Special polyethylene composite pipe for high-voltage cable

Abstract

The utility model provides a special polyethylene composite pipe for a high-voltage cable, which comprises a composite pipe body, a thermal insulation layer is arranged in the composite pipe body, a protective layer is arranged in the thermal insulation layer, and a working steel pipe layer is arranged in a reinforcing layer. According to the polyethylene composite pipe special for the high-voltage cable, the protective layer is made of the glass fiber material, and the glass fiber material has excellent mechanical performance and chemical stability, so that the overall structural strength of the composite pipe body of the high-voltage cable can be enhanced, and the composite pipe body can better bear external pressure and stress; meanwhile, the reinforcing layer is made of a polypropylene fiber material, and the polypropylene fiber material has certain tensile strength and crack resistance, so that the phenomenon that the composite pipe body cracks due to the fact that the composite pipe body is affected by the outside and the inside in the long-term use process is prevented, and the service life of the composite pipe body is prolonged. Therefore, the overall performance of the composite pipe body can be effectively improved through the protective layer and the reinforcing layer.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, and specifically relates to a polyethylene composite pipe special for high-voltage cables. Background Art

[0002] The polyethylene composite pipe is a pipe made by using two different density polyethylene resins, plasticizing and melting them through two extruders, and then simultaneously extruding them into a mold capable of forming a composite pipe. Its main characteristics are combining the advantages of metals and non-metals, such as compressive strength characteristics, high persistent mechanical strength, anti-corrosion and non-scaling, smooth and low resistance, heat preservation and non-waxing, wear resistance and light weight, etc.

[0003] The polyethylene composite pipe has a wide range of applications in multiple fields, such as urban building water supply and drainage, drinking water, natural gas, and gas transmission pipelines in municipal engineering; corrosive medium transmission pipes in the spinning, printing, and papermaking industries; corrosive gas, liquid, and solid powder transmission pipes in the chemical industry; gathering pipelines and pipes for transportation processes in oil and gas fields; sewage pipes and drainage pipes in the shipbuilding industry; in addition, it is also applied in fields such as seawater transportation, thermal power engineering, and highways.

[0004] When the existing polyethylene composite pipe special for high-voltage cables is in use, since the high-voltage cable will generate a certain amount of heat during operation, if the heat cannot be effectively controlled, it will cause the cable to overheat, affecting its normal operation and even triggering safety accidents, and further leading to the risk of fire caused by high temperature, thus reducing the safety of the cable system. At the same time, during the long-term use of the composite pipe, affected by external and internal factors, the composite pipe will crack, so the service life of the composite pipe is reduced. Content of the Utility Model

[0005] In view of the above defects or deficiencies in the prior art, the present application aims to provide a polyethylene composite pipe special for high-voltage cables, including a composite pipe body. An insulation layer is provided inside the composite pipe body, a heat insulation layer is provided inside the insulation layer, a protective layer is provided inside the heat insulation layer, a strengthening layer is provided inside the protective layer, and a working steel pipe layer is provided inside the strengthening layer. The insulation layer is made of high-density polyethylene material, the heat insulation layer is made of high-density polyethylene material, the protective layer is made of glass fiber material, and the strengthening layer is made of polypropylene fiber material.

[0006] Preferably, the insulation layer is installed on the inner wall of the composite pipe body.

[0007] Preferably, the heat insulation layer is installed on the inner wall of the insulation layer.

[0008] Preferably, the protective layer is installed on the inner wall of the heat insulation layer.

[0009] Preferably, the reinforcing layer is installed on the inner wall of the protective layer, and the working steel pipe layer is installed on the inner wall of the reinforcing layer.

[0010] Beneficial effects:

[0011] 1. For this special polyethylene composite pipe for high-voltage cables, there are a heat-insulating layer and a thermal-insulating layer inside the composite pipe body, and the materials of both the heat-insulating layer and the thermal-insulating layer are made of high-density polyethylene. Due to the excellent chemical corrosion resistance, electrical insulation performance, and good processing performance of high-density polyethylene, when used as a heat-insulating material and a thermal-insulating material, high-density polyethylene has a high thermal resistance value, which can effectively prevent heat transfer and reduce heat loss. Thus, through the heat-insulating layer and the thermal-insulating layer, heat transfer inside and outside the pipe can be effectively blocked, and the temperature inside the pipe can be kept stable. Since a certain amount of heat is generated when high-voltage cables are operating, if the heat cannot be effectively controlled, it will cause the cable to overheat, affecting its normal operation and even leading to safety accidents. By doing so, the fire risk caused by high temperature can be reduced, the safety of the cable system can be improved, and further, the stability and reliability of the composite pipe body during long-term use can be ensured.

[0012] 2. For this special polyethylene composite pipe for high-voltage cables, since the protective layer uses fiberglass material, which has excellent mechanical properties and chemical stability, it can enhance the overall structural strength of the high-voltage cable composite pipe body, enabling the composite pipe body to better withstand external pressure and stress, improving its durability and service life. At the same time, since the reinforcing layer uses polypropylene fiber material, which has a certain tensile strength and crack resistance, it can prevent the composite pipe body from cracking due to external and internal influences during long-term use. Thus, through the protective layer and the reinforcing layer, the overall performance of the composite pipe body can be effectively improved. Description of the Drawings

[0013] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes, and advantages of this application will become more obvious:

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the special polyethylene composite pipe for high-voltage cables of the present utility model;

[0015] Figure 2 It is a front-view structural schematic diagram of the special polyethylene composite pipe for high-voltage cables of the present utility model;

[0016] Figure 3 It is a right-view structural schematic diagram of the special polyethylene composite pipe for high-voltage cables of the present utility model.

