Flexible drag chain cable processing device

Abstract

The application discloses a flexible drag chain cable processing device, and belongs to the technical field of cable processing.The device comprises a stranding machine, a metal shielding layer braiding machine, a powder applying mechanism and a traction mechanism.The powder applying mechanism comprises a rack, a powder box and a rotary driving assembly.The powder box is horizontally arranged and is in a cylindrical shape.Two ends of the powder box are respectively provided with an inlet pipe and an outlet pipe, which are rotationally connected with the rack.The rotary driving assembly is used for driving the powder box to rotate around its own axis.The powder box is internally provided with an extrusion cavity, which is filled with talcum powder.The cross section of the inner wall of the extrusion cavity is circular, and the center of the cross section is eccentrically arranged with the powder box.The minimum extrusion gap is the gap between the outer wall of the cable and the inner wall of the extrusion cavity.The application can improve the powder density and permeability, reduce the friction and adhesion between the cores, meet the high mechanical flexibility requirement of the drag chain cable, and smooth the small burrs on the surface of the metal shielding layer.

Description

Technical Field

[0001] This application belongs to the field of cable processing technology and relates to a flexible drag chain cable processing device. Background Technology

[0002] Flexible drag chain cables are suitable for demanding dynamic scenarios involving millions of consecutive bends, and therefore have higher requirements for mechanical flexibility compared to conventional cables.

[0003] The existing cable processing equipment includes a stranding machine, a metal shielding braiding machine, a powdering mechanism, and a traction mechanism. The traction mechanism is used to drive the cable to move. The stranding machine is used to process the stranding of multi-strand wires. The metal shielding braiding machine is used to braid the metal shielding layer of the stranded cable. The cable with the metal shielding layer then passes through the powdering mechanism.

[0004] The powder coating mechanism is a powder box filled with talc powder. A traction force forces the cable through the powder box, causing a layer of talc powder to adhere to the cable surface. As the cable passes through the talc powder, a void is formed within the powder, carried out by the cable. Under gravity, part of this void collapses, allowing subsequent cables to still be coated with talc powder. The talc powder penetrating the metal shielding layer improves the cable's insulation, fire resistance, and strength, and also reduces friction and adhesion between the cores, meeting the high mechanical flexibility requirements of drag chain cables. The talc powder on the surface of the metal shielding layer effectively prevents the cable from sticking to the outer sheath.

[0005] However, the talcum powder applied by the existing powdering mechanism is relatively loose and easy to fall off, and its penetration is shallow, which limits its effect on reducing friction and stickiness between the wire cores. Summary of the Invention

[0006] To address the issues of existing talc powder being relatively loose, easily falling off, and having shallow penetration, a flexible drag chain cable processing device is provided.

[0007] This application provides a flexible drag chain cable processing device, which is implemented using the following technical solution: A flexible drag chain cable processing device includes a stranding machine, a metal shielding layer braiding machine, a powder application mechanism, and a traction mechanism. The powder application mechanism includes a frame, a powder box, and a rotation drive assembly. The powder box is horizontally positioned and cylindrical. An inlet pipe and an outlet pipe are respectively located at the two ends of the powder box's axis. The inlet pipe and outlet pipe are rotatably connected to the frame. The rotation drive assembly drives the powder box to rotate around its own axis. The powder box has an extrusion chamber filled with talc powder. The inner wall of the extrusion chamber has a circular cross-section, and the center of the extrusion chamber's inner wall cross-section is eccentrically positioned relative to the powder box. The shortest distance between the outer wall of the cable and the inner wall of the extrusion chamber is set as the minimum extrusion gap.

[0008] Through the above technical solution, during the rotation of the powder box driven by the rotation drive component, the extrusion chamber rotates eccentrically. Therefore, a dynamic and narrow extrusion area is created on the inner wall of the extrusion chamber. As the powder box rotates, the minimum extrusion gap will force a large amount of talc powder to be squeezed through the cable surface under extremely high pressure, and the talc powder will be squeezed into the metal shielding layer. Some of the talc powder will seep into the twisting gap of the wire harness through the braiding gap of the metal shielding layer, while some of the talc powder will be densely attached to the surface of the metal shielding layer, thereby improving the powder density and penetration, reducing the friction and adhesion between the wire cores, and meeting the high mechanical flexibility requirements of the drag chain cable.

