Low-temperature-resistant flexible cable
By introducing positioning components and low-temperature resistant materials into flexible cables, the problems of conductor misalignment and wear in flexible cables during long-distance use have been solved, thereby improving the stability and durability of the cables.
Patent Information
- Application Number
- CN202610090056.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-22
- Publication Date
- 2026-03-03
AI Technical Summary
When flexible cables are dragged, suspended, or twisted over long distances, the internal conductor cores are prone to radial displacement, leading to cable deformation and wear of the outer sheath, which affects safety.
The positioning components, including a buffer skeleton and fixing parts, are used to fix the single core bundle through an insertion and snap-fit structure, ensuring that the cable maintains a uniform circumferential arrangement during dragging, twisting, and suspension. Axial clamping and radial positioning are achieved through wrapping, and Kevlar fiber and ultra-fine oxygen-free copper wire are used to improve the cable's low-temperature resistance and flexibility.
It effectively prevents the conductor core from shifting radially when the cable is dragged, twisted, or suspended, maintains the stability of the cable structure, enhances low-temperature resistance, avoids localized wear, and improves the safety and durability of the cable.
Smart Images
Figure CN121601319A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cable technology, specifically to a low-temperature resistant flexible cable. Background Technology
[0002] Cables are the "blood vessels" of the power and electronics industries. Composed of one or more insulated conductor cores, an outer insulation layer, and a sheath, they are bundled conductors capable of safely and stably transmitting power, control signals, and communication signals in complex environments such as overhead, underground, cable trays, pipelines, and humid conditions. They are the core carriers for power distribution, equipment linkage, and data communication. Flexible cables, also known as high-flexibility cables, drag chain cables, or flexible drag cables, are a special category of cables designed to address working conditions requiring frequent bending, movement, twisting, and dragging.
[0003] In existing technologies, multiple conductors inside a flexible cable are arranged in a circular pattern and then secured with a wrapping tape. However, the fixing force of the wrapping tape is an axial clamping force, lacking a radial positioning force. When the cable is dragged, suspended, or twisted over a long distance, the internal conductors are prone to radial displacement, with some conductors being squeezed to the outside and others to the inside, causing cable deformation. This leads to easy wear of the cable's outer sheath in certain areas, thus affecting the safety of the flexible cable.
[0004] Therefore, we propose a low-temperature resistant flexible cable to address the problems mentioned in the background section. Summary of the Invention
[0005] The purpose of this invention is to provide a low-temperature resistant flexible cable to solve the problem mentioned in the background art that when flexible cables are dragged, suspended, or twisted over long distances, the internal conductor cores are easily radially offset, with some cores being squeezed to the outside and some to the inside, causing cable deformation, which in turn leads to easy wear of the cable's outer sheath and thus affects the safety of the flexible cable.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature resistant flexible cable, comprising: a cable assembly, wherein a positioning component is provided inside the cable assembly, the positioning component comprising a base component and a fixing component; The basic component includes a buffer frame, and a flexible rubber sleeve is fixedly connected to the outer surface of the buffer frame. The outer surface of the flexible rubber sleeve has multiple insertion holes, and the outer surface of the buffer frame has multiple fixing grooves. The fixing component includes a fixed ring and a movable ring. A first ratchet is fixedly installed at one end of the movable ring, and a second ratchet is fixedly installed on the inner wall of the fixed ring, with the second ratchet meshing with the first ratchet. A fixing block is fixedly installed on the outer surface of the fixed ring, and three slots are provided at the top and bottom of the fixing block. A first flexible pad and a second flexible pad are fixedly connected to the inner walls of the fixed ring and the movable ring, respectively.
[0007] Preferably, limiting grooves are provided on both sides of the interior of the plurality of fixing grooves, two sliding grooves are provided on both sides of the interior of the plurality of fixing grooves, two movable plates are movably embedded in the interior of the plurality of fixing grooves, three springs are fixedly connected to one outer surface of the plurality of movable plates, and three fixing posts are fixedly installed on the other outer surface of the plurality of movable plates.
[0008] Preferably, slide rods are fixedly installed on both outer surfaces of the multiple movable plates, and the multiple springs are grouped into sets of three adjacent springs. One end of each set of springs is fixedly installed on opposite sides inside multiple fixed grooves, and one end of each slide rod is movably embedded inside multiple slide grooves.
