Special cable for high-torque robot and preparation method

Abstract

The invention discloses a special cable for a high-torque robot and a preparation method, and the cable comprises a cable core, the cable core is sleeved with an inorganic mineral layer, the inorganic mineral layer is sleeved with a metal net, the metal net is sleeved with a flame-retardant foaming layer, and the flame-retardant foaming layer is internally provided with a plurality of cavities with built-in flame-retardant gas. Heat dissipation holes penetrating through the inner side face and the outer side face of the flame-retardant foaming layer are formed between the adjacent cavities; the exterior of the flame-retardant foaming layer is sleeved with a heat-insulating fire-resistant layer, the exterior of the heat-insulating fire-resistant layer is sleeved with an outer sheath, a plurality of flexible lining strips are uniformly distributed between the heat-insulating fire-resistant layer and the outer sheath in the circumferential direction, and the flexible lining strips are filled with a flame retardant; according to the invention, when the cable is not burnt, the pressure and torsion applied to the cable can be buffered and weakened, and the compression resistance and torsion resistance of the cable are improved; and when the cable is burnt, flame-retardant substances can be released to prevent or delay burning, so that normal and safe operation of the high-torque robot is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of special cables for robots, and in particular relates to a special cable for high-torque robots and a preparation method thereof. Background Art

[0002] Cables can be used to transmit power or communicate, especially in the application field of high-torque robots, where the power supply and communication control of high-torque robots are completely realized by special cables. In order to improve the safety of the working process of high-torque robots, robot-specific cables are required to have excellent heat insulation and fireproof capabilities. At the same time, in order to adapt to the high torque and complex working environment requirements of high-torque robots, it is also necessary to further ensure that the cables used in high-torque robots have excellent compression and torsion resistance, so as to adapt to the complex working environment of high-torque robots.

[0003] In order to meet the requirements of compression and torsion resistance, existing robot cables usually have compression and torsion resistance layers made of flexible compression and torsion resistance materials inside the cables to ensure that the cables have compression and torsion resistance. However, the compression and torsion resistance layers inside the existing cables cannot achieve the effect of flame retardancy and heat insulation, which makes it difficult for existing robot cables to ensure safe operation in the face of high temperature, fire and other situations.

[0004] In order to meet the requirements of heat insulation and fire prevention, the existing technology is to set an insulating protective layer on the outside of the cable core and set a fireproof layer or fire-resistant material between the cable cores to achieve the fireproof performance of the cable. However, the fireproof materials inside the existing fireproof cables mostly use organic flame retardants and modified polymers to ensure that the cables have a certain fireproof ability, but the cost of using organic flame retardants and modified polymers is relatively high, and the existing robot cables have relatively weak torsion resistance in addition to having fireproof performance.

[0005] In summary, the existing high-torque robot cables cannot well integrate the performance requirements of compression resistance, torsion resistance, heat insulation and fire resistance. Therefore, in view of the above technical problems existing in the existing robot cables, the present invention discloses a high-torque robot special cable and a preparation method. Summary of the invention

[0006] The present invention discloses a special cable for high-torque robots and a preparation method, which take into account the pressure resistance and heat insulation and fire protection requirements of the high-torque robot when it is working. It can buffer and weaken the pressure and torque exerted on the cable itself when the cable is not burning, thereby improving the compression and torsional resistance of the cable itself; when the cable burns, it can release flame retardant substances to prevent or delay combustion, thereby ensuring the normal and safe operation of the high-torque robot.

[0007] The present invention is achieved through the following technical solutions: A special cable for high-torque robots, comprising a cable core, the outer sheath of the cable core is provided with an inorganic mineral layer, the outer sheath of the inorganic mineral layer is provided with a metal mesh, the outer sheath of the metal mesh is provided with a flame-retardant foam layer, the interior of the flame-retardant foam layer is provided with a plurality of cavities with built-in flame-retardant gas, and heat dissipation holes penetrating the inner and outer sides of the flame-retardant foam layer are provided between adjacent cavities; the outer sheath of the flame-retardant foam layer is provided with a heat-insulating and fire-resistant layer, the outer sheath of the heat-insulating and fire-resistant layer is provided with an outer sheath, a plurality of flexible lining strips are uniformly arranged along the circumferential direction between the heat-insulating and fire-resistant layer and the outer sheath, and the interior of the flexible lining strips is filled with a flame retardant.

