Low-carbon energy-saving power cable

Abstract

The invention discloses a low-carbon energy-saving power cable, which comprises a steel wire framework, tensile wire harnesses, insulating wire cores, separation inner arc strips, a protection inner sheath layer, a heat conduction rubber and plastic sheath layer, a heat conduction ointment layer, a metal armor layer, a flame-retardant sheath layer, a buffer outer sheath layer and elliptical arc grooves, and can effectively improve the bending performance and impact resistance of the cable. The tensile property of the cable is effectively improved, the cable structure is not easy to deform and damage, and the current-carrying performance of the cable can be prevented from being influenced by too high temperature.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to the technical field of low-carbon energy-saving power cables. Background Art

[0002] Power cables are cables used to transmit and distribute electrical energy. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electrical energy in the trunk lines of power systems. They are widely used in power transmission in various fields, and their usage is gradually increasing. During the use of power cables, some parts of the cables will bend due to the use angle problem, and the external compression will cause the internal structure of the cable to deform and be damaged, affecting its normal use. Power cables will heat up under load current. When multiple conductors are entangled together, heat is easily accumulated and the heat dissipation effect is poor, which will limit the current carrying capacity of the cable. The continuously generated heat is prone to fire due to high temperature, causing cable damage. Therefore, it is necessary to design a low-carbon and energy-saving power cable. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to propose a low-carbon and energy-saving power cable, which can effectively improve the bending performance and impact resistance of the cable, effectively improve the tensile strength of the cable, and the cable structure is not easily deformed and damaged, and can avoid the impact of excessive temperature on the current-carrying performance of the cable.

[0004] To achieve the above-mentioned purpose, the present invention proposes a low-carbon energy-saving power cable, comprising a steel wire skeleton, a tensile harness, an insulating core, a separating inner arc strip, a protective inner sheath layer, a heat-conducting rubber-plastic sheath layer, a heat-conducting grease layer, a metal armor layer, a flame-retardant sheath layer, a buffer outer sheath layer and an elliptical arc groove, wherein a tensile harness is axially interspersed inside the steel wire skeleton, a plurality of insulating cores are uniformly arranged around the outer side of the steel wire skeleton, separating inner arc strips are sandwiched between adjacent insulating cores, and the separating inner arc strips are arranged on the protective inner sheath layer. The inner side of the protective inner sheath layer is covered with the outer side of the insulating core, the outer side of the protective inner sheath layer is provided with a thermally conductive rubber-plastic sheath layer, a thermally conductive grease layer is evenly filled between the protective inner sheath layer and the thermally conductive rubber-plastic sheath layer, the outer side of the thermally conductive rubber-plastic sheath layer is provided with a metal armor layer, the outer side of the metal armor layer is provided with a flame-retardant sheath layer, the outer side of the flame-retardant sheath layer is provided with a buffer outer sheath layer, and a plurality of elliptical arc grooves are evenly surrounded inside the buffer outer sheath layer.

[0005] Preferably, the tensile harness is a multi-strand twisted nylon harness, and the tensile harness is in uniform contact with the inner side surface of the steel wire skeleton.

[0006] Preferably, the insulating wire core is an oxygen-free copper wire core covered with a thermally conductive insulating layer, and the outer side surface of the insulating wire core does not contact the protective inner sheath layer.

[0007] Preferably, an arc-shaped through groove is provided inside the inner arc separation strip along the axis line, the inner arc separation strip and the protective inner sheath layer are an integrated structure, and the protective inner sheath layer is a heat-conducting insulating sheath.

[0008] Preferably, the metal armor layer is an aluminum-magnesium alloy belt armor layer.

[0009] Preferably, a fireproof mastic layer is evenly filled between the flame-retardant sheath layer and the buffer outer sheath layer.

[0010] Preferably, tensile secondary wires are inserted inside the elliptical arc groove, and the tensile secondary wires are aramid fiber bundles.

[0011] Preferably, the buffer outer sheath layer is a high-density polyethylene outer sheath layer.

[0012] Preferably, the flame retardant sheath layer is a low-smoke halogen-free polyolefin sheath layer.

