Power cable for power construction

Abstract

The invention discloses a power cable for power construction, which relates to the technical field of power cables, and comprises a plurality of groups of cable cores and a steel wire reinforcing core arranged at the center of the plurality of groups of cable cores, and further comprises a filling layer, an inner protective layer, an armor layer, a fireproof layer and an outer protective layer which are sequentially arranged from inside to outside from the center of the steel wire reinforcing core, the filling layer is provided with a heat induction mechanism which prevents heat from being concentrated at the intersection of the multiple groups of cable cores and adaptively adjusts the heat dissipation capability according to the operating temperature of the cable cores, the heat induction mechanism comprises a hot melting layer and a deformation layer which are arranged between the filling layer and the inner protection layer, and the hot melting layer is made of a phase-change material added with high-thermal-conductivity filler; according to the invention, by arranging the heat response mechanism, the heat dissipation capability can be adaptively adjusted according to the operation temperature of the cable core, so that the cable can automatically adjust the heat dissipation structure and performance according to the temperature change under different working conditions, the intelligent level and the operation flexibility of the cable are improved, and the cable can better adapt to the complex and changeable power operation environment.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, in particular to a power cable for electric power construction. Background Art

[0002] As an indispensable energy source for modern industry, commerce and residents' lives, the reliability and safety of electricity transmission and distribution are directly related to the stable operation of society. As a key component of the power transmission system, power cables are responsible for efficiently and stably transmitting electricity from power plants to various power terminals.

[0003] Chinese patent (Announcement No.: CN117457271A), this solution specifically includes: an insulated wire core composed of a conductor and an insulating layer extruded outside the conductor, a tape layer wrapped around the outside of the insulating wire core, an inorganic glass fiber filler filled between the insulating wire core and the tape layer, and an inner lining layer and an armor layer extruded on the outside of the tape layer in sequence, a shielding layer wound between the inner lining layer and the armor layer and outside the inner lining layer, and a fire-resistant insulating layer and an outer sheath extruded on the outside of the armor layer in sequence. The present invention wraps the shielding layer and the fire-resistant insulating layer, which has the advantages of high temperature resistance, low temperature resistance, aging resistance, and better insulation performance, and is suitable for special places with a large number of people. In addition, the armor layer prevents external mechanical damage, cooperates with the outer sheath, improves the service life and pressure resistance of the cable, does not delay combustion and does not support combustion, protects the wire core, prevents the wire core from being squeezed and damaged by each other, has high stability, and also prevents the cable from cracking.

[0004] The Chinese patent (publication number: CN116110650A) specifically includes a conductor assembly, a shielding layer, and an armor layer, which are sequentially coated. The armor layer is a carbon fiber graphene composite armor layer. The power cable provided by this invention addresses the issues of vertically installed power cables being susceptible to damage due to weight-induced pulling, and the issue of the cable emitting large amounts of electromagnetic waves during power-on, which can interfere with the normal operation of oil and gas collection equipment.