[0008] The heat-insulating fire-resistant layer and the flame-retardant foaming layer group jointly realize the heat-insulating and flame-retardant functions. When the outside of the cable burns, the flexible lining strip is burned and damaged, and the flame retardant inside it is released to realize the first layer of flame retardancy to isolate or delay the spread of the fire. The heat-insulating fire-resistant layer plays the role of heat insulation and combustion delay. When the flame-retardant foam layer is burned and damaged, the flame-retardant gas contained in the dense cavity inside it is released, further preventing or delaying combustion, thereby effectively improving the heat-insulating and fire-resistant performance of the robot-specific cable. At the same time, an inorganic mineral layer is provided on the outside of the cable core, and the inorganic mineral layer itself also has excellent insulation, acid and alkali resistance, and toughness, thereby improving the heat-insulating and fire-resistant protection capabilities of the cable core. In addition, when the robot-specific cable is compressed or twisted, several flexible lining strips arranged between the outer sheath and the heat-insulating fire-resistant layer will undergo elastic deformation to buffer and weaken the pressure and torsion force on the cable, thereby improving the compression and torsion resistance of the robot-specific cable.

[0009] It should be noted that the thickness of the flame retardant foam layer and the heat-insulating fire-resistant layer is set according to actual usage requirements to ensure that the cable itself has a certain flexibility.

[0010] In order to better realize the present invention, further, the flame retardant foam layer includes an inner sleeve and a foam layer. The inner sleeve is arranged on the outside of the metal mesh, and a plurality of arc-shaped protrusions are evenly distributed on the outer surface of the inner sleeve along the circumferential direction. A plurality of guide pillars are linearly arranged along the axial direction of the cable core at the middle position of the arc-shaped protrusions, and heat dissipation holes are arranged inside the guide pillars. The outer surface of the inner sleeve is provided with a foam layer.

[0011] In order to better realize the present invention, further, the mass ratio components of the foaming layer are as follows: Polystyrene: 40-80%; PVC resin: 7.5%-15%; magnesium oxide or aluminum oxide: 2.5%-5%; halogen-free flame retardant: 1-25%; smoke suppressant: 1-3%; antioxidant: 0.1-2%; lubricant: 0.1-2%; foaming agent: 0.1-15%; other additives: 1.3-5.5%.

[0012] In order to better realize the present invention, further, a plurality of spiral grooves are evenly distributed along the circumferential direction on the inner side surface of the outer sheath, and the flexible lining strips are arranged along the spiral grooves.

[0013] In order to better implement the present invention, further, gaps are formed between adjacent flexible lining strips, and PVC particles are arranged inside the gaps.

[0014] In order to better implement the present invention, further, the metal mesh is woven by copper wires with a diameter of 0.3-0.4 mm, and the weaving density of the metal mesh is greater than or equal to 85%.

[0015] In order to better realize the present invention, further, the inorganic mineral layer includes an inner mica tape layer and an inorganic mineral filling layer. The inner mica tape layer is wound around the outside of the cable core, and the inorganic mineral filling layer is filled between the outer side of the inner mica tape layer and the metal mesh.

[0016] In order to better implement the present invention, further, the average particle size of the inorganic mineral filling layer is 4 μm.

[0017] A method for preparing a high-torque robot-specific cable comprises the following steps: Step 1, twisting to form a cable core, and winding an inner mica tape in a forward and reverse double helix direction on the outside of the cable core, and sheathing a metal mesh, wrapping an outer mica tape on the outside of the metal mesh, and filling an inorganic mineral material between the inner mica tape and the metal mesh to form an insulating inorganic mineral layer; Step 2, extruding the flame retardant foam material by a hot extrusion process, and filling the molten flame retardant foam material with a flame retardant gas during the process of extruding the flame retardant foam layer, so as to form a cavity with a built-in flame retardant gas inside the formed flame retardant foam layer; Step 3, a plurality of heat dissipation holes are formed on the flame retardant foam layer, and then the flame retardant foam layer is sleeved on the outside of the metal mesh, and then a heat insulating refractory cloth is wrapped around the outside of the flame retardant foam layer by a wrapping process to form a heat insulating refractory layer; Step 4: spirally arrange flexible lining strips on the outer circumference of the heat-insulating fire-resistant layer, and fill PVC particles in the gaps between adjacent flexible lining strips; Step 5: Form an outer sheath on the outside of the flexible lining strip, and spray a wear-resistant coating on the outer surface of the outer sheath to form a wear-resistant layer.

