A vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable

Abstract

This invention relates to the field of cable technology, and particularly to a vulcanization-free, high-current-carrying, high-insulation, mobile rubber-sheathed flexible cable. The cable includes a cable body, which comprises a cable core. An insulation layer is disposed on the surface of the cable core. A fixing layer, a filling layer, a heat insulation layer, and a protective layer are sequentially disposed on the outer wall of the insulation layer. A fixing frame and a fixing sleeve are fixedly disposed inside the fixing layer. An inner sheath, a tensile-resistant clip, and an outer sheath are sequentially fixedly disposed from the inside out in the protective layer. A temperature regulating component is disposed inside the heat insulation layer, and a compression and tensile-resistant component is disposed inside the protective layer. This invention, by configuring the cable core, insulation layer, fixing layer, filling layer, heat insulation layer, and protective layer, enables the cable body to possess excellent tensile strength, cold resistance, and insulation performance. The fixing layer and filling layer improve the cable's tensile strength, and the protective layer improves the cable's flexibility, tensile strength, and cold resistance, thereby increasing the cable's service life.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable. Background Technology

[0002] With the development of technology, cables are used in various fields. A cable is an electrical energy or signal transmission device, usually composed of several or several groups of conductors. Among them, the conductor structure of a flexible cable is a multi-strand flexible structure. In order to improve the safety level of electrical circuits and reduce the occurrence and loss of electrical fire accidents, the quality of cables should be improved. However, the flexibility and impact resistance of traditional vulcanized rubber insulated cables are poor, which affects the use of cables.

[0003] For example, application number CN111029023B discloses a vulcanization-free rubber-insulated cable, including a support, a cable assembly, a protective layer, and a buffer layer. The cable assembly includes several stranded cables, and the outer surface of the cables is wrapped with an insulation layer and a heat insulation layer from the inside out. The protective layer includes a shielding layer, a vulcanization-free rubber layer, and a self-healing layer arranged from the inside out. By covering the cable with a self-healing layer, the problem of extending the cable's service life is effectively solved when the cable surface is damaged due to long-term use or external factors and cannot be replaced in time. This self-healing layer repairs the cable surface and extends the cable's service life, improves cable safety, and greatly reduces testing and maintenance costs. At the same time, the component ratio of the self-healing layer and the vulcanization-free rubber layer is strictly controlled to effectively enhance the cable's tear resistance and corrosion resistance, achieving a dual protection effect. It also prevents mutual interference between adjacent cables and ensures good conductivity, wear resistance, and anti-interference performance.

[0004] Although the above technical solutions can enable the use of mobile rubber-sheathed flexible cables, they are insufficient in terms of flexibility and impact resistance. When the cable is used in a cold environment, it may become brittle and prone to cracking, with poor compressive strength. When the cable is pulled, the outer layer is easily broken, exposing the inner cable core, thereby shortening the cable's service life.

[0005] Therefore, it is necessary to solve the above problems by using a vulcanization-free, high-current-carrying, high-insulation, mobile rubber-sheathed flexible cable. Summary of the Invention

[0006] The purpose of this invention is to provide a vulcanization-free, high-current-carrying, high-insulation, mobile rubber-sheathed flexible cable to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable, comprising a cable body, the cable body comprising a cable core, an insulation layer disposed on the surface of the cable core, a fixing layer, a filling layer, a heat insulation layer and a protective layer disposed sequentially on the outer wall of the insulation layer, the fixing layer comprising a fixing sleeve connected to the heat insulation layer and a fixing frame located inside the fixing sleeve, the protective layer comprising an inner sheath, a tensile retaining strip and an outer sheath disposed sequentially from the inside to the outside, a temperature regulating component disposed inside the heat insulation layer, and a compression and tensile resistant component disposed inside the protective layer.

[0008] Preferably, the temperature regulating component includes a heat-conducting tape arrayed on a fixed layer, a heating strip disposed inside the heat-conducting tape, a conductive core disposed on the heating strip, parallel spacers arranged in an array fixedly disposed on the surface of the heat-conducting tape, the parallel spacers being electrically connected to the conductive core via a parallel circuit, and a controller arranged in an array fixedly disposed at one end of the heat-conducting tape.

[0009] Preferably, the compression and tension resistant component includes an elastic sleeve, a limiting sleeve is fixedly provided on the surface of the elastic sleeve, an airbag is provided inside the elastic sleeve located above the parallel partition and arranged in an array, a first vent pipe and a second vent pipe are fixedly provided on the surface of the airbag, a guide pipe is fixedly provided on the surface of the second vent pipe, and a control valve is fixedly provided on the surface of the guide pipe.

[0010] Preferably, the airbags distributed along the axial direction of the elastic sleeve are interconnected through a first vent pipe, and the airbags distributed circumferentially along the fixed frame are interconnected through a second vent pipe. The first vent pipe and the second vent pipe connect the airbags distributed on the elastic sleeve into a whole.

