High temperature resistant, oil resistant, flexible, halogen-free, flame retardant cable

Abstract

The utility model discloses a kind of high-temperature-resistant oil-resistant flexible halogen-free flame-retardant cable, comprising: four power core wires and two control core wires, power insulation layer and control insulation layer are respectively extruded and covered on control conductor, winding shielding layer is arranged on control core wire, wrapping tape is reversely wrapped on winding shielding layer, four power core wires and two control core wires are twisted into cable with center filling rope group as center circle, the center filling rope group includes: PP net filling rope and support sleeve, PP net filling rope is sleeved in support sleeve after being wound into column, wrapping has cotton paper on the power core wire and control core wire of cable, woven shielding layer is woven on cotton paper, two layers of longitudinal wrapping tape are longitudinally wrapped on woven shielding layer, the sheath made of modified TPU is extruded and covered on the outermost longitudinal wrapping tape, silicon oil-resistant layer is coated on sheath. Make cable simultaneously possess halogen-free, high-temperature-resistant, oil-resistant, high-flame-retardant and high-flexibility etc.

Description

Technical Field

[0001] This utility model relates to the field of cables, and in particular to a high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable. Background Technology

[0002] The application of automated equipment is becoming increasingly widespread across various fields. The use of automated equipment inevitably requires cables for data and power transmission. In oily environments, cables with good oil resistance are needed to prevent corrosion from oil. Prolonged contact between cables and oil can cause cracking, affecting cable performance, shortening cable lifespan, and even causing data or power transmission interruptions, leading to short circuits and equipment damage. Currently, cables on the market either use modified PVC for insulation or sheathing, which is relatively low-cost and has moderate oil resistance, but its temperature resistance is usually limited to 70-90℃; or they use nitrile rubber, which has better oil resistance and a temperature resistance of 80-105℃, but is harder than conventional cables, has a larger bending radius, and lower abrasion resistance; or they use fluoroplastics, which have good oil resistance and a temperature resistance exceeding 150℃, but are more expensive and produce toxic halogen gases when burned, failing to meet environmental protection requirements. Therefore, conventional cables rarely simultaneously achieve halogen-free, flame-retardant, flexible, and oil-resistant properties. Utility Model Content

[0003] The purpose of this invention is to provide a high-temperature resistant, oil-resistant, flexible, halogen-free, and flame-retardant cable with a composite shielding structure that simultaneously possesses high temperature resistance, oil resistance, halogen-free properties, and high flexibility.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, comprising: four power core wires and two control core wires. Power insulation layers and control insulation layers made of cross-linked modified thermoplastic polyester composites are extruded onto the power conductors of the power core wires and the control conductors of the control core wires, respectively. A wound shielding layer is wound around the control core wires, and wrapping tape is wrapped around the wound shielding layer in the opposite direction. The four power core wires and two control core wires are twisted into a cable around a central filling rope group. The central filling rope group includes: a PP mesh filling rope and a support sleeve made of cross-linked modified thermoplastic polyester composite. The PP mesh filling rope is wound into a column shape and then fitted into the support sleeve. Cotton paper is wrapped around the cabled power core wires and control core wires. A braided shielding layer is woven onto the cotton paper. Two layers of longitudinal wrapping tape are longitudinally wrapped onto the braided shielding layer. A sheath made of modified TPU is extruded onto the outermost longitudinal wrapping tape. An oil-resistant silicone layer is coated onto the sheath.

[0005] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free flame-retardant cable, the thickness of the silicone oil-resistant layer is 20–30 μm.

[0006] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, the outer diameter of the power core wire is the same as the outer diameter of the control core wire after it is wrapped with a shielding layer and a wrapping tape.

[0007] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, the power conductor is formed by regularly stranding 19 φ0.226mm tinned copper wires with a stranding ratio of 10 to 15, and the stranding ratio of each power conductor is different. The control conductor is formed by regularly stranding 19 φ0.183mm tinned copper wires with a stranding ratio of 10 to 15, and the stranding ratio of each control conductor is different. The stranding ratios of the control conductor and the power conductor are different.

[0008] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, the thickness of both the power insulation layer and the control insulation layer is 0.15–0.3 mm.

[0009] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, the winding shielding layer is made of φ0.1mm tin-plated copper wire, and the shielding density of the winding shielding layer is ≥95%.

[0010] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, the thickness of the liner is 0.02 mm, and the overlap rate is 25%.

[0011] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, the braided shielding layer is made of 128 φ0.15mm tin-plated copper wires woven together in a braided structure of 16 spindles × 8 wires / spindle, with a braiding angle of 45° and a braiding density of ≥85%.

