Light vibration reduction type bending-resistant garbage crane reel cable

Abstract

The utility model discloses a light vibration damping type bending-resistant garbage crane reel cable, which comprises four power wire cores and two star-quad control wire cores, wherein the power wire cores and the two star-quad control wire cores are arranged around a TPU elastomer inner-layer vibration damping core tube and are jointly twisted with a TPU elastomer outer-layer vibration damping core tube to form a cable core; each power wire core comprises a power conductor, a semi-conductive nylon wrapping layer and a polyvinyl chloride insulating layer, each control wire core comprises four insulating wire cores and a plurality of polyester staple fiber filling cores which are twisted together to form a wire core body, and the wire core body is coated with a semi-conductive PET resin wrapping layer. An ETFE resin wrapping antifriction layer, a polyether polyurethane inner sheath layer, a Kevlar fiber braid layer and a polyether polyurethane outer sheath layer are sequentially wrapped outside the cable core. The cable is based on a copper-clad aluminum wire conductor structure and prepared in a light weight mode, the cable core structure is round and balanced, the bending resistance is better, the overall mechanical strength of the cable is high, vibration can be relieved, loads borne by all the wire cores are reduced, and durability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a lightweight vibration-damping anti-bending garbage hanging drum cable. Background Art

[0002] Garbage cranes, ash cranes and other grabbing equipment in waste incineration plants, waste power plants and other occasions and environments need to use drum cables. As the equipment moves back and forth, the drum reels and unwinds. The working conditions of the grab crane are relatively harsh, the ambient temperature is high, the cable is frequently moved up and down, the vertical drop tension is large, the friction on the drum is quite large, and the friction caused by frequent movement makes it easy for the copper wire conductor to puncture the insulation and cause a short circuit, which poses a safety hazard. Moreover, under the constraints of flexibility and mechanical strength, ordinary drum cables have poor bending and impact resistance. When subjected to slight impact, the vibration reduction performance is insufficient, and the cable core structure is easily deformed, causing the wires to break, affecting the electrical characteristics and poor durability. Utility Model Content

[0003] The utility model aims to solve the technical problem of providing a lightweight, vibration-damping, anti-bending garbage hanging drum cable based on a copper-clad aluminum wire conductor structure, with lightweight and balanced cable core structure, better anti-bending performance, high overall mechanical strength of the cable, better impact resistance, the ability to slow down vibration, reduce the load on each wire core, and better durability.

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

[0005] A lightweight vibration-damping anti-bending garbage hanging drum cable comprises four power cores and two star-twisted control cores arranged around a TPU elastomer inner layer vibration-damping core tube and twisted together with a TPU elastomer outer layer vibration-damping core tube to form a cable core, wherein the inner sleeve of the TPU elastomer inner layer vibration-damping core tube is provided with a steel wire reinforcement core, and the inner sleeve of the TPU elastomer outer layer vibration-damping core tube is provided with a polyester short fiber buffer core, the power core comprises a power conductor, a semi-conductive nylon sheath and a polyvinyl chloride insulation layer, the power conductor comprises an aluminum alloy inner conductor layer formed by twisting a plurality of aluminum alloy wires, and a plurality of copper alloy strands surround the aluminum alloy inner conductor The outer conductor layer is twisted to form a copper alloy stranded wire outer conductor layer, the control core includes four insulating cores and a plurality of polyester staple fiber filling cores twisted together to form a core body, the insulating core includes a fine aluminum stranded wire inner conductor layer, a plurality of thick copper stranded wires are twisted around the fine aluminum stranded wire inner conductor layer to form a thick copper stranded wire outer conductor layer, the outer conductor layer of the thick copper stranded wire is coated with an XLPE insulation layer, the core body is coated with a semi-conductive PET resin winding layer, and the outer core is coated with an ETFE resin winding anti-friction layer, a polyether polyurethane inner sheath layer, a Kevlar fiber braided layer and a polyether polyurethane outer sheath layer in sequence.

