Electric wire capable of being used in low-temperature environment
By designing multi-layer twisted structures and low-temperature resistant materials in the wires, the problem of hardening and brittleness in the low-temperature environment is solved, and the effect of maintaining flexibility and wear resistance in the low-temperature environment is achieved, meeting the needs of robots for long-term and high-frequency operations.
Patent Information
- Application Number
- CN202510263264.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-05-27
AI Technical Summary
In low temperature environments, conventional wires tend to become hard and brittle, making it difficult to meet the needs of high-frequency bending operations, especially in robotic operations.
A wire including a core wire, a low-temperature elastic buffer layer, an inner protective layer, an outer shield layer, an outer protective layer and a low-temperature protective layer are designed. The wire ensures flexibility and wear resistance in low-temperature environments through the use of multi-layer twisted structure and low-temperature resistant materials.
The wire remains flexible in a low-temperature environment, improves its low-temperature shrinkage resistance, and forms a variety of grains on the surface when it is repeatedly bending and rubbing, significantly improving wear resistance and meeting the needs of robots for long-term and high-frequency operations.
Smart Images
Figure CN120048578A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a wire, and particularly to a wire that can be used in a low-temperature environment. Background Art
[0002] When operating in some special environments, due to the harsh environment, robots are gradually used for operation. The wires for robots need to be able to withstand the harsh environment, especially the low-temperature environment. In the low-temperature environment, conventional wires are prone to hardening and embrittlement, and it is difficult to meet the requirements of high-frequency bending operations in the low-temperature environment. Summary of the Invention
[0003] In order to overcome the above defects, the present invention provides a wire that can be used in a low-temperature environment. The wire that can be used in a low-temperature environment can remain flexible in the low-temperature environment and can meet the requirements of high-frequency operations of robots for a long time in the low-temperature environment.
[0004] The technical solution adopted by the present invention to solve its technical problems is: A wire that can be used in a low-temperature environment, including a core wire, a low-temperature resistant elastic buffer layer, an inner sheath, an outer shield layer, an outer sheath, and a low-temperature resistant protective layer. A plurality of core wires are stranded together to form a core wire stranding body. The inner sheath is sleeved outside the core wire stranding body. A low-temperature resistant elastic buffer material is filled between the core wire stranding body and the inner sheath to form a low-temperature resistant elastic buffer layer. A metal material is provided outside the inner sheath by weaving or wrapping to form an outer shield layer. An outer sheath with wear-resistant performance is formed outside the outer shield layer by extrusion. A low-temperature resistant material is coated on the surface of the outer sheath to form a low-temperature resistant protective layer.
[0005] As a further improvement of the present invention, the low-temperature resistant material includes the following components in parts by weight:
[0006] 50-80 parts by weight of ethylene-vinyl acetate copolymer, 10-40 parts by weight of rubber, 1-8 parts by weight of filler, 0.5-2 parts by weight of vulcanizing agent, 1-5 parts by weight of foaming agent, 1-5 parts by weight of antistatic agent, 2-8 parts by weight of coupling agent, and 0.05-0.5 parts by weight of lubricant.
[0007] As a further improvement of the present invention, the filler includes nano-silica, silicone powder, molybdenum disulfide, and silane coupling agent. The nano-silica: silicone powder: molybdenum disulfide = 1: 0.5-1.5: 0.5-1, and the silane coupling agent is 1-5% of the total weight of nano-silica, silicone powder, and molybdenum disulfide.
[0008] As a further improvement of the present invention, the outer protective layer includes a first outer protective layer, a protective net, and a second outer protective layer. The first outer protective layer is formed on the outside of the outer shielding layer by extrusion. The protective net is sleeved on the outside of the first outer protective layer. The second outer protective layer is formed on the outside of the protective net by extrusion and adhered to the first outer protective layer.
[0009] As a further improvement of the present invention, bulletproof wires are added among the several core wires, and the several core wires and the bulletproof wires are twisted together to form a core wire twisted body.
[0010] As a further improvement of the present invention, the core wire includes an insulating wire, a foamed elastomeric plastic, an inner shielding layer, and a Teflon tape layer. Several insulating wires are twisted around the outside of the net-shaped foamed elastomeric plastic to form a twisted wire. A metal material is arranged on the outside of the twisted wire by braiding or wrapping to form an inner shielding layer. The Teflon tape is wrapped around the outside of the inner shielding layer to form a Teflon tape layer.
[0011] As a further improvement of the present invention, the insulating wire includes a wire made of a conductive material, an elastic wire, a fluoroplastic tape, and an insulating skin. Several wires and the elastic wire are twisted together to form a multi-core twisted wire. The smooth fluoroplastic tape is tightly wound around the outside of the multi-core twisted wire. The insulating skin is formed on the outside of the fluoroplastic tape by extrusion.
