CN217444115U - Cold-resistant impact-resistant rubber jacketed flexible cable - Google Patents

Abstract

The utility model discloses a cold-resistant type rubber cover flexible cable that shocks resistance, constitute the cable core around a Y shape silicon rubber filler interval equipartition and jointly with the transposition of three earth connection core including three power sinle silk, the longitudinal hole has been seted up to Y shape silicon rubber filler, the control sinle silk is equipped with to the longitudinal hole endotheca, the outside cladding has the crowded package inner sheath layer of TPU in proper order of cable core, the antitorque interior covering of nylon wire, the copper line is around covering the shielding layer, antitorque outer covering and the crowded package outer sheath layer of TPU of nylon wire, power sinle silk includes power conductor, EPT rubber isolation layer and XLPE insulating layer, the earth connection core includes ground conductor and silicon rubber sheath, the control sinle silk includes that three insulation sinle silk jointly twists and constitutes the line core, the outer cladding fluororubber insulating layer of sinle silk body, insulation sinle silk includes inner conductor and silane grafting crosslinking low density polyethylene insulating layer. The cable has the advantages of impact resistance, severe cold resistance, good torsion resistance, stable shielding performance and better safety and reliability.

Description

Cold-resistant impact-resistant rubber jacketed flexible cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a cold-resistant type rubber cover flexible cable that shocks resistance.

Background

The rubber sheath flexible cable is suitable for coal mining machines and similar equipment with rated voltage of 1.9/3.3KV and below, has a power wire core, a control wire core and a grounding wire core, needs to bear certain mechanical pressure, and needs to keep flexibility while ensuring the tearing strength. However, in the working process of the common rubber-sheathed flexible cable, the bearing and running capacity is insufficient, the torsion resistance effect is poor, core breakage happens sometimes, and once the core breakage happens, the whole cable cannot be reused. Moreover, the common flexible cable is made of traditional insulating materials and meets severe cold, particularly in a severe environment of minus 40 ℃, an insulating sheath can be hardened and fragile, the electrical characteristics of the cable are influenced, the safety and reliability are poor, and potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a cold-resistant type rubber cover flexible cable that shocks resistance, resistant severe cold and good resistant torsional properties have, avoid breaking the line, shielding property is stable, and fail safe nature is better.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

Cold-resistant type rubber cover flexible cable that shocks resistance, including three power sinle silk around a Y shape silicon rubber filler core interval equipartition and constitute the cable core with three earth connection core transposition jointly, the longitudinal hole has been seted up to Y shape silicon rubber filler core, the longitudinal hole endotheca is equipped with the control sinle silk, the cable core outside cladding in proper order has TPU crowded package inner sheath layer, nylon wire antitorque in around the covering, copper line around covering shielding layer, nylon wire antitorque outer around covering and TPU crowded package outer sheath layer, the power sinle silk includes power conductor, EPT rubber isolation layer and XLPE insulating layer, the earth connection sinle silk includes ground conductor and silicon rubber sheath, the control sinle silk includes that three insulation core twists jointly and constitutes the line core, the outside cladding fluororubber insulating layer of line core, the insulation sinle silk includes inner conductor and silane grafting crosslinking low density polyethylene insulating layer.

Preferably, the copper wire lapping shielding layer is formed by mixing tinned copper wires with two different wire diameters and a wire diameter ratio of 0.9-1, the tinned copper wires are reversely and spirally wound, the wire diameter of the tinned copper wires is 0.24-0.35 mm, and the shielding density is 85-95%.

Preferably, the lay length of the cable core is 10 to 30 times of the outer diameter of the power wire core.

Preferably, the power conductor is formed by stranding a plurality of tinned copper wires, and the diameter of each tinned copper monofilament is 0.12mm to 0.36 mm.

Preferably, the silicone rubber sheath comprises an inner cylinder and an outer cylinder, a plurality of connecting ribs are radially and uniformly distributed between the inner cylinder and the outer cylinder, and the grounding conductor is sleeved on the inner cylinder.

Preferably, the grounding conductor is formed by twisting and pressing a plurality of soft copper wires to form a circular conductor structure.

Preferably, the inner conductor is formed by co-twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, and the diameter of each tin-plated copper monofilament is 0.04mm to 0.08 mm.