[0011] Preferably, the controller has a potential groove, and a bimetallic strip is fixedly installed inside the potential groove. A first movable contact and a second movable contact are respectively provided at the upper and lower ends of the bimetallic strip. The potential groove has a first fixed contact and a second fixed contact corresponding to the first movable contact and the second movable contact. The first fixed contact is located below the first movable contact, and the second fixed contact is located above the second movable contact.

[0012] Preferably, the airbag has an elastic element inside, a secondary contact at the bottom of the airbag, a primary contact at the bottom of the secondary contact, and a receiving groove on the outer surface of the parallel partition that matches the primary and secondary contacts.

[0013] Preferably, the surface of the elastic sleeve is provided with an array of through grooves, an elastic seat is fixedly provided inside the through grooves, an elastic block is fixedly provided on the inner wall of the limiting sleeve, the elastic block is movably engaged inside the elastic seat, the elastic block and the elastic seat are adapted to each other, the interior of the elastic sleeve is provided with an array of cavities corresponding to the through grooves, and the airbag is movably disposed inside the cavity.

[0014] Preferably, one end of the air guide tube is elastically connected to a piston rod, the piston rod is located inside the air guide tube, the piston rod is slidably connected to the air guide tube by a spring, one end of the piston rod is fixedly provided with a fixing block, the surface of the fixing block is fixedly provided with a limit block, and a fixing groove is provided at the position where the fixing block connects with the fixing sleeve.

[0015] Preferably, there are multiple cable cores, which are fixedly disposed between the fixing frame and the fixing sleeve. The cable cores are adapted to the fixing frame and the fixing sleeve, and a limiting groove is provided at the position where the cable cores are connected to the fixing frame.

[0016] Preferably, the tensile strip is fixedly disposed between the inner sheath and the outer sheath, the surface of the inner sheath is provided with a spirally extending tensile groove, the tensile strip is fixedly disposed inside the tensile groove, and the inner sheath is fixedly disposed on the surface of the limiting sleeve.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. This invention, by setting up a cable core, insulation layer, fixing layer, filling layer, heat insulation layer, and protective layer, enables the cable body to have excellent tensile strength, cold resistance, and insulation performance. The insulation layer enhances the insulation performance of the cable body, the fixing layer and filling layer improve the tensile strength of the cable, the heat insulation layer improves the cold resistance of the cable, and the protective layer improves the flexibility, tensile strength, and cold resistance of the cable, thereby increasing the service life of the cable.

[0019] 2. This invention regulates the temperature of the cable body using a temperature regulating component. When the ambient temperature reaches a preset value, one end of the bimetallic strip on the controller bends, causing the moving contact at one end of the bimetallic strip to contact the fixed contact, thereby connecting the power supply. Then, the heat from the heating band is transferred to the cable body through the heat-conducting sheet, preventing damage to the cable body due to excessively low ambient temperature and improving the service life of the cable body. When the temperature rises to the normal value, the bimetallic strip returns to its original shape, the moving contact separates from the fixed contact, thereby disconnecting the power supply and stopping the heating band from heating. This allows the cable body to automatically heat up at low temperatures through the temperature regulating component, adjusting the temperature of the cable body according to the ambient temperature, thus protecting the cable body.

[0020] 3. This invention improves tensile strength by setting up anti-compression and anti-tensile components. When the local temperature of the cable body is low, the gas inside the air bladder expands and contracts due to thermal expansion and contraction. As a result, the air bladder shrinks and deforms. By allowing the gas in the air bladder at a higher temperature to flow to the air bladder at a lower temperature through the first vent pipe, the gas inside the air bladder at a lower temperature is replenished, forming a circulation between the air bladders. This ensures that the air bladders are evenly stressed and prevents local damage to the cable body due to uneven stress.

[0021] 4. This invention incorporates an elastic element. In cold weather, as the gas inside the airbag is heated by the heating belt, the control valve is closed. The elastic restoring force of the elastic element creates a negative pressure inside the airbag, drawing in external gas and increasing its expansion. The airbag then compresses the elastic sleeve and elastic retainer, engaging and securing the elastic retainer with the elastic block on the limiting sleeve, thus strengthening the connection between them. In hot weather, the airbag expands, stretching the elastic element. The control system closes the control valve, and the elastic restoring force creates a positive pressure inside the airbag. The gas inside is discharged to the area between two adjacent heating belts. Since the gas inside the airbag is inert, it fills the interior of the cable body. This prevents over-expansion of the airbag, which could cause cracking of the protective layer. Furthermore, the presence of inert gas within the cable body allows it to be ejected from the ignition point to extinguish fires. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a front view of the overall structure of the present invention.

[0024] Figure 3 This is a cross-sectional view of the cable body structure of the present invention.

[0025] Figure 4 This is a cross-sectional schematic diagram of the outer sheath structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the assembly structure of the temperature regulating component and the compressive and tensile resistant component of the present invention.

[0027] Figure 6 This is a schematic diagram of the fixing sleeve structure of the present invention.

[0028] Figure 7 This is a schematic diagram of the temperature regulation component of the present invention.

[0029] Figure 8 In this invention Figure 7 Enlarged view of point A.

[0030] Figure 9 This is a schematic diagram of the compressive and tensile resistant component structure of the present invention.

