CN219497367U

CN219497367U - Elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable

Info

Publication number: CN219497367U
Application number: CN202320242086.3U
Authority: CN
Inventors: 屠渭江; 蔡长威; 刘书鑫; 李清华; 吴英俊; 王礼国
Original assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-08-08
Anticipated expiration: 2033-02-17

Abstract

The utility model discloses an elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable which comprises a cable core formed by twisting five insulating wire cores around a cross-linked fluororubber central elastomer, wherein the cable core is sequentially coated with a high-temperature fireproof belt wrapping layer, an aramid fiber twisting layer, a nylon belt wrapping layer and a tetrafluoroethylene propylene copolymer fluororubber sheath, the insulating wire cores comprise aluminum alloy conductors, high Wen Bo fiber belt wrapping layers, a foamed polyethylene insulating layer, an EVA bonding layer and a polyethylene extrusion insulating layer, the foamed polyethylene insulating layer is a foamed polyethylene resin layer with the foaming rate of 5-45% and the thickness of 0.9-3 mm, the thickness of the polyethylene extrusion insulating layer is 0.5-2 mm, and the thickness of the tetrafluoroethylene propylene copolymer fluororubber sheath is 1.5-2 mm. The cable has high elastic recovery capability, reduces the broken wire and broken core conditions caused by bending extrusion, has excellent fireproof performance and reduces potential safety hazards.

Description

Elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable

Technical Field

The application belongs to the technical field of cables, and particularly relates to an elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable.

Background

In recent years, the domestic economy continues to grow rapidly, and huge market space is provided for the power cable industry. The development of the whole industry also has the conditions of low concentration, dispersed technical force and the like. Along with the improvement of fireproof requirements, the requirements of various industries on cable products are developed towards high performance and high quality, fireproof cables are increasingly adopted, different process technical requirements are provided for the design of the fireproof cables from those of common cables, and more reliable fireproof functions are required to ensure the safety performance. In addition, in the laying process of the common cable, the common cable is difficult to recover by means of elasticity after being bent, the deformation caused by bending extrusion is easy to generate the condition of broken wires and broken cores, the electrical performance is unstable, and hidden danger is brought to the safe operation of the power system.

Disclosure of Invention

The utility model provides a to the not enough of prior art, the technical problem that solves provides an elasticity recovery formula anti-bending 5 core low pressure fire prevention aluminum alloy cable, possesses high elasticity resilience, reduces the broken string broken core condition that crooked extrusion caused, guarantees stable electrical property, and fire behavior is excellent, improves the fail safe nature of fire prevention cable, reduces the potential safety hazard.

The technical problems are solved by the following technical scheme.

The utility model provides an anti crooked 5 core low pressure fire prevention aluminum alloy cable of elastic recovery type, includes five insulating sinle silk and surrounds a crosslinked fluororubber central elastomer and twist together and constitute the cable core, the outside cladding of cable core has high temperature fire prevention area around covering, aramid fiber twine winding layer, nylon tape around covering and tetrafluoroethylene propylene copolymer fluororubber sheath in proper order, insulating sinle silk includes aluminum alloy conductor and cladding in proper order the outside high Wen Bo fiber band around covering of aluminum alloy conductor, foamed polyethylene insulating layer, EVA adhesive linkage and the extruded insulating layer of polyethylene, aluminum alloy conductor external diameter is 0.5mm to 10mm, foamed polyethylene insulating layer is foamed polyethylene resin layer of foaming rate 5% to 45% and thickness is 0.9mm to 3mm, the extruded insulating layer thickness of polyethylene is 0.5mm to 2mm, high temperature glass fiber area is 0.05mm to 0.5mm around covering thickness, tetrafluoroethylene propylene copolymer fluororubber sheath thickness is 1.5mm to 2mm.

Preferably, the cross-linked fluororubber central elastomer comprises an inner cylinder body and an outer cylinder body, and a plurality of connecting plate bodies are radially and uniformly distributed between the inner cylinder body and the outer cylinder body.

Preferably, the aluminum alloy conductor is formed by concentrically twisting a plurality of aluminum alloy wires with diameters of 0.05mm to 0.3 mm.

Preferably, the aluminum alloy wire is twisted in the opposite direction to the insulated wire core.

Preferably, the high-temperature fireproof belt wrapping layer is a one-way lapping wrapping structure of the high-temperature fireproof belt, and the high-temperature fireproof belt is of a three-layer sandwich bonding integrated structure of an inner cladding layer and an outer cladding layer of crosslinked polyethylene resin and a mica tape interlayer.