[0009] Preferably, the other end of the movable ring is movably embedded inside the fixed ring, a fixed rod is movably embedded inside the movable ring, the two ends of the fixed rod are respectively fixedly installed on both sides inside the fixed ring, the outer surface of the fixed block is movably embedded inside the insertion hole, the fixed groove and the limiting groove, and one end of the fixed post is movably embedded inside the card slot.
[0010] Preferably, the cable assembly includes a tensile central reinforcing core, the outer surface of which is provided with a filling layer, the outer surface of which is provided with a plurality of flexible single-core conductors, the outer surface of which is provided with a flexible insulation layer, and the outer surface of which is provided with a wrapping layer.
[0011] Preferably, the inner surface of the wrapping layer is provided with a heat-insulating filler, the outer surface of the wrapping layer is provided with a flexible shielding layer, the outer surface of the flexible shielding layer is provided with a low-temperature resistant layer, the outer surface of the low-temperature resistant layer is provided with a flame-retardant layer, and the outer surface of the flame-retardant layer is provided with a flexible outer protective layer.
[0012] Preferably, the tensile central reinforcing core is made of Kevlar fiber, which bears the axial tensile force, radial torsional force, and bending tension of the cable, disperses bending stress, and maintains the structural stability of the cable. The filling layer is made of flexible polyester fiber and is located between the base component and the tensile central reinforcing core to protect the tensile central reinforcing core.
[0013] Preferably, the flexible single-core conductor is made of ultra-fine oxygen-free copper wire, the flexible insulation layer is made of silicone rubber material to insulate and isolate the flexible single-core conductor, the thermal insulation filler is made of polyurethane foam, which is soft and elastic, provides low-temperature thermal insulation, and protects the flexible single-core conductor, and the wrapping layer is made of polyester non-woven fabric, which binds the single-core bundle composed of multiple flexible single-core conductors and the thermal insulation filler into a tight cable core bundle.
[0014] Preferably, the flexible shielding layer is made of tin-plated copper strip wrapping and copper wire braiding, which is fully flexible, bend-resistant, and provides double-layer shielding to isolate external electromagnetic interference. The low-temperature resistant layer is made of low-temperature resistant modified polyolefin material, which is low-temperature resistant and highly elastic, enhancing the cable's low-temperature performance. The flame-retardant layer is made of halogen-free flame-retardant material, which is flame-retardant, fireproof, environmentally friendly, and halogen-free. The flexible outer sheath is made of polyether-type polyurethane to resist external wear.
[0015] Preferably, the multiple flexible single-core conductors are grouped into sets of seven adjacent flexible single-core conductors, and multiple fixing components are provided. Each set of flexible single-core conductors is located inside the multiple fixing components, and the base component is located between the filling layer and the multiple sets of flexible single-core conductors.
[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. When using this invention, the fixing component is installed on the outer surface of the base component by insertion and snap-fit structure. The single core bundle can be fixed by closing the movable ring. Multiple single core bundles are axially tightened by the wrapping layer. The fixing component radially positions the single core bundles and is firmly embedded in the positioning buckle. This ensures that the single core bundles will not deviate radially during the cable dragging, twisting, and hanging process and will always maintain a uniform circumferential arrangement. The first and second flexible pads are both highly elastic soft layers. The single core bundles can make slight independent sliding or deformation in the positioning buckle, which is beneficial for buffering and dispersing the tensile or compressive stress generated by bending.
[0017] 2. When using this invention, the fixing components can be selected according to the number of single-core bundles to avoid unnecessary fixing components being left unused. The fixing components are spirally distributed, forming a spiral staggered fixing of multiple single-core bundles, ensuring that the gap between multiple single-core bundles remains uniform. When the phase cable is bent, the stress will be evenly distributed to the entire cable along the diagonal direction of the spiral, without any local jamming points or stress concentrations, which is beneficial for each section of the single-core bundle to be evenly stressed.