[0031] Figure 10 In this invention Figure 9 Enlarged view of point B.

[0032] Figure 11 This is a schematic diagram of the assembly structure of the cable body and the compression and tensile strength components of the present invention.

[0033] Figure 12 In this invention Figure 11 Enlarged view of point C.

[0034] Figure 13 This is a cross-sectional view of the airbag of the present invention.

[0035] In the diagram: 1. Cable body; 11. Cable core; 12. Insulation layer; 13. Fixing layer; 1301. Fixing bracket; 1302. Fixing sleeve; 14. Filling layer; 15. Thermal insulation layer; 16. Protective layer; 1601. Inner sheath; 1602. Outer sheath; 1603. Tensile clamp; 2. Temperature regulating component; 201. Heat conducting tape; 202. Heating tape; 203. Conductive core; 204. Controller; 205. First fixed contact; 206. Second fixed contact; 207. Bimetallic strip ; 208, First moving contact; 209, Second moving contact; 210, Parallel partition; 3, Compression and tension assemblies; 301, Elastic sleeve; 302, Limiting sleeve; 303, Elastic seat; 304, Elastic block; 305, Airbag; 306, First vent pipe; 307, Second vent pipe; 308, Air guide pipe; 309, Control valve; 310, Piston rod; 311, Fixed block; 312, Limiting block; 4, Primary contact; 5, Secondary contact; 6, Receiving slot; 7, Elastic element. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figures 2 to 4As shown, the present invention discloses a vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable, comprising a cable body 1, the cable body 1 comprising a cable core 11, an insulation layer 12 disposed on the surface of the cable core 11, and a fixing layer 13, a filling layer 14, a heat insulation layer 15 and a protective layer 16 disposed sequentially on the outer wall of the insulation layer 12, the fixing layer 13 comprising a fixing sleeve 1302 connected to the heat insulation layer 15 and a fixing frame 1301 located inside the fixing sleeve 1302, and the protective layer 16 comprising an inner sheath 1601, a tensile strip 1603 and an outer sheath 1602 disposed sequentially from the inside to the outside.

[0039] There are multiple cable cores 11, which are fixedly installed between the fixing frame 1301 and the fixing sleeve 1302. The cable cores 11 are adapted to the fixing frame 1301 and the fixing sleeve 1302. A limiting groove is provided at the position where the cable cores 11 are connected to the fixing frame 1301.

[0040] The tensile strip 1603 is fixedly disposed between the inner sheath 1601 and the outer sheath 1602. The surface of the inner sheath 1601 is provided with a tensile groove extending in a spiral shape. The tensile strip 1603 is fixedly disposed inside the tensile groove. The inner sheath 1601 is fixedly disposed on the surface of the limiting sleeve 302.

[0041] In use, the insulation layer 12 is made of TPE material, replacing vulcanized rubber material. This reduces the number of processes and labor costs, and provides high insulation resistance, high insulation resistivity, high current carrying capacity, and improved flexibility. The elongation at break can reach over 700%. Compared to rubber-sheathed flexible cables, it eliminates the vulcanization pipeline process, significantly reducing material and labor costs, and its performance is also greatly improved. The insulation resistivity can reach 1.0*10^15. Structurally, it is the same as the rubber-sheathed flexible cable, ensuring that the cable core 11 is insulated from the surrounding environment or adjacent cable cores 11.

[0042] The fixing layer 13 is fixed by the fixing bracket 1301 and the fixing sleeve 1302 working together to fix the surrounding area of ​​multiple cable cores 11, so as to prevent the position of the cable cores 11 from moving during the dragging and moving of the cable body 1, which would affect the service life.

[0043] The interior of the filling layer 14 is filled with a mixture of aramid filament and polyester tape. Polyester tape has high mechanical strength, excellent insulation properties, and low temperature resistance. Aramid filament is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. It also has good insulation and anti-aging properties and a long service life.

[0044] The insulation layer 15 is filled with ceramic fibers, which are lightweight, oxidation-resistant, flexible, corrosion-resistant and sound-insulating, thus improving the cold resistance of the cable body 1.

[0045] The protective layer 16 is internally constructed with an inner sheath 1601, a tensile retainer 1603, and an outer sheath 1602. All three components—inner sheath 1601, tensile retainer 1603, and outer sheath 1602—are made of rubber, which offers excellent flexibility, corrosion resistance, and tensile strength. The rubber contains ethylene acrylate copolymer, which is soft, cold-resistant, and UV-resistant, making it suitable for low-temperature environments and outdoor use, thus extending the cable's service life. When the cable is stretched to a certain extent, the tensile retainer 1603 limits the tension, preventing excessive strain from damaging the inner sheath 1601 and outer sheath 1602, while also enhancing the tensile strength between them.

[0046] This invention, by setting up a cable core 11, an insulation layer 12, a fixing layer 13, a filling layer 14, a heat insulation layer 15, and a protective layer 16, enables the cable body 1 to have excellent tensile strength, cold resistance, and insulation performance. The insulation layer 12 enhances the insulation performance of the cable body 1, the fixing layer 13 and the filling layer 14 improve the tensile strength of the cable, the heat insulation layer 15 improves the cold resistance of the cable, and the protective layer 16 improves the flexibility, tensile strength, and cold resistance of the cable, thereby increasing the service life of the cable.

