Mining optical fiber composite flame-retardant flexible cable

Abstract

The utility model discloses a mining optical fiber composite flame-retardant flexible cable, relates to the technical field of mining cables, and solves the problems that a stainless steel sheath is directly arranged on the outer side of a cable body of some mining cables in order to protect the cables, so that the weight of the cables is increased, and the service life of the cables is prolonged. The stainless steel cable comprises a cable body and a protective layer which is arranged on the outer side of the cable body in a sleeving manner, and the protective layer is arranged on the outer side of the cable body in a sleeving manner. The outer side of the protective layer is sleeved with a threaded armored 4B sleeve, the outer side of the threaded armored 4B sleeve is sleeved with a connecting layer, the outer side of the connecting layer is provided with a filling layer, the outer side of the filling layer is provided with a reinforcing layer, the outer side of the reinforcing layer is sleeved with a heat insulation layer, and the outer side of the heat insulation layer is sleeved with an outer ring. According to the utility model, the wear resistance and tensile property of the cable body are realized through the outer ring when the cable body is used.

Description

Technical Field

[0001] The utility model relates to the technical field of mining cables, in particular to a mining optical fiber composite flame-retardant soft cable. Background Art

[0002] Mining cable is the abbreviation of coal mine cable. It is a special cable mainly used for power transmission and control in underground mines or mining equipment. Mining cable is mainly divided into three categories: one is mobile cable, one is power cable and the other is communication cable.

[0003] The utility model of China is CN203826114U, which discloses a multifunctional intrinsically safe cable for mining. The multifunctional intrinsically safe cable for mining includes a stainless steel central channel tube and is wrapped with a first fire-resistant layer and an insulating layer. The outer side of the insulating layer is provided with a back-twisted control cable, a data signal cable, an optical fiber cable and a plurality of power cables. The outer side of the back-twisted control cable, the data signal cable, the optical fiber cable and the power cable is wrapped with a second fire-resistant layer. The second fire-resistant layer and the back-twisted control cable, the data signal cable, the optical fiber cable and the power cable are filled with a water-blocking filler. The surface of the second fire-resistant layer is provided with a stainless steel sheath. The beneficial effects of the utility model are: all cables in the mine are integrated into one, the overall protection is small in size; the stainless steel central channel tube and the outer stainless steel sheath are designed to monitor the indicators in the well and isolate the cable from the underground environment, which is effective in explosion prevention.

[0004] There are at least the following problems in this technology. In the process of using the multifunctional intrinsically safe cable for mining, the stainless steel sheath is directly set on the outside of the cable body, which not only increases the weight of the cable itself, but also causes the connection between the cable body and the stainless steel sheath to be easily burned due to the occurrence of fire because of the excellent thermal conductivity of the stainless steel itself. Therefore, a mine-use optical fiber composite flame-retardant soft cable is now proposed. Utility Model Content

[0005] In order to improve the problem that some mining cables are provided with a stainless steel sheath directly on the outside of the cable body in order to protect the cable itself, which not only increases the weight of the cable itself, but also causes the connection between the cable body and the stainless steel sheath to be easily burned due to the occurrence of fire due to the excellent thermal conductivity of the stainless steel itself, the utility model provides a mining optical fiber composite flame retardant soft cable.

[0006] The utility model provides a flame-retardant optical fiber composite soft cable for mining, which adopts the following technical scheme: the flame-retardant optical fiber composite soft cable for mining comprises a cable body, and a protective layer is sheathed on the outer side of the cable body;

[0007] The outer side of the protective layer is provided with a threaded armor 4B sleeve, the outer side of the threaded armor 4B sleeve is provided with a connecting layer, the outer side of the connecting layer is provided with a filling layer, the outer side of the filling layer is provided with a reinforcing layer, the outer side of the reinforcing layer is provided with a heat insulation layer, and the outer side of the heat insulation layer is provided with an outer ring;

[0008] The outer ring comprises a wear-resistant layer, a bottom end surface of the wear-resistant layer is provided with a metal braided wire, the wear-resistant layer and the metal braided wire are provided with multiple layers, and the wear-resistant layer is made of TPE thermoplastic polyurethane material.