[0018] 3. In this invention, the tensile-strength central reinforcing core uses Kevlar fiber for shaping and deformation prevention. The flexible single-core conductor uses ultra-fine oxygen-free copper wire and a multi-bundle twisting process, resulting in high bending resistance. The thermal insulation filler uses polyurethane foam to provide flexible protection for the single-core bundles. The wrapping layer tightly binds all internal core bundles and inner structure into a compact cable core. The flexible shielding layer uses tinned copper tape wrapping and copper wire braiding for double-layer shielding. The low-temperature resistant layer uses low-temperature modified polyolefin material to enhance the cable's low-temperature resistance. The flame-retardant layer is flame-retardant, fireproof, environmentally friendly, and halogen-free. The flexible outer sheath is the outermost layer of the cable, the final physical protective barrier for all structures, providing comprehensive protection against external damage. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of a low-temperature resistant flexible cable according to the present invention; Figure 2 This is a cross-sectional schematic diagram of the basic component in a low-temperature resistant flexible cable according to the present invention; Figure 3 This is a cross-sectional schematic diagram of the flexible rubber sheath in a low-temperature resistant flexible cable according to the present invention; Figure 4 This is a cross-sectional schematic diagram of the positioning component in a low-temperature resistant flexible cable according to the present invention; Figure 5 This is a schematic diagram showing the structure of a fixing component in a low-temperature resistant flexible cable according to the present invention. Figure 6 This is a schematic diagram of the internal structure of the fixing groove in a low-temperature resistant flexible cable according to the present invention; Figure 7 This is a cross-sectional schematic diagram of the fixing ring structure in a low-temperature resistant flexible cable according to the present invention.
[0020] In the picture: 1. Cable assembly; 101. Tensile-resistant central reinforcing core; 102. Filler layer; 103. Flexible single-core conductor; 104. Flexible insulation layer; 105. Thermal insulation filler; 106. Wrapping layer; 107. Flexible shielding layer; 108. Low-temperature resistant layer; 109. Flame-retardant layer; 110. Flexible outer sheath; 2. Positioning assembly; 21. Base component; 2101. Buffer skeleton; 2102. Flexible rubber sleeve; 2103. Socket; 210 4. Fixed groove; 2105. Limiting groove; 2106. Slide groove; 2107. Moving plate; 2108. Spring; 2109. Fixed column; 2110. Slide rod; 22. Fixed component; 2201. Fixed ring; 2202. Moving ring; 2203. First flexible pad; 2204. Second flexible pad; 2205. First ratchet; 2206. Second ratchet; 2207. Fixed rod; 2208. Fixed block; 2209. Slot. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Example 1: Please refer to Figures 1-7As shown, the present invention provides a technical solution: a low-temperature resistant flexible cable, comprising: a cable assembly 1, wherein a positioning component 2 is disposed inside the cable assembly 1, the positioning component 2 comprising a base component 21 and a fixing component 22; the base component 21 comprises a buffer skeleton 2101, a flexible rubber sleeve 2102 is fixedly connected to the outer surface of the buffer skeleton 2101, the outer surface of the flexible rubber sleeve 2102 is provided with a plurality of insertion holes 2103, and the outer surface of the buffer skeleton 2101 is provided with a plurality of fixing grooves 2104; the fixing component 22 comprises a fixing ring 2 201 and a movable ring 2202. A first ratchet 2205 is fixedly installed at one end of the movable ring 2202. A second ratchet 2206 is fixedly installed on the inner wall of the fixed ring 2201, and the second ratchet 2206 is engaged with the first ratchet 2205. A fixing block 2208 is fixedly installed on the outer surface of the fixed ring 2201. Three slots 2209 are opened at the top and bottom of the fixing block 2208. A first flexible pad 2203 and a second flexible pad 2204 are fixedly connected to the inner walls of the fixed ring 2201 and the movable ring 2202, respectively. Each of the multiple fixing slots 2104 has a limiting slot 2105 on both sides, and two sliding grooves 2106 on both sides. Two movable plates 2107 are movably embedded inside each of the multiple fixing slots 2104. Three springs 2108 are fixedly connected to one outer surface of each movable plate 2107, and three fixing posts 2109 are fixedly installed on the other outer surface of each movable plate 2107. Sliding rods 2110 are fixedly installed on both outer surfaces of each movable plate 2107. Each set of three adjacent springs 2108 forms a group, and one end of each group of springs 2108 is fixedly installed on opposite sides inside the multiple fixing slots 2104. One end of each sliding rod 2110 is movably embedded inside the multiple sliding grooves 2106. The other end of the movable ring 2202 is movably embedded inside the fixed ring 2201. A fixing rod 2207 is movably embedded inside the movable ring 2202. The two ends of the fixing rod 2207 are respectively fixedly installed on both sides inside the fixed ring 2201. The outer surface of the fixing block 2208 is movably embedded inside the insertion hole 2103, the fixing groove 2104, and the limiting groove 2105. One end of the fixing post 2109 is movably embedded inside the slot 2209. Multiple flexible single-core conductors 103 are grouped into sets of seven adjacent flexible single-core conductors 103. Multiple fixing components 22 are provided. Each set of flexible single-core conductors 103 is located inside multiple fixing components 22. The base component 21 is located between the filling layer 102 and the multiple sets of flexible single-core conductors 103.
