Composite steel wire rope for mine hoisting and manufacturing method thereof

Abstract

According to the composite steel wire rope for mine hoisting and the manufacturing method of the composite steel wire rope, the center strand is made of the aramid fibers, meanwhile, the rope core strand formed by twisting the filaments formed by melting and drawing various high-strength fibers is twisted outside the center strand, and the strength and the tensile property of the composite rope core are greatly improved; and the high-toughness corrosion-resistant steel wire rope has good toughness and corrosion resistance, and is suitable for mine environments and high-load applications thereof. Meanwhile, a graphite fluoride coating is arranged outside the inner-layer strand, and a polytetrafluoroethylene coating is arranged outside the outer-layer strand, so that the friction among the inner-layer strand, the outer-layer strand, the filling strand and the special-shaped steel wires during use can be reduced, and the inner-layer strand and the outer-layer strand have excellent corrosion resistance; the inner-layer strands and the outer-layer strands can keep good performance in a severe environment; in addition, through filling of the filling strands and the special-shaped steel wires, the compactness of the steel wire rope is increased, the whole structure of the steel wire rope is firmer, tighter and more pressure-resistant, and the mechanical property of the steel wire rope is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire rope manufacturing, and in particular to a composite steel wire rope for mine hoisting and a manufacturing method thereof. Background Art

[0002] Mine hoisting wire rope refers to the wire rope used to connect the hoisting container and transmit the power of the mine hoisting machine. It is an important part of the wire rope hoisting equipment.

[0003] Mine hoisting wire ropes are mainly used to connect hoisting containers (such as cages, skips, etc.) and hoists in mines, transmit the power generated by hoists, realize the transportation of ore, coal, waste rock or gangue, and lift personnel, equipment and equipment. Therefore, the weight that needs to be lifted in mines is often very large and will be subjected to complex stresses, including stretching, bending, torsion, etc., which places high requirements on the strength, bearing capacity, tensile resistance and stability of the wire rope to ensure the safety and stability of the lifting process.

[0004] At the same time, the mine environment is usually harsh, with a large amount of corrosive media, such as mine water, acidic gas, etc. These corrosive media will cause serious corrosion to the wire rope, reducing its service life and safety.

[0005] Therefore, it is of great significance to manufacture a mine hoisting wire rope with high strength, strong tensile strength and good corrosion resistance to ensure that the wire rope can be used safely for a long time in a mine environment. Summary of the invention

[0006] In view of the fact that mine wire ropes in the prior art have high requirements on the strength, tensile strength and corrosion resistance of the wire ropes due to the use environment and use scenarios, the present invention proposes a composite steel wire rope for mine hoisting and a manufacturing method thereof.

[0007] A composite steel wire rope for mine hoisting, comprising a composite rope core, 5 inner strands, 10 outer strands and a protective layer, including: the composite rope core comprises a central strand made of aramid fiber braiding and a rope core strand made of a plurality of nylon fibers, sisal fibers, glass fibers and polyester fibers twisted into filaments by melt drawing; the rope core strands are twisted on the outside of the central strands in a line contact state; the inner strands are twisted on the outside of the composite rope core in a line contact state, and the surface of the inner strands is wrapped with a fluorinated graphite coating; the outer gaps of the adjacent inner strands are filled with a filling strand; the outer strands are twisted on the outside of the inner strands in a surface contact state, and the surface of the outer strands is wrapped with a polytetrafluoroethylene coating; the outer gaps of the adjacent outer strands are filled with a special-shaped steel wire; the protective layer comprises a corrosion-resistant layer and a wear-resistant layer, the corrosion-resistant layer is evenly wrapped on the outer surface of the outer strands, and the wear-resistant layer is arranged on the corrosion-resistant layer.

[0008] Preferably, a sound-proof layer is provided between the outer layer and the corrosion-resistant layer, and the sound-proof layer includes a first rubber layer and a second rubber layer uniformly wrapped around the outside of the first rubber layer, and a plurality of rubber support plates are provided between the first rubber layer and the second rubber layer, and the two ends of the rubber support plates are respectively connected to the first rubber layer and the second rubber layer.

[0009] Preferably, the rubber support plate includes a first rubber support plate and a second rubber support plate, the first rubber support plate is evenly distributed between the first rubber layer and the second rubber layer, and the two ends of the first rubber support plate in the width direction are fixedly connected to the first rubber layer and the second rubber layer respectively; the second rubber support plate is respectively arranged between two adjacent first rubber support plates, and one end of each second rubber fixing plate in the width direction is connected to an end of the adjacent first rubber support plate close to the first rubber plate, and the other end is connected to an end of another adjacent first rubber support plate close to the second rubber plate; and the first rubber support plate and the second rubber support plate are both filled with polyester fiber sound-absorbing cotton.

[0010] Preferably, the inner strands include an inner strand core and a plurality of outer thin steel wires twisted in line contact and spirally wrapped around the inner strand core; the inner strand core includes an aramid fiber rope and a plurality of carbon fiber ropes and inner thin steel wires twisted in an interlaced spiral around the outer layer of the aramid fiber rope.

[0011] Preferably, the outer strands include an outer strand core, a plurality of middle layer thick steel wires spirally twisted in surface contact with the outer strand core, and an outer layer thick steel wire spirally twisted in surface contact with the outside of the middle layer thick steel wire; the outer strand core includes a core steel wire and a plurality of inner layer thick steel wires spirally twisted in surface contact with the outside of the strand core steel wire.