[0018] In order to better realize the present invention, further, in the step 1, a cable tie is used to tie up one end of the metal mesh, and then the area between the metal mesh and the inner mica tape is filled with inorganic mineral material. Every 5m of filling length, the inorganic mineral material is vibrated to make the inorganic mineral material densely filled.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention arranges an inorganic mineral layer, a flame retardant foaming layer, and a heat-insulating and fire-resistant layer on the outside of the cable core, thereby forming a dense heat-insulating and fire-proof structure on the outside of the cable core. When the cable is in a combustion environment, it effectively isolates heat, prevents or slows down the combustion speed, and thus ensures the safe and stable operation of the high-torque robot; at the same time, in the absence of combustion, the elastic deformation of the flexible lining strip buffers and weakens the pressure and torque on the cable, and ensures that the cable itself has a certain flexibility, thereby improving the compression and torsion resistance of the cable itself, and can take into account the compression and torsion resistance requirements and heat-insulating and fire-proof requirements of the cable for the high-torque robot, so that the cable can adapt to the complex working environment of the high-torque robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a cable specifically designed for high-torque robots; Figure 2 for Figure 1 A local enlarged view of point A; Figure 3 It is a schematic diagram of the structure of the inorganic mineral layer; Figure 4 for Figure 1 A partial enlarged view of point B.

[0021] Among them: 1-cable core; 2-inorganic mineral layer; 3-metal mesh; 4-flame retardant foaming layer; 5-thermal insulation and fire-resistant layer; 6-outer sheath; 7-flexible lining strip; 8-PVC particles; 21-inner mica tape layer; 22-inorganic mineral filling layer; 41-inner lining; 42-foaming layer; 43-arc-shaped convex part; 44-guide column; 100-spiral groove. DETAILED DESCRIPTION

[0022] Embodiment 1: A high torque robot dedicated cable of this embodiment, such as Figure 1 As shown, it includes a cable core 1, the outer sheath of the cable core 1 is provided with an inorganic mineral layer 2, the outer sheath of the inorganic mineral layer 2 is provided with a metal mesh 3, the outer sheath of the metal mesh 3 is provided with a flame retardant foam layer 4, the interior of the flame retardant foam layer 4 is provided with a plurality of cavities with built-in flame retardant gas, and heat dissipation holes penetrating the inner and outer sides of the flame retardant foam layer 4 are provided between adjacent cavities; the outer sheath of the flame retardant foam layer 4 is provided with a heat insulating and fire resistant layer 5, the outer sheath of the heat insulating and fire resistant layer 5 is provided with an outer sheath 6, a plurality of flexible lining strips 7 are uniformly arranged along the circumferential direction between the heat insulating and fire resistant layer 5 and the outer sheath 6, and the interior of the flexible lining strips 7 is filled with a flame retardant.

[0023] The inorganic mineral layer 2 disposed on the outside of the cable core 1 protects the cable core 1 through the excellent insulation, acid and alkali resistance, and heat insulation of the inorganic mineral layer 2 itself. At the same time, the metal mesh 3 disposed on the outside of the inorganic mineral layer 2 can ensure that when the cable burns, the inorganic mineral layer 2 can be tightly wrapped on the outside of the cable core 1 to prevent the inorganic mineral layer 2 from scattering. The flame-retardant foam layer 4 and the heat-insulating fire-resistant layer 5 on the outside of the metal mesh 3 jointly form a heat-insulating flame-retardant functional layer. Regardless of whether the cable is burning inside or outside the cable, the excellent heat-insulating fire-resistant properties of the flame-retardant foam layer 4 and the heat-insulating fire-resistant layer 5 can firstly prevent the fire from rapidly expanding and spreading. At the same time, when the flame-retardant foam layer 4 is damaged, the flame-retardant gas in the dense cavity inside the flame-retardant foam layer 4 is released, thereby preventing or delaying the spread of the fire. At the same time, a number of flexible lining strips 7 made of rubber material are arranged on the outer circumference of the heat-insulating fire-resistant layer 5. When the cable is not burning, the flexible lining strips 7 play a role of shock-proof buffering. When the cable is compressed or twisted, the flexible lining strips 7 are elastically deformed but not damaged, so as to buffer and weaken the pressure or twisting force on the cable, thereby improving the compression and twisting resistance of the robot-specific cable. When the flexible lining strips 7 are burned and damaged, the flame retardant filled in the flexible lining strips 7 is released to prevent or slow down the spread of fire.

