CN217444117U

CN217444117U - Tear-resistant shielding flexible cable

Info

Publication number: CN217444117U
Application number: CN202220295520.XU
Authority: CN
Inventors: 屠渭江; 王成旺; 李清华; 吴英俊; 王礼国
Original assignee: Zhejiang Products Zhongda Cable Co ltd
Current assignee: Zhejiang Products Zhongda Cable Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-09-16
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a resistant shielding flexible cable that tears, including three power sinle silk, a control sinle silk and an earth connection core center around PFA resin core outside and with aramid fiber pack the core and strand jointly and constitute the cable core, PFA resin core pipe endotheca is equipped with AFRP and strengthens the core, the outside cladding of cable core has PET resin around the covering in proper order, butyronitrile polyvinyl chloride inner sheath layer, the copper line is around total shielding layer of package, AFRP strengthens around covering and butyronitrile polyvinyl chloride oversheath layer, power sinle silk includes power conductor and crosslinked polyethylene insulating layer, control sinle silk includes the inner conductor, crosslinked fluororubber insulating layer, the copper line is around covering branch shielding layer and ETFE resin around the covering, the earth connection core includes ground conductor and fluororesin insulating layer. The flexible cable has excellent flexibility and tensile resistance, avoids core breaking and wire breaking of the conductor and the shielding layer, and has tear resistance and better durability under the low-temperature working condition.

Description

Tear-resistant shielding flexible cable

Technical Field

The application relates to the technical field of cables, in particular to a tear-resistant shielding flexible cable.

Background

In the industries of electric power, machinery, ports and the like, under the working conditions with special requirements of movement and the like, the flexible cable with good cold resistance, tensile resistance and flexibility is required to be applied to the mobile electric appliance instrument connecting wire or signal transmission with the alternating current rated voltage of 450/750V and below, however, the common multi-core flexible cable has poor tensile resistance, after repeated bending, the metal shielding layer is easy to loosen, the shielding density is reduced, the shielding effect is unstable, the electrical characteristics are influenced, in addition, the flexibility is low under the low-temperature working environment, the skin is easy to crack, the tear resistance is poor, and the flexible cable is not durable in use.

SUMMERY OF THE UTILITY MODEL

This application is not enough to prior art, and the technical problem that solve provides a resistant shielding flexible cable that tears, optimizes the cable core structure, has excellent pliability and stretch-proofing performance, avoids conductor and shielding layer disconnected core disconnection to take place, and under the low temperature operating mode, the crust sheath is tear-resistant, and durable use is better.

The present application solves the above-mentioned problems by the following technical solutions.

The tearing-resistant shielding flexible cable comprises three power wire cores, a control wire core and a grounding wire core which surround the PFA resin core pipe and are twisted with the aramid fiber filling core material together to form a cable core, an AFRP reinforced core material is sleeved in the PFA resin core pipe and is formed by hot-melting and bonding a plurality of aramid fiber bundles and a thermoplastic polypropylene resin core material into a whole, the cable core is sequentially coated with a PET resin wrapping layer, a butyronitrile polyvinyl chloride inner sheath layer, a copper wire wrapping total shielding layer, an AFRP reinforced wrapping layer and a butyronitrile polyvinyl chloride outer sheath layer outside, the power sinle silk includes power conductor and crosslinked polyethylene insulating layer, the control sinle silk includes the inner conductor and coats in proper order the outside crosslinked fluororubber insulating layer of inner conductor, copper line are around package branch shielding layer and ETFE resin around the covering, the earth connection core includes ground conductor and fluororesin insulating layer.

Preferably, the power conductor is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.05mm to 0.08 mm.

Preferably, the lay length of the cable core is 8 to 15 times of the outer diameter of the power wire core.

Preferably, the inner conductor is formed by twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fiber bundles together, and the wire diameter of the tin-plated copper monofilaments is 0.01mm to 0.04 mm.

Preferably, the AFRP reinforced wrapping layer is of a double-layer aramid fiber strand woven structure with reverse spiral winding and different spiral angles, and the diameter of the aramid fiber strand is 0.22mm to 0.36 mm.

Preferably, the copper wire lapping total shielding layer is formed by mixing and spirally winding two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, the wire diameter of each tinned copper wire is 0.04-0.12 mm, and the shielding density is 85-95%.

Preferably, the PET resin is around covering for PET resin tape clearance around the package structure and the winding distance is 2 to 4 times of bandwidth.