[0005] When traditional cables are operating under high load, the heat generated by the cores tends to concentrate in the center area. This is especially true in power cables containing multiple cores. Heat concentration is prone to occur at the intersection of the cores. This heat concentration not only accelerates the aging of the insulation material and reduces the service life of the cable, but can also cause safety accidents such as cable short circuits and fires, thereby threatening the stable operation of the power system. Secondly, the heat dissipation performance of existing cables is limited, and it is difficult to effectively regulate heat according to the real-time changes in the core temperature. Under complex and changeable power operating conditions, this fixed heat dissipation mode is difficult to meet the heat dissipation needs in different scenarios. In addition, during the heat dissipation process, the heat dissipation structure of traditional cables is relatively fixed, and it is difficult to dynamically adjust the heat dissipation path and heat dissipation efficiency according to the heat dissipation needs, resulting in poor heat dissipation effect, which may affect the reliability and efficiency of power transmission. Therefore, a power cable for power construction is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a power cable for power construction, which has the advantage of enabling the cable to better adapt to the complex and changeable power operation environment, and solves the problem of difficulty in dynamically adjusting the heat dissipation path and heat dissipation efficiency according to heat dissipation requirements.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a power cable for electric power construction, comprising a plurality of cable cores and a steel wire reinforcement core arranged at the center of the plurality of cable cores, and further comprising a filling layer, an inner sheath, an armor layer, a fireproof layer, and an outer sheath arranged in sequence from the inside to the outside of the center of the steel wire reinforcement core, wherein the filling layer is provided with a heat-resisting mechanism for preventing heat from concentrating at the intersection of the plurality of cable cores and for adaptively adjusting the heat dissipation capacity according to the operating temperature of the cable cores; The heat-resisting mechanism includes a heat-melting layer and a heat-resisting layer provided between the filling layer and the inner protective layer. The heat-melting layer is located on a side close to the filling layer and is a phase change material added with a high thermal conductivity filler. The filling layer is respectively embedded with a group of axial capsules corresponding to the positions of the multiple groups of cable cores, the axial capsules are filled with gas, and the axial capsules are fixedly connected with an adsorbent for adsorbing the gas therein to change the amount of free gas in the axial capsules; The filling layer is provided with a mountain-shaped elastic frame embedded and fixed in the positions of multiple groups of axial capsules, and an elastic axial sealing plate is provided on the side of the mountain-shaped elastic frame facing the hot melt layer. An axial groove is provided at the position of the mountain-shaped elastic frame corresponding to the filling layer, and an axial cavity for sliding connection of the elastic axial sealing plate is provided on the mountain-shaped elastic frame.

[0008] Preferably, the heat-melting layer comprises the following raw materials in the following mass ratios: 5.5 to 17.5 parts of resin matrix, 57.5 to 70.7 parts of high thermal conductive filler and 0.3 to 1.5 parts of coupling agent; The high thermal conductivity filler is expanded graphite and carbon fiber.

[0009] Preferably, the gas filled in the axial capsule is nitrogen, and the adsorbent is a zeolite molecular sieve for adsorbing nitrogen.

[0010] Preferably, the mountain-shaped elastic frame has multiple groups of return air channels on one end facing the axis bag, and the return air channels are in gas communication with the axis bag; The partially melted heat-melting layer enters the axial groove to reduce the thickness of the structure itself.

[0011] Preferably, the stress forming layer is located between the hot melt layer and the inner protective layer, and the stress forming layer is a high elastic polymer material with high thermal conductivity filler added, and includes the following raw materials in the following mass ratio: 5.5 to 17.5 parts by weight of polymer matrix, 57.5 to 70.7 parts by weight of high thermal conductivity filler, 0.3 to 1.5 parts by weight of coupling agent and phase change material.

[0012] Preferably, the armor layer is woven from stainless steel wires, the diameter of the stainless steel wires is between 0.2 and 0.8 mm, and the weaving density is not less than 80%.

[0013] Preferably, the fireproof layer includes the following raw materials in the following mass ratio: 30-40 parts of calcium carbonate, 8-12 parts of magnesium chloride, 15-25 parts of modified magnesium hydroxide, 15-20 parts of artificial mica, 10-15 parts of clay, 10-15 parts of aluminum silicate, 10-15 parts of antimony oxide, 5-10 parts of chlorinated paraffin, 10-15 parts of sodium silicate and 8-12 parts of adhesive.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, by providing a heat-responsive mechanism, can adaptively adjust the heat dissipation capacity according to the operating temperature of the cable core. When the cable core temperature drops, the adsorbent releases previously adsorbed gas through desorption, causing the amount of free gas in the axial capsule to return to normal, pushing the elastic axial sealing plate back to its initial position. At the same time, the hot melt layer condenses again and returns to its initial thickness, preparing for subsequent melting heat absorption and thickness changes. Furthermore, through the adaptive and dynamic adjustment mechanism, the cable can automatically adjust its heat dissipation structure and performance according to temperature changes under different operating conditions without manual intervention, thereby improving the cable's intelligence level and operational flexibility, enabling it to better adapt to the complex and changing power operating environment.

[0015] 2. By providing an armor layer, the present invention can effectively resist external mechanical impact and chemical corrosion, enhance the mechanical strength and tensile performance of the power cable, improve the wear resistance and crack resistance of the cable, and enable it to withstand greater external forces without being easily damaged. At the same time, the armor layer can also play a certain shielding role, reduce electromagnetic interference, and ensure the quality of power transmission.

