CN114898925A

CN114898925A - Mining trailing cable

Info

Publication number: CN114898925A
Application number: CN202210615004.5A
Authority: CN
Inventors: 孙前程; 徐静; 陈兴武; 谢志滨; 田麒源; 张宇鸥; 卢维娜
Original assignee: Far East Cable Co Ltd; New Far East Cable Co Ltd; Far East Composite Technology Co Ltd
Current assignee: Far East Cable Co Ltd; New Far East Cable Co Ltd; Far East Composite Technology Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-08-12

Abstract

The invention discloses a mining trailing cable which comprises a cable core, an inner sheath, a luminous layer and an outer sheath, wherein the cable core comprises three power wire cores which are mutually abutted and stacked, reinforced filling cores are arranged in central gaps of the three power wire cores in a penetrating mode, a monitoring wire core group and two grounding wire cores are filled in outer edge gaps of the three power wire cores, the inner sheath is extruded and formed outside the cable core and is abutted with the three power wire cores, the monitoring wire core group and the two grounding wire cores simultaneously, the luminous layer comprises a luminous belt wound on the surface of the inner sheath, a transparent protective belt is wound on the surface of the luminous belt, and the outer sheath is transparent and is extruded outside the luminous layer. Above-mentioned mining trailing cable has optimized the cable core structure, has improved the resistant scraping and grinding performance of cable, ensures that sinle silk is inside stable, reduces the risk of disconnected core at dragging the in-process, and cable sheath adopts bilayer structure and inside to set up the luminous body, and outer sheath printing opacity, inlayer sheath adopt red or the striking colour of orange, have effectively prevented that the cable from being rolled the destruction.

Description

Mining trailing cable

Technical Field

The invention relates to the technical field of mining cables, in particular to a mining trailing cable.

Background

At present, mine electric forklifts in China do not have special towing cables and are replaced by coal mine cables, the cables provide kinetic energy and control signals for the electric forklifts, and the cables are towed and transferred along with the electric forklifts. Because of the cable service behavior is comparatively abominable, great pulling force degree and the ore all over, the phenomenon that disconnected core of conductor and oversheath are damaged appears in the cable easily. In addition, the cable is for guaranteeing night work, and the surface adopts the reflection of light strap as night sign, and this structure not only production technology is complicated with high costs, and the surface adsorbs a large amount of dust when the cable is used outdoors in addition, and there is a large amount of sand soil mud on the reflection of light strap for a long time of blowing in the sun, causes the cable outward appearance to be close with earth's surface colour, and the cable rolls the trouble by passing vehicle easily during the electric shovel work, and repair time is longer during the trouble, causes economic loss for production.

Disclosure of Invention

Based on the above problems, the invention aims to provide a mining towing cable, which can cope with the working conditions of long-term high-temperature exposure, low temperature, scraping and grinding, bending, vehicle rolling and the like, and improve the surface identification degree while ensuring the structural reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a mining trailing cable, it includes the cable core, the inner sheath, luminescent layer and oversheath, the cable core includes that three supports each other and leans on the power sinle silk of stacking, wear to be equipped with in the central gap of three power sinle silk and strengthen the filler core, it is provided with control sinle silk group and two earth connection sinle silks to fill in the outer fringe gap of three power sinle silk, the crowded package of inner sheath is formed outside the cable core, and simultaneously with three power sinle silk, a control sinle silk group and two earth connection sinle silks support and lean on, the luminescent layer is including the light-emitting zone around locating the inner sheath surface, the surface in light-emitting zone is around having transparent boundary belt, the oversheath is the transparent body and extrudes outside the luminescent layer.

Particularly, the reinforcing filling core comprises a Kevlar twisted fiber rope, and a rubber sheath of the reinforcing core is extruded outside the Kevlar twisted fiber rope.

Particularly, the power wire core comprises a tinned soft copper conductor, a semi-conductive nylon wrapping tape is wrapped on the surface of the tinned soft copper conductor, a conductor shielding layer made of a semi-conductive material is extruded outside the semi-conductive nylon wrapping tape, an ethylene-propylene rubber insulating layer is arranged outside the conductor shielding layer, the semi-conductive nylon wrapping tape is wrapped outside the ethylene-propylene rubber insulating layer to serve as an insulating shielding layer, and a surface shielding layer formed by co-weaving of tinned copper wires and polypropylene fibers is arranged outside the insulating shielding layer.