[0006] Preferably, the diameter of the aluminum alloy wire is 0.08 mm to 0.15 mm, the diameter of the copper alloy stranded wire is 0.1 mm to 0.5 mm, and the twist direction of the aluminum alloy wire is opposite to that of the copper alloy stranded wire.

[0007] Preferably, the inner conductor layer of the thin aluminum stranded wire is composed of a number of aluminum alloy monofilaments with a wire diameter of 0.04mm to 0.08mm coaxially twisted, and the thick copper stranded wire is composed of a number of copper alloy monofilaments with a wire diameter of 0.1mm to 0.2mm coaxially twisted.

[0008] Preferably, the inner conductor layer of the thin aluminum stranded wire and the outer conductor layer of the thick copper stranded wire are twisted in the same direction, and the lay length of the outer conductor layer of the thick copper stranded wire is greater than the lay length of the inner conductor layer of the thin aluminum stranded wire.

[0009] Preferably, the semi-conductive nylon wrapping layer is a semi-conductive nylon tape overlapping wrapping structure, and the winding direction of the semi-conductive nylon wrapping layer is opposite to the twisting direction of the copper alloy stranded wire outer conductor layer.

[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 steel wire reinforcement core is formed by twisting a plurality of polyester short fiber bundles with galvanized steel wires.

[0012] Preferably, the ETFE resin anti-friction layer is wound with gaps and the winding distance is 2 to 4 times the bandwidth.

[0013] Preferably, the Kevlar fiber braided layer is a braided structure in which inner and outer double layers of Kevlar wires are spirally wound in opposite directions with a braiding density of not less than 95%.

[0014] Preferably, the outer surface of the polyether polyurethane inner sheath layer and the inner surface of the polyether polyurethane outer sheath layer are both provided with a thermoplastic EVA adhesive layer.

[0015] Beneficial effects of the utility model:

[0016] 1. The four power cores and two control cores are evenly distributed through the inner and outer vibration-damping core tubes of the TPU elastomer. The cable core structure is round, more balanced and stable, with better softness and bending resistance, better flexibility and higher mechanical strength. In the case of slight impact, it has better vibration reduction effect, helps to reduce the load on each core, improves the impact resistance of the cable, avoids the breakage of each core, ensures stable electrical characteristics, and has better durability.

[0017] 2. A polyester staple fiber filling core is added inside the control core and twisted with four insulating cores to ensure the circular cross-section of the core body, making the core structure more balanced and stable, improving the mechanical strength, and helping to buffer vibration. The polyester staple fiber absorbs energy, which helps to reduce the extrusion force and lateral pressure when the cable is repeatedly bent, reducing the load applied to the insulating core, preventing the core from breaking, and improving durability.

[0018] 3. The power conductor uses an aluminum alloy inner conductor layer and a copper alloy stranded wire outer conductor layer to form a copper-clad aluminum conductor structure. The aluminum alloy part replaces the copper alloy conductor, which greatly reduces the preparation cost and realizes the preparation of lightweight cables. The copper alloy stranded wire outer conductor layer is tightly wrapped around the aluminum alloy inner conductor layer. The conductor structure is tight, which inhibits wire breakage and ensures good electrical properties of the conductor. The semi-conductive nylon tape is wrapped to prevent the structure from being loose, which helps prevent the insulation layer from penetrating into the copper stranded wire outer conductor layer and causing adhesion. At the same time, it effectively protects the insulation layer, prolongs the service life, and has better durability.

[0019] 4. The use of polyether polyurethane inner and outer sheath layer structure helps to improve the softness of the cable. The addition of Kevlar fiber braided layer, Kevlar wire has high strength, high modulus, better flexibility, helps to improve the softness and bending resistance of the cable, and protects the sheath layer. While taking into account the flexibility of the cable, it helps to avoid cable twisting and deformation, reduce safety hazards, better durability and application, and extend service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional structure diagram of a specific implementation method of the present application.