[0012] Preferably, the filling strand comprises a polyester fiber strand core and a plurality of filling steel wires uniformly twisted around the outer side of the polyester fiber strand core in a surface contact state.

[0013] Preferably, a water-blocking yarn is further provided between the outer strand and the special-shaped steel wire.

[0014] The present invention also provides a method for manufacturing a composite steel wire rope for mine hoisting, which is suitable for manufacturing a composite steel wire rope for mine hoisting as described above, including: S1, making a composite rope core: selecting raw materials in order according to a weight percentage of 40:15:5:10:4:2:2.5: nylon fiber, sisal fiber, glass fiber, polyester fiber, plasticizer, stearic acid, antioxidant, and mixing the raw materials to form filaments after melt drawing, and twisting a number of the filaments to form a rope core strand, and the rope core strand is spirally twisted in a line contact state on the outside of a center strand made of aramid fiber to form the composite rope core; S2, oiling the composite rope core: drying the composite rope core under vacuum conditions for 1-1.5 hours, and then pressing it under vacuum The galvanized steel wire is obtained by rough drawing of high-carbon steel high-quality carbon wire rods as rough drawing blanks, and the rough drawing blanks are subjected to heat treatment and hot-dip galvanizing processes to obtain heat-treated galvanized steel wires, which are then drawn through a wire drawing machine to obtain galvanized steel wires of different specifications; S4, twisting of inner layer strands 2: aramid fiber ropes, carbon fiber ropes and galvanized steel wires of corresponding specifications are selected; the aramid fiber ropes and carbon fiber ropes are dried, compacted by a machine, heated and pressurized to solidify and form, and then several galvanized steel wires and carbon fiber ropes of the same specifications as the carbon fiber ropes are taken around an aramid fiber rope, arranged in an interlaced manner, and the aramid fiber ropes are spirally twisted to obtain an inner layer strand core; and then another specification of galvanized steel wires are selected. The galvanized steel wire is spirally twisted on the outside of the inner layer strand core in a line contact state to obtain the inner layer strand, and a fluorinated graphite coating is applied to the outside of the inner layer strand; S5, twisting of the filling strand and the outer layer strand: the galvanized steel wire is uniformly twisted into the outer layer strand through a certain arrangement mode, and the galvanized steel wire is spirally twisted on the outside of a polyester fiber strand core in a surface contact state to form the filling strand, and the galvanized steel wires of the outer layer strand and the filling strand are molded and forged from round to become regular shaped steel wires to form compacted strands, and a polytetrafluoroethylene coating is applied to the outer layer of the outer layer strand; S6, rope closing: the twisted composite rope core and 5 inner layer strands are arranged with a wire divider, deformed by a pre-deformer, and then the inner layer strands are twisted on the outside of the composite rope core with a wire pressing die, and the 5 filling strands are evenly arranged on the two inner strands. The gaps between the strands are twisted together, and then a wire crimping die is used to twist 10 outer strands to the outside of the inner strands, and a roller compactor is used to compact them. Then 10 galvanized steel wires are evenly arranged in the gaps between the two outer strands and twisted together. Finally, a roller compactor is used to compact the galvanized steel wires in the gaps to form special-shaped steel wires. Finally, the stress is eliminated through a pre-deformer to obtain a steel wire rope body without a protective layer; S7, oiling the surface of the steel wire rope body: using a dipping method, the twisted steel wire rope body is pressed into molten grease for oiling, and the dipping time is 1-1.5h; S8: preparation of a protective layer: a corrosion-resistant layer and a wear-resistant layer 51 are sequentially arranged on the outside of the oiled steel wire rope body to obtain the composite steel wire rope for mine hoisting.S9. Wire rope straightening and oil content testing: Straighten the prepared wire rope to fully eliminate residual stress; then use the hydraulic cutter to cut part of the wire rope as a sample for oil content testing to check whether the oil content of the prepared wire rope meets the preset requirements.

[0015] Preferably, the specific steps of step S1 are as follows: S11, selecting raw materials in order according to the weight percentage of 40:15:5:10:4:2:2.5: nylon fiber, sisal fiber, glass fiber, polyester fiber, plasticizer, stearic acid, antioxidant; S12, placing the nylon fiber, sisal fiber, glass fiber, and polyester fiber in a pulverizer for pulverization, and then feeding them into a grinder for grinding, and then feeding the ground raw materials into a mixer for mixing to obtain a raw material mixture; S13, adding a predetermined amount of plasticizer, stearic acid, and antioxidant to the raw material mixture for pulverization; After mixing, the mixture is sent to a drying device for drying. The dried mixture is extruded through the screw of a twin-screw extruder and melted into a molten spinning solution. The molten spinning solution is spun through a spinning assembly to form filaments; S14, the filaments are cooled, blown, cooled and solidified, and the solidified filaments are rolled into a composite rope core strand; S15, a number of the prepared filaments are selected and twisted to form a rope core strand, and the rope core strand is spirally twisted in a line contact state on the outside of a center strand made of aramid fiber to form the composite rope core.