[0009] Secondly, the high-speed flowing and extruded talc powder acts like a fluid polishing medium to smooth out tiny burrs, oxide layers, and unevenness on the surface of the metal shielding layer. This can significantly reduce the risk of tip discharge and improve the electrical safety and lifespan of the cable.

[0010] Optionally, the outer circumference of the powder box is evenly provided with a plurality of dynamic balance mounting holes; the frame is provided with two support components to support the cables at both ends of the powder box respectively. The support components include two first support wheels and two second support wheels. The two first support wheels are arranged symmetrically vertically, and the two second support wheels are arranged symmetrically horizontally. The concave wheel surfaces of the first support wheels and the second support wheels are used to cooperate with the cables.

[0011] Optionally, both the inlet pipe and the outlet pipe are fixed with spiral scraping protrusions, the spiral axis of which is the axis of the powder box; when the powder box rotates, the axial component of the force exerted by the spiral scraping protrusions of the inlet pipe on the talc powder forces the talc powder to move toward the outlet pipe, and the axial component of the force exerted by the spiral scraping protrusions of the outlet pipe on the talc powder forces the talc powder to move toward the inlet pipe.

[0012] Optionally, a retaining ring is coaxially fixed to the inner wall of both the outlet end of the inlet pipe and the inlet end of the outlet pipe. The surface of the retaining ring facing the middle of the powder box is stamped with multiple circumferentially evenly arranged oblique holes, and the outlet of the oblique holes is away from the rotation direction of the powder box.

[0013] Optionally, it also includes an axial reciprocating drive assembly for driving the powder box to move axially back and forth. The axial amplitude of the powder box is 5-10mm. Both the inlet pipe and the outlet pipe are fitted with sliding sleeves through double-row angular contact ball bearings. The sliding sleeves slide and cooperate with the frame along the axial direction of the powder box. The axial reciprocating drive assembly includes a telescopic cylinder and a spring. Both ends of the powder box are connected to abutment ring plates through angular contact ball bearings. The spring and the telescopic cylinder are respectively located at the two ends of the frame of the powder box. The spring abuts axially against the adjacent abutment ring plate, and the telescopic end of the telescopic cylinder abuts axially against the adjacent abutment ring plate.

[0014] Optionally, the extrusion chamber is divided axially from the inlet pipe to the outlet pipe into an inlet section, a first transition section, a middle section, a second transition section, and an outlet section. The minimum extrusion gap of the inlet section is greater than the minimum extrusion gap of the middle section and the outlet section, and the minimum extrusion gap of the middle section is less than the minimum extrusion gap of the outlet section. The inner diameter of the first transition section gradually decreases axially from the inlet pipe to the outlet pipe, and the inner diameter of the second transition section gradually increases axially from the inlet pipe to the outlet pipe.

[0015] Optionally, the extrusion chamber is spiral-shaped, and the center of each cross-section of the extrusion chamber extends spirally around the axis of the powder box. The number of spiral turns of the extrusion chamber is 1 turn. The axial component force applied to the talc powder by the inner wall of the extrusion chamber forces the talc powder to move toward the inlet pipe.

[0016] Optionally, the powder box includes a central tube and two boxes, each of which has the extrusion chamber. The two boxes are respectively provided with an inlet pipe and an outlet pipe at their opposite ends. The two ends of the central tube are coaxially rotatably engaged with the proximal ends of the two boxes. The extrusion chamber is spiral-shaped, and the center of each cross-section of the extrusion chamber extends spirally around the axis of the powder box. The number of spiral turns of the extrusion chamber is 0.5 turns. The rotation drive assembly drives the two boxes to reciprocate in opposite directions around their own axes, with a rotation range of 180°.

[0017] The beneficial effects of this application are: 1. By setting a rotating powder box and an eccentrically positioned extrusion chamber, as the powder box rotates, the minimum extrusion gap will force a large amount of talc powder to be squeezed through the cable surface under extremely high pressure. This allows the talc powder to penetrate into the twisting gaps of the wire harness through the braiding gaps of the metal shielding layer and densely adhere to the surface of the metal shielding layer. This improves the powder density and penetration, reduces friction and adhesion between wire cores, meets the high mechanical flexibility requirements of drag chain cables, and can smooth the fine burrs on the surface of the metal shielding layer to reduce the risk of tip discharge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the feeding mechanism in Example 1.

[0019] Figure 2 This is a cross-sectional view of the powder box in Example 1.

[0020] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle.

[0021] Figure 4 This is a cross-sectional view of the end cap of Embodiment 2.