[0047] Example 2

[0048] During the use of Example 1, it was found that although the cable body 1 has good tensile strength, this performance is based on the characteristics of the tensile material of the cable body 1. Although effective, the tensile strength is limited, and the material properties of the cable body 1 will change in cold environments, resulting in a significant reduction in tensile strength. Based on this, this application proposes the following improvement scheme:

[0049] like Figures 1 to 12 As shown, the temperature regulating component 2 includes a heat-conducting tape 201 arrayed on a fixed layer 13. A heating tape 202 is disposed inside the heat-conducting tape 201, and a conductive core 203 is disposed on the heating tape 202. Parallel spacers 210 are fixedly disposed in an array on the surface of the heat-conducting tape 201. The parallel spacers 210 and the conductive core 203 are electrically connected through a parallel circuit. A controller 204 is fixedly disposed in an array at one end of the heat-conducting tape 201. Each controller 204 has a potential groove, and a bimetallic strip 207 is fixedly disposed inside each potential groove. A first movable contact 208 is fixedly disposed at the lower end of the bimetallic strip 207. A first fixed contact 205 is fixedly disposed inside the potential groove, and the first fixed contact 205 is located below the first movable contact 208. The first fixed contact 205 and the first movable contact 208 are adapted to each other and are electrically connected.

[0050] During use, when the ambient temperature of the cable is low, the temperature of the cable body 1 is adjusted by the temperature regulating component 2. During operation, the conductive core 203 is connected to the power controller 204. When the ambient temperature reaches a preset value, one end of the bimetallic strip 207 on the controller 204 bends, causing the first moving contact 208 at one end of the bimetallic strip 207 to contact the first fixed contact 205, thereby connecting the power supply. This causes the heating tape 202 to conduct electricity and generate heat, which is then transferred to the cable body 1 through the heating tape 201, thereby improving the cable's heating efficiency. The temperature of the cable body 1 is adjusted to prevent damage to the cable body 1 due to excessively low external temperature. This improves the characteristics of the cable body 1, such as high brittleness when cold, difficulty in bending, and poor tensile strength, thereby increasing the service life of the cable body 1. When the temperature rises to the normal value, the bimetallic strip 207 returns to its original state, the first moving contact 208 separates from the first fixed contact 205, thereby disconnecting the power supply, and the heating tape 201 stops heating. This allows the cable body 1 to automatically heat up under low temperature conditions through the temperature regulating component 2, adjusting the temperature of the cable body 1 according to the external temperature, thereby protecting the cable body 1.

[0051] The compression and tension assemblies 3 include an elastic sleeve 301, a limiting sleeve 302 fixedly disposed on the surface of the elastic sleeve 301, and an airbag 305 disposed inside the elastic sleeve 301 above the parallel partition 210 and arranged in an array. A first vent pipe 306 and a second vent pipe 307 are fixedly disposed on the surface of the airbag 305. A guide pipe 308 is fixedly disposed on the surface of the second vent pipe 307, and a control valve 309 is fixedly disposed on the surface of the guide pipe 308.

[0052] The airbags 305 distributed along the axial direction of the elastic sleeve 301 are interconnected through the first vent pipe 306, and the airbags 305 distributed circumferentially along the fixed frame 1301 are interconnected through the second vent pipe 307. The first vent pipe 306 and the second vent pipe 307 connect the airbags 305 distributed on the elastic sleeve 301 into a whole.

[0053] The elastic sleeve 301 has an array of through grooves on its surface. An elastic seat 303 is fixedly installed inside the through groove. An elastic block 304 is fixedly installed on the inner wall of the limiting sleeve 302. The elastic block 304 is movably engaged inside the elastic seat 303. The elastic block 304 is adapted to the elastic seat 303. The elastic sleeve 301 has an array of cavities corresponding to the through grooves inside its surface. The airbag 305 is movably installed inside the cavity.

[0054] One end of the air guide tube 308 is elastically connected to a piston rod 310. The piston rod 310 is located inside the air guide tube 308. The piston rod 310 is slidably connected to the air guide tube 308 by a spring. One end of the piston rod 310 is fixedly provided with a fixing block 311. A limit block 312 is fixedly provided on the surface of the fixing block 311. A fixing groove is provided at the position where the fixing block 311 connects with the fixing sleeve 1302.