[0012] As a further improvement of the present invention, the wire is a single copper-tin alloy conductor with a wire diameter of 0.05 mm to 0.10 mm; the insulating skin is made of cross-linked polyethylene material.
[0013] As a further improvement of the present invention, talcum powder is added to the core wire twisted body.
[0014] As a further improvement of the present invention, a non-woven fabric layer is wrapped around the outside of the core wire twisted body, and a low-temperature resistant elastic buffer layer is arranged on the outside of the non-woven fabric layer.
[0015] The beneficial effects of the present invention are as follows: By arranging a low-temperature resistant protective layer on the outside of the wire, the present invention can keep the wire flexible in a low-temperature environment, improve the low-temperature shrinkage performance of the wire, and the low-temperature resistant protective layer of the present invention can also generate a variety of crystal grains during repeated bending and friction in a low-temperature environment, greatly improving the wear resistance of the wire surface. The core wire of the wire of the present invention adopts a multi-layer twisting method, and a low-temperature resistant elastic material is added during twisting, making the wire more elastic and not damaged during repeated bending and pulling. The wire of the present invention has the characteristics of being flexible, wear-resistant, and tensile in a low-temperature environment, and can meet the requirements of long-term operation of robots in a low-temperature environment. Description of the Drawings
[0016] Figure 1 It is a schematic structural principle diagram of the present invention;
[0017] Figure 2 Schematic diagram of the core wire structure principle of the present invention;
[0018] Figure 3 Schematic diagram of the insulating wire structure principle of the present invention. Specific embodiments
[0019] Example: A wire that can be used in a low-temperature environment, including a core wire 1, a low-temperature resistant elastic buffer layer 2 (such as Perlast ICE G75LT elastomer has long-term low-temperature flexibility in a low-temperature environment, and the cross-section expands very little, VMQ (methyl vinyl silicone rubber) has good low-temperature flexibility in a working environment with a minimum temperature of -60°C, and FKM (fluororubber) material also has good low-temperature resistance), an inner sheath 3, an outer shielding layer 4, an outer sheath, and a low-temperature resistant protective layer 5. A plurality of core wires 1 are stranded together to form a core wire 1 stranded body. The inner sheath 3 is sleeved on the outside of the core wire 1 stranded body. The low-temperature resistant elastic buffer material is filled between the core wire 1 stranded body and the inner sheath 3 to form the low-temperature resistant elastic buffer layer 2. The metal material is arranged on the outside of the inner sheath 3 by braiding or wrapping to form the outer shielding layer 4. A wear-resistant outer sheath is formed on the outside of the outer shielding layer 4 by extrusion. A layer of low-temperature resistant material is coated on the surface of the outer sheath to form the low-temperature resistant protective layer 5.
[0020] In the present invention, a low-temperature resistant elastic buffer material is filled between the core wire 1 and the inner sheath. In a low-temperature environment, the core wire 1 is provided with buffer protection by the low-temperature resistant elastic buffer layer 2 to avoid damage to the core wire 1 caused by collision with hard objects such as the ground. Moreover, the present invention also forms a low-temperature resistant protective layer 5 on the outside of the outer sheath. The low-temperature resistant anti-slip layer can resist the low-temperature environment. In a low-temperature environment, it will not shrink and crack, nor become brittle and damaged. It can insulate and protect the internal wire, avoiding damage to the internal wire.
[0021] The low-temperature resistant material includes the following components in parts by weight:
[0022] 50 - 80 parts by weight of ethylene-vinyl acetate copolymer, 10 - 40 parts by weight of rubber, 1 - 8 parts by weight of filler, 0.5 - 2 parts by weight of vulcanizing agent, 1 - 5 parts by weight of foaming agent, 1 - 5 parts by weight of antistatic agent, 2 - 8 parts by weight of coupling agent, and 0.05 - 0.5 parts by weight of lubricant. As the main component, ethylene-vinyl acetate copolymer has good filler compatibility, crosslinkability, low-temperature resistance, impact toughness, environmental stress cracking resistance, and high chemical resistance. It also has good elasticity and flexibility itself. After adding rubber, its flexibility can be improved, making the low-temperature resistant material more tough. The above materials are mixed and foamed to have characteristics such as good elasticity, light weight, toughness, and low shrinkage rate, which can fully protect the internal wire and avoid damage to the internal wire by the external harsh environment.
[0023] The filler includes nano-silica, silicone powder, molybdenum disulfide and a silane coupling agent. The ratio of nano-silica:silicone powder:molybdenum disulfide is 1:0.5 - 1.5:0.5 - 1, and the silane coupling agent accounts for 1 - 5% of the total weight of nano-silica, silicone powder and molybdenum disulfide. The silane coupling agent combines with nano-silica, silicone powder and molybdenum disulfide to form a mixed filler, which can promote the formation of a very large number of conventional grains in ethylene-vinyl acetate copolymer. These large grains can significantly increase the wear resistance of the low-temperature protection layer 5.
