Cable, cable processing method and cable system

Abstract

The present application provides a cable, a cable processing method and a cable system. The cable comprises cable cores and a cable protection layer provided on the outer layers of the cable cores; in the radial direction of the cable cores, the cable protection layer comprises an inner protection layer, a heating assembly and an outer protection layer which are successively arranged, the inner protection layer being closer to the cable cores than the outer protection layer; the inner protection layer comprises a metal sheath layer, the metal sheath layer comprising an infrared reflective metal layer, and the infrared reflective metal layer wrapping the periphery of the cable cores; the heating assembly comprises, in communication connection to each other, temperature measuring members and heating members, the temperature measuring members and the heating members being arranged at intervals in the circumferential direction of the cable cores. The present application has the beneficial effect of ensuring the normal operation of cables in extremely cold weather.

Description

Cable, cable processing method and cable system Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a cable, a cable processing method, and a cable system. Background Art

[0002] my country has a vast territory and diverse geographical environments. The continuous development of my country's economy and technology has also driven the rapid development of railways. Due to design requirements, railway signal cables often need to be laid along the railway tracks in fixed pipes or troughs.

[0003] In some areas of our country, there is a big temperature difference between day and night, especially in winter. The outdoor temperature in some parts of Northeast China can reach -50℃. In extremely cold conditions, water vapor freezes and easily forms ice spikes to damage cables, seriously affecting the safety of cable and train operation. Summary of the Invention

[0004] In view of this, the present application provides a cable, a cable processing method and a cable system to solve the problem that existing cables cannot adapt to extremely cold weather and cannot be used normally.

[0005] One embodiment of the present application provides a cable, comprising a cable core and a cable sheath arranged on the outer layer of the cable core, wherein in the radial direction of the cable core, the cable sheath comprises an inner sheath, a heating assembly and an outer sheath arranged in sequence, and the inner sheath is closer to the cable core relative to the outer sheath; the inner sheath comprises a metal sheath layer, the metal sheath layer comprises an infrared reflective metal layer, and the infrared reflective metal layer is wrapped around the outer circumference of the cable core; wherein the heating assembly comprises a temperature detection element and a heating element in communication connection, and the temperature detection element and the heating element are arranged at intervals from each other along the circumferential direction of the cable core.

[0006] The present application also provides a cable processing method for processing the cable as described above, the cable processing method comprising: wrapping an inner protective layer around the outer periphery of the cable core using a wrapping process; wherein the inner protective layer comprises a metal sheath layer, the metal sheath layer comprises an infrared reflective metal layer, and the infrared reflective metal layer is wrapped around the outer periphery of the cable core; arranging a temperature detecting element and a heating element relatively spaced apart on the outer surface of the inner protective layer, wherein the heating element is located on opposite sides of the temperature detecting element, and the heating element is communicatively connected to the temperature detecting element; wrapping an outer protective layer around the outer periphery of the inner protective layer, so that the temperature detecting element and the heating element are located between the inner protective layer and the outer protective layer.

[0007] The present application also provides a cable system, comprising a power supply, a control component and the cable as described above, wherein the power supply is electrically connected to the heating component, and the control component is communicatively connected to the temperature detection component and the heating component.

[0008] The cable of the present application is provided with a temperature detection element and a heating element on the outer surface of the metal sheath layer. When the cable is in extremely cold weather, the heating element can automatically heat the cable. At the same time, the temperature detection element can detect the temperature generated by the heating element in real time. The heating element can adjust the heating temperature or heating power in time according to the detection result of the temperature detection element, so that the cable is in a constant temperature state, and also prevent the extremely cold environment from affecting the normal operation of the cable. Furthermore, when the heating element is working, its heat is dissipated to the surroundings. The cable of the present application is provided with an infrared reflective metal layer on the side of the heating element close to the cable core. The heat dissipated by the heating element toward the cable core can be reflected to the outer sheath through the infrared reflective metal layer, thereby improving the heat utilization rate. When the ambient temperature is low, the temperature of the outer sheath of the cable is high, and the probability of water vapor freezing on the outside of the cable to form ice spikes is low, thereby reducing the probability of the cable being punctured by ice spikes. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a schematic structural diagram of a cable according to an embodiment of the present application.

