CN218585668U

CN218585668U - Novel tensile and torsion-resistant optical fiber composite cable for shuttle car

Info

Publication number: CN218585668U
Application number: CN202221662232.XU
Authority: CN
Inventors: 钱章兴; 王兵兵
Original assignee: Shanghai Lanhao Electric Power Co ltd
Current assignee: Shanghai Lanhao Electric Power Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-03-07
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a novel tensile is able to bear or endure to turn round compound shuttle of optic fibre and is used cable, include: the cable comprises a cable core and a protective layer extruded outside the cable core, wherein the cable core is formed by twisting a central tensile part, power lines wound around the central tensile part, ground wires in gaps among the power lines and an optical cable; the central tensile member is formed by a central thick steel wire and a high-strength rubber layer extruded outside the thick steel wire, and the protective layer is outwards sequentially included by the cable core: the low-smoke halogen-free polyurethane inner sheath, the tensile anti-torsion reinforced layer and the low-smoke halogen-free polyurethane outer sheath are arranged on the outer surface of the outer sheath; the tensile and anti-torsion reinforcing layer is formed by longitudinally dragging and weaving aramid fibers. The utility model discloses have better tensile effect, the stretching resistance reaches 2~3 times of ordinary cable, adopts little bundle twist pitch ratio to make the cable have better resistant crooked effect simultaneously.

Description

Novel tensile and torsion-resistant optical fiber composite cable for shuttle car

Technical Field

The utility model relates to a cable field especially relates to a novel tensile is able to bear or endure to turn round compound shuttle of optic fibre cable for car.

Background

In the mining industry, an engineering vehicle called shuttle car is specially used for transporting ores excavated by a development machine; the shuttle car and the heading machine are connected by a flexible cable with a small cross section, usually 16 or 25mm2, which is called a shuttle car cable. Because the cable needs to be wound on a small-diameter winding drum in the shuttle car in a reciprocating mode, the shuttle car cable can be frequently subjected to tension, torsion, scraping and other stresses, and the service life of the shuttle car cable is usually only one week or two weeks, and is better than that of the shuttle car cable by only one month or two months.

With the development of the modern mining industry, fewer and fewer workers work on the working face, and frequent cable replacement can consume a large amount of manpower and financial resources, thereby seriously restricting the ore mining efficiency. With the advance of the work of intelligent mining working faces, a high-performance shuttle car cable integrating tensile strength, torsion resistance, wear resistance and optical communication is urgently needed to be designed and manufactured by cable enterprises.

The prior art is as follows: the cable is characterized in that the cable is provided with a 201710514888.4 patent name, and a low-smoke zero-halogen shuttle car cable for coal mines, wherein the tensile element is absent in the cable, so that the overall tensile resistance of the cable does not meet the use requirement, and meanwhile, the sheath is made of ethylene propylene diene monomer, so that the strength, the tear resistance and the wear resistance of the cable cannot meet the use requirement under severe working conditions; patent 201510274521.0 a wire rope strenghthened type trouble self feedback shuttle car cable, its power line adopts metal braid shielding structure, sets up wire rope in conductor center simultaneously, because wire rope breaks easily after the bending repeatedly, can impale the insulating cable short circuit that leads to from inside to the metal shielding layer also breaks the silk and pricks into the insulation easily, and cable security performance obtains effectively the guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, according to the service environment of shuttle car cable, the not enough of the current product existence of analysis provides a reciprocal high performance cable who receive and releases the operation on the minor diameter reel, in mining field, is applied to the shuttle car usually, through reasonable cable structural design, gives the shuttle car cable and has good tensile, wear-resisting, antitorque, resistant crooked and optical communication function, satisfies the operation requirement that the working face was excavated to modernized intelligence.

In order to achieve the purpose of the invention, the utility model adopts the following technical scheme: a novel tensile and torsion-resistant optical fiber composite cable for shuttle cars comprises: the cable comprises a cable core and a protective layer extruded outside the cable core, wherein the cable core is formed by twisting a central tensile part, power lines wound around the central tensile part, ground wires in gaps among the power lines and an optical cable; the central tensile piece comprises central thick steel wire and the high-strength rubber layer of crowded package outside thick steel wire, and the inoxidizing coating outwards includes in proper order by the cable core: the low-smoke halogen-free polyurethane anti-torsion composite pipe comprises a low-smoke halogen-free polyurethane inner sheath, a tensile anti-torsion reinforcing layer and a low-smoke halogen-free polyurethane outer sheath; the tensile and anti-torsion reinforcing layer is formed by longitudinally dragging and weaving aramid fibers.

Furthermore, the power line consists of a power line conductor, a power line insulating layer and a power line insulating shielding layer; the power line conductor is a soft conductor, the strand pitch diameter ratio of the soft conductor is less than 15, the power line insulating layer is formed by extruding high-performance ethylene propylene rubber, the breakdown strength of the power line conductor reaches 18kV/mm, and the power line insulating shielding layer is a non-metal shielding layer.