[0016] Preferably, the oil content detection method of the steel wire rope in step S9 is specifically as follows: S91: using a hydraulic cutter to cut off part of the prepared steel wire rope as a sample, after removing the protective layer, the steel wire rope body is split into a rope core sample including a composite rope core and an inner layer strand rope core, and a strand rope sample including each layer of steel wire strands including an inner layer strand, an outer layer strand, a filling strand, and a special-shaped steel wire; S92: drying the strand rope sample after repeated immersion and heating operations, and weighing the weight of the strand rope sample after drying; S93: after drying the core rope sample, repeating the immersion and heating operations for multiple times, drying it for a second time, and weighing the weight of the core rope sample after drying; S94: filtering the immersion solution of the strand rope sample to obtain filtered impurities, drying the filtered impurities and cooling them, and then weighing the weight of the filtered impurities; S95: calculating and obtaining the oil content of the steel wire rope to be tested based on the weight of the strand rope sample and the rope core sample before and after the measurement operation and the weight of the filtered impurities.

[0017] The beneficial effects of the present invention are as follows: a composite steel wire rope for mine hoisting provided by the present invention comprises a composite rope core, an inner layer strand, an outer layer strand, a filling strand and a protective layer, and a central strand made of aramid fiber is used to improve the bearing capacity and tensile resistance of the composite rope core. At the same time, the rope core strands made by twisting a plurality of high-strength fibers into filaments through melt drawing are twisted outside the central strand, which greatly improves the strength and tensile resistance of the composite rope core, so that the composite rope core can withstand greater tension, and has good toughness and corrosion resistance, and is suitable for mine environments and high-load applications. At the same time, by arranging a fluorinated graphite coating on the outside of the inner strands and a polytetrafluoroethylene coating on the outside of the outer strands, not only can the friction between the inner strands, outer strands, filling strands and special-shaped steel wires be reduced during use, but also the inner strands and outer strands have excellent corrosion resistance, so that the inner strands and outer strands 3 can maintain good performance in harsh environments; in addition, by filling the filling strands and special-shaped steel wires, the density of the wire rope is increased, the overall structure of the wire rope is made stronger, tighter and more compression-resistant, the deflection between the inner strands and the outer strands is reduced, and sufficient support is ensured for the wire rope during use. The resulting wire rope has high rotation resistance and corresponding high tensile strength, thereby improving the mechanical properties and breaking force of the wire rope.

[0018] The present invention also provides a method for manufacturing a steel wire rope for mine hoisting, wherein the core strands are formed by twisting the core strands of nylon fiber, sisal fiber, glass fiber, polyester fiber into a wire strip by melt drawing, so that the composite rope core formed by twisting the core strands with the center strands has high strength and tensile resistance, and is suitable for various mine environments and high-load applications. At the same time, the inner strands adopt a combination of aramid fiber rope, carbon fiber rope and galvanized steel wire, which can not only improve the strength of the inner strands, but also make the inner strands have the characteristics of high temperature resistance and corrosion resistance, and also help to reduce the weight of the inner strands, making the entire steel wire rope lighter, improving working efficiency and reducing energy consumption. In addition, the residual stress of the steel wire rope is eliminated by straightening treatment, and its straightness and performance are improved. The oil content detection ensures that the oil content of the steel wire rope meets the preset requirements, ensures its lubricity and corrosion resistance during use, and is conducive to improving the manufacturing quality of the steel wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a composite steel wire rope for mine hoisting according to the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0021] Figure 3 It is a schematic diagram of the structure of the composite rope core of the present invention;

[0022] Figure 4This is a schematic diagram of the structure of the inner layer strand 2 of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the outer strand 3 of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the filling strand of the present invention;

[0025] Figure 7 The present invention is a schematic flow chart of a method for manufacturing a composite steel wire rope for mine hoisting.

[0026] Figure ID

[0027] 1. Composite rope core; 11. Center strand; 12. Rope core strand; 2. Inner strand; 21. Graphite fluoride coating; 22. Aramid fiber rope; 24. Carbon fiber rope; 3. Outer strand; 31. Polytetrafluoroethylene coating; 4. Filling strand; 41. Polyester fiber strand core; 42. Filling steel wire; 5. Protective layer; 51. Wear-resistant layer 52. Corrosion-resistant layer; 53. Sound-absorbing layer; 531. First rubber layer; 532. Second rubber layer; 533. Polyester fiber sound-absorbing cotton; 534. First rubber support plate; 535. Second rubber support plate; 6. Special-shaped steel wire. DETAILED DESCRIPTION

[0028] The embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] refer to Figure 1 As shown, a composite steel wire rope for mine hoisting includes a composite rope core 1, 5 inner strands, 10 outer strands 3 and a protective layer 5.

[0030] Specifically, refer to Figure 1 and Figure 3 As shown, the composite rope core 1 includes a central strand 11 made of aramid fiber and a rope core strand 12 made by twisting a plurality of nylon fibers, sisal fibers, glass fibers and polyester fibers through melt drawing to form filaments; the rope core strand 12 is twisted around the outside of the central strand 11 in a line contact state.

[0031] The central strand 11 made of aramid fiber is used, and the high strength and high modulus characteristics of aramid fiber are utilized, so that the central strand 11 of the composite rope core 1 can significantly improve the load-bearing capacity and tensile resistance of the composite rope core 1. At the same time, the rope core strand 12 is made by twisting a variety of high-strength fibers such as nylon fiber, sisal fiber, glass fiber and polyester fiber through melt drawing to form a wire strip, so that the rope core strand 12 has the advantages of nylon fiber, sisal fiber, glass fiber and polyester fiber, which can greatly improve the strength and tensile resistance of the composite rope core 1, and has good corrosion resistance, toughness and elasticity, so that the composite rope core 1 can withstand greater tension and friction, and is suitable for high-load applications during various mine hoisting, and is suitable for the harsh environment in the mine.