[0024] Furthermore, the flame-retardant gas filled in the inner cavity of the flame-retardant foam layer 4 is nitrogen or carbon dioxide, and the flame retardant filled in the flexible lining strip 7 is a low-smoke halogen-free flame retardant.

[0025] Embodiment 2: This embodiment is further optimized on the basis of embodiment 1. Figure 2 As shown, the flame retardant foam layer 4 includes an inner sleeve 41 and a foam layer 42. The inner sleeve 41 is sleeved on the outside of the metal mesh 3. A plurality of arc-shaped protrusions 43 are evenly distributed along the circumferential direction on the outer surface of the inner sleeve 41. A plurality of guide pillars 44 are linearly arranged along the axial direction of the cable core 1 at the middle position of the arc-shaped protrusions 43. Heat dissipation holes are arranged inside the guide pillars 44. The outer side of the inner sleeve 41 is sleeved with a foam layer 42.

[0026] The inner sleeve 41 is made of high-polymer plastic or rubber material, and a plurality of arc-shaped protrusions 43 are evenly distributed axially on the outside of the inner sleeve 41. The arc-shaped protrusions 43 buffer the radial force exerted on the cable to a certain extent. At the same time, a guide column 44 is arranged in the middle position of the arc-shaped protrusion 43, and a heat dissipation hole is arranged inside the guide column 44. The heat dissipation hole can quickly transfer the heat emitted by the cable core 1 to the outside to avoid excessive internal temperature of the cable.

[0027] Furthermore, the mass ratio components of the foaming layer 42 are as follows: Polystyrene: 40-80%; PVC resin: 7.5%-15%; magnesium oxide or aluminum oxide: 2.5%-5%; halogen-free flame retardant: 1-25%; smoke suppressant: 1-3%; antioxidant: 0.1-2%; lubricant: 0.1-2%; foaming agent: 0.1-15%; other additives: 1.3-5.5%. The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0028] Embodiment 3: This embodiment is further optimized on the basis of the above embodiment 1 or 2. Figure 4 As shown, a plurality of spiral grooves 100 are evenly distributed along the circumferential direction on the inner side surface of the outer sheath 6 , and the flexible lining strips 7 are arranged along the spiral grooves 100 .

[0029] A plurality of spiral grooves 100 are provided on the inner side of the outer sheath 6 by spiral rolling, and a plurality of flexible lining strips 7 are provided along the spiral direction between the inner side of the outer sheath 6 and the outer side of the heat-insulating fire-resistant layer 5, thereby improving the compression and torsion resistance of the cable.

[0030] Furthermore, gaps are formed between adjacent flexible lining strips 7, and PVC particles 8 are arranged inside the gaps. When the flexible lining strips 7 are compressed or twisted, the flexible lining strips 7 are deformed and squeeze the PVC particles 8 in the gaps, and the friction between the PVC particles 8 further buffers and weakens the pressure or torsional force.

[0031] The other parts of this embodiment are the same as those of the above-mentioned embodiment 1 or 2, and thus will not be described in detail.

[0032] Embodiment 4: This embodiment is further optimized on the basis of any one of the above embodiments 1-3. The metal mesh 3 is woven by copper wires with a diameter of 0.3-0.4 mm, and the weaving density of the metal mesh 3 is greater than or equal to 85%.

[0033] The copper rod substrate is drawn into a thick copper wire with a diameter of 2.52 mm, and then the thick copper wire is drawn again into a medium copper wire with a diameter of 0.6 mm, and the medium copper wire is drawn again into a thin copper wire with a diameter of 0.15 mm, and the thin copper wire is annealed to obtain a soft copper wire to ensure the toughness of the metal mesh finally woven. 2-3 thin copper wires are twisted to form a braided wire, and the braided wire is woven to form a metal mesh 3, and the braiding density of the metal mesh 3 is ensured to be about 90%.

[0034] The other parts of this embodiment are the same as any one of the above embodiments 1-3, so they are not repeated here.

