Low-temperature-resistant environment-friendly flame-retardant cable

Abstract

The utility model discloses a low temperature resistant environment-friendly flame-retardant cable, which relates to the technical field of cables, and comprises a cable core, four groups of annularly distributed wire cores are arranged in the cable core, each wire core is composed of a conductor, an inner insulating film and an insulating coating, a thermal insulation layer is arranged outside the cable core, and the insulating coating is arranged outside the thermal insulation layer. The heat preservation layer is composed of a base material layer, an enhancement layer and a low-smoke halogen-free flame-retardant layer, a strengthening layer is arranged outside the heat preservation layer and composed of a base layer and a functional layer, a low-temperature-resistant outer sheath layer is arranged outside the strengthening layer and composed of a base material layer, a low-temperature-resistant modified layer, an environment-friendly flame-retardant layer and a wear-resistant layer, and the low-temperature-resistant outer sheath layer is arranged outside the strengthening layer and composed of a base material layer, a low-temperature-resistant modified layer, an environment-friendly flame-retardant layer and a wear-resistant layer. According to the scheme, the problem that a flame-retardant cable is poor in stability in an extremely low-temperature environment is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a kind of anti-low temperature environmental protection flame-retardant cable. BACKGROUND

[0002] Flame-retardant cable is a kind of special cable with excellent fireproof performance, it uses special material and structure design, can effectively prevent the spread of fire when fire occurs. This cable not only has the transmission function of ordinary cable, but also can be self-extinguished when encountering open flame, without producing dripping, greatly reducing the risk of fire spread. The outer sheath of flame-retardant cable is usually made of high-temperature-resistant and flame-retardant material, which can resist high-temperature burning and protect the internal circuit from damage.

[0003] For example, the Chinese authorized patent "Flame-retardant cable" with announcement number CN209561058U includes wrapping tape, conductor, insulation layer, filling layer, flame-retardant layer, braided shielding layer and outer sheath, four conductors are uniformly inserted in the wrapping tape, the conductor outer wall is wrapped with insulation layer, the insulation layer is filled with filling layer between the wrapping tape, the flame-retardant layer outer wall is sleeved with braided shielding layer, carbon fiber filaments are uniformly inserted in the braided shielding layer, and the braided shielding layer outer wall is sleeved with outer sheath, this kind of flame-retardant cable increases the strength of outer sheath by increasing braided shielding layer inside outer sheath.

[0004] Although the above-mentioned prior art increases the strength of outer sheath by increasing braided shielding layer inside outer sheath, and realizes basic flame-retardant function, it has deficiencies in low-temperature resistance, environmental protection material application, multi-layer composite heat preservation and strengthening protection, and the cable performance stability in extreme low-temperature environment is not fully considered, and there is lack of special material design and modification for low-temperature environment, so it does not meet the existing demand, and therefore we propose a kind of anti-low temperature environmental protection flame-retardant cable. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of anti-low temperature environmental protection flame-retardant cable to solve the poor stability of flame-retardant cable in extreme low-temperature environment as described in the above background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an anti-low temperature environmental protection flame-retardant cable, comprising a cable core, four groups of annularly distributed wire cores are arranged inside the cable core, the wire core is composed of a conductor, an inner insulation film and an insulation coating, a heat preservation layer is arranged outside the cable core, the heat preservation layer is composed of a first base material layer, a reinforcing layer, a low-smoke halogen-free flame-retardant layer and an environmental protection layer, a reinforcing layer is arranged outside the heat preservation layer, the reinforcing layer is composed of a base layer and a functional layer, an anti-low temperature outer sheath layer is arranged outside the reinforcing layer, the anti-low temperature outer sheath layer is composed of a second base material layer, an anti-low temperature modification layer, an environmental protection flame-retardant layer and a wear-resistant layer.

[0007] Preferably, the conductor is twisted by multiple thin copper wires, the inner insulation film is wrapped outside the conductor, and the insulation coating is sprayed outside the inner insulation film.