[0022] Figure 5 This is a schematic diagram of the retaining ring plate in Example 2.

[0023] Figure 6 This is a schematic diagram of the axial reciprocating drive assembly of Embodiment 3.

[0024] Figure 7 This is a longitudinal cross-sectional view of the inner cylinder of Example 4.

[0025] Figure 8 This is a schematic diagram of the inner cylinder of Example 5.

[0026] Figure 9 This is a cross-sectional view of the inner cylinder of Example 5.

[0027] Figure 10 This is a schematic diagram of the powder box in Example 6.

[0028] Figure 11 This is a partial cross-sectional view of the powder box in Example 6.

[0029] Explanation of reference numerals in the attached drawings: 1. Powder box; 3. Support assembly; 10. Frame; 100. Cable; 101. First support arm; 102. First sleeve; 103. Sliding sleeve; 104. Second support arm; 105. Second sleeve; 11. Outer cylinder; 111. Dynamic balance mounting hole; 112. Rib plate; 12. Inner cylinder; 121. Inlet section; 122. First transition section; 123. Middle section; 124. Second transition section; 125. Outlet section; 13. Extrusion chamber; 15. Last Small extrusion gap; 16. End cap; 161. Feeding cap; 17. Outlet pipe; 171. Spiral scraper ridge; 172. Baffle plate; 173. Inclined hole; 18. Inlet pipe; 19. Box body; 191. Partition plate; 192. Rotating sleeve; 20. Central tube; 21. Motor; 22. Gear ring; 23. First gear; 24. Rack; 25. Second gear; 31. First support wheel; 32. Second support wheel; 41. Telescopic cylinder; 42. Spring; 43. Abutment ring plate. Detailed Implementation

[0030] The embodiments of this application are described in detail below, and examples of the embodiments are provided in the appendix. Figures 1-11 As shown in the image.

[0031] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Example 1 Example 1 discloses a flexible drag chain cable processing apparatus. The apparatus, in the processing sequence, includes a stranding machine, a metal shielding layer braiding machine, a powder coating mechanism, and a traction mechanism. The stranding machine, metal shielding layer braiding machine, and traction mechanism are existing equipment and are not directly connected to the powder coating mechanism, so they will not be described in detail here. The traction mechanism is used to move the cable 100. The stranding machine is used to process the stranding of multi-strand wires. The metal shielding layer braiding machine is used to braid the metal shielding layer onto the stranded cable 100. The cable 100 with the metal shielding layer then passes horizontally through the powder coating mechanism.

[0033] like Figure 1 and Figure 2 As shown ( Figure 2 (The arrow indicates the direction of rotation of the powder box 1 relative to the cable 100). The powder feeding mechanism includes a frame 10, a powder box 1, and a rotation drive assembly. The powder box 1 is horizontally positioned. In this embodiment, the powder box 1 includes a cylindrical outer cylinder 11, a cylindrical inner cylinder 12, and two end caps 16. The inner cylinder 12 is located inside the outer cylinder 11 and is fixed to the outer cylinder 11 by ribs 112. The horizontally passing cable 100 is coaxial with the outer cylinder 11. The inner cylinder 12 is eccentrically positioned with respect to the outer cylinder 11. In this embodiment, the axis of the inner cylinder 12 is parallel to the outer cylinder 11. The inner cavity of the inner cylinder 12 is designated as the extrusion chamber 13, with a circular cross-sectional shape. The extrusion chamber 13 is filled with talc powder, the particle size of which is 10-45μm. The minimum extrusion gap 15 is defined as the shortest distance between the outer wall of the cable 100 and the inner wall of the extrusion chamber 13. The minimum extrusion gap 15 can be 0.8-2.0mm. The distance between the axis of the outer cylinder 11 and the axis of the extrusion chamber 13 can be 40-100mm. The axial length of the extrusion chamber 13 can be greater than 1000mm.

[0034] Two end caps 16 are fixed to both ends of the outer cylinder 11 by bolts (bolts not shown in the figure) to simultaneously close the ports of the outer cylinder 11 and the inner cylinder 12. In addition, one of the end caps 16 is also provided with a feeding port and a feeding cover 161 to facilitate the addition of talc powder into the extrusion chamber 13.

