Single-steel-wire-rope bearing type anti-breaking electric hoist cable

Abstract

The utility model discloses a single steel wire rope bearing type anti-breaking electric hoist cable, which comprises multi-core control wire cores and steel wire bearing stranded wires, wherein the multi-core control wire cores and the steel wire bearing stranded wires are arranged at intervals and are jointly coated in a polyurethane elastomer outer sheath; the multi-core control wire core comprises four twisted-pair wire cores which are jointly twisted around a nylon fiber rope to form an inner-layer wire core body, the outer portion of the inner-layer wire core body is sequentially coated with a polyurethane elastomer inner sheath and a Kevlar woven mesh, four longitudinal holes are evenly formed in the polyurethane elastomer inner sheath in the circumferential direction, and each longitudinal hole is internally provided with four insulating wires and filled with a nylon fiber core material. Each twisted-pair wire core comprises a twisted-pair wire core body formed by twisting two insulated wires, and the twisted-pair wire core body is sequentially coated with a metal wire mixed-weaving sub-shielding layer and a semi-conductive nylon tape wrapping layer. According to the electric hoist cable, the single steel wire rope is used for bearing, the cable core structure is balanced and stable, the vibration reduction performance is better, core channeling is avoided, the shielding layer structure of the twisted control wire cores is optimized, wire breakage is not prone to occurring, and the durability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a single steel wire rope bearing type anti-breaking electric hoist cable. Background Art

[0002] The cable connecting the electric hoist and the arm controller is used in dry or humid working conditions, and can force the installation of non-continuous left and right movements, such as electric hoists, cranes and flaw detection equipment, self-supporting shafts or inclined shelves, cranes, ports and other occasions. It can also be used in open air environments according to different climatic conditions and usage occasions. The electric hoist cable adopts single or double steel wire mechanical load, and the cabling method is to twist the control core and the power core in the same layer. The cable core structure has weak balance stability, low mechanical strength, poor vibration reduction performance, and the cable core structure is prone to deformation under vibration, causing core cross-linking. It is easy to break the shielding layer of the twisted control core after repeated movement and bending, and the durability is poor. Long-term use has safety hazards, and the short replacement cycle increases maintenance costs. Utility Model Content

[0003] The utility model aims to solve the technical problem of providing a single steel wire rope-loaded anti-breaking electric hoist cable, which is loaded with a single steel wire rope and has a certain mechanical load-bearing capacity. The cable core structure is balanced and stable, the vibration reduction performance is better, and core channeling is avoided. The shielding layer structure of the twisted control wire core is optimized, and wire breakage is not prone to occur, thereby ensuring stable electrical characteristics and better durability.

[0004] The utility model solves the above technical problems through the following technical solutions.

[0005] A single steel wire rope-bearing anti-breakage electric hoist cable comprises a multi-core control core and a steel wire bearing strand arranged at intervals and jointly coated in a polyurethane elastomer outer sheath, wherein the polyurethane elastomer outer sheath is provided with a thin connecting rib on the interval section between the multi-core control core and the steel wire bearing strand, wherein the multi-core control core comprises four twisted wire cores twisted together around a nylon fiber rope to form an inner wire core body, wherein the outer portion of the inner wire core body is sequentially coated with a polyurethane elastomer inner sheath and a Kevlar braided mesh, wherein the polyurethane elastomer inner sheath is provided with four longitudinal holes evenly distributed in the circumference, wherein four insulating wires are arranged in each longitudinal hole and filled with nylon fiber core material, wherein the twisted wire core comprises two insulating wires twisted together to form a twisted wire core body, wherein the outer portion of the twisted wire core body is sequentially coated with a metal wire mixed shielding layer and a semi-conductive nylon tape winding layer, and the outer diameter of the polyurethane elastomer inner sheath does not exceed 24 mm.

[0006] Preferably, the insulated wire comprises an inner conductor and an XLPE insulation layer.

[0007] Preferably, the inner conductor is composed of a plurality of tinned copper monofilaments with a diameter of 0.05 mm to 0.1 mm twisted together.

[0008] Preferably, the steel wire load-bearing strand is formed by twisting galvanized steel wires.

[0009] Preferably, the metal wire mixed shielding layer is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are woven in counter-rotating spirals. The wire diameter of the tinned copper wire is 0.05mm to 0.08mm, and the wire diameter of the aluminum-magnesium wire is 0.04mm to 0.05mm. The wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire.

[0010] Preferably, the metal wire mixed shielding layer is coated with insulating lubricating silicone grease.

[0011] Preferably, the semi-conductive nylon tape wrapping layer is a semi-conductive nylon tape overlapping wrapping structure, and the winding direction is opposite to the twisting direction of the twisted wire core.