Further, the ground wire is composed of a ground wire conductor and a ground wire semi-conducting layer; the ground conductor is a soft conductor, and the bundle twist pitch diameter ratio of the conductor is less than 15.

Further, the optical cable is composed of a plurality of optical fiber bundle tubes and an optical fiber protective layer arranged outside the optical fiber bundle tubes.

Furthermore, the optical fiber bundle tube in the optical cable is provided with 6 optical fiber cores, and the 6 optical fiber cores are formed by stranding a 1+6 structure.

Further, the optical fiber core in the optical fiber bundle tube is a single mode optical fiber or a multimode optical fiber.

Furthermore, the inner sheath is a sheath made of polyurethane material, the strength is more than 30MPa, the elongation is more than 300%, the tear resistance is more than 20N/mm, and the abrasion loss is less than 10mm ³ 。

Furthermore, the tensile anti-torsion reinforcing layer is formed by combining two groups of aramid fibers, wherein one group of aramid fibers are woven in a small-angle bidirectional weaving mode, the number of the woven ingots is 16 or 36, half of the number of the woven ingots is left and right, the weaving angle is smaller than 45 degrees for each ingot at 3000D, and the torsion resistance of the tensile anti-torsion reinforcing layer is larger than 9000N; the other group adopts a longitudinal dragging mode, each group has 6000D and 10 groups in total, and the longitudinal dragging is directly in the aramid fiber woven layer in weaving and is closely attached to the cable inner sheath in parallel with the axial direction of the cable.

Further, the outer sheath is made of polyurethane material, the strength is more than 30MPa, the elongation is more than 300%, the tear resistance is more than 20N/mm, and the abrasion loss is less than 10mm ³ 。

Furthermore, the low-smoke halogen-free polyurethane inner sheath, the tensile anti-torsion reinforced layer and the low-smoke halogen-free polyurethane outer sheath in the protective layer are of an integrated structure.

Compared with the prior art, the rubber jacketed flexible cable for the photoelectric composite communication, which adopts the technical scheme, has the following beneficial effects: the cable has better tensile effect, the tensile resistance reaches 2~3 times of that of a common cable, and meanwhile, the cable has better bending resistance effect by adopting a small bundle twist ratio, the cable is bent for more than 2 ten thousand times without breaking the core, the service life of the cable exceeds 12 months, the cable has very good cost performance, and higher economic benefit is created for customers; and simultaneously, the utility model discloses a shuttle car cable increases the optical communication unit in the cable core for the shuttle car cable has possessed the data transmission function, accords with the requirement of modernized unmanned on duty wisdom mine construction, possesses good application prospect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

reference numerals: 1. a central tensile member; 11. the thick steel wire is extruded outside the thick steel wire; 12. a high strength rubber layer; 2. a power line; 21. a power line conductor; 22. a power line insulating layer; 23. a power line insulation shielding layer; 3. a ground wire; 31. a ground conductor; 32. a ground semiconducting layer; 4. an optical cable; 41. a fiber optic bundle tube; 42. a fiber optic protective layer; 5. a low-smoke halogen-free polyurethane inner sheath; 6. a tensile and anti-torsion reinforcing layer; 7. and a low-smoke halogen-free polyurethane outer sheath.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, a novel tensile and torsion-resistant optical fiber composite cable for shuttle cars comprises: the cable comprises a cable core and a protective layer extruded outside the cable core, wherein the cable core is formed by twisting a central tensile member 1, power lines 2 surrounding the central tensile member 1, a ground wire 3 in a gap between the power lines 2 and an optical cable 4; the inoxidizing coating outwards includes in proper order by the cable core: the low-smoke halogen-free polyurethane anti-torsion composite material comprises a low-smoke halogen-free polyurethane inner sheath 5, a tensile anti-torsion reinforced layer 6 and a low-smoke halogen-free polyurethane outer sheath 7; wherein, the tensile and anti-torsion reinforced layer 6 is formed by longitudinally dragging and weaving aramid fibers to form the tensile and anti-torsion reinforced layer 6.

In the example, the central tensile member 1 is composed of a central thick steel wire and a high-strength rubber layer 11 extruded outside the thick steel wire 12, and traditionally, aramid fiber or a steel wire rope is used as the tensile member, but the aramid fiber is easily worn and loses tensile capability after the cable is repeatedly bent and used, and the steel wire rope is broken due to frequent bending and stretching, and broken thin steel wires and the thin steel wires are easily insulated by piercing the power line 2, so that the cable is grounded, and potential safety hazards are brought; by adopting the thick steel wire and extruding rubber outside the steel wire, the serious problems of wire breakage of the steel wire and core breakage of aramid fiber are avoided.

In the embodiment, the diameter of the thick steel wire is more than or equal to 2.0mm, the tensile resistance of the thick steel wire is more than 7500N, good tensile resistance can be kept in the whole using period process of the cable, and the service life of the cable is prolonged.

