Tensile wear-resistant photoelectric composite cable for mining coal mining machine and manufacturing method of tensile wear-resistant photoelectric composite cable

Abstract

The invention relates to the technical field of cables, and discloses a tensile wear-resistant photoelectric composite cable for a mining coal mining machine and a manufacturing method thereof.The tensile wear-resistant photoelectric composite cable comprises a cable core, an insulating layer and an outer sheath from inside to outside, a reinforcing layer is arranged between the insulating layer and the outer sheath, and a plurality of supporting frames are arranged outside the cable core; limiting grooves are formed in the outer portion of the outer sheath at equal intervals, reinforcing rings are arranged in the limiting grooves, and tensile ropes are connected between the multiple reinforcing rings. The reinforcing ring is composed of two arc-shaped circular rings, and a connecting mechanism is arranged between the two arc-shaped circular rings. The reinforcing rings generate flat deformation when being pulled, so that the limiting grooves generate an outward deformation trend along with the reinforcing rings, the supporting frames at the positions of the limiting grooves generate dislocation deformation, and the three groups of supporting frames tend to move coaxially, so that a cable core at the position is stretched and straightened, and the effect of stretching compensation of the cable is achieved; the cable core is prevented from being damaged in the cable process, and the safety of the cable in the using process is improved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a tensile and wear-resistant optical-electric composite cable for mining coal mining machines and its manufacturing method. Background Technology

[0002] In the process of coal mining, the coal mining machine is an important piece of industrial equipment in the coal mine. The coal mining machine is connected to the outside through a cable and uses the cable for power supply. Due to the special nature of the mining environment, the cables used in the coal mining machine need to have certain tensile strength and wear resistance.

[0003] In Chinese patent publication number CN216353484U, an anti-interference and wear-resistant optical-electric composite cable is disclosed, comprising a core wire. The core wire is wrapped from the inside out with an inner insulating sheath, an anti-delamination sheath, an anti-corrosion sheath, a nylon mesh sheath, a shielding sheath, and an outer insulating sheath. The outer insulating sheath has multiple wear-resistant ribs evenly arranged on its outer surface, and the wear-resistant ribs are integral with the outer insulating sheath. The anti-delamination sheath has multiple locking ribs on both its inner and outer surfaces, and the locking ribs are integral with the anti-delamination sheath. The outer surface of the inner insulating sheath and the inner surface of the anti-corrosion sheath have multiple grooves. The protective layer sheath engages with the grooves on the outer surface of the inner insulating sheath and the inner surface of the anti-corrosion sheath through the locking ribs.

[0004] Although multiple wear-resistant ribs are incorporated to reduce wear on the outer insulation sheath and prevent breakage when the cable is dragged on the ground, the wear-resistant ribs are designed as rectangular rings that are snapped onto the outside of the cable. While this reduces wear on the outer insulation sheath, pressure is directly applied to the cable through the wear-resistant ribs under pressure, creating shear force and increasing stress at the wear-resistant rib locations. This can easily lead to cable breakage at the wear-resistant rib locations. Furthermore, during use, the cable is subjected to both frictional loss and tensile force, and the tensile strength of the aforementioned invention relies solely on the material properties of the cable itself. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a tensile and wear-resistant optical-electric composite cable for mining coal mining machines and its manufacturing method, which has the advantages of good compressive and tensile strength, effectively dispersing the pressure on the cable, and improving the safety of cable use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A tensile and wear-resistant optical-electric composite cable for mining coal mining machines includes a cable core, an insulation layer, and an outer sheath from the inside out. A reinforcing layer is provided between the insulation layer and the outer sheath. Several support frames are provided on the outside of the cable core. Limiting grooves are equidistantly opened on the outside of the outer sheath. Reinforcing rings are provided inside the limiting grooves. Tensile ropes are connected between several reinforcing rings. The reinforcing ring is composed of two arc-shaped rings, and a connecting mechanism is arranged between the two arc-shaped rings.

