Multi-layer shielding composite cable for high-speed rail gap bridge and wire drawing device

Abstract

The invention discloses a multi-layer shielding composite cable and wire drawing device for a high-speed rail gap bridge, and the cable comprises an outer protection layer, the outer protection layer is sequentially provided with a second shielding layer, a shielding isolation layer, a first shielding layer and an inner sheath in a nesting manner from outside to inside, and the inner side of the inner sheath is provided with a power cable core, an optical fiber cable core and a signal cable core in a circumferential array manner. The power wire core adopts a wire drawing device to prepare copper wires, the wire drawing device comprises a wire drawing cabinet and copper materials, a plurality of partition plates are installed on the inner side of the wire drawing cabinet and divide the wire drawing cabinet into a plurality of cavities, a wire drawing assembly is arranged in each cavity, two tension adjusting assemblies are arranged in each cavity, and broken wire clamping assemblies are arranged on the partition plates. The multiple chambers are different in temperature and are matched with the temperature-adjustable cooling liquid spray head, gradient cooling is achieved, copper material tension adjustment and abnormal protection are achieved through mutual cooperation of the wire drawing assembly, the tension adjusting assembly and the broken wire clamping assembly, and the continuous and stable wire drawing process is ensured.

Description

Technical Field

[0001] This invention relates to the field of composite cable technology, and in particular to multi-layer shielded composite cables for high-speed railway bridge crossings and a wire drawing device. Background Technology

[0002] The multi-layer shielded composite cable for high-speed railway bridge crossings is an integrated special cable designed to withstand the harsh mechanical and electromagnetic environment encountered when high-speed railways cross bridges. Its core innovation lies in its structural design, which integrates power transmission, signal control, and data communication functions while ensuring extremely high reliability.

[0003] The power core of the multi-layer shielded composite cable used for high-speed railway bridges is made of copper wires. The main drawback of traditional wire drawing devices is their crude cooling and temperature control methods. They usually use uniform spraying or immersion, which cannot be precisely adjusted according to the heat generated by the different reduction rates of each pass. Furthermore, it is difficult to flexibly adjust the angle during the wire drawing process to optimize the flow of lubricant and the discharge of copper powder, often resulting in wire breakage. Therefore, in order to solve the above problems, a multi-layer shielded composite cable and wire drawing device for high-speed railway bridges are proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-layer shielded composite cable and wire drawing device for high-speed railway bridge crossings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The multi-layer shielded composite cable for high-speed railway bridge crossings includes an outer sheath, which is nested from the outside in with a second shielding layer, a shielding isolation layer, a first shielding layer, and an inner sheath. The inner sheath has a power core, an optical fiber core, and a signal core arranged in a circular array on its inner side. A filling layer is provided on the outside of the power core, optical fiber core, and signal core. Multiple reinforcing members are provided inside the filling layer. The power core is made of multiple copper wires hinged together, and the copper wires are prepared using a wire drawing device.

[0006] A wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges includes a wire drawing cabinet and copper materials. The inner side of the wire drawing cabinet is equipped with multiple partitions, which divide the wire drawing cabinet into several chambers. The temperature of the chambers is related to the wire drawing gradient. Each chamber is equipped with a wire drawing assembly, which includes symmetrically rotated hollow support rods. A clamping plate is fixedly connected between two hollow support rods. Multiple clamping platforms are slidably arranged in a circular array on the inner side of the clamping plate. Clamping plates are symmetrically slidably arranged on the clamping platforms. The mold body is clamped between two clamping plates. Spray nozzles are symmetrically installed on both the top and bottom sides of the clamping plate. Each chamber is equipped with two tension adjustment components. The tension adjustment components include fixed rods that are symmetrically slidably arranged, a steering plate that is rotatably arranged on the fixed rod, and a tensioning wheel that is symmetrically rotatably connected to the steering plate. There is a restoring force between the steering plate and the fixed rod. The partition is provided with a broken wire clamping assembly, which includes a symmetrically fixed limiting disk. A driving disk is rotatably connected to the outside of the limiting disk. Multiple clamping sliders are equidistantly arranged in a circumferential array between the limiting disk and the driving disk. The clamping sliders are used to clamp the copper wire when it breaks.