[0010] FIG. 2 is a schematic diagram showing a part of the simple structure of the infrared reflective metal layer in FIG. 1 .

[0011] FIG3 is a schematic structural diagram of a cable system according to an embodiment of the present application.

[0012] Description of the main component symbols Cable 100 Cable core 10 Conductor 12 Insulation layer 13 Filler 14 Cable sheath 20 Inner sheath 30 Wrapping layer 31 Insulation layer 32 Insulation cotton 321 Foamed polypropylene insulation layer 322 Metal sheath layer 33 Aluminum sheath layer 331 Infrared reflective metal layer 332 Protrusion 333 Heating assembly 40 Temperature detection element 41 Heating element 42 Thermal conductive silicone element 43 Outer sheath 50 Irradiation cross-linked sheath 51 Insulation layer 52 Heat conduction channel 521 Metal armor layer 53 Cable system 200 Power supply 201 Control element 202 DETAILED DESCRIPTION

[0013] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present application. The described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0016] It should be further noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0017] In this application, "at least one" means one or more, and "more than one" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0018] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0019] Referring to Figure 1, this embodiment provides a cable 100. The cable 100 includes a cable core 10 and a cable sheath 20 provided on the outer layer of the cable core 10. In the radial direction of the cable core 10, the cable sheath 20 includes an inner sheath 30, a heating assembly 40, and an outer sheath 50 arranged in sequence, and the inner sheath 30 is closer to the cable core 10 relative to the outer sheath 50. The inner sheath 30 includes a metal sheath layer 33, and the metal sheath layer 33 includes an infrared reflective metal layer 332, and the infrared reflective metal layer 332 is wrapped around the outer periphery of the cable core 10. The heating assembly 40 includes a temperature detection element 41 and a heating element 42, and the heating element 42 is located on opposite sides of the temperature detection element 41. The temperature detection element 41 and the heating element 42 are relatively spaced apart and arranged between the inner sheath 30 and the outer sheath 50, and the temperature detection element 41 is communicatively connected to the heating element 42.

[0020] Of course, in some embodiments, the heating component 40 may also include a thermally conductive silicone member 43, which is filled between the temperature detection member 41 and the heating member 42. The thermally conductive silicone member 43 is coated using a heated glue injection machine, and is evenly coated after passing through an extrusion mold to fill all gaps between the temperature detection member 41 and the heating member 42, forming a silicone tubular ring. The thickness of the silicone tubular ring is in the range of 0.2mm-0.5mm (for example, 0.3mm, 0.4mm, etc.). The thermally conductive silicone member 43 has high thermal conductivity, so that the heat of the heating member 42 of the cable 100 is evenly conducted to the surface of the cable 100, reducing the probability of local burning. In this embodiment, the outer surface of the outer sheath 50 is coated with a radiation cross-linked sheath 51. Among them, the radiation cross-linked sheath 51 can be a radiation cross-linked polyolefin sheath, and the radiation cross-linked polyolefin sheath is obtained by electron accelerator radiation cross-linking technology. The radiation cross-linked polyolefin sheath has the advantages of low temperature resistance, UV resistance, acid and alkali resistance, and extremely low water absorption, so it can adapt to extreme environments such as extreme cold or extreme heat.

[0021] In this embodiment, the temperature detection element 41 is a temperature sensor, and the heating element 42 is a heating resistance wire. The diameter of the temperature sensor ranges from 1.0 mm to 1.2 mm, for example, 1.12 mm, 1.15 mm, 1.16 mm, 1.18 mm, etc. The diameter of the heating resistance wire ranges from 1.0 mm to 1.2 mm, for example, 1.13 mm, 1.15 mm, 1.17 mm, 1.19 mm, etc. The temperature sensor monitors and adjusts the temperature control of the heating resistance wire to ensure that the cable 100 reaches a certain temperature while preventing the cable 100 from being damaged due to excessive temperature. The heating resistance wire can be made of nickel or chromium alloy and has the characteristics of fast heating, low energy consumption, and high temperature resistance.