[0012] Furthermore, in the aforementioned high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, both the wrapping tape and the longitudinal wrapping tape are made of non-woven fabric with a thickness of 40μm, and the longitudinal wrapping interfaces of the two layers of longitudinal wrapping tape are in relative positions.

[0013] The advantages of this utility model are as follows: the power insulation layer and control insulation layer made of cross-linked modified thermoplastic polyester composite, combined with the sheath made of modified TPU, and the coating of the sheath with a silicone oil-resistant layer can greatly improve the high temperature resistance, oil resistance and flame retardancy of the cable. The halogen content in the modified TPU material is ≤50ppm, which complies with the RoHS 3.0 standard. Moreover, the silicone oil-resistant layer does not contain halogens, so the sheath will not produce halogens when burning. The use of a wound shielding layer with a winding density of ≥95% and a braided shielding layer with a braiding density of ≥85% gives the cable excellent anti-interference performance across the entire frequency band. The structure of a central filling rope group, a control power core wire with an outer diameter that is the same as the outer diameter of the control core wire after the wound shielding layer, and a double-layer longitudinal wrapping tape improves the flexibility of the cable, giving it a smaller bending radius. The high temperature resistant, oil-resistant, flexible, halogen-free, and flame-retardant cable of this utility model has the characteristics of being halogen-free, high temperature resistant, oil-resistant, highly flame-retardant and highly flexible. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable described in this utility model. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figure 1As shown, the high-temperature resistant, oil-resistant, flexible halogen-free flame-retardant cable of this utility model includes: four power core wires 1 and two control core wires 2. The power conductors 11 in the power core wires 1 are formed by regularly stranding 19 φ0.226mm tinned copper wires with a stranding ratio of 10-15. The stranding ratio of each power conductor 11 is different. A power insulation layer 12 made of cross-linked modified thermoplastic polyester composite is extruded onto the power conductors 11. The control conductors 21 in the control core wires 2 are formed by regularly stranding 19 φ0.183mm tinned copper wires with a stranding ratio of 10-15. The stranding ratio of each control conductor 21 is different. The control conductor 21 has a different pitch ratio than the power conductor 11. A control insulation layer 22 made of cross-linked modified thermoplastic polyester composite is extruded onto the control conductor 21. The different pitch ratios result in different pitches between the power core wire 1 and the control core wire 2, reducing signal interference between the power core wire 1, between the control core wire 2, and between the power core wire 1 and the control core wire 2. The thickness of the power insulation layer 11 and the control insulation layer 21 is 0.15-0.3 mm. The cross-linked modified thermoplastic polyester composite is soft in texture and has extremely high oil resistance and high flame retardancy. The temperature resistance is increased to 120℃, the insulation elongation is ≥150%, and the insulation strength is ≥10.3 MPa. In the production process, the power insulation layer 12 and the control insulation layer 22, made of thermoplastic polyester composite, are first extruded onto the power conductor 11 and the control conductor 21, respectively. Then, the power insulation layer 12 and the control insulation layer 22 are irradiated with an irradiation dose of 50 to 80 kGy. After irradiation, the thermoplastic polyester composite will change to form a cross-linked modified thermoplastic polyester composite.

