Communication control explosion-proof composite cable for coal mining machine

Abstract

The communication control explosion-proof composite cable is characterized by comprising a power cable unit, a control cable unit, a communication unit, a cable core assembly wrapping tape, an inner sheath, a fiber braid layer and an outer sheath, the problems of mine gas outburst, poor safety monitoring and environment detection monitoring, missing detection of electromechanical equipment and frequent coal mining and mining difficulties can be effectively solved, cable core breakage caused by frequent movement of cables is prevented, coal safety and scientific production is improved, mine accidents are reduced or eradicated, and the economic benefit is increased. Communication and control cables are integrally laid while a power cable is laid and transformed, the management and maintenance cost of cable laying can be effectively reduced, the line investment and transformation cost can be reduced, and the system can be popularized to mine fields of various scales.

Description

Technical Field

[0001] This utility model relates to the field of mining cable technology, and in particular to an explosion-proof composite cable for communication control of coal mining machines. Background Technology

[0002] Currently, to prevent gas outbursts in coal mining, coal mines are generally equipped with various ventilation and gas extraction control equipment, as well as underground monitoring equipment with signal transceiver functions for ventilation, gas extraction, and monitoring underground conditions. However, due to the need for repeated cable laying and systematic management and maintenance, investment, renovation, and maintenance costs increase. As a result, a considerable number of small coal mines, in order to save costs, have poor safety production conditions, outdated production processes, incomplete ventilation systems, inadequate gas extraction systems, and malfunctioning safety monitoring systems. Illegal and unlicensed production occurs frequently, leading to frequent accidents and causing significant economic losses and loss of life and property. Summary of the Invention

[0003] This utility model addresses the problems mentioned in the background art by providing an explosion-proof composite cable for communication and control in coal mining machines. It integrates the laying of communication and control cables while laying and upgrading power cables, which can effectively reduce the management and maintenance costs of cable laying, reduce line investment and upgrading costs, and facilitate its use in mines of all sizes, thus preventing mining accidents.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An explosion-proof composite cable for communication and control in a coal mining machine is characterized by comprising a power cable unit, a control cable unit, a communication unit, a cable core assembly wrapping tape, an inner sheath, a fiber braided layer, and an outer sheath.

[0006] The power cable unit includes three phase wires, a phase wire monitoring wire, and a ground wire. Each phase wire includes a conductor and a phase wire insulation layer. The conductor is a Class 5 tin-plated annealed soft copper conductor with a conductor diameter of 16-120mm. 2 The outer layer of the phase wire insulation layer is extruded, and the phase wire insulation layer is made of EPDM rubber insulation material. The phase wire monitoring line is composed of a monitoring wire core conductor with a semi-conductive EPDM rubber composite layer extruded on the outside. The ground wire is composed of a bare conductor with a semi-conductive layer extruded on the outside.

[0007] The control cable unit includes a cable core consisting of 7 insulated wire cores, a shielding braided layer, and a control unit sheath. The shielding braided layer is a layer of tinned copper wire wrapped around the control cable core, and the control unit sheath is a layer of high molecular weight polyethylene sheath extruded over the shielding braided layer.

[0008] In the gap between the three phase wires, the phase wire monitoring wire and the ground wire, an optical fiber unit is provided at the center of the cable core assembly. The optical fiber unit is a central loose tube type optical cable with symmetrically arranged phosphated steel wire reinforcements.

[0009] The cable core assembly wrapping tape is a non-woven fabric wrapping tape material with reinforcing ribs. It is wrapped around the cable core assembly composed of power cable unit, control cable unit and communication unit. First, the gaps between each unit are filled and rounded by the filler, and then the cable core assembly is tied tightly.

[0010] The inner sheath covers the cable core assembly wrapping tape. The inner sheath is made of chlorinated polyethylene elastomer material with an average thickness of ≥2.8mm. The inner side of the inner sheath has an adhesive layer. The adhesive layer connects the inner sheath with the wires and cable core assembly wrapping tape inside the cable core assembly to form a whole bearing structure, thereby improving the physical performance of the cable.