[0022] In one embodiment, four heating resistors may be disposed between two temperature sensors, and the spacing between a temperature sensor and adjacent heating resistors is the same as the spacing between two adjacent heating resistors. In other embodiments, six heating resistors may be disposed between two temperature sensors, or two heating resistors may be disposed between two temperature sensors. This can be modified based on actual needs and is not limited in this application. Placing the heating resistors and temperature sensors relatively spaced apart between the inner sheath 30 and the outer sheath 50 can also improve the tensile and compressive properties of the cable 100.

[0023] It is worth noting that the infrared-reflective metal layer 332 reflects the heat generated by the heating element 42 during the heating process, allowing the heat radiated by the heating element 42 to reach the outer sheath 50 of the cable 100 as much as possible. When the ambient temperature is low, the outer sheath 50 of the cable 100 is at a higher temperature, and the probability of water vapor freezing on the outside of the cable 100 to form ice spikes is low, thereby reducing the probability of the cable 100 being punctured by ice spikes. In addition, when the ambient temperature is too high, the infrared-reflective metal layer 332 can also reflect external infrared radiation, reducing the temperature between the aluminum jacket layer 331 and the outer sheath 50.

[0024] In some embodiments, the surface of the infrared-reflective metal layer 332 facing the heating assembly 40 may be circular or have other shapes. As shown in FIG2 , on the side of the infrared-reflective metal layer 332 facing the heating assembly 40, the infrared-reflective metal layer 332 has multiple protrusions 333 formed toward the cable core 10 at locations corresponding to the heating element 42 to better focus and reflect the heat generated by the heating element 42. The protrusions 333 may be in the shape of an arc, a triangle, a trapezoid, or the like.

[0025] Specifically, one protrusion 333 corresponds to one heating element 42 or one temperature detecting element 41. Providing multiple protrusions 333 on the side of the infrared reflective metal layer 332 facing the heating assembly 40 not only reduces the difficulty of producing the cable 100, but also allows for locating the position of the heating element 42 during the production process.

[0026] In another embodiment, as shown in FIG1 , the metal sheath layer 33 further includes an aluminum sheath layer 331 , with an infrared-reflecting metal layer 332 wrapped around the outer periphery of the aluminum sheath layer 331 . The thickness of the aluminum sheath layer 331 ranges from 1.0 mm to 2.0 mm, for example, 1.2 mm, 1.4 mm, 1.52 mm, 1.6 mm, 1.8 mm, etc. The aluminum sheath layer 331 is made of aluminum or aluminum alloy strip, which is formed by high-frequency welding to form a seamless metal tube (i.e., the aluminum sheath layer 331 ), which effectively prevents water and protects the cable core 10 from electromagnetic interference. Compared to other metal materials, the aluminum or aluminum alloy strip has greater flexibility, allowing the aluminum sheath layer 331 to bend with the cable core 10 during cable 100 construction. Furthermore, because the aluminum sheath layer 331 is a sealed sheath, it is waterproof. Furthermore, the aluminum sheath layer 331 is a non-magnetic metal, which can also prevent external magnetic interference.

[0027] The infrared reflective metal layer 332 can be a coating provided on the side of the aluminum sheath layer 331 away from the cable core 10. On the side of the aluminum sheath layer 331 facing the heating assembly 40, the aluminum sheath layer 331 has multiple protrusions 333 formed in the direction of the cable core 10 at positions corresponding to the heating elements 42. The side of the aluminum sheath layer 331 facing the cable core 10 is a smooth surface to protect the internal cable core 10 from damage. Optionally, the infrared reflective metal layer 332 is formed by a composite infrared reflective coating, the composite coating being synthesized using a rutile titanium-based fuel such as titanium chrome brown or titanium nickel yellow, and the composite coating thickness being greater than 0.1 mm.

