Corrosion-resistant fire-resistant low-smoke halogen-free crosslinked polyethylene cable

Abstract

The utility model discloses a corrosion-resistant fire-resistant low-smoke halogen-free cross-linked polyethylene cable, relates to the technical field of cross-linked polyethylene cables, and aims to solve the problem that after the conventional halogen-free cross-linked polyethylene cable is used for a long time, the halogen-free cross-linked polyethylene cable is likely to be corroded. Therefore, the use of the halogen-free crosslinked polyethylene cable is influenced. The cable core comprises a plurality of wire cores and a filling layer, the filling layer is arranged at the gap between the wire cores and the cable core, the wire core comprises a conductor, an inner shielding layer and a polyethylene insulating layer, the inner shielding layer is arranged outside the conductor, the polyethylene insulating layer is arranged outside the inner shielding layer, the wrapping tape layer is arranged outside the cable core, and the wrapping tape layer is arranged outside the cable core. An outer shielding layer is arranged outside the wrapping tape layer, an inner protection layer is arranged outside the outer shielding layer, an anti-corrosion armor layer is arranged outside the inner protection layer, and a polyethylene outer sheath is arranged outside the anti-corrosion armor layer.

Description

Technical Field

[0001] The utility model relates to the technical field of cross-linked polyethylene cables, in particular to a corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable. Background Art

[0002] Cross-linked polyethylene cable is a type of cable suitable for use in distribution networks and other fields. It is widely used because of its excellent electrical and heat resistance, large transmission capacity, light structure, easy bending, simple accessory joints, easy installation and laying, and no restrictions on height differences. In particular, there is no risk of oil leakage and fire. Polyethylene is a polymer of ethylene, non-toxic, easy to color, chemically stable, cold-resistant, radiation-resistant, and has good electrical insulation properties. Therefore, it is often used as insulating material for cables.

[0003] After searching, the authorization announcement number CN210039678U discloses a flame-retardant fire-resistant low-smoke halogen-free cross-linked polyethylene cable, including a polyethylene layer, an asphalt layer is attached to the inner wall of the polyethylene layer, and eight groups of steel strands are evenly arranged around the center of the asphalt layer, a gap layer is attached to the inner wall of the asphalt layer, and a nickel-plated copper wire braided layer is attached to the inner wall of the gap layer, a paraffin layer is attached to the inner wall of the nickel-plated copper wire braided layer, and several groups of copper rings are evenly inserted in the center of the paraffin layer, and two groups of auxiliary rods are hingedly connected between two adjacent groups of copper rings, and an inner lining ethylene layer is attached to the inner wall of the paraffin layer, and a wire clamp is arranged in the center of the inner lining ethylene layer. The two groups of air are used as the medium inside and outside the gap layer to reduce the temperature interaction between the center and the outside of the cable, and the gap layer is used to improve the bending ability and collision resistance of the cable.

[0004] However, after the existing halogen-free cross-linked polyethylene cables have been used for a long time, the halogen-free cross-linked polyethylene cables may be corroded, which affects the use of the halogen-free cross-linked polyethylene cables. Therefore, the market is in urgent need of a corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable to solve these problems. Utility Model Content

[0005] The utility model aims to provide a corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable to solve the problem in the above-mentioned background technology that the existing halogen-free cross-linked polyethylene cable may be corroded after being used for a long time, thus affecting the use of the halogen-free cross-linked polyethylene cable.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable, comprising a cable core, the cable core comprising multiple wire cores and a filling layer, a filling layer being arranged at the gap between the wire core and the cable core, the wire core comprising a conductor, an inner shielding layer and a polyethylene insulation layer, the inner shielding layer being arranged on the outside of the conductor, a polyethylene insulation layer being arranged on the outside of the inner shielding layer, a tape layer being arranged on the outside of the cable core, an outer shielding layer being arranged on the outside of the tape layer, an inner protective layer being arranged on the outside of the outer shielding layer, an anti-corrosion armor layer being arranged on the outside of the inner protective layer, and a polyethylene outer sheath being arranged on the outside of the anti-corrosion armor layer.

[0007] Preferably, the conductor is formed by twisting a plurality of copper wires.

[0008] Preferably, the inner protective layer includes a polyethylene anti-corrosion layer and an anti-corrosion coating layer, the anti-corrosion coating layer is arranged outside the polyethylene anti-corrosion layer, the anti-corrosion coating layer is an anti-corrosion spray powder, and the thickness of the anti-corrosion coating layer is 0.3mm-0.6mm.

[0009] Preferably, the tape layer is formed by wrapping a mica tape.