[0007] Preferably: A steel wire core and a reinforcing rope are arranged outside the cable core. The cable core, the steel wire core and the reinforcing rope form an optical and electrical composite cable core assembly, and an insulating layer is wound around the outside of the core assembly.

[0008] Preferably: The core assembly passes through several support frames, and the insulating layer is coated on the outside of the support frames and the core assembly. The insulating layer has two layers. The insulating layer includes an inner layer of cross-linked polyethylene and an outer layer of ethylene-propylene rubber. The support frames at the position of the limiting groove are provided with outer protrusions. There are three groups of support frames in the limiting groove area. A spring rod is fixedly connected between the three groups of support frames. The spring rod is used to control the three groups of support frames to be distributed in a "convex" shape with dislocation, and the outer protrusion is arranged at the protruding position of the support frame.

[0009] Preferably: The reinforcing layer includes a spirally wound aramid fiber bundle and a galvanized steel wire composite layer, and also includes a bonding medium for bonding. The bonding medium includes an epoxy resin / polyurethane composite glue, which is used to stabilize the reinforcing layer after curing and at the same time assist in bonding the reinforcing layer and the insulating layer.

[0010] Preferably: Extension edges are fixedly connected to both sides of the arc-shaped ring. The extension edges of the two arc-shaped rings are mutually adhered. The adhered extension edges on any one side of the arc-shaped ring are welded and fixed. The extension edges on the same side of several reinforcing rings are welded and fixed.

[0011] Preferably: One end of the tensile rope is fixedly connected to the welded extension edge on one side, and the other end of the tensile rope is fixedly connected to the extension edge of the outer arc-shaped ring on the opening side. A positioning ring is sleeved outside the tensile rope.

[0012] Preferably: The connecting mechanism includes two support pieces. Several connecting ropes are arranged between the two support pieces. Fixing nails for fixing the connecting ropes are arranged at the ends of the connecting ropes. Connecting grooves are formed on the outer sides of the two support pieces. An elastic ring is fixedly connected between the two support pieces.

[0013] A manufacturing method for a tensile and wear-resistant optical and electrical composite cable for a mining coal mining machine, the steps of which include: Cable core preparation, including 2-core G.657A2 optical fibers, filling with water-blocking fiber paste; 3 pairs of AWG24 silver-plated copper wires, star-stranded arrangement with a pitch ratio of 18:1; 3 50mm² tinned copper conductors; filling a steel wire core and a reinforcing rope inside the arranged cable core, and at the same time sleeving several support frames, and the support frames are spaced and distributed outside the cable core; Insulating layer filling, double-layer co-extruding insulation through a co-extruder, with an inner layer of cross-linked polyethylene and an outer layer of ethylene-propylene rubber, where the inner layer thickness is 1.5 - 2.1mm and the outer layer is 0.2 - 0.7mm; The reinforcing layer is constructed by embedding a composite layer of spirally wound aramid fiber bundles and galvanized steel wires between the insulation layer and the outer sheath. The aramid fiber bundles are wound at a 30° angle to provide flexible tensile strength, while the galvanized steel wires are wound at a 60° reverse angle to enhance rigid support. The outer sheath is formed, including the outer layer and the inner layer, by a twin-screw co-extrusion machine, and the limiting groove is extruded at a spacing of 200-600mm; For the reinforcement layer installation, the inner arc-shaped ring is pressed into the limiting groove, the connecting mechanism is embedded, the outer arc-shaped ring is pressed in, and then two arc-shaped rings are welded together. The two adjacent arc-shaped rings are connected by tensile ropes.

[0014] Preferably, the aramid fiber bundle is made of 1414 type para-aramid, with 16 fibers per group, wound around the outside of the insulation layer at a left-hand helix angle of 30°, with a winding density of 8 turns / 100mm. The galvanized steel wire is a high-carbon steel wire with a diameter of 0.3 mm and a galvanized layer thickness of 20 μm, wound in a right-hand spiral angle of 60° in the opposite direction around the aramid layer. The ratio of the helical pitch of steel wire to aramid fiber is 2:1; Adhesive medium: Aramid bundles pre-impregnated with epoxy resin / polyurethane composite adhesive, which forms a flexible adhesive layer after curing.