[0028] Furthermore, the cable core 10 includes a conductor 12, an insulating layer 13 and a filler 14. The insulating layer 13 is wrapped around the outer circumference of the conductor 12, and the insulating layer 13 and the conductor 12 are star-twisted, and the filler 14 is located between the insulating layer 13 and the inner sheath 30. In this embodiment, four groups of cable cores 10 can be provided, and the four groups of cable cores 10 are arranged in a 2×2 array. In other embodiments, six groups of cable cores 10 can be provided according to actual needs, and the six groups of cable cores 10 are arranged in a 3×2 array. This application does not limit the number of cable cores 10 and the arrangement of multiple groups of cable cores 10. In addition, the insulating layer 13 is made of CO2 ultra-microporous high melt strength polypropylene (HMSPP) foam, and polypropylene (HMSPP) foam has higher temperature resistance and pressure resistance. The filler 14 is flexible polypropylene.

[0029] In the cable 100 of this embodiment, an inner sheath 30 is wrapped around the outer surface of the cable core 10, and an outer sheath 50 is wrapped around the outer surface of the inner sheath 30. Furthermore, a heating assembly 40 is provided between the outer sheath 50 and the inner sheath 30 for heating. This allows the heating assembly 40 to heat the cable 100 when it is exposed to extremely cold weather, thereby preventing moisture from condensing into ice spikes on the surface of the cable 100 and damaging the cable 100. Furthermore, the inner sheath 30 can also prevent the high temperature from affecting the operation of the cable core 10 when the cable 100 is exposed to extremely hot weather.

[0030] Specifically, the inner sheath 30 also includes a wrapping layer 31 and a thermal insulation layer 32. The wrapping layer 31 wraps around the outer periphery of the cable core 10, the thermal insulation layer 32 wraps around the wrapping layer 31, the metal sheath 33 wraps around the outer periphery of the thermal insulation layer 32, and the outer sheath 50 wraps around the outer periphery of the metal sheath 33. In this embodiment, the wrapping layer 31 is a high-temperature polyimide film tape with a thickness ranging from 0.05 mm to 0.07 mm. The overlap ratio of a single layer of the high-temperature polyimide film tape wrapped around the outer periphery of the cable core 10 is not less than 20% of the width of the high-temperature polyimide film tape. When the external temperature is too high, the thermal insulation layer 32 can isolate the external high temperature, and the wrapping layer 31 can firmly wrap the cable core 10. The thermal insulation layer 32 and the wrapping layer 31 can prevent the external high temperature from damaging the internal cable core 10.

[0031] In some embodiments, the insulation layer 32 includes insulation cotton 321 and a foamed polypropylene insulation layer 322. The insulation cotton 321 is wrapped around the outer periphery of the wrapping layer 31, the foamed polypropylene insulation layer 322 is wrapped around the outer periphery of the insulation cotton 321, and the metal sheath is wrapped around the outer periphery of the foamed polypropylene insulation layer 322. In this embodiment, the insulation cotton 321 is a dehydrated cotton yarn braid. The dehydrated cotton yarn braid can reduce the interference of external heat conduction on the cable core 10 of the cable 100, and at the same time can protect the cable core 10 from the increase in pressure resistance. The insulation cotton 321 makes the cable 100 flexible when bending, has better peeling properties during the construction process of the cable 100, improves the bending performance of the cable 100, and makes the bending radius of the cable 100 less than 15 times the diameter of the cable 100.