[0035] like Figure 1 , Figure 3As shown, the two end caps 16 are coaxially fixed with an inlet pipe 18 and an outlet pipe 17, respectively. Both the inlet pipe 18 and the outlet pipe 17 are coaxially arranged with the outer cylinder 11, and they communicate only with the extrusion chamber 13. The inlet pipe 18 and the outlet pipe 17 are rotatably connected to the frame 10. Specifically, the frame 10 has two first support arms 101 located at both ends of the outer cylinder 11. Each first support arm 101 has a horizontally arranged first sleeve 102 fixed to it. The inlet pipe 18 and the outlet pipe 17 are rotatably engaged with their respective first sleeves 102 via double-row angular contact ball bearings. In other embodiments, to improve the support effect, an auxiliary support structure can be provided on the frame 10 to provide auxiliary support for the middle part of the outer cylinder 11.

[0036] like Figure 1 As shown, the rotation drive assembly is used to drive the powder box 1 to rotate around its own axis. In this embodiment, the rotation drive assembly includes a gear ring 22, a first gear 23 and a motor 21. The motor 21 is mounted on the frame 10, the first gear 23 is fixed to the output shaft of the motor 21, and the gear ring 22 is sleeved and fixed on the circumference of the outer cylinder 11. The first gear 23 meshes with the gear ring 22, thereby driving the outer cylinder 11 and the inner cylinder 12 to rotate synchronously.

[0037] To reduce the rotational vibration of powder box 1 caused by eccentric arrangement, the following settings are also made, such as... Figure 1 As shown, multiple dynamic balancing mounting holes 111 are evenly distributed on the outer circumference of the powder box 1. During the rotation test vibration, the operator can select a specific dynamic balancing mounting hole 111 by observing the rotation of the powder box 1, and fix the dynamic balancing block (not shown in the figure) to the dynamic balancing mounting hole 111 with bolts. By continuously adjusting the position and number of the fixed dynamic balancing block, dynamic balancing can be achieved.

[0038] like Figure 1 , Figure 3 As shown, the frame 10 is provided with two support components 3. The two support components 3 are used to support the cables 100 at both ends of the powder box 1 to ensure the coaxiality of the cables 100 and the outer cylinder 11. Specifically, the support components 3 include two first support wheels 31 and two second support wheels 32. The first support wheels 31 and the second support wheels 32 are both installed on the adjacent first support arm 101. The two first support wheels 31 are arranged symmetrically vertically, and the two second support wheels 32 are arranged symmetrically horizontally. The concave wheel surfaces of the first support wheels 31 and the second support wheels 32 are used to cooperate with the cables 100.

[0039] The implementation principle of Example 1 is as follows: During the rotation of the powder box 1 driven by the rotation drive component, the extrusion chamber 13 rotates eccentrically, creating a dynamic narrow extrusion area on the inner wall of the extrusion chamber 13. As the powder box 1 rotates, the minimum extrusion gap 15 will force a large amount of talc powder to be squeezed through the surface of the cable 100 under extremely high pressure, and the talc powder will be squeezed into the metal shielding layer. Some of the talc powder will seep into the twisting gap of the wire harness through the braiding gap of the metal shielding layer, while some of the talc powder will be densely attached to the surface of the metal shielding layer, thereby improving the powder density and penetration. The increased penetration can greatly reduce the friction and adhesion between the wire cores, meeting the high mechanical flexibility requirements of the drag chain cable. The increased powder density can reduce the detachment of talc powder, thus ensuring the protective effect of the talc powder.

[0040] It is worth mentioning that by setting the eccentrically rotating extrusion chamber 13, the talc powder can flow and be extruded relative to the cable 100. That is, the high-speed flowing and extruded talc powder is similar to a fluid polishing medium to rub against the tiny burrs and oxide layer on the surface of the metal shielding layer. This can significantly reduce the risk of tip discharge and improve the electrical safety and life of the cable 100, thus combining multiple effects such as penetration, powdering, and smoothing.

[0041] Example 2 The difference between Example 2 and Example 1 is that, as Figure 4 , Figure 5 As shown ( Figure 5 (The direction of the middle arrow is the rotation direction of the powder box 1). The inner walls of the inlet pipe 18 and the outlet pipe 17 are both fixed with spiral powder scraping protrusions 171. The spiral axis of the spiral powder scraping protrusions 171 is the axis of the outer cylinder 11. The spiral powder scraping protrusions 171 can be made of rubber. There is a very small gap between the inner diameter of the spiral powder scraping protrusions 171 and the outer wall of the cable 100. This gap is the thickness of the powder layer.

