Lightweight anti-rotation garbage grab machine moving cable

Abstract

The utility model discloses a lightweight anti-rotation garbage grab machine mobile cable comprising three power wire cores which are uniformly distributed at intervals of 120 degrees in the circumferential direction through a Y-shaped polyurethane elastomer isolation core, and the free ends of three forked separator plates of the Y-shaped polyurethane elastomer isolation core extend towards the outer side in an external expansion manner to form fan-shaped parts. Each sector part is provided with a longitudinal hole and is sleeved with a grounding conductor, the Y-shaped polyurethane elastomer isolation core is externally coated with a polyurethane extruded inner sheath, an AFRP reinforced woven tensile layer, a polyurethane extruded outer sheath and an EVA wear-resistant protective layer, and each power wire core comprises a power conductor, a semi-conductive nylon wrapping layer and a polyvinyl chloride insulating layer. Each power conductor comprises an aluminum alloy inner conductor layer formed by twisting aluminum alloy strands, and tinned copper strands are twisted around the outside of the aluminum alloy inner conductor layer to form a copper alloy twisted wire outer conductor layer. The cable is light in weight preparation, the conductor structure is not easy to loosen, the cable core structure is round and balanced, rotation is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a lightweight anti-rotation garbage grab mobile cable. Background Art

[0002] Mobile power cables are required for garbage cranes, ash cranes and other grabbing equipment in waste incineration plants, waste power plants and other occasions and environments. The working conditions of the grabbing cranes are relatively harsh, the ambient temperature is high, the cables are frequently moved up and down, the vertical drop force is large, the friction on the reel is quite large, the cable sheath is damaged prematurely, the life is short, and it is easy to bulge, twist and deform, and even break the core. Ordinary mobile cables use copper wire conductors. The copper wire is thick, and the friction caused by frequent movement can easily puncture the insulation and cause a short circuit. In addition, the copper wire twisting structure is loose and the twisting pitch is large. When the cable moves up and down at high speed, it is easy to bend and jump out, and the cable core is pulled out, forming a swirl, causing a broken core and a short circuit, shortening the service life of the cable, and the durability is poor. Utility Model Content

[0003] The present application aims to solve the technical problem of providing a lightweight anti-rotation garbage grab mobile cable based on a copper-clad aluminum conductor structure, which reduces the amount of copper used and is lightweight. The conductor structure has high strength and is not easy to loosen. The cable core structure is round and balanced to avoid rotation. The outer skin has better wear resistance and extends the service life.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] The lightweight anti-rotation garbage grab mobile cable includes three power line cores evenly spaced at 120 degrees around the Y-shaped polyurethane elastomer isolation core. The free ends of the three bifurcated partitions of the Y-shaped polyurethane elastomer isolation core extend outward to form a fan-shaped portion. The fan-shaped portion is provided with a longitudinal hole. The gap in the longitudinal hole is sleeved with a grounding conductor. The outside of the Y-shaped polyurethane elastomer isolation core is sequentially coated with a polyurethane extruded inner sheath, an AFRP reinforced braided tensile layer, a polyurethane extruded outer sheath and an EVA wear-resistant protective layer. Nylon fiber filling core material is filled between the Y-shaped polyurethane elastomer isolation core and the polyurethane extruded inner sheath. The power line core includes a power conductor, a semi-conductive nylon sheath and a polyvinyl chloride insulation layer. The power conductor includes an aluminum alloy inner conductor layer formed by twisting a plurality of aluminum alloy strands, and a plurality of tinned copper strands are twisted around the outside of the aluminum alloy inner conductor layer to form a copper alloy stranded wire outer conductor layer. Lubricating grease is filled between the aluminum alloy inner conductor layer and the copper alloy stranded wire outer conductor layer. The ratio of the diameter of the tinned copper strand to the diameter of the aluminum alloy strand is 1:1 to 1.1:1. The semi-conductive nylon sheath is a semi-conductive nylon tape overlapping sheath structure. The winding direction of the semi-conductive nylon sheath is opposite to the twisting direction of the tinned copper strands. The grounding conductor is a bare copper wire.

[0006] Preferably, the aluminum alloy strands are formed by twisting together a number of aluminum alloy wires with a wire diameter of 0.02 mm to 0.08 mm, the wire diameter of the aluminum alloy strands is 0.1 mm to 0.3 mm, and the twisting direction of the aluminum alloy wires is opposite to that of the aluminum alloy strands.

[0007] Preferably, the tinned copper strands are formed by twisting together several tinned copper wires with a wire diameter of 0.02 mm to 0.08 mm, the wire diameter of the tinned copper strands is 0.1 mm to 0.3 mm, and the twisting direction of the tinned copper wires is opposite to that of the tinned copper strands.

[0008] Preferably, the grounding conductor is a plurality of soft copper wires with a wire diameter of 0.1 mm to 0.2 mm twisted and pressed into a circular conductor structure.

[0009] Preferably, the longitudinal hole gap is filled with lubricating grease.

[0010] Preferably, the overlap rate of the semi-conductive nylon tape is one quarter to one half of the width of the semi-conductive nylon tape.