[0032] In this embodiment, the thermal insulation cotton 321 can not only reduce the interference of external heat conduction on the cable core 10, but also improve the pressure-bearing capacity of the cable core 10. The wrapping layer 31 can tightly wrap the cable core 10, and the thermal insulation layer 32 can prevent external high temperature from damaging the internal cable core 10. The aluminum sheath layer 331 and the infrared reflective metal layer 332 can adapt to the bending of the cable core 10 and improve the thermal efficiency of the cable 100. The aluminum sheath layer 331 can prevent magnetic interference and external humidity and other environments from damaging the cable core 10. In some embodiments, the outer sheath 50 includes a thermal insulation layer 52 and a metal armor layer 53. The thermal insulation layer 52 is wrapped around the outer periphery of the inner sheath 30, the metal armor layer 53 is wrapped around the outer periphery of the thermal insulation layer 52, and the radiation cross-linked sheath 51 is coated on the outer surface of the metal armor layer 53. In this embodiment, the insulation layer 52 is made of fiber-reinforced polypropylene, and has a thickness ranging from 1.0 mm to 1.5 mm, for example, 1.15 mm, 1.18 mm, 1.2 mm, 1.36 mm, 1.4 mm, etc. The insulation layer 52 is manufactured by a polypropylene and fiber filament mixed extrusion process, which provides the insulation layer 52 with higher tear resistance and high and low temperature impact resistance. It also prevents cracking of the cable 100 caused by thermal expansion and contraction.

[0033] In some embodiments, to better transfer heat from the cable 100 to the outside and avoid excessive internal temperature affecting the performance of the cable 100, a heat conduction channel 521 is provided within the insulation layer 52. The heat conduction channel 521 penetrates the insulation layer 52 in the radial direction of the cable 100. The heat conduction channel 521 may be hollow or filled with thermally conductive silicone.

[0034] Specifically, the heat-conducting channel 521 can be staggered with the heating element 42. That is to say, a heat-conducting channel 521 is set between the two heating elements 42, or a heat-conducting channel 521 is set between the heating element 42 and the temperature detection element 41. The heat-conducting channel 521 is used to transfer the heat inside the cable 100 to the outside world, preventing heat from accumulating inside the cable 100 to damage the heating element 42. The provision of the heat-conducting channel 521, on the one hand, improves the heating efficiency of the heating element 42. On the other hand, it can also effectively reduce energy consumption, so that the cable 100 has the effect of heat preservation and energy saving. In addition, the heat-conducting silicone member 43 can make the surrounding heat of the heating element 42 in a working state more uniform, forming a surface radiation effect. The heat-conducting channel 521 that is staggered with the heating element 42 can make the heat radiated by the surface better propagate outward, while improving the heating efficiency of the heating element 42, avoiding the situation of only local heating.

[0035] In other embodiments, a heat conduction hole (not shown) may also be opened inside the insulation layer 52 . The function of the heat conduction hole is the same as that of the heat conduction channel 521 , and will not be described in detail here.

[0036] Furthermore, the metal armor layer 53 includes a first steel belt group (not shown) and a second steel belt group (not shown). The first steel belt group is positioned to one side of the second steel belt group. The first steel belt group surrounds the outer circumference of the insulation layer 52 in a clockwise direction, while the second steel belt group surrounds the outer circumference of the insulation layer 52 in a counterclockwise direction. In this embodiment, the first steel belt group comprises two layers of 0.2 mm thick steel belts, which surround the outer circumference of the insulation layer 52 in a clockwise direction, while the second steel belt group comprises two layers of 0.5 mm thick steel belts, which surround the outer circumference of the insulation layer 52 in a counterclockwise direction. In other embodiments, depending on actual design requirements, the first steel belt group may comprise three or four layers of 0.3 mm or 0.4 mm thick steel belts, which surround the outer circumference of the insulation layer 52 in a clockwise direction, while the second steel belt group may comprise three or four layers of 0.4 mm or 0.6 mm thick steel belts, which surround the outer circumference of the insulation layer 52 in a counterclockwise direction. The present application does not limit the number of layers of the first steel belt group surrounding the insulation layer 52 , the number of layers of the second steel belt group surrounding the insulation layer 52 , the thickness of the first steel belt group, and the thickness of the second steel belt group.