[0012] Preferably, the shielding density of the mixed metal wire shielding layer is not less than 95%.

[0013] Preferably, the Kevlar braided mesh is formed by a plurality of Kevlar threads being woven in counter-rotating spirals with a braiding density of not less than 90%.

[0014] Preferably, a gap is formed between the Kevlar woven mesh and the polyurethane elastomer outer sheath, and the gap distance is 0.05 mm to 0.1 mm.

[0015] Beneficial effects of the utility model:

[0016] 1. The polyurethane elastomer inner sheath is used to effectively separate and arrange four twisted cores and 16 insulated wires in two layers to form a cable core structure, which effectively prevents the occurrence of core crosstalk in the same layer. The cable core structure is more balanced and stable. The polyurethane elastomer has high elasticity, which helps to improve the vibration reduction performance of the cable, is beneficial to reduce the oscillation load borne by each insulated wire, and reduces the lateral pressure on the twisted core when bending, improves the bending resistance, inhibits wire and core breakage, ensures stable electrical characteristics, and has better durability and applicability.

[0017] 2. Optimize the shielding layer structure of the twisted pair core, replace the original single copper wire braiding structure, and adopt tinned copper wire and aluminum-magnesium wire to twist and twist the braiding structure in reverse spiral. The tinned copper wire has strong rigidity and better conductivity. The aluminum-magnesium wire is weaker than the tinned copper wire. The shielding layer formed by twisting and twisting the tinned copper wire and the aluminum-magnesium wire in reverse spiral has both flexibility and rigidity. The diameter of the tinned copper wire in the outer layer is larger than that of the aluminum-magnesium wire in the inner layer, which is beneficial to suppress the breakage of the shielding layer when the cable moves and bends repeatedly, thereby ensuring the stability of the shielding performance and better durability.

[0018] 3. By using a single steel wire rope to carry the stranded wire, a certain tensile strength and mechanical load bearing capacity are ensured. Adding a Kevlar braided mesh helps to improve the tensile strength and torsional resistance of the cable, and effectively protects the multi-core control wire core. The gap between the Kevlar braided mesh and the polyurethane elastomer outer sheath is 0.05mm to 0.1mm, which avoids adhesion with the outer sheath layer, is beneficial for the multi-core control wire core to maintain expansion and contraction margin, and extend axially during repetitive movement and bending, thereby reducing the occurrence of wire core breakage and improving durability and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model.

[0020] In the figure: 1-multi-core control wire core, 2-steel wire load-bearing stranded wire, 3-polyurethane elastomer outer sheath, 4-thin connecting ribs, 5-twisted wire core, 6-polyurethane elastomer inner sheath, 7-Kevlar braided mesh, 8-longitudinal hole, 9-insulated wire, 10-nylon fiber core material, 11-nylon fiber rope, 12-metal wire mixed shielding layer, 13-semi-conductive nylon tape wrapping layer, 14-inner conductor, 15-XLPE insulation layer. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0022] like Figure 1 As shown, the single steel wire rope load-bearing anti-break electric hoist cable of the utility model embodiment includes a multi-core control wire core 1 and a steel wire load-bearing strand 2 arranged at intervals and jointly coated in a polyurethane elastomer outer sheath 3, wherein the polyurethane elastomer outer sheath 3 is formed with a thin connecting rib 4 on the interval section between the multi-core control wire core 1 and the steel wire load-bearing strand 2, and further, the steel wire load-bearing strand 2 is formed by twisting galvanized steel wires.

[0023] The multi-core control wire core 1 includes four twisted pairs of cores 5 twisted together around a nylon fiber rope 11 to form an inner layer of the core body, the twisted pair of cores 5 includes two insulated wires 9 twisted together to form a twisted pair of core bodies, and the outer part of the twisted pair of core bodies is sequentially coated with a metal wire mixed shielding layer 12 and a semi-conductive nylon tape wrapping layer 13, specifically, the metal wire mixed shielding layer 12 is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are mutually reversely spirally wound and woven, the wire diameter of the tinned copper wire is 0.05mm to 0.08mm, the wire diameter of the aluminum-magnesium wire is 0.04mm to 0.05mm, and the wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire. The metal wire mixed shielding layer 12 is coated with insulating lubricating silicone grease. The shielding density of the metal wire mixed shielding layer 12 is not less than 95%. In one embodiment, the semi-conductive nylon tape wrapping layer 13 is a semi-conductive nylon tape overlapping wrapping structure, and the winding direction is opposite to the twisting direction of the twisted wire core.

