High-thermal-conductivity cable protection pipe and preparation method thereof

Abstract

The invention belongs to the technical field of cable protection tubes, and discloses a high-thermal-conductivity cable protection tube and a preparation method thereof.The high-thermal-conductivity cable protection tube comprises aluminum alloy, copper alloy, a composite material and thermal conductive plastic, the component ratio of the aluminum alloy to the copper alloy to the composite material to the thermal conductive plastic is 60: 20: 10: 10, the aluminum alloy is 6063 aluminum alloy, the copper alloy is C11000 copper, and the composite material is aluminum alloy. The composite material is a metal matrix composite material and a ceramic filler composite material, the heat-conducting property can be improved by arranging the high-heat-conducting filler, the heat-conducting particles, the ceramic filler composite material, the plasticizer and the graphite, the plasticizer is glass fiber and carbon fiber, and the plasticizer can make a polymer matrix softer and reduce brittleness; the glass fiber and carbon fiber composite material has the advantages of improved impact resistance and prolonged fatigue life, the plasticizer makes the matrix material easier to form, process and coat, the production efficiency is improved, and the plasticizer can optimize the molecular structure and improve the interface bonding force, thereby enhancing the mechanical properties of the composite material.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable protection tubes, and specifically relates to a high thermal conductivity cable protection tube and a preparation method thereof. Background Art

[0002] Cable protection tube is a kind of pipe used to protect power, telecommunications, optical cables and cable lines. Its main function is to prevent external physical and chemical factors from damaging the cables. Cable protection tube is usually made of corrosion-resistant and high-compressive-strength materials. It has weather resistance and mechanical strength. It can ensure the stable operation of cables in the environment, reduce the impact of the external environment on the cables, and ensure the safety and stability of the power supply system. The external environment includes fire and electromagnetic interference. Cable protection tube helps with the laying and construction of cables, and it is easier to locate and replace cables during maintenance.

[0003] However, the existing high thermal conductivity cable protection tube and its preparation method are not perfect and still have certain defects:

[0004] The cable will generate heat during operation. If the thermal conductivity of the cable protection tube is poor, the heat cannot be dissipated in time, which will cause the cable temperature to be high, thus affecting the service life of the cable. In an alternating hot and cold environment, the low thermal conductivity of the cable protection tube will lead to a large temperature difference between the inside and outside of the tube, causing stress concentration and material aging. No plasticizer is added during the preparation of the cable protection tube, so it is easy to break and rupture under mechanical impact and external force. Summary of the invention

[0005] The object of the present invention is to provide a high thermal conductivity cable protection tube and a preparation method thereof, so as to solve the problem that the low thermal conductivity of the cable protection tube proposed in the above background technology will lead to a large temperature difference between the inside and outside of the tube, causing stress concentration and material aging, and no plasticizer is added during the preparation of the cable protection tube, so it is easy to break and rupture under mechanical impact and external force.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a high thermal conductivity cable protection tube, comprising aluminum alloy, copper alloy, composite material and thermal conductive plastic, wherein the proportion of the components of the aluminum alloy, copper alloy, composite material and thermal conductive plastic is 60:20:10:10, the aluminum alloy is 6063 aluminum alloy, the copper alloy is C11000 copper, the composite material is a metal-based composite material and a ceramic filler composite material, and the thermal conductive plastic is polyimide, polycarbonate and polyethylene.

[0007] Preferably, the metal-based composite material is an aluminum-based composite material, the ceramic filler composite material is graphite, and the proportion of each component of polyimide, polycarbonate and polyethylene is 40:50:10.

[0008] Preferably, the metal material, composite material and thermally conductive plastic are mixed with a resin matrix and a high thermal conductivity filler, and a plasticizer is added. The high thermal conductivity filler can improve the thermal conductivity of the material. The mixed raw materials are fed into an extruder, extruded and molded by heating and pressurizing, and formed into the desired tubular shape through a mold.

[0009] Preferably, the plasticizer is glass fiber and carbon fiber, the high thermal conductivity filler is ceramic particles, the heating temperature is between 200-220° C., and the heating time is 20-60 minutes.

[0010] Preferably, the cable protection tube after extrusion is cooled and shaped by air cooling equipment, and the cooling air is controlled between 20° C. and 50° C., and the wind speed is 10-20 m / s.

[0011] Preferably, a thermally conductive coating is applied on the surface of the cable protection tube: the thermally conductive coating is copper, and the thermally conductive coating is applied to the outer surface of the finished tube by spraying, and the coating is heat treated to improve the adhesion and durability of the coating.

[0012] Preferably, the thermal conductivity and ductility of the cable protection tube are improved by eliminating the stress in the material, and the cable protection tube is subjected to a thermal conductivity test, a mechanical property test and a dimensional accuracy check.