[0023] In this embodiment, during use, seven adjacent flexible single-core conductors 103 are bundled into a single core, forming a single-core bundle. Multiple sets of single-core bundles are distributed circumferentially around the outer surface of the base component 21, such as... Figure 1 and Figure 2As shown. Multiple fixing components 22 are provided. The fixing components 22 are placed in the corresponding insertion holes 2103 according to the required fixing distance. One side of the fixing block 2208 is arc-shaped. The fixing block 2208 is inserted into the limiting groove 2105 through the insertion hole 2103. During this process, the upper and lower corresponding fixing posts 2109 first contact the arc-shaped surface of the fixing block 2208 and are pushed by the arc-shaped surface. The fixing posts 2109 push the moving plate 2107 to move, gradually compressing the spring 2108. At the same time, the fixing posts 2109 slide along the arc-shaped surface to the slot 2209. Under the elastic force of the spring 2108, the fixing posts 2109 are pushed into the slot 2209. By simply inserting the locking structure, the fixing component 22 can be installed onto the outer surface of the base component 21. After placing the single core bundle into the fixing ring 2201, the movable ring 2202 is rotated into the interior of the fixing ring 2201, so that the first ratchet 2205 and the second ratchet 2206 engage and connect, thereby fixing the single core bundle to the outer surface of the filling layer 102. The multiple single core bundles are axially tightened by wrapping the layer 106. The fixing component 22 radially positions the single-core bundle and is firmly embedded in the positioning buckle composed of the fixing ring 2201 and the movable ring 2202. This ensures that the single-core bundle will not radially shift or loosen during the cable's dragging, twisting, and suspension processes, and will always maintain a uniform circumferential distribution. The first flexible pad 2203 and the second flexible pad 2204 are both highly elastic soft layers, allowing the single-core bundle to make slight independent sliding or deformation within the positioning buckle. It is no longer a rigid hoop as a whole. Each positioning buckle is an independent stress buffer point, which helps to buffer and disperse the tensile or compressive stress generated by bending. This solves the problem that when flexible cables are dragged, suspended, or twisted over long distances, the internal conductor cores are easily radially shifted, with some cores being squeezed to the outside and some to the inside, causing cable deformation and resulting in easy wear of the cable's outer sheath, thus affecting the safety of the flexible cable.
[0024] Furthermore, the fixing component 22 and the base component 21 adopt a separate design. The number of fixing components 22 can be selected according to the number of single-core bundles, avoiding unnecessary fixing components 22 being left unused. The fixing components 22 can be selected to fix multiple single-core bundles at the same water level position, or they can be spirally distributed to form a spiral staggered fixing of multiple single-core bundles, such as... Figure 3 and Figure 4 As shown, the gaps between multiple single-core bundles are always kept uniform, and the adjacent fixing buckles are misaligned in the axial direction. When the cable is bent, the stress will be evenly distributed to the entire cable along the diagonal direction of the spiral. There are no local jamming points or any stress concentration, which is conducive to the uniform stress on each single-core bundle.