[0007] The above technical solution further includes: The wire drawing assembly also includes an angle adjustment motor fixedly installed on the outside of the wire drawing cabinet. The hollow support rod is rotatably connected to the wire drawing cabinet. One end of the multiple hollow support rods on one side extending to the outside of the wire drawing cabinet is symmetrically and fixedly connected to an adjustment sprocket. An adjustment chain is sleeved between two adjacent adjustment sprockets. Two adjacent adjustment chains are alternately arranged. The output end of the angle adjustment motor is fixedly installed to the middle hollow support rod.

[0008] The hollow support rod is rotatably connected to a connector, and the connector is connected to the hollow support rod. The connector is fixed to the inside of the drawing cabinet. The end of the hollow support rod near the clamping plate is connected to a liquid outlet. The top and bottom of the clamping plate are symmetrically fixed with mounting platforms. The nozzle is mounted on the mounting platform, and the liquid outlet is connected to the nozzle.

[0009] The clamping disk is rotatably connected to a spiral disk. The spiral disk and the clamping disk are slidably arranged in a circumferential array with multiple sliding plates. The ends of the multiple sliding plates that are close to each other are fixedly connected to the clamping platform. The clamping platform is rotatably connected to an adjusting screw. Two clamping plates are respectively threaded to the positive and negative threads of the adjusting screw. The clamping platform is symmetrically fixedly connected to a limiting slide rod, which slides relative to the clamping plate.

[0010] The tension adjustment assembly also includes translation slide rails. Two sets of translation slide rails are symmetrically arranged in each chamber. Each set of two translation slide rails is fixedly connected to the two inner side walls of the wire drawing cabinet, and the two sets of translation slide rails are located at different heights. Translation screws are arranged inside the multiple translation slide rails located on the same side and at the same height. The translation screws are rotatably connected to the wire drawing cabinet and the partition. Translation sprockets are fixedly connected to the ends of the two translation screws located at the same height that extend to the outside of the wire drawing cabinet. Translation chains are sleeved between the two translation sprockets. Dust baffles are arranged outside the two translation sprockets. An auxiliary motor is installed on the dust baffle. The output end of the auxiliary motor is connected to the translation screw. The two auxiliary motors are located on both sides and at different heights.

[0011] Each of the aforementioned translation slide rails has a threaded block slidably disposed on its inner side. The threaded block is threadedly connected to the translation lead screw. Two threaded blocks located in the same chamber and at the same height are fixedly connected to a fixed rod. A reversing wheel is fixedly connected to the middle of the fixed rod. Fixed plates are fixedly connected to both sides of the reversing wheel. The fixed plates and the fixed rod are rotatably connected to a steering plate. A tension torsion spring is fixedly connected to the steering plate and the fixed plates.

[0012] The broken wire clamping assembly also includes a dual-axis motor fixedly mounted on the partition plate. Both output ends of the dual-axis motor are fixedly mounted with drive gears. A clamping cylinder is fixedly connected to the inner side of the partition plate. The two limiting discs are respectively fixedly connected to the two ends of the clamping cylinder. A clamping gear ring is fixedly connected to the outer side of the drive disc. The clamping gear ring meshes with the drive gear.

[0013] The drive disk has multiple arc-shaped grooves running through its circumference, and the limiting disk has multiple straight grooves running through its circumference. The clamping slider is slidably positioned inside the arc-shaped grooves and the straight grooves, and the sides of the multiple clamping sliders that are close to each other are provided with serrations.

[0014] The copper material is arranged in an S-shape, passing through the partition and the wire drawing cabinet, and in contact with the tensioning wheel. The copper material is drawn by passing through the main body of different types of molds.

