CN217008725U - Tensile core-breaking-preventing reel cable - Google Patents

Abstract

The utility model discloses an anti-stretching and anti-core-breaking drum cable which comprises three power wire cores and a grounding wire core, wherein the three power wire cores and the grounding wire core are uniformly distributed around a central anti-stretching reinforced core material and are jointly twisted with a para-type wholly aromatic copolyamide stretched fiber filled core material to form a cable core, a butyronitrile polyvinyl chloride inner sheath layer, an AFRP reinforced wrapping layer and a butyronitrile polyvinyl chloride outer sheath layer are sequentially coated outside the cable core, the power wire core comprises an inner conductor and a TPEE extruded insulation layer, the inner conductor is formed by jointly twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide stretched fibers, the grounding wire core comprises a grounding conductor and a cross-linked fluororubber insulator, and the grounding conductor is a copper stranded wire. The cable core has the advantages of stable structure, balanced stress, excellent tensile resistance, no twisting phenomenon and prolonged service life.

Description

Tensile core-breaking-preventing reel cable

Technical Field

The utility model relates to the technical field of cables, in particular to an anti-tensile core-breaking-prevention reel cable.

Background

The high-strength tensile reel cable is applied to large-scale hoisting machinery, such as a stacker-reclaimer, a gantry crane, a travelling crane, a rocker arm type crane, a wharf hoisting machine, a tippler, a bucket wheel machine, a winding machine, a conveyor, a cable winder, a movable travelling crane, a crown block and various large-scale mobile equipment. Under strict conditions, the reel cable needs to be suitable for all-weather work in various environments and different climates, and the oil resistance and the weather resistance have standard requirements. However, many faults are common to the reel cable during long-term operation, which affects the normal production sequence. For example, the tensile resistance is insufficient, the cable is twisted and deformed after being stressed, and the core is broken and the wire is broken, so that the cable is scrapped. The cable sheath and the insulating layer are degraded, the core wire is directly stressed, the core wire is subjected to insulation abrasion, fatal damage occurs, the cable is short-circuited, and even fire accidents occur.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to solve the technical problem of providing the anti-tensile and anti-core-breaking reel cable, the cable core structure is stable, the stress is balanced, the anti-tensile property is excellent, the core breaking and the wire breaking are avoided, the distortion phenomenon is avoided, and the service life of the cable is prolonged.

The utility model solves the technical problems through the following technical scheme.

The stretch-proofing anti-breaking core reel cable comprises three power cores and a grounding core, wherein the three power cores and the grounding core are uniformly distributed around a central stretch-proofing reinforced core material and are twisted with a para-type wholly aromatic copolyamide stretched fiber filling core material to form a cable core, the central stretch-proofing reinforced core material is formed by twisting a plurality of aramid fiber bundles and stainless steel wires, the wire diameter of the stainless steel wires is 0.01-0.03 mm and is not more than 65% of the wire diameter of the aramid fiber bundles, a PTFE wear-reducing layer is coated outside the core body, a butyronitrile polyvinyl chloride inner sheath layer, an AFRP reinforced wrapping layer and a butyronitrile polyvinyl chloride outer sheath layer are sequentially coated outside the cable core, the power cores comprise inner conductors and TPEE extrusion wrapping insulating layers, the inner conductors are formed by twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide stretched fibers together, the grounding core comprises a grounding conductor and a cross-linked fluororubber insulator, the grounding conductor is a copper stranded wire.

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

Preferably, the aramid fiber bundles are formed by twisting a plurality of aramid fibers and integrally bonding the aramid fibers and thermoplastic polypropylene resin in a hot melting way.

Preferably, the wire diameter of the tin-plated copper monofilament is 0.02mm to 0.05 mm.

Preferably, the grounding conductor is formed by twisting and pressing a plurality of soft copper wires with the wire diameter of 0.04mm to 0.08mm to form a circular conductor structure.

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

Preferably, the AFRP reinforced wrapping layer is formed by an inner aramid fiber strand and an outer aramid fiber strand which are in reverse spiral winding and weaving structures, the spiral angles of the inner aramid fiber strand and the outer aramid fiber strand are different, and the diameter of the aramid fiber strand is 0.15mm to 0.28 mm.

Preferably, the aramid fiber strand is formed by twisting a plurality of aramid fibers and integrally bonding the aramid fibers and thermoplastic polypropylene resin in a hot melting mode.

Preferably, the outer diameter of the central stretch-proofing reinforced core material is smaller than the diameter of the grounding conductor, and the diameter of the grounding conductor is smaller than the diameter of the inner conductor.

Preferably, the outer surface of the butyronitrile polyvinyl chloride inner sheath layer or/and the inner surface of the butyronitrile polyvinyl chloride outer sheath layer are/is provided with a thermoplastic polyurethane adhesive layer.

