the first pipe; a second insulating layer and a second outer layer are sequentially arranged outside the second pipe; a joint area is formed between the first insulating layer and the second insulating layer, and the foam insulating layer is located in the joint area; both ends of the connecting socket-type connector are adhesively bonded above the first outer layer and the second outer layer; the connecting socket-type connector is also connected to the first outer layer and the second outer layer by welding; the connection parts of the connecting socket-type connector and the first outer layer and the second outer layer are wound with a heat-shrinkable tape.

[0006] As a further technical solution, the inner diameter of the connecting socket-type connector is matched with the outer diameters of the first outer layer and the second outer layer.

[0007] As a further technical solution, both ends of the connecting socket-type connector are adhesively bonded above the first outer layer and the second outer layer by PVC adhesive.

[0008] As a further technical solution, the first outer layer and the second outer layer are made of polyvinyl chloride.

[0009] As a further technical solution, injection holes and exhaust holes are also provided above the communicating socket connector.

[0010] As a further technical solution, the communicating socket connector is made of polyvinyl chloride.

[0011] As a further technical solution, the foam insulation layer is made by mixing isocyanate and polyether polyol.

[0012] As a further technical solution, the communicating socket connector is also welded to the first outer protective layer and the second outer protective layer by a polyvinyl chloride welding rod.

[0013] As a further technical solution, both the first insulation layer and the second insulation layer are made of polyurethane.

[0014] As a further technical solution, the first insulation layer, the second insulation layer and the foam insulation layer have the same thickness.

[0015] Advantages of the above one or more technical solutions:

[0016] Using the communicating socket connector as the joint structure of the polyvinyl chloride outer sheath polyurethane insulating pipe, and strengthening the joint through a special adhesive, a sealing welding rod and a heat shrinkable tape, so that the first outer protective layer and the second outer protective layer form an integral body with the communicating socket connector, perfectly solving problems such as poor joint performance and poor sealing effect between the pipeline insulation layers, and can greatly improve the efficiency and insulation effect of the insulating pipe during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation to this application.

[0018] Figure 1 It is a schematic structural diagram of the present utility model.

[0019] In the figure, 1, the first pipeline; 2, the first insulation layer; 3, the first outer protective layer; 4, the heat shrinkable tape; 5, the PVC adhesive; 6, the foam insulation layer; 7, the second pipeline; 8, the second insulation layer; 9, the second outer protective layer; 10, the communicating socket connector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following combines with the attached Figure 1 , to illustrate the specific implementation manners of this embodiment.

[0021] During the construction of heating pipelines, there is often a certain gap between the insulation layers of two heating pipelines. To ensure the insulation effect of the heating pipelines, the ports are often processed through a joint structure after butt welding or socket installation of the pipelines. The embodiment of the present application provides a joint insulation layer structure for a polyvinyl chloride outer sheath insulation pipe. Refer to Figure 1 , a joint insulation layer structure for a polyvinyl chloride outer sheath insulation pipe, including a first pipeline 1, a second pipeline 7, a foam insulation layer 6, and a communicating socket connector 10; wherein, the first pipeline 1 and the second pipeline 7 are welded, and a joint structure is arranged in the welding area to enhance the insulation effect of the pipeline.

[0022] The first pipeline 1 is wrapped with a first insulation layer 2, and a first outer protection layer 3 is further covered outside the first insulation layer 2; the second pipeline 7 is wrapped with a second insulation layer 8, and a second outer protection layer 9 is covered outside the second insulation layer 8. Both the first insulation layer 2 and the second insulation layer 8 are made of polyurethane material, and the first outer protection layer 1 and the second outer protection layer 9 are made of polyvinyl chloride material. The area between the first insulation layer 2 and the second insulation layer 8 is the joint area; the foam insulation layer 6 is located between the first insulation layer 2 and the second insulation layer 8, that is, within the joint area. And the thicknesses of the first insulation layer 2, the second insulation layer 8, and the foam insulation layer 6 are the same.

[0023] The communicating socket connector 10 is a cylindrical structure made of polyvinyl chloride and can play a role in supporting and communicating. The inner diameter of the communicating socket connector 10 basically matches the outer diameters of the first outer protection layer 3 and the second outer protection layer 9, enabling the communicating socket connector 10 to move freely between the first outer protection layer 3 and the second outer protection layer 9 during the installation process to select a suitable installation position. At the same time, an injection hole and an exhaust hole are respectively opened on the communicating socket connector. Isocyanate and polyether polyol are used as foaming raw materials, and a catalyst is added thereto, and then injected into the joint area through the injection hole, and the air in the joint area is discharged through the exhaust hole. Finally, a foam insulation layer 6 is formed in the joint area. After the foam insulation layer 6 is formed, the injection hole and the exhaust hole need to be sealed.