[0013] A method for preparing a high thermal conductivity cable protection tube comprises the following steps:

[0014] S1: The selected metal material, composite material and thermal conductive plastic are mixed evenly to ensure the thermal conductivity of the material, a resin matrix, a high thermal conductive filler and a plasticizer are added therein, and the mixed raw materials are fed into an extruder. The extruded high thermal conductive cable protection tube is cooled by an air cooling device and solidified into a shape;

[0015] S2: The cooling air temperature is controlled between 20℃-50℃, and the wind speed is 10-20m / s. The cooled pipe needs to be placed in a shaping ring, and the shaping ring temperature is controlled at 40℃-100℃. The thermal conductive coating is applied to the outer surface of the finished pipe by spraying, and the coating is heat treated to improve the adhesion and durability of the coating;

[0016] S3: Heat the finished tube to 200°C and keep it at this temperature for 30 minutes to avoid deformation caused by thermal stress;

[0017] S4: Use a thermal conductivity tester to measure the thermal conductivity of the cable protection tube, use a tensile testing machine to measure the tensile strength and elongation of the cable protection tube under tension, use an internal diameter gauge to measure the inner diameter of the cable protection tube, and use a laser measuring instrument to achieve non-contact dimensional measurement.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention provides high thermal conductivity fillers, thermal conductive particles, ceramic filler composite materials and plasticizers. Graphite can improve thermal conductivity. The plasticizers are glass fibers and carbon fibers. The plasticizers can make the polymer matrix softer and reduce brittleness, thereby improving the impact resistance and fatigue life of the glass fiber and carbon fiber composite materials. The plasticizers make the matrix material easier to shape, process and coat, which helps to reduce the processing temperature and improve production efficiency. The plasticizers can optimize the molecular structure and improve the interface adhesion, thereby enhancing the mechanical properties of the composite materials.

[0020] 2. The present invention provides an aluminum-based composite material, a shaping ring, a resin matrix and polyimide. The aluminum-based composite material can enhance the mechanical strength, hardness and wear resistance of aluminum. The composite material can maintain thermal conductivity. The polyimide has high temperature resistance and thermal conductivity, and maintains the formability and processability of the plastic. The shaping ring helps to maintain the shape and size of the pipe during the molding process, ensures that the diameter and thickness of the cable protection tube are uniform, prevents deformation, and can enhance the structural rigidity of the pipe. The resin matrix, as a polymer material, can provide strength and toughness to the cable protection tube, so that it can withstand external mechanical pressure and impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a production flow chart of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 The embodiment of the present invention provides a technical solution of a high thermal conductivity cable protection tube and a preparation method thereof:

[0025] Among them, it includes aluminum alloy, copper alloy, composite material and thermal conductive plastic. The proportion of each component of aluminum alloy, copper alloy, composite material and thermal conductive plastic is 60:20:10:10. The aluminum alloy is 6063 aluminum alloy, the copper alloy is C11000 copper, the composite material is metal-based composite material and ceramic filler composite material, the thermal conductive plastic is polyimide, polycarbonate and polyethylene, the metal-based composite material is aluminum-based composite material, the ceramic filler composite material is graphite, the proportion of each component of polyimide, polycarbonate and polyethylene is 40:50:10, the metal material, composite material and thermal conductive plastic are mixed with resin matrix and high thermal conductive filler, and plasticizer and high thermal conductive filler are added. It can improve the thermal conductivity of the material. The mixed raw materials are fed into the extruder, extruded and molded by heating and pressurizing, and the desired tubular shape is formed through the mold. By setting high thermal conductivity fillers, thermal conductive particles, ceramic filler composite materials and plasticizers, graphite can improve thermal conductivity. Plasticizers are glass fiber and carbon fiber. Plasticizers can make the polymer matrix softer and reduce brittleness, thereby improving the impact resistance and fatigue life of glass fiber and carbon fiber composite materials. Plasticizers make the matrix material easier to shape, process and coat, which helps to reduce processing temperature and improve production efficiency. Plasticizers can optimize molecular structure and improve interface adhesion, thereby enhancing the mechanical properties of composite materials.

[0026] Among them, the extruded cable protection tube is cooled and shaped by air cooling equipment. The cooling air is controlled between 20℃-50℃ and the wind speed is 10-20m / s. Thermal conductive coating is applied on the surface of the cable protection tube: the thermal conductive coating is copper, which is applied to the outer surface of the finished tube by spraying, and the coating is heat treated to improve the adhesion and durability of the coating.

[0027] During use, the stress in the material is eliminated to improve the thermal conductivity and ductility of the cable protection tube. The cable protection tube is subjected to thermal conductivity test, mechanical property test and dimensional accuracy inspection. The aluminum-based composite material, shaping ring, resin matrix and polyimide are set. The aluminum-based composite material can enhance the mechanical strength, hardness and wear resistance of aluminum. The composite material can maintain thermal conductivity. Polyimide has high temperature resistance and thermal conductivity, and maintains the formability and processability of plastics. The shaping ring helps to maintain the shape and size of the tube during the molding process, ensures that the diameter and thickness of the cable protection tube are uniform, prevents deformation, and can enhance the structural rigidity of the tube. The resin matrix, as a polymer material, can provide strength and toughness to the cable protection tube, so that it can withstand external mechanical pressure and impact.

