Flat fire-resistant silicone rubber power cable

Abstract

The utility model discloses a flat fire-resistant silicone rubber power cable, comprising a cable core, the cable core comprises four wire cores and a flame-retardant filling layer, the four wire cores are linearly arranged at equal intervals, a mica belting layer is arranged outside the flame-retardant filling layer, and the mica belting layer is attached to the flame-retardant filling layer. An inner sheath is arranged outside the mica belting layer, the inner sheath and the mica belting layer are formed through extrusion, an armor layer is arranged outside the inner sheath, the armor layer is attached to the inner sheath, a composite fire-resistant core layer is arranged outside the armor layer, an outer sheath is arranged outside the composite fire-resistant core layer, and an outer sheath is arranged outside the outer sheath. The outer sheath, the armor layer and the composite fire-resistant core layer are formed through extrusion, the composite fire-resistant core layer is arranged in the power cable, and the composite fire-resistant core layer and the outer sheath are combined to form double-layer protection, so that the fire-resistant performance of the cable is greatly improved, an enough fireproof effect is achieved when a fire disaster occurs, and the use safety of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a flat fire-resistant silicone rubber power cable. Background Art

[0002] Power cable is a cable product used to transmit and distribute high-power electric energy in the main line of the power system, including power cables of various voltage levels and various insulations from 1-500KV and above. The basic structure of power cable consists of four parts: core, insulation layer, shielding layer and protective layer. It is often used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. It has many product types and a wide range of applications, involving power, construction, communications, manufacturing and other industries. Round cables are more commonly used, and there are also some flat cables with flat cross-sections. The molding method of flat cables is to sandwich a group of core wires evenly arranged at a certain distance between two plastic films, and bond the three together to form a flat cable through certain means.

[0003] The Chinese patent publication number is CN216084363U, and the authorization announcement date is March 18, 2022. A flat cable includes a cable line, the outer layer of the cable line is coated with an inner layer, the inner layer surface is bonded with a protective net, the protective net includes yarn a and yarn b, the yarn b is coated on the surface of yarn a, the outer surface of the protective net is coated with an outer layer, the outer layer surface is sprayed with an anti-aging layer, and the anti-aging layer surface is coated with an anti-aging layer. The outer layer, the protective net and the inner layer cooperate to improve the overall toughness of the cable, and can be bent multiple times; the anti-aging layer coated on the outer layer and the anti-aging layer cooperate to improve the overall aging resistance of the cable and extend its service life.

[0004] Existing power cables are fireproofed and flame-retardant through the outer sheath. The flame-retardant performance of silicone rubber is single. In the event of a fire, the silicone rubber will burn out and will not play a sufficient fireproof role, which reduces the safety of the cable when in use and cannot meet the use requirements. Utility Model Content

[0005] The utility model aims to provide a flat fire-resistant silicone rubber power cable to solve the problem in the above-mentioned background technology that the existing power cable is fire-proofed and flame-retardant through the outer sheath, the flame-retardant performance of the silicone rubber is single, and when a fire occurs, the silicone rubber burns out and fails to play a sufficient fire-proof role, which reduces the safety of the cable when in use and cannot meet the use requirements.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flat fire-resistant silicone rubber power cable, comprising a cable core, wherein the cable core comprises a wire core and a flame-retardant filling layer, wherein the wire core is arranged in four, and the four wire cores are arranged in a straight line and equidistantly, a mica tape layer is arranged on the outside of the flame-retardant filling layer, and the mica tape layer is fitted with the flame-retardant filling layer, an inner sheath is arranged on the outside of the mica tape layer, and the inner sheath and the mica tape layer are formed by extrusion, an armor layer is arranged on the outside of the inner sheath, and the armor layer is fitted with the inner sheath, a composite fire-resistant core layer is arranged on the outside of the armor layer, an outer sheath is arranged on the outside of the composite fire-resistant core layer, and the outer sheath, the armor layer and the composite fire-resistant core layer are formed by extrusion.