[0008] Preferably, the first substrate layer is fixed outside the cable core through an adhesive, the reinforcing layer is spirally wound outside the first substrate layer, the low-smoke halogen-free flame-retardant layer is fixed outside the reinforcing layer through an adhesive, and the environment-friendly layer is wrapped outside the low-smoke halogen-free flame-retardant layer.

[0009] Preferably, the two surfaces of the base layer are provided with adhesive layers, respectively adhered and fixed with the thermal insulation layer and the functional layer.

[0010] Preferably, the second substrate layer is extruded outside the reinforcing layer, the low-temperature-resistant modified layer is extruded on the outer wall of the second substrate layer, the environment-friendly flame-retardant layer is fixed on the outer wall of the low-temperature-resistant modified layer through an adhesive, and the wear-resistant layer is extruded outside the environment-friendly flame-retardant layer.

[0011] Preferably, a reinforcing core is arranged between adjacent cable cores.

[0012] Preferably, a filling layer is arranged at the gap between the cable core and the reinforcing core, and the filling layer is epoxy resin.

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

[0014] 1. The cable outer sheath layer can maintain stable physical properties and mechanical strength in an extremely low-temperature environment, ensuring normal use of the cable, the substrate layer adopts polyethylene, the overall mechanical strength and wear resistance of the outer sheath layer are improved in combination with the low-temperature-resistant modified layer, the service life of the cable is prolonged, the outer sheath layer forms an efficient and stable protective barrier through the compounding of multiple functional materials, the overall stability and reliability of the cable are improved, the environment-friendly flame-retardant layer adopts low-smoke halogen-free flame-retardant material or inorganic flame retardant, meets environmental protection requirements, and can effectively prevent flame from spreading when burning, protecting personal and property safety.

[0015] 2. The composite reinforcing layer is composed of high-strength and wear-resistant material, can effectively resist external damage and wear, protects the cable core and the thermal insulation layer from damage, the reinforcing layer material has good wear resistance and tear resistance, can prolong the service life of the cable, reduce failures caused by wear or tearing, the addition of the ultraviolet-resistant additive layer improves the weather resistance of the reinforcing material, makes it resist ultraviolet radiation and aging, maintains long-term performance stability, the setting of the adhesive layer ensures firm adhesion between the reinforcing layer and the thermal insulation layer, improves the stability of the overall structure, and prevents performance degradation caused by interlayer separation.

[0016] 3、The composite thermal insulation layer is composed of various high-efficiency thermal insulation materials, provides excellent thermal insulation performance, can effectively reduce heat loss, improve the energy efficiency of the cable, and the addition of the reinforcing layer improves the mechanical strength and durability of the thermal insulation layer, so that it can withstand greater external force and environmental changes, prolongs the service life of the cable, and the setting of the flame-retardant layer can effectively prevent the spread of flames in emergency situations such as fire, and protects personal and property safety, the thermal insulation material uses environmentally friendly materials and environmentally friendly additives, reduces the impact on the environment, meets modern environmental protection requirements, and can adapt to various extreme environments and complex application occasions, such as low temperature, humidity, dust, etc., providing all-round protection for the cable. 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 thermal insulation layer structure of the utility model;

[0020] Figure 4 It is a schematic view of the reinforcing layer structure of the utility model;

[0021] Figure 5 It is a schematic view of the low-temperature-resistant outer sheath layer structure of the utility model.

[0022] In the drawing: 1, cable core; 2, wire core; 21, conductor; 22, inner insulating film; 23, insulating coating; 3, thermal insulation layer; 31, first base material layer; 32, reinforcing layer; 33, low-smoke halogen-free flame-retardant layer; 34, environmentally friendly layer; 4, reinforcing layer; 41, base layer; 42, functional layer; 43, adhesive layer; 5, low-temperature-resistant outer sheath layer; 51, second base material layer; 52, low-temperature-resistant modified layer; 53, environmentally friendly flame-retardant layer; 54, wear-resistant layer; 6, reinforcing core; 7, filling layer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all.