The utility model has the beneficial effects that:

1. the power wire core, the grounding wire core, the central tensile-resistant reinforced core material and the para-type wholly aromatic copolyamide tensile fiber filling core material are jointly twisted, the central tensile-resistant reinforced core material is a core structure formed by twisting aramid fiber bundles and stainless steel wires, has high tensile strength and excellent tensile property, can relieve the load stress applied to the cable core from the outside to a certain extent in the aspect of lateral pressure resistance, reduces the local stress concentration of the wire core, avoids the wire core conductor from breaking and breaking, has high strength and large tensile elastic modulus, and can help to resist larger axial tensile force of the cable in the use process of regularly curling and winding and unwinding the cable, the cable core has the advantages that core breaking and wire breaking of the cable core are prevented, the overall bending resistance of the cable core is improved, the stability of electrical characteristics is guaranteed, and the durability is better.

2. The outer diameter of the central stretch-proofing reinforced core material is optimally designed to be smaller than the diameter of the grounding conductor, the diameter of the grounding conductor is smaller than that of the inner conductor, the grounding core is made of a cross-linked fluororubber insulator, the outer diameter consistency of the grounding core and the outer diameter consistency of the power core are kept, the flexibility of the cross-linked fluororubber insulator is better, the lateral pressure during bending can be borne, the mechanical strength inside the cable core is enhanced, the extrusion resistance is high, and the stretch-proofing performance of the cable is improved.

The TPEE extrusion coating insulating layer belongs to a high-performance engineering grade elastomer, has the characteristics of high mechanical strength, good elasticity, impact resistance, bending fatigue resistance and oil resistance, is beneficial to bearing lateral pressure when a cable core is bent, improves the flexibility and bending resistance of the cable, prevents short-circuit accidents caused by insulation abrasion of a power cable core, ensures the stable electrical characteristic of the cable, and has better durability.

4. Set up AFRP between the outer sheath layer in butyronitrile polyvinyl chloride and strengthen around the covering, AFRP strengthens around the covering and has high strength, tensile elastic modulus big to accessible thermoplastic polyurethane adhesive linkage bonds with interior outer sheath and becomes an organic whole, effectively prevents to take place the distortion behind the cable atress, guarantees the stability of cable electrical characteristic, increases life.

5. The butyronitrile polyvinyl chloride inner and outer sheath layers have high tensile strength, tear resistance, wear resistance, oil resistance and excellent weather resistance, stress points are concentrated through the reinforced extrusion structure, the fact that a core and a sheath in a cable core are not separated in the winding process of the cable is guaranteed, safe and reliable operation of the cable is guaranteed, and durability and usability are better.

Drawings

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

In the figure: the cable comprises a power wire core, a grounding wire core, a 3-central stretch-resistant reinforced core, a 4-para-type wholly aromatic copolyamide stretch fiber filled core, a 5-core, a 6-PTFE antifriction layer, a 7-butyronitrile polyvinyl chloride inner sheath layer, an 8-AFRP reinforced wrapping layer, a 9-butyronitrile polyvinyl chloride outer sheath layer, a 10-inner conductor, an 11-TPEE extruded insulation layer, a 12-grounding conductor and a 13-crosslinked fluororubber insulator.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1, the stretch-resistant and breakage-resistant core drum cable according to the embodiment of the present invention includes three power cores 1 and one ground core 2, which are uniformly distributed around a central stretch-resistant reinforced core material 3 and are twisted with a para-type wholly aromatic copolyamide stretch fiber filled core material 4 to form a cable core, and specifically, the outer diameter ratio of the power cores 1 to the ground core 2 is 1:1 to 1: 1.05. The lay length of the cable core is 10 to 20 times of the outer diameter of the power wire core 1. The central stretch-proofing reinforced core material 3 is formed by twisting a plurality of aramid fiber bundles and stainless steel wires to form a core body 5, and specifically, the aramid fiber bundles are formed by twisting a plurality of aramid fibers and are integrated with thermoplastic polypropylene resin through hot melting bonding. The diameter of the stainless steel wire is 0.01mm to 0.03mm and is not more than 65% of the diameter of the aramid fiber bundle. The core body 5 is externally coated with a PTFE antifriction layer 6. The power wire core 1 comprises an inner conductor 10 and a TPEE extruded insulation layer 11, wherein the inner conductor 10 is formed by jointly twisting a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide drawn fibers, and further, the wire diameter of the tin-plated copper monofilaments is 0.02mm to 0.05 mm. The grounding wire core 2 comprises a grounding conductor 12 and a cross-linked fluororubber insulator 13, the grounding conductor 12 is a copper stranded wire, and specifically, the grounding conductor 12 is a round conductor structure formed by twisting and pressing a plurality of soft copper wires with the wire diameter of 0.04mm to 0.08 mm. Further, the outer diameter of the central stretch-proofing reinforced core material 3 is smaller than the diameter of the grounding conductor 12, and the diameter of the grounding conductor 12 is smaller than the diameter of the inner conductor 10.

