Environment-friendly corrosion-resistant medium-voltage cross-linked flexible fireproof cable

Abstract

The utility model discloses an environment-friendly corrosion-resistant medium-voltage cross-linked flexible fireproof cable, which relates to the technical field of cables, and comprises a cable core, three groups of mutually twisted wire cores are arranged in the cable core, each wire core is composed of a conductor, a conductor shielding layer, an inner insulating layer and an insulating shielding layer, an armor layer is arranged outside the cable core, and the inner insulating layer is arranged outside the armor layer. The armor layer is composed of a base layer and a reinforcing layer, an environment-friendly flame-retardant layer is arranged outside the armor layer, the environment-friendly flame-retardant layer is composed of a flame-retardant inner layer, a heat insulation layer and a flame-retardant outer layer, an outer sheath is arranged outside the environment-friendly flame-retardant layer, and the outer sheath is composed of an anti-corrosion layer, a reinforcing layer, a waterproof blocking layer and a wear-resistant anti-ultraviolet layer. The problems that a large amount of smoke is generated when the fireproof cable burns and the flame retardant performance of the flame retardant layer is easily reduced due to environmental factors are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a kind of environment-friendly corrosion-resistant medium-pressure crosslinking flexible fireproof cable. BACKGROUND

[0002] Fireproof cable is the high-performance cable specially designed for maintaining power transmission in extreme high-temperature environment such as fire, which adopts special fire-resistant materials and structural design, can effectively block flame spread and resist high-temperature burning when fire occurs, to ensure the circuit continues to work for a certain period of time, providing power support for key facilities such as emergency lighting, fire fighting system and evacuation indication. This type of cable not only has excellent flame retardance and low smoke and non-toxic characteristics, but also can maintain electrical insulation performance at high temperature, reducing secondary disasters caused by fire, is an important defense line to protect personnel safety and reduce property loss, and is widely used in high-rise buildings, subways, tunnels, petrochemical industries and other places with extremely high fire safety requirements.

[0003] For example, the Chinese authorized patent "Fireproof cable" with publication number CN209571256U includes a conductive cable core and an aluminum foil layer arranged outside the conductive cable core, and an aluminum foil, a first flame-retardant layer, an elastic buffer layer, a phase change temperature control layer, a second flame-retardant layer and a wear-resistant layer are arranged outside the aluminum foil layer in sequence. Through the above scheme, the first flame-retardant layer can prevent combustion when the temperature of the aluminum foil rises, avoiding the burning of the outer structure, and the elastic buffer layer can ensure the flexibility and pressure-bearing capacity of the cable; the phase change temperature control layer can change phase when the external or internal temperature rises or falls, and absorb and release heat during the phase change, so that the cable has certain temperature self-regulating ability.

[0004] The above-mentioned prior art has certain flame-retardant effect, but generates a large amount of smoke and toxic gas when heated, which is harmful to the environment and rescue personnel, and the flame-retardant layer inside the cable is easy to lose stability due to the complexity of the installation environment, thereby affecting the flame-retardant effect, thus not meeting the existing demand. Therefore, we propose an environment-friendly corrosion-resistant medium-pressure crosslinking flexible fireproof cable. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an environment-friendly corrosion-resistant medium-pressure crosslinking flexible fireproof cable to solve the problem of a large amount of smoke generated by the fireproof cable during combustion and the flame-retardant layer being easy to cause the flame-retardant performance to decrease due to environmental factors.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of environment-friendly corrosion-resistant medium-pressure crosslinking flexible fireproof cable, including cable core, the inside of the cable core is equipped with three groups of mutually twisted wire core, the wire core is composed of conductor, conductor shield layer, inner insulating layer and insulating shield layer, the outside of the cable core is provided with armour layer, the armour layer is composed of base layer and reinforcing layer, the outside of the armour layer is provided with environment-friendly flame-retardant layer, the environment-friendly flame-retardant layer is composed of flame-retardant inner layer, heat insulation layer and flame-retardant outer layer, the outside of the environment-friendly flame-retardant layer is provided with outer sheath, the outer sheath is composed of anticorrosive layer, reinforcing layer, waterproof barrier layer and wear-resistant ultraviolet resistant layer.

