High-flame-retardant and explosion-proof control cable for coal mine

Abstract

The utility model belongs to the field of electrical equipment control cables, and particularly relates to a high-flame-retardant and explosion-proof control cable for a coal mine, which comprises a cable core, an inner sheath layer, a shielding layer and an outer sheath layer. Wherein the cable core comprises insulating core wires and fillers, each insulating core wire comprises a conductor and an insulating layer, the insulating layer is extruded and wrapped outside the insulating layer, and the fillers are arranged among the insulating core wires; the cable core is wrapped by an inner sheath layer, the inner apron layer is wrapped by a shielding layer, and the shielding layer is wrapped by an outer sheath layer. The utility model provides the high-flame-retardant and explosion-proof control cable for the coal mine, which has the performances of high flame retardance, explosion prevention, tension resistance, smashing resistance and the like, and improves the safety of operation under the mine.

Description

Technical Field

[0001] The utility model belongs to the field of control cables for electrical equipment, and particularly relates to a highly flame-retardant and explosion-proof control cable for coal mines. Background Technique

[0002] With the continuous development of mining equipment and the increasingly strict requirements for safety production, the control cable for coal mines not only needs certain electrical and mechanical properties but also requires safety. Due to the particularity of the underground coal mine environment and the harsh laying conditions, it is particularly important to improve the performance indicators and safety of the control cable for coal mines.

[0003] At present, most of the control cables for coal mines on the market only have flame-retardant properties, but cannot solve the problems of static electricity generated by electromagnetic induction, dust, etc., resulting in electric sparks, leading to underground explosions or fires. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides a highly flame-retardant and explosion-proof control cable for coal mines with properties such as high flame retardancy, explosion protection, tensile resistance, and impact resistance, which improves the safety of underground operations.

[0005] A highly flame-retardant and explosion-proof control cable for coal mines includes a cable core, an inner sheath layer, a shielding layer, and an outer sheath layer; wherein, the cable core includes insulated core wires and fillers, the insulated core wires include conductors and insulating layers, the conductors are extruded and wrapped with insulating layers, and there are fillers between the insulated core wires; the cable core is wrapped with an inner sheath layer, the inner sheath layer is wrapped with a shielding layer, and the shielding layer is wrapped with an outer sheath layer.

[0006] Further, the conductor is a single-strand oxygen-free soft copper wire.

[0007] Further, the insulating layer is made of irradiated low-density polyethylene material.

[0008] Further, the filler is flame-retardant fiberglass filaments.

[0009] Further, the material of the inner sheath layer is flame-retardant polyvinyl chloride.

[0010] Further, the shielding layer includes an aluminum film, a double-layer steel wire braided structure, and a tinned copper wire drain wire.

[0011] Further, the outer sheath layer is made of a highly flame-retardant and antistatic polyvinyl chloride material.

[0012] Advantageous Technical Effects of the Utility Model:

[0013] 1. The insulating layer is made of irradiated low-density polyethylene material, which solves the problems of insulation layer damage and gradual decrease of insulation resistance due to the long-term laying of the cable in the humid environment of the underground coal mine.

[0014] 2. The cable core is filled with flame-retardant glass fiber filaments, which not only makes the cable core more round but also further improves the flame retardancy of the cable.

[0015] 3. The inner sheath layer is made of flame-retardant polyvinyl chloride material. The inner sheath structure can fix the originally loose cable core structure. In addition, it can prevent the outer steel wire braided armor from damaging the cable core during movement and improve the overall flame retardancy of the cable.

[0016] 4. The shielding layer is a structure of aluminum film plus double-layer steel wire braiding, and is attached with tinned copper wire drain wires, which ensures that signal transmission is not interfered by external signals and guarantees the transmission quality; the high-density double-layer steel wire braiding has strong mechanical strength, which can prevent the cable from being damaged due to gnawing by harmful animals such as mice, and can prevent the cable from being damaged by hard objects such as falling stones, and can play an excellent role in anti-electricity, anti-magnetic interference, anti-tensile and anti-smashing, improving the safety and reliability of signal transmission.

[0017] 5. The outer sheath layer uses high flame-retardant and anti-static polyvinyl chloride; the oxygen index of this material is ≥35, which makes the cable have excellent flame retardant performance, and the excellent anti-static performance makes the outer surface of the cable not generate static electricity due to internal and external reasons, effectively avoiding the risk of explosion and fire caused by static electricity generated by the cable sheath. Brief Description of the Drawings

[0018] Figure 1 It is the main view of the sectional structure of the present utility model;

[0019] In the figure: 1. Filling; 2. Insulation layer; 3. Conductor; 4. Inner sheath layer; 5. Aluminum film; 6. Tinned copper wire drain wire; 7. Double-layer steel wire braiding structure; 8. Outer sheath layer. Detailed Description of the Preferred Embodiment

[0020] The following will be described in detail the specific embodiments, structures, features and functions provided according to the present utility model in conjunction with the accompanying drawings and preferred embodiments.