[0009] By adopting the above technical solution, the wear resistance and tensile resistance of the cable body when in use are achieved through the multi-layer TPE thermoplastic polyurethane material inside the outer ring and the woven metal braided wire, and the metal wire braid has a thinner diameter and lighter weight than the stainless steel sheath.

[0010] As a further solution of the utility model: the protective layer includes a nylon sleeve, the nylon sleeve is arranged on the outer layer of the cable body, and a nylon strip is spirally arranged on the outer side of the nylon sleeve.

[0011] By adopting the above technical solution, the nylon sleeve and the nylon strip can achieve the effect of reducing the friction between the cable body and the threaded armored 4B sleeve, and can reduce the conductivity of the cable body when in use.

[0012] As a further solution of the utility model: the cable body includes a white core wire, a red core wire, a blue core wire and a green core wire, and the outer sides of the white core wire, the red core wire, the blue core wire and the green core wire are all wrapped with a PE mixture.

[0013] By adopting the above technical solution, the white core wire, the red core wire, the blue core wire and the green core wire are the main core wires of the optical fiber composite flame-retardant soft cable for mining.

[0014] As a further solution of the present invention: the connecting layer is composed of multiple layers of flame retardant fibers.

[0015] By adopting the above technical solution, the flame retardant fiber has good impact resistance and friction resistance, and can achieve a protective effect on the cable body.

[0016] As a further solution of the utility model: the filling layer includes multiple groups of conductive wires, and the middle of the multiple groups of conductive wires is filled with Kevlar fibers.

[0017] By adopting the above technical solutions, Kevlar fiber has the characteristics of low density, high strength, good toughness, high temperature resistance, easy processing and molding. Its strength is 5 times that of steel of the same quality, but its density is only one-fifth of that of steel.

[0018] As a further solution of the utility model: the reinforcement layer is a metal composite belt, the metal composite belt includes a plastic film, the plastic film is wrapped on the outside of the filling layer, the outside of the plastic film is wrapped with an aluminum braided protective sleeve, and the outside of the aluminum braided protective sleeve is wrapped with a rubber layer.

[0019] By adopting the above technical solution, both the metal composite tape and the threaded armored 4B sleeve can achieve good shielding performance, and the metal composite tape can prevent the cable body from getting wet, thereby improving the corrosion resistance and impact resistance of the cable body, providing mechanical protection for the use of the cable body, and ensuring its stability and reliability.

[0020] As a further solution of the utility model: the heat insulation layer includes a heat insulation protective sleeve, a cavity is opened inside the heat insulation protective sleeve, the interior of the cavity is filled with halogen-free flame retardant, and the heat insulation protective sleeve is a benzene type polyimide film material.

[0021] By adopting the above technical scheme, the isophthalic polyimide film material has outstanding high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation properties, and the halogen-free flame retardant provided can achieve a flame retardant effect during cable combustion.

[0022] In summary, the utility model has the following beneficial effects:

[0023] 1. The utility model realizes the wear resistance and tensile resistance of the cable body when in use by the multi-layer TPE thermoplastic polyurethane material and the woven metal braided wire inside the outer ring, and the metal braided wire has a thinner diameter and lighter weight than the stainless steel sheath.

[0024] 2. The utility model can achieve good shielding performance through the metal composite tape and the threaded armored 4B sleeve, and the metal composite tape can prevent the cable body from getting wet, improve the corrosion resistance and impact resistance of the cable body, provide mechanical protection for the use of the cable body, and ensure its stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 It is a structural schematic diagram of a cross section of the utility model.

[0027] Figure 3 It is a structural schematic diagram of the cross-section of the cable body, protective layer, connecting layer and filling layer of the utility model.

[0028] Figure 4 It is a structural schematic diagram of the utility model cable body, protective layer, threaded armored 4B sleeve and connecting layer.