[0035] Embodiment 5: This embodiment is further optimized based on any one of the above embodiments 1-4. Figure 3 As shown, the inorganic mineral layer 2 includes an inner mica tape layer 21 and an inorganic mineral filling layer 22 . The inner mica tape layer 21 is wound around the outside of the cable core 1 , and the inorganic mineral filling layer 22 is filled between the outer side of the inner mica tape layer 21 and the metal mesh 3 .

[0036] The inner mica tape layer 21 is wrapped around the outside of the cable core 1 in a forward and reverse double spiral winding manner to form an insulating layer with a thickness of 1-2 mm. Then, a metal mesh 3 is sleeved on the outside of the inner mica tape layer 21, and an inorganic mineral filling layer 22 is filled between the inner mica tape layer 21 and the metal mesh 3, finally achieving a tight wrapping of the inorganic mineral layer 2 on the outside of the cable core 1.

[0037] Furthermore, the average particle size of the inorganic mineral filling layer 22 is 4 μm.

[0038] The other parts of this embodiment are the same as any one of the above embodiments 1-4, so they are not repeated here.

[0039] Embodiment 6: A method for preparing a high-torque robot-specific cable comprises the following steps: Step 1, twisting to form a cable core 1, and winding an inner mica tape in a forward and reverse double helix direction on the outside of the cable core 1, and sleeved with a metal mesh 3, wrapping an outer mica tape on the outside of the metal mesh 3, and filling an inorganic mineral material between the inner mica tape and the metal mesh 3 to form an insulating inorganic mineral layer 2; Step 2, extruding the flame retardant foam material by a hot extrusion process, and filling the molten flame retardant foam material with flame retardant gas during the extrusion of the flame retardant foam layer 4, so as to form a cavity with built-in flame retardant gas inside the formed flame retardant foam layer 4; Step 3, a plurality of heat dissipation holes are formed on the flame retardant foam layer 4, and then the flame retardant foam layer 4 is sleeved on the outside of the metal mesh 3, and then a heat insulating refractory cloth is wrapped around the outside of the flame retardant foam layer 4 by a wrapping process to form a heat insulating refractory layer 5; Step 4: a flexible lining strip 7 is spirally arranged on the outer circumference of the heat-insulating fire-resistant layer 5, and PVC particles 8 are filled in the gaps between adjacent flexible lining strips 7; Step 5: Form an outer sheath 6 on the outside of the flexible lining strip 7, and spray a wear-resistant coating on the outer surface of the outer sheath 6 to form a wear-resistant layer.

[0040] Furthermore, in step 1, one end of the metal mesh 3 is tied and gathered with a cable tie, and then the area between the metal mesh 3 and the inner mica tape is filled with inorganic mineral material. Every 5 m of filling, the inorganic mineral material is vibrated to make the inorganic mineral material densely filled.

[0041] In this embodiment, at least six flexible lining strips 7 are evenly arranged along the circumferential direction between the outer sheath 6 and the heat-insulating fire-resistant layer 5. When the cable is compressed and twisted, the elastic deformation of the flexible lining strips 7 can improve the cable's compression and torsion resistance. When the cable burns, the flame retardant inside the flexible lining strips 7 is released to prevent or delay the fire, thereby improving the cable's flame retardant performance. At the same time, in this embodiment, a heat-insulating flame-retardant functional layer is formed by arranging a flame-retardant foaming layer 4 and a heat-insulating fire-resistant layer 5, which can effectively isolate high temperature, effectively prevent the cable from burning when the fire is small, and effectively delay the cable's burning speed when the fire is large. Through the above-mentioned settings, the cable of this embodiment is more suitable for the working scene of a high-torque robot, so that the cable itself has certain compression and torsion resistance, as well as excellent heat-insulating and flame-retardant properties, which can ensure the normal and stable use of the cable for a long time.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high torque robot dedicated cable, comprising a cable core (1), characterized in that: The cable core (1) is sheathed with an inorganic mineral layer (2) on the outside, the inorganic mineral layer (2) is sheathed with a metal mesh (3) on the outside, the metal mesh (3) is sheathed with a flame retardant foam layer (4) on the outside, the flame retardant foam layer (4) is provided with a plurality of cavities with internal flame retardant gas, and heat dissipation holes penetrating the inner side and outer side of the flame retardant foam layer (4) are provided between adjacent cavities; the flame retardant foam layer (4) is sheathed with a heat insulating fire resistant layer (5) on the outside, the heat insulating fire resistant layer (5) is sheathed with an outer sheath (6) on the outside, a plurality of flexible lining strips (7) are uniformly arranged along the circumferential direction between the heat insulating fire resistant layer (5) and the outer sheath (6), and the interior of the flexible lining strips (7) is filled with a flame retardant.