[0007] Preferably, the conductor is twisted by multiple strands of electrolytic copper wire, the conductor shield layer is wrapped on the outside of the conductor by extrusion equipment, the inner insulating layer is wrapped on the outer wall of the conductor shield layer by extrusion equipment, and the insulating shield layer is wrapped on the outer wall of the inner insulating layer by extrusion equipment.

[0008] Preferably, the base layer is spirally wound on the outside of the cable core, and the reinforcing layer is wrapped on the outer wall of the base layer.

[0009] Preferably, the flame-retardant inner layer is wrapped on the outside of the armour layer in multiple layers, the heat insulation layer is fixed on the outside of the flame-retardant inner layer by an adhesive, and the flame-retardant outer layer is fixed on the outer wall of the heat insulation layer by an adhesive.

[0010] Preferably, the anticorrosive layer is coated on the outside of the environment-friendly flame-retardant layer, the reinforcing layer is spirally wound on the outside of the anticorrosive layer, the waterproof barrier layer is extruded on the outer wall of the reinforcing layer, and the wear-resistant ultraviolet resistant layer is extruded on the outer wall of the waterproof barrier layer.

[0011] Preferably, the gap between the cable core and the wire core is filled with epoxy resin.

[0012] Preferably, the outer wall of the outer sheath is uniformly dispersed with wear-resistant particles.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、The composite environment-friendly flame-retardant layer of the utility model is composed of multiple high-flame-retardant materials, which can significantly improve the flame-retardant performance of the cable. In the event of a fire, it can quickly form a heat barrier to prevent the spread of flames and gain valuable time for fire fighting. The materials used in this layer are all environmentally friendly materials that do not produce toxic gases and a large amount of smoke when burning, reducing the harm to the environment and human body, meeting the environmental protection requirements of modern society. The presence of the heat insulation layer can slow down the impact of the fire on the inside of the cable, protecting the wire core from damage. This helps to maintain the stability of the electrical performance of the cable in a fire and ensures the safe operation of the power system. In the event of a fire, it can slow down the spread of the fire, providing more time for evacuation and fire fighting.

[0015] 2、The inner layer of the outer sheath is made of an environmentally friendly corrosion-resistant material, which can resist the corrosion of various corrosive media for a long time, ensuring that the cable can also operate stably in harsh environments, the waterproof barrier layer forms an effective waterproof barrier to prevent moisture from penetrating into the cable, the reinforcing layer is made of recyclable glass fiber reinforced material, which significantly improves the mechanical strength and impact resistance of the outer sheath, protects the cable from external damage, the outer wear-resistant ultraviolet-resistant layer is made of a material with high wear resistance and adds an ultraviolet-resistant agent, effectively resisting external friction, wear and ultraviolet radiation, prolonging the service life of the cable.

[0016] 3、The armored layer of the utility model can significantly enhance the mechanical strength of the cable, so that it can resist external pressure, tension, impact and other mechanical stress, ensuring that the cable can also operate stably in harsh environments, at the same time, the armored layer as a shielding layer of the cable can effectively shield external electromagnetic interference, reduce signal interference and noise inside the cable, improve the transmission quality and stability of the cable, in addition, it can protect the cable from chemical corrosion, environmental erosion and other damages, prolonging the service life of the cable. Especially for the cable that needs to be exposed to outdoor or harsh environment for a long time, the protection of the armored layer is particularly important. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the utility model;

[0018] Figure 2 It is a schematic view of the internal structure of the utility model;

[0019] Figure 3 It is a schematic view of the armored layer structure of the utility model;

[0020] Figure 4 It is a schematic view of the environmentally friendly flame-retardant layer structure of the utility model;

[0021] Figure 5 It is a schematic view of the outer sheath structure of the utility model.