Preferably, the aramid yarn twisting winding layer is of an aramid yarn twisting unidirectional spiral winding structure, and the spiral direction of the aramid yarn twisting layer is the same as the winding direction of the high-temperature fireproof belt winding layer.

Preferably, the aramid twisted wire has a wire diameter of 0.15mm to 0.36mm and a winding distance of 3mm to 5mm.

Preferably, the high-temperature glass fiber tape wrapping layer is a high Wen Bo fiber tape one-way lapping wrapping structure.

Preferably, the cable core lay length is 10 to 20 times of the outer diameter of the insulated wire core.

Preferably, the nylon tape wrapping layer has a thickness of 0.3mm to 0.5mm.

The beneficial effects of this application:

1. the five insulating wire cores and the cross-linked fluororubber central elastomer are twisted, the cross-linked fluororubber insulator with the cylindrical structure is favorable for bearing lateral pressure during bending, the lateral pressure and extrusion force of each insulating wire core during bending are slowed down, the bending resistance is improved, the stress concentration in the cable core is relieved, the occurrence of the condition that the insulating wire cores are broken is reduced, and the stable electrical characteristics of the cable are ensured. In addition, after the cable is subjected to bending extrusion in the laying process, the cable can be quickly and elastically restored to the original state, so that each insulated wire core is restored to the original state, the occurrence of wire breakage and core breakage caused by deformation caused by bending extrusion is avoided, the reliability of the cable is improved, and the durability is better.

2. The high Wen Bo fiber tape is wound on the cladding layer to effectively prevent fire and isolate the aluminum alloy conductor from the foamed polyethylene insulating layer, so that the fire resistance of the cable is improved, the safety and reliability are enhanced, the structural design of each layer of the cable is optimized, the thickness of each layer of the cable is reduced on the basis of ensuring the high temperature resistance and heat insulation and insulation characteristics, the cost is reduced, and the diameter-reducing preparation is realized.

3. The foamed polyethylene insulating layer is a foamed polyethylene resin layer with a foaming rate of 5-45%, is beneficial to improving the mechanical strength of the insulating layer, has a foaming rate of less than 5% and poor processing manufacturability, and has a foaming rate of more than 45% and has low strength, so that cracks are easy to generate.

4. The insulating layer adopts foamed polyethylene insulating layer and the extruded insulating layer of polyethylene to bond through EVA adhesive linkage and form an organic wholely, each other is the reinforcement structural layer, and the tensile strength and the elongation of the extruded insulating layer of polyethylene are greater than the foamed polyethylene insulating layer, experience crooked difficult emergence tearing phenomenon, can form effectual protection to inside insulating layer, are favorable to the laying installation of cable, and the durability is better.

Drawings

Fig. 1 is a schematic cross-sectional structure of an embodiment of the present application.

Reference numerals illustrate:

the cable comprises a 1-insulated cable core, a 2-crosslinked fluororubber central elastomer, a 3-high temperature fireproof belt wrapping layer, a 4-aramid twisted winding layer, a 5-nylon belt wrapping layer, a 6-tetrafluoroethylene propylene copolymer fluororubber sheath, a 7-aluminum alloy conductor, an 8-high temperature glass fiber belt wrapping layer, a 9-foamed polyethylene insulating layer, a 10-EVA bonding layer and an 11-polyethylene extrusion insulating layer.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1, an elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable in the embodiment of the application comprises five insulating wire cores 1 which are stranded together around a cross-linked fluororubber central elastomer 2 to form a cable core, specifically speaking, the cross-linked fluororubber central elastomer 2 comprises an inner cylinder body and an outer cylinder body, and a plurality of connecting plate bodies are radially and uniformly distributed between the inner cylinder body and the outer cylinder body. The cable core lay length is 10 to 20 times of the outer diameter of the insulated wire core 1. The insulated wire core 1 comprises an aluminum alloy conductor 7, wherein the outer diameter of the aluminum alloy conductor 7 is 0.5mm to 10mm, specifically, the aluminum alloy conductor 7 is formed by concentrically twisting a plurality of aluminum alloy wires with diameters of 0.05mm to 0.3mm, and further, the twisting direction of the aluminum alloy wires is opposite to that of the insulated wire core 1. The aluminum alloy conductor 7 is sequentially coated with a high-temperature glass fiber band wrapping layer 8, a foaming polyethylene insulating layer 9, an EVA bonding layer 10 and a polyethylene extrusion insulating layer 11, and further, the high-temperature glass fiber band wrapping layer 8 is of a high Wen Bo fiber band one-way lapping wrapping structure. The foamed polyethylene insulating layer 9 is a foamed polyethylene resin layer with a foaming rate of 5-45% and a thickness of 0.9-3 mm, the thickness of the polyethylene extrusion insulating layer 11 is 0.5-2 mm, and the thickness of the high-temperature glass fiber tape wrapping layer 8 is 0.05-0.5 mm.