[0021] In the figure: 1-power line core, 2-control line core, 3-TPU elastomer inner layer vibration damping core tube, 4-TPU elastomer outer layer vibration damping core tube, 5-steel wire reinforcement core, 6-polyester staple fiber buffer core, 7-power conductor, 8-semi-conductive nylon sheath, 9-polyvinyl chloride insulation layer, 10-aluminum alloy inner conductor layer, 11-copper alloy stranded wire outer conductor layer, 12-polyester staple fiber filling core, 13-fine aluminum stranded wire inner conductor layer, 14-thick copper stranded wire outer conductor layer, 15-XLPE insulation layer, 16-semi-conductive PET resin sheath, 17-ETFE resin sheath anti-friction layer, 18-polyether polyurethane inner sheath, 19-Kevlar fiber braided layer, 20-polyether polyurethane outer sheath. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0023] like Figure 1As shown, the lightweight vibration-damping anti-bending garbage hanging drum cable of the embodiment of the utility model comprises four power cores 1 and two star-twisted control cores 2 arranged around the inner layer vibration-damping core tube 3 of the TPU elastomer and twisted together with the outer layer vibration-damping core tube 4 of the TPU elastomer to form a cable core, wherein the inner layer vibration-damping core tube 3 of the TPU elastomer is provided with a steel wire reinforcement core 5, and further, the steel wire reinforcement core 5 is formed by twisting a plurality of polyester short fiber bundles with galvanized steel wires. The outer layer vibration-damping core tube 4 of the TPU elastomer is provided with a polyester short fiber buffer core 6.

[0024] The power line core 1 includes a power conductor 7, a semi-conductive nylon sheath 8 and a polyvinyl chloride insulation layer 9. The power conductor 7 includes an aluminum alloy inner conductor layer 10 formed by twisting a plurality of aluminum alloy wires, and a plurality of copper alloy strands are twisted around the outside of the aluminum alloy inner conductor layer 10 to form a copper alloy stranded wire outer conductor layer 11. Specifically, the diameter of the aluminum alloy wire is 0.08 mm to 0.15 mm, the diameter of the copper alloy strand is 0.1 mm to 0.5 mm, and the twist direction of the aluminum alloy wire is opposite to that of the copper alloy stranded wire.

[0025] The control wire core 2 includes four insulating wire cores and several polyester short fiber filling cores 12 twisted together to form a wire core body, the insulating wire core includes a thin aluminum stranded wire inner conductor layer 13, and several thick copper stranded wires are twisted around the outside of the thin aluminum stranded wire inner conductor layer 13 to form a thick copper stranded wire outer conductor layer 14. Specifically, the thin aluminum stranded wire inner conductor layer 13 is composed of several aluminum alloy single wires with a wire diameter of 0.04mm to 0.08mm coaxially twisted, and the thick copper stranded wire is composed of several copper alloy single wires with a wire diameter of 0.1mm to 0.2mm coaxially twisted. Furthermore, the thin aluminum stranded wire inner conductor layer 13 and the thick copper stranded wire outer conductor layer 14 have the same twisting direction, and the thick copper stranded wire outer conductor layer 14 has a greater twisting length than the thin aluminum stranded wire inner conductor layer 13. The outer conductor layer 14 of the thick copper stranded wire is coated with an XLPE insulation layer 15. The outer part of the wire core is coated with a semi-conductive PET resin wrapping layer 16. In one embodiment, the semi-conductive nylon wrapping layer 8 is a semi-conductive nylon tape overlapping wrapping structure, and the winding direction of the semi-conductive nylon wrapping layer 8 is opposite to the twisting direction of the copper alloy stranded wire outer conductor layer 11. Furthermore, the overlap rate of the semi-conductive nylon tape is one quarter to one half of the width of the semi-conductive nylon tape.

[0026] The cable core is coated with an ETFE resin wrapped anti-friction layer 17, a polyether polyurethane inner sheath layer 18, a Kevlar fiber braided layer 19 and a polyether polyurethane outer sheath layer 20 in sequence. Furthermore, the outer surface of the polyether polyurethane inner sheath layer 18 and the inner surface of the polyether polyurethane outer sheath layer 20 are both provided with a thermoplastic EVA adhesive layer. In one embodiment, the ETFE resin wrapped anti-friction layer 17 is a gap wrapped layer and the winding pitch is 2 to 4 times the bandwidth. In one embodiment, the Kevlar fiber braided layer 19 is a double-layer Kevlar wire inner and outer layers that are mutually reverse spirally wound and the braiding density is not less than 95%.

