Cold-resistant environment-friendly cable at temperature of 52 DEG C below zero

Abstract

The invention discloses a-52 DEG C cold-resistant environment-friendly cable, relates to the technical field of cables, and solves the problem that a cold-resistant environment-friendly cable in the prior art is easy to crack and crack in a low-temperature environment. Comprising a wire core structure, the nylon sheath wire core structure comprises a plurality of conductors distributed in an array, an insulating layer wrapping each conductor and a metal shielding layer wrapping each insulating layer, and each nylon sheath conductor is a tinned copper conductor; the nylon sheath metal shielding layer comprises an inner metal layer and an outer metal layer, the nylon sheath inner metal layer is arranged outside the insulating layer, and the nylon sheath outer metal layer is arranged outside the inner metal layer; the cable also comprises an outer sheath which wraps the cable core structure, and the nylon sheath is made of a thermoplastic elastomer. According to the cable scheme, on one hand, the flexibility, the mechanical strength and the environmental protection performance of the cable can be improved while a low-temperature environment is considered, and on the other hand, the influence of low temperature on data transmission of the cable can be effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to a -52°C cold-resistant and environment-friendly cable. Background Art

[0002] With the rapid development of my country's economy, the application areas of wires and cables are becoming increasingly extensive, and their use in extremely cold regions is also increasing. To ensure the safety of cable laying and installation in extremely cold environments, as well as stable and reliable operation during operation, cables must have excellent cold resistance.

[0003] Currently, the insulation layer of existing cold-resistant, environmentally friendly cables is mostly made of conventional polyvinyl chloride. This material performs poorly in low-temperature environments and is prone to cracking. This is because the heat generated by the operation of wires and cables causes the internal temperature to be higher than the external temperature. When the ambient temperature is moderate, the temperature difference between the inside and outside of the cable is small, and the resulting deformation is within the tolerable range. However, in low-temperature environments, the outer sheath becomes more brittle due to the low temperature. Furthermore, the temperature difference between the inner and outer surfaces of the outer sheath is significant, resulting in significant deformation caused by thermal expansion and contraction, which can ultimately lead to cracking of the outer sheath.

[0004] In summary, the cold-resistant and environmentally friendly cables in the prior art have the problem of being prone to cracking and breaking in low-temperature environments. Summary of the Invention

[0005] The present invention provides a -52°C cold-resistant and environment-friendly cable, which can solve the problem that the cold-resistant and environment-friendly cables in the prior art are prone to cracking and breaking in a low-temperature environment.

[0006] To achieve the above object, according to an embodiment of the first aspect of the present invention, a -52°C cold-resistant and environmentally friendly cable is provided, comprising a core structure, wherein the core structure includes a plurality of conductors distributed in an array, an insulation layer wrapped around the outside of each conductor, and a metal shielding layer wrapped around the outside of the insulation layer, wherein each of the conductors is a tinned copper conductor; The metal shielding layer includes an inner metal layer and an outer metal layer, wherein the inner metal layer is arranged outside the insulating layer, and the outer metal layer is arranged outside the inner metal layer; Also includes: An outer sheath, wrapped around the outside of the wire core structure, wherein the outer sheath is made of thermoplastic elastomer; A functional layer is provided between the outer sheath and the metal shielding layer, the functional layer comprising a thermal insulation layer, a heat conducting layer, a heating layer and a reinforcement layer; The thermal insulation layer includes an inner thermal insulation layer and an outer thermal insulation layer. The inner thermal insulation layer is wrapped around the outside of the outer metal layer. The outer thermal insulation layer is arranged between the inner side of the outer sheath and the outer side of the reinforcement layer. The heat conductive layer is wrapped around the outside of the inner thermal insulation layer. The heating layer is arranged between the outer side of the heat conductive layer and the inner side of the reinforcement layer.

[0007] A further improvement is that the thermal insulation inner layer and the thermal insulation outer layer, the thermal insulation inner layer is made of EPDM rubber material, and the thermal insulation outer layer is a layer of non-woven fabric tape, which is wrapped around the outside of the reinforcement layer by wrapping.

[0008] A further improvement is that the inner metal layer is composed of a composite strip formed by hot pressing an inner copper layer and a polyester film, and the outer metal layer is tightly wrapped around the outside of the inner metal layer using a stainless steel braided mesh.

[0009] A further improvement is that a buffer layer is provided between the insulating layer and the inner metal layer, and the buffer layer is wrapped around the outside of the insulating layer.