[0016] 3. The present invention provides additional fire protection for the power cable in high temperature environments such as fire by setting a fireproof layer, thereby preventing the fire from spreading through the power cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the components where the armor layer of the present invention is located; Figure 3 This is a schematic diagram of the components where the shape layer of the present invention is located; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the internal cross-section of the inner protective layer of the present invention; Figure 7 This is a schematic diagram of the components where the filling layer of the present invention is located; Figure 8 This is a schematic diagram of the axial capsule structure of the present invention.

[0018] In the figure: 1. Cable core; 2. Filling layer; 3. Hot melt layer; 4. Axial capsule; 5. Steel wire reinforcement core; 6. Adsorbent; 7. Mountain-shaped elastic frame; 8. Elastic axial sealing plate; 9. Return air channel; 10. Stress layer; 11. Inner protective layer; 12. Armor layer; 13. Fireproof layer; 14. Outer protective layer; 15. Axial cavity. DETAILED DESCRIPTION

[0019] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] See also Figures 1 to 8 The present invention provides a technical solution: a power cable for electric power construction, comprising a plurality of cable cores 1 and a steel wire reinforcement core 5 arranged at the center of the plurality of cable cores 1, and further comprising a filling layer 2, an inner sheath 11, an armor layer 12, a fireproof layer 13 and an outer sheath 14 arranged in sequence from the inside to the outside of the center of the steel wire reinforcement core 5. The filling layer 2 is provided with a heat-resisting mechanism for preventing heat from concentrating at the intersection of the plurality of cable cores 1 and adaptively adjusting the heat dissipation capacity according to the operating temperature of the cable cores 1; The heat-resisting mechanism includes a heat-melting layer 3 and a heat-resisting layer 10 provided between the filling layer 2 and the inner protective layer 11. The heat-melting layer 3 is located on the side close to the filling layer 2 and is a phase change material with a high thermal conductivity filler added thereto. The filling layer 2 is fixed with a group of axial capsules 4 respectively corresponding to the positions of the multiple groups of cable cores 1. The axial capsules 4 are filled with gas. The axial capsules 4 are fixedly connected with an adsorbent 6 for adsorbing the gas therein to change the amount of free gas in the axial capsules 4. The filling layer 2 is fixed with a mountain-shaped elastic frame 7 at the positions corresponding to the multiple groups of axial capsules 4. The mountain-shaped elastic frame 7 is provided with an elastic axial sealing plate 8 on the side facing the hot melt layer 3. The filling layer 2 is provided with an axial groove at the position corresponding to the mountain-shaped elastic frame 7. The mountain-shaped elastic frame 7 is provided with an axial cavity 15 for sliding connection of the elastic axial sealing plate 8. The partially melted hot melt layer 3 enters the axial groove to reduce the thickness of its own structure.

[0021] The mountain-shaped elastic frame 7 has a plurality of groups of return air channels 9 on one end thereof facing the axis bag 4 , and the return air channels 9 are in gas communication with the axis bag 4 .

[0022] like Figures 1-8 As shown, multiple groups of axial capsules 4 are provided on the outer peripheral surface of the steel wire reinforcement core 5 and at positions corresponding to the cable core 1, wherein the number of axial capsules 4 is consistent with the number of cable cores 1, and the cable core 1 is embedded and fixed in the filling layer 2 and one side surface is in contact with the cable core 1. When the cable core 1 generates heat during operation, the heat will be transferred to the gas inside the axial capsule 4 and simultaneously transferred outward through the filling layer 2.

[0023] At the same time, in the initial state, the heat-melting layer 3 is in a condensed state. When the cable core 1 is running and generates a large amount of heat, the heat-melting layer 3 will gradually melt under the influence of this temperature, and the heat-melting layer 3 will absorb part of the heat during the melting process, thereby achieving the purpose of quickly cooling the filling layer 2 and the cable core 1 at the corresponding position, thereby effectively reducing the temperature of the cable core 1 and improving the heat dissipation efficiency.