[0022] In the figure: 1, cable core; 2, wire core; 21, conductor; 22, conductor shielding layer; 23, inner insulation layer; 24, insulation shielding layer; 3, armored layer; 31, base layer; 32, reinforcing layer; 4, environmentally friendly flame-retardant layer; 41, flame-retardant inner layer; 42, heat insulation layer; 43, flame-retardant outer layer; 5, outer sheath; 51, corrosion-resistant layer; 52, reinforcing layer; 53, waterproof barrier layer; 54, wear-resistant ultraviolet-resistant layer; 6, wear-resistant particles; 7, epoxy resin. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0024] Please refer to Figure 1 and Figure 2 , the utility model provides an embodiment: a kind of environment-friendly corrosion-resistant medium-pressure crosslinking flexible fireproof cable, including cable core 1, the inside of cable core 1 is equipped with three groups of mutually twisted wire core 2, wire core 2 is composed of conductor 21, conductor shield layer 22, inner insulating layer 23 and insulation shield layer 24, conductor 21 is twisted by multiple strands of electrolytic copper wire, conductor shield layer 22 is wrapped on the outside of conductor 21 by extrusion equipment, inner insulating layer 23 is wrapped on the outer wall of conductor shield layer 22 by extrusion equipment, insulation shield layer 24 is wrapped on the outer wall of inner insulating layer 23 by extrusion equipment, cable core 1 and the gap of wire core 2 are filled with epoxy resin 7, conductor 21 uses high-purity, low resistivity electrolytic copper, to ensure excellent electrical conductivity and thermal stability, as the core part of cable core, conductor carries the transmission task of current;Conductor shield layer 22 is semiconductive rubber, tightly in the outer layer of conductor, for improving the electric field distribution of conductor surface, reduce electromagnetic interference;Inner insulating layer 23 is crosslinked polyethylene, XLPE passes through chemical or physical crosslinking process, polyethylene molecule is changed from linear structure into three-dimensional network structure, thereby significantly improve the aging resistance, mechanical properties and environmental adaptability of material.In addition, XLPE also has good electrical properties, can withstand higher voltage grade;Insulation shield layer 24 is in close contact with inner insulating layer 23, for further protecting insulating layer and reducing external electromagnetic interference, also select similar semiconductive rubber with conductor shield layer, to ensure good electric field distribution and electromagnetic compatibility.

[0025] Use high-purity, low resistivity electrolytic copper as conductor material, ensure that the cable has excellent electrical conductivity, can efficiently, stably transmit current, crosslinked polyethylene insulating layer has excellent insulating property, can withstand high voltage grade, effectively prevent current leakage and short circuit accident, XLPE insulating layer forms three-dimensional network structure through crosslinking process, significantly improve the mechanical strength and toughness of material, so that cable can resist external mechanical stress and impact, the design of conductor shield layer and insulation shield layer effectively reduces electromagnetic interference, improves the electromagnetic compatibility of cable, so that cable can also work stably in complex electromagnetic environment.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3The outer part of the cable core 1 is provided with an armor layer 3, the armor layer 3 is composed of a base layer 31 and a reinforcing layer 32, the base layer 31 is spirally wound outside the cable core 1, and the reinforcing layer 32 is wrapped on the outer wall of the base layer 31, the base layer 31 is a cold-rolled steel strip, has good mechanical strength and corrosion resistance, can effectively resist external pressure and tension, and protect the cable from damage; the reinforcing layer 32 is glass fiber, has the advantages of light weight, high strength and good corrosion resistance, and can further improve the performance and service life of the cable.

[0027] Please refer to Figure 1 , Figure 2 and Figure 4 , the outer part of the armor layer 3 is provided with an environmentally friendly flame-retardant layer 4, the environmentally friendly flame-retardant layer 4 is composed of a flame-retardant inner layer 41, a heat insulation layer 42 and a flame-retardant outer layer 43, the flame-retardant inner layer 41 is wrapped outside the armor layer 3 in multiple layers, the heat insulation layer 42 is fixed outside the flame-retardant inner layer 41 by an adhesive, and the flame-retardant outer layer 43 is fixed on the outer wall of the heat insulation layer 42 by an adhesive, the flame-retardant inner layer 41 is selected from ceramicized fireproof silicone rubber composite tape or high-flame-retardant glass fiber tape. These materials have excellent flame-retardant performance, can quickly form a heat barrier to prevent the spread of fire when a fire occurs; the heat insulation layer 42 is made of inorganic flame-retardant materials, such as mica tape or special ceramic materials. These materials have good heat insulation performance, can slow down the impact of fire on the inside of the cable, and protect the wire core from damage; the flame-retardant outer layer 43 is made of low-smoke halogen-free flame-retardant polyolefin material, which will not produce toxic gas and a large amount of smoke when burning, meeting the environmental protection requirements, and having certain flame-retardant performance.