[0010] A further improvement is that the heating layer is a soft heating sheet tightly wrapped around the outside of the heat conducting layer.

[0011] A further improvement is that the reinforcement layer is made of aramid fiber.

[0012] A further improvement is that it also includes a protective outer layer, which includes a nylon sheath and a waterproof layer. The waterproof layer is a layer of aluminum-plastic composite tape tightly wrapped around the outside of the outer sheath, and the nylon sheath is coated with a layer of hot-melt adhesive coating.

[0013] A further improvement is that the protective outer layer further comprises a coating layer, and the coating layer comprises an inner layer and an outer layer; The inner layer is a low-temperature anti-cracking coating, and the outer layer is a super-hydrophobic anti-icing coating.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention is designed with a functional layer consisting of an insulation layer, a heat-conducting layer, a heating layer and a reinforcement layer, which is arranged between the outer sheath and the metal shielding layer. The insulation layer adopts a double-layer design of an insulation inner layer and an insulation outer layer. The insulation inner layer is made of EPDM rubber, and the insulation outer layer is a layer of non-woven fabric tape, which is wrapped around the outside of the reinforcement layer by wrapping. On the one hand, while taking into account the low temperature environment, it can also improve the flexibility, mechanical strength and environmental performance of the cable and prevent the cable from cracking and breaking. On the other hand, the heating layer is a layer of soft heating plate tightly wrapped around the outside of the heat-conducting layer. When the cable is used in a cold environment, the soft heating plate can be used to appropriately heat the inside of the cable to keep the temperature difference between the inside and outside of the cable within a certain temperature range, effectively avoiding the impact of low temperature on the data transmission of the cable.

[0015] (2) The present invention uses a nylon sheath, a waterproof layer, and a coating layer as a protective outer layer, which is wrapped around the outer sheath of the cable. The nylon sheath is wrapped around the outside of the hot-melt adhesive coating. The nylon sheath is made of high-strength nylon material, which has high hardness and wear resistance and can effectively resist the gnawing of rodents. At the same time, the nylon material also has good flexibility and chemical corrosion resistance. The nylon sheath is coated with a layer of hot-melt adhesive coating, which melts after heating to form a sealing layer. It is combined with an aluminum-plastic composite tape for high-efficiency waterproofing to prevent the internal insulation layer of the cable from being hydrolyzed or the metal shielding layer from being corroded after water ingress. The coating layer includes an inner layer and an outer layer. The inner layer is a low-temperature anti-cracking coating, which is a nano-silicone rubber composite material. The outer layer is a super-hydrophobic anti-icing coating. The inner layer provides basic flexibility, and the outer layer withstands surface wear, thereby improving the flexibility of the entire cable.

[0016] (3) The present invention designs each conductor in the core structure inside the cable as a tinned copper conductor. The tinned layer can reduce the oxidation of the copper conductor surface, reduce signal attenuation, improve high-frequency performance, and ensure stable signal transmission. The insulation layer is made of thermoplastic elastomer, which has both rubber flexibility and plastic processability. It can still maintain elasticity in low-temperature environments and avoid brittleness or cracking of the insulation layer. The metal shielding layer includes an inner metal layer and an outer metal layer. The inner metal layer is arranged on the outside of the insulation layer and is composed of a composite tape formed by hot pressing the inner layer copper and polyester film. The outer metal layer is arranged on the outside of the inner metal layer and is tightly wrapped with a stainless steel braided mesh on the outside of the inner metal layer. The double-layer design of the metal shielding layer can, on the one hand, improve the impact resistance and wear resistance of the cable and protect the internal insulation layer of the cable from external damage; on the other hand, it can reduce high-frequency interference and ensure the stability and accuracy of data transmission. A buffer layer is provided between the insulation layer and the inner metal layer. The buffer layer is wrapped around the outside of the insulation layer and is made of foamed polyethylene. This has excellent buffering performance, reduces the weight of the cable, protects the core structure, alleviates the extrusion or impact of the metal shielding layer on the core structure, prevents damage to the insulation layer or conductor, and thus extends the service life of the entire cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the cable of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the cable of the present invention.