[0024] At the same time, when the temperature of the axial capsule 4 rises due to the operation of the cable core 1, since the axial capsule 4 is provided with an adsorbent 6 for adsorbing the gas therein, when the temperature rises, the movement of the gas molecules in the axial capsule 4 intensifies, and some gas molecules are adsorbed by the micropores or active sites on the surface of the adsorbent 6, thereby improving the adsorption capacity of the gas molecules in the axial capsule 4. Among them, since the axial capsule 4 is in gas communication with the axial cavity 15 opened on the mountain-shaped elastic frame 7 through the return air channel 9, and the elastic axial sealing plate 8 is slidably connected to the mountain-shaped elastic frame 7 through the axial cavity 15, in the initial state, the elastic axial sealing plate 8 is in conflict with the hot melt layer 3, and when the adsorption capacity of the adsorbent 6 for the gas in the axial capsule 4 becomes stronger, the amount of gas in the axial capsule 4 decreases, and at this time, the amount of gas in the axial cavity 15 can, under the action of low pressure, prompt the elastic axial sealing plate 8 to move a certain distance into the mountain-shaped elastic frame 7, thereby prompting the existence of redundant space in the axial groove for the melted hot melt layer 3 to enter.

[0025] At the same time, when the heat-melting layer 3 is in a molten state due to the increase in temperature, under the extrusion of the stress layer 10 material, the melted heat-melting layer 3 will enter the redundant space in the axial groove, thereby causing the thickness of the heat-melting layer 3 corresponding to the cable core 1 to become smaller, thereby driving the heat conduction distance from the cable core 1 to the outer sheath 14 to be shortened. According to the basic principle of heat conduction, the speed of heat conduction is inversely proportional to the conduction distance. Therefore, in unit time, more heat can be quickly conducted from the cable core 1 to the outer sheath 14 and the external heat dissipation environment, thereby accelerating the cooling speed of the cable core 1. In addition, the heat-melting layer 3 will absorb part of the heat during the melting process, and thus for power cables operating under high load, the temperature of the cable core 1 can be timely and effectively reduced, avoiding performance degradation and safety hazards caused by long-term high-temperature operation.

[0026] It should be noted that when the temperature of the cable core 1 decreases, under the desorption phenomenon, the adsorbent 6 can release the previously adsorbed gas, thereby prompting the amount of free gas in the axial bag 4 to return to normal. Under the push of the gas, the elastic axial sealing plate 8 can be prompted to return to its initial position, that is, the molten hot melt layer 3 in the axial groove is driven into the junction position of the filling layer 2 and the stress layer 10.

[0027] At the same time, as the temperature drops, the hot melt layer 3 can condense again and return to its initial thickness to prepare for subsequent melting heat absorption and thickness changes. It should be noted that the middle structural part of the filling layer 2 is fixed to the stress forming layer 10, and the axial cavity 15 is embedded and fixed to the filling layer 2, and the stress forming layer 10 is a highly elastic polymer material with a certain deformation ability, which can meet the thickness change of the hot melt layer 3, and the stress forming layer 10 is doped with high thermal conductivity fillers to ensure that the heat at the hot melt layer 3 can be smoothly transferred to the outer sheath 14 through the stress forming layer 10, thereby ensuring the heat dissipation effect of the cable.

[0028] In one of the more preferred embodiments, the gas filled in the axial capsule 4 is nitrogen, and the adsorbent 6 is a zeolite molecular sieve for adsorbing nitrogen.

[0029] like Figure 3 、 Figure 4 and Figure 8 As shown, the axial capsule 4 is filled with nitrogen, which can be adsorbed by the zeolite molecular sieve. When the temperature of the axial capsule 4 increases, the movement of the nitrogen intensifies, thereby promoting the zeolite molecular sieve to have a stronger adsorption capacity for nitrogen, thereby promoting the elastic axial sealing plate 8 to slide to promote the existence of redundant space in the axial groove. Similarly, when the temperature of the axial capsule 4 drops, it can promote the zeolite molecular sieve to release some of the adsorbed nitrogen molecules under the desorption phenomenon, thereby promoting the elastic axial sealing plate 8 to return to its original position, so as to promote the hot melt layer 3 to restore its original position and thickness.