[0042] Furthermore, the inner walls of the outlet end of the inlet pipe 18 and the inlet end of the outlet pipe 17 are coaxially fixed with baffle plates 172. The surface of the baffle plates 172 facing the middle of the powder box 1 is stamped with multiple circumferentially evenly arranged oblique holes 173. The outlet of the oblique holes 173 is away from the rotation direction of the powder box 1.

[0043] Excess talcum powder may be located inside the inlet pipe 18. Therefore, when the powder box 1 rotates, the axial force exerted on the talcum powder by the spiral scraping protrusion 171 of the inlet pipe 18 forces the talcum powder to move towards the outlet pipe 17, thus pushing the excess talcum powder into the extrusion chamber 13. The retaining ring 172 of the inlet pipe 18 is provided through the oblique hole 173, mainly serving to allow outflow but not inflow, that is, ensuring that the talcum powder in the inlet pipe 18 can more easily enter the inner cylinder 12, while the talcum powder in the inner cylinder 12 is less likely to enter the inlet pipe 18.

[0044] As the cable 100 moves, it may carry excess talcum powder out of the inner cylinder 12. Therefore, when the powder box 1 rotates, the axial force exerted on the talcum powder by the spiral scraping protrusion 171 of the outlet pipe 17 forces the talcum powder to move towards the inlet pipe 18. This pushes excess talcum powder back into the inner cylinder 12 and also adjusts the thickness of the powder layer, making it uniform. The retaining ring 172 of the outlet pipe 17 is set through the oblique hole 173, mainly to allow outflow but not inflow, that is, to ensure that the talcum powder in the outlet pipe 17 can more easily return to the inner cylinder 12, while the talcum powder in the inner cylinder 12 is less likely to enter the outlet pipe 17.

[0045] Example 3 The difference between Example 3 and Example 1 is that, as Figure 6 As shown, both the inlet pipe 18 and the outlet pipe 17 are fitted with sliding sleeves 103 via double-row angular contact ball bearings. The sliding sleeves 103 and the first body 102 of the frame 10 slide and cooperate along the axial direction of the powder box 1.

[0046] The powder feeding mechanism also includes an axial reciprocating drive assembly for driving the powder box 1 to move axially back and forth. The axial amplitude of the powder box 1 is 5-10mm. The axial reciprocating drive assembly includes a telescopic cylinder 41 and a spring 42. Both end caps 16 are connected to abutment ring plates 43 through angular contact ball bearings. The abutment ring plates 43 are coaxial with the outer cylinder 11 and can rotate relative to the outer cylinder 11. The spring 42 and the telescopic cylinder 41 are respectively mounted on the two first arms 101 of the frame 10. The spring 42 abuts axially against the adjacent abutment ring plates 43, and the telescopic end of the telescopic cylinder 41 abuts axially against the adjacent abutment ring plates 43. The telescopic cylinder 41 and the spring 42 cooperate with each other to drive the powder box 1 to vibrate axially back and forth by reciprocatingly pushing the abutment ring plates 43.

[0047] The implementation principle of Example 3 is as follows: while the powder box 1 is rotating, the axial reciprocating drive component makes the powder box 1 perform small-amplitude high-frequency reciprocating motion along the axial direction. The axial vibration causes the talc powder to undergo transverse shearing within the minimum extrusion gap 15, which disrupts the stable state of the talc powder and prevents local accumulation of talc powder.

[0048] Furthermore, axial vibration causes the contact angle and pressure between the cable 100 surface and the talc powder to change periodically, resulting in more uniform compression. Moreover, for the burrs on the metal shielding layer, axial vibration increases the randomness and frequency of talc powder impact, accelerating fatigue fracture.

[0049] Furthermore, the periodic changes in the contact angle and pressure of talcum powder make it easier for talcum powder to enter the twisted gaps within the cable 100 through different directions, angles, and positions, reducing the occurrence of talcum powder arching or blockage in the braided gaps.

[0050] Example 4 The difference between Example 4 and Example 1 or Example 3 is that, as Figure 7 As shown, the inner cylinder 12 has a variable diameter structure. Specifically, the extrusion chamber 13 is divided axially from the inlet pipe 18 to the outlet pipe 17 into an inlet section 121, a first transition section 122, a middle section 123, a second transition section 124, and an outlet section 125. The minimum extrusion gap 15 of the inlet section 121 is greater than the minimum extrusion gap 15 of the middle section 123 and the outlet section 125, and the minimum extrusion gap 15 of the middle section 123 is less than the minimum extrusion gap 15 of the outlet section 125.