[0015] The present invention has the following beneficial effects: 1. In this invention, by dividing the wire drawing cabinet into multiple chambers with different temperatures and using adjustable temperature coolant nozzles, gradient cooling is achieved. This can accurately match the increasing heat due to the gradual increase in the single-pass surface reduction rate, effectively preventing the copper material from heating up too quickly and reducing the risk of wire breakage.

[0016] 2. In this invention, the tension adjustment component and the wire breakage clamping component work together through the tiltable mold body to adjust the tension of the copper material and protect against abnormalities. While optimizing cooling and lubrication and reducing copper powder accumulation, it ensures the continuous and stable wire drawing process and further reduces the possibility of wire breakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the multi-layer shielded composite cable for high-speed railway bridges proposed in this invention; Figure 2 This is a schematic diagram of the overall structure of the wire drawing device in this invention; Figure 3 This is a schematic diagram of the first internal structure of the wire drawing cabinet in this invention; Figure 4 This is a schematic diagram of the second internal structure of the wire drawing cabinet in this invention; Figure 5for Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point B; Figure 7 This is a partial structural diagram of the tension adjustment component in this invention; Figure 8 This is a schematic diagram of the wire drawing component in this invention; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point C; Figure 10 This is a schematic diagram of the first part of the wire drawing assembly in this invention; Figure 11 This is a schematic diagram of the second part of the wire drawing assembly in this invention; Figure 12 This is a schematic diagram of the broken wire clamping assembly structure in this invention.

[0018] In the diagram: 1. Wire drawing cabinet; 2. Angle adjusting motor; 3. Auxiliary motor; 4. Copper material; 5. Clamping cylinder; 10. Partition plate; 20. Hollow support rod; 21. Connector; 22. Clamping plate; 23. Sliding plate; 24. Liquid outlet; 25. Scroll coil; 26. Mounting platform; 27. Mold body; 28. Nozzle; 29. ​​Adjusting screw; 210. Clamping platform; 211. Limiting slide rod; 212. Clamping plate; 213. Adjusting chain; 214. Adjusting sprocket; 30. Dust baffle plate; 31. Translation slide rail; 32. Translation screw; 33. Translation chain; 34. Translation sprocket; 35. 36. Fixed rod; 37. Threaded block; 38. Steering plate; 39. Tensioning wheel; 30. Reversing wheel; 310. Tension torsion spring; 311. Fixed plate; 50. Clamping gear ring; 51. Clamping slider; 52. Dual-axis motor; 53. Drive gear; 54. Drive disc; 540. Arc-shaped slide groove; 55. Limiting disc; 550. Straight slide groove; 56. Serrated edge; 6. Outer sheath; 60. Second shielding layer; 61. Shielding isolation layer; 62. First shielding layer; 63. Inner sheath; 64. Filling layer; 65. Reinforcing member; 66. Power core; 660. Signal core; 661. Fiber optic core. Detailed Implementation

[0019] 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.