[0027] The present invention is described by way of embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the claims of this application belong to the scope of protection of the present invention.

Claims

1. Lightweight vibration-damping anti-bending garbage hanging drum cable, characterized by: The invention comprises four power line cores (1) and two star-twisted control line cores (2) which are arranged around a TPU elastomer inner layer vibration-damping core tube (3) and twisted together with a TPU elastomer outer layer vibration-damping core tube (4) to form a cable core; the inner sleeve of the TPU elastomer inner layer vibration-damping core tube (3) is provided with a steel wire reinforcement core (5); the inner sleeve of the TPU elastomer outer layer vibration-damping core tube (4) is provided with a polyester short fiber buffer core (6); the power line core (1) comprises a power conductor (7), a semi-conductive nylon sheath (8) and a polyvinyl chloride insulation layer (9); the power conductor (7) comprises an aluminum alloy inner conductor layer (10) formed by twisting a plurality of aluminum alloy wires; a plurality of copper alloy strands are twisted around the outside of the aluminum alloy inner conductor layer (10) to form a copper alloy stranded wire. The control wire core (2) comprises four insulating wire cores and a plurality of polyester short fiber filling cores (12) twisted together to form a wire core body, the insulating wire core comprises a thin aluminum stranded wire inner conductor layer (13), a plurality of thick copper stranded wires are twisted around the thin aluminum stranded wire inner conductor layer (13) to form a thick copper stranded wire outer conductor layer (14), the thick copper stranded wire outer conductor layer (14) is coated with an XLPE insulation layer (15) on the outside, the wire core body is coated with a semi-conductive PET resin sheath (16), and the cable core is coated with an ETFE resin sheath anti-friction layer (17), a polyether polyurethane inner sheath layer (18), a Kevlar fiber braided layer (19) and a polyether polyurethane outer sheath layer (20) on the outside in sequence.

2. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The diameter of the aluminum alloy wire is 0.08 mm to 0.15 mm, the diameter of the copper alloy stranded wire is 0.1 mm to 0.5 mm, and the twisting direction of the aluminum alloy wire is opposite to that of the copper alloy stranded wire.

3. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The thin aluminum stranded wire inner conductor layer (13) is composed of a plurality of aluminum alloy single wires with a wire diameter of 0.04 mm to 0.08 mm coaxially twisted together, and the thick copper stranded wire is composed of a plurality of copper alloy single wires with a wire diameter of 0.1 mm to 0.2 mm coaxially twisted together.

4. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The thin aluminum stranded wire inner conductor layer (13) and the thick copper stranded wire outer conductor layer (14) are twisted in the same direction, and the thick copper stranded wire outer conductor layer (14) has a twist pitch greater than the twist pitch of the thin aluminum stranded wire inner conductor layer (13).

5. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The semi-conductive nylon wrapping layer (8) is a semi-conductive nylon tape overlapping wrapping structure, and the winding direction of the semi-conductive nylon wrapping layer (8) is opposite to the twisting direction of the copper alloy stranded wire outer conductor layer (11).

6. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 5 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 vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The steel wire reinforcement core (5) is formed by twisting a plurality of polyester short fiber bundles and galvanized steel wires.

8. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The ETFE resin-wrapped anti-friction layer (17) is intermittently wound, and the winding distance is 2 to 4 times the bandwidth.

9. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The Kevlar fiber braided layer (19) is a braided structure in which inner and outer double layers of Kevlar wires are mutually spirally wound in opposite directions, and the braiding density is not less than 95%.

10. The lightweight vibration-damping anti-bending garbage hanging drum cable according to claim 1 is characterized by: The outer surface of the polyether polyurethane inner sheath layer (18) and the inner surface of the polyether polyurethane outer sheath layer (20) are both provided with a thermoplastic EVA adhesive layer.

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