[0051] The inner diameter of the first transition section 122 gradually decreases axially from the inlet pipe 18 to the outlet pipe 17, and the inner diameter of the second transition section 124 gradually increases axially from the inlet pipe 18 to the outlet pipe 17.

[0052] In this way, the large gap in the inlet section 121 allows a large amount of talcum powder to easily adhere to the surface of the cable 100, forming a talcum powder reserve. The extremely small gap in the middle section 123 generates high-pressure extrusion, forcing the talcum powder deep into the twisted seams of the cable 100, while simultaneously causing strong impact and fatigue peeling of the burrs on the metal shielding layer. The slightly larger gap in the outlet section 125 releases the extrusion pressure, allowing excess talcum powder to fall off naturally. In other words, the inlet section 121 provides pre-coverage, the middle section 123 presses in deeply, and the outlet section 125 is then trimmed.

[0053] Example 5 The difference between Example 5 and Example 1 is that, as Figure 8 , Figure 9 As shown, the inner cylinder 12 is spiral-shaped, meaning the extrusion chamber 13 is also spiral-shaped. The centers of each cross-section of the extrusion chamber 13 extend spirally around the axis of the housing 19, with the extrusion chamber 13 having one spiral turn. In simpler terms, imagine the inner cylinder 12 is axially divided into multiple cross-sectional rings, each ring eccentric to the housing 19, and each ring spirally extending around the axis of the housing 19. Each ring has a minimum extrusion gap 15 with the cable 100, and the relative positions of these minimum extrusion gaps 15 are different. This means that the direction of the extrusion force exerted by the talcum powder on the cable 100 by each ring is different and more uniform.

[0054] Therefore, the trajectory of talc particles on the surface of cable 100 is no longer a simple circular arc, but an oblique spiral. The grinding direction is diversified, and the burrs are subjected to impacts from different angles, resulting in higher fatigue fracture efficiency. The spiral motion causes the friction marks of talc on the metal shielding layer to be distributed in a spiral shape, which disperses stress and reduces the occurrence of annular groove wear.

[0055] Furthermore, when talc powder moves along an axial component, its movement path becomes more diverse, making it easier for the talc powder to enter the braided gaps of the metal shielding layer and the twisted gaps of the wire harness, resulting in a more thorough filling.

[0056] Another important point is that when the extrusion chamber 13 rotates, the spiral edges of the inner wall of the extrusion chamber 13 exert a circumferential shearing and crushing effect on the compacted talc powder, breaking up the agglomerates and reducing the slight clumping of talc powder due to moisture.

[0057] Furthermore, when the powder box 1 rotates, the axial force exerted on the talc powder by the inner wall of the extrusion chamber 13 forces the talc powder to move toward the inlet pipe 18. That is, a smaller axial force is applied to force the talc powder to move toward the inlet pipe 18, so as to reduce the occurrence of the cable 100 carrying excess talc powder out of the inner cylinder 12.

[0058] If the spiral inner cylinder 12 of this embodiment is combined with the technical solution of embodiment 3, that is, the spiral inner cylinder 12 rotates while simultaneously superimposed with small-amplitude high-frequency axial reciprocating motion, the following effects will be further produced: the reciprocating vibration combined with the spiral edges of the inner wall of the extrusion chamber 13 produces a circumferential shearing and crushing effect on the talc powder, which significantly reduces the overall apparent viscosity of the talc powder. The talc powder changes from a compacted mass to a fluidized bed-like state. The fluidized talc powder can penetrate into the smallest stranded gaps of the cable 100 like a liquid, making the isolation between the internal core wires more thorough when the drag chain cable is bent, and significantly extending its lifespan. Furthermore, the spiral oblique motion combined with the rapid axial reciprocating sliding creates microscopic cross scratches on the surface of the metal shielding layer, making it easier for talc powder particles to embed into these microstructures.

[0059] Example 6 The difference between Example 6 and Example 1 is that, as Figure 10 , Figure 11 As shown, the powder box 1 includes a central tube 20 and two boxes 19. Each of the two boxes 19 includes an outer cylinder 11 and an inner cylinder 12. End caps 16 are fixed to the opposite ends of the two outer cylinders 11. Partitions 191 are fixed to the near ends of the two outer cylinders 11. The partitions 191 seal the ports of the outer cylinders 11 and the inner cylinders 12. The extrusion chamber 13 is spiral-shaped, and the center of each cross section of the extrusion chamber 13 extends spirally around the axis of the box 19. The number of spiral turns of the extrusion chamber 13 is 0.5 turns.