[0020] Example 1 like Figure 1 As shown, the multi-layer shielded composite cable for high-speed railway bridges proposed in this invention comprises, from the outside to the inside, a second shielding layer 60, a shielding isolation layer 61, a first shielding layer 62, and an inner sheath 63. The inner sheath 63 has a circumferential array of power cores 66, optical fiber cores 661, and signal cores 660. A filling layer 64 is provided on the outside of the power cores 66, optical fiber cores 661, and signal cores 660. Multiple reinforcing members 65 are provided inside the filling layer 64. The power cores 66 are made of multiple copper wires hinged together, and the copper wires are prepared using a wire drawing device. In this design, the outer protective layer 6 is made of low-smoke halogen-free material and serves as the outermost layer of protection. The second shielding layer 60 is a tin-plated copper wire braided strip, which mainly resists strong external electromagnetic interference from high-speed rail operation and bridge environment; The shielding isolation layer 61 is wrapped with polyester film (PET) to isolate the second shielding layer 60 and the first shielding layer 62, so as to prevent the formation of parasitic capacitance or current coupling between the two shielding layers due to potential difference, which would reduce the overall shielding effectiveness. The first shielding layer 62 uses aluminum foil shielding braided tape, which mainly shields the electromagnetic field generated by the power core 66 inside the cable from interfering with the optical fiber core 661 and signal core 660 on the side. The inner sheath 63 is made of non-woven fabric or polyester tape to provide mechanical protection and insulation for the inner components; The inner circumferential array of power cores 66 is responsible for transmitting high current power. It is made of multiple copper wires hinged together to improve flexibility and current carrying capacity. The copper wires are prepared by a wire drawing device. Fiber optic core 661 is responsible for high-speed data communication, and signal core 660 transmits control signals. The filler layer 64 fixes the position of all wire cores and ensures the roundness of the structure, while the multiple reinforcing members 65 inside provide tensile strength to withstand the mechanical stress and vibration when the high-speed rail crosses the bridge. The reinforcing member 65 can be made of nylon braided rope.

[0021] Example 2 like Figures 2-12 As shown, the wire drawing device for multi-layer shielded composite cables for high-speed railway bridges proposed in this invention includes a wire drawing cabinet 1 and a copper material 4. Multiple partitions 10 are installed on the inner side of the wire drawing cabinet 1, which divide the wire drawing cabinet 1 into several chambers. The temperature of the chambers is related to the wire drawing gradient. Each chamber is equipped with a wire drawing assembly, which includes symmetrically rotated hollow support rods 20. A clamping plate 22 is fixedly connected between two hollow support rods 20. Multiple clamping platforms 210 are slidably arranged in a circular array on the inner side of the clamping plate 22. Clamping plates 212 are symmetrically slidably arranged on the clamping platforms 210. A mold body 27 is clamped between two clamping plates 212. Spray nozzles 28 are symmetrically installed on both the top and bottom sides of the clamping plate 22. Mounting platforms 26 are symmetrically fixedly connected to the top and bottom of the clamping plate 22. The spray nozzles 28 are mounted on the mounting platforms 26 by fastening bolts. Each chamber is equipped with two tension adjustment components. The tension adjustment components include a fixed rod 35 that is symmetrically slidably arranged, a steering plate 37 that is rotatably arranged on the fixed rod 35, a tensioning wheel 38 that is symmetrically rotatably connected to the steering plate 37, and a restoring force between the steering plate 37 and the fixed rod 35. A wire breakage clamping assembly is provided on the partition plate 10. The wire breakage clamping assembly includes a symmetrically fixed limiting plate 55. A driving plate 54 is rotatably connected to the outer side of the limiting plate 55. Multiple clamping sliders 51 are equidistantly arranged in a circumferential array between the limiting plate 55 and the driving plate 54. The clamping sliders 51 are used to clamp the copper material 4 when the wire breaks.

[0022] In the wire drawing process, the wire drawing component can be adapted to various types of mold bodies 27. During the wire drawing process, the mold body 27 is tilted and coolant is sprayed out with the nozzle 28. On the one hand, it can cool the copper material 4, assist in lubrication, and reduce wear on the mold body 27. On the other hand, the tilt angle of the mold body 27 can be adjusted so that the accumulation of copper powder on the mold body 27 is reduced under the flow of coolant. Furthermore, the wire drawing gradient follows the principle of wire drawing die matching. The size gradient change of the die body 27 is not arithmetic. Therefore, the reduction rate of the single wire drawing gradually increases with each pass, and the heat generated by friction and extrusion gradually increases. The wire drawing cabinet 1 is divided into multiple chambers by the partition 10. The temperature of each chamber is different. At the same time, the temperature of the coolant sprayed by the nozzle 28 is also different, to prevent the copper material 4 from heating up too quickly during wire drawing and reduce the risk of wire breakage. Furthermore, through the tension adjustment component, when the mold body 27 is tilted, the copper material 4 will also move accordingly, adjusting the position of the two turning plates 37 in the same cavity to keep the copper material 4 in a straight state, preventing wrinkles and avoiding wire breakage. The tension adjustment component can also control the tension of the copper material 4 in real time during wire drawing. Furthermore, when a wire breakage occurs, the wire breakage clamping assembly drives multiple clamping sliders 51 to move closer to each other, clamping the copper material 4 and preventing it from flying away.