[0030] It should be noted that during actual use, the type of gas in the axial capsule 4 and the corresponding adsorption material can be changed according to actual production needs. For example, the gas in the axial capsule 4 can be replaced with carbon dioxide, and the adsorption material can be replaced with activated carbon material for adsorbing carbon dioxide, thereby releasing gas when the temperature changes or further enhancing the adsorption capacity of gas.

[0031] Furthermore, the heat-melting layer 3 includes the following raw materials in a mass ratio: 5.5 to 17.5 parts of a resin matrix, 57.5 to 70.7 parts of a high thermal conductivity filler, and 0.3 to 1.5 parts of a coupling agent, wherein the high thermal conductivity filler is expanded graphite and carbon fiber.

[0032] Among them, the thermal conductivity of the heat-melting layer 3 is improved by using high thermal conductivity fillers to ensure that the heat can be subsequently conducted to the external structural layer through the heat-melting layer 3 to achieve the heat dissipation purpose of the cable core 1. At the same time, the high thermal conductivity filler can be made of expanded graphite, carbon fiber, boron nitride or graphene, and ensure that the high thermal conductivity material is evenly dispersed in the resin matrix to improve its thermal conductivity. At the same time, it is necessary to select a suitable phase change material according to the normal operating temperature of the cable core 1 to ensure that it has good phase change performance within the operating temperature range.

[0033] Furthermore, the stress-forming layer 10 is located between the hot melt layer 3 and the inner protective layer 11, and the stress-forming layer 10 is a high-elastic polymer material with a high thermal conductivity filler added, and includes the following raw materials in a mass ratio: 5.5 to 17.5 parts by weight of a polymer matrix, 57.5 to 70.7 parts by weight of a high thermal conductivity filler, 0.3 to 1.5 parts by weight of a coupling agent, and a phase change material.

[0034] The armor layer 12 is woven from stainless steel wires, the diameter of the stainless steel wires is between 0.2 and 0.8 mm, and the weaving density is not less than 80%.

[0035] like Figure 2 、 Figure 3 and Figure 5 As shown, the stress-forming layer 10 is a highly elastic polymer material with good elasticity. When the molten hot melt layer 3 enters the redundant space in the axial groove, it can automatically adjust its shape to fill the gap caused by the change in the thickness of the hot melt layer 3, thereby ensuring that the hot melt layer 3 can be in close contact with the stress-forming layer 10 regardless of whether it is in a molten state, thereby ensuring the heat conduction process, and the stress-forming layer 10 is doped with high thermal conductivity fillers to improve its thermal conductivity.

[0036] Specifically, when preparing the stress-forming layer 10, the polymer matrix and the phase change material are placed in a kneader together, heated until the phase change material is completely melted and mixed evenly, and the high thermal conductivity filler treated with a coupling agent is added to the above mixture, and mixing is continued to ensure that the filler is evenly dispersed, and then the mixture is formed by equipment such as an extruder.

[0037] At the same time, the armor layer 12 is woven from multiple strands of stainless steel wire. The stainless steel wire has high strength and good corrosion resistance, and can effectively resist external mechanical impact and chemical corrosion. By arranging the armor layer 12 on the outer layer of the inner protective layer 11, the mechanical strength and tensile performance of the power cable can be enhanced, and the wear resistance and crack resistance of the power cable can be improved, so that it can withstand greater external forces without being easily damaged. At the same time, it can also play a certain shielding role and reduce electromagnetic interference.

[0038] Furthermore, the fireproof layer 13 includes the following raw materials in a mass ratio: 30-40 parts of calcium carbonate, 8-12 parts of magnesium chloride, 15-25 parts of modified magnesium hydroxide, 15-20 parts of artificial mica, 10-15 parts of clay, 10-15 parts of aluminum silicate, 10-15 parts of antimony oxide, 5-10 parts of chlorinated paraffin, 10-15 parts of sodium silicate and 8-12 parts of adhesive.

[0039] like Figure 2 As shown, when preparing the raw materials of the fireproof layer 13, calcium carbonate, magnesium chloride, modified magnesium hydroxide, artificial mica, clay, aluminum silicate, antimony oxide, chlorinated paraffin, sodium silicate and styrene-butadiene rubber are added to a vacuum kneader and kneaded for 15 to 20 minutes. The kneaded materials are mixed in an internal mixer for 25 to 30 minutes to obtain a masterbatch. The masterbatch is extruded through a cable-specific extruder at 85-90°C and coated on the armor layer 12 to form the fireproof layer 13 used for the power cable. By setting the fireproof layer 13, additional fire protection is provided for the power cable in high-temperature environments such as fire, preventing the fire from spreading through the power cable.