[0060] The two partitions 191 are also coaxially fixed with rotating sleeves 192. The two ends of the central tube 20 are respectively inserted into the two rotating sleeves 192, that is, the two boxes 19 can rotate independently relative to the central tube 20. The central tube 20 is only connected to the extrusion chambers 13 of the two inner cylinders 12.

[0061] To improve the support effect, the frame 10 is fixed with two second arms 104. The upper end of the second arm 104 is fixed with a second sleeve 105, and the rotating sleeve 192 is rotatably inserted into the second sleeve 105.

[0062] The rotation drive assembly drives the two housings 19 to rotate back and forth in opposite directions around their own axes, with a rotation range of 180°. That is, when the left housing 19 rotates 0.5 turns in the forward direction, the right housing 19 rotates 0.5 turns in the reverse direction. Then, when the left housing 19 rotates 0.5 turns in the reverse direction, the right housing 19 rotates 0.5 turns in the forward direction, and so on.

[0063] Specifically, the rotation drive assembly includes two racks 24, two second gears 25, and two hydraulic cylinders (not shown in the figure). The two second gears 25 are coaxially fixed on two rotating sleeves 192, the racks 24 are horizontally arranged, and the racks 24 mesh with the second gears 25. The hydraulic cylinders are externally fixed and drive the racks 24 to move linearly back and forth along their own length direction. The two racks 24 move in opposite directions and synchronously.

[0064] The implementation principle of Example 6 is as follows: by combining eccentric extrusion, spiral extrusion cavity 13, and double box 19 swinging back and forth, firstly, the double box 19 swinging back and forth causes the impact direction of talc powder on the burrs to have periodic reversal. Each reversal causes the burrs of the metal shielding layer to bear alternating bending stress at their root. The repeated bending greatly increases the fatigue fracture efficiency of the burrs.

[0065] Secondly, the reciprocating swing of the two housings 19 in opposite directions ensures that the circumferential frictional torques applied to the cable 100 by the talcum powder are equal in magnitude and opposite in direction, thus canceling each other out. At the same time, since the spiral extrusion chamber 13 in each inner cylinder 12 only turns half a circle, the axial thrust it generates on the cable 100 is also balanced between the two housings 19, thereby greatly ensuring the stability of the cable 100 under stress.

[0066] Most importantly, if the powder box 1 rotates continuously in one direction, the extrusion zone (the area near the minimum extrusion gap 15) will be fixed on one side of the eccentric direction of the cable 100, while the other side will always be in the low-pressure zone, resulting in uneven distribution of talcum powder. However, in this embodiment, when the reciprocating oscillation is superimposed with the spiral extrusion chamber 13, the extrusion zone will sweep back and forth across the entire circumference of the cable 100 with each forward and reverse rotation of the box 19. Since it only rotates 0.5 times (180°) each time, plus the 0.5 rotation of the spiral of the extrusion chamber 13, the extrusion zone actually covers the 180° arc surface of the cable 100 in half an oscillation cycle. In the next half oscillation cycle, the extrusion zone covers the other 180° arc surface. That is, every angle of the surface of the cable 100 will periodically become an extrusion zone, and the talcum powder is evenly pressed into all gaps.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A flexible drag chain cable processing device, characterized in that, The system includes a stranding machine, a metal shielding layer braiding machine, a powder application mechanism, and a traction mechanism. The powder application mechanism includes a frame (10), a powder box (1), and a rotation drive assembly. The powder box (1) is horizontally positioned and is cylindrical. An inlet pipe (18) and an outlet pipe (17) are respectively provided at the two ends of the shaft of the powder box (1). The inlet pipe (18) and the outlet pipe (17) are rotatably connected to the frame (10). The rotation drive assembly is used to drive the powder box (1) to rotate around its own axis. The powder box (1) has a compression chamber (13) inside. The compression chamber (13) is filled with talcum powder. The cross-sectional shape of the inner wall of the compression chamber (13) is circular, and the center of the cross-section of the inner wall of the compression chamber (13) is eccentrically set with respect to the powder box (1). The gap between the shortest distance between the outer wall of the cable (100) and the inner wall of the compression chamber (13) is set as the minimum compression gap (15).