[0028] Please refer to Figure 1 , Figure 2 and Figure 5 , the outer part of the environmentally friendly flame-retardant layer 4 is provided with an outer sheath 5, the outer sheath 5 is composed of a corrosion-resistant layer 51, an enhanced layer 52, a waterproof barrier layer 53 and a wear-resistant ultraviolet-resistant layer 54, the outer wall of the outer sheath 5 is uniformly dispersed with wear-resistant particles 6, the corrosion-resistant layer 51 is coated on the outer part of the environmentally friendly flame-retardant layer 4, the enhanced layer 52 is spirally wound on the outer part of the corrosion-resistant layer 51, the waterproof barrier layer 53 is extruded on the outer wall of the enhanced layer 52, and the wear-resistant ultraviolet-resistant layer 54 is extruded on the outer wall of the waterproof barrier layer 53, the corrosion-resistant layer 51 is made of environmentally friendly epoxy resin, has excellent chemical stability, and can resist the corrosion of various acid, alkali and salt corrosion media; the enhanced layer 52 is glass fiber, which enhances the mechanical strength of the outer sheath; the waterproof barrier layer 53 is high-density polyethylene, which forms a continuous waterproof layer through a co-extrusion or coating process; the wear-resistant ultraviolet-resistant layer 54 is made of polyurethane with strong wear resistance and added with an ultraviolet-resistant agent to improve the weather resistance and service life of the outer sheath.

[0029] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. An environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable, comprising a cable core (1), characterized in that: The cable core (1) is provided with three groups of mutually twisted cores (2) inside, and the cores (2) are composed of a conductor (21), a conductor shielding layer (22), an inner insulating layer (23) and an insulating shielding layer (24). The cable core (1) is provided with an armor layer (3) outside, and the armor layer (3) is composed of a base layer (31) and a reinforcement layer (32). The armor layer (3) is provided with an environmentally friendly flame-retardant layer (4) outside, and the environmentally friendly flame-retardant layer (4) is composed of a flame-retardant inner layer (41), a heat-insulating layer (42) and a flame-retardant outer layer (43). The environmentally friendly flame-retardant layer (4) is provided with an outer sheath (5) outside, and the outer sheath (5) is composed of an anti-corrosion layer (51), a reinforcement layer (52), a waterproof barrier layer (53) and a wear-resistant and anti-ultraviolet layer (54).

2. The environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The conductor (21) is formed by twisting a plurality of electrolytic copper wires, the conductor shielding layer (22) is wrapped around the outside of the conductor (21) by an extrusion device, the inner insulating layer (23) is wrapped around the outer wall of the conductor shielding layer (22) by an extrusion device, and the insulating shielding layer (24) is wrapped around the outer wall of the inner insulating layer (23) by an extrusion device.

3. The environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The base layer (31) is spirally wound on the outside of the cable core (1), and the strengthening layer (32) is wrapped around the outer wall of the base layer (31).

4. The environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The flame retardant inner layer (41) is wrapped around the outside of the armor layer (3) in multiple layers, the heat insulation layer (42) is fixed to the outside of the flame retardant inner layer (41) by adhesive, and the flame retardant outer layer (43) is fixed to the outer wall of the heat insulation layer (42) by adhesive.

5. The environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The anti-corrosion layer (51) is coated on the outside of the environmentally friendly flame-retardant layer (4), the reinforcing layer (52) is spirally wound on the outside of the anti-corrosion layer (51), the waterproof barrier layer (53) is extruded on the outer wall of the reinforcing layer (52), and the wear-resistant and anti-ultraviolet layer (54) is extruded on the outer wall of the waterproof barrier layer (53).

6. The environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: The gap between the cable core (1) and the wire core (2) is filled with epoxy resin (7).

7. The environmentally friendly, corrosion-resistant, medium-voltage, cross-linked, flexible, fire-resistant cable according to claim 1, characterized in that: Wear-resistant particles (6) are evenly dispersed on the outer wall of the outer sheath (5).

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