[0021] A high flame-retardant and explosion-proof control cable for coal mines includes a cable core, an inner sheath layer 4, a shielding layer and an outer sheath layer 8; among them, the cable core includes insulating core wires and filling 1, the insulating core wires include a conductor 2 and an insulation layer 3, an insulation layer 2 is extruded and wrapped outside the conductor 3, and there is filling 1 between the insulating core wires; the cable core is wrapped with an inner sheath layer 4, the inner sheath layer 4 is wrapped with a shielding layer, and the shielding layer is wrapped with an outer sheath layer 8.

[0022] Further, the conductor 3 is a single-strand oxygen-free soft copper wire.

[0023] Further, the insulation layer 2 uses irradiated low-density polyethylene material.

[0024] Further, the filling 1 is flame-retardant glass fiber filaments.

[0025] Furthermore, the material of the inner sheath layer 4 is flame retardant polyvinyl chloride.

[0026] Furthermore, the shielding layer includes an aluminum film 5 , a double-layer steel wire braided structure 7 and a tinned copper wire drain wire 6 .

[0027] Furthermore, the outer protective layer 8 is made of highly flame-retardant and antistatic polyvinyl chloride material.

[0028] Beneficial technical effects of this utility model:

[0029] 1. The insulation layer is made of irradiated low-density polyethylene material, which solves the problem of insulation layer damage and gradual decrease in insulation resistance due to long-term laying of cables in the humid environment of coal mines.

[0030] 2. The cable core is filled with flame-retardant glass fiber, which not only makes the cable core more round, but also further improves the flame retardancy of the cable.

[0031] 3. The inner sheath layer is made of flame-retardant polyvinyl chloride material. The inner sheath structure can fix the originally loose cable core structure. In addition, it can prevent the outer steel wire braided armor from damaging the cable core during movement, while improving the overall flame retardancy of the cable.

[0032] 4. The shielding layer is an aluminum film plus double-layer steel wire braided structure, and is attached with a tinned copper wire drainage line to ensure that signal transmission is not interfered with by external signals and to ensure transmission quality; the high-density double-layer steel wire braid has strong mechanical strength, which can prevent the cable from being damaged by the gnawing of harmful animals such as mice, and can prevent the cable from being hit by hard objects such as falling rocks. It also has excellent resistance to electrical and magnetic interference, tension and smashing, thereby improving the safety and reliability of signal transmission.

[0033] 5. The outer sheath is made of highly flame-retardant and anti-static polyvinyl chloride; the oxygen index of this material is ≥35, which makes the cable have excellent flame-retardant properties and excellent anti-static properties, so that the outer surface of the cable will not generate static electricity due to internal and external reasons, effectively avoiding the risk of explosion and fire caused by static electricity generated by the cable sheath.

[0034] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should fall within the scope of the patent coverage of the present invention.

Claims

1. A highly flame-retardant and explosion-proof control cable for coal mines, characterized in that: It includes a cable core, an inner sheath layer, a shielding layer and an outer sheath layer; wherein, the cable core includes insulated core wires and fillers, the insulated core wires include conductors and insulating layers, an insulating layer is extruded and wrapped outside the insulating layer, and there are fillers between the insulated core wires; the cable core is wrapped with an inner sheath layer, the inner sheath layer is wrapped with a shielding layer, and the shielding layer is wrapped with an outer sheath layer.

2. The high-flame-retardant and explosion-proof control cable for coal mines according to claim 1, wherein: The conductor is a single-strand oxygen-free soft copper wire.

3. A highly flame-retardant and explosion-proof control cable for coal mines according to claim 1, characterized in that: The insulating layer is made of irradiated low-density polyethylene material.

4. A highly flame-retardant and explosion-proof control cable for coal mines according to claim 1, characterized in that: The filler is flame-retardant fiberglass yarn.

5. A highly flame-retardant and explosion-proof control cable for coal mines according to claim 1, characterized in that: The material of the inner sheath layer is flame-retardant polyvinyl chloride.

6. A highly flame-retardant and explosion-proof control cable for coal mines according to claim 1, characterized in that: The shielding layer includes an aluminum film, a double-layer steel wire braided structure and a tinned copper wire drain wire.

7. A highly flame-retardant and explosion-proof control cable for coal mines according to claim 1, characterized in that: The outer sheath layer is made of a highly flame-retardant and anti-static polyvinyl chloride material.

Images