[0018] Markings in the figure: 1. Wire core structure; 11. Conductor; 12. Insulation layer; 13. Metal shielding layer; 131. Inner metal layer; 132. Outer metal layer; 14. Buffer layer; 2. Outer sheath; 3. Functional layer; 31. Insulation layer; 311. Insulation inner layer; 312. Insulation outer layer; 32. Thermal conductive layer; 33. Heating layer; 34. Reinforcement layer; 4. Protective outer layer; 41. Nylon sheath; 42. Waterproof layer; 43. Paint layer; 401. Inner layer; 402. Outer layer. DETAILED DESCRIPTION

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1 and Figure 2 As shown, a -52°C cold-resistant and environmentally friendly cable includes a core structure 1, which includes a plurality of conductors 11 distributed in an array, an insulating layer 12 wrapped around the outside of each conductor 11, and a metal shielding layer 13 wrapped around the outside of the insulating layer 12; Specifically, each conductor 11 is a tinned copper conductor. The tin coating can reduce oxidation on the copper conductor surface, reduce signal attenuation, improve high-frequency performance, and ensure stable signal transmission. The insulation layer 12 is made of a thermoplastic elastomer, which combines the flexibility of rubber with the processability of plastic. This material can still maintain elasticity in low-temperature environments, preventing embrittlement or cracking of the insulation layer 12. This feature makes the cable suitable for low-temperature scenarios such as polar scientific research, outdoor wiring in cold regions, and cold chain logistics. Specifically, the metal shielding layer 13 comprises an inner metal layer 131 and an outer metal layer 132. The inner metal layer 131 is disposed outside the insulating layer 12 and is composed of a composite tape formed by hot-pressing an inner copper layer and a polyester film. The outer metal layer 132 is disposed outside the inner metal layer 131 and is tightly wrapped with a stainless steel braided mesh. This double-layer design of the metal shielding layer 13 not only improves the cable's impact and wear resistance, protecting the cable's internal insulating layer 12 from external damage, but also reduces high-frequency interference, ensuring the stability and accuracy of data transmission. As a preferred embodiment, a buffer layer 14 is provided between the insulating layer 12 and the inner metal layer 131. The buffer layer 14 is wrapped around the outside of the insulating layer 12 and is made of foamed polyethylene. This has excellent buffering performance, reduces the weight of the cable, protects the core structure 1, alleviates the extrusion or impact of the metal shielding layer 13 on the core structure 1, and prevents damage to the insulating layer 12 or the conductor 11. The outer sheath 2 is wrapped around the outside of the core structure 1. The outer sheath 2 is made of thermoplastic elastomer, and can also be made of cross-linked polyethylene, modified polypropylene, aramid fiber and composite materials; The functional layer 3 is provided between the outer sheath 2 and the metal shielding layer 13. The functional layer 3 includes a thermal insulation layer 31, a heat conducting layer 32, a heating layer 33 and a reinforcement layer 34; The insulation layer 31 includes an insulation inner layer 311 and an insulation outer layer 312. The insulation inner layer 311 is wrapped around the outside of the outer metal layer 132. The insulation outer layer 312 is arranged between the inner side of the outer jacket 2 and the outer side of the reinforcement layer 34. The heat-conducting layer 32 is wrapped around the outside of the insulation inner layer 311. The heating layer 33 is arranged between the outer side of the heat-conducting layer 32 and the inner side of the reinforcement layer 34. Specifically, the thermal insulation inner layer 311 and the thermal insulation outer layer 312, the thermal insulation inner layer 311 is made of EPDM rubber, and the thermal insulation outer layer 312 is a layer of non-woven fabric tape, which is wrapped around the outside of the reinforcement layer 34 by wrapping; Specifically, the heating layer 33 is a soft heating sheet tightly wrapped around the outside of the heat-conducting layer 32. When the cable is used in a cold environment, the soft heating sheet can be used to appropriately heat the inside of the cable, so that the temperature difference between the inside and outside of the cable is kept within a certain temperature range, effectively avoiding the impact of low temperature on the data transmission of the cable; Specifically, the reinforcement layer 34 is made of aramid fiber. Because aramid fiber has extremely high tensile strength, it can significantly improve the impact resistance and extrusion resistance of the cable. It can maintain stable performance at low temperatures and is suitable for extreme environments. like Figure 2 As shown, this embodiment also provides an implementation scheme, which is as follows: On the basis of the above embodiment, the cable further includes a protective outer layer 4 for enhancing the protective function of the cable. The protective outer layer 4 includes a nylon sheath 41 and a waterproof layer 42. The waterproof layer 42 is a layer of aluminum-plastic composite tape tightly wrapped around the outside of the outer sheath 2. The nylon sheath 41 is coated with a hot-melt adhesive coating, which melts after heating to form a sealing layer. The aluminum-plastic composite tape is used for efficient waterproofing to prevent the internal insulation layer 12 of the cable from being hydrolyzed or the metal shielding layer 13 from being corroded after water ingress. The nylon sheath 41 is wrapped around the outside of the hot-melt adhesive coating. The nylon sheath 41 is made of high-strength nylon material, which has high hardness and wear resistance and can effectively resist the gnawing of rodents. At the same time, the nylon material also has good flexibility and chemical corrosion resistance. As a preferred embodiment, the protective outer layer 4 further includes a coating layer 43 , and the coating layer 43 includes an inner layer 401 and an outer layer 402 ; It should be noted that the inner layer 401 is a low-temperature anti-cracking coating, which is made of nano-silicone rubber composite material. The outer layer 402 is a super-hydrophobic anti-icing coating, which allows the inner layer 401 to provide basic flexibility and the outer layer 402 to withstand surface wear, thereby improving the flexibility of the entire cable.