[0032] The inner strands 2 are twisted in a line contact state on the outside of the composite rope core 1, and the surface of the inner strands 2 is wrapped with a fluorinated graphite coating 21. The outer gaps of the adjacent inner strands 2 are filled with a filling strand 4. The fluorinated graphite coating 21 has an extremely low friction coefficient and excellent wear resistance. Coating it on the surface of the inner strands 2 can significantly reduce the friction between the inner strands 2 and the adjacent inner strands 2, the filling strands 4 and the outer strands 3, thereby reducing the friction resistance between the strands, making the rope strands smoother when pulled or rotated. At the same time, the fluorinated graphite coating 21 exhibits good chemical stability at room temperature and high temperature conditions, and is not easy to react with chemical substances such as acids and alkalis, so that the inner strands 2 maintain long-lasting and stable performance in the harsh environment of a mine.

[0033] Specifically, the inner strand 2 includes an inner strand core and a plurality of outer thin steel wires wrapped and twisted in line contact outside the inner strand core; the inner strand core includes an aramid fiber rope 22 and a plurality of carbon fiber ropes 23 and inner thin steel wires wrapped and twisted in staggered spirals on the outer layer of the aramid fiber rope. The aramid fiber rope 22 is woven from aramid fiber filaments, and the carbon fiber rope 23 is woven from carbon fiber filaments.

[0034] The aramid fiber rope 22 can provide good load-bearing capacity and tensile resistance for the inner strand core, and can maintain good strength and toughness during repeated bending, stretching and lifting. The carbon fiber rope 23 has excellent corrosion resistance, can resist the erosion of various chemical substances, and helps to protect the inner strand core from damage in harsh environmental conditions. The combined application of the aramid fiber rope 22 and the carbon fiber rope 23 can not only improve the strength of the inner strand 2, but also make the inner strand 2 have the characteristics of high temperature resistance and corrosion resistance, and can maintain good performance in the harsh environment of a mine. At the same time, it is also beneficial to reduce the weight of the inner strand 2, making the entire wire rope lighter, improving operating efficiency and reducing energy consumption.

[0035] The outer strands 3 are twisted in a surface contact manner on the outside of the inner strands 2, and the surface of the outer strands 3 are all wrapped with a polytetrafluoroethylene coating 31. The surface contact twisting increases the contact area between the outer strands, helps to disperse the stress, and reduces the internal stress concentration points, thereby improving the overall load-bearing capacity and rotation resistance of the wire rope. The polytetrafluoroethylene coating has an extremely low friction coefficient and excellent wear resistance, which can reduce the friction between the outer strands 3 and the inner strands 2, the filling strands 4 and other contact surfaces. At the same time, the polytetrafluoroethylene coating has excellent corrosion resistance to a variety of chemical substances, so that the outer strands 3 can maintain a good use state in harsh environments, reduce performance degradation and damage caused by external corrosion, and better adapt to the mine environment.

[0036] Specifically, the outer strand 3 includes an outer strand core, a plurality of middle-layer thick steel wires spirally twisted in a surface contact manner on the outer strand core, and an outer-layer thick steel wire spirally twisted in a surface contact manner on the outside of the middle-layer thick steel wire; the outer strand core includes a core steel wire and a plurality of inner-layer thick steel wires spirally twisted in a surface contact manner on the outside of the strand core steel wire. The outer strand 3 is made stronger and more stable as a whole by a multi-layer spiral twisting structure, thereby improving its strength and bearing capacity. The layers of steel wires are in surface contact with each other, and this contact mode helps to better disperse stress. When subjected to heavy load lifting, the surface contact design can reduce the internal stress concentration points of the outer strand 3, thereby improving the bearing capacity and durability of the outer strand 3.

[0037] Through the design of the composite rope core 1, the inner strands 2 and the outer strands 3, the steel wire rope has higher strength and corrosion resistance, and can withstand larger lifting loads and harsh working environments.

[0038] The filling strand 4 includes a polyester fiber strand core 41 and a plurality of filling steel wires 42 uniformly twisted around the polyester fiber strand core in a surface contact state. The polyester fiber strand core 41 is not easily deformed in the steel wire rope, and has the characteristics of oil absorption and oil storage, which can improve the good supporting effect. When the steel wire rope is in operation, the bending or stretching of the steel wire rope will cause the grease in the polyester fiber strand core to be squeezed out, flow out and soak into the steel wire of the corresponding rope strand for lubrication to reduce the friction between the strands, thereby reducing the generation of noise.

[0039] The outer gaps of the adjacent outer strands 3 are filled with a special-shaped steel wire 6. In this embodiment, the inner side of the special-shaped steel wire 6 is in contact with the outer surface of the outer strand 3, and the outer side is in contact with the inner surface of the protective layer 5, forming an arc-shaped structure. By filling the filling strands 4 and the special-shaped steel wire 6, the density of the steel wire rope is increased, so that the overall structure of the steel wire rope is more solid, tight and compression-resistant, and the deflection between the inner strands 2 and the outer strands 3 is reduced, ensuring that the steel wire rope has sufficient support during use. The steel wire rope has high anti-rotation strength and corresponding high tensile strength, which improves the mechanical properties and breaking tension of the steel wire rope.