[0025] Example 2: Figures 1-2As shown, the cable assembly 1 includes a tensile-strength central reinforcing core 101. A filling layer 102 is disposed on the outer surface of the tensile-strength central reinforcing core 101. Multiple flexible single-core conductors 103 are disposed on the outer surface of the filling layer 102. A flexible insulation layer 104 is disposed on the outer surface of each flexible single-core conductor 103. A wrapping layer 106 is disposed on the outer surface of the flexible single-core conductor 103. An insulating filler 105 is disposed inside the wrapping layer 106. A flexible shielding layer 107 is disposed on the outer surface of the wrapping layer 106. A low-temperature resistant layer 108 is disposed on the outer surface of the flexible shielding layer 107. A flame-retardant layer 109 is disposed on the outer surface of the low-temperature resistant layer 108. A flexible outer sheath 110 is disposed on the outer surface of the flame-retardant layer 109. The tensile-strength central reinforcing core 101 is made of Kevlar fiber, which bears the axial tensile force, radial torsional force, and bending tension of the cable, disperses bending stress, and maintains the structural stability of the cable. The filler layer 102 is made of flexible polyester fiber and is located between the base component 21 and the tensile-strength central reinforcing core 101 to protect the tensile-strength central reinforcing core 101. The flexible single-core conductor 103 is made of ultra-fine oxygen-free copper wire, and the flexible insulation layer 104 is made of silicone rubber material to insulate and isolate the flexible single-core conductor 103. The thermal insulation filler 105 is made of polyurethane foam, which is soft and elastic, provides low-temperature thermal insulation, and protects the flexible single-core conductor 103. The wrapping layer 106 is made of polyester non-woven fabric, which binds the single-core bundle composed of multiple flexible single-core conductors 103 and the thermal insulation filler 105 into a tight cable core bundle. The flexible shielding layer 107 is made of tin-plated copper strip wrapping and copper wire braiding, which is fully flexible, bend-resistant, and provides double-layer shielding to isolate external electromagnetic interference. The low-temperature resistant layer 108 is made of low-temperature resistant modified polyolefin material, which is low-temperature resistant and highly elastic, enhancing the cable's low-temperature performance. The flame-retardant layer 109 is made of halogen-free flame-retardant material, which is flame-retardant, fireproof, environmentally friendly, and halogen-free. The flexible outer sheath 110 is made of polyether polyurethane to resist external abrasion.
[0026] In this embodiment, the tensile-resistant central reinforcing core 101 is made of Kevlar fiber (aramid fiber), which has high tensile strength and does not stretch or deform under heavy loads or long-distance suspension. Its tensile performance does not decrease at low temperatures, and it is highly flexible and resistant to bending. It bears the axial tension, radial torsional force, and bending tension of the cable, serving as the cable's load-bearing skeleton, shaping and preventing deformation, and ensuring the cable's roundness and concentricity. The filler layer 102 is made of flexible polyester fiber and is located between the base component 21 and the tensile-resistant central reinforcing core 101, protecting the tensile-resistant central reinforcing core 101. The flexible single-core conductor 103 uses ultra-fine oxygen-free copper wire and a multi-bundle twisting process. The oxygen-free copper has high purity, high conductivity, no stray resistance, does not generate heat, and does not attenuate signals. The ultra-fine copper wire and multi-bundle twisting process disperse stress and provide high resistance to bending cycles. Insulation filler 105, made of polyurethane foam, is used between adjacent single-core bundles to provide flexible protection, improving cable roundness while isolating them from cold external air. The wrapping layer 106 uses polyester non-woven fabric to tightly bind all internal core bundles and the inner structure into a compact cable core, preventing loose strands and displacement. The polyester non-woven fabric is ultra-thin and highly flexible, deforming synchronously with the cable when bent without hard creases or embrittlement. It remains flexible even at low temperatures and will not damage the flexible insulation layer 104 of the core bundles. The flexible shielding layer 107 uses tinned copper tape wrapping and copper wire braiding for double-layer shielding, providing strong resistance to electromagnetic interference, isolating strong external electromagnetic signals, preventing internal signal distortion, and preventing the cable's own signals from radiating outwards. The low-temperature resistant layer 108 is made of low-temperature resistant modified polyolefin material, which has excellent low-temperature resistance and enhances the low-temperature resistance of the cable. The flame-retardant layer 109 is made of halogen-free flame-retardant material, which is flame-retardant, fireproof, environmentally friendly and halogen-free, and buffers the compressive stress of the flexible outer sheath 110, protecting the inner low-temperature resistant layer 108 and the flexible shielding layer 107. The flexible outer sheath 110 is made of polyether polyurethane, which is the outermost layer of the cable and the final physical protective barrier of all structures, resisting external damage in all dimensions.