[0021] like Figure 1 and Figure 2 As shown in this embodiment, it should be noted that the actual dimensions of the various components in the application document are selected and installed according to the actual needs of the site before implementation; the cable is manufactured according to existing production processes. In addition, it should be noted that this application document only improves the shortcomings of the existing cold-resistant and environmentally friendly cables, which are prone to cracking and rupture in low temperature environments, and does not involve other aspects. The working principle of this -52℃ cold-resistant and environmentally friendly cable is described as follows: When the cable solution of the present invention is actually manufactured and used, the functional layer 3 composed of a thermal insulation layer 31, a heat-conducting layer 32, a heating layer 33 and a reinforcement layer 34 is designed and arranged between the outer sheath 2 and the metal shielding layer 13. The thermal insulation layer 31 adopts a double-layer design of a thermal insulation inner layer 311 and a thermal insulation outer layer 312. The thermal insulation inner layer 311 is made of ethylene propylene rubber, and the thermal insulation outer layer 312 is a layer of non-woven fabric tape, which is wrapped around the outside of the reinforcement layer 34 by wrapping. On the one hand, while taking into account the low temperature environment, it can also improve the flexibility, mechanical strength and environmental performance of the cable and prevent the cable from cracking and rupture. On the other hand, the heating layer 33 is a layer of soft heating plate tightly wrapped around the outside of the heat-conducting layer 32. When the cable is used in a cold environment, the soft heating plate can be used to appropriately heat the inside of the cable to keep the temperature difference between the inside and outside of the cable within a certain temperature range, effectively avoiding the impact of low temperature on the data transmission of the cable.

[0022] In addition, by designing a nylon sheath 41, a waterproof layer 42, and a coating layer 43 as a protective outer layer 4, which is wrapped around the outside of the cable's outer sheath 2, the nylon sheath 41 is wrapped around the outside of the hot-melt adhesive coating. The nylon sheath 41 is made of high-strength nylon material, which has high hardness and wear resistance and can effectively resist the gnawing of rodents; at the same time, the nylon material also has good flexibility and chemical corrosion resistance. The nylon sheath 41 is coated with a layer of hot-melt adhesive coating, which melts after heating to form a sealing layer, and is combined with an aluminum-plastic composite tape for efficient waterproofing to prevent the internal insulation layer 12 of the cable from hydrolyzing or the metal shielding layer 13 from being corroded after water ingress. The coating layer 43 includes an inner layer 401 and an outer layer 402. The inner layer 401 is a low-temperature anti-cracking coating, which is made of a nano-silicone rubber composite material. The outer layer 402 is a super-hydrophobic anti-icing coating. The inner layer 401 provides basic flexibility, and the outer layer withstands surface wear, thereby improving the flexibility of the entire cable.