2. A high torque robot dedicated cable according to claim 1, characterized in that: The flame retardant foam layer (4) comprises an inner sleeve (41) and a foam layer (42); the inner sleeve (41) is sleeved on the outside of the metal mesh (3); a plurality of arc-shaped protrusions (43) are evenly distributed along the circumferential direction on the outer surface of the inner sleeve (41); a plurality of guide pillars (44) are linearly arranged in the middle position of the arc-shaped protrusions (43) along the axial direction of the cable core (1); heat dissipation holes are arranged inside the guide pillars (44); and the foam layer (42) is sleeved on the outside of the inner sleeve (41).

3. A high torque robot-specific cable according to claim 2, characterized in that: The mass ratio of the components of the foaming layer (42) is as follows: Polystyrene: 40-80%; PVC resin: 7.5%-15%; Magnesium oxide or aluminum oxide: 2.5%-5%; Halogen-free flame retardant: 1-25%; Smoke suppressant: 1-3%; Antioxidant: 0.1-2%; Lubricant: 0.1-2%; Foaming agent: 0.1-15%; Other additives: 1.3-5.5%.

4. A high torque robot-specific cable according to any one of claims 1 to 3, characterized in that: A plurality of spiral grooves (100) are evenly distributed along the circumferential direction on the inner side surface of the outer sheath (6), and the flexible lining strip (7) is arranged along the spiral grooves (100).

5. A high torque robot-specific cable according to claim 4, characterized in that: Gaps are formed between adjacent flexible lining strips (7), and PVC particles (8) are arranged inside the gaps.

6. A high torque robot-specific cable according to any one of claims 1 to 3, characterized in that: The metal mesh (3) is woven from copper wires with a diameter of 0.3-0.4 mm, and the weaving density of the metal mesh (3) is greater than or equal to 85%.

7. A high torque robot-specific cable according to any one of claims 1 to 3, characterized in that: The inorganic mineral layer (2) comprises an inner mica tape layer (21) and an inorganic mineral filling layer (22); the inner mica tape layer (21) is wound around the outside of the cable core (1); and the inorganic mineral filling layer (22) is filled between the outer side surface of the inner mica tape layer (21) and the metal mesh (3).

8. A high torque robot-specific cable according to any one of claims 1 to 3, characterized in that: The average particle size of the inorganic mineral filling layer (22) is 4 μm.

9. A method for preparing a special cable for a high torque robot, used for preparing the cable according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, twisting to form a cable core (1), and winding an inner mica tape in a forward and reverse double helix direction on the outside of the cable core (1), and sleeved with a metal mesh (3), wrapping an outer mica tape on the outside of the metal mesh (3), and filling an inorganic mineral material between the inner mica tape and the metal mesh (3) to form an insulating inorganic mineral layer (2); Step 2, extruding the flame retardant foam material by a hot extrusion process, and injecting a flame retardant gas into the molten flame retardant foam material during the process of extruding the flame retardant foam layer (4), so as to form a cavity with a built-in flame retardant gas inside the formed flame retardant foam layer (4); Step 3, a plurality of heat dissipation holes are formed on the flame retardant foam layer (4), and then the flame retardant foam layer (4) is sleeved on the outside of the metal mesh (3), and then a heat insulating fire resistant cloth is wrapped around the outside of the flame retardant foam layer (4) by a wrapping process to form a heat insulating fire resistant layer (5); Step 4: a flexible lining strip (7) is spirally arranged on the outside of the heat-insulating fire-resistant layer (5), and PVC particles (8) are filled in the gaps between adjacent flexible lining strips (7); Step 5: Forming an outer sheath (6) on the outside of the flexible lining strip (7), and spraying a wear-resistant coating on the outer surface of the outer sheath (6) to form a wear-resistant layer.

10. The method for preparing a high torque robot-specific cable according to claim 9, characterized in that: In step 1, one end of the metal mesh (3) is tied and gathered with a cable tie, and then the inorganic mineral material is filled in the area between the metal mesh (3) and the inner mica tape. Every time a length of 5 m is filled, the inorganic mineral material is vibrated to ensure that the inorganic mineral material is filled densely.

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