[0015] Preferred: The outer layer is made of polyurethane; Additives: 15wt% modified polytetrafluoroethylene micro powder, particle size 5μm, surface treated with silane coupling agent; 3wt% silicon carbide nanowires, diameter 50nm, length 10μm; The inner layer is made of neoprene rubber; additives: 10wt% graphene / carbon black hybrid filler; 5wt% flame retardant, oxygen index ≥32%.

[0016] The beneficial effects of this invention are: 1. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines and its manufacturing method involve the reinforcing ring undergoing a flattening deformation under tension, which causes the limiting groove to follow the reinforcing ring and deform outwards. The support frame at the limiting groove position undergoes misalignment deformation, causing the three sets of support frames to move coaxially, thereby stretching and straightening the cable core at that position. This achieves the effect of cable tension compensation, avoids damage to the cable core during cable laying, and improves the safety of the cable during use.

[0017] 2. The tensile and wear-resistant optical composite cable for mining coal mining machines and its manufacturing method, wherein the cross-section is elliptical after the arc-shaped rings are combined. When the cable is subjected to pressure, the pressure acts on the surface of the reinforcing ring. The reinforcing ring can disperse the pressure to both sides, and the reinforcing ring tends to flatten and deform, further absorbing the pressure perpendicular to the cable, thereby reducing the pressure damage to the cable, avoiding pressure concentration that could lead to cable damage, and improving the cable's pressure-bearing capacity. Attached Figure Description

[0018] Figure 1 This is a partial schematic diagram of the cable of the present invention; Figure 2 This is a schematic diagram of the connection between the cable core and the support frame of the present invention; Figure 3 This is a schematic diagram of a partial cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of part A; Figure 5 This is a schematic diagram of the connection mechanism of the present invention; Figure 6 This is a schematic diagram of the inner and outer arc-shaped rings and the connecting mechanism of the present invention; Figure 7 This is a schematic diagram showing the pressure dispersion state when the inner and outer arc-shaped circles of the present invention are subjected to pressure.

[0019] In the diagram: 1. Cable core; 11. Support frame; 111. Outer protrusion; 12. Spring rod; 2. Steel wire core; 3. Reinforcing rope; 4. Insulation layer; 5. Reinforcing layer; 6. Outer sheath; 61. Limiting groove; 7. Reinforcing ring; 71. Arc-shaped ring; 72. Extended edge; 8. Tensile rope; 9. Positioning ring; 10. Connecting mechanism; 101. Support plate; 102. Connecting rope; 103. Fixing nail; 104. Connecting groove; 105. Elastic ring. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0021] Example 1 Please see Figure 1 - Figure 7 A tensile and wear-resistant optical composite cable for mining coal mining machines includes, from the inside out, a cable core 1, an insulation layer 4 and an outer sheath 6. A reinforcing layer 5 is provided between the insulation layer 4 and the outer sheath 6. Several support frames 11 are provided outside the cable core 1. Limiting grooves 61 are equidistantly opened on the outside of the outer sheath 6. Reinforcing rings 7 are provided inside the limiting grooves 61. Tensile ropes 8 are connected between several reinforcing rings 7. The reinforcing ring 7 is composed of two arc-shaped rings 71, and a connecting mechanism 10 is provided between the two arc-shaped rings 71.

[0022] Several support frames 11 are used to position the cable core 1 to prevent the cable core 1 from being misaligned. At the same time, the support frames 11 are used to provide support for the cable and increase the cable's compressive strength from the inside.

[0023] Furthermore, the reinforcing ring 7 is composed of two arc-shaped rings 71. The outer sheath 6 contacts the ground through the reinforcing ring 7. During the cable dragging process, the friction mainly occurs between the reinforcing ring 7 and the ground, thereby improving the friction resistance effect of the cable.