Particularly, the conductor shielding layer and the ethylene-propylene rubber insulating layer adopt a double-layer co-extrusion structure, the nominal thickness of the conductor shielding layer is 0.7mm, and the nominal thickness of the ethylene-propylene rubber insulating layer is 4.5 mm.

Particularly, the grounding wire core is made of tin-plated soft copper wires, the bunching pitch diameter ratio of the strands is not more than 20, the pitch diameter ratio of the inner layer is not more than 16 during compound twisting, and the twisting pitch diameter ratio of the outermost layer is not more than 10.

Especially, monitoring core group is including central strengthening core and five control core and an optical cable unit around central strengthening core transposition stranding, six strand copper conductor of strand aviation enhancement steel wire transposition outward are adopted to control core's conductor, it forms to carry out the normal transposition once again, control core's conductor surface is provided with control insulation layer, control core and optical cable unit are outer around having the non-woven fabrics band, the non-woven fabrics band is provided with the enhancement layer outward, the enhancement layer is provided with the braided shielding layer outward, the braided shielding layer is outer around having double-deck polyester area.

Particularly, the light-emitting strip adopts a light-emitting diode cloth strip, and is subjected to unwounding, and the unwounding gap is not more than 150 mm.

In particular, the transparent protective tape is a single layer transparent polyester tape and is loosely wound with a nominal thickness of 0.05mm, a width of 45mm and a loose winding gap of no more than 20 mm.

In particular, the inner sheath is made of polyurethane elastomer material, and red or orange color master batch with a nominal thickness of 2.5mm is added during production.

In particular, the outer sheath is made of polyurethane elastomer material, and is transparent without adding any color master batch during production, and the nominal thickness is 3.5 mm.

In conclusion, the mining towing cable has the advantages that:

(1) the cable core structure is optimized, and a sheath material with high strength and high hardness is selected, so that the problem of scraping, grinding and damage of a cable sheath is solved, the stability of the inside of a wire core is ensured due to the higher mechanical strength of the sheath, and the risk of core breakage is reduced in the dragging process;

(2) the optical cable unit is arranged in the cable, so that the operation picture of the electric shovel car can be monitored in real time, and the moving working condition of winding and bending is met;

(3) cable sheath adopts bilayer structure and inside to set up luminous body, and outer sheath printing opacity, inlayer sheath adopt red or the striking colour of orange, and striking colour can prevent under the strong condition of light that the cable from being rolled the destruction, and luminous body is luminous under the weak condition of light, and it is more obvious to prevent rolling the effect.

Drawings

Fig. 1 is a schematic structural diagram of a mining trailing cable provided by an embodiment of the invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1, the preferred embodiment provides a mining trailing cable, which includes a cable core, an inner sheath 5, a luminescent layer 6 and an outer sheath 7.

Wherein, the cable core includes that three each other supports to lean on the power sinle silk 2 of stacking, wears to be equipped with in the central gap of three power sinle silk 2 and strengthens filling core 1, and the filling is provided with control sinle silk group 4 and two earth core 3 in the outer fringe gap of three power sinle silk 2.

The reinforcing filling core 1 adopts 1 strand of 20000D Kevlar twisted fiber ropes 11 to replace the traditional steel wire as a reinforcing core, before subsequent extrusion, the Kevlar twisted fiber ropes 11 are placed in a drying room for baking for 3-4 h, and the water vapor of the fiber ropes is evaporated to prevent the damage phenomenon of the sheath after entering a sulfur connecting pipeline.

The Kevlar twisted fiber rope 11 is externally extruded with a reinforcing core rubber sheath 12, the reinforcing core rubber sheath 12 is made of a semi-conductive material and is extruded by 65 continuous sulfur equipment, the temperature of a machine body is 85-95 ℃, the production speed is 7-10 m/min, and the air pressure is 7-9 bar.

