Power transmission cable

Abstract

The utility model discloses a power transmission cable which comprises a copper conductor, a flame-retardant layer is arranged on the outer side of the copper conductor, a plurality of supporting plates are fixedly connected to the outer side of the flame-retardant layer, a heat-absorbing filling layer is filled between every two adjacent supporting plates, one end of each supporting plate is fixedly connected with an arc-shaped elastic piece, and the other end of each supporting plate is fixedly connected with a cable. A heat insulation layer is fixedly connected to the outer sides of the multiple arc-shaped elastic pieces, a metal shielding layer is fixedly arranged on the outer side of the heat insulation layer, an insulating layer is fixedly arranged on the outer side of the metal shielding layer, and a compression-resistant assembly is fixedly arranged on the outer side of the insulating layer. Therefore, internal stress generated inside is reduced, the phenomenon that the working state and shape of the power transmission cable are changed due to non-uniform expansion of all positions of the heat conduction material is avoided, and the influence on the performance of the power transmission cable is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission cables, and more specifically, to a power transmission cable. Background Art

[0002] Transmission cables are cables used to transmit and distribute electrical energy. With the rapid development of my country's economy, the construction and transformation of the national power grid has been continuously strengthened. High-reliability transmission cables play an important role in the upgrading and transformation of the power grid. During the use of transmission cables, the copper conductor inside them will emit a lot of heat. In order to speed up the heat dissipation and reduce safety hazards, thermal conductive materials are usually filled inside the cables. Although the existing transmission cables are filled with thermal conductive materials during use, the thermal conductive materials are usually tightly filled without reserved expansion space. The filling materials will expand during the heat absorption process due to the principle of thermal expansion and contraction, resulting in higher internal stress inside the cables when thermal expansion and contraction occurs. If the thermal conductive materials expand unevenly at different positions, it is easy to cause changes in the shape of the working state of the transmission cable, resulting in axial tensile stress at different positions of the transmission cable, which will affect the performance of the transmission cable; secondly, the existing transmission cables have poor compressive resistance during use. When subjected to external force, the copper conductor inside the transmission cable is prone to breakage and damage, thereby reducing the service life of the entire transmission cable and the reliability of the quality of the transmission cable. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the problems existing in the prior art, the utility model provides a power transmission cable to solve the technical problem mentioned in the background technology that although the existing power transmission cables are filled with heat-conductive materials during use, the heat-conductive materials are usually tightly filled and no expansion space is reserved.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a power transmission cable, comprising a copper conductor, a flame retardant layer is provided on the outside of the copper conductor, a plurality of support plates are fixedly connected to the outside of the flame retardant layer, a heat absorbing filling layer is filled between two adjacent support plates, an arc-shaped spring sheet is fixedly connected to one end of each support plate, a heat insulation layer is fixedly connected to the outside of the plurality of arc-shaped spring sheets, a metal shielding layer is fixedly provided on the outside of the heat insulation layer, an insulating layer is fixedly provided on the outside of the metal shielding layer, and a pressure-resistant component is fixedly provided on the outside of the insulating layer;

[0007] The pressure-resistant component comprises a pressure-resistant layer fixedly arranged on the outside of the insulating layer, and a plurality of pressure-resistant chambers are arranged in the pressure-resistant layer.

[0008] The utility model is further configured that an arc-shaped inner anti-pressure plate is fixedly provided in the anti-pressure chamber to increase the energy compression capacity of the anti-pressure chamber.

[0009] The utility model is further configured that a reinforcing plate is fixedly provided on the inner anti-compression plate to increase the supporting force between the inner anti-compression plate and the outer anti-compression plate.

[0010] The utility model is further configured that one side of the reinforcing plate is fixedly connected with an arc-shaped external pressure-resistant plate, so as to increase the pressure resistance of the pressure-resistant chamber to the pressure from the outside.

[0011] The utility model is further configured that a protective component is fixedly provided on the outside of the pressure-resistant component, and the protective component includes a corrosion-resistant layer fixedly arranged on the outside of the pressure-resistant layer, thereby increasing the corrosion resistance of the entire transmission cable.

[0012] The utility model is further configured such that a metal mesh layer is fixedly provided on the outer side of the corrosion-resistant layer, so as to increase the mechanical strength of the entire cable and improve the rat-bite resistance.

[0013] The utility model is further configured that a protective layer is fixedly provided on the outer side of the metal mesh layer, a plurality of installation strips are movably provided on the protective layer, and a plurality of installation grooves matching with the installation strips are provided on the protective layer to facilitate the installation of the installation strips.