[0037] In some embodiments, both the first steel belt group and the second steel belt group are wrapped around the outer periphery of the insulation layer 52 in a gap wrapping manner, and the overlap rate of the first steel belt group is not less than 40%, and the overlap rate of the second steel belt group is not less than 50%. Since the number of layers of the first steel belt group and the second steel belt group wrapped around the insulation layer 52 is multiple layers, the overlap rate is used to characterize the overlapping ratio of two adjacent layers in the first steel belt group or the second steel belt group when the number of layers of the first steel belt group or the second steel belt group wrapped around the insulation layer 52 is multiple layers. Gap wrapping refers to a wrapping method in which a certain gap is left between the edge of the last spiral of the first steel belt group and the edge of the previous spiral. The first steel belt group and the second steel belt group are wrapped around the insulation layer 52 in a gap wrapping manner, so that the cable 100 has resistance to frozen soil extrusion force, thereby ensuring the integrity of the cable 100.

[0038] The cable 100 shown in Figure 1 first has a sheath 31, a thermal insulation layer 32, and a metal sheath layer 33 wrapped around the outer surface of the cable core 10 from the inside out. This prevents heat from entering the cable core 10 when the cable 100 is in extremely hot weather, thus avoiding the problem of the cable core 10 not being able to operate due to high temperature. Then, a temperature detector 41 and a heater 42 are set on the outer surface of the metal sheath layer 33. When the cable 100 is in extremely cold weather, the heater 42 can automatically heat the cable 100. At the same time, the temperature detector 41 can detect the temperature generated by the heater 42 in real time. The heater 42 can adjust the heating temperature or heating power in time according to the detection result of the temperature detector 41, so that the cable 100 is in a constant temperature state, and also prevent the extremely cold environment from affecting the normal operation of the cable 100. Finally, a thermal insulation layer 52 is used to wrap the temperature detector 41 and the heater 42 between the outer surface of the metal sheath layer 33 and the inner surface of the thermal insulation layer 52. A metal armor layer 53 is then wrapped around the outer periphery of the thermal insulation layer 52. The metal armor layer 53 provides the cable 100 with resistance to frost and extrusion, ensuring the integrity of the cable 100. Furthermore, because the outer surface of the metal armor layer 53 is coated with the radiation-crosslinked polyolefin sheath 51, the radiation-crosslinked polyolefin sheath has advantages such as low-temperature resistance, UV resistance, acid and alkali resistance, and extremely low water absorption, thereby providing the cable 100 with resistance to low temperatures, acid and alkali resistance, salt and alkali resistance, and cracking resistance.

[0039] The present application also provides a cable processing method. The cable processing method comprises the following steps:

[0040] First, the inner sheath 30 is wrapped around the outer periphery of the cable core 10 using a wrapping process. Next, the temperature detection component 41 and the heating component 42 are relatively spaced apart on the outer surface of the inner sheath 30, wherein the heating component 42 is located on opposite sides of the temperature detection component 41, and the heating component 42 is communicatively connected to the temperature detection component 41. Finally, the outer sheath 50 is wrapped around the outer periphery of the inner sheath 30, so that the temperature detection component 41 and the heating component 42 are located between the inner sheath 30 and the outer sheath 50. In this embodiment, the temperature detection component 41 and the heating component 42 can be arranged at equal intervals between the inner sheath 30 and the outer sheath 50, so that the heating and temperature control capabilities of the cable 100 are automated. At the same time, a heat-conducting silicone component 43 is filled between the temperature detection component 41 and the heating component 42 to achieve more uniform heat conduction and faster heat conduction speed of the cable 100. In other embodiments, the temperature detection component 41 and the heating component 42 can also be arranged at unequal intervals between the inner sheath 30 and the outer sheath 50, and this application is not limited to this.

[0041] Before wrapping the inner sheath 30 around the outer circumference of the cable core 10 using a wrapping process, the cable 100 processing method further includes: using CO2 injection technology and a polypropylene microporous foaming process to extrude the insulation layer 13. After the insulation layer 13 and the conductor 12 are star-twisted, the twisted insulation layer 13 and conductor 12 are then twisted with the filler 14 to form the cable core 10.