[0040] The protective layer 5 includes a corrosion-resistant layer 52 and a wear-resistant layer 51, wherein the corrosion-resistant layer 52 is uniformly wrapped around the outer surface of the outer strand 3, and the wear-resistant layer 51 is disposed on the corrosion-resistant layer 52. The corrosion-resistant layer 52 and the wear-resistant layer 51 can protect the steel wire rope from erosion and corrosion by the external environment, adapt to various harsh use environments, and extend the service life of the steel wire rope.

[0041] In this embodiment, the wear-resistant layer 51 is an aluminum oxide coating, and the corrosion-resistant layer 52 is a phosphating corrosion-resistant layer. Aluminum oxide has high hardness and excellent wear resistance, and can form a protective layer with high hardness on the surface of the steel wire rope, effectively resisting external wear and extending the service life of the steel wire rope. The phosphating corrosion-resistant layer can form a dense phosphating film on the surface of the steel wire rope, which can effectively isolate corrosive substances in the external environment, such as moisture, oxygen, etc., thereby extending the service life of the steel wire rope.

[0042] Preferably, a sound-absorbing layer 53 is further provided between the outer layer 3 and the corrosion-resistant layer 52, and the sound-absorbing layer 53 includes a first rubber layer 531 and a second rubber layer 532 uniformly wrapped on the outside of the first rubber layer 531, and a plurality of rubber support plates (not shown in the figure) are provided between the first rubber layer 531 and the second rubber layer 532, and the two ends of the rubber support plates are respectively connected to the first rubber layer 531 and the second rubber layer 532, and polyester fiber sound-absorbing cotton 533 is filled between the rubber support plates.

[0043] The rubber support plate includes a first rubber support plate 534 and a second rubber support plate 535, wherein the first rubber support plate 534 is evenly distributed between the first rubber layer 531 and the second rubber layer 532, and the two ends of the first rubber support plate 534 along the width direction are respectively fixedly connected to the first rubber layer 531 and the second rubber layer 532; the second rubber support plate 535 is respectively arranged between two adjacent first rubber support plates 534, and one end of each second rubber fixed plate along the width direction is connected to an end of the adjacent first rubber support plate 534 close to the first rubber plate, and the other end is connected to an end of another adjacent first rubber support plate 534 close to the second rubber plate; and the polyester fiber sound-absorbing cotton 533 is filled between the first rubber support plate 534 and the second rubber support plate 535.

[0044] The first rubber layer 531 and the second rubber layer 532 serve as the basis of the soundproof layer 53, and can provide preliminary sound insulation and shock absorption effects. The rubber material itself has certain damping properties, and can absorb and reduce the vibration transmission of sound. At the same time, through the connection setting of the first rubber support plate 534 and the second rubber support plate 535 with the first rubber layer 531 and the second rubber layer 532, not only structural support is provided for the soundproof layer 53, but also a good anti-extrusion effect can be provided for the steel wire rope, and the elastic buffering performance of the steel wire rope can be effectively improved, and the pressure received by the steel wire rope can be reduced, thereby preventing the steel wire rope from deforming, so that it can adapt to a larger bearing capacity during lifting. The gap formed by the connection between the first rubber support plate 53, the second rubber support plate 535 and the first rubber layer 531, the second rubber layer 532 can not only further increase the propagation path and scattering of sound waves inside the material, which helps to improve the sound absorption efficiency; it also provides a filling gap for the polyester fiber sound-absorbing cotton 533. By filling the gap with polyester fiber sound-absorbing cotton 533, the sound absorption and noise reduction performance of the wire rope is greatly improved, and the noise that may be generated by the internal friction of the wire rope during operation and the noise transmitted from the outside of the wire rope can be effectively reduced, thereby achieving a noise reduction effect.

[0045] A water-blocking yarn (not shown in the figure) is also provided between the outer strands 3 and the shaped steel wires 6. The water-blocking yarn expands after absorbing water and fills the gap between the outer strands 3, which can effectively prevent moisture from entering the steel wire rope and causing the steel wire rope to rust, making the steel wire rope better adapted to the mine environment; it can also reduce the friction between the shaped steel wires 6 and the outer strands 3.

[0046] refer to Figure 6 As shown, the present invention also provides a method for manufacturing a composite steel wire rope for mine hoisting, which is suitable for manufacturing a composite steel wire rope for mine hoisting as described above, and includes steps S1 to S9.

[0047] Step S1, preparation of the composite rope core 1: selecting raw materials in order according to the weight percentage of 40:15:5:10:4:2:2.5: nylon fiber, sisal fiber, glass fiber, polyester fiber, plasticizer, stearic acid, antioxidant, mixing the above raw materials and forming filaments through melt drawing, twisting a number of the filaments to form a rope core strand 12, and spirally twisting the rope core strand 12 in a line contact state on the outside of a center strand 11 made of aramid fiber to form the composite rope core 1.

[0048] Specifically, the specific steps of step S1 are:

[0049] Step S11, selecting raw materials in order according to the weight percentage of 40:15:5:10:4:2:2.5: nylon fiber, sisal fiber, glass fiber, polyester fiber, plasticizer, stearic acid, antioxidant. Raw materials such as glass fiber have certain corrosion resistance, which can further improve the corrosion resistance of the composite rope core.

[0050] Step S12, nylon fiber, sisal fiber, glass fiber, and polyester fiber are respectively placed in a pulverizer for pulverization and then sent to a grinder for grinding, and then the ground raw materials are put into a mixer for mixing to obtain a raw material mixture. Through the processing of the pulverizer and the grinder, various fiber raw materials are refined to a smaller particle size, which helps to increase the contact area between the raw materials and improve the mixing effect.