[0055] When the ambient temperature is low, the gas contracts upon cooling, causing the air bladder 305 to shrink. When the local temperature of the cable body 1 is low, it is prone to localized rupture. Since adjacent air bladders 305 are connected by a first vent pipe 306 and a second vent pipe 307, the gas in the air bladder 305 at a higher temperature flows through the first vent pipe 306 to the air bladder 305 at a lower temperature, replenishing the gas inside the lower-temperature air bladder 305 and creating a circulation between the air bladders 305. This ensures even stress distribution and prevents localized damage to the cable body 1 due to uneven stress. Because excessively low temperatures affect the properties of the cable material, making it brittle and prone to cracking, additional measures are taken to strengthen the bond between the internal layers of the cable and prevent gaps or separation between layers due to varying degrees of material contraction upon cooling. These measures are implemented when the cable is pulled. Twisting can occur, leading to localized cable breakage. By setting up the anti-compression and anti-tension component 3, the fixation between layers is increased, and the tensile strength is improved. When the parallel spacer 210 transfers the heat from the conductive tape 201 to the airbag 305, the gas inside the airbag 305 expands due to the heat, thus increasing the volume of the airbag 305. The gas inside the airbag 305 at the lower temperature expands rapidly, and the elastic sleeve 301 deforms as the airbag 305 expands. The airbag 305 compresses the elastic sleeve 301 and the elastic retainer 303, thereby causing the elastic retainer 303 to engage and fix with the elastic retainer block 304 on the limiting sleeve 302. This strengthens the connection between the elastic sleeve 301 and the limiting sleeve 302, preventing damage to the outer sheath 1602 and the inner sheath 1601 due to the different tensile forces borne by the outer sheath 1602 and the inner sheath 1601 during the pulling process of the cable body 1.The elastic retainer 303 and the elastic retainer 304 work together to enhance the connection between the elastic sleeve 301 and the limiting sleeve 302, thereby strengthening the connection between the limiting sleeve 302 and the inner and outer protective sleeves 1601 and 1602, and thus strengthening the fixation between the insulation layer 15 and the protective layer 16. When the airbag 305 inflates to a certain extent, the gas inside the airbag 305 will overflow. The overflowing gas fills the first vent pipe 306, the second vent pipe 307 and the air guide pipe 308, and the internal pressure will increase. Since the control valve 309 is in the open state at this time, the gas in the airbag 305 cannot overflow from the control valve 309, thereby making the air guide pipe 306... The internal gas pushes the piston rod 310 towards the fixed sleeve 1302, causing the piston rod 310 to move together with the fixed block 311 and the limiting block 312. This engages the fixed block 311 and the limiting block 312 in the fixing groove on the surface of the fixed sleeve 1302. Through the cooperation of the piston rod 310, the fixed block 311, and the limiting block 312, the connection between the elastic sleeve 301 and the fixed sleeve 1302 is enhanced, thereby strengthening the fixation between the fixed layer 13 and the protective layer 16. This prevents uneven stress between layers due to gaps when pulling the cable, thus increasing the tensile strength of the cable body 1.

[0056] By cooperating with the temperature regulating component 2 and the compression and tension resisting component 3, the cable body 1 can regulate its own temperature in a low-temperature environment through the heat conduction tape 201, thereby enhancing the cold resistance of the cable body 1. When the temperature regulating component 2 regulates the temperature of the cable body 1, the compression and tension resisting component 3 strengthens the fixation between the layers, preventing the cable from twisting due to uneven stress between the layers caused by gaps between the layers when the cable is pulled, thus preventing damage to the cable.

[0057] Working principle: When the local temperature of the cable body 1 is low, it is prone to local rupture. The gas inside the air bladder 305 contracts upon cooling, thus reducing its volume. Since adjacent air bladders 305 are connected by the first vent pipe 306 and the second vent pipe 307, the gas in the air bladder 305 at a higher temperature flows through the first vent pipe 306 to the air bladder 305 at a lower temperature, replenishing the gas inside the lower-temperature air bladder 305. This creates a circulation between the air bladders 305, ensuring even stress distribution and preventing uneven stress within the cable body 1. Uniformity leads to localized damage, thereby improving the tensile strength of the cable body 1. When the external temperature reaches the preset value, the bimetallic strip 207 on the controller 204 bends, causing the first moving contact 208 at the end of the bimetallic strip 207 to contact the first fixed contact 205, thereby connecting the power supply. The conductive core 203 inside the heating tape 201 begins to conduct electricity, realizing the purpose of heating the heating tape 202. Then, the heat on the heating tape 202 is transferred to the cable body 1 through the heating tape 201, improving the characteristics of the cable body 1, such as high brittleness when cold, difficulty in bending, and poor tensile strength, thereby increasing the service life of the cable body 1.

[0058] During the heating process of the heat-conducting tape 201, the airbag 305 begins to expand due to heat. The elastic sleeve 301 deforms as the airbag 305 expands, causing it to compress the elastic sleeve 301 and the elastic retainer 303. This allows the elastic retainer 303 to engage and fix with the elastic retaining block 304 on the limiting sleeve 302, thereby strengthening the connection between the elastic sleeve 301 and the limiting sleeve 302. This prevents damage to the outer sheath 1602 and inner sheath 1601 due to different tensile forces during the pulling process of the cable body 1. It also strengthens the connection between the limiting sleeve 302, the inner sheath 1601, and the outer sheath 1602, thus enhancing the fixation between the insulation layer 15 and the protective layer 16. When the airbag 305 expands to... At a certain point, the gas inside the airbag 305 will overflow, filling the first vent pipe 306, the second vent pipe 307, and the air guide pipe 308, increasing the internal pressure. The gas inside the air guide pipe 308 pushes the piston rod 310 to move closer to the fixed sleeve 1302, causing the piston rod 310 to move together with the fixed block 311 and the limiting block 312. This causes the fixed block 311 and the limiting block 312 to engage in the fixing groove on the surface of the fixed sleeve 1302, enhancing the connection between the elastic sleeve 301 and the fixed sleeve 1302. This strengthens the fixation between the fixed layer 13 and the protective layer 16, preventing uneven stress between layers due to gaps when pulling the cable, thus enhancing the tensile strength of the cable body 1.