[0017] In the figure: 1. Composite pipe body; 2. Heat-insulating layer; 3. Thermal-insulating layer; 4. Protective layer; 5. Reinforcing layer; 6. Working steel pipe layer. Detailed implementation mode

[0018] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model and do not limit the utility model. In addition, it should be noted that for the sake of description, only the parts related to the utility model are shown in the drawings.

[0019] The accompanying drawings in the embodiments of the present utility model: Different types of hatching lines in the drawings are not marked according to the national standard, nor are the materials of the components required. They are used to distinguish the cross-sectional views of the components in the drawings.

[0020] Please refer to Figures 1-3 , a polyethylene composite pipe special for high-voltage cables, including a composite pipe body 1. A heat preservation layer 2 is arranged inside the composite pipe body 1. A heat insulation layer 3 is arranged inside the heat preservation layer 2. A protection layer 4 is arranged inside the heat insulation layer 3. A strengthening layer 5 is arranged inside the protection layer 4. A working steel pipe layer 6 is arranged inside the strengthening layer 5.

[0021] Among them, the heat preservation layer 2 is installed on the inner wall of the composite pipe body 1, and the heat preservation layer 2 is made of high-density polyethylene material.

[0022] Among them, the heat insulation layer 3 is installed on the inner wall of the heat preservation layer 2, and the heat insulation layer 3 is made of high-density polyethylene material.

[0023] Among them, the protection layer 4 is installed on the inner wall of the heat insulation layer 3, and the protection layer 4 is made of glass fiber material.

[0024] Among them, the strengthening layer 5 is installed on the inner wall of the protection layer 4. The strengthening layer 5 is made of polypropylene fiber material, and the working steel pipe layer 6 is installed on the inner wall of the strengthening layer 5.

[0025] In use, there is a thermal insulation layer 2 and a heat insulation layer 3 inside the composite pipe body 1. The materials of both the thermal insulation layer 2 and the heat insulation layer 3 are made of high-density polyethylene. Due to the excellent chemical corrosion resistance, electrical insulation performance and good processing performance of high-density polyethylene, when used as thermal insulation material and heat insulation material, high-density polyethylene has a high thermal resistance value, can effectively prevent heat transfer, reduce heat loss. Thus, through the thermal insulation layer 2 and the heat insulation layer 3, heat transfer inside and outside the pipeline can be effectively blocked, and the temperature inside the pipeline can be kept stable. Since a certain amount of heat is generated when the high-voltage cable is operating, if the heat cannot be effectively controlled, it will cause the cable to overheat, affecting its normal operation and even leading to safety accidents. It can reduce the fire risk caused by high temperature, improve the safety of the cable system, and further ensure the stability and reliability of the composite pipe body 1 during long-term use. The protective layer 4 is made of fiberglass material. Fiberglass material has excellent mechanical properties and chemical stability, which can enhance the overall structural strength of the high-voltage cable composite pipe body 1, enabling the composite pipe body 1 to better withstand external pressure and stress, improving its durability and service life. At the same time, the reinforcing layer 5 is made of polypropylene fiber material. Polypropylene fiber material has a certain tensile strength and crack resistance, preventing the composite pipe body 1 from cracking due to external and internal influences during long-term use. Thus, through the protective layer 4 and the reinforcing layer 5, the overall performance of the composite pipe body 1 can be effectively improved.

[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with embodiments to detail the present application.

[0027] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the utility model. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A polyethylene composite pipe for high voltage cables, comprising a composite pipe body (1), characterized in that: The composite pipe body (1) is provided with a heat-insulating layer (2) inside, a heat-insulating layer (3) inside, a protective layer (4) inside, a reinforcing layer (5) inside, and a working steel pipe layer (6) inside the reinforcing layer (5), the heat-insulating layer (2) is made of high-density polyethylene material, the heat-insulating layer (3) is made of high-density polyethylene material, the protective layer (4) is made of glass fiber material, and the reinforcing layer (5) is made of polypropylene fiber material.

2. The polyethylene composite pipe for high voltage cable according to claim 1, characterized in that: The thermal insulation layer (2) is installed on the inner wall of the composite pipe body (1).

3. The polyethylene composite pipe for high voltage cable according to claim 1, characterized in that: The heat insulating layer (3) is installed on the inner wall of the thermal insulation layer (2).

4. The polyethylene composite pipe for high voltage cable according to claim 1, characterized in that: The protective layer (4) is installed on the inner wall of the heat insulation layer (3).

5. The polyethylene composite pipe for high voltage cable according to claim 1, characterized in that: The reinforcement layer (5) is installed on the inner wall of the protective layer (4), and the working steel pipe layer (6) is installed on the inner wall of the reinforcement layer (5).

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