[0024] Reference Figure 7 , meanwhile, after the two arc-shaped rings 71 are combined, the cross-section is elliptical. When the cable bears pressure, the pressure acts on the surface of the reinforcing ring 7. The reinforcing ring 7 can disperse the pressure to both sides, and the reinforcing ring 7 tends to deform into a flattened shape, further absorbing the pressure perpendicular to the cable, thereby reducing the damage of the pressure to the cable and avoiding cable damage caused by pressure concentration, and improving the pressure-bearing effect of the cable.

[0025] Furthermore, when the cable is subjected to tension, the tensile ropes 8 are connected to the reinforcing rings 7 at both ends. Under the action of the pulling force, the reinforcing ring 7 tends to change into a flattened shape, and at the same time, the deformation of the reinforcing ring 7 absorbs the tensile force borne by the cable, improving the tensile effect of the cable.

[0026] Reference Figure 2 , in an optional embodiment, a steel wire core 2 and a reinforcing rope 3 are arranged outside the cable core 1. The cable core 1, the steel wire core 2 and the reinforcing rope 3 form an optical and electrical composite cable core assembly, and the insulating layer 4 is wound around the outside of the core assembly.

[0027] Reference Figure 2 , in an optional embodiment, the core assembly passes through a plurality of support frames 11. The insulating layer 4 is coated outside the support frames 11 and the core assembly. The insulating layer 4 has two layers. The insulating layer 4 includes an inner layer of cross-linked polyethylene and an outer layer of ethylene propylene rubber. An outer protrusion 111 is provided on the support frame 11 at the position of the limiting groove 61. There are three groups of support frames 11 in the area of the limiting groove 61. A spring rod 12 is fixedly connected between the three groups of support frames 11. The spring rod 12 is used to control the three groups of support frames 11 to be distributed in a "convex" shape with a dislocation, and the outer protrusion 111 is provided at the protruding position of the support frame 11.

[0028] In the initial state, the three groups of support frames 11 distributed in a "convex" shape with a dislocation drive the cable core 1 at the position of the limiting groove 61 to bend, so that the cable core 1 has a pulling rope margin.

[0029] When the insulating layer 4 is coated, the outer protrusion 111 of the support frame 11 protrudes to the outside of the insulating layer 4 and the reinforcing layer 5. The outer protrusion 111 is used to connect the outer sheath 6.

[0030] Specifically, when the cable is subjected to tensile deformation, the reinforcing ring 7 undergoes a flattening deformation, causing the limiting groove 61 to follow the reinforcing ring 7 and deform outwards. The support frame 11 at the position of the limiting groove 61 undergoes misalignment deformation, causing the three sets of support frames 11 to move coaxially, thereby stretching and straightening the cable core 1 at that position. This achieves the effect of cable tension compensation, preventing damage to the cable core 1 during cable operation and improving the safety of the cable during use.

[0031] Meanwhile, when the cable is bent, the reinforcing ring 7 at the protruding position flattens and deforms, while the reinforcing ring 7 at the concave position expands and deforms. At the same time, under the limiting action of the tension rope 8, the cable can be effectively prevented from bending, reducing conductor plastic deformation, reducing damage during the cable bending process, and ensuring the safety of the cable.

[0032] In an optional embodiment, the reinforcing layer 5 includes a composite layer of helically wound aramid fiber bundles and galvanized steel wire, and also includes an adhesive medium for bonding, the adhesive medium including epoxy resin / polyurethane composite adhesive, which, after curing, is used to stabilize the reinforcing layer 5 and at the same time assists in bonding the reinforcing layer 5 and the insulating layer 4.

[0033] It should be noted that the aramid fiber bundles are wound at a 30° angle to provide flexible tensile strength, while the steel wires are wound at a 60° reverse angle to enhance rigid support, thus offsetting the torsional stress during the movement of the coal mining machine in both directions.