Further in this example, the power line 2 is composed of a power line conductor 21, a power line insulating layer 22 and a power line insulating shielding layer 23; the power line conductor 21 adopts 5 or 6 types of soft conductors specified in GB 3956, the strand pitch diameter ratio of the soft conductors is less than 15, so that the flexibility of the cable is ensured, the power line insulating layer 22 is formed by extruding high-performance ethylene propylene rubber, the breakdown strength of the power line insulating layer reaches 18kV/mm, and the power line insulating shielding layer 23 is a non-metal shielding layer; adopt non-metallic shield material to replace traditional metallic shield material, except that the potential safety hazard that metallic shield brought under satisfying anti-interference prerequisite, improve cable result of use.

Further in this example, the ground wire 3 is composed of a ground wire conductor 31, a ground wire semiconductive layer 32; the ground conductor 31 adopts a

Claims

1. A novel tensile and torsion-resistant optical fiber composite cable for shuttle cars comprises: the cable core and crowded inoxidizing coating of package in the cable core outside, its characterized in that: the cable core is formed by twisting a central tensile part, power lines surrounding the periphery of the central tensile part, ground wires in gaps among the power lines and an optical cable; the central tensile member is formed by a central thick steel wire and a high-strength rubber layer extruded outside the thick steel wire, and the protective layer is outwards sequentially included by the cable core: the low-smoke halogen-free polyurethane inner sheath, the tensile anti-torsion reinforced layer and the low-smoke halogen-free polyurethane outer sheath are arranged on the outer surface of the outer sheath; the tensile and anti-torsion reinforcing layer is formed by longitudinally dragging and weaving aramid fibers.

2. The novel tensile and torsion-resistant optical fiber composite shuttle car cable according to claim 1, wherein: the power line consists of a power line conductor, a power line insulating layer and a power line insulating shielding layer; the power line conductor is a soft conductor, the strand pitch diameter ratio of the soft conductor is less than 15, the power line insulating layer is formed by extruding high-performance ethylene propylene rubber, the breakdown strength of the power line conductor reaches 18kV/mm, and the power line insulating shielding layer is a non-metal shielding layer.

3. The novel tensile and torsion-resistant optical fiber composite shuttle car cable according to claim 1, wherein: the ground wire consists of a ground wire conductor and a ground wire semi-conducting layer; the ground wire conductor is a flexible conductor, and the twisting pitch diameter ratio of the conductor bundles is smaller than 15.

4. The novel tensile and torsion-resistant optical fiber composite cable for the shuttle car according to claim 1, wherein: the optical cable is composed of a plurality of optical fiber bundle tubes and an optical fiber protective layer arranged outside the optical fiber bundle tubes.

5. The novel tensile and torsion-resistant optical fiber composite cable for shuttle cars as claimed in claim 4, wherein: the optical fiber bundle tube in the optical cable is provided with 6 optical fiber cores which are formed by twisting 1+6 structures, and the center of the optical fiber bundle tube is a tensile piece.

6. The novel tensile and torsion-resistant optical fiber composite cable for shuttle cars as claimed in claim 4, wherein: the optical fiber core in the optical fiber bundle tube is a single mode optical fiber or a multimode optical fiber.

7. The novel tensile and torsion-resistant optical fiber composite cable for the shuttle car according to claim 1, wherein: the inner sheath is made of polyurethane material, and has strength greater than 30MPa, elongation greater than 300%, tear resistance greater than 20N/mm, and abrasion loss less than 10mm ³ 。

8. The novel tensile and torsion-resistant optical fiber composite cable for the shuttle car according to claim 1, wherein: the tensile anti-torsion reinforcing layer is formed by combining two groups of aramid fibers, wherein one group of aramid fibers adopts a small-angle bidirectional weaving mode to weave 16 or 36 spindles, the number of the spindles is half of the number of the spindles in the left-right direction, each spindle is 3000D, the weaving angle is smaller than 45 degrees, and the torsion resistance is larger than 9000N; the other group adopts a longitudinal dragging mode, each 6000D is 10, and the other groups are directly longitudinally dragged in the aramid fiber woven layer in the weaving process and are closely attached to the cable inner sheath in parallel with the axial direction of the cable.

9. The novel tensile and torsion-resistant optical fiber composite cable for the shuttle car according to claim 1, wherein: the outer sheath is made of polyurethane material, the strength is more than 30MPa, the elongation is more than 300%, the tear resistance is more than 20N/mm, and the abrasion loss is less than 10mm ³ 。

10. The novel tensile and torsion-resistant optical fiber composite shuttle car cable according to claim 1, wherein: the low-smoke halogen-free polyurethane inner sheath, the tensile anti-torsion reinforcing layer and the low-smoke halogen-free polyurethane outer sheath in the protective layer are of an integrated structure.