[0024] The outer part of the inner wire core is covered with a polyurethane elastomer inner sheath 6 and a Kevlar braided mesh 7 in sequence. Furthermore, a gap is formed between the Kevlar braided mesh 7 and the polyurethane elastomer outer sheath 3, and the gap distance is 0.05mm to 0.1mm. The polyurethane elastomer inner sheath 6 is evenly distributed with four longitudinal holes 8 in the circumference, and four insulating wires 9 are arranged in each longitudinal hole 8 and filled with nylon fiber core material 10. In one embodiment, the insulating wire 9 includes an inner conductor 14 and an XLPE insulating layer 15. Furthermore, the inner conductor 14 is composed of a plurality of tinned copper monofilaments with a diameter of 0.05mm to 0.1mm twisted together. In one embodiment, the Kevlar braided mesh 7 is composed of a plurality of Kevlar wires that are mutually reversely spirally wound and woven, and the braiding density is not less than 90%. The outer diameter of the polyurethane elastomer inner sheath 6 does not exceed 24mm.

[0025] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. Single wire rope bearing type anti-breaking electric hoist cable, its characteristics are: The invention comprises a multi-core control wire core (1) and a steel wire load-bearing strand (2) arranged at intervals and jointly coated in a polyurethane elastic outer sheath (3), wherein the polyurethane elastic outer sheath (3) is provided with a thin connecting rib (4) at the interval section between the multi-core control wire core (1) and the steel wire load-bearing strand (2), and the multi-core control wire core (1) comprises four pairs of twisted wire cores (5) twisted together around a nylon fiber rope (11) to form an inner wire core body, and the outer surface of the inner wire core body is sequentially coated with a polyurethane elastic inner sheath (4). The polyurethane elastomer inner sheath (6) is provided with four longitudinal holes (8) evenly distributed in the circumferential direction, four insulating wires (9) are arranged in each longitudinal hole (8) and filled with nylon fiber core material (10), the twisted wire core (5) comprises two insulating wires (9) twisted together to form a twisted wire core body, the outside of the twisted wire core body is sequentially coated with a metal wire mixed shielding layer (12) and a semi-conductive nylon tape wrapping layer (13), and the outer diameter of the polyurethane elastomer inner sheath (6) does not exceed 24 mm.

2. The single steel wire rope bearing type anti-breaking electric hoist cable according to claim 1 is characterized in that: The insulated wire (9) comprises an inner conductor (14) and an XLPE insulation layer (15).

3. The single steel wire rope bearing type anti-breaking electric hoist cable according to claim 2 is characterized in that: The inner conductor (14) is composed of a plurality of tinned copper monofilaments having a diameter of 0.05 mm to 0.1 mm twisted together.

4. The single steel wire rope load-bearing anti-breaking electric hoist cable according to claim 1 is characterized in that: The steel wire load-bearing strand (2) is formed by twisting galvanized steel wires.

5. The single steel wire rope load-bearing anti-breaking electric hoist cable according to claim 1 is characterized in that: The metal wire mixed shielding layer (12) is composed of an inner layer of aluminum-magnesium wire and an outer layer of tinned copper wire, which are mutually spirally wound and woven in opposite directions. The wire diameter of the tinned copper wire is 0.05 mm to 0.08 mm, and the wire diameter of the aluminum-magnesium wire is 0.04 mm to 0.05 mm. The wire diameter of the tinned copper wire is larger than the wire diameter of the aluminum-magnesium wire.

6. The single steel wire rope load-bearing anti-breaking electric hoist cable according to claim 1 is characterized by: The metal wire mixed shielding layer (12) is coated with insulating lubricating silicone grease.

7. The single steel wire rope bearing type anti-breaking electric hoist cable according to claim 1 is characterized by: The semi-conductive nylon tape wrapping layer (13) is a semi-conductive nylon tape overlapping wrapping structure, and the wrapping direction is opposite to the twisting direction of the twisted wire core.

8. The single steel wire rope bearing type anti-breaking electric hoist cable according to claim 1 is characterized in that: The shielding density of the metal wire mixed shielding layer (12) is not less than 95%.

9. The single steel wire rope bearing type anti-breaking electric hoist cable according to claim 1 is characterized by: The Kevlar braided mesh (7) is formed by a plurality of Kevlar threads being mutually spirally wound and braided, and the braiding density is not less than 90%.

10. The single steel wire rope bearing type anti-breaking electric hoist cable according to claim 1 is characterized in that: A gap is formed between the Kevlar braided mesh (7) and the polyurethane elastomer outer sheath (3), and the gap distance is 0.05 mm to 0.1 mm.

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