[0028] A method for preparing a high thermal conductivity cable protection tube comprises the following steps:

[0029] S1: The selected metal material, composite material and thermal conductive plastic are mixed evenly to ensure the thermal conductivity of the material, a resin matrix, a high thermal conductive filler and a plasticizer are added therein, and the mixed raw materials are fed into an extruder. The extruded high thermal conductive cable protection tube is cooled by an air cooling device and solidified into a shape;

[0030] S2: The cooling air temperature is controlled between 20℃-50℃, and the wind speed is 10-20m / s. The cooled pipe needs to be placed in a shaping ring, and the shaping ring temperature is controlled at 40℃-100℃. The thermal conductive coating is applied to the outer surface of the finished pipe by spraying, and the coating is heat treated to improve the adhesion and durability of the coating;

[0031] S3: Heat the finished tube to 200°C and keep it at this temperature for 30 minutes to avoid deformation caused by thermal stress;

[0032] S4: Use a thermal conductivity tester to measure the thermal conductivity of the cable protection tube, use a tensile testing machine to measure the tensile strength and elongation of the cable protection tube under tension, use an internal diameter gauge to measure the inner diameter of the cable protection tube, and use a laser measuring instrument to achieve non-contact dimensional measurement.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high thermal conductivity cable protection tube, characterized in that: The invention comprises aluminum alloy, copper alloy, composite material and thermal conductive plastic, wherein the proportion of the aluminum alloy, copper alloy, composite material and thermal conductive plastic is 60:20:10:10, the aluminum alloy is 6063 aluminum alloy, the copper alloy is C11000 copper, the composite material is a metal matrix composite material and a ceramic filler composite material, and the thermal conductive plastic is polyimide, polycarbonate and polyethylene.

2. A high thermal conductivity cable protection tube according to claim 1, characterized in that: The metal-based composite material is an aluminum-based composite material, the ceramic filler composite material is graphite, and the proportions of the polyimide, polycarbonate and polyethylene components are 40:50:

10.

3. The high thermal conductivity cable protection tube according to claim 1, characterized in that: The metal material, composite material and thermally conductive plastic are mixed with a resin matrix and a high thermally conductive filler, and a plasticizer is added. The high thermally conductive filler can improve the thermal conductivity of the material. The mixed raw materials are fed into an extruder, and are extruded and molded by heating and pressurizing to form the desired tubular shape through a mold.

4. A high thermal conductivity cable protection tube according to claim 3, characterized in that: The plasticizer is glass fiber and carbon fiber, the high thermal conductivity filler is ceramic particles, the heating temperature is between 200-220° C., and the heating time is 20-60 minutes.

5. A high thermal conductivity cable protection tube according to claim 4, characterized in that: The extruded cable protection tube is cooled and shaped by air cooling equipment. The cooling air is controlled between 20℃-50℃ and the wind speed is 10-20m / s.

6. A high thermal conductivity cable protection tube according to claim 5, characterized in that: Applying thermal conductive coating on the surface of the cable protection tube: the thermal conductive coating is copper, and the thermal conductive coating is applied to the outer surface of the finished tube by spraying, and the coating is heat-treated to improve the adhesion and durability of the coating.

7. A high thermal conductivity cable protection tube according to claim 6, characterized in that: By eliminating the stress in the material, the thermal conductivity and ductility of the cable protection tube are improved, and the cable protection tube is tested for thermal conductivity, mechanical properties and dimensional accuracy.

8. A method for preparing a high thermal conductivity cable protection tube, the method being applicable to the high thermal conductivity cable protection tube described in claims 1 to 7, characterized in that : Includes the following steps: S1: The selected metal material, composite material and thermal conductive plastic are mixed evenly to ensure the thermal conductivity of the material, a resin matrix, a high thermal conductive filler and a plasticizer are added therein, and the mixed raw materials are fed into an extruder. The extruded high thermal conductive cable protection tube is cooled by an air cooling device and solidified into a shape; S2: The cooling air temperature is controlled between 20℃-50℃, and the wind speed is 10-20m / s. The cooled pipe needs to be placed in a shaping ring, and the shaping ring temperature is controlled at 40℃-100℃. The thermal conductive coating is applied to the outer surface of the finished pipe by spraying, and the coating is heat treated to improve the adhesion and durability of the coating; S3: Heat the finished tube to 200°C and keep it at this temperature for 30 minutes to avoid deformation caused by thermal stress; S4: Use a thermal conductivity tester to measure the thermal conductivity of the cable protection tube, use a tensile testing machine to measure the tensile strength and elongation of the cable protection tube under tension, use an internal diameter gauge to measure the inner diameter of the cable protection tube, and use a laser measuring instrument to achieve non-contact dimensional measurement.

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