[0024] Please refer to Figures 1-5The utility model provides an embodiment: a kind of low-temperature-resistant environmental protection flame-retardant cable, including cable core 1, the inside of cable core 1 is equipped with four groups of annular distribution's wire core 2, wire core 2 is composed of conductor 21, inner insulating film 22 and insulating coating 23, conductor 21 is twisted by multiple thin copper wires, inner insulating film 22 is wrapped in the outside of conductor 21, insulating coating 23 is sprayed in the outside of inner insulating film 22, strengthening core 6 is provided between adjacent wire core 2, and filling layer 7 is equipped in the gap of wire core 2 and strengthening core 6, and filling layer 7 is epoxy resin, conductor 21 is twisted by multiple thin copper wires, to increase the flexibility and current-carrying capacity of conductor;Inner insulating film 22 is polyimide, with excellent high and low temperature resistance, electrical insulation and chemical stability;Insulating coating 23 is low-temperature-resistant, corrosion-resistant polymer coating, maintains stable electrical properties and mechanical properties in extreme low temperature environment, ensures the reliability of power transmission;

[0025] The wire core uses copper as the conductor, ensuring efficient current conduction of the cable, reducing power loss, and the multiple twisted conductor design increases the flexibility of the cable, facilitating installation and bending, adapting to various complex environments. The use of low-temperature-resistant conductor materials and coating materials ensures the cable's stable electrical properties and mechanical properties in extreme low-temperature environments, ensuring the reliability of power transmission. The insulating coating provides additional corrosion protection, extending the service life of the cable.

[0026] Please refer to Figure 1 、 Figure 2 and Figure 3 , the outside of cable core 1 is provided with a thermal insulation layer 3, which is composed of a first base material layer 31, a reinforcing layer 32, a low-smoke halogen-free flame-retardant layer 33 and an environmental protection layer 34. The first base material layer 31 is fixed to the outside of the cable core 1 by adhesive. The reinforcing layer 32 is spirally wound outside the first base material layer 31. The low-smoke halogen-free flame-retardant layer 33 is fixed to the outside of the reinforcing layer 32 by adhesive. The environmental protection layer 34 is coated on the outside of the low-smoke halogen-free flame-retardant layer 33. The first base material layer 31 is polyurethane foam, which has excellent thermal insulation performance and water resistance, high strength, strong durability and long service life. At the same time, the polyurethane foam also has good low-temperature performance, which can maintain stable thermal insulation effect in extreme low-temperature environment. The reinforcing layer 32 is glass fiber cloth, which is used to enhance the mechanical strength and durability of the thermal insulation layer. The low-smoke halogen-free flame-retardant layer 33 has good flame-retardant performance, which can effectively prevent the spread of fire during combustion. The environmental protection layer 34 is polylactic acid, which can be naturally degraded after the end of service life, meeting environmental protection requirements.

[0027] Please refer to Figure 1 、 Figure 2 and Figure 4The outer part of the thermal insulation layer 3 is provided with a reinforcing layer 4, the reinforcing layer 4 is composed of a base layer 41 and a functional layer 42, the two surfaces of the base layer 41 are provided with adhesive layers 43, which are adhered and fixed with the thermal insulation layer 3 and the functional layer 42 respectively, the base layer 41 is glass fiber reinforced plastic, taking glass fiber as the reinforcing material and plastic as the matrix, which has the advantages of light weight, high strength, corrosion resistance and the like, and is suitable for providing additional mechanical protection; the adhesive layer 43 is pressure sensitive adhesive, which firmly adheres the reinforcing layer with the thermal insulation layer or other outer layer, ensuring the stability of the overall structure; the functional layer 42 is polyethylene, which has good wear resistance and tear resistance, and at the same time has a certain flexibility, and an ultraviolet resistant additive is added in the polyethylene to improve the weather resistance of the material.