The power wire core 2 comprises a tinned soft copper conductor 21, the strand bundle joint diameter ratio is not more than 20, the inner layer joint diameter ratio is not more than 16 during compound twisting, and the outermost layer twisting joint diameter ratio is not more than 10. The surface of the tinned soft copper conductor 21 is wrapped with a semi-conductive nylon wrapping tape 22, the semi-conductive nylon wrapping tape 22 is extruded with a conductor shielding layer 23 made of a semi-conductive material, an ethylene-propylene rubber insulating layer 24 is arranged outside the conductor shielding layer 23, particularly, the conductor shielding layer 23 and the ethylene-propylene rubber insulating layer 24 are of a double-layer co-extrusion structure, the nominal thickness of the conductor shielding layer 23 is 0.7mm, the nominal thickness of the ethylene-propylene rubber insulating layer 24 is 4.5mm, 90+120 continuous vulcanization extrusion rubber equipment is adopted for production, the machine body temperature is 75-85 ℃, the production speed is 10-14 m/min, and the air pressure is 11-11.5 bar.

The insulating layer 24 of ethylene-propylene rubber is wrapped with the insulating shielding layer 25, the insulating shielding layer 25 is formed by wrapping with a double-layer semiconductive nylon tape, the wrapping coverage rate is not lower than 20%, the design is favorable for quick repair of cable faults, the insulating shielding is not required to be stripped by hot drying, and the phenomenon of 'creepage' caused by incomplete stripping of the insulating shielding due to artificial reasons is reduced.

The surface shielding layer 26 is arranged outside the insulation shielding layer 25, the surface shielding layer 26 is formed by mixing and weaving tinned copper wires and polypropylene fibers, the polypropylene fibers of all the wire cores are added with color yarns of three colors for distinguishing, a 32-spindle weaving machine is adopted in the structure, 5 strands of 0.295 mm-bundle stranded copper wires are adopted in 16 spindles above the structure, 15 strands of stranded polypropylene fibers are adopted in 16 spindles below the structure, the weaving density is larger than or equal to 84%, and the weaving pitch is not smaller than 64.2mm at most.

The grounding wire core 3 is made of a tinned soft copper wire, the strand bundle joint diameter ratio is not more than 20, the inner layer joint diameter ratio is not more than 16 during compound twisting, and the outermost layer twisting joint diameter ratio is not more than 10.

The monitoring core set 4 includes a central reinforcing core 41 and five control cores 42 stranded to be cabled around the central reinforcing core 41 and one cable unit 44.

The central core 41 of strengthening adopts 6 thigh 1500D kevlar cellosilk, and the surface adopts chlorinated polyethylene rubber material as the sheath, and this structural design not only promotes the whole tensile properties of monitoring core group 4, prevents moreover that the extrusion because of big sinle silk leads to monitoring core group 4's deformation.

The conductor of the control wire core 42 is a tinned soft copper wire, the conductor is stranded firstly, 6 strands of copper conductors are stranded outside the middle strand of aviation reinforcing steel wire, the 7 strands of aviation reinforcing steel wire are stranded regularly again, and the tensile strength of the aviation steel wire is larger than or equal to 1800Mpa so as to increase the tensile performance of the control wire core 42.

The control insulation layer 43 is arranged on the surface of the conductor of the control wire core 42, the control insulation layer 43 is made of irradiation cross-linked polyolefin material, the nominal thickness is 0.7mm, a 30+50 plastic extruding machine is adopted, the machine body temperature is 220-245 ℃, the outer diameter of the control wire core 42 is 3.5mm, and the characteristics of round and smooth appearance, good internal sliding property, high strength and high hardness ensure that the wire core is not deformed under the winding moving working condition.

The optical cable unit 44 has the characteristics of tensile strength and bending resistance, a high-hardness non-metal material capable of resisting the temperature of 180 ℃ is used as a central tube, a Kevlar fiber reinforcing layer is woven outside the non-metal central tube, the overall tensile strength of the optical cable unit 44 is improved, the outermost layer is extruded with an insulating material for controlling the wire core 42 rubber sleeve, the nominal thickness is 0.65mm, and the outer diameter of the optical cable unit 44 is 3.5 mm.