[0024] The outer protective layer includes a first outer protective layer 6, a protective net 7 and a second outer protective layer 8. The first outer protective layer 6 is formed on the outside of the outer shielding layer 4 by extrusion. The protective net 7 is sleeved on the outside of the first outer protective layer 6, and the second outer protective layer 8 is formed on the outside of the protective net 7 by extrusion and bonded to the first outer protective layer 6. The protective net 7 woven from an elastic material is sleeved on the outside of the first outer protective layer 6, and then the second outer protective layer 8 is extruded. The first outer protective layer 6 and the second outer protective layer 8 are preferably made of high-strength polyurethane material. When the second outer protective layer 8 is extruded, it will tightly adhere to the first outer protective layer 6 through the gaps of the protective net 7 and cannot be torn apart. This outer protective layer can greatly improve the tensile and anti-twisting capabilities of the wire outer protective layer, protecting the outer protective layer of the wire from displacement and stretching during the long-term movement with the robot, so that the entire very long wire will not twist or have other problems during dragging.
[0025] Aramid filaments 9 are added among the several core wires 1, and the several core wires 1 and the aramid filaments 9 are twisted together to form a core wire twist assembly.
[0026] The core wire 1 includes an insulating wire 10, a foamed elastomeric plastic 11, an inner shielding layer 12 and a Teflon tape layer 13. Several insulating wires 10 are twisted around the outside of the net-shaped foamed elastomeric plastic 11 to form a stranded wire. A metal material is arranged on the outside of the stranded wire by weaving or wrapping to form the inner shielding layer 12, and a Teflon tape is wrapped around the outside of the inner shielding layer 12 to form the Teflon tape layer 13.
[0027] A net-shaped foamed elastomeric plastic is filled in the centers of the several insulating wires 10, and then twisting is carried out. After each insulating wire 10 is twisted around the foamed elastomeric plastic, the net-shaped foamed elastomeric plastic can ensure the structural stability of the entire wire and also provide a certain elastic buffer when the entire wire is bent and squeezed at the center.
[0028] The insulating wire 10 includes a wire 14 made of a conductive material, an elastic wire 15, a fluoroplastic tape 16, and an insulating skin 17. A plurality of wires 14 and the elastic wire 15 are twisted to form a multi-core twisted wire. The smooth fluoroplastic tape 16 is tightly wound around the outside of the multi-core twisted wire, and the insulating skin 17 is formed on the outside of the fluoroplastic tape 16 by extrusion. The elastic wire 15 is twisted together with the wire 14. The elastic wire 15 can protect the wire 14 and make the twisted wire have better elasticity and wear resistance, avoiding wear and damage between adjacent wires 14. After the wire 14 and the elastic wire 15 are twisted, a layer of fluoroplastic tape 16 is wrapped around them, which can reduce the dispersion of the twisted wire formed by the wire 14 and the elastic wire 15, and at the same time reduce the wear of the wire 14 and protect the wire 14 from damage.
[0029] The wire 14 is a copper-tin alloy conductor with a single wire diameter of 0.05 mm to 0.10 mm. The tensile strength of this alloy conductor is much higher than that of ordinary pure copper or tinned copper, which can improve the anti-torsion ability of the conductor. The insulating skin 17 is made of cross-linked polyethylene material. This insulating skin 17 has excellent comprehensive properties such as mechanical properties, environmental stress cracking resistance, chemical resistance, anti-creep property, and electrical properties.
[0030] Talc powder is added to the core wire 1 twisted body. Talc powder is a very good powdery lubricant. By adding a small amount of talc powder to the core wire 1 twisted body, the mutual friction between each core wire 1 can be greatly reduced.
[0031] A non-woven fabric layer 18 is wound around the outside of the core wire 1 twisted body, and a low-temperature resistant elastic buffer layer 2 is arranged outside the non-woven fabric layer 18. After the core wire 1 is twisted, a non-woven fabric with very high strength is wound around to prevent each core wire 1 from spreading. When filling the low-temperature resistant elastic buffer material between the inner protection layer 3 and the non-woven fabric layer 18, the low-temperature resistant elastic buffer will not enter the gap between the core wires 1 to squeeze the core wires 1.