[0023] One end of the wire drawing cabinet 1 is equipped with a wire feeding machine, and the other end is equipped with a wire take-up machine. Larger copper wires enter through the top of the wire drawing cabinet 1. The copper material 4 is S-shaped and passes through the partition 10 and the wire drawing cabinet 1, and comes into contact with the tensioning wheel 38. The copper material 4 is drawn by passing through the mold body 27 of different models and is finally collected at the wire take-up machine.

[0024] Example 3 like Figures 8-11 As shown, based on the above embodiments, in this embodiment, the wire drawing assembly also includes an angle adjustment motor 2 fixedly installed on the outside of the wire drawing cabinet 1. The hollow support rod 20 is rotatably connected to the wire drawing cabinet 1. One end of the multiple hollow support rods 20 extending to the outside of the wire drawing cabinet 1 is symmetrically and fixedly connected with an adjustment sprocket 214. An adjustment chain 213 is sleeved and connected between two adjacent adjustment sprockets 214. Two adjacent adjustment chains 213 are alternately arranged. The output end of the angle adjustment motor 2 is fixedly installed with the middle hollow support rod 20.

[0025] A connector 21 is rotatably connected to the outer side of the hollow support rod 20, and the connector 21 and the hollow support rod 20 are interconnected. The connector 21 is fixed to the inner side of the wire drawing cabinet 1. A liquid outlet 24 is connected to one end of the hollow support rod 20 near the clamping plate 22, and the liquid outlet 24 is connected to the nozzle 28.

[0026] The clamping disk 22 is rotatably connected to a spiral disk 25. The spiral disk 25 and the clamping disk 22 are slidably arranged in a circumferential array with multiple sliding plates 23. The ends of the multiple sliding plates 23 that are close to each other are fixedly connected to the clamping platform 210. The clamping platform 210 is rotatably connected to an adjusting screw 29. Two clamping plates 212 are respectively threaded to the positive and negative threads of the adjusting screw 29. The clamping platform 210 is symmetrically fixedly connected to a limiting slide rod 211. The limiting slide rod 211 slides relative to the clamping plate 212.