[0011] The fiber braided layer covers the inner sheath. The fiber braided layer is a fiber armor woven by a 36-spindle metal braiding machine. The material is aramid polymer, carbon nanotube or metal matrix composite material.

[0012] The outer sheath covers the fiber braided layer and is made of a neoprene rubber composite material. The oxygen index of the sheath material reaches 45 or higher, and it fully possesses functions such as explosion-proof, flame-retardant, and wear-resistant properties.

[0013] A further aspect of this invention is that, in order to balance the requirements of design dimensions and physical performance, the thickness of the outer sheath is 5.5mm-7.0mm.

[0014] A further aspect of this invention is that, depending on the different communication power and functional requirements, the number of fiber cores in the optical fiber unit is 2-64.

[0015] A further aspect of this invention is that, in order to adapt to the specific dimensions of the cable design while ensuring a good shielding effect, the braiding density of the shielding braid of the control cable unit is greater than or equal to 85%.

[0016] The beneficial effects of this utility model are: it can effectively avoid problems such as mine gas outbursts, inadequate safety monitoring and environmental monitoring, missed inspections of electromechanical equipment, and frequent coal mining accidents; at the same time, it can prevent cable core breakage caused by frequent cable movement, improve safe and scientific coal production, reduce or eliminate the occurrence of mine accidents; and by integrating the laying of communication and control cables while laying and upgrading power cables, it can effectively reduce the management and maintenance costs of cable laying, reduce line investment and upgrading costs, and facilitate its application in mines of all sizes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example

[0019] As shown in the figure, a communication control explosion-proof composite cable for a coal mining machine includes a power cable unit, a control cable unit, a communication unit, a cable core assembly wrapping tape 4, an inner sheath 5, a fiber braided layer 6, and an outer sheath 7.

[0020] The power cable unit includes three phase wires, a phase wire monitoring wire, and a ground wire. Each phase wire includes a conductor 11 and a phase wire insulation layer 12. The conductor 11 is a Class 5 tin-plated annealed soft copper conductor with a specification of 16-120mm. 2 The outer layer of the phase wire insulation layer 12 is extruded, and the phase wire insulation layer 12 is EPDM rubber insulation material. The phase wire monitoring line is composed of a monitoring wire core conductor 13 with a semi-conductive EPDM rubber composite layer 14 extruded on it. The ground wire is composed of a bare conductor 15 with a semi-conductive layer 16 extruded on it.

[0021] The control cable unit includes a cable core 21 consisting of 7 insulated wire cores, a shielding braided layer 22, and a control unit sheath 23. The shielding braided layer 22 is a layer of tinned copper wire wrapped around the control cable core 21. The control unit sheath 23 is a layer of high molecular weight polyethylene sheath extruded around the shielding braided layer 22.

[0022] In the gap between the phase line, the phase line monitoring line and the ground line, an optical fiber unit 3 is provided at the center of the cable core assembly. The optical fiber unit 3 is a central loose tube type optical cable with symmetrically arranged phosphated steel wire reinforcements.

[0023] The cable core assembly wrapping tape 4 is a non-woven fabric wrapping tape material with reinforcing ribs. It is wrapped around the cable core assembly composed of power cable unit, control cable unit and communication unit. First, the gaps between each unit are filled and rounded by the filler, and then the cable core assembly is tied tightly.

[0024] The inner sheath 5 covers the cable core assembly wrapping tape 4. The inner sheath 5 is made of chlorinated polyethylene elastomer material with an average thickness of ≥2.8mm. The inner side of the inner sheath 5 has an adhesive layer. The adhesive layer connects the inner sheath 5 with the wires in the cable core assembly and the cable core assembly wrapping tape 4 to form a whole bearing structure, thereby improving the physical performance of the cable.

[0025] The fiber braided layer 6 covers the inner sheath. The fiber braided layer 6 is a fiber armor woven by a 36-spindle metal braiding machine. The material is aramid polymer, carbon nanotube or metal matrix composite material.