[0011] Preferably, the lay length of the tinned copper strands is greater than the lay length of the aluminum alloy strands.

[0012] Preferably, the AFRP reinforced braided tensile layer is a braided structure in which inner and outer double layers of aramid strands are spirally wound in opposite directions.

[0013] Preferably, the outer surface of the polyurethane extruded inner sheath and the inner surface of the polyurethane extruded outer sheath are both provided with a thermoplastic EVA adhesive layer.

[0014] Preferably, the EVA wear-resistant protective layer has a thickness of 0.1 mm to 0.3 mm.

[0015] Beneficial effects of this application:

[0016] 1. The cable power core conductor structure is formed by using an aluminum alloy inner conductor layer and a copper alloy stranded wire outer conductor layer. The aluminum alloy inner conductor layer is used to replace a part of the copper alloy conductor, which reduces the amount of copper conductor, greatly reduces the preparation cost, and realizes the preparation of lightweight cables. The outer conductor layer formed by the twisting of tin-copper strands is tightly wrapped around the outside of the aluminum alloy inner conductor layer formed by the twisting of aluminum alloy strands. The conductor structure is tight and is wrapped with a semi-conductive nylon tape in the opposite direction to the twisting direction of the tinned copper strands, which helps to prevent the structure from being loose. When the cable moves at high speed, it will not bend and run out, avoiding the loosening and pulling out of the cable core and causing rotation, and preventing the occurrence of broken core short circuits. Lubricating grease is filled between the aluminum alloy inner conductor layer and the copper alloy stranded wire outer conductor layer to reduce the contact friction between the aluminum wire and the copper wire, inhibit wire breakage, ensure the good electrical properties of the conductor, extend the service life, and improve durability.

[0017] 2. By adding a semi-conductive nylon wrapping layer between the power conductor and the polyvinyl chloride insulation layer, it helps to prevent the insulation layer from penetrating into the tinned copper wires of the outer conductor layer of the copper alloy stranded wire and causing adhesion, which is beneficial to enhance the flexibility and bending resistance of the power conductor, prevent wire breakage and core breakage, and at the same time effectively protect the insulation layer, maintain stable electrical properties, and improve durability and applicability.

[0018] 3. The optimized Y-shaped polyurethane elastomer isolation core is used to isolate and evenly distribute the three power line cores and the three grounding conductors. The cable core structure is round, balanced and stable, which can effectively prevent core crosstalk, form an effective electrical insulation distance and ensure better mechanical strength. It has better flexibility, helps to reduce the occurrence of wire and core breaks, ensures stable electrical characteristics, and has better durability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Description of reference numerals:

[0021] 1-power line core, 2-Y-shaped polyurethane elastomer isolation core, 3-bifurcation partition, 4-fan-shaped part, 5-longitudinal hole, 6-grounding conductor, 7-polyurethane extruded inner sheath, 8-AFRP reinforced braided tensile layer, 9-polyurethane extruded outer sheath, 10-EVA wear-resistant protective layer, 11-nylon fiber filled core material, 12-power conductor, 13-semi-conductive nylon winding layer, 14-polyvinyl chloride insulation layer, 15-aluminum alloy inner conductor layer, 16-copper alloy stranded wire outer conductor layer. DETAILED DESCRIPTION

[0022] The terms used in the implementation method part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The implementation method of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1The lightweight anti-rotation garbage grab mobile cable of the embodiment of the present application includes three power cores 1 evenly spaced at 120 degrees in the circumferential direction through a Y-shaped polyurethane elastomer isolation core 2, and the power core 1 includes a power conductor 12, a semi-conductive nylon sheath 13 and a polyvinyl chloride insulation layer 14. The power conductor 12 includes an aluminum alloy inner conductor layer 15 formed by twisting a plurality of aluminum alloy strands. Specifically, the aluminum alloy strands are formed by twisting a plurality of aluminum alloy wires with a wire diameter of 0.02 mm to 0.08 mm, and the wire diameter of the aluminum alloy strands is 0.1 mm to 0.3 mm. The twist direction of the aluminum alloy wires is opposite to that of the aluminum alloy strands. A plurality of tinned copper strands are twisted around the outside of the aluminum alloy inner conductor layer 15 to form a copper alloy stranded wire outer conductor layer 16. Specifically, the tinned copper strands are formed by twisting a plurality of tinned copper wires with a wire diameter of 0.02 mm to 0.08 mm. The wire diameter of the tinned copper strands is 0.1 mm to 0.3 mm. The twist direction of the tinned copper wires is opposite to that of the tinned copper strands. Lubricating grease is filled between the aluminum alloy inner conductor layer 15 and the copper alloy stranded wire outer conductor layer 16. The ratio of the diameter of the tinned copper strands to the diameter of the aluminum alloy strands is 1:1 to 1.1:1. Further, the twist pitch of the tinned copper strands is greater than the twist pitch of the aluminum alloy strands. The semi-conductive nylon wrapping layer 13 is a semi-conductive nylon tape overlapping wrapping structure. Further, the overlap rate of the semi-conductive nylon tape is one-fourth to one-half of the width of the semi-conductive nylon tape. The winding direction of the semi-conductive nylon wrapping layer 13 is opposite to the twisting direction of the tinned copper strands. The free ends of the three branch partitions 3 of the Y-shaped polyurethane elastomer isolation core 2 extend outward to form a fan-shaped portion 4. The fan-shaped portion 4 is provided with a longitudinal hole 5. The gap in the longitudinal hole 5 is sleeved with a grounding conductor 6. The gap in the longitudinal hole 5 is filled with lubricating grease.