[0040] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A power cable for electric power construction, comprising a plurality of cable cores (1) and a steel wire reinforcement core (5) arranged at the center of the plurality of cable cores (1), characterized in that: The cable core (5) further comprises a filling layer (2), an inner protective layer (11), an armor layer (12), a fireproof layer (13), and an outer protective layer (14) which are sequentially arranged from the inside to the outside at the center of the steel wire reinforcement core (5); the filling layer (2) is provided with a heat-resisting mechanism which prevents heat from being concentrated at the intersection of the plurality of cable cores (1) and which adaptively adjusts the heat dissipation capacity according to the operating temperature of the cable cores (1); The heat-resisting mechanism comprises a heat-melting layer (3) and a heat-resisting layer (10) arranged between the filling layer (2) and the inner protective layer (11), wherein the heat-melting layer (3) is located on a side close to the filling layer (2), and the heat-melting layer (3) is a phase change material added with a high thermal conductivity filler; The filling layer (2) is fixedly embedded with a group of axial capsules (4) corresponding to the positions of the plurality of cable cores (1), the axial capsules (4) are filled with gas, and an adsorbent (6) is fixedly connected to the axial capsules (4) for adsorbing the gas therein to change the amount of free gas in the axial capsules (4); The filling layer (2) is provided with a mountain-shaped elastic frame (7) embedded and fixed at the positions of the plurality of axial capsules (4), and an elastic axial sealing plate (8) is provided on the side of the mountain-shaped elastic frame (7) facing the heat-melting layer (3). An axial groove is provided at the position of the filling layer (2) corresponding to the mountain-shaped elastic frame (7), and an axial cavity (15) for sliding connection of the elastic axial sealing plate (8) is provided on the mountain-shaped elastic frame (7).

2. A power cable for electric power construction according to claim 1, characterized in that: The heat-melting layer (3) comprises the following raw materials in a mass ratio: 5.5 to 17.5 parts of a resin matrix, 57.5 to 70.7 parts of a high thermal conductivity filler, and 0.3 to 1.5 parts of a coupling agent; The high thermal conductivity filler is expanded graphite and carbon fiber.

3. A power cable for electric power construction according to claim 1, characterized in that: The gas filled in the axial capsule (4) is nitrogen, and the adsorbent (6) is a zeolite molecular sieve for adsorbing nitrogen.

4. A power cable for electric power construction according to claim 1, characterized in that: The mountain-shaped elastic frame (7) is provided with a plurality of groups of return air channels (9) at one end facing the axis bag (4), and the return air channels (9) are in gas communication with the axis bag (4); The partially melted heat-melting layer (3) enters the axial groove to reduce the thickness of its own structure.

5. The power cable for electric power construction according to claim 2, characterized in that: The stress-forming layer (10) is located between the hot melt layer (3) and the inner protective layer (11), and the stress-forming layer (10) is a high-elastic polymer material with a high thermal conductivity filler added, and includes the following raw materials in a mass ratio: 5.5 to 17.5 parts by weight of a polymer matrix, 57.5 to 70.7 parts by weight of a high thermal conductivity filler, 0.3 to 1.5 parts by weight of a coupling agent, and a phase change material.

6. The power cable for electric power construction according to claim 1, characterized in that: The armor layer (12) is woven from stainless steel wires, the diameter of the stainless steel wires is between 0.2 and 0.8 mm, and the weaving density is not less than 80%.

7. The power cable for electric power construction according to claim 1, characterized in that: The fireproof layer (13) comprises the following raw materials in a mass ratio: 30-40 parts of calcium carbonate, 8-12 parts of magnesium chloride, 15-25 parts of modified magnesium hydroxide, 15-20 parts of artificial mica, 10-15 parts of clay, 10-15 parts of aluminum silicate, 10-15 parts of antimony oxide, 5-10 parts of chlorinated paraffin, 10-15 parts of sodium silicate and 8-12 parts of adhesive.

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