[0023] Furthermore, by designing each conductor 11 within the cable's core structure 1 as a tinned copper conductor, the tin coating reduces surface oxidation of the copper conductor, lowering signal attenuation, improving high-frequency performance, and ensuring stable signal transmission. The insulation layer 12 is made of a thermoplastic elastomer, a material that combines the flexibility of rubber with the processability of plastic, maintaining elasticity even at low temperatures and preventing embrittlement or cracking of the insulation layer 12. The metal shielding layer 13 comprises an inner metal layer 131 and an outer metal layer 132. The inner metal layer 131 is disposed outside the insulation layer 12 and is composed of a composite tape formed by hot-pressing an inner copper layer and a polyester film. The outer metal layer 132 is disposed outside the inner metal layer 131 and is tightly wrapped with a stainless steel braided mesh. This double-layer design of the metal shielding layer 13 not only improves the cable's impact and abrasion resistance, protecting the cable's internal insulation layer 12 from external damage, but also reduces high-frequency interference, ensuring stable and accurate data transmission. A buffer layer 14 is provided between the insulating layer 12 and the inner metal layer 131. The buffer layer 14 is wrapped around the outside of the insulating layer 12 and is made of foamed polyethylene. This has excellent buffering performance, reduces the weight of the cable, protects the core structure 1, alleviates the extrusion or impact of the metal shielding layer 13 on the core structure 1, prevents damage to the insulating layer 12 or the conductor 11, and thus extends the service life of the entire cable.

[0024] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A -52°C cold-resistant and environmentally friendly cable, comprising a core structure (1), wherein the core structure (1) comprises a plurality of conductors (11) distributed in an array, an insulating layer (12) wrapped around the outside of each conductor (11), and a metal shielding layer (13) wrapped around the outside of the insulating layer (12), wherein each of the conductors (11) is a tinned copper conductor; It is characterized in that The metal shielding layer (13) comprises an inner metal layer (131) and an outer metal layer (132), wherein the inner metal layer (131) is arranged outside the insulating layer (12), and the outer metal layer (132) is arranged outside the inner metal layer (131); Also includes: An outer sheath (2) wrapped around the outside of the wire core structure (1), wherein the outer sheath (2) is made of a thermoplastic elastomer; A functional layer (3) is provided between the outer sheath (2) and the metal shielding layer (13), wherein the functional layer (3) comprises a thermal insulation layer (31), a heat conducting layer (32), a heating layer (33), and a reinforcement layer (34); The thermal insulation layer (31) comprises a thermal insulation inner layer (311) and a thermal insulation outer layer (312), wherein the thermal insulation inner layer (311) is wrapped around the outside of the outer metal layer (132), and the thermal insulation outer layer (312) is arranged between the inner side of the outer sheath (2) and the outer side of the reinforcement layer (34), the thermal conductive layer (32) is wrapped around the outside of the thermal insulation inner layer (311), and the heating layer (33) is arranged between the outer side of the thermal conductive layer (32) and the inner side of the reinforcement layer (34).

2. The -52°C cold-resistant and environmentally friendly cable according to claim 1, characterized in that: The thermal insulation inner layer (311) and the thermal insulation outer layer (312) are made of ethylene propylene rubber, and the thermal insulation outer layer (312) is a layer of non-woven fabric tape, which is wrapped around the outside of the reinforcement layer (34) by wrapping.

3. The -52°C cold-resistant and environmentally friendly cable according to claim 1, characterized in that: The inner metal layer (131) is composed of a composite tape formed by hot-pressing an inner copper layer and a polyester film, and the outer metal layer (132) is tightly wrapped around the outside of the inner metal layer (131) using a stainless steel braided mesh.

4. The -52°C cold-resistant and environmentally friendly cable according to claim 1, characterized in that: A buffer layer (14) is provided between the insulating layer (12) and the inner metal layer (131), and the buffer layer (14) is wrapped around the outside of the insulating layer (12).

5. The -52°C cold-resistant and environmentally friendly cable according to claim 1, characterized in that: The heating layer (33) is a layer of soft heating sheet tightly wrapped around the outside of the heat-conducting layer (32).

6. The -52°C cold-resistant and environmentally friendly cable according to claim 1, characterized in that: The reinforcement layer (34) is made of aramid fiber.

7. The -52°C cold-resistant and environmentally friendly cable according to claim 1, characterized in that: It also includes a protective outer layer (4), the protective outer layer (4) includes a nylon sheath (41) and a waterproof layer (42), the waterproof layer (42) is a layer of aluminum-plastic composite tape tightly wrapped around the outside of the outer sheath (2), and the nylon sheath (41) is coated with a layer of hot melt adhesive coating.

8. The -52°C cold-resistant and environmentally friendly cable according to claim 7, characterized in that: The protective outer layer (4) further includes a coating layer (43), and the coating layer (43) includes an inner layer (401) and an outer layer (402); The inner layer (401) is a low-temperature anti-cracking coating, and the outer layer (402) is a super-hydrophobic anti-icing coating.

Images