A durable heavy-duty mining operation tow cable

Abstract

The utility model provides a kind of durable heavy mining operation is dragged cable, belong to cable technical field, including outer sheath, outer sheath is wrapped with reinforcing layer, reinforcing layer is wrapped with inner sheath, inner sheath is wrapped with cable;Cable is supported in inner sheath inside by filling strip, including main wire core, ground core and monitoring wire core, main wire core and ground core are alternately arranged and wound in the outer periphery of filling strip, and monitoring wire core is arranged in the inside of filling strip;Monitoring wire core includes single reinforced nylon rope, multiple tinned copper wire and monitoring wire core covering layer, single reinforced nylon rope and multiple tinned copper wire are complexly twisted, and monitoring wire core covering layer is wrapped in the outer periphery of complexly twisted nylon rope and tinned copper wire.The utility model changes monitoring wire core from conventional aramid rope to NYLON 66FDY 210D / 34F BR reinforced nylon rope and through specific twisting process, so that it has better breaking force under the condition of ensuring electrical performance.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a durable heavy-duty drag cable for mining operations. Background Technology

[0002] In the dynamic mining field, conditions are harsh, and every component of the operational infrastructure must meet stringent standards of durability, reliability, and safety. Currently, domestically produced mining cables generally meet national standards, but some shortcomings still exist in terms of durability and compliance with relevant international standards.

[0003] Even when the main conductor of the Type 241.1 drag cable with intermediate monitoring core is intact, the intermediate monitoring core may still break due to its small conductor cross-section, thus shortening the overall service life of the cable. Utility Model Content

[0004] The purpose of this utility model is to provide a durable heavy-duty mining drag cable, which includes an outer sheath, a reinforcing layer, an inner sheath, and a cable assembly arranged sequentially from the outside to the inside.

[0005] The cable is supported inside the inner sheath by filler strips and includes main core, ground core and monitoring core. The main core and ground core are alternately arranged and wrapped around the outer periphery of the filler strips, while the monitoring core is located inside the filler strips.

[0006] Furthermore, the filler strip is a saddle-shaped filler strip, which is extruded from a semi-conductive neoprene rubber compound. The outer periphery of the saddle-shaped filler strip is provided with multiple saddle-shaped support arcs. The main core and the ground core are sequentially wound around the inner surface of the multiple saddle-shaped support arcs and fixed inside the inner sheath by the saddle-shaped filler strip.

[0007] Furthermore, the monitoring core includes a single strand of reinforced nylon rope made of specific NYLON 66FDY210D / 34F BR, multiple strands of tinned copper wire, and a monitoring core cover layer. The single strand of reinforced nylon rope and multiple strands of tinned copper wire are re-twisted using a retractable twisting device. The monitoring core cover layer is wrapped around the re-twisted nylon rope and tinned copper wire. The monitoring core cover layer is made of extruded ethylene propylene rubber.

[0008] Furthermore, the main core includes a shielding layer, an insulation layer disposed inside the shielding layer, and a conductor disposed inside the insulation layer. The shielding layer is a semi-conductive insulating shielding layer that matches the insulation layer. The insulation layer is an extruded 90°C ethylene propylene rubber insulation layer that meets the standards. The conductor is a multi-stranded tinned copper wire conductor, and the outer periphery of the conductor is also wrapped with polyester non-woven fabric.

[0009] Furthermore, the ground core includes a conductor and a polyester nonwoven fabric arranged in the same manner as the main conductor. The outer periphery of the polyester nonwoven fabric is wrapped with a ground core covering layer, which is a covering layer made of extruded semi-conductive neoprene rubber compound.

[0010] Furthermore, both the inner sheath and the filler strip are extruded from semi-conductive neoprene rubber material. The thickness of the inner sheath needs to be strictly controlled, and the filler strip is a saddle-shaped filler strip with a ridge thickness of not less than 2.5 mm.

[0011] Furthermore, the reinforcing layer is woven from multiple wefts using a braiding machine with an appropriate number of spindles according to the outer diameter, with each weft consisting of one strand of 1500D aramid yarn without twisting.

[0012] Furthermore, the outer protective layer is a heavy-duty neoprene extruded outer protective layer.

[0013] Compared with the prior art, the beneficial effects of this utility model are mainly reflected in:

[0014] 1. This utility model uses a saddle-shaped filler strip to house the monitoring wire core, and based on the saddle-shaped filler strip, the main wire core and the ground core are twisted together through a specific twisting process and the monitoring wire core is reinforced with a rope, so that the cable has better tensile strength and service life.

[0015] 2. The cable of this utility model uses a heavy-duty reinforced braided fixed combination type custom neoprene sheath, which increases its wear resistance and oil resistance during use. Attached Figure Description

[0016] Figure 1 This is a diagram showing the internal structure of a durable heavy-duty mining drag cable according to this utility model. Detailed Implementation

[0017] The present invention will now be described in more detail with reference to the schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention as described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0018] like Figure 1 As shown, a durable heavy-duty towing cable for mining operations includes a main conductor, a monitoring conductor, a ground conductor, a filler strip 8, an inner sheath 9, a reinforcing layer 10, and an outer sheath 11. The monitoring conductors are located inside the filler strip 8, and three main conductors and three monitoring conductors are alternately wound around the outer periphery of the filler strip 8 to form a cable. The inner sheath 9 wraps around the cable, the reinforcing layer 10 wraps around the inner sheath 9, and the outer sheath 11 wraps around the reinforcing layer 10.