Preferably, an insulating lubricating silicone grease is filled between the inner conductor and the silane grafted cross-linked low-density polyethylene insulating layer.

Preferably, the nylon wire anti-torsion inner wrapping layer and the nylon wire anti-torsion outer wrapping layer are both of an inner-layer nylon wire and an outer-layer nylon wire which are in reverse spiral winding weaving structures, and the diameter of the nylon wire is 0.12mm to 0.28 mm.

Preferably, the outer surface of the TPU extruded inner sheath layer and the inner surface of the TPU extruded outer sheath layer are both provided with thermoplastic polyurethane bonding layers.

The utility model has the advantages that:

1. the control wire core is sleeved inside the Y-shaped silicon rubber filling core and arranged at the center of the cable core, so that the cable structure is balanced, the mechanical strength is enhanced, the stress concentration inside the control wire core is reduced, the lateral pressure when the control wire core bears bending is facilitated, the flexibility of the cable is improved, the grounding wire core adopts the silicon rubber sheath, the low temperature resistance, the weather resistance, the shock resistance and the good electrical insulation property are achieved, the elasticity is good, the stress concentration of each wire core inside the cable core is facilitated to be reduced, the mechanical strength is enhanced, the impact resistance is improved, the core breaking and wire breaking of each wire core are prevented, the stable electrical characteristics of the cable are ensured, the safety and reliability are better, and the service life is prolonged.

2. The special weaving structure that the nylon wire anti-torsion inner and outer wrapping layers are arranged between the TPU extruded inner and outer sheathing layers is beneficial to improving the tensile strength and anti-torsion performance of the cable, avoiding the occurrence of wire breaking and core breaking of the copper wire wrapping shielding layer, ensuring stable shielding characteristics, improving safety and reliability and reducing potential safety hazards.

The XLPE insulating layer has excellent cold resistance, is not easy to crack even under the low-temperature impact condition of minus 40 ℃, has good flexibility, has outstanding cold resistance of a TPU sheath, still keeps good elasticity and flexibility in a low-temperature environment and severe conditions, and has excellent ageing resistance and weather resistance and long service life.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

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

Reference numerals: the cable comprises a power wire core, a power conductor 11, an Ethylene Propylene Diene Monomer (EPDM) isolation layer 12, an XLPE insulation layer 13, a silicon rubber filling core 2-Y, a grounding wire core 3, a grounding conductor 31, a silicon rubber sheath 32, a control wire core 4, an insulation wire core 41, an inner conductor 411, a silane grafted crosslinked low-density polyethylene insulation layer 422, a fluororubber insulation layer 42, a TPU extruded inner sheath layer 5, a nylon wire anti-torsion inner wrapping layer 6, a copper wire wrapping shielding layer 7, a nylon wire anti-torsion outer wrapping layer 8 and a TPU extruded outer sheath layer 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a cold-resistant type rubber cover flexible cable that shocks resistance, including three power sinle silk 1 around 2 interval equipartitions of a Y shape silicon rubber filler core and constitute the cable core with 3 transposition of three earth core jointly, the cable core lay length does 10 to 30 times of 1 external diameter of power sinle silk. The Y-shaped silicon rubber filling core 2 is provided with a longitudinal hole, and a control wire core 4 is sleeved in the longitudinal hole. The power wire core 1 comprises a power conductor 11, an ethylene propylene diene monomer isolation layer 12 and an XLPE insulation layer 13, specifically, the power conductor 11 is formed by twisting a plurality of tinned copper wires, and the diameter of each tinned copper wire is 0.12mm to 0.36 mm. The grounding wire core 3 comprises a grounding conductor 31 and a silicon rubber sheath 32, further, the silicon rubber sheath 32 comprises an inner cylinder and an outer cylinder, a plurality of connecting ribs are radially and uniformly distributed between the inner cylinder and the outer cylinder, and the grounding conductor 31 is sleeved on the inner cylinder. Specifically, the grounding conductor 31 is formed by twisting and pressing a plurality of soft copper wires to form a circular conductor structure. The control wire core 4 comprises three insulated wire cores 41 which are jointly twisted to form a wire core body, the outer part of each wire core is coated with a fluororubber insulating layer 42, each insulated wire core 41 comprises an inner conductor 411 and a silane grafted and crosslinked low-density polyethylene insulating layer 422, and further, an insulating lubricating silicone grease is filled between the inner conductor 411 and the silane grafted and crosslinked low-density polyethylene insulating layer 422. Specifically, the inner conductor 411 is formed by co-twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, wherein the diameter of each tin-plated copper monofilament is 0.04mm to 0.08 mm.