[0013] Beneficial effects of the present invention: The present invention combines a steel wire skeleton, a tensile harness, an insulating wire core, a separating inner arc strip, a protective inner sheath layer, a heat-conducting rubber-plastic sheath layer, a heat-conducting grease layer, a metal armor layer, a flame-retardant sheath layer, a buffer outer sheath layer and an elliptical arc groove together. After experimental optimization, the insulating wire core is separated and flexibly buffered by the separating inner arc strip on the inner side of the steel wire skeleton and the protective inner sheath layer. The formed buffer structure has good bending performance and impact resistance. The tensile harness effectively improves the tensile resistance of the cable. The structure inside the cable is not easily deformed and damaged. The heat-conducting grease layer is combined with the conductive The thermal rubber-plastic sheath layer quickly transfers the heat generated by the insulating core to the metal armor layer for heat dissipation and cooling, avoiding excessive temperature affecting the current-carrying performance of the cable. The metal armor layer achieves shielding protection and improves transmission stability. The flame-retardant sheath layer and the fire-retardant putty layer form a soft fire-retardant structure, which can maintain good bending and impact resistance during cable bending and extrusion. The buffer outer sheath and the elliptical arc groove can form multiple evenly distributed buffer structures from the outside of the cable, further improving the bending and impact resistance of the cable. The tensile auxiliary line can strengthen the overall tensile resistance of the cable from the outside.

[0014] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the low-carbon energy-saving power cable of the present invention.

[0016] In the figure: 1- steel wire skeleton, 2- tensile wire harness, 3- insulated wire core, 4- separating inner arc strip, 5- protective inner sheath layer, 6- thermal conductive rubber-plastic sheath layer, 7- thermal conductive grease layer, 8- metal armor layer, 10- flame retardant sheath layer, 11- buffer outer sheath layer, 12- elliptical arc groove, 13- fireproof putty layer, 14- tensile auxiliary line. DETAILED DESCRIPTION

[0017] See also Figure 1 The low-carbon energy-saving power cable of the present invention comprises a steel wire skeleton 1, a tensile harness 2, an insulating core 3, a separating inner arc strip 4, a protective inner sheath layer 5, a heat-conducting rubber-plastic sheath layer 6, a heat-conducting grease layer 7, a metal armor layer 8, a hot-melt adhesive coating 9, a flame-retardant sheath layer 10, a buffer outer sheath layer 11 and an elliptical arc groove 12. The steel wire skeleton 1 is axially interspersed with a tensile harness 2, and a plurality of insulating cores 3 are uniformly arranged around the outer side of the steel wire skeleton 1, and adjacent insulating cores 3 are sandwiched between them. A separation inner arc strip 4 is provided, wherein the separation inner arc strip 4 is provided on the inner side of the protective inner sheath layer 5, wherein the protective inner sheath layer 5 is provided on the outer side of the insulating core 3, wherein the outer side of the protective inner sheath layer 5 is provided with a heat-conducting rubber-plastic sheath layer 6, wherein a heat-conducting grease layer 7 is evenly filled between the protective inner sheath layer 5 and the heat-conducting rubber-plastic sheath layer 6, wherein the outer side of the heat-conducting rubber-plastic sheath layer 6 is provided with a metal armor layer 8, wherein the outer side of the metal armor layer 8 is provided with a flame-retardant sheath layer 10, wherein the flame-retardant sheath layer 10 The outer side of the buffer outer sheath layer 11 is uniformly surrounded by a plurality of elliptical arc grooves 12. The tensile wire harness 2 is a multi-strand twisted nylon wire harness. The tensile wire harness 2 is in uniform contact with the inner side of the steel wire skeleton 1. The insulating wire core 3 is an oxygen-free copper wire core wrapped with a thermal conductive insulating layer. The outer side of the insulating wire core 3 does not contact the protective inner sheath layer 5. The inner side of the separating inner arc strip 4 is penetrated by an arc groove along the axis. The separating inner arc strip 4 and the protective inner sheath layer 5 are arranged on the inner side of the separating inner arc strip 4. The protective inner sheath layer 5 is an integrated structure, the protective inner sheath layer 5 is a heat-conducting insulating sheath, the metal armor layer 8 is an aluminum-magnesium alloy belt armor layer, a fire-retardant putty layer 13 is evenly filled between the flame-retardant sheath layer 10 and the buffer outer sheath layer 11, a tensile secondary line 14 is interspersed inside the elliptical arc groove 12, and the tensile secondary line 14 is an aramid fiber bundle, the buffer outer sheath layer 11 is a high-density polyethylene outer sheath layer, and the flame-retardant sheath layer 10 is a low-smoke halogen-free polyolefin sheath layer.