[0051] Step S13, after adding a predetermined amount of plasticizer, stearic acid and antioxidant to the raw material mixture for mixing, the mixture is sent to a drying device for drying, the dried mixture is extruded by the screw of a twin-screw extruder, melted into a molten spinning solution, and the molten spinning solution is spun through a spinning assembly to form a filament. The plasticizer can improve the melting performance and processing performance of the raw material, making the formation of the filament more uniform and stable, and helping to improve the flexibility and fatigue resistance of the manufactured rope core strand 12. Stearic acid, as a lubricant, can reduce the friction and resistance of the raw material in the melt drawing process, and help to improve the smoothness and wear resistance of the rope core strand 12. The antioxidant can inhibit the oxidation and aging process of the raw material during processing and use.

[0052] Step S14, cooling and curing the filaments through cooling blowing, and the cured filaments are rolled into packages by a winding device to form a composite rope core with one strand of filaments.

[0053] Step S15, select a plurality of the prepared filaments and twist them together to form a rope core strand 12, and twist the rope core strand 12 in a line contact spirally around the outside of a center strand 11 made of aramid fiber to form the composite rope core 1. The center strand 11 made of aramid fiber is used as the center strand 11 of the composite rope core 1, and the high strength and high modulus characteristics of aramid fiber are utilized to significantly improve the load-bearing capacity and tensile strength of the composite rope core 1.

[0054] Step S2, oil immersion of the composite rope core 1: drying the composite rope core 1 under vacuum conditions for 1-1.5 hours, and then immersing it in oil under vacuum pressure for 2-2.5 hours to obtain a composite rope core 1 with a high oil content. Drying the composite rope core 1 under vacuum conditions can effectively remove moisture and volatile substances in the composite rope core 1. The vacuum oil immersion process allows the oil to be evenly distributed between the strands of the composite rope core 1.

[0055] Step S3, obtaining galvanized steel wire: rough drawing high-carbon steel high-quality carbon wire rod as rough drawn wire blank, and subjecting the rough drawn wire blank to heat treatment and hot-dip galvanizing process to obtain heat-treated galvanized steel wire, and then drawing the wire through a wire drawing machine to obtain galvanized steel wire of different specifications.

[0056] Step S4, twisting of the inner layer strand 2: select aramid fiber rope, carbon fiber rope and galvanized steel wire of corresponding specifications; dry the aramid fiber rope 22 and carbon fiber rope 23, compact them by machine, heat and pressurize them to solidify them into shape, take a number of galvanized steel wires and carbon fiber rope 23 with the same specifications as the carbon fiber rope, arrange them around an aramid fiber rope 22 in an alternating manner and spirally twist the aramid fiber rope 22 to obtain an inner layer strand core; then select a galvanized steel wire of another specification and spirally twist it around the inner layer strand core in a line contact state to obtain the inner layer strand 2, and coat the inner layer strand 2 with a graphite fluoride coating 21.

[0057] Step S5, twisting of filling strands 44 and outer strands 3: the galvanized steel wires are uniformly twisted into outer strands 3 in a certain arrangement, and the galvanized steel wires are spirally twisted on the outside of a polyester fiber strand core 41 in a surface contact state to form filling strands 44, and the galvanized steel wires of the outer strands 3 and the filling strands 44 are both molded and forged from round shapes into regular shaped steel wires to form compacted strands, and the outer layer strands 3 are coated with a polytetrafluoroethylene coating 31.

[0058] Step S6, rope closing: arrange the twisted composite rope core 1 and 5 inner layer strands 2 with a wire divider, deform them through a pre-deformer, then use a wire pressing die to twist the inner layer strand 2 on the outside of the composite rope core 1, evenly arrange the 5 filling strands 44 in the gap between the two inner layer strands 2 and twist them, then use a wire pressing die to twist 10 outer layer strands 3 to the outside of the inner layer strand 2, and use a roller compactor to compact them, then evenly arrange 10 galvanized steel wires in the gap between the two outer layer strands 3 and twist them, finally use a roller compactor to compact the galvanized steel wires in the gap to form a special-shaped steel wire 6, and finally use a pre-deformer to eliminate stress to obtain a steel wire rope body without a protective layer 5.

[0059] Step S7, oiling the surface of the steel wire rope body: using a dipping method, the twisted steel wire rope body is pressed into molten grease for oiling, and the dipping time is 1-1.5 hours.

[0060] Step S8: Preparation of the protective layer 5: a corrosion-resistant layer 52 and a wear-resistant layer 51 are sequentially arranged outside the oil-coated steel wire rope body to obtain the composite steel wire rope for mine hoisting.

[0061] Step S9, straightening of the steel wire rope and detection of oil content: the prepared steel wire rope is straightened to fully eliminate residual stress; the residual stress of the steel wire rope is eliminated by straightening, and its straightness and performance are improved. The oil content detection ensures that the oil content of the steel wire rope meets the preset requirements, ensures its lubricity and corrosion resistance during use, and ensures the manufacturing quality of the steel wire rope.