[0019] Main conductor: Main conductor 1 + polyester non-woven fabric + insulation layer 2 + semi-conductive insulation shielding layer 3

[0020] The main conductor 1 is made of tin-plated copper wire stranded conductor and wrapped with polyester non-woven fabric on the outer layer to prevent the copper wire from oxidizing and blackening due to vulcanization and embedding. The insulation layer 2 is extruded 90℃ ethylene propylene rubber EPR (R-EP-90) conforming to the standard. The shielding layer 3 is extruded semi-conductive rubber mixture that matches the insulation layer.

[0021] The main conductor 1 uses tinned copper wire and ethylene propylene rubber insulation, which provides greater flexibility for the cable in harsh mining environments and reduces the risk of damage during movement.

[0022] Earth Core: Earth Core Conductor 4 + Polyester Non-woven Fabric + Earth Core Covering Layer 5

[0023] The ground core conductor 4 is configured the same as the polyester nonwoven fabric and the main wire core. The ground core covering layer 5 is an extruded semi-conductive neoprene rubber compound covering layer.

[0024] Surveillance wire core: Surveillance wire core conductor (tinned copper conductor + reinforced nylon rope) + surveillance wire core covering layer

[0025] The monitoring conductor 6 uses a specific NYLON 66FDY 210D / 34F BR nylon reinforcing rope; it is formed by re-twisting a single reinforcing nylon rope with multiple strands of tinned copper wire using a rewinding device and a tube stranding machine, adjusting the pitch ratio according to the cross-section of the monitoring conductor. The monitoring conductor cover 7 is an extruded ethylene propylene rubber cover layer. The monitoring conductor 6 has been changed from conventional aramid rope to NYLON 66FDY 210D / 34F BR nylon reinforcing rope and a specific stranding process, which ensures better tensile strength while maintaining electrical performance.

[0026] Filler bar 8

[0027] The filler strip 8 is specifically a saddle-shaped semi-conductive neoprene filler strip with a ridge thickness of not less than 2.5mm. The filler strip has six saddle-shaped support arcs on its outer periphery. The three ground cores and three main wire cores are alternately wrapped around the six saddle-shaped support arcs of the filler strip. This can not only support the multiple ground cores and main wire cores, but also ensure the roundness and symmetry of the entire cable while protecting the monitoring wire core from compression.

[0028] Inner sheath 9

[0029] The inner sheath 9 is extruded from a semi-conductive chloroprene rubber compound using an extrusion method. According to standard requirements, the thickness of the inner sheath 9 needs to be strictly controlled.

[0030] Reinforcement layer 10

[0031] It is woven from multiple slivers using a braiding machine with an appropriate number of spindles according to the outer diameter. Each sliver is composed of a single strand of 1500D aramid yarn without twisting.

[0032] Outer protective layer 11

[0033] The outer protective layer 11 is specifically made of extruded heavy-duty neoprene rubber PCP.

[0034] The combination of inner and outer sheaths (layers) in this invention acts as a protective barrier, protecting the conductor from mechanical damage and environmental hazards, and improving the service life of the cable in mining environments.

[0035] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A heavy-duty mining service trailing cable, characterized in that, It includes an outer sheath, a reinforcing layer inside the outer sheath, an inner sheath inside the reinforcing layer, and a cable wrapped in the inner sheath; The cable is supported inside the inner sheath by a filler strip and includes a main core, a ground core and a monitoring core. The main core and the ground core are alternately arranged and wound around the outer periphery of the filler strip, and the monitoring core is located inside the filler strip. The monitoring wire core includes a single strand of reinforced nylon rope, multiple strands of tinned copper wire, and a monitoring wire core covering layer. The single strand of reinforced nylon rope and multiple strands of tinned copper wire are twisted together, and the monitoring wire core covering layer is wrapped around the outer periphery of the twisted nylon rope and tinned copper wire.

2. The durable heavy mining duty tow cable of claim 1, wherein, The filler strip is a saddle-shaped filler strip, and the outer periphery of the saddle-shaped filler strip is provided with multiple saddle-shaped supporting arcs. The main core and the ground core are sequentially wrapped around the surface of the multiple saddle-shaped supporting arcs and fixed inside the inner sheath by the saddle-shaped filler strip.

3. The heavy duty mining service trailing cable of claim 1, wherein, The main core includes a shielding layer, an insulating layer disposed inside the shielding layer, and a conductor disposed inside the insulating layer. The shielding layer is a semi-conductive insulating shielding layer that matches the insulating layer. The insulating layer is an ethylene propylene rubber insulating layer. The conductor is a multi-stranded tinned copper wire conductor. The outer periphery of the conductor is also wrapped with polyester non-woven fabric.

4. The heavy duty mining service drag cable of claim 1, wherein, The ground core includes a conductor and a polyester nonwoven fabric arranged in the same manner as the main conductor, and the outer periphery of the polyester nonwoven fabric is covered with a ground core covering layer.

5. The durable heavy mining duty tow cable of claim 4, wherein, The core cover layer is a cover layer made of extruded semi-conductive chloroprene rubber compound.

6. The heavy duty mining service drag cable of claim 1, wherein, The monitoring wire core cover is made of extruded ethylene propylene rubber.

7. The heavy duty mining service drag cable of claim 1, wherein, The inner sheath and filler strip are both made of semi-conductive neoprene rubber material through extrusion.

8. The heavy duty mining service drag cable of claim 1, wherein, The reinforcing layer comprises multiple wefts for weaving, each weft consisting of multiple strands of 1500D aramid yarn.

9. The heavy duty mining service drag cable of claim 1, wherein, The outer protective layer is a heavy-duty neoprene extruded outer protective layer.

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