[0014] The utility model is further configured such that one side of each installation strip is recessed inwardly to form a placement chamber, the placement chamber is fixedly connected to a sealing strip, a plurality of air holes are provided on the sealing strip, and a rodent repellent is placed in the placement chamber to facilitate rodent repellence of the entire power transmission cable.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a transmission cable with the following beneficial effects:

[0017] 1. Through the coordination of copper conductor, flame retardant layer, support plate, heat absorbing filling layer, arc-shaped spring sheet, heat insulation layer, metal shielding layer and insulating layer, when the heat absorbing filling layer absorbs heat and expands, the arc-shaped spring sheet will deform to release space, thereby reducing the internal stress generated inside, avoiding the phenomenon that the shape of the transmission cable working state changes due to uneven expansion of the heat conductive material at different positions, and reducing the impact on the performance of the transmission cable.

[0018] 2. Through the coordination of the pressure-resistant layer, pressure-resistant chamber, inner pressure-resistant plate, reinforcement plate and outer pressure-resistant plate, the pressure resistance of the entire transmission cable can be increased, thereby protecting the transmission cable, avoiding the breakage and damage of the copper conductor, extending the service life of the entire transmission cable, and increasing the reliability of the quality of the transmission cable.

[0019] 3. Through the coordination of the corrosion-resistant layer, metal mesh layer, protective layer, mounting strip, mounting groove, placement room, sealing strip and air vents, the protection of the entire transmission cable can be enhanced, while the anti-rat bite function is increased. The rat repellent is also easy to replace, which improves the work efficiency of replacing the rat repellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of a power transmission cable;

[0021] Figure 2 for Figure 1 A is a partial enlarged schematic diagram;

[0022] Figure 3 for Figure 1 A partial enlarged schematic diagram of B in the middle;

[0023] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the protective layer and its connecting parts when the mounting strip is installed;

[0024] Figure 5 for Figure 4 A partial enlarged schematic diagram of C in the middle.

[0025] In the figure: 1. Copper conductor; 2. Flame retardant layer; 3. Support plate; 4. Heat absorbing filling layer; 5. Arc-shaped spring piece; 6. Heat insulation layer; 7. Metal shielding layer; 8. Insulation layer; 9. Pressure-resistant layer; 10. Pressure-resistant chamber; 11. Inner pressure-resistant plate; 12. Reinforcement plate; 13. Outer pressure-resistant plate; 14. Corrosion-resistant layer; 15. Metal mesh layer; 16. Protective layer; 17. Mounting strip; 18. Mounting groove; 19. Placement chamber; 20. Sealing strip; 21. Air vent. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0029] See also Figure 1-5A power transmission cable comprises a copper conductor 1, a flame retardant layer 2 is arranged on the outer side of the copper conductor 1, a plurality of support plates 3 are fixedly connected to the outer side of the flame retardant layer 2, a heat absorbing filling layer 4 is filled between two adjacent support plates 3, an arc-shaped spring piece 5 is fixedly connected to one end of each support plate 3, a plurality of arc-shaped spring pieces 5 are fixedly connected to the outer side of a heat insulating layer 6, a metal shielding layer 7 is fixedly arranged on the outer side of the heat insulating layer 6, an insulating layer 8 is fixedly arranged on the outer side of the metal shielding layer 7, and a pressure-resistant component is fixedly arranged on the outer side of the insulating layer 8;

[0030] The pressure-resistant component includes a pressure-resistant layer 9 fixedly arranged on the outside of the insulating layer 8 , and a plurality of pressure-resistant chambers 10 are arranged in the pressure-resistant layer 9 .

[0031] In this embodiment, during the use of the entire transmission cable, the copper conductor 1 will generate a large amount of heat. A flame retardant layer 2 is provided on the outside of the copper conductor 1. The flame retardant layer 2 is made of a flame retardant polyurethane thermoplastic elastomer material, which can improve the flame retardancy of the entire transmission cable. A plurality of support plates 3 form a supporting skeleton outside the copper conductor 1. The heat-absorbing filling layer 4 filled between the support plates 3 is made of a thermally conductive silicone rubber material, which has good heat absorption performance and will expand during the heat absorption process. After the heat-absorbing filling layer 4 expands, it pushes the arc-shaped spring piece 5, and the arc-shaped spring piece 5 is deformed to release space for the heat-absorbing filling layer 4. At the same time, the arc-shaped spring piece 5 supports the support plate 3 and the thermal insulation layer 6. The thermal insulation layer 6 is made of polytetrafluoroethylene, commonly known as Teflon, which has excellent high temperature resistance and excellent chemical stability, as well as good flame retardancy.