[0042] In some embodiments, the inner sheath 30 is wrapped around the outer periphery of the cable core 10 using a wrapping process, including: wrapping a wrapping layer 31 around the outer periphery of the cable core 10 using a wrapping process. A concentric wrapping machine is used to wrap thermal insulation cotton around the outer periphery of the wrapping layer 31. A foaming extrusion process is used to extrude a layer of foamed polypropylene insulation layer 322 around the outer periphery of the thermal insulation cotton. High-frequency welding is used to weld the outer surface of the foamed polypropylene insulation layer 322 to form an aluminum sheath layer 331. An infrared reflective metal layer 332 is wrapped around the outer surface of the aluminum sheath layer 331.

[0043] In some embodiments, wrapping the outer sheath 50 around the outer periphery of the inner sheath 30 includes wrapping the insulation layer 52 around the outer periphery of the heating assembly 40. A first steel belt assembly is wrapped around the outer periphery of the insulation layer 52 in a clockwise direction, and a second steel belt assembly is wrapped around the outer periphery of the insulation layer 52 in a counterclockwise direction. The first steel belt assembly is positioned to one side of the second steel belt assembly. The first and second steel belt assembly are arranged around the outer periphery of the insulation layer 52 in a clockwise and counterclockwise direction, respectively, thereby increasing the cable 100's resistance to crushing.

[0044] In some embodiments, a radiation-crosslinked jacket 51 is coated on the outer surfaces of both the first and second steel strip groups. Cable 100 coated with the radiation-crosslinked jacket 51 exhibits resistance to low temperatures, acid and alkali, salt and alkali, and cracking. In this embodiment, the radiation-crosslinked jacket 51 can be coated on the outer surface of the outer sheath 50 using electron accelerator radiation crosslinking technology.

[0045] As shown in FIG3 , the present application further provides a cable system 200, comprising a power supply 201, a control component 202, and a cable 100, wherein the power supply 201 is electrically connected to the heating component 42, and the control component 202 is communicatively connected to the temperature detection component 41 and the heating component 42. The power supply 201 can be a power source, and can use wind power, solar power, or the like to generate electricity.

[0046] Specifically, a control component 202 can be communicatively connected to a temperature detection component 41 and multiple heating components 42 adjacent to the temperature detection component 41. When the control component 202 detects that the temperature detected by the corresponding temperature detection component 41 is lower than a preset threshold, the control component 202 controls the heating component 42 to turn on, and the heating component 42 performs heating. The cable system 200 also responds to the control component 202 turning on the heating component 42. When the control component 202 detects that the turning-on time is greater than a preset time and the temperature increase difference detected by the temperature detection component 41 is less than a preset difference, the control component 202 issues a fault message to remind the user to check whether the temperature detection component 41 and the heating component 42 have failed.

[0047] In this embodiment, the preset threshold value may be 40° C., the preset time may be 30 minutes, and the preset difference value may be 10° C. This application does not limit the specific values ​​of the preset threshold value, the preset time, and the preset difference value.

[0048] The cable system 200 can use the power supply 201 to provide power to the heating element 42, and the control element 202 can control when to start the heating element 42 for heating, and detect whether the temperature detection element 41 and the heating element 42 fail. When the temperature detection element 41 and the heating element 42 fail, the user is reminded to check the working status of the temperature detection element 41 and the heating element 42.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not limiting. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A cable comprising a cable core and a cable sheath provided on the outer layer of the cable core, characterized in that: In the radial direction of the cable core, the cable sheath includes an inner sheath, a heating assembly and an outer sheath arranged in sequence, and the inner sheath is close to the cable core relative to the outer sheath; the inner sheath includes a metal sheath layer, the metal sheath layer includes an infrared reflective metal layer, and the infrared reflective metal layer is wrapped around the outer circumference of the cable core; wherein the heating assembly includes a temperature detection element and a heating element in communication connection, and the temperature detection element and the heating element are arranged at intervals from each other along the circumferential direction of the cable core.