[0026] The outer sheath 7 covers the fiber braided layer 6. The outer sheath 7 is a neoprene rubber composite material. The oxygen index of the sheath material reaches 45 or above, and it fully has functions such as explosion-proof, flame-retardant and wear-resistant.

[0027] To balance design dimensions and physical performance requirements, the outer sheath 7 has a thickness of 5.5mm-7.0mm.

[0028] Depending on the different communication power and functional requirements, the number of optical fiber cores in the optical fiber unit 3 is 2-64.

[0029] To accommodate the specific dimensions of the cable design while ensuring good shielding performance, the braided layer 22 of the control cable unit has a braiding density greater than or equal to 85%.

Claims

1. A communication control explosion-proof composite cable for a coal mining machine, characterized by The cable assembly comprises a power cable unit, a control cable unit, a communication unit, a cable assembly wrapping tape, an inner sheath, a fiber braid layer and an outer sheath. The power cable unit comprises three phase lines, a phase line monitoring line and a ground line, each of the phase lines comprises a conductor and a phase line insulation layer, the conductor is a type 5 tinned annealed soft copper conductor, the conductor specification is 16-120 mm 2 , and the outer surface is extruded with a phase line insulation layer, the phase line insulation layer is a ternary ethylene-propylene rubber insulation material, the phase line monitoring line is composed of a monitoring line core conductor and a semi-conductive ethylene-propylene rubber composite layer extruded outside the monitoring line core conductor, and the ground line is composed of a bare conductor and a semi-conductive layer extruded outside the bare conductor The control cable unit comprises a cable core composed of seven insulated wire cores, a shielding braid layer and a control unit sheath, the shielding braid layer is a layer of tinned copper wire wrapped outside the control cable core, and the control unit sheath is a layer of high molecular weight polyethylene sheath layer extruded outside the shielding braid layer. The gap between the three phase lines, the phase line monitoring line and the ground wire is provided with an optical fiber unit at the center of the cable assembly, and the optical fiber unit is a center tube type optical cable with symmetrically arranged phosphorized steel wire reinforcing elements. The cable assembly wrapping tape is a non-woven tape material with reinforcing ribs, which is wrapped around the cable assembly composed of the power cable unit, the control cable unit and the communication unit, and the gaps between the units are first filled and rounded by the filler, and then the cable assembly is tightened. The inner sheath is wrapped on the cable assembly wrapping tape, the inner sheath is a chlorinated polyethylene elastomer material with an average thickness greater than or equal to 2.8 mm, and the inner side of the inner sheath has an adhesive layer. The fiber braid layer is wrapped on the inner sheath, and the fiber braid layer is a fiber armor woven by a 36-spindle metal braiding machine, and the material is aramid polymer, carbon nanotube or metal matrix composite material.

2. The communication control explosion-proof composite cable for a coal mining machine according to claim 1, characterized in that The outer sheath is wrapped on the fiber braid layer, and the outer sheath is a chloroprene rubber mixture material.

3. The communication control and explosion-proof composite cable for a coal mining machine according to claim 1 or 2, characterized in that The thickness of the outer sheath is 5.5-7.0 mm.

4. The communication control and explosion-proof composite cable for a coal mining machine according to claim 1 or 2, characterized in that The number of optical fiber cores of the optical fiber unit is 2-64.

5. The communication control explosion-proof composite cable for a coal mining machine according to claim 3, characterized in that The number of optical fiber cores of the optical fiber unit is 2-64.

6. The communication control and explosion-proof composite cable for a coal mining machine according to claim 1 or 2 or 5, characterized in that The shielding braid layer of the control cable unit has a braid density greater than or equal to 85%.

7. The communication control explosion-proof composite cable for a coal cutter according to claim 3, characterized in that The shielding braid layer of the control cable unit has a braid density greater than or equal to 85%.

8. The communication control explosion-proof composite cable for a coal mining machine according to claim 4, characterized in that The shielding braid layer of the control cable unit has a braid density greater than or equal to 85%.

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