[0029] Description of reference numerals:

[0030] 1. Cable body; 2. Protective layer; 3. Threaded armored 4B sleeve; 4. Connecting layer; 5. Filling layer; 6. Reinforcement layer; 7. Insulation layer; 8. Outer ring; 9. Wear-resistant layer; 10. Metal braided wire; 11. Nylon sleeve; 12. Nylon strip; 13. White core wire; 14. Red core wire; 15. Blue core wire; 16. Green core wire; 17. PE mixture; 18. Conductor; 19. Kevlar fiber; 20. Metal composite tape; 21. Plastic film; 22. Aluminum braided protective sleeve; 23. Rubber layer; 24. Insulation protective sleeve; 25. Cavity; 26. Halogen-free flame retardant. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] Please refer to Figure 1 , Figure 2 and Figure 4 , a flame-retardant optical fiber composite soft cable for mining, comprising a cable body 1, the outer side of the cable body 1 is sheathed with a protective layer 2;

[0033] The outer side of the protective layer 2 is provided with a threaded armor 4B sleeve 3, the outer side of the threaded armor 4B sleeve 3 is provided with a connecting layer 4, the outer side of the connecting layer 4 is provided with a filling layer 5, the outer side of the filling layer 5 is provided with a reinforcing layer 6, the outer side of the reinforcing layer 6 is provided with a heat insulating layer 7, and the outer side of the heat insulating layer 7 is provided with an outer ring 8;

[0034] The outer ring 8 includes a wear-resistant layer 9, and a metal braided wire 10 is arranged on the bottom end surface of the wear-resistant layer 9. The wear-resistant layer 9 and the metal braided wire 10 are provided with multiple layers. The wear-resistant layer 9 is a TPE thermoplastic polyurethane material. The wear resistance and tensile resistance of the cable body 1 when in use are achieved through the multiple layers of TPE thermoplastic polyurethane material inside the outer ring 8 and the braided metal braided wire 10. Compared with the stainless steel sheath, the metal braided wire 10 has a thinner diameter and a lighter weight. The protective layer 2 includes a nylon sleeve 11, and the nylon sleeve 1 1 is arranged on the outer layer of the cable body 1, and a nylon strip 12 is spirally arranged on the outside of the nylon sleeve 11. The cable body 1 includes a white core wire 13, a red core wire 14, a blue core wire 15 and a green core wire 16, and the outsides of the white core wire 13, the red core wire 14, the blue core wire 15 and the green core wire 16 are all wrapped with a PE mixture 17. The nylon sleeve 11 and the nylon strip 12 can reduce the friction between the cable body 1 and the threaded armor 4B sleeve 3, and can reduce the conductivity of the cable body 1 when in use.

[0035] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4The connecting layer 4 is composed of multiple layers of flame-retardant fibers. The flame-retardant fibers have good impact resistance and friction resistance, and can achieve a protective effect on the cable body 1. The filling layer 5 includes multiple groups of conductors 18. The middle of the multiple groups of conductors 18 is filled with Kevlar fibers 19. The Kevlar fibers 19 have low density, high strength, good toughness, high temperature resistance, easy processing and molding. Its strength is 5 times that of steel of the same quality, but its density is only one-fifth of that of steel. The reinforcement layer 6 is a metal composite belt 20. The metal composite belt 20 includes a plastic film 21. The plastic film 21 is wrapped on the outside of the filling layer 5. The outside of the plastic film 21 is wrapped with an aluminum braided protective sleeve 22. The outside of the aluminum braided protective sleeve 22 is wrapped with a rubber layer 2 3. Both the metal composite tape 20 and the threaded armor 4B sleeve 3 can achieve good shielding performance, and the metal composite tape 20 can prevent the cable body 1 from getting wet, improve the corrosion resistance and impact resistance of the cable body 1, provide mechanical protection for the use of the cable body 1, and ensure its stability and reliability. The thermal insulation layer 7 includes a thermal insulation protective sleeve 24, and a cavity 25 is opened inside the thermal insulation protective sleeve 24. The cavity 25 is filled with a halogen-free flame retardant 26, and the thermal insulation protective sleeve 24 is a benzene type polyimide film material. The benzene type polyimide film material has outstanding high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation performance, and the halogen-free flame retardant 26 can achieve a flame retardant effect when the cable burns.