Control sinle silk 42 and optical cable unit 44 are wrapped outward and are had non-woven fabrics band 45, and non-woven fabrics band 45 adopts thin non-woven fabrics material, and the hank and the pitch of should controlling when control sinle silk 42 and optical cable unit 44 carry out the stranding should be 14 ~ 16, prevents that too little hank and pitch from making the optical cable disconnected core, and band thickness is 0.08mm, and it is the right side to wrap the direction, and it is 20% to wrap the lid rate, and the external diameter is 10.7mm after the package.

The reinforcing layer 46 is arranged outside the non-woven fabric belting 45, the reinforcing layer 46 is made of Kevlar fiber materials, the reinforcing layer 46 is in a weaving form, the structure is woven by a 16-spindle weaving machine, 400D aramid fiber yarns are adopted for weaving, and the weaving density must be controlled to be 30% -40%.

The braided shielding layer 47 is arranged outside the reinforcing layer 46, the braided shielding layer 47 is braided by using a tinned copper wire, the structure is braided by using a 16-spindle braiding machine, the diameter of a single wire is 0.20mm, the braiding density is more than or equal to 80%, and the outer diameter of the braided layer is 11.5 mm.

Braided shield 47 is outer to have double-deck polyester tape 48 around the package, and double-deck polyester tape 48 thickness is 0.05mm, and the width is 30mm, is 25% around the package rate of taking over, and the external diameter is 11.8mm, and this structural design effectively improves the gliding nature of monitoring core group 4 in the cable is inside.

The inner sheath 5 is extruded and formed outside the cable core, and is simultaneously abutted against the three power wire cores 2, the monitoring wire core group 4 and the two grounding wire cores 3. The inner sheath 5 is made of a polyurethane elastomer material, the tensile strength of the material is larger than or equal to 25.0Mpa, the tearing strength is larger than or equal to 40.0N/mm, the Shore hardness is as high as 95A, and the material has the characteristics of excellent wear resistance, oil resistance, low temperature resistance and the like and is suitable for outdoor severe mining area environments. Specifically, a 120# plastic extruding machine is used, the material is subjected to hot drying for 3-4 hours before extrusion, red or orange color master is added when the inner sheath 5 is produced, the temperature of the body of the plastic extruding equipment is set to be 185-210 ℃, the production speed is 3-5 m/min, the nominal thickness of the inner sheath 5 is 2.5mm, and the comprehensive wire core is preliminarily fixed.

The luminous layer 6 comprises a luminous band 61 wound on the surface of the inner sheath 5, the luminous band 61 is sparsely wound by a light-emitting diode cloth belt with high brightness, low energy consumption, small volume and long service life, and the gap between the adjacent cloth belts is not more than 150 mm. The surface of the luminous band 61 is wrapped with a transparent protective band 62, the transparent protective band 62 is made of a single-layer transparent polyester band material, the nominal thickness is 0.05mm, the width is 45mm, and the wrapping gap is not larger than 20 mm. The design of the structure mainly fixes the light-emitting belt 61 and wraps the light-emitting diodes, so that the outer sheath 7 is prevented from being clamped and abraded in the extruding process and stopping the machine.

The outer sheath 7 is transparent and extruded outside the luminescent layer 6. The outer sheath 7 is made of a polyurethane elastomer material, the tensile strength of the material is larger than or equal to 25.0Mpa, the tearing strength of the material is larger than or equal to 40.0N/mm, the Shore hardness is as high as 95A, and the material has excellent characteristics of wear resistance, oil resistance, low temperature resistance and the like and is suitable for outdoor severe mining area environments. Specifically, a No. 120 plastic extruding machine is used, the material is subjected to hot baking for 3-4 hours before extrusion, any color master is forbidden to be added during production of the outer sheath 7 to ensure transparency, the temperature of a machine body of the plastic extruding equipment is set to be 185-210 ℃, the production speed is 3-5 m/min, and the nominal thickness of the outer sheath 7 is 3.5mm, so that the wire core is fastened again, the internal structure of the cable is ensured to be compact, and the phenomena of conductor core breakage, wire core deformation and the like in the dragging process are prevented.