The cable core is coated with a TPU extruded inner sheath layer 5, a nylon wire anti-torsion inner wrapping layer 6, a copper wire wrapping shielding layer 7, a nylon wire anti-torsion outer wrapping layer 8 and a TPU extruded outer sheath layer 9 in sequence, and further, thermoplastic polyurethane bonding layers are arranged on the outer surface of the TPU extruded inner sheath layer 5 and the inner surface of the TPU extruded outer sheath layer 9. In one embodiment, the copper wire is formed by reversely and spirally winding the tinned copper wires with two different wire diameters and a wire diameter ratio of 0.9 to 1 in a mixed manner around the shielding layer 7, wherein the wire diameter of the tinned copper wires is 0.24mm to 0.35mm, and the shielding density is 85% to 95%. In one embodiment, the nylon wire anti-twisting inner wrapping layer 6 and the nylon wire anti-twisting outer wrapping layer 8 are both of an inner and an outer double-layer nylon wire which are in a reverse spiral winding braided structure, and the diameter of the nylon wire is 0.12mm to 0.28 mm.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. Cold-resistant type rubber cover flexible cable that shocks resistance, characterized by: including three power sinle silk (1) around a Y shape silicon rubber filler (2) interval equipartition and jointly constitute the cable core with three earth core (3) transposition, the longitudinal hole has been seted up in Y shape silicon rubber filler (2), the longitudinal hole endotheca is equipped with control sinle silk (4), the cable core outside cladding has TPU crowded package inner sheath layer (5) in proper order, the antitorque interior package of nylon wire is around covering (6), copper wire around covering shielding layer (7), the antitorque outer package of nylon wire (8) and TPU crowded package outer sheath layer (9), power sinle silk (1) includes power conductor (11), EPT rubber isolation layer (12) and XLPE insulating layer (13), earth core (3) include ground conductor (31) and silicon rubber sheath (32), control sinle silk (4) include three insulation sinle silk (41) transposition jointly and constitute the line core body, the outer cladding fluorine rubber insulating layer (42) of sinle silk body, the insulated wire core (41) comprises an inner conductor (411) and a silane grafted cross-linked low density polyethylene insulating layer (422).

2. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the copper wire is formed by mixing tinned copper wires with two different wire diameters and a wire diameter ratio of 0.9 to 1 in a reverse spiral winding mode, the wire diameter of each tinned copper wire is 0.24mm to 0.35mm, and the shielding density is 85% to 95%.

3. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the cable core lay length is 10 to 30 times of the outer diameter of the power cable core (1).

4. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the power conductor (11) is formed by twisting a plurality of tinned copper wires, and the diameter of each tinned copper wire is 0.12 mm-0.36 mm.

5. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the silicon rubber protective sleeve (32) comprises an inner cylinder body and an outer cylinder body, a plurality of connecting ribs are radially and uniformly distributed between the inner cylinder body and the outer cylinder body, and the grounding conductor (31) is sleeved on the inner cylinder body.

6. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the grounding conductor (31) is a round conductor structure formed by twisting and pressing a plurality of soft copper wires.

7. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the inner conductor (411) is formed by co-twisting a plurality of tinned copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, wherein the diameter of each tinned copper monofilament is 0.04mm to 0.08 mm.

8. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: and an insulating lubricating silicone grease is filled between the inner conductor (411) and the silane grafted cross-linked low-density polyethylene insulating layer (422).

9. The cold-resistant impact-resistant rubber jacketed flexible cable of claim 1, wherein: the nylon wire anti-torsion inner wrapping layer (6) and the nylon wire anti-torsion outer wrapping layer (8) are both of an inner and outer double-layer nylon wire mutually reverse spiral winding braided structure, and the wire diameter of the nylon wire is 0.12mm to 0.28 mm.

10. The cold-resistant impact-resistant cabtyre cable of claim 1, wherein: the outer surface of the TPU extruded inner sheath layer (5) and the inner surface of the TPU extruded outer sheath layer (9) are both provided with thermoplastic polyurethane bonding layers.

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