[0007] Preferably, the wire core includes a conductor, an insulating layer, a shielding layer and a protective mesh layer, the conductor is formed by twisting a plurality of copper wires, the insulating layer is arranged on the outside of the conductor, the shielding layer is arranged on the outside of the insulating layer, and the conductor, the insulating layer and the shielding layer are formed by extrusion, the protective mesh layer is arranged on the outside of the shielding layer, and the protective mesh layer is in contact with the shielding layer.

[0008] Preferably, the flame retardant filling layer is arranged in the gaps between the four wire cores, and the flame retardant filling layer and the wire cores are formed by extrusion, positioning strips are arranged inside the flame retardant filling layer, and the positioning strips are arranged above and below the wire cores, the positioning strips are arranged corresponding to the wire cores, and the positioning strips are arranged equidistantly along the direction of the wire cores.

[0009] Preferably, the outer sheath comprises a silicone rubber layer and an anti-aging coating, the anti-aging coating is arranged on the outer surface of the silicone rubber layer, and the anti-aging coating and the silicone rubber layer are coated as a whole.

[0010] Preferably, the composite fire-resistant core layer includes a ceramic silicone rubber layer and a waterproof layer, the waterproof layer is arranged on the outside of the ceramic silicone rubber layer, and the ceramic silicone rubber layer and the waterproof layer are arranged as a whole, the ceramic silicone rubber layer is bonded to the armor layer, and the waterproof layer is bonded to the silicone rubber layer.

[0011] Preferably, both the upper end surface and the lower end surface of the outer sheath are provided with arc grooves, three arc grooves are provided, and the three arc grooves are equidistantly arranged on the upper end surface and the lower end surface of the outer sheath, and the arc groove is arranged in the middle of two adjacent wire cores.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model device is provided with a composite fire-resistant core layer and an outer sheath. The composite fire-resistant core layer is composed of a double-layer structure of a ceramic silicone rubber layer and a waterproof layer. The ceramic silicone rubber is a new type of polymer refractory material that can quickly form a hard ceramic-like substance at high temperature. This substance has excellent fireproof and flame-retardant properties and can effectively prevent the spread of flames. During the combustion process, the amount of smoke generated by the ceramic silicone rubber is extremely low, and very little toxic gas is released, which is beneficial to protecting personnel safety and reducing the pollution of the environment by fire. In the fire, the integrity of the cable can be maintained to prevent the cable from being burned, ensuring the smooth flow of power, communication and other lines, and improving the flame-retardant effect of the power cable. The waterproof layer further isolates the corrosion of water vapor to the inside of the cable. The outer sheath is composed of a double-layer structure of a silicone rubber layer and an anti-aging coating. The anti-aging coating improves the overall aging resistance of the cable, can inhibit and delay the substances that cause light aging of the silicone rubber layer by ultraviolet rays, and can absorb or reflect ultraviolet rays, so that the cable can be used outdoors for a long time, extending its service life.

[0014] The utility model device is provided with a positioning strip, which plays a positioning and limiting role on four wire cores placed side by side, can prevent the wire cores from being offset, and can also improve the structural strength of the cable;

[0015] The utility model device arranges an arc groove, which plays a guiding role on the outer surface of the power cable and can also be used as a deformation groove, so that the power cable can be bent longitudinally for convenience and a gap can be formed when the power cables are stacked and connected for use, thereby ensuring the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 A partial enlarged view of area A;

[0018] Figure 3 It is a cross-sectional view of the wire core of the utility model;

[0019] Figure 4 This is a structural diagram of the outer sheath of the utility model;

[0020] Figure 5 This is a structural diagram of the composite fire-resistant core layer of the utility model.