[0018] The present invention combines a steel wire skeleton 1, a tensile harness 2, an insulating core 3, a separating inner arc strip 4, a protective inner sheath layer 5, a heat-conducting rubber-plastic sheath layer 6, a heat-conducting grease layer 7, a metal armor layer 8, a flame-retardant sheath layer 10, a buffer outer sheath layer 11 and an elliptical arc groove 12 together. After experimental optimization, the insulating core 3 is separated and flexibly buffered by the separating inner arc strip 4 on the inner side of the steel wire skeleton 1 and the protective inner sheath layer 5. The formed buffer structure has good bending performance and impact resistance. The tensile harness 2 effectively improves the tensile resistance of the cable. The structure inside the cable is not easily deformed and damaged. The heat-conducting grease layer 7 cooperates with the heat-conducting The rubber-plastic sheath layer 6 quickly transfers the heat generated by the insulating core 3 to the metal armor layer 8 for heat dissipation and cooling, thereby preventing excessive temperature from affecting the current-carrying performance of the cable. The metal armor layer 8 achieves the effect of shielding protection and improving transmission stability. The flame-retardant sheath layer 10 cooperates with the fire-retardant putty layer 13 to form a soft fire-retardant structure, which can maintain good bending performance and impact resistance during cable bending and extrusion. The buffer outer sheath cooperates with the elliptical arc groove 12 to form multiple evenly distributed buffer structures from the outside of the cable, further improving the bending performance and impact resistance of the cable. The tensile secondary line 14 can strengthen the overall tensile resistance of the cable from the outside.

[0019] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. Low-carbon energy-saving power cable, characterized by: The invention comprises a steel wire skeleton (1), a tensile wire bundle (2), an insulating wire core (3), a separating inner arc strip (4), a protective inner sheath layer (5), a heat-conducting rubber-plastic sheath layer (6), a heat-conducting grease layer (7), a metal armor layer (8), a flame-retardant sheath layer (10), a buffer outer sheath layer (11) and an elliptical arc groove (12), wherein the steel wire skeleton (1) is axially interspersed with the tensile wire bundle (2), a plurality of insulating wire cores (3) are evenly arranged around the outer side of the steel wire skeleton (1), separating inner arc strips (4) are sandwiched between adjacent insulating wire cores (3), and the separating inner arc strips (4) are arranged on the inner side of the protective inner sheath layer (5). The protective inner sheath layer (5) is coated on the outside of the insulating wire core (3), the outer side of the protective inner sheath layer (5) is provided with a heat-conducting rubber-plastic sheath layer (6), a heat-conducting grease layer (7) is evenly filled between the protective inner sheath layer (5) and the heat-conducting rubber-plastic sheath layer (6), the outer side of the heat-conducting rubber-plastic sheath layer (6) is provided with a metal armor layer (8), the outer side of the metal armor layer (8) is provided with a flame-retardant sheath layer (10), the outer side of the flame-retardant sheath layer (10) is provided with a buffer outer sheath layer (11), and the buffer outer sheath layer (11) is evenly surrounded by a plurality of elliptical arc grooves (12).

2. The low-carbon energy-saving power cable according to claim 1, characterized in that: The tensile wire harness (2) is a multi-strand twisted nylon wire harness, and the tensile wire harness (2) is in uniform contact with the inner side surface of the steel wire skeleton (1).

3. The low-carbon energy-saving power cable according to claim 1, characterized in that: The insulating wire core (3) is an oxygen-free copper wire core covered with a heat-conducting insulating layer, and the outer side surface of the insulating wire core (3) does not contact the protective inner sheath layer (5).

4. The low-carbon energy-saving power cable according to claim 1, characterized in that: An arc-shaped through groove is provided inside the separating inner arc strip (4) along the axis, the separating inner arc strip (4) and the protective inner sheath layer (5) are an integrated structure, and the protective inner sheath layer (5) is a heat-conducting insulating sheath.

5. The low-carbon energy-saving power cable according to claim 1, characterized in that: The metal armor layer (8) is an aluminum-magnesium alloy belt armor layer.

6. The low-carbon energy-saving power cable according to claim 1, characterized in that: A fireproof mastic layer (13) is evenly filled between the flame-retardant jacket layer (10) and the buffer outer jacket layer (11).

7. The low-carbon energy-saving power cable according to claim 1, characterized in that: A tensile secondary wire (14) is inserted into the elliptical arc groove (12), and the tensile secondary wire (14) is an aramid fiber bundle.

8. The low-carbon energy-saving power cable according to claim 1, characterized in that: The buffer outer sheath layer (11) is a high-density polyethylene outer sheath layer.

9. The low-carbon energy-saving power cable according to claim 1, characterized in that: The flame retardant sheath layer (10) is a low-smoke halogen-free polyolefin sheath layer.

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