[0010] Preferably, the anti-corrosion armor layer comprises an armored steel belt and an anti-corrosion coating, the exterior of the armored steel belt is coated with the anti-corrosion coating, and the thickness of the anti-corrosion coating is 0.2 mm-0.5 mm.

[0011] Preferably, the armored steel belts are wound and braided.

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

[0013] This kind of corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable has a tape layer formed by wrapping mica tape, which can better protect the wire core and make this kind of low-smoke, halogen-free cross-linked polyethylene cable have better fire resistance. The inner protective layer includes a polyethylene anti-corrosion layer and an anti-corrosion coating layer. The thickness of the anti-corrosion spray powder is reached to 0.3mm-0.6mm by spraying the anti-corrosion spray powder on the outside of the polyethylene anti-corrosion layer for many times. This can further improve the anti-corrosion effect of the inner protective layer, so that the inner protective layer can protect the wire core well.

[0014] This kind of corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable has an anti-corrosion coating coated on the outside of the armored steel belt, which makes the armored steel belt have a better anti-corrosion effect, and the low-smoke, halogen-free cross-linked polyethylene cable can be protected by the polyethylene outer sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall cross-sectional view of the utility model;

[0016] Figure 2 This is a cross-sectional view of the inner protective layer of the utility model;

[0017] Figure 3 This is the installation structure diagram of the armored steel belt of the utility model;

[0018] Figure 4 It is a cross-sectional view of the anti-corrosion armor layer of the utility model.

[0019] In the figure: 1. cable core; 2. filling layer; 3. wire core; 4. conductor; 5. inner shielding layer; 6. polyethylene insulation layer; 7. tape layer; 8. outer shielding layer; 9. inner protective layer; 10. polyethylene anti-corrosion layer; 11. anti-corrosion coating layer; 12. anti-corrosion armor layer; 1201. armored steel tape; 1202. anti-corrosion coating; 13. polyethylene outer sheath. Implementation

[0020] 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.

[0021] See also Figure 1-4 The utility model provides an embodiment: a corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable, comprising a cable core 1, the cable core 1 comprising a plurality of wire cores 3 and a filling layer 2, a filling layer 2 is arranged at the gap between the wire core 3 and the cable core 1, the wire core 3 comprises a conductor 4, an inner shielding layer 5 and a polyethylene insulation layer 6, the inner shielding layer 5 is arranged outside the conductor 4, the polyethylene insulation layer 6 is arranged outside the inner shielding layer 5, a tape layer 7 is arranged outside the cable core 1, an outer shielding layer 8 is arranged outside the tape layer 7, an inner protective layer 9 is arranged outside the outer shielding layer 8, an anti-corrosion armor layer 12 is arranged outside the inner protective layer 9, and a polyethylene outer sheath 13 is arranged outside the anti-corrosion armor layer 12. It should be noted that in order to save space and highlight the innovative elements of this patent, such as the specific working principle and working process of the low-smoke, halogen-free cross-linked polyethylene cable, and the process of how to install it, they will not be repeated in this patent.

[0022] When in use, the conductor 4 formed by twisting copper wires has higher structural strength. The inner shielding layer 5 and the polyethylene insulation layer 6 are set to make the conductor 4 have a good insulation shielding effect. The tape layer 7 formed by wrapping the mica tape can better protect the core 3. The inner protective layer 9 includes a polyethylene anti-corrosion layer 10 and an anti-corrosion coating layer 11. The anti-corrosion spray powder is sprayed on the outside of the polyethylene anti-corrosion layer 10 for many times so that the thickness of the anti-corrosion spray powder reaches 0.3mm-0.6mm, which can further improve the anti-corrosion effect of the inner protective layer 9. The armored steel belt 1201 can improve the protective effect of the low-smoke halogen-free cross-linked polyethylene cable. The anti-corrosion coating 1202 is coated on the outside of the armored steel belt 1201, so that the armored steel belt 1201 can have a better anti-corrosion effect.

[0023] See also Figure 1 The conductor 4 is formed by twisting a plurality of copper wires, which can make the structural strength of the conductor 4 higher.

[0024] See also Figure 1 and Figure 2 The inner protective layer 9 includes a polyethylene anti-corrosion layer 10 and an anti-corrosion coating layer 11. The anti-corrosion coating layer 11 is arranged on the outside of the polyethylene anti-corrosion layer 10. The anti-corrosion coating layer 11 is an anti-corrosion spray powder. The thickness of the anti-corrosion coating layer 11 is 0.3mm-0.6mm. The polyethylene anti-corrosion layer 10 is arranged to make the inner protective layer 9 have good anti-corrosion properties. By spraying the anti-corrosion spray powder multiple times, the thickness of the anti-corrosion spray powder reaches 0.3mm-0.6mm. This can further improve the anti-corrosion effect of the inner protective layer 9, so that the inner protective layer 9 can well protect the wire core 3.