[0027] The overall effect and working principle of the mechanism are as follows: the fixing block 2208 is inserted into the limiting groove 2105 through the insertion hole 2103. The fixing column 2109 is pushed by the arc surface of the fixing block 2208, which pushes the moving plate 2107 to move and squeezes the spring 2108. When the fixing column 2109 slides to the slot 2209, the spring 2108 pushes the fixing column 2109 into the slot 2209. The fixing component 22 can be installed onto the outer surface of the base component 21 via a simple insertion method and a snap-fit structure. After placing the single-core bundle into the fixing ring 2201, the movable ring 2202 is rotated into the fixing ring 2201, causing the first ratchet 2205 and the second ratchet 2206 to engage, thereby fixing the single-core bundle to the outer surface of the filling layer 102. The multiple single-core bundles are axially tightened by the wrapping layer 106, and the fixing component 22 radially positions the single-core bundles. They are firmly embedded in the positioning buckle formed by the fixing ring 2201 and the movable ring 2202, preventing radial displacement and loosening, and maintaining a uniform circumferential arrangement. The first flexible pad 2203 and the second flexible pad 2204 are both highly elastic soft layers, allowing the single-core bundles to make slight independent sliding or deformation within the positioning buckle, which helps to buffer and disperse the tensile or compressive stress generated by bending. The fixing component 22 is spirally distributed, forming a spiral staggered fixation for the multiple single-core bundles, ensuring that the gaps between the multiple single-core bundles remain uniform. The tensile-strength central reinforcing core 101 uses Kevlar fiber to withstand the cable's axial tensile force, radial torsional force, and bending tension. The filler layer 102 uses flexible polyester fiber to protect the tensile-strength central reinforcing core 101. The flexible single-core conductor 103 uses ultra-fine oxygen-free copper wire and a multi-bundle twisting process, resulting in high bending resistance. The thermal insulation filler 105 uses polyurethane foam to provide flexible protection for the single-core bundles. The wrapping layer 106 uses polyester non-woven fabric to tightly bind all internal core bundles and the inner structure into a compact cable core. The flexible shielding layer 107 uses tinned copper tape wrapping and copper wire braiding, providing double-layer shielding and strong resistance to electromagnetic interference. The low-temperature resistant layer 108 uses low-temperature resistant modified polyolefin material to enhance the cable's low-temperature performance. The flame-retardant layer 109 uses halogen-free flame-retardant material, providing flame retardancy, fire prevention, and environmental protection. The flexible outer sheath 110 provides all-dimensional protection against external damage.
[0028] 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 low-temperature resistant flexible cable, characterized in that, include: A cable assembly (1) is provided with a positioning component (2) inside the cable assembly (1), the positioning component (2) including a base component (21) and a fixing component (22). The base component (21) includes a buffer frame (2101), and a flexible rubber sleeve (2102) is fixedly connected to the outer surface of the buffer frame (2101). The outer surface of the flexible rubber sleeve (2102) is provided with a plurality of insertion holes (2103), and the outer surface of the buffer frame (2101) is provided with a plurality of fixing grooves (2104). The fixing component (22) includes a fixing ring (2201) and a movable ring (2202). A first ratchet (2205) is fixedly installed at one end of the movable ring (2202). A second ratchet (2206) is fixedly installed on the inner wall of the fixing ring (2201), and the second ratchet (2206) meshes with the first ratchet (2205). A fixing block (2208) is fixedly installed on the outer surface of the fixing ring (2201). Three slots (2209) are provided at the top and bottom of the fixing block (2208). A first flexible pad (2203) and a second flexible pad (2204) are fixedly connected to the inner walls of the fixing ring (2201) and the movable ring (2202), respectively.