In conclusion, the cable core structure has been optimized to foretell mining trailing cable, has improved the resistant scraping and grinding performance of cable, ensures that sinle silk is inside stable, reduces the risk of disconnected core at the in-process of dragging, and in addition, cable sheath adopts bilayer structure and inside luminous body that sets up, outer sheath printing opacity, and the striking colour of red or orange is adopted to the inlayer sheath, and striking colour can prevent under the strong circumstances of light that the cable from being rolled the destruction, and the luminous body is luminous under the weak circumstances of light, and it is more obvious to prevent rolling the effect.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the invention, which are intended to be within the scope of the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a mining trailing cable, its characterized in that, includes cable core, inner sheath, luminescent layer and oversheath, the cable core includes that three supports each other and leans on the power sinle silk of stacking, wears to be equipped with the enhancement refill in the central gap of three power sinle silk, and the filling is provided with control sinle silk group and two earth connection sinle silks in the outer fringe gap of three power sinle silk, the inner sheath crowded package shaping in outside the cable core, and support with three power sinle silk, a control sinle silk group and two earth connection sinle silks simultaneously and lean on, the luminescent layer includes around the luminescent layer of locating the inner sheath surface, the surface of luminescent layer is around having transparent boundary belt, the oversheath be transparent and extruded in outside the luminescent layer.

2. The mining trailing cable of claim 1, wherein: the reinforcing filling core comprises a Kevlar twisted fiber rope, and a reinforcing core rubber protective layer is extruded outside the Kevlar twisted fiber rope.

3. The mining trailing cable of claim 1, wherein: the power sinle silk includes the soft copper conductor of tin-plating, the surface of the soft copper conductor of tin-plating has semi-conductive nylon band around the package, the crowded package of semi-conductive nylon band has semi-conductive material's conductor shield layer, the conductor shield layer is provided with the EPT rubber insulating layer outward, the EPT rubber insulating layer has semi-conductive nylon band as insulation shielding layer around the package outward, the insulation shielding layer is provided with the surface shielding layer of thoughtlessly weaving by tin-plating copper wire and polypropylene fibre outward.

4. The mining trailing cable of claim 3, wherein: the conductor shielding layer and the ethylene-propylene rubber insulating layer are of a double-layer co-extrusion structure, the nominal thickness of the conductor shielding layer is 0.7mm, and the nominal thickness of the ethylene-propylene rubber insulating layer is 4.5 mm.

5. The mining trailing cable of claim 1, wherein: the grounding wire core is made of tin-plated soft copper wires, the strand bundle joint diameter ratio is not more than 20, the inner layer joint diameter ratio is not more than 16 during compound twisting, and the outermost layer twisting joint diameter ratio is not more than 10.

6. The mining trailing cable of claim 1, wherein: the monitoring core group is including central enhancement core and five control core and an optical cable unit around central enhancement core transposition stranding, six strand copper conductor of transposition are strengthened to one aviation in the middle of the conductor adoption of control core, and the formal transposition forms once more, and the conductor surface of control core is provided with control insulation layer, control core with optical cable unit has the non-woven fabrics band around the package outward, the non-woven fabrics band is provided with the enhancement layer outward, the enhancement layer is provided with outward and weaves the shielding layer, it has double-deck polyester area to weave the shielding layer outward around the package.

7. The mining trailing cable of claim 1, wherein: the light-emitting band adopts a light-emitting diode cloth band and is sparsely wound, and the sparsely wound gap is not more than 150 mm.

8. The mining trailing cable of claim 1, wherein: the transparent protective tape adopts a single-layer transparent polyester tape and is subjected to sparse winding, the nominal thickness is 0.05mm, the width is 45mm, and the sparse winding gap is not more than 20 mm.

9. The mining trailing cable of claim 1, wherein: the inner sheath is made of polyurethane elastomer material, red or orange color master is added during production, and the nominal thickness is 2.5 mm.

10. The mining trailing cable of claim 1, wherein: the outer sheath is made of a polyurethane elastomer material, no color master is added during production to ensure transparency, and the nominal thickness is 3.5 mm.