[0032] More specifically, when the entire transmission cable is in use, the copper conductor 1 generates a large amount of heat, the heat-absorbing filling layer 4 expands after absorbing heat, and the arc-shaped spring sheet 5 deforms to release space for the heat-absorbing filling layer 4. The entire transmission cable is provided with a pressure-resistant layer 9 and a pressure-resistant chamber 10, and the pressure-resistant chamber 10 is preferably an airbag structure. When the outside world applies pressure to the transmission cable, the pressure-resistant chamber 10 can improve the pressure resistance of the entire transmission cable.

[0033] See also Figure 1-5 As an implementation method for enhancing the pressure resistance of the anti-pressure chamber 10: an arc-shaped inner anti-pressure plate 11 is fixedly provided in the anti-pressure chamber 10, a reinforcing plate 12 is fixedly provided on the inner anti-pressure plate 11, and an arc-shaped outer anti-pressure plate 13 is fixedly connected to one side of the reinforcing plate 12.

[0034] Specifically, when the outside world applies pressure to the transmission cable, the outer pressure-resistant plate 13 and the inner pressure-resistant plate 11 support the pressure-resistant chamber 10, while the reinforcing plate 12 supports between the outer pressure-resistant plate 13 and the inner pressure-resistant plate 11, thereby increasing the pressure resistance of the entire transmission line.

[0035] See also Figure 1-5As an implementation method for improving the protection of power transmission cables: a protective component is fixedly provided on the outside of the pressure-resistant component, and the protective component includes a corrosion-resistant layer 14 fixedly arranged on the outside of the pressure-resistant layer 9, a metal mesh layer 15 is fixedly provided on the outside of the corrosion-resistant layer 14, and a protective layer 16 is fixedly provided on the outside of the metal mesh layer 15. A plurality of mounting strips 17 are movably provided on the protective layer 16, and a plurality of mounting grooves 18 matching the mounting strips 17 are provided on the protective layer 16. One side of each mounting strip 17 is recessed inward to form a placement chamber 19, and a sealing strip 20 is fixedly connected to the placement chamber 19, and a plurality of air holes 21 are provided on the sealing strip 20.

[0036] Specifically, the material of the corrosion-resistant layer 14 is polyethylene, which is a commonly used corrosion-resistant material with good chemical stability, weather resistance and corrosion resistance. It is suitable for a variety of environments and increases the corrosion resistance of the entire transmission cable. The metal mesh layer 15 can enhance the mechanical strength of the cable, improve the tensile and extrusion resistance of the cable, and effectively shield the electromagnetic field to reduce the impact of electromagnetic interference generated by the cable on external sensitive equipment. A rat repellent is placed in the placement chamber 19. The smell of the rat repellent can diffuse from the air vents 21 to the surrounding air, thereby repelling rats and reducing the phenomenon of the cable being bitten by rats. When the rat repellent fails, the installation strip 17 can be pulled to remove the installation strip 17 from the installation slot 18, so that the rat repellent can be quickly replaced. The sealing strip 20 is bonded to the installation strip 17. The removed installation strip 17 can tear off the sealing strip 20 to replace the rat repellent, and then the sealing strip 20 is re-bonded to the installation strip 17, so that the installation strip 17 can be reused.

[0037] In summary, when the overall equipment is in use:

[0038] When the entire transmission cable is in use, the copper conductor 1 will generate a large amount of heat. A flame retardant layer 2 is provided on the outside of the copper conductor 1. The flame retardant layer 2 is made of a flame retardant polyurethane thermoplastic elastomer material, which can improve the flame retardancy of the entire transmission cable. A plurality of support plates 3 form a support skeleton outside the copper conductor 1. The heat-absorbing filling layer 4 filled between the support plates 3 is made of a thermally conductive silicone rubber material, which has good heat absorption performance and expands during the heat absorption process. After the heat-absorbing filling layer 4 expands, it pushes the arc-shaped spring piece 5, and the arc-shaped spring piece 5 is deformed to release space for the heat-absorbing filling layer 4. At the same time, the arc-shaped spring piece 5 supports the support plate 3 and the thermal insulation layer 6. The thermal insulation layer 6 is made of polytetrafluoroethylene, commonly known as Teflon, which has excellent high temperature resistance and excellent chemical stability, as well as good flame retardancy.