[0027] Furthermore, starting from the copper material 4 entering the drawing cabinet 1, the temperature in each chamber gradually decreases, and the temperature of the coolant sprayed by the nozzles 28 in each chamber gradually decreases. At the same time, the size of the mold body 27 corresponding to each chamber is different. During mold adjustment, the mold body 27 is placed in the middle of the clamping plate 22. Then, by rotating the handle on the spiral plate 25, which has spiral grooves, the sliding plate 23 slides in the spiral grooves. Using the limiting effect of the clamping plate 22, multiple sliding plates 23 are driven to move closer to each other, restricting the mold body 27 between multiple sliding plates 23 and between two clamping plates 212. By rotating the adjusting screw 29, the two clamping plates 212 are driven to move closer to each other, thus achieving stable clamping of the mold body 27. Furthermore, the mold body 27 is symmetrically arranged, and both sides can serve as the entry end of the copper material 4. When the wear of the wire drawing hole on one side is large, or the angle of the mold body 27 is adjusted to reduce the accumulation of copper powder, the angle adjustment motor 2 is started, and under the transmission action of the directional sprocket 214 and the directional chain 213, multiple hollow support rods 20 are driven to rotate, thereby achieving the desired angle. Furthermore, during the cooling process of the mold body 27, the nozzle 28 is always aligned with the center of the mold body 27. The connector 21 is connected to the external coolant equipment. The coolant enters the pipe inside the hollow support rod 20 through the connector 21. The hollow support rod 20 is provided with a channel. The coolant enters the nozzle 28 from the outlet 24 to cool the upper and lower surfaces of the mold body 27 simultaneously. Example 4 like Figures 2-7 As shown, based on the above embodiments, in this embodiment, the tension adjustment component further includes a translation slide rail 31. Two sets of translation slide rails 31 are symmetrically arranged in each chamber. Each set of two translation slide rails 31 is fixedly connected to the two inner side walls of the wire drawing cabinet 1, and the two sets of translation slide rails 31 are located at different heights. Translation screws 32 are arranged inside the multiple translation slide rails 31 located on the same side and at the same height. The translation screws 32 are rotatably connected to the wire drawing cabinet 1 and the partition 10. The ends of the two translation screws 32 located at the same height that extend to the outside of the wire drawing cabinet 1 are fixedly connected to translation sprockets 34. A translation chain 33 is sleeved between the two translation sprockets 34. Dust baffles 30 are arranged outside the two translation sprockets 34. The dust baffles 30 are fixedly connected to the wire drawing cabinet 1. An auxiliary motor 3 is installed on the dust baffle 30. The output end of the auxiliary motor 3 is connected to the translation screw 32. The two auxiliary motors 3 are located on both sides and at different heights.

[0028] Each translation slide rail 31 has a threaded block 36 slidably installed on its inner side. The threaded block 36 is threadedly connected to the translation screw 32. Two threaded blocks 36 located in the same chamber and at the same height are fixedly connected to the fixed rod 35. A reversing wheel 39 is fixedly connected to the middle of the fixed rod 35. Fixed plates 311 are fixedly connected to both sides of the reversing wheel 39. The fixed plates 311 and the fixed rod 35 are rotatably connected to the steering plate 37. The steering plate 37 and the fixed plate 311 are fixedly connected to a tension torsion spring 310.

[0029] Furthermore, when the tilt angle of the mold body 27 changes, the tilt angle of the copper material 4 changes accordingly. Therefore, by starting the auxiliary motor 3, through the transmission action of the translation sprocket 34 and the translation chain 33, the two translation screws 32 are driven to rotate simultaneously. The threaded block 36 moves under the restriction of the translation slide rail 31. The distance of movement is related to the tilt angle of the mold body 27, ensuring that the copper material 4 is perpendicular to the mold body 27.

[0030] Furthermore, the top auxiliary motor 3 and the bottom auxiliary motor 3 rotate in opposite directions, so that the two directional wheels 39 in the same chamber move in opposite directions, ensuring that the copper material 4 is in full contact with the directional wheels 39; Furthermore, the copper material 4 passes through two tensioning rollers 38 and contacts the deflector roller 39. The deflector roller 39 is equipped with a tension sensor that can detect the tension of the copper material 4. There is pressure between the copper material 4 and the tensioning rollers 38, which causes the steering plate 37 to rotate along the axis of the fixed rod 35. At the same time, the tension torsion spring 310 generates a corresponding elastic force. If vibration occurs during the drawing process of the copper material 4, the restoring force stored in the tension torsion spring 310 causes the steering plate 37 to rotate and tension the copper material 4, preventing the wire from breaking.

[0031] Example 5 like Figure 12 As shown, based on the above embodiments, in this embodiment, the broken wire clamping assembly further includes a dual-axis motor 52 fixedly installed on the partition 10. Both output ends of the dual-axis motor 52 are fixedly installed with drive gears 53. A clamping cylinder 5 is fixedly connected to the inner side of the partition 10. Two limiting discs 55 are respectively fixedly connected to the two ends of the clamping cylinder 5. A clamping gear ring 50 is fixedly connected to the outer side of the drive disc 54. The clamping gear ring 50 meshes with the drive gear 53.