The cable core outside cladding has butyronitrile polyvinyl chloride inner sheath layer 7, AFRP in proper order and strengthens around covering 8 and butyronitrile polyvinyl chloride oversheath layer 9, and is further, butyronitrile polyvinyl chloride inner sheath layer 7 surface or/and butyronitrile polyvinyl chloride oversheath layer 9 internal surface is equipped with the thermoplastic polyurethane adhesive linkage. In one embodiment, the AFRP reinforced wrapping layer 8 is formed by an inner aramid fiber strand and an outer aramid fiber strand which are in reverse spiral winding weaving structures and have different spiral angles, the diameter of the aramid fiber strand is 0.15mm to 0.28mm, and the aramid fiber strand is formed by twisting a plurality of aramid fibers and is integrally bonded with thermoplastic polypropylene resin in a hot melting mode.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims (10)

1. Stretch-proofing disconnected core reel cable of preventing, characterized by: the cable comprises three power wire cores (1) and a grounding wire core (2), wherein the three power wire cores (1) and the grounding wire core (2) are uniformly distributed around a central stretch-proofing reinforced core (3) and are twisted together with a para-type wholly aromatic copolyamide stretched fiber filling core (4) to form a cable core, the central stretch-proofing reinforced core (3) is formed by twisting a plurality of aramid fiber bundles and stainless steel wires to form a core (5), the wire diameter of the stainless steel wires is 0.01mm to 0.03mm and is not more than 65% of the wire diameter of the aramid fiber bundles, a PTFE (polytetrafluoroethylene) antifriction layer (6) is coated outside the core (5), the cable core is sequentially coated with a butyronitrile polyvinyl chloride inner sheath layer (7), an AFRP (atomic fiber reinforced composite) and a butyronitrile polyvinyl chloride outer sheath layer (9), the power wire cores (1) comprise inner conductors (10) and TPEE extruded insulating layers (11), the inner conductors (10) are formed by twisting together a plurality of tin-plated copper monofilaments and a plurality of para-type wholly aromatic copolyamide stretched fibers, the grounding wire core (2) comprises a grounding conductor (12) and a cross-linked fluororubber insulator (13), and the grounding conductor (12) is a copper stranded wire.

2. The stretch resistant, breakage resistant core drum cable of claim 1, wherein: the power wire core (1) and the grounding wire core (2) have an outer diameter ratio of 1:1 to 1: 1.05.

3. The stretch resistant, break resistant core drum cable of claim 1, wherein: the aramid fiber bundles are formed by twisting a plurality of aramid fibers and bonding the aramid fibers and thermoplastic polypropylene resin into a whole in a hot melting way.

4. The stretch resistant, break resistant core drum cable of claim 1, wherein: the wire diameter of the tin-plated copper monofilament is 0.02mm to 0.05 mm.

5. The stretch resistant, break resistant core drum cable of claim 1, wherein: the grounding conductor (12) is a round conductor structure formed by twisting and pressing a plurality of soft copper wires with the wire diameter of 0.04mm to 0.08 mm.

6. The stretch resistant, breakage resistant core drum cable of claim 1, wherein: the cable core lay length is 10-20 times of the outer diameter of the power wire core (1).

7. The stretch resistant, break resistant core drum cable of claim 1, wherein: AFRP strengthens for inside and outside double-deck aramid fiber strand yarn each other for reverse spiral winding braid structure and spiral angle different around covering (8), aramid fiber strand yarn footpath is 0.15mm to 0.28 mm.

8. The stretch resistant, break resistant core drum cable of claim 7, wherein: the aramid fiber strand is formed by twisting a plurality of aramid fibers and bonding the aramid fibers and thermoplastic polypropylene resin into a whole in a hot melting way.

9. The stretch resistant, break resistant core drum cable of claim 1, wherein: the outer diameter of the central stretch-proofing reinforced core material (3) is smaller than the diameter of the grounding conductor (12), and the diameter of the grounding conductor (12) is smaller than the diameter of the inner conductor (10).

10. The stretch resistant, break resistant core drum cable of claim 1, wherein: and a thermoplastic polyurethane bonding layer is arranged on the outer surface of the butyronitrile polyvinyl chloride inner sheath layer (7) or/and the inner surface of the butyronitrile polyvinyl chloride outer sheath layer (9).

Images