[0034] refer to Figures 3-6 In one optional embodiment, the two sides of the arc-shaped ring 71 are fixedly connected with extension edges 72, the extension edges 72 of the two arc-shaped rings 71 are attached to each other, the attached extension edges 72 on either side of the arc-shaped ring 71 are welded and fixed, and the extension edges 72 on the same side of the several reinforcing rings 7 are welded and fixed.

[0035] It should be noted that by setting the extension edge 72, the stability of the splicing of the inner and outer arc-shaped rings 71 is increased. When the extension edge 72 is welded on one side, when the reinforcing ring 7 deforms, the reinforcing ring 71 on the open side is misaligned through the extension edge 72, thereby ensuring the stability of the deformation of the inner and outer arc-shaped rings 71.

[0036] In an optional embodiment, one end of the tensile rope 8 is fixedly connected to the welded extension edge 72 on one side, and the other end of the tensile rope 8 is fixedly connected to the extension edge 72 of the outer arc-shaped ring 71 on the open side. A positioning ring 9 is sleeved on the outside of the tensile rope 8.

[0037] It should be noted that the tensile rope 8 ensures the cooperation effect of several adjacent reinforcing rings 7. When the cable is stretched, the tensile rope 8 connects several reinforcing rings 7, and the axial strength of the cable is increased by the reinforcing rings 7 and the tensile rope 8, thereby improving the tensile strength of the cable.

[0038] In an optional embodiment, the connecting mechanism 10 includes two support plates 101, a plurality of connecting ropes 102 are disposed between the two support plates 101, the ends of the connecting ropes 102 are provided with fixing nails 103 for fixing the connecting ropes 102, the outer surfaces of the two support plates 101 are provided with connecting grooves 104, and an elastic ring 105 is fixedly connected between the two support plates 101.

[0039] The inner and outer arc-shaped rings 71 are connected by the connecting mechanism 10. The two support plates 101 are fixedly connected to the inner and outer arc-shaped rings 71 respectively. When the two arc-shaped rings 71 are misaligned, the arc-shaped rings 71 drive the two support plates 101 to misalign, and the two support plates 101 drive the elastic ring 105 to misalign and deform.

[0040] Furthermore, when the two arc-shaped rings 71 undergo flattening deformation, the two arc-shaped rings 71 drive the two support plates 101 to move closer to each other, and the two support plates 101 compress the elastic ring 105. The elastic ring 105 and the support plates 101 provide support and reinforcement for the two arc-shaped rings 71.

[0041] Two arc-shaped rings 71 are connected by a connecting mechanism 10. When the cable is subjected to tension or pressure, the two arc-shaped rings 71 flatten and deform. The arc-shaped rings 71 simultaneously drive the two support plates 101 to deform, further absorbing the tension or pressure on the cable, ensuring the safety of the cable and improving its service life.

[0042] Example 2 A method for manufacturing a tensile and wear-resistant optical-electric composite cable for a mining coal mining machine, comprising the following steps: Cable core 1 is prepared, including 2 G.657A2 optical fibers filled with water-blocking fiber grease; 3 pairs of AWG24 silver-plated copper wires arranged in a star strand with a pitch ratio of 18:1; 3 50mm² tin-plated copper conductors; steel wire core 2 and reinforcing rope 3 are filled inside the arranged cable core 1, and several support frames 11 are inserted at the same time, with the support frames 11 spaced on the outside of the cable core. Insulation layer 4 is filled with double-layer co-extruded insulation using a co-extrusion machine. The inner layer is cross-linked polyethylene, and the outer layer is ethylene propylene rubber. The thickness of the inner layer is 1.5-2.1 mm, and the thickness of the outer layer is 0.2-0.7 mm. The reinforcing layer 5 is made of a composite layer of spirally wound aramid fiber bundles and galvanized steel wires embedded between the insulation layer 4 and the outer sheath 6. The aramid fiber bundles are wound at a 30° angle to provide flexible tensile strength, and the galvanized steel wires are wound at a 60° reverse angle to enhance rigid support. The outer sheath 6 is formed, including an outer layer and an inner layer, by a twin-screw co-extrusion machine, and the limiting groove 61 is extruded at a spacing of 200-600mm; For the reinforcement layer installation, the inner arc-shaped ring 71 is pressed into the limiting groove 61, the connecting mechanism 10 is embedded, the outer arc-shaped ring 71 is pressed in, and then two arc-shaped rings 71 are welded together. The two adjacent arc-shaped rings 71 are connected by the tensile rope 8.