[0059] Example 3

[0060] While the above embodiments ensure that the cable body 1 operates normally in low-temperature environments and achieves a tighter bond between the cable layers, at high temperatures, the gas inside the air bladder 305 expands due to heat. This further strengthens the bond between the cable layers, but also exerts a thrust on the outer sheath 1602. Combined with the hot weather, this increases the risk of cracking in the outer sheath 1602. Therefore, modifications are made to the technical solution based on Embodiment 1, and the modified technical solution is as follows.

[0061] Reference Figures 1 to 12 A high current-carrying, high-insulation, mobile rubber-sheathed flexible cable without vulcanization, the temperature regulating component 2 includes a heat-conducting tape 201 arrayed on a fixed layer 13, a heating tape 202 disposed inside the heat-conducting tape 201, a conductive core 203 disposed on the heating tape 202, parallel spacers 210 fixedly disposed on the surface of the heat-conducting tape 201 and electrically connected to the conductive core 203 and arranged in an array, and a controller 204 fixedly disposed at one end of the heat-conducting tape 201.

[0062] Specifically, the compression and tension assemblies 3 include an elastic sleeve 301, a limiting sleeve 302 fixedly disposed on the surface of the elastic sleeve 301, and an airbag 305 disposed inside the elastic sleeve 301 above the parallel partition 210 and arranged in an array. A first vent pipe 306 and a second vent pipe 307 are fixedly disposed on the surface of the airbag 305. A guide pipe 308 is fixedly disposed on the surface of the second vent pipe 307, and a control valve 309 is fixedly disposed on the surface of the guide pipe 308.

[0063] Specifically, the controller 204 has a potential groove, and a bimetallic strip 207 is fixedly installed inside the potential groove. A first movable contact 208 and a second movable contact 209 are respectively provided at the upper and lower ends of the bimetallic strip 207. The potential groove has a first fixed contact 205 and a second fixed contact 206 corresponding to the first movable contact 208 and the second movable contact 209. The first fixed contact 205 is located below the first movable contact 208, and the second fixed contact 206 is located above the second movable contact 209.

[0064] Specifically, the airbag 305 has an elastic element 7 inside, a secondary contact 5 at the bottom of the airbag 305, a primary contact 4 at the bottom of the secondary contact 5, and a receiving groove 6 on the outer surface of the parallel partition 210 that matches the primary contact 4 and the secondary contact 5.

[0065] The airbag 305 is filled with nitrogen; the elastic element 7 is a spring, and a pressure sensor is provided at the connection between the elastic element 7 and the airbag 305.

[0066] In the initial state, the first movable contact 208 on the bimetallic strip 207 is not in contact with the first fixed contact 205, and the second movable contact 209 on the bimetallic strip 207 is not in contact with the second fixed contact 206; the primary contact 4 is in contact with the receiving groove 6; the elastic element 7 is in a normal state (not compressed, not stretched); the control valve 309 on the air duct 308 is in an open state, and the gas in the airbag 305 cannot overflow through the control valve 309 on the air duct 308.

[0067] It should be noted that the cable in this embodiment is located outdoors, that is, a section of cable that has to be left outdoors when laying the cable.

[0068] When the weather is cold, the nitrogen gas inside the airbag 305 contracts due to the cold. Since the top of the airbag 305 is fixedly connected to the side of the cavity inside the elastic sleeve 301 near the outer sheath 1602, the first-level contact 4 gradually separates from the receiving slot 6, and the elastic element 7 inside the airbag 305 is compressed. At this time, since the adjacent airbags 305 are connected by the first vent pipe 306 and the second vent pipe 307, the gas in the airbag 305 at the higher temperature flows to the airbag 305 at the lower temperature through the first vent pipe 306 and the second vent pipe 307, which replenishes the gas in the airbag 305 at the lower temperature. This keeps the expansion or contraction of the airbags 305 on the elastic sleeve 301 in a relatively balanced state, avoiding local damage to the inside of the cable body 1 due to uneven stress, thereby improving the tensile strength of the cable body 1.

[0069] As the temperature continues to drop, the bimetallic strip 207 deflects, causing the first movable contact 208 to deflect towards the first fixed contact 205. Ultimately, the first movable contact 208 on the bimetallic strip 207 comes into contact with the first fixed contact 205, thereby energizing the conductive core 203 inside the heating tape 201 and the heating band 202 simultaneously. The control valve 309 on the air duct 308 closes. Since the parallel spacer 210 and the heating band 202 are connected in parallel through the conductive core 203, the parallel spacer 210 can work synchronously after the conductive core 203 is energized (the parallel spacer 210 serves as a signal transmission device).