2. The flexible drag chain cable processing device according to claim 1, characterized in that, The powder box (1) has a plurality of dynamic balance mounting holes (111) evenly distributed on its outer circumference. The frame (10) is provided with two support components (3) to support the cables (100) at both ends of the powder box (1). The support components (3) include two first support wheels (31) and two second support wheels (32). The two first support wheels (31) are arranged symmetrically up and down, and the two second support wheels (32) are arranged symmetrically in the horizontal direction. The concave wheel surfaces of the first support wheels (31) and the second support wheels (32) are used to cooperate with the cables (100).

3. The flexible drag chain cable processing device according to claim 1, characterized in that, The inner walls of both the inlet pipe (18) and the outlet pipe (17) are fixed with spiral scraping protrusions (171), and the spiral axis of the spiral scraping protrusions (171) is the axis of the powder box (1). When the powder box (1) rotates, the axial component of the force exerted by the spiral scraping protrusions (171) of the inlet pipe (18) on the talc powder forces the talc powder to move toward the outlet pipe (17), and the axial component of the force exerted by the spiral scraping protrusions (171) of the outlet pipe (17) on the talc powder forces the talc powder to move toward the inlet pipe (18).

4. The flexible drag chain cable processing device according to claim 3, characterized in that, The inner walls of the outlet end of the inlet pipe (18) and the inlet end of the outlet pipe (17) are coaxially fixed with a retaining ring plate (172). The surface of the retaining ring plate (172) facing the middle of the powder box (1) is stamped with a plurality of circumferentially evenly arranged oblique holes (173). The outlet of the oblique holes (173) is away from the rotation direction of the powder box (1).

5. The flexible drag chain cable processing device according to claim 1, characterized in that, It also includes an axial reciprocating drive assembly for driving the powder box (1) to move axially back and forth. The axial amplitude of the powder box (1) is 5-10mm. The inlet pipe (18) and the outlet pipe (17) are both fitted with sliding sleeves (103) through double-row angular contact ball bearings. The sliding sleeves (103) and the frame (10) slide and cooperate with each other along the axial direction of the powder box (1). The axial reciprocating drive assembly includes a telescopic cylinder (41) and a spring (42). Both ends of the powder box (1) are connected to abutment ring plates (43) through angular contact ball bearings. The spring (42) and the telescopic cylinder (41) are respectively located at the two ends of the frame (10) in the powder box (1). The spring (42) abuts axially against the adjacent abutment ring plate (43). The telescopic end of the telescopic cylinder (41) abuts axially against the adjacent abutment ring plate (43).

6. The flexible drag chain cable processing apparatus according to claim 1 or 5, characterized in that, The extrusion chamber (13) is divided into an inlet section (121), a first transition section (122), a middle section (123), a second transition section (124), and an outlet section (125) along the axial direction from the inlet pipe (18) to the outlet pipe (17). The minimum extrusion gap (15) of the inlet section (121) is greater than the minimum extrusion gap (15) of the middle section (123) and the outlet section (125). The minimum extrusion gap (15) of the middle section (123) is smaller than the minimum extrusion gap (15) of the outlet section (125). The inner diameter of the first transition section (122) gradually decreases along the axial direction from the inlet pipe (18) to the outlet pipe (17), and the inner diameter of the second transition section (124) gradually increases along the axial direction from the inlet pipe (18) to the outlet pipe (17).

7. The flexible drag chain cable processing device according to claim 1 or 5, characterized in that, The extrusion chamber (13) is spiral-shaped, and the center of each cross section of the extrusion chamber (13) extends spirally around the axis of the powder box (1). The number of spiral turns of the extrusion chamber (13) is 1 turn. The axial component force applied to the talc powder by the inner wall of the extrusion chamber (13) forces the talc powder to move toward the inlet pipe (18).

8. The flexible drag chain cable processing device according to claim 1, characterized in that, The powder box (1) includes a central tube (20) and two boxes (19). Both boxes (19) have the extrusion chamber (13). The two boxes (19) are respectively provided with the inlet pipe (18) and the outlet pipe (17) at their opposite ends. The two ends of the central tube (20) are coaxially rotated with the near ends of the two boxes (19). The extrusion chamber (13) is spiral, and the center of each cross section of the extrusion chamber (13) extends spirally around the axis of the box (19). The number of spiral turns of the extrusion chamber (13) is 0.5 turns. The rotation drive assembly drives the two boxes (19) to reciprocate around their own axes in opposite directions with a rotation amplitude of 180°.

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