[0043] Among them, the aramid fiber bundles: 1414 type para-aramid fibers are selected, 16 fibers are grouped together, and wound around the outside of the insulation layer at a left-hand spiral angle of 30°, with a winding density of 8 turns / 100mm; Galvanized steel wire: High carbon steel wire with a diameter of 0.3mm and a zinc coating thickness of 20μm, wound in a right-hand spiral angle of 60° in the opposite direction around the aramid layer; The ratio of the spiral pitch of steel wire to aramid is 2:1, and the winding density is 8 turns / 100mm for aramid fiber bundles and 4 turns / 100mm for galvanized steel wire. Adhesive medium: Aramid bundles pre-impregnated with epoxy resin / polyurethane composite adhesive, which forms a flexible adhesive layer after curing.

[0044] The outer layer is made of polyurethane; additives include 15wt% modified polytetrafluoroethylene micro powder with a particle size of 5μm and a surface silane coupling agent treatment; and 3wt% silicon carbide nanowires with a diameter of 50nm and a length of 10μm. The inner layer is made of neoprene rubber; additives: 10wt% graphene / carbon black hybrid filler; 5wt% flame retardant, oxygen index ≥32%.

[0045] 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 tensile and wear-resistant photoelectric composite cable for mining coal mining machines, comprising, from the inside out, a cable core (1), an insulation layer (4), and an outer sheath (6), characterized in that: A strengthening layer (5) is provided between the insulating layer (4) and the outer sheath (6). A number of support frames (11) are provided outside the cable core (1). Limiting grooves (61) are equidistantly opened on the outside of the outer sheath (6). A strengthening ring (7) is provided inside the limiting grooves (61). A tensile rope (8) is connected between a number of strengthening rings (7); The strengthening ring (7) is composed of two arc-shaped rings (71), and a connecting mechanism (10) is provided between the two arc-shaped rings (71).

2. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines according to claim 1, characterized in that: A steel wire core (2) and a strengthening rope (3) are provided outside the cable core (1). The cable core (1), the steel wire core (2) and the strengthening rope (3) form an optical and electrical composite cable core assembly, and the insulating layer (4) is wound around the outside of the core assembly.

3. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines according to claim 2, characterized in that: The core assembly passes through a number of support frames (11). The insulating layer (4) covers the outside of the support frames (11) and the core assembly. The insulating layer (4) has two layers. The insulating layer (4) includes an inner layer of cross-linked polyethylene and an outer layer of ethylene-propylene rubber. The support frames (11) at the position of the limiting grooves (61) are provided with outer protrusions (111). There are three groups of support frames (11) in the area of the limiting grooves (61). A spring rod (12) is fixedly connected between the three groups of support frames (11). The spring rod (12) is used to control the three groups of support frames (11) to be distributed in a "convex" shape with a dislocation, and the outer protrusion (111) is arranged at the protruding position of the support frame (11).

4. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines according to claim 1, characterized in that: The strengthening layer (5) includes a spirally wound aramid fiber bundle and a galvanized steel wire composite layer, and also includes a bonding medium for bonding. The bonding medium includes an epoxy resin / polyurethane composite glue, which is used to stabilize the strengthening layer (5) after curing, and at the same time assist in bonding the strengthening layer (5) and the insulating layer (4).

5. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines according to claim 1, characterized in that: Extended edges (72) are fixedly connected to both sides of the arc-shaped ring (71). The extended edges (72) of the two arc-shaped rings (71) are mutually adhered. The adhered extended edges (72) on any one side of the arc-shaped ring (71) are welded and fixed. The extended edges (72) on the same side of a number of strengthening rings (7) are welded and fixed.

6. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines according to claim 5, characterized in that: One end of the tensile rope (8) is fixedly connected to the welded extended edge (72) on one side. The other end of the tensile rope (8) is fixedly connected to the extended edge (72) of the outer arc-shaped ring (71) on the opening side. A positioning ring (9) is sleeved outside the tensile rope (8).

7. The tensile and wear-resistant optical-electric composite cable for mining coal mining machines according to claim 5, characterized in that: The connecting mechanism (10) includes two support pieces (101). A number of connecting ropes (102) are provided between the two support pieces (101). Fixing nails (103) for fixing the connecting ropes (102) are provided at the ends of the connecting ropes (102). Connecting grooves (104) are opened on the outer side surfaces of the two support pieces (101). An elastic ring (105) is fixedly connected between the two support pieces (101).

8. A method for manufacturing a tensile and wear-resistant photoelectric composite cable for a mining coal mining machine, used to prepare the tensile and wear-resistant photoelectric composite cable for a mining coal mining machine as described in any one of claims 1-7, characterized in that, The steps include: Preparation of the cable core (1), including 2-core G.657A2 optical fibers, filled with water-blocking fiber paste; 3 pairs of AWG24 silver-plated copper wires, star-stranded arranged with a pitch ratio of 18:1; 3 50 mm² tinned copper conductors; filling the steel wire core (2) and the strengthening rope (3) inside the arranged cable core (1), and at the same time sleeving a number of support frames (11), and the support frames (11) are spaced and distributed on the outside of the cable core; The insulation layer (4) is filled by double-layer co-extrusion insulation using a co-extrusion machine. The inner layer is cross-linked polyethylene, and the outer layer is ethylene propylene rubber. The thickness of the inner layer is 1.5-2.1 mm, and the thickness of the outer layer is 0.2-0.7 mm. The reinforcing layer (5) is made by embedding a spirally wound aramid fiber bundle and galvanized steel wire composite layer between the insulation layer (4) and the outer sheath (6). The aramid fiber bundle is wound at a 30° angle to provide flexible tensile strength, and the galvanized steel wire is wound at a 60° reverse angle to enhance rigid support. The outer sheath (6) is formed, including an outer layer and an inner layer, by a twin-screw co-extrusion machine, and the limiting groove (61) is formed by extrusion at a spacing of 200-600mm. For the reinforcement layer installation, the inner arc-shaped ring (71) is pressed into the limiting groove (61), embedded in the connecting mechanism (10), and pressed into the outer arc-shaped ring (71). Then, two arc-shaped rings (71) are welded together, and two adjacent arc-shaped rings (71) are connected by tensile rope (8).

9. A method for manufacturing a tensile and wear-resistant optical-electric composite cable for a mining coal mining machine according to claim 8, characterized in that: The aramid fiber bundles are made of 1414 type para-aramid fibers, with 16 fibers per group, wound around the outside of the insulation layer at a left-hand helical angle of 30°, with a winding density of 8 turns / 100mm. The galvanized steel wire is a high-carbon steel wire with a diameter of 0.3 mm and a galvanized layer thickness of 20 μm, wound in a right-hand spiral angle of 60° in the opposite direction around the aramid layer. The ratio of the helical pitch of steel wire to aramid fiber is 2:1; Adhesive medium: Aramid bundles pre-impregnated with epoxy resin / polyurethane composite adhesive, which forms a flexible adhesive layer after curing.

10. A method for manufacturing a tensile and wear-resistant optical-electric composite cable for a mining coal mining machine according to claim 8, characterized in that: The outer layer is made of polyurethane; Additives: 15wt% modified polytetrafluoroethylene micro powder, 5μm in particle size, with surface silane coupling agent treatment; 3wt% silicon carbide nanowires, 50nm in diameter and 10μm in length; The inner layer is made of neoprene rubber; additives: 10wt% graphene / carbon black hybrid filler; 5wt% flame retardant, oxygen index ≥32%.

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