2. The low-temperature resistant flexible cable according to claim 1, characterized in that: Limiting grooves (2105) are provided on both sides inside the multiple fixing grooves (2104). Two sliding grooves (2106) are provided on both sides inside the multiple fixing grooves (2104). Two movable plates (2107) are movably embedded inside the multiple fixing grooves (2104). Three springs (2108) are fixedly connected to one outer surface of the multiple movable plates (2107). Three fixing posts (2109) are fixedly installed on the other outer surface of the multiple movable plates (2107).
3. The low-temperature resistant flexible cable according to claim 2, characterized in that: Each of the multiple movable plates (2107) has a slide rod (2110) fixedly installed on both outer surfaces. Each of the multiple springs (2108) consists of three adjacent springs (2108). One end of each set of springs (2108) is fixedly installed on the opposite side inside the multiple fixed grooves (2104). One end of each slide rod (2110) is movably embedded inside the multiple slide grooves (2106).
4. The low-temperature resistant flexible cable according to claim 3, characterized in that: The other end of the movable ring (2202) is movably embedded inside the fixed ring (2201). A fixed rod (2207) is movably embedded inside the movable ring (2202). The two ends of the fixed rod (2207) are respectively fixedly installed on both sides inside the fixed ring (2201). The outer surface of the fixed block (2208) is movably embedded inside the insertion hole (2103), the fixed groove (2104), and the limiting groove (2105). One end of the fixed post (2109) is movably embedded inside the card slot (2209).
5. The low-temperature resistant flexible cable according to claim 4, characterized in that: The cable assembly (1) includes a tensile central reinforcing core (101), the outer surface of which is provided with a filling layer (102), the outer surface of which is provided with a plurality of flexible single-core conductors (103), the outer surface of which is provided with a flexible insulation layer (104), and the outer surface of which is provided with a wrapping layer (106).
6. The low-temperature resistant flexible cable according to claim 5, characterized in that: The wrapping layer (106) is provided with a thermal insulation filler (105) inside, a flexible shielding layer (107) is provided on the outer surface of the wrapping layer (106), a low temperature resistant layer (108) is provided on the outer surface of the flexible shielding layer (107), a flame retardant layer (109) is provided on the outer surface of the low temperature resistant layer (108), and a flexible outer protective layer (110) is provided on the outer surface of the flame retardant layer (109).
7. The low-temperature resistant flexible cable according to claim 6, characterized in that: The tensile center reinforcing core (101) is made of Kevlar fiber, which bears the axial tensile force, radial torsional force, and bending tension of the cable, disperses bending stress, and maintains the structural stability of the cable. The filling layer (102) is made of flexible polyester fiber and is located between the base component (21) and the tensile center reinforcing core (101) to protect the tensile center reinforcing core (101).
8. The low-temperature resistant flexible cable according to claim 7, characterized in that: The flexible single-core conductor (103) is made of ultra-fine oxygen-free copper wire, the flexible insulation layer (104) is made of silicone rubber material to insulate and isolate the flexible single-core conductor (103), the thermal insulation filler (105) is made of polyurethane foam, which is soft and elastic, provides low-temperature thermal insulation, and protects the flexible single-core conductor (103), and the wrapping layer (106) is made of polyester non-woven fabric to bind the single-core bundle composed of multiple flexible single-core conductors (103) and the thermal insulation filler (105) into a tight cable core bundle.
9. The low-temperature resistant flexible cable according to claim 8, characterized in that: The flexible shielding layer (107) is made of tin-plated copper strip wrapping and copper wire braiding, which is fully flexible, bend-resistant, and double-layer shielding to isolate external electromagnetic interference. The low-temperature resistant layer (108) is made of low-temperature resistant modified polyolefin material, which is low-temperature resistant and highly elastic, enhancing the low-temperature performance of the cable. The flame-retardant layer (109) is made of halogen-free flame-retardant material, which is flame-retardant, fireproof, environmentally friendly and halogen-free. The flexible outer sheath (110) is made of polyether polyurethane to resist external wear.
10. The low-temperature resistant flexible cable according to claim 9, characterized in that: The multiple flexible single-core conductors (103) are grouped into groups of seven adjacent flexible single-core conductors (103). Multiple fixing components (22) are provided. Each group of flexible single-core conductors (103) is located inside the multiple fixing components (22). The base component (21) is located between the filling layer (102) and the multiple groups of flexible single-core conductors (103).