[0070] After being energized, the heating band 202 begins to heat up. The heating band 202 transfers heat to the cable body 1 through the heat conduction tape 201, which improves the characteristics of the cable body 1, such as high brittleness when cold, difficulty in bending, and poor tensile strength. During the heating process of the heating band 202, the gas inside the air bladder 305 begins to expand due to the heat. At the same time, since the elastic element 7 is in a compressed state when the air bladder 305 contracts, the pressure sensor on the elastic element 7 changes its value due to the pressure.

[0071] During the heating process of the gas inside the airbag 305, the control valve 309 on the air duct 308 is in the closed state, which causes the pressure inside the airbag 305 to change. The elastic element 7 inside the airbag 305 gradually returns to its initial state. Under the elastic restoring force of the elastic element 7, the speed at which the airbag 305 returns to its initial state is accelerated. During the recovery process of the airbag 305, a negative pressure is generated inside the airbag 305 (at this time, the original gas inside the airbag 305 is still in a contracted state and is less affected by the heating of the heating band 202). This allows the gas between two adjacent heating bands 202 to be drawn into the airbag 305 through the control valve 309. After the elastic element 7 returns to its initial state, the external control system controls the control valve 309 on the air duct 308 to open again, so that the gas stored inside the airbag 305 is greater than the gas capacity in the initial state, thereby increasing the expansion of the airbag 305 after heating.

[0072] As the heating band 202 continues to operate, the gas inside the airbag 305 begins to expand, causing the airbag 305 to expand synchronously. This causes the airbag 305 to drive the secondary contact 5 to contact the receiving slot 6 on the parallel spacer 210. After the secondary contact 5 contacts the receiving slot 6, the external control system controls the bimetallic strip 207 to drive the first moving contact 208 to disengage from the first fixed contact 205, causing the bimetallic strip 207 to return to its initial position. This stops the heating band 202 from heating, preventing the heating band 202 from heating for too long, which could cause an excessive temperature difference between this section of the cable and the other sections, leading to physical deformation and stress concentration in the insulation layer 12 and the risk of the insulation layer 12 cracking.

[0073] After the airbag 305 drives the secondary contact 5 to contact the receiving slot 6 on the parallel partition 210, the airbag 305 will still expand for a period of time under the residual heat of the heating band 202. At this time, the elastic sleeve 301 will deform as the airbag 305 expands, so the airbag 305 will squeeze the elastic sleeve 301 and the elastic seat 303, thereby making the elastic seat 303 engage and fix with the elastic block 304 on the limiting sleeve 302, thereby strengthening the connection between the elastic sleeve 301 and the limiting sleeve 302, and preventing the outer sheath 1602 and the inner sheath 1601 from being damaged due to the different tensile forces borne by the outer sheath 1602 and the inner sheath 1601 during the pulling process of the cable body 1, thereby strengthening the connection between the limiting sleeve 302, the inner sheath 1601 and the outer sheath 1602, and thus strengthening the fixation between the insulation layer 15 and the protective layer 16.

[0074] When the weather is hot, the nitrogen gas inside the airbag 305 expands due to heat. The gas inside the airbag 305 at the higher temperature flows through the first vent pipe 306 and the second vent pipe 307 to the airbag 305 at the lower temperature, achieving a certain degree of cooling. This prevents the airbag 305 from over-expanding and squeezing the protective layer 16 of the cable body 1, which would cause cracks on the surface of the protective layer 16 and reduce the insulation of the cable body 1.

[0075] As the airbag 305 gradually expands, the secondary contact 5 gradually contacts the receiving slot 6. The elastic element 7 inside the airbag 305 is stretched. As the temperature continues to rise, the bimetallic strip 207 deflects. The bimetallic strip 207 drives the second moving contact 209 to deflect towards the second fixed contact 206. Finally, the second moving contact 209 on the bimetallic strip 207 contacts the second fixed contact 206. Since the parallel spacer 210 and the conductive core 203 are electrically connected through a parallel circuit, after the second moving contact 209 contacts the second fixed contact 206, the conductive core 203 inside the heating tape 201 is energized while the heating tape 202 is not energized. At this time, the control system can detect the part of the cable where the secondary contact 5 contacts the receiving slot 6 to obtain the overheated area of ​​the cable, so that the staff can carry out cooling operations on the overheated area of ​​the cable.

[0076] If staff cannot arrive in time, the external control system closes the control valve 309 on the air duct 308. At this time, gas in the airbag 305 can overflow through the control valve 309 on the air duct 308. Because the control valve 309 on the air duct 308 is closed, the pressure inside the airbag 305 changes, and the elastic element 7 inside the airbag 305 gradually returns to its initial state. Under the elastic restoring force of the elastic element 7, the speed at which the airbag 305 returns to its initial state is accelerated. During the recovery process of the airbag 305, positive pressure is generated inside the airbag 305. Part of the gas inside the airbag 305 is discharged to the area between two adjacent heating zones 202. Since the gas inside the airbag 305 is an inert gas that expands when heated, such as nitrogen, the inert gas fills the interior of the cable body 1. On the one hand, this prevents the airbag 305 from over-expanding and squeezing the protective layer 16 of the cable body 1, which would cause the surface of the protective layer 16 to crack and reduce the insulation of the cable body 1. On the other hand, the inert gas filling the interior of the cable body 1 allows the inert gas to be ejected from the ignition point to extinguish the fire when a fire occurs.