[0032] The drive disk 54 has multiple arc-shaped grooves 540 through a circular array, and the limiting disk 55 has multiple straight grooves 550 through a circular array. The clamping slider 51 is limited and slidably disposed inside the arc-shaped grooves 540 and the straight grooves 550. The side of the multiple clamping sliders 51 that is close to each other is provided with serrations 56.

[0033] Furthermore, when the tension sensor on the deflector wheel 39 detects a sudden drop in tension, the system controls the dual-axis motor 52 to start. Using the two drive gears 53 fixedly connected to the output ends, the drive disk 54 is driven to rotate. The two ends of the arc-shaped slide 540 and the straight slide 550 are respectively located on two circular arcs, and these two circular arcs are concentric. The two ends of the arc-shaped slide 540 are 90 degrees out of phase. When the drive disk 54 rotates 90 degrees, the serrations 56 on the multiple clamping sliders 51 just come into contact with each other, thereby clamping the copper material 4 and preventing the tension from being released due to the broken wire of the copper material 4, which would cause the broken end of the copper material 4 to bounce out and get entangled on other equipment structures.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer shielded composite cable for high-speed railway bridge crossings, comprising an outer sheath (6), characterized in that, The outer sheath (6) is nested from the outside in with a second shielding layer (60), a shielding isolation layer (61), a first shielding layer (62), and an inner sheath (63). The inner sheath (63) is arranged in a circular array with a power core (66), an optical fiber core (661), and a signal core (660). The power core (66), optical fiber core (661), and signal core (660) are surrounded by a filling layer (64). The filling layer (64) contains multiple reinforcing members (65). The power core (66) is made of multiple copper wires hinged together and the copper wires are prepared by a wire drawing device.

2. A wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges, comprising a wire drawing cabinet (1) and copper material (4), characterized in that, The drawing cabinet (1) is equipped with multiple partitions (10) on its inner side. The partitions (10) divide the drawing cabinet (1) into several chambers. The temperature of the chambers is related to the drawing gradient. Each chamber is equipped with a wire drawing assembly, which includes a symmetrically rotatable hollow support rod (20). A clamping plate (22) is fixedly connected between two hollow support rods (20). Multiple clamping platforms (210) are slidably arranged in a circular array on the inner side of the clamping plate (22). Clamping plates (212) are symmetrically slidably arranged on the clamping platforms (210). A mold body (27) is clamped between two clamping plates (212). Spray nozzles (28) are symmetrically installed on both the top and bottom sides of the clamping plate (22). Each chamber is provided with two tension adjustment components. The tension adjustment components include a fixed rod (35) that is symmetrically slidably arranged, a steering plate (37) that is rotatably arranged on the fixed rod (35), a tensioning wheel (38) that is symmetrically rotatably connected on the steering plate (37), and a restoring force between the steering plate (37) and the fixed rod (35). The partition (10) is provided with a broken wire clamping assembly, which includes a symmetrically fixed limiting disk (55). A driving disk (54) is rotatably connected to the outside of the limiting disk (55). Multiple clamping sliders (51) are equidistantly arranged in a circumferential array between the limiting disk (55) and the driving disk (54). The clamping sliders (51) are used to clamp the copper material (4) when it breaks.

3. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 2, characterized in that, The wire drawing assembly also includes an angle adjustment motor (2) fixedly installed on the outside of the wire drawing cabinet (1). The hollow support rod (20) is rotatably connected to the wire drawing cabinet (1). One end of each of the multiple hollow support rods (20) extending to the outside of the wire drawing cabinet (1) is symmetrically fixedly connected to an adjustment sprocket (214). An adjustment chain (213) is sleeved between two adjacent adjustment sprockets (214). Two adjacent adjustment chains (213) are alternately arranged. The output end of the angle adjustment motor (2) is fixedly installed with the middle hollow support rod (20).

4. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 3, characterized in that... The hollow support rod (20) is rotatably connected to a connector (21), and the connector (21) and the hollow support rod (20) are interconnected. The connector (21) is fixed to the inside of the wire drawing cabinet (1). The hollow support rod (20) is connected to a liquid outlet (24) at one end near the clamping plate (22). The top and bottom of the clamping plate (22) are symmetrically fixed with mounting platforms (26). The nozzle (28) is mounted on the mounting platform (26), and the liquid outlet (24) is connected to the nozzle (28).

5. The wire drawing device for the multi-layer shielded composite cable used in high-speed railway bridges according to claim 4, characterized in that, The clamping disk (22) is rotatably connected to a spiral disk (25). The spiral disk (25) and the clamping disk (22) are slidably arranged in a circumferential array with multiple sliding plates (23). The ends of the multiple sliding plates (23) that are close to each other are fixedly connected to the clamping platform (210). The clamping platform (210) is rotatably connected to an adjusting screw (29). Two clamping plates (212) are respectively threaded to the positive and negative threads of the adjusting screw (29). The clamping platform (210) is symmetrically fixedly connected to a limiting slide rod (211). The limiting slide rod (211) slides relative to the clamping plate (212).

6. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 2, characterized in that, The tension adjustment assembly also includes translation slide rails (31). Two sets of translation slide rails (31) are symmetrically arranged in each chamber. Each set of two translation slide rails (31) is fixedly connected to the two inner side walls of the wire drawing cabinet (1), and the two sets of translation slide rails (31) are located at different heights. Translation screws (32) are provided inside the multiple translation slide rails (31) located on the same side and at the same height. The translation screws (32) are rotatably connected to the wire drawing cabinet (1) and the partition (10). One end of each of the two translation screws (32) extending to the outside of the wire drawing cabinet (1) is fixedly connected to a translation sprocket (34). A translation chain (33) is sleeved between the two translation sprockets (34). A dust baffle (30) is provided on the outside of the two translation sprockets (34). An auxiliary motor (3) is installed on the dust baffle (30). The output end of the auxiliary motor (3) is connected to the translation screw (32) for transmission. The two auxiliary motors (3) are located on both sides and at different heights.

7. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 6, characterized in that, Each of the translation slide rails (31) has a threaded block (36) slidably provided on its inner side. The threaded block (36) is threadedly connected to the translation screw (32). Two threaded blocks (36) located in the same chamber and at the same height are fixedly connected to the fixed rod (35). A reversing wheel (39) is fixedly connected to the middle of the fixed rod (35). Fixed plates (311) are fixedly connected to both sides of the reversing wheel (39). The fixed plates (311) and the fixed rod (35) are rotatably connected to the steering plate (37). The steering plate (37) and the fixed plate (311) are fixedly connected to a tension torsion spring (310).

8. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 2, characterized in that, The broken wire clamping assembly also includes a dual-axis motor (52) fixedly installed on the partition (10). Both output ends of the dual-axis motor (52) are fixedly installed with drive gears (53). A clamping cylinder (5) is fixedly connected to the inner side of the partition (10). Two limiting discs (55) are fixedly connected to the two ends of the clamping cylinder (5). A clamping gear ring (50) is fixedly connected to the outer side of the drive disc (54). The clamping gear ring (50) meshes with the drive gear (53).

9. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 8, characterized in that, The drive disk (54) has a plurality of arc-shaped grooves (540) through a circular array, and the limiting disk (55) has a plurality of straight grooves (550) through a circular array. The clamping slider (51) is slidably positioned inside the arc-shaped grooves (540) and the straight grooves (550). The sides of the plurality of clamping sliders (51) that are close to each other are provided with serrations (56).

10. The wire drawing device for multi-layer shielded composite cables used in high-speed railway bridges according to claim 2, characterized in that, The copper material (4) has an S-shaped wire. The copper material (4) passes through the partition (10) and the wire drawing cabinet (1) and is in contact with the tensioning wheel (38). The copper material (4) is drawn by passing through the mold body (27) of different models.

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