[0062] The method for detecting the oil content of the steel wire rope in step S9 is specifically as follows:

[0063] S91: A portion of the prepared steel wire rope is cut off by a hydraulic cutter as a sample. After removing the protective layer 5, the steel wire rope body is split into a rope core sample including a composite rope core 1, a polyester fiber strand core 41, an aramid fiber rope 22, and a carbon fiber rope 23, and a strand rope sample including an inner layer strand 2, an outer layer strand 3, a filling strand 4, and a galvanized steel wire shaped steel wire 6.

[0064] S92: Repeat the soaking and heating operation for multiple times and then dry the yarn sample, and weigh the dried yarn sample. The multiple soaking and heating operations can remove excess grease on the surface of the yarn sample and immerse the grease into the soaking solution.

[0065] S93: After drying the rope core sample, repeat the soaking and heating operation for multiple times, dry it twice, and weigh the rope core sample after drying.

[0066] S94: filtering the soaking solution of the strand rope sample to obtain filtered impurities, drying and cooling the filtered impurities, and then weighing the filtered impurities.

[0067] S95: Calculate the oil content of the steel wire rope to be tested based on the weight of the strand rope sample and the rope core sample before and after the measurement operation and the weight of the filtered impurities.

[0068] Specifically, the calculation formula of the oil content of the steel wire rope is:

[0069] M=[(m1-m3)+(m4-m5)] / (m5+m3)×100%;

[0070] Wherein, M represents the oil content of the steel wire rope to be tested; m1 represents the weight of the strand rope sample before degreasing; m3 represents the weight of the strand rope sample after degreasing; m4 represents the weight of the rope core sample after removing moisture; and m5 represents the weight of the rope core sample after removing grease.

[0071] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A composite steel wire rope for mine hoisting, comprising a composite rope core, 5 inner strands, 10 outer strands and a protective layer, characterized in that: include: The composite rope core comprises a central strand made of aramid fiber and a rope core strand made of a plurality of nylon fibers, sisal fibers, glass fibers and polyester fibers twisted together by melt drawing to form a wire strip; the rope core strand is twisted around the outside of the central strand in a line contact state; The inner layer strands are twisted on the outside of the composite rope core in a linear contact state, and the surface of the inner layer strands is wrapped with a fluorinated graphite coating; the outer gaps of the adjacent inner layer strands are filled with a filling strand; The outer strands are twisted on the outside of the inner strands in a surface contact state, and the surface of the outer strands is wrapped with a polytetrafluoroethylene coating; the outer gaps of the adjacent outer strands are filled with a special-shaped steel wire; The protective layer comprises a corrosion-resistant layer and a wear-resistant layer. The corrosion-resistant layer is uniformly wrapped on the outer surface of the outer layer strand, and the wear-resistant layer is arranged on the corrosion-resistant layer.

2. A composite steel wire rope for mine hoisting according to claim 1, characterized in that: A sound-absorbing layer is also provided between the outer layer 3 and the corrosion-resistant layer. The sound-absorbing layer includes a first rubber layer and a second rubber layer uniformly wrapped around the outside of the first rubber layer. A plurality of rubber support plates are provided between the first rubber layer and the second rubber layer. Both ends of the rubber support plates are respectively connected to the first rubber layer and the second rubber layer, and polyester fiber sound-absorbing cotton is filled between the rubber support plates.

3. A composite steel wire rope for mine hoisting according to claim 2, characterized in that: The rubber support plate includes a first rubber support plate and a second rubber support plate, the first rubber support plate is evenly distributed between the first rubber layer and the second rubber layer, and the two ends of the first rubber support plate in the width direction are respectively fixedly connected to the first rubber layer and the second rubber layer; the second rubber support plate is respectively arranged between two adjacent first rubber support plates, and one end of each second rubber fixing plate in the width direction is connected to an end of the adjacent first rubber support plate close to the first rubber plate, and the other end is connected to an end of another adjacent first rubber support plate close to the second rubber plate; and the polyester fiber sound-absorbing cotton is filled between the first rubber support plate and the second rubber support plate.

4. A composite steel wire rope for mine hoisting according to claim 1, characterized in that: The inner strands include an inner strand core and a plurality of outer thin steel wires wrapped and twisted in line contact with each other outside the inner strand core; the inner strand core includes an aramid fiber rope and a plurality of carbon fiber ropes and inner thin steel wires wrapped and twisted in an interlaced and spiral manner outside the aramid fiber rope.

5. The composite steel wire rope for mine hoisting according to claim 1, characterized in that: The outer layer strands include an outer layer strand core, a plurality of middle layer thick steel wires spirally twisted in surface contact with the outer layer strand core, and an outer layer thick steel wire spirally twisted in surface contact with the outer side of the middle layer thick steel wire; the outer layer strand core includes a core steel wire and a plurality of inner layer thick steel wires spirally twisted in surface contact with the outer side of the strand core steel wire.

6. A composite steel wire rope for mine hoisting according to claim 1, characterized in that: The filling strand comprises a polyester fiber strand core and a plurality of filling steel wires uniformly twisted around the outer side of the polyester fiber strand core in a surface contact state.

7. A composite steel wire rope for mine hoisting according to claim 1, characterized in that: A water-blocking yarn is also arranged between the outer strand and the special-shaped steel wire.