2. The cable according to claim 1, wherein The infrared reflective metal layer is provided with a plurality of protrusions facing the cable core on a side facing the heating assembly.

3. The cable according to claim 2, wherein There are multiple temperature detection elements and multiple heating elements, and at least one heating element is provided between two adjacent temperature detection elements. Wherein, one protrusion corresponds to one heating element or one temperature detecting element.

4. The cable according to claim 2, wherein The metal sheath layer further comprises an aluminum sheath layer, and the infrared reflective metal layer is located between the aluminum sheath layer and the heating assembly; The infrared reflective metal layer is a coating provided on the aluminum sheath layer, the protrusion is provided on the side of the aluminum sheath layer facing the heating component, and the side of the aluminum sheath layer facing the cable core is a smooth surface.

5. The cable according to claim 3, wherein The heating component further comprises a heat-conducting silicone member, and the heat-conducting silicone member is filled between the temperature detecting member and the heating member.

6. The cable according to claim 1, wherein The outer protective layer includes a thermal insulation layer, a metal armor layer and a radiation cross-linked sheath. The thermal insulation layer is wrapped around the outer periphery of the inner protective layer. The metal armor layer is wrapped around the outer periphery of the thermal insulation layer. The radiation cross-linked sheath is coated on the outer surface of the metal armor layer.

7. The cable according to claim 6, wherein At least one heat-conducting channel is provided in the heat-insulating layer, and the heat-conducting channel passes through the heat-insulating layer in the radial direction of the cable.

8. The cable according to claim 7, wherein There are multiple heat conduction channels, and the heat conduction channels and the heating elements are arranged in a staggered manner.

9. The cable according to claim 6, wherein The metal armor layer includes a first steel belt group and a second steel belt group. The first steel belt group is arranged on one side of the second steel belt group. The first steel belt group surrounds the outer circumference of the insulation layer in a clockwise direction, and the second steel belt group surrounds the outer circumference of the insulation layer in a counterclockwise direction.

10. The cable according to claim 9, wherein The overlap rate of the first steel belt group is not less than 40%, and the overlap rate of the second steel belt group is not less than 50%. The overlap rate is used to characterize the overlapping ratio between two adjacent layers in the first steel belt group or the second steel belt group when the number of layers of the first steel belt group or the second steel belt group surrounding the insulation layer is multiple layers.

11. A cable processing method for processing the cable according to any one of claims 1 to 10, characterized in that: The cable processing method comprises: The inner sheath is wrapped around the outer periphery of the cable core by a wrapping process; wherein the inner sheath comprises a metal sheath layer, the metal sheath layer comprises an infrared reflective metal layer, and the infrared reflective metal layer is wrapped around the outer periphery of the cable core; A temperature detecting element and a heating element are arranged on the outer surface of the inner protective layer at a relative interval, wherein the heating element is located on two opposite sides of the temperature detecting element and the heating element is communicatively connected to the temperature detecting element; The outer protective layer is wrapped around the outer periphery of the inner protective layer so that the temperature detecting element and the heating element are located between the inner protective layer and the outer protective layer.

12. A cable system, characterized in that: The cable system includes a power supply, a control component, and a cable according to any one of claims 1 to 10, wherein the power supply is electrically connected to the heating component, and the control component is communicatively connected to the temperature detecting component and the heating component.

13. The cable system according to claim 12, wherein One of the control components is communicatively connected to one of the temperature detecting components and a plurality of the heating components adjacent to the temperature detecting component; In response to the temperature detected by the temperature detecting element being lower than a preset threshold, the control element controls the corresponding heating element to turn on; In response to the heating element being turned on for longer than a preset time and the corresponding temperature rise difference detected by the temperature detection element being smaller than a preset difference, the control element issues a message indicating that the heating element or the temperature detection element is currently malfunctioning.

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