[0028] Please refer to Figure 1 , Figure 2 and Figure 5 , the outer part of the reinforcing layer 4 is provided with an anti-low-temperature outer sheath layer 5, the anti-low-temperature outer sheath layer 5 is composed of a second base material layer 51, an anti-low-temperature modification layer 52, an environmentally friendly flame-retardant layer 53 and a wear-resistant layer 54, the second base material layer 51 is extruded on the outer part of the reinforcing layer 4, the anti-low-temperature modification layer 52 is extruded on the outer wall of the second base material layer 51, the environmentally friendly flame-retardant layer 53 is fixed on the outer wall of the anti-low-temperature modification layer 52 by adhesive, and the wear-resistant layer 54 is extruded on the outer part of the environmentally friendly flame-retardant layer 53, the second base material layer 51 is polyethylene, which provides main physical protection and mechanical strength; the anti-low-temperature modification layer 52 is special modified polyethylene, which has better anti-low-temperature performance and mechanical strength through blending modification technology; the environmentally friendly flame-retardant layer 53 is inorganic flame retardant, which is covered on the anti-low-temperature modification layer to provide double protection of environmental protection and flame retardation; the wear-resistant layer 54 is thermoplastic elastomer, which provides additional wear resistance and weather resistance to adapt to more severe use environment.

[0029] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An environmentally friendly, low temperature resistant, flame retardant cable comprising a core (1), characterized in that: The inside of the cable core (1) is provided with four groups of annularly distributed wire cores (2), the wire core (2) is composed of a conductor (21), an inner insulation film (22) and an insulation coating (23), the outside of the cable core (1) is provided with a thermal insulation layer (3), the thermal insulation layer (3) is composed of a first base material layer (31), a reinforcing layer (32), a low-smoke halogen-free flame-retardant layer (33) and an environmental protection layer (34), the outside of the thermal insulation layer (3) is provided with a reinforcing layer (4), the reinforcing layer (4) is composed of a base layer (41) and a functional layer (42), the outside of the reinforcing layer (4) is provided with an anti-low-temperature outer sheath layer (5), the anti-low-temperature outer sheath layer (5) is composed of a second base material layer (51), an anti-low-temperature modification layer (52), an environmental protection flame-retardant layer (53) and a wear-resistant layer (54).

2. The low temperature resistant environment-friendly flame-retardant cable according to claim 1, characterized in that: The conductor (21) is twisted by multiple thin copper wires, the inner insulation film (22) is wrapped outside the conductor (21), and the insulation coating (23) is sprayed outside the inner insulation film (22).

3. The low temperature resistant environment-friendly flame-retardant cable according to claim 1, characterized in that: The first base material layer (31) is fixed outside the cable core (1) by an adhesive, the reinforcing layer (32) is spirally wound outside the first base material layer (31), the low-smoke halogen-free flame-retardant layer (33) is fixed outside the reinforcing layer (32) by an adhesive, and the environmental protection layer (34) is coated outside the low-smoke halogen-free flame-retardant layer (33).

4. The low-temperature resistant, environmentally friendly, flame-retardant cable according to claim 1, characterized in that: The base layer (41) is provided with an adhesive layer (43) on both sides and is adhesively fixed with the thermal insulation layer (3) and the functional layer (42).

5. The low temperature resistant environment-friendly flame-retardant cable according to claim 1, characterized in that: The second base material layer (51) is extruded outside the reinforcing layer (4), the anti-low-temperature modification layer (52) is extruded on the outer wall of the second base material layer (51), the environmental protection flame-retardant layer (53) is fixed on the outer wall of the anti-low-temperature modification layer (52) by glue, and the wear-resistant layer (54) is extruded outside the environmental protection flame-retardant layer (53).

6. The environmentally friendly low-temperature resistant and flame-retardant cable according to claim 1, characterized in that: The adjacent wire cores (2) are provided with a reinforcing core (6).

7. The low-temperature resistant, environmentally friendly, and flame-retardant cable according to claim 6, characterized in that: The gap between the wire core (2) and the reinforcing core (6) is provided with a filling layer (7), and the filling layer (7) is epoxy resin.

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