[0025] See also Figure 1 The tape layer 7 is formed by wrapping mica tape, which has a good fireproofing effect. By wrapping the mica tape, no gaps are left, so that the core 3 can be better protected, so that the low-smoke halogen-free cross-linked polyethylene cable has better fireproofing performance.

[0026] See also Figure 1 and Figure 4 The anti-corrosion armor layer 12 includes an armored steel belt 1201 and an anti-corrosion coating 1202. The outside of the armored steel belt 1201 is coated with the anti-corrosion coating 1202. The thickness of the anti-corrosion coating 1202 is 0.2mm-0.5mm. The armored steel belt 1201 can improve the protective effect of the low-smoke halogen-free cross-linked polyethylene cable. By coating the anti-corrosion coating 1202 on the outside of the armored steel belt 1201, the armored steel belt 1201 can have a better anti-corrosion effect, thereby enabling the low-smoke halogen-free cross-linked polyethylene cable to have better anti-corrosion performance.

[0027] See also Figure 2The armored steel belt 1201 is wound and woven, and this arrangement enables the armored steel belt 1201 to provide better protection.

[0028] Working principle: When in use, the conductor 4 formed by twisting copper wires has a higher structural strength. The inner shielding layer 5 and the polyethylene insulation layer 6 are provided to make the conductor 4 have a good insulation shielding effect, so as to avoid the mutual influence between the wire cores 3 during use. The tape layer 7 formed by wrapping with mica tape can better protect the wire core 3, so that the low-smoke halogen-free cross-linked polyethylene cable has better fire resistance. The inner protective layer 9 includes a polyethylene anti-corrosion layer 10 and an anti-corrosion coating layer 11. By spraying the polyethylene anti-corrosion layer 10 multiple times, the anti-corrosion coating layer 11 is coated with a polyethylene anti-corrosion coating layer 11. The anti-corrosion spray powder makes the thickness of the anti-corrosion spray powder reach 0.3mm-0.6mm, which can further improve the anti-corrosion effect of the inner protective layer 9, so that the inner protective layer 9 can protect the wire core 3 well, and the armored steel belt 1201 can improve the protection effect of the low-smoke halogen-free cross-linked polyethylene cable. By coating the anti-corrosion coating 1202 on the outside of the armored steel belt 1201, the armored steel belt 1201 can have a better anti-corrosion effect, and the polyethylene outer sheath 13 can protect the low-smoke halogen-free cross-linked polyethylene cable.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable, comprising a cable core (1), characterized in that: The cable core (1) comprises a plurality of wire cores (3) and a filling layer (2); a filling layer (2) is provided at a gap between the wire core (3) and the cable core (1); the wire core (3) comprises a conductor (4), an inner shielding layer (5) and a polyethylene insulation layer (6); the inner shielding layer (5) is provided outside the conductor (4); the polyethylene insulation layer (6) is provided outside the inner shielding layer (5); a tape layer (7) is provided outside the cable core (1); an outer shielding layer (8) is provided outside the tape layer (7); an inner protective layer (9) is provided outside the outer shielding layer (8); an anti-corrosion armor layer (12) is provided outside the inner protective layer (9); and a polyethylene outer sheath (13) is provided outside the anti-corrosion armor layer (12).

2. The corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable according to claim 1, characterized in that: The conductor (4) is formed by twisting a plurality of copper wires.

3. The corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable according to claim 1, characterized in that: The inner protective layer (9) comprises a polyethylene anti-corrosion layer (10) and an anti-corrosion coating layer (11); an anti-corrosion coating layer (11) is arranged outside the polyethylene anti-corrosion layer (10); the anti-corrosion coating layer (11) is an anti-corrosion spray powder; and the thickness of the anti-corrosion coating layer (11) is 0.3 mm to 0.6 mm.

4. The corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable according to claim 3, characterized in that: The tape layer (7) is formed by wrapping a mica tape.

5. The corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable according to claim 1, characterized in that: The anti-corrosion armor layer (12) comprises an armored steel strip (1201) and an anti-corrosion coating (1202); the exterior of the armored steel strip (1201) is coated with the anti-corrosion coating (1202); and the thickness of the anti-corrosion coating (1202) is 0.2 mm to 0.5 mm.

6. The corrosion-resistant, fire-resistant, low-smoke, halogen-free cross-linked polyethylene cable according to claim 5, characterized in that: The armored steel belt (1201) is formed by winding and braiding.

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