[0024] Both ends of the communicating socket connector are respectively bonded above the first outer protection layer 3 and the second outer protection layer 9 through a PVC adhesive 5. The PVC adhesive 5 has excellent properties such as water resistance, heat resistance, acid resistance, alkali resistance, corrosion resistance, oil resistance, and no whitening, and can ensure the firm connection between the communicating socket connector 10 and the first outer protection layer 3 and the second outer protection layer 9 made of polyvinyl chloride material. To further ensure the bonding effect, the communicating socket connector, the first outer protection layer 3, and the second outer protection layer 9 are roughened with a steel brush before bonding.

[0025] In addition, in this embodiment, in order to further enhance the connection effect between the socket-and-spigot connector and the first outer layer 3 and the second outer layer 9, and to prevent the influence of voids on the heat insulation effect, the voids between the socket-and-spigot connector and the first outer layer 3 and the second outer layer 9 are also welded by a PVC welding rod. The PVC welding rod is a solid strip product and has good weldability in cooperation with PVC.

[0026] A heat shrinkable tape 4 is also wound around the connection part connecting the socket-and-spigot connector and the first outer layer 3 and the second outer layer 9, which can further improve the sealing effect.

[0027] Specifically, the usage method is as follows:

[0028] First, use a steel brush to roughen the inner surface and the outer surface of the connecting socket-and-spigot connector 10, and also roughen the first outer layer 3 and the second outer layer 9. Secondly, bond the two ends of the connecting socket-and-spigot connector 10 to the roughened first outer layer 3 and the second outer layer 9 through a PVC adhesive 5; use a PVC welding rod to weld the voids between the connecting socket-and-spigot connector 10 and the first outer layer 3 and the second outer layer 9, and use a heat shrinkable tape 4 to wrap and wind the connection part of the connecting socket-and-spigot connector 10 and the first outer layer 3 and the second outer layer 9. Finally, inject a foaming material into the repair area through the injection hole on the connecting socket-and-spigot connector 10 to form a foam heat insulation layer 6, and seal the injection hole and the exhaust hole after the foam heat insulation layer 6 is formed.

[0029] Although the specific implementation manners of the present invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A structure of the supplementary insulation layer for the PVC outer sheath heat-insulating pipe, characterized in that Including: A first pipeline, a second pipeline, a foam insulation layer, and a connecting socket-and-spigot joint; A first insulation layer and a first outer protective layer are successively provided outside the first pipeline; a second insulation layer and a second outer protective layer are successively provided outside the second pipeline; a joint area is formed between the first insulation layer and the second insulation layer, and the foam insulation layer is located within the joint area; both ends of the connecting socket-and-spigot joint are adhesively bonded above the first outer protective layer and the second outer protective layer; the connecting socket-and-spigot joint is also connected to the first outer protective layer and the second outer protective layer by welding; a heat shrinkable tape is wound around the connection between the connecting socket-and-spigot joint and the first outer protective layer and the second outer protective layer.

2. The structure of the supplementary insulation layer for the PVC outer sheath heat-insulating pipe according to claim 1, characterized in that, The inner diameter of the connecting socket-and-spigot joint is in conformity with the outer diameters of the first outer protective layer and the second outer protective layer.

3. The structure of the supplementary insulation layer for the PVC outer sheath heat-insulating pipe according to claim 1, wherein, Both ends of the connecting socket-and-spigot joint are adhesively bonded above the first outer protective layer and the second outer protective layer by PVC adhesive.

4. The structure of the supplementary insulation layer for the PVC outer sheath heat-insulating pipe according to claim 1, wherein, The first outer protective layer and the second outer protective layer are made of polyvinyl chloride.

5. The structure of the supplementary insulation layer for the PVC outer sheath insulation pipe according to claim 1, wherein, An injection hole and an exhaust hole are also provided above the connecting socket-and-spigot joint.

6. The structure of the supplementary insulating layer for the PVC outer sheath insulating pipe according to claim 1, characterized in that The connecting socket-and-spigot joint is made of polyvinyl chloride.

7. The structure of the supplementary insulation layer for the PVC outer sheath insulation pipe according to claim 1, characterized in that The connecting socket-and-spigot joint is welded to the first outer protective layer and the second outer protective layer by a polyvinyl chloride electrode.

8. The structure of the supplementary insulation layer for the PVC outer sheath insulation pipe as described in claim 1, characterized in that, Both the first insulation layer and the second insulation layer are made of polyurethane.

9. The structure of the supplementary insulation layer for the PVC outer sheath insulation pipe according to claim 1, characterized in that, The first insulation layer, the second insulation layer, and the foam insulation layer have the same thickness.

Images