Preferably, the power core and the control core have an outer diameter ratio of 1:1 to 1:1.05, and the ground core and the control core have an outer diameter ratio of 0.95:1 to 1.05: 1.

Preferably, the outer diameter of the grounding wire core is 3.2mm to 4.8 mm.

Preferably, the thickness of the copper wire lapping total shielding layer is not less than 0.3 mm.

The beneficial effect of this application:

1. the outer diameter ratio among the control wire core, the power wire core and the grounding wire core is optimized, so that the cable core structure is balanced and is in a circular section, and the circular section is jointly stranded with the PFA resin core pipe and the aramid fiber filling core material, the AFRP reinforced core material is arranged in the PFA resin core pipe, the AFRP reinforced core material has high strength and large tensile elastic modulus, the tensile resistance of the whole cable core is favorably improved, the aramid fiber filling core material is favorable for the cable core to bear the lateral pressure during bending, the force can be relieved to a certain extent to the load stress applied to the cable core from the outside, the local stress concentration of the wire core is reduced, the flexibility and the bending resistance of the cable core are improved, the occurrence of broken core and broken wire is prevented, the safe and reliable electrical characteristics of the cable are ensured, and the cable is durable in use.

2. The butyronitrile polyvinyl chloride inner and outer sheath layers which are tear-resistant, cold-resistant, wear-resistant and tensile are adopted outside the cable, so that under the working condition of low temperature, the high mechanical stress is resisted, the tear-resistant and wear-resistant performances are excellent, the cable sheath is effectively prevented from cracking, and the durability and the usability are better.

3. Through set up the copper line between butyronitrile polyvinyl chloride inner sheath layer and butyronitrile polyvinyl chloride oversheath layer around the total shielding layer of package, AFRP reinforces around the covering, the copper line helps keeping the pliability of cable around the structural feature on the total shielding layer of package, can effectually restrain inside signal or noise leakage to the outside and restrain the interference that comes from the external signal, AFRP reinforces around the covering and can improve tensile strength, help reducing the copper line around the total shielding layer local stress concentration of package, avoid appearing the broken string problem, guarantee the stability of shielding effect, help the cable still to keep good elasticity and bending resistance under the low temperature operating mode condition.

Drawings

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

Description of reference numerals:

the cable comprises a power wire core, a control wire core, a grounding wire core, a 4-PFA resin core pipe, a 5-aramid fiber filled core material, a 6-AFRP reinforced core material, a 7-PET resin wrapping layer, an 8-butyronitrile polyvinyl chloride inner sheath layer, a 9-copper wire wrapping total shielding layer, a 10-AFRP reinforced wrapping layer, an 11-butyronitrile polyvinyl chloride outer sheath layer, a 12-power conductor, a 13-crosslinked polyethylene insulating layer, a 14-inner conductor, a 15-crosslinked fluororubber insulating layer, a 16-copper wire wrapping partial shielding layer, a 17-ETFE resin wrapping layer, an 18-grounding conductor and a 19-fluororesin insulating layer.

Detailed Description

The terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the application, as the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the tear-resistant shielded flexible cable according to the embodiment of the present application includes three power cores 1, a control core 2 and a ground core 3, which surround a PFA resin core tube 4 and are twisted together with an aramid fiber-filled core material 5 to form a cable core, and specifically, the lay length of the cable core is 8 to 15 times of the outer diameter of the power cores 1. The power wire core 1 and the control wire core 2 have an outer diameter ratio of 1:1 to 1:1.05, and the ground wire core 3 and the control wire core 2 have an outer diameter ratio of 0.95:1 to 1.05: 1. The outer diameter of the grounding wire core 3 is 3.2mm to 4.8 mm. An AFRP reinforced core material 6 is sleeved in the PFA resin core tube 4, and the AFRP reinforced core material 6 is formed by hot-melting and bonding a plurality of aramid fiber bundles and a thermoplastic polypropylene resin core material into a whole.

The power cable core 1 comprises a power conductor 12 and a crosslinked polyethylene insulating layer 13, specifically, the power conductor 12 is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.05 mm-0.08 mm. The control sinle silk 2 includes inner conductor 14 and cladding in proper order the outside crosslinked fluororubber insulating layer 15 of inner conductor 14, copper line are around covering branch shielding layer 16 and ETFE resin around covering 17, and specific theory, inner conductor 14 is that a plurality of tin-plated copper monofilament and a plurality of counterpoint type wholly aromatic copolyamide draw-out fiber bundle twist together and constitute, tin-plated copper monofilament line footpath is 0.01mm to 0.04 mm. The ground core 3 includes a ground conductor 18 and a fluororesin insulating layer 19.