[0032] The wires made of this application are tested at -100 °C, -150 °C, and -200 °C respectively, and the test results are as follows:
[0033] The wire is subjected to simulated robot actions at -100 °C, with repeated bending and stretching tests. For the wire surface layer: no cracking or powdering; for the whole wire: no cracking or powdering; the wire surface wear amount is: 32 mg; the wire anti-electromagnetic interference level: SE-1; the wire tensile strength: 45.6 / MPa;
[0034] The wire is subjected to simulated robot actions at -150 °C, with repeated bending and stretching tests. For the wire surface layer: no cracking or powdering; for the whole wire: no cracking or powdering; the wire surface wear amount is: 35 mg; the wire anti-electromagnetic interference level: SE-1; the wire tensile strength: 44.5 / MPa;
[0035] The wire was subjected to simulated robot movements at -200°C, and repeated bending and stretching tests were carried out. For the wire surface layer: there were no cracks or powdering; for the whole wire: there were no cracks or powdering; the wear amount of the wire surface was 36 mg; the anti-electromagnetic interference level of the wire was SE-1; the tensile strength of the wire was 42.5 / MPa.
[0036] The above experimental data show that the wire of the present invention has good low-temperature resistance and can maintain good wear resistance, anti-electromagnetic interference performance and good tensile strength in an ultra-low temperature environment.
Claims
1. An electric wire that can be used in a low temperature environment, characterized in that: The invention comprises a core wire (1), a low-temperature resistant elastic buffer layer (2), an inner protective layer (3), an outer shielding layer (4), an outer protective layer and a low-temperature resistant protective layer (5), wherein a plurality of core wires are twisted together to form a core wire twisted body, the inner protective layer is sleeved on the outside of the core wire twisted body, a low-temperature resistant elastic buffer material is filled between the core wire twisted body and the inner protective layer to form a low-temperature resistant elastic buffer layer, a metal material is arranged on the outside of the inner protective layer by weaving or wrapping to form an outer shielding layer, a layer of outer protective layer with wear resistance is formed on the outside of the outer shielding layer by extrusion, and a layer of low-temperature resistant material is coated on the surface of the outer protective layer to form a low-temperature resistant protective layer.
2. The electric wire usable in a low temperature environment according to claim 1, characterized in that: The low temperature resistant material comprises the following components in parts by weight: 50-80 parts by weight of ethylene-vinyl acetate copolymer, 10-40 parts by weight of rubber, 1-8 parts by weight of filler, 0.5-2 parts by weight of vulcanizing agent, 1-5 parts by weight of foaming agent, 1-5 parts by weight of antistatic agent, 2-8 parts by weight of coupling agent and 0.05-0.5 parts by weight of lubricant.
3. The electric wire usable in a low temperature environment according to claim 2, characterized in that: The filler comprises nano silicon dioxide, silicone powder, molybdenum disulfide and silane coupling agent, wherein the ratio of nano silicon dioxide: silicone powder: molybdenum disulfide is 1:0.5-1.5:0.5-1, and the silane coupling agent accounts for 1-5% of the total weight of nano silicon dioxide, silicone powder and molybdenum disulfide.
4. The electric wire usable in a low temperature environment according to claim 1, characterized in that: The outer protective layer comprises a first outer protective layer (6), a protective net (7) and a second outer protective layer (8), wherein the first outer protective layer is formed on the outer side of the outer shielding layer by extrusion, the protective net is sleeved on the outer side of the first outer protective layer, and the second outer protective layer is formed on the outer side of the protective net by extrusion and is bonded to the first outer protective layer.
5. The electric wire usable in a low temperature environment according to claim 1, characterized in that: A bulletproof wire (9) is added between the plurality of core wires, and the plurality of core wires and the bulletproof wire are twisted together to form a core wire twisted body.
6. The electric wire usable in a low temperature environment according to claim 1, characterized in that: The core wire comprises an insulating wire (10), a foamed elastic plastic (11), an inner shielding layer (12) and a Teflon tape layer (13); a plurality of insulating wires are twisted around the outside of the meshed foamed elastic plastic to form a twisted wire; a metal material is arranged on the outside of the twisted wire by weaving or wrapping to form an inner shielding layer; and the Teflon tape is wrapped around the outside of the inner shielding layer to form a Teflon tape layer.
7. The electric wire usable in a low temperature environment according to claim 6, characterized in that: The insulated wire comprises a conductor (14) made of a conductive material, an elastic wire (15), a fluoroplastic tape (16) and an insulating skin (17); a plurality of conductors and the elastic wire are twisted together to form a multi-core twisted wire; a smooth fluoroplastic tape is tightly wound around the outside of the multi-core twisted wire; and the insulating skin is formed on the outside of the fluoroplastic tape by extrusion.
8. The electric wire usable in a low temperature environment according to claim 7, characterized in that: The wire is a copper-tin alloy conductor with a single wire diameter of 0.05mm-0.10mm; the insulation skin is a cross-linked polyethylene material.
9. The electric wire usable in a low temperature environment according to claim 1, characterized in that: Talc powder is added into the core wire twisted body.
10. The electric wire usable in a low temperature environment according to claim 1, characterized in that: The core wire twisted body is wrapped with a non-woven fabric layer (18) on the outside, and a low-temperature resistant elastic buffer layer is arranged on the outside of the non-woven fabric layer.