[0077] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable, characterized in that: The cable includes a cable body (1), which includes a cable core (11). An insulation layer (12) is provided on the surface of the cable core (11). The outer wall of the insulation layer (12) is provided with a fixing layer (13), a filling layer (14), a heat insulation layer (15), and a protective layer (16). The fixing layer (13) includes a fixing sleeve (1302) connected to the heat insulation layer (15) and a fixing bracket (1301) located inside the fixing sleeve (1302). The protective layer (16) includes an inner sheath (1601), a tensile strip (1603), and an outer sheath (1602) fixedly arranged from the inside to the outside. A temperature regulating component (2) is provided inside the heat insulation layer (15). A compression and tensile component (3) is provided inside the protective layer (16). The temperature regulating component (2) includes a heat conduction tape (201) arrayed on a fixed layer (13), a heating band (202) is provided inside the heat conduction tape (201), a conductive core (203) is provided on the heating band (202), and parallel spacers (210) arrayed on the surface of the heat conduction tape (201). The parallel spacers (210) and the conductive core (203) are electrically connected through a parallel circuit. A controller (204) arrayed on one end of the heat conduction tape (201) is fixedly provided. The compression and tension resistant component (3) includes an elastic sleeve (301), a limiting sleeve (302) is fixedly provided on the surface of the elastic sleeve (301), and an airbag (305) is provided inside the elastic sleeve (301) located above the parallel partition (210) and arranged in an array. A first vent pipe (306) and a second vent pipe (307) are fixedly provided on the surface of the airbag (305), a guide pipe (308) is fixedly provided on the surface of the second vent pipe (307), and a control valve (309) is fixedly provided on the surface of the guide pipe (308). The controller (204) is provided with a potential groove, and a bimetallic strip (207) is fixedly installed inside the potential groove. A first movable contact (208) and a second movable contact (209) are respectively provided at the upper and lower ends of the bimetallic strip (207). A first fixed contact (205) and a second fixed contact (206) corresponding to the first movable contact (208) and the second movable contact (209) are provided inside the potential groove. The first fixed contact (205) is located below the first movable contact (208), and the second fixed contact (206) is located above the second movable contact (209).

2. The vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable according to claim 1, characterized in that: The airbags (305) distributed along the axial direction of the elastic sleeve (301) are interconnected through the first vent pipe (306), and the airbags (305) distributed circumferentially along the fixing frame (1301) are interconnected through the second vent pipe (307). The first vent pipe (306) and the second vent pipe (307) connect the airbags (305) distributed on the elastic sleeve (301) into a whole.

3. The vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable according to claim 1, characterized in that: The airbag (305) has an elastic element (7) inside, a secondary contact (5) is provided at the bottom of the airbag (305), a primary contact (4) is provided at the bottom of the secondary contact (5), and a receiving groove (6) matching the primary contact (4) and the secondary contact (5) is provided on the outer surface of the parallel partition (210).

4. The vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable according to claim 1, characterized in that: The elastic sleeve (301) has an array of through grooves on its surface. An elastic seat (303) is fixedly installed inside the through groove. An elastic block (304) is fixedly installed on the inner wall of the limiting sleeve (302). The elastic block (304) is movably engaged inside the elastic seat (303). The elastic block (304) is adapted to the elastic seat (303). The elastic sleeve (301) has an array of cavities corresponding to the through grooves inside its surface. The airbag (305) is movably installed inside the cavity.

5. The vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable according to claim 1, characterized in that: One end of the air guide tube (308) is elastically connected to a piston rod (310). The piston rod (310) is located inside the air guide tube (308). The piston rod (310) is slidably connected to the air guide tube (308) by a spring. One end of the piston rod (310) is fixedly provided with a fixing block (311). A limit block (312) is fixedly provided on the surface of the fixing block (311). A fixing groove is provided at the position where the fixing block (311) is connected to the fixing sleeve (1302).

6. The vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable according to claim 1, characterized in that: There are multiple cable cores (11), and the multiple cable cores (11) are fixedly arranged between the fixing frame (1301) and the fixing sleeve (1302). The cable cores (11) are adapted to the fixing frame (1301) and the fixing sleeve (1302). A limiting groove is provided at the position where the cable cores (11) are connected to the fixing frame (1301).

7. The vulcanization-free, high current-carrying, high-insulation, mobile rubber-sheathed flexible cable according to claim 1, characterized in that: The tensile strip (1603) is fixedly disposed between the inner sheath (1601) and the outer sheath (1602). The surface of the inner sheath (1601) is provided with a tensile groove extending in a spiral shape. The tensile strip (1603) is fixedly disposed inside the tensile groove. The inner sheath (1601) is fixedly disposed on the surface of the limiting sleeve (302).

Images