[0039] When the transmission cable is subjected to external pressure, the entire transmission cable is provided with a pressure-resistant layer 9 and a pressure-resistant chamber 10. The pressure-resistant chamber 10 is preferably an airbag structure. When the outside world applies pressure to the transmission cable, the pressure-resistant chamber 10 can improve the pressure resistance of the entire transmission cable. When the outside world applies pressure to the transmission cable, the outer pressure-resistant plate 13 and the inner pressure-resistant plate 11 support the pressure-resistant chamber 10, while the reinforcing plate 12 supports between the outer pressure-resistant plate 13 and the inner pressure-resistant plate 11, thereby increasing the pressure resistance of the entire transmission line.

[0040] When the power transmission cable is in the state of preventing rats from biting, the material of the corrosion-resistant layer 14 is polyethylene, which is a commonly used corrosion-resistant material with good chemical stability, weather resistance and corrosion resistance, suitable for a variety of environments, and increases the corrosion resistance of the entire power transmission cable. The metal mesh layer 15 can enhance the mechanical strength of the cable, improve the tensile and extrusion resistance of the cable, and effectively shield the electromagnetic field, reducing the impact of electromagnetic interference generated by the cable on external sensitive equipment. Rat repellent is placed in the placement chamber 19, and the smell of the rat repellent can diffuse from the air vent 21 to the surrounding air, thereby driving away rats and reducing the phenomenon of the cable being bitten by rats. When the rat repellent fails, the installation strip 17 can be pulled to remove the installation strip 17 from the installation groove 18, so that the rat repellent can be quickly replaced. The sealing strip 20 is bonded to the installation strip 17. The disassembled installation strip 17 can tear off the sealing strip 20 to replace the rat repellent, and then the sealing strip 20 is re-bonded to the installation strip 17, so that the installation strip 17 can be reused. The length of the mounting groove 18 is longer than the mounting strip 17. The mounting strip 17 and the sealing strip 20 are made of rubber. Meanwhile, there is a large space at both ends of the mounting groove 18, so it is convenient to install the mounting strip.

[0041] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A power transmission cable comprising a copper conductor (1), characterized in that: A flame retardant layer (2) is provided on the outside of the copper conductor (1), a plurality of support plates (3) are fixedly connected to the outside of the flame retardant layer (2), a heat absorbing filling layer (4) is filled between two adjacent support plates (3), one end of each support plate (3) is fixedly connected to an arc-shaped spring sheet (5), a plurality of arc-shaped spring sheets (5) are fixedly connected to the outside of a heat insulating layer (6), a metal shielding layer (7) is fixedly provided on the outside of the heat insulating layer (6), an insulating layer (8) is fixedly provided on the outside of the metal shielding layer (7), and a pressure-resistant component is fixedly provided on the outside of the insulating layer (8); The pressure-resistant component comprises a pressure-resistant layer (9) fixedly arranged on the outside of the insulating layer (8), and a plurality of pressure-resistant chambers (10) are arranged in the pressure-resistant layer (9).

2. A power transmission cable according to claim 1, characterized in that: An arc-shaped inner anti-pressure plate (11) is fixedly provided in the anti-pressure chamber (10).

3. A power transmission cable according to claim 2, characterized in that: A reinforcing plate (12) is fixedly provided on the inner pressure-resistant plate (11).

4. A power transmission cable according to claim 3, characterized in that: An arc-shaped external pressure-resistant plate (13) is fixedly connected to one side of the reinforcing plate (12).

5. A power transmission cable according to any one of claims 1 or 2, characterized in that: A protective component is fixedly arranged outside the pressure-resistant component, and the protective component comprises a corrosion-resistant layer (14) fixedly arranged outside the pressure-resistant layer (9).

6. A power transmission cable according to claim 5, characterized in that: A metal mesh layer (15) is fixedly provided on the outer side of the corrosion-resistant layer (14).

7. A power transmission cable according to claim 6, characterized in that: A protective layer (16) is fixedly provided on the outer side of the metal mesh layer (15), a plurality of mounting strips (17) are movably provided on the protective layer (16), and a plurality of mounting grooves (18) matching with the mounting strips (17) are provided on the protective layer (16).

8. A power transmission cable according to claim 7, characterized in that: One side of each installation strip (17) is inwardly recessed to form a placement chamber (19), and the placement chamber (19) is fixedly connected to a sealing strip (20), and the sealing strip (20) is provided with a plurality of air holes (21).

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