[0024] The Y-shaped polyurethane elastomer isolation core 2 is coated with a polyurethane extruded inner sheath 7, an AFRP reinforced braided tensile layer 8, a polyurethane extruded outer sheath 9 and an EVA wear-resistant protective layer 10 in sequence. The Y-shaped polyurethane elastomer isolation core 2 and the polyurethane extruded inner sheath 7 are filled with a nylon fiber filling core material 11. Furthermore, the outer surface of the polyurethane extruded inner sheath 7 and the inner surface of the polyurethane extruded outer sheath 9 are both provided with a thermoplastic EVA adhesive layer. The grounding conductor 6 is a bare copper wire. Specifically, the grounding conductor 6 is a plurality of soft copper wires with a wire diameter of 0.1mm to 0.2mm twisted and pressed into a circular conductor structure. In one embodiment, the AFRP reinforced braided tensile layer 8 is a double-layer aramid strand braided structure with opposite spiral windings. The EVA wear-resistant protective layer 10 has a thickness of 0.1mm to 0.3mm.

[0025] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. Lightweight anti-rotation garbage grab mobile cable, its characteristics are: The invention comprises three power line cores (1) uniformly arranged at intervals of 120 degrees in the circumferential direction through a Y-shaped polyurethane elastomer isolation core (2); the free ends of the three bifurcated partitions (3) of the Y-shaped polyurethane elastomer isolation core (2) extend outward in an outwardly expanding manner to form a fan-shaped portion (4); the fan-shaped portion (4) is provided with a longitudinal hole (5); a grounding conductor (6) is sleeved in the inner gap of the longitudinal hole (5); the outer portion of the Y-shaped polyurethane elastomer isolation core (2) is sequentially covered with a polyurethane extruded inner sheath (7), an AFRP reinforced braided tensile layer (8), a polyurethane extruded outer sheath (9) and an EVA wear-resistant protective layer (10); a nylon fiber filling core material (11) is filled between the Y-shaped polyurethane elastomer isolation core (2) and the polyurethane extruded inner sheath (7); the power line core (1 ) comprises a power conductor (12), a semi-conductive nylon sheath (13) and a polyvinyl chloride insulation layer (14), the power conductor (12) comprising an aluminum alloy inner conductor layer (15) formed by twisting a plurality of aluminum alloy strands, a plurality of tinned copper strands twisted around the outside of the aluminum alloy inner conductor layer (15) to form a copper alloy stranded wire outer conductor layer (16), lubricating grease is filled between the aluminum alloy inner conductor layer (15) and the copper alloy stranded wire outer conductor layer (16), the ratio of the diameter of the tinned copper strands to the diameter of the aluminum alloy strands is 1:1 to 1.1:1, the semi-conductive nylon sheath (13) is a semi-conductive nylon tape overlapping sheath structure, the winding direction of the semi-conductive nylon sheath (13) is opposite to the twisting direction of the tinned copper strands, and the grounding conductor (6) is a bare copper wire.

2. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The aluminum alloy strands are formed by twisting a plurality of aluminum alloy wires with a wire diameter of 0.02 mm to 0.08 mm, the wire diameter of the aluminum alloy strands is 0.1 mm to 0.3 mm, and the twisting direction of the aluminum alloy wires is opposite to that of the aluminum alloy strands.

3. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The tinned copper strands are formed by twisting a number of tinned copper wires with a wire diameter of 0.02 mm to 0.08 mm, the wire diameter of the tinned copper strands is 0.1 mm to 0.3 mm, and the twisting direction of the tinned copper wires is opposite to that of the tinned copper strands.

4. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The grounding conductor (6) is a plurality of soft copper wires with a wire diameter of 0.1 mm to 0.2 mm twisted and pressed into a circular conductor structure.

5. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The gap between the longitudinal holes (5) is filled with lubricating grease.

6. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The overlap rate of the semi-conductive nylon tape is one quarter to one half of the width of the semi-conductive nylon tape.

7. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The lay length of the tinned copper strands is greater than the lay length of the aluminum alloy strands.

8. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The AFRP reinforced braided tensile layer (8) is a braided structure in which inner and outer double layers of aramid strands are mutually reversely spirally wound.

9. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The outer surface of the polyurethane extruded inner sheath (7) and the inner surface of the polyurethane extruded outer sheath (9) are both provided with a thermoplastic EVA adhesive layer.

10. The lightweight anti-rotation garbage grab moving cable according to claim 1 is characterized by: The EVA wear-resistant protective layer (10) has a thickness of 0.1 mm to 0.3 mm.

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