[0017] A shielding layer 23 is wound around the control core wire 2. The shielding layer 23 is made of 0.1mm tin-plated copper wire and has a shielding density of ≥95%. While ensuring a certain degree of flexibility, the high coverage improves the anti-interference capability of the control core wire 2. A wrapping tape 24 made of 40μm thick non-woven fabric is wrapped around the shielding layer 23 in the opposite direction. This reverse wrapping ensures that the shielding layer 23 fits tightly against the control core wire 2. The outer diameter of the power core wire 1 is the same as the outer diameter of the control core wire 2 after the shielding layer 23 and the wrapping tape 24 are applied. A uniform outer diameter improves roundness. Four power core wires 1 and two control core wires 2 are filled with a central rope group 3. For the central circumferential stranded cable, the central filler rope group 3 includes: a PP mesh filler rope 31 and a support sleeve 32 made of cross-linked modified thermoplastic polyester composite. The PP mesh filler rope 31 is wound into a column shape and then fitted into the support sleeve 32. When the control core wire 2 and the power core wire 1 are stranded, because the control core wire 2 has a wound shielding layer 23 and its hardness is higher than that of the power core wire 1, ordinary filler ropes cannot achieve a good filling effect and cannot provide effective support, which can easily cause non-roundness during cable formation. However, with the central filler rope group 3, the PP mesh filler rope 31 plays a tensile role, and the support sleeve 32 deforms and spreads into the gaps to fill them after being compressed, thus providing effective support. Figure 1The support sleeve 32 shown is shaped after compression, and it has a hollow structure with thin walls, so it does not affect the flexibility of the cable, ensuring that the roundness of the power core 1 and control core 2 after cabling reaches >95%. A 0.02mm thick cotton paper 4 is wrapped around the cabled power core 1 and control core 2, with an overlap rate of 25%, improving the flexibility of the cable. A braided shielding layer 5 is woven on the cotton paper 4. The braided shielding layer 5 is made of 128 φ0.15mm tinned copper wires woven in a 16-spindle × 8-wire / spindle braiding structure, with a braiding angle of 45° and a braiding density ≥85%, improving the overall shielding performance of the cable. Furthermore, the braided shielding layer 5, together with the wound shielding layer 23 on the control core wire 2, forms a composite shielding structure of total shielding + sub-shielding, giving the cable extremely high signal shielding performance across the entire frequency band. Two layers of longitudinal wrapping tape 6, each 40μm thick, are longitudinally wrapped around the braided shielding layer 5. The longitudinal wrapping interfaces of the two layers of tape 6 are positioned opposite each other. The double-layer longitudinal wrapping tape 6 improves the cable's flexibility, reducing its bending radius, and the relative position of the interfaces enhances the longitudinal wrapping stability of the double-layer tape 6. A sheath 7 made of modified TPU is extruded onto the outermost longitudinal wrapping tape 6. The modified TPU has a halogen content ≤50ppm, complying with RoHS. The cable meets the 3.0 standard, is resistant to long-term temperatures up to 105℃, oil, and hydrolysis, and also has high flame retardant properties. A 20-30μm thick silicone oil-resistant layer is coated on the sheath 7. The silicone oil-resistant layer can further improve the oil resistance and high temperature resistance of the sheath 7. The oil resistance meets the requirements of EN60811. The strength attenuation is ≤12%. The thickness is controlled at 20-30μm, which can achieve the protection effect without reducing the thermal conductivity of the cable due to excessive coating thickness, thus preventing heat accumulation inside the cable.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable, characterized in that: include: Four power cores and two control cores are cabled. Power insulation layers and control insulation layers made of cross-linked modified thermoplastic polyester composite are extruded onto the power conductors of the power cores and the control conductors of the control cores, respectively. A wound shielding layer is wound around the control cores, and wrapping tape is wrapped around the wound shielding layer in the opposite direction. The four power cores and two control cores are twisted into a cable around a central filler rope group. The central filler rope group includes a PP mesh filler rope and a support sleeve made of cross-linked modified thermoplastic polyester composite. The PP mesh filler rope is wound into a column shape and then fitted into the support sleeve. Cotton paper is wrapped around the cabled power and control cores, and a braided shielding layer is woven onto the cotton paper. Two layers of longitudinal wrapping tape are wrapped around the braided shielding layer. A sheath made of modified TPU is extruded onto the outermost longitudinal wrapping tape, and a silicone oil-resistant layer is coated onto the sheath.

2. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The thickness of the silicone oil-resistant layer is 20–30 μm.

3. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The outer diameter of the power core wire is the same as the outer diameter of the control core wire after the shielding layer and wrapping tape are installed.

4. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The power conductor is made of 19 φ0.226mm tinned copper wires twisted together in a regular manner, with a twist ratio of 10 to 15. The twist ratio of each power conductor is different. The control conductor is made of 19 φ0.183mm tinned copper wires twisted together in a regular manner, with a twist ratio of 10 to 15. The twist ratio of each control conductor is different. The twist ratios of the control conductor and the power conductor are different.

5. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The thickness of both the power insulation layer and the control insulation layer is 0.15–0.3 mm.

6. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The wound shielding layer is made of 0.1mm tin-plated copper wire, and the shielding density of the wound shielding layer is ≥95%.

7. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The thickness of the tissue paper is 0.02mm, and the overlap rate is 25%.

8. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: The braided shielding layer is made of 128 φ0.15mm tin-plated copper wires woven together in a braided structure of 16 spindles × 8 wires / spindle, with a braiding angle of 45° and a braiding density of ≥85%.

9. The high-temperature resistant, oil-resistant, flexible, halogen-free, flame-retardant cable according to claim 1, characterized in that: Both the wrapping strap and the longitudinal wrapping strap are made of non-woven fabric with a thickness of 40μm, and the longitudinal wrapping joints of the two layers of longitudinal wrapping straps are in opposite positions.

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