[0021] In the figure: 1. Cable core; 2. Wire core; 3. Flame retardant filling layer; 4. Positioning strip; 5. Mica tape layer; 6. Inner sheath; 7. Outer sheath; 8. Arc groove; 9. Armor layer; 10. Composite fire-resistant core layer; 11. Conductor; 12. Insulation layer; 13. Shielding layer; 14. Protective mesh layer; 15. Silicone rubber layer; 16. Anti-aging coating; 17. Ceramic silicone rubber layer; 18. Waterproof layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] See also Figure 1-5 The utility model provides an embodiment: a flat fire-resistant silicone rubber power cable, comprising a cable core 1, the cable core 1 comprising a wire core 2 and a flame-retardant filling layer 3, the wire core 2 is arranged in four, and the four wire cores 2 are arranged in a straight line and equidistantly, a mica tape layer 5 is arranged outside the flame-retardant filling layer 3, and the mica tape layer 5 is fitted with the flame-retardant filling layer 3, an inner sheath 6 is arranged outside the mica tape layer 5, and the inner sheath 6 and the mica tape layer 5 are formed by extrusion, an armor layer 9 is arranged outside the inner sheath 6, and the armor layer 9 is fitted with the inner sheath 6, a composite fire-resistant core layer 10 is arranged outside the armor layer 9, an outer sheath 7 is arranged outside the composite fire-resistant core layer 10, and the outer sheath 7, the armor layer 9 and the composite fire-resistant core layer 10 are formed by extrusion.

[0024] See also Figure 1 and Figure 3 The wire core 2 includes a conductor 11, an insulating layer 12, a shielding layer 13 and a protective mesh layer 14. The conductor 11 is formed by twisting a plurality of copper wires. The insulating layer 12 is arranged on the outside of the conductor 11. The shielding layer 13 is arranged on the outside of the insulating layer 12. The conductor 11, the insulating layer 12 and the shielding layer 13 are formed by extrusion. The protective mesh layer 14 is arranged on the outside of the shielding layer 13, and the protective mesh layer 14 is in contact with the shielding layer 13.

[0025] See also Figure 1 and Figure 2 The flame retardant filling layer 3 is arranged in the gap between the four cores 2, and the flame retardant filling layer 3 and the cores 2 are formed by extrusion. Positioning strips 4 are arranged inside the flame retardant filling layer 3, and the positioning strips 4 are arranged above and below the cores 2. The positioning strips 4 are arranged corresponding to the cores 2, and the positioning strips 4 are arranged equidistantly along the direction of the cores 2. The positioning strips 4 play a positioning and limiting role for the four cores 2 placed side by side, which can prevent the cores 2 from being offset and improve the structural strength of the cable.

[0026] See also Figure 1 and Figure 4The outer sheath 7 includes a silicone rubber layer 15 and an anti-aging coating 16. The anti-aging coating 16 is arranged on the outer surface of the silicone rubber layer 15, and the anti-aging coating 16 and the silicone rubber layer 15 are coated as a whole. The anti-aging coating 16 improves the overall aging resistance of the cable, can inhibit and delay the ultraviolet rays from causing light aging to the silicone rubber layer 15, and can absorb or reflect ultraviolet rays to prevent or limit it from penetrating the inside of the silicone rubber layer 15, so that the cable can be used outdoors for a long time, and will not change color or become brittle when used in the sun for a long time, can avoid aging of the cable caused by ultraviolet rays, and extend its service life.

[0027] See also Figure 2 and Figure 5 The composite fire-resistant core layer 10 includes a ceramic silicone rubber layer 17 and a waterproof layer 18. The waterproof layer 18 is arranged on the outside of the ceramic silicone rubber layer 17, and the ceramic silicone rubber layer 17 and the waterproof layer 18 are arranged as a whole. The ceramic silicone rubber layer 17 is bonded to the armor layer 9, and the waterproof layer 18 is bonded to the silicone rubber layer 15. Ceramic silicone rubber is a new type of polymer refractory material that can quickly form a hard ceramic-like substance at high temperature. This substance has excellent fireproof and flame retardant properties and can effectively prevent the spread of flames. During the combustion process, the amount of smoke generated by the ceramic silicone rubber is extremely low, and the amount of toxic gas released is extremely small, which is beneficial to protecting personnel safety and reducing the pollution of the environment caused by fire. In a fire, the integrity of the cable can be maintained to prevent the cable from being burned, ensure the smooth flow of power, communication and other lines, and improve the flame retardant effect of the power cable. The waterproof layer 18 further isolates the water vapor from eroding the inside of the cable and extends the service life of the cable.