The cable core is sequentially coated with a high-temperature fireproof belt wrapping layer 3, an aramid fiber twisting winding layer 4, a nylon belt wrapping layer 5 and a tetrafluoroethylene propylene copolymer fluororubber sheath 6, wherein the thickness of the nylon belt wrapping layer 5 is 0.3mm to 0.5mm, and the thickness of the tetrafluoroethylene propylene copolymer fluororubber sheath 6 is 1.5mm to 2mm. In one embodiment, the high-temperature fireproof belt wrapping layer 3 is of a high-temperature fireproof belt one-way lapping wrapping structure, and the high-temperature fireproof belt is of a three-layer sandwich bonding integrated structure of a crosslinked polyethylene resin inner and outer wrapping layer and a mica tape interlayer. In one embodiment, the aramid yarn twisting winding layer 4 is an aramid yarn twisting unidirectional spiral winding structure, the spiral direction of the aramid yarn twisting is the same as the winding direction of the high-temperature fireproof belt winding layer 3, and further, the yarn diameter of the aramid yarn twisting is 0.15mm to 0.36mm and the winding distance is 3mm to 5mm.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. Elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable is characterized in that: the cable comprises five insulating wire cores (1) which are twisted together around a cross-linked fluororubber central elastomer (2) to form a cable core, wherein the cable core is sequentially coated with a high-temperature fireproof tape wrapping layer (3), an aramid fiber twisting winding layer (4), a nylon tape wrapping layer (5) and a tetrafluoroethylene propylene copolymer fluororubber sheath (6), the insulating wire cores (1) comprise aluminum alloy conductors (7) and a high Wen Bo fiber tape wrapping layer (8), a foamed polyethylene insulating layer (9), an EVA adhesive layer (10) and a polyethylene extrusion insulating layer (11) which are sequentially coated on the outer sides of the aluminum alloy conductors (7), the outer diameter of the foamed polyethylene insulating layer (9) is 0.5-10 mm, the foaming rate is 5-45% of a foamed polyethylene resin layer, the thickness of the foamed polyethylene extrusion insulating layer (11) is 0.5-2 mm, the thickness of the high-temperature glass tape wrapping layer (8) is 0.05-0.5 mm, and the thickness of the tetrafluoroethylene propylene copolymer fluororubber sheath (6-2.5 mm).

2. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the cross-linked fluororubber central elastomer (2) comprises an inner cylinder body and an outer cylinder body, and a plurality of connecting plate bodies are radially and uniformly distributed between the inner cylinder body and the outer cylinder body.

3. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the aluminum alloy conductor (7) is formed by concentrically twisting a plurality of aluminum alloy wires with diameters of 0.05mm to 0.3 mm.

4. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 3, wherein the cable is characterized in that: the aluminum alloy wires are twisted in the opposite direction to the insulated wire cores (1).

5. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the high-temperature fireproof belt wrapping layer (3) is of a one-way lapping wrapping structure of the high-temperature fireproof belt, and the high-temperature fireproof belt is of a three-layer sandwich bonding integrated structure of an inner cladding layer and a cross-linked polyethylene resin and a mica tape interlayer.

6. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the aramid fiber twisted wire winding layer (4) is of an aramid fiber twisted wire unidirectional spiral winding structure, and the spiral direction of the aramid fiber twisted wire is the same as the winding direction of the high-temperature fireproof belt winding layer (3).

7. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 6, wherein the cable is characterized in that: the aramid yarn is 0.15mm to 0.36mm in wire diameter and 3mm to 5mm in winding distance.

8. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the high-temperature glass fiber tape wrapping layer (8) is of a high Wen Bo fiber tape one-way lapping wrapping structure.

9. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the cable core lay length is 10 to 20 times of the outer diameter of the insulated wire core (1).

10. The elastic recovery type bending-resistant 5-core low-voltage fireproof aluminum alloy cable according to claim 1, wherein the cable is characterized in that: the thickness of the nylon tape wrapping layer (5) is 0.3mm to 0.5mm.