8. A method for manufacturing a composite steel wire rope for mine hoisting, suitable for manufacturing a composite steel wire rope for mine hoisting as claimed in claim 1, characterized in that: include: S1. Preparation of composite rope core: selecting raw materials in order according to the weight percentage of 40:15:5:10:4:2:2.5: nylon fiber, sisal fiber, glass fiber, polyester fiber, plasticizer, stearic acid, antioxidant, mixing the raw materials and forming filaments through melt drawing, twisting a number of the filaments to form a rope core strand, and spirally twisting the rope core strand in a line contact state around the outside of a center strand made of aramid fiber to form the composite rope core; S2. Oil immersion of the composite rope core: drying the composite rope core under vacuum conditions for 1-1.5 hours, and then immersing it in oil under vacuum pressure for 2-2.5 hours to obtain a composite rope core with high oil content; S3. Obtaining galvanized steel wire: Rough drawing of high-carbon steel high-quality carbon wire rods as rough drawn wire blanks, and subjecting the rough drawn wire blanks to heat treatment and hot-dip galvanizing processes to obtain heat-treated galvanized steel wires, which are then drawn through a wire drawing machine to obtain galvanized steel wires of different specifications; S4, twisting of inner strands: select aramid fiber ropes, carbon fiber ropes and galvanized steel wires of corresponding specifications; dry the aramid fiber ropes and carbon fiber ropes, compact them with a machine, heat and pressurize them to solidify them, take a number of galvanized steel wires and carbon fiber ropes with the same specifications as the carbon fiber ropes, arrange them in a staggered manner around an aramid fiber rope, and spirally twist the aramid fiber rope to obtain an inner strand core; then select a galvanized steel wire of another specification and spirally twist it around the inner strand core in a line contact state to obtain an inner strand, and coat the outer surface of the inner strand with a graphite fluoride coating; S5. Twisting of filling strands and outer strands: The galvanized steel wires are uniformly twisted into outer strands in a certain arrangement, and the galvanized steel wires are spirally twisted in a surface contact state on the outside of a polyester fiber strand core to form filling strands, and the galvanized steel wires of the outer strands and the filling strands are molded and forged from round shapes into regular steel wires with special shapes to form compacted strands, and the outer layer of the outer strands is coated with a polytetrafluoroethylene coating; S6, rope closing: arranging the stranded composite rope core and 5 inner strands with a wire divider, deforming them through a pre-deformer, then twisting the inner strands on the outside of the composite rope core with a wire pressing die, evenly arranging the 5 filling strands at the gap between the two inner strands and twisting them, then twisting the 10 outer strands to the outside of the inner strands with a wire pressing die, and compacting them with a roller compactor, then evenly arranging 10 galvanized steel wires at the gap between the two outer strands and twisting them, finally compacting the galvanized steel wires at the gap with a roller compactor to form a special-shaped steel wire, and finally eliminating stress through a pre-deformer to obtain a steel wire rope body without a protective layer; S7. Oiling the surface of the wire rope: Use the dipping method to press the twisted wire rope into the melted grease for oiling. The dipping time is 1-1.5 hours. S8: Preparation of protective layer: a corrosion-resistant layer and a wear-resistant layer 51 are sequentially arranged outside the oil-coated steel wire rope body to obtain the composite steel wire rope for mine hoisting. S9. Wire rope straightening and oil content testing: Straighten the prepared wire rope to fully eliminate residual stress; then use the hydraulic cutter to cut part of the wire rope as a sample for oil content testing to check whether the oil content of the prepared wire rope meets the preset requirements.

9. The method for manufacturing a composite steel wire rope for mine hoisting according to claim 8, characterized in that: The specific steps of step S1 are: S11. Select the raw materials in order according to the weight percentage of 40:15:5:10:4:2:2.5: nylon fiber, sisal fiber, glass fiber, polyester fiber, plasticizer, stearic acid, antioxidant; S12, placing nylon fiber, sisal fiber, glass fiber, and polyester fiber in a pulverizer for pulverization, and then feeding them into a grinder for grinding, and then feeding the ground raw materials into a mixer for mixing to obtain a raw material mixture; S13, after adding a predetermined amount of plasticizer, stearic acid and antioxidant to the raw material mixture and mixing, sending the mixture into a drying device for drying treatment, extruding the dried mixture through the screw of a twin-screw extruder to melt into a molten spinning solution, and spinning the molten spinning solution through a spinning assembly to form filaments; S14, cooling and curing the filaments by cooling and blowing, and the cured filaments are rolled into a package by a winding device to form a composite rope core strand; S15, selecting a number of the prepared filaments and twisting them together to form a rope core strand, and spirally twisting the rope core strand in a line contact state around the outside of a center strand made of aramid fiber to form the composite rope core.

10. The method for manufacturing a composite steel wire rope for mine hoisting according to claim 8, characterized in that: The method for detecting the oil content of the steel wire rope in step S9 is specifically as follows: S91: A portion of the prepared steel wire rope is cut off by a hydraulic cutter as a sample. After removing the protective layer, the steel wire rope body is split into a rope core sample including a composite rope core and an inner layer rope core, and a rope strand sample including inner layer strands, outer layer strands, filling strands, and special-shaped steel wires; S92: Repeat the soaking and heating operation for multiple times and then dry the strand rope sample, and weigh the strand rope sample after drying; S93: After drying the rope core sample, repeat the soaking and heating operation for multiple times, dry it for a second time, and weigh the rope core sample after drying; S94: filtering the soaking solution of the strand rope sample to obtain filtered impurities, drying and cooling the filtered impurities, and then weighing the filtered impurities; S95: Calculate the oil content of the steel wire rope to be tested based on the weight of the strand rope sample and the rope core sample before and after the measurement operation and the weight of the filtered impurities.

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