[0036] The implementation principle of the utility model is as follows: first, during the use of the cable body 1, the nylon sleeve 11 and the nylon strip 12 of the protective layer 2 can reduce the friction between the cable body 1 and the threaded armor 4B sleeve 3, and can reduce the conductivity of the cable body 1 when in use. Then, the connecting layer 4 outside the protective layer 2 can increase the impact resistance and friction of the cable body 1 when in use, and achieve the protection effect on the cable body 1. Then, the Kevlar fiber 19 in the filling layer 5 has the characteristics of low density, high strength, good toughness, high temperature resistance, easy processing and molding, and its strength is 5 times that of steel of the same quality, but its density is only one-fifth of that of steel. Then the metal composite tape 20 in the reinforcement layer 6 can achieve good shielding performance, and the metal composite tape 20 can prevent the cable body 1 from moisture, improve the corrosion resistance and impact resistance of the cable body 1, provide mechanical protection for the use of the cable body 1, and ensure its stability and reliability. The isophthalic polyimide film material has outstanding high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation properties, and the halogen-free flame retardant 26 provided can achieve a flame retardant effect when the cable burns. Finally, the multi-layer TPE thermoplastic polyurethane material inside the outer ring 8 and the woven metal braided wire 10 achieve wear resistance and tensile resistance when the cable body 1 is in use, and the metal braided wire 10 has a thinner diameter and lighter weight than the stainless steel sheath.

[0037] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A flame-retardant optical fiber composite flexible cable for mining, comprising a cable body (1), characterized in that: The outer side of the cable body (1) is provided with a protective layer (2); The outer side of the protective layer (2) is provided with a threaded armor 4B sleeve (3), the outer side of the threaded armor 4B sleeve (3) is provided with a connecting layer (4), the outer side of the connecting layer (4) is provided with a filling layer (5), the outer side of the filling layer (5) is provided with a reinforcing layer (6), the outer side of the reinforcing layer (6) is provided with a heat insulating layer (7), and the outer side of the heat insulating layer (7) is provided with an outer ring (8); The outer ring (8) comprises a wear-resistant layer (9), a metal braided wire (10) is arranged on the bottom end surface of the wear-resistant layer (9), the wear-resistant layer (9) and the metal braided wire (10) are arranged in multiple layers, and the wear-resistant layer (9) is made of TPE thermoplastic polyurethane material.

2. The optical fiber composite flame-retardant flexible cable for mining according to claim 1, characterized in that: The protective layer (2) comprises a nylon sleeve (11), wherein the nylon sleeve (11) is sleeved on the outer layer of the cable body (1), and a nylon strip (12) is spirally arranged on the outer side of the nylon sleeve (11).

3. The optical fiber composite flame-retardant flexible cable for mining according to claim 1, characterized in that: The cable body (1) comprises a white core wire (13), a red core wire (14), a blue core wire (15) and a green core wire (16), and the outer sides of the white core wire (13), the red core wire (14), the blue core wire (15) and the green core wire (16) are all wrapped with a PE mixture (17).

4. The optical fiber composite flame-retardant flexible cable for mining according to claim 1, characterized in that: The connecting layer (4) is composed of multiple layers of flame-retardant fibers.

5. The optical fiber composite flame-retardant flexible cable for mining according to claim 1, characterized in that: The filling layer (5) comprises a plurality of groups of conductive wires (18), wherein the middle of the plurality of groups of conductive wires (18) is filled with Kevlar fibers (19).

6. The optical fiber composite flame-retardant flexible cable for mining according to claim 1, characterized in that: The reinforcing layer (6) is a metal composite belt (20), the metal composite belt (20) comprising a plastic film (21), the plastic film (21) being wrapped around the outside of the filling layer (5), the outside of the plastic film (21) being wrapped with an aluminum braided protective sleeve (22), and the outside of the aluminum braided protective sleeve (22) being wrapped with a rubber layer (23).

7. The optical fiber composite flame-retardant flexible cable for mining according to claim 1, characterized in that: The heat insulation layer (7) comprises a heat insulation protective sleeve (24), a cavity (25) is provided inside the heat insulation protective sleeve (24), the interior of the cavity (25) is filled with a halogen-free flame retardant (26), and the heat insulation protective sleeve (24) is made of a benzene-type polyimide film material.

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