[0028] See also Figure 1 and Figure 4 The upper and lower end surfaces of the outer sheath 7 are both provided with arc grooves 8. There are three arc grooves 8, and the three arc grooves 8 are equidistantly arranged on the upper and lower end surfaces of the outer sheath 7. The arc groove 8 is arranged in the middle of two adjacent cores 2. The outer surface of the power cable plays a guiding role through the arc groove 8, and can also serve as a deformation groove, which is convenient for longitudinal bending of the power cable. When the power cables are stacked and connected for use, gaps are formed to ensure the heat dissipation effect.

[0029] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0030] 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 flat fire-resistant silicone rubber power cable, comprising a cable core (1), characterized in that: The cable core (1) comprises a wire core (2) and a flame retardant filling layer (3), wherein four wire cores (2) are arranged, and the four wire cores (2) are arranged in a straight line and equidistantly, a mica tape layer (5) is arranged outside the flame retardant filling layer (3), and the mica tape layer (5) is in contact with the flame retardant filling layer (3), an inner sheath (6) is arranged outside the mica tape layer (5), and the inner sheath (6) and the mica tape layer (5) are formed by extrusion, an armor layer (9) is arranged outside the inner sheath (6), and the armor layer (9) is in contact with the inner sheath (6), a composite fire-resistant core layer (10) is arranged outside the armor layer (9), an outer sheath (7) is arranged outside the composite fire-resistant core layer (10), and the outer sheath (7), the armor layer (9) and the composite fire-resistant core layer (10) are formed by extrusion.

2. A flat fire-resistant silicone rubber power cable according to claim 1, characterized in that: The wire core (2) comprises a conductor (11), an insulating layer (12), a shielding layer (13) and a protective mesh layer (14); the conductor (11) is formed by twisting a plurality of copper wires; the insulating layer (12) is arranged outside the conductor (11); the shielding layer (13) is arranged outside the insulating layer (12); the conductor (11), the insulating layer (12) and the shielding layer (13) are formed by extrusion; the protective mesh layer (14) is arranged outside the shielding layer (13); and the protective mesh layer (14) and the shielding layer (13) are in contact with each other.

3. A flat fire-resistant silicone rubber power cable according to claim 1, characterized in that: The flame retardant filling layer (3) is arranged at the gaps between the four wire cores (2), and the flame retardant filling layer (3) and the wire cores (2) are formed by extrusion. Positioning strips (4) are arranged inside the flame retardant filling layer (3), and the positioning strips (4) are arranged above and below the wire cores (2). The positioning strips (4) are arranged corresponding to the wire cores (2), and the positioning strips (4) are arranged equidistantly along the direction of the wire cores (2).

4. A flat fire-resistant silicone rubber power cable according to claim 1, characterized in that: The outer sheath (7) comprises a silicone rubber layer (15) and an anti-aging coating (16); the anti-aging coating (16) is arranged on the outer surface of the silicone rubber layer (15), and the anti-aging coating (16) and the silicone rubber layer (15) are coated as a whole.

5. A flat fire-resistant silicone rubber power cable according to claim 4, characterized in that: The composite fire-resistant core layer (10) comprises a ceramic silicone rubber layer (17) and a waterproof layer (18); the waterproof layer (18) is arranged outside the ceramic silicone rubber layer (17), and the ceramic silicone rubber layer (17) and the waterproof layer (18) are arranged as a whole; the ceramic silicone rubber layer (17) is in contact with the armor layer (9), and the waterproof layer (18) is in contact with the silicone rubber layer (15).

6. A flat fire-resistant silicone rubber power cable according to claim 1, characterized in that: The upper end surface and the lower end surface of the outer sheath (7) are both provided with arc-shaped grooves (8), three arc-shaped grooves (8) are provided, and the three arc-shaped grooves (8) are equidistantly arranged on the upper end surface and the lower end surface of the outer sheath (7), and the arc-shaped grooves (8) are arranged in the middle of two adjacent wire cores (2).

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