The cable core outside cladding has PET resin in proper order around covering 7, butyronitrile polyvinyl chloride inner sheath layer 8, copper line around covering total shielding layer 9, AFRP reinforces around covering 10 and butyronitrile polyvinyl chloride oversheath layer 11. In one embodiment, the PET resin wrapping layer 7 is a PET resin tape gap wrapping structure and the wrapping distance is 2 to 4 times of the tape width. In one embodiment, the copper wire is formed by mixing and spirally winding tinned copper wires with two different wire diameters and a wire diameter ratio of 0.9 to 1 around the total shielding layer 9, the wire diameter of the tinned copper wire is 0.04mm to 0.12mm, the shielding density is 85% to 95%, and further, the thickness of the copper wire around the total shielding layer 9 is not less than 0.3 mm. In one embodiment, the AFRP reinforced wrapping layer 10 is formed by double layers of aramid fiber strands which are in reverse spiral winding weaving structure and have different spiral angles, and the diameter of the aramid fiber strands is 0.22mm to 0.36 mm.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the technical solutions, and the scope of the present application is not limited to the above-mentioned embodiments, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application and are intended to be covered by the appended claims.

Claims

1. Tear-resistant shielding flexible cable, characterized by: pack core (5) transposition jointly around PFA resin core pipe (4) outside and with aramid fiber and constitute the cable core including three power sinle silk (1), a control sinle silk (2) and a earthing core (3), PFA resin core pipe (4) endotheca is equipped with AFRP and strengthens core (6), AFRP strengthens core (6) and is a plurality of aramid fiber bundles and thermoplasticity polypropylene resin core hot melt bonding one-tenth, the cable core outside cladding in proper order has PET resin around covering (7), butyronitrile polyvinyl chloride inner sheath layer (8), copper line around covering total shielding layer (9), AFRP strengthens around covering (10) and butyronitrile polyvinyl chloride outer sheath layer (11), power sinle silk (1) is including power conductor (12) and crosslinked polyethylene insulating layer (13), control sinle silk (2) include inner conductor (14) and in proper order the cladding be in outer crosslinked fluororubber insulating layer (15) of inner conductor (14), Copper line is around covering branch shielding layer (16) and ETFE resin around covering (17), ground core (3) include ground conductor (18) and fluororesin insulating layer (19).

2. The tear-resistant shielded flexible cable of claim 1, wherein: the power conductor (12) is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.05 mm-0.08 mm.

3. The tear resistant shielded flexible cable of claim 1, wherein: the cable core lay length is 8-15 times of the outer diameter of the power cable core (1).

4. The tear-resistant shielded flexible cable of claim 1, wherein: the inner conductor (14) is formed by co-twisting a plurality of tinned copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fiber bundles, and the wire diameter of the tinned copper monofilaments is 0.01-0.04 mm.

5. The tear resistant shielded flexible cable of claim 1, wherein: AFRP strengthens for double-deck aramid fiber strand each other for reverse spiral winding braid structure and spiral angle different around covering (10), aramid fiber strand wire footpath is 0.22mm to 0.36 mm.

6. The tear resistant shielded flexible cable of claim 1, wherein: the copper wire lapping total shielding layer (9) is formed by mixing and spirally winding two tinned copper wires with different wire diameters and a wire diameter ratio of 0.9-1, wherein the wire diameter of each tinned copper wire is 0.04-0.12 mm, and the shielding density is 85-95%.

7. The tear resistant shielded flexible cable of claim 1, wherein: PET resin is for PET resin tape gap to wind the package structure and wind 2 to 4 times that apart from being the bandwidth around covering (7).

8. The tear resistant shielded flexible cable of claim 1, wherein: the power wire core (1) and the control wire core (2) have an outer diameter ratio of 1:1 to 1:1.05, and the ground wire core (3) and the control wire core (2) have an outer diameter ratio of 0.95:1 to 1.05: 1.

9. The tear resistant shielded flexible cable of claim 1, wherein: the outer diameter of the grounding wire core (3) is 3.2mm to 4.8 mm.

10. The tear resistant shielded flexible cable of claim 1, wherein: the thickness of the copper wire lapping total shielding layer (9) is not less than 0.3 mm.