Large-current composite cable for coal mine exploratory well

Abstract

The utility model relates to a large-current composite cable for a coal mine exploratory well, and belongs to the technical field of cables. According to the technical scheme, a liquid cooling pipe (2) is arranged in the center, a plurality of power wire cores (1) are arranged on the outer side of the liquid cooling pipe (2) in the circumferential direction, a monitoring wire (5) is arranged between any two adjacent power wire cores (1), cabling is carried out, an inner sheath (3) is extruded outside the cabling wire cores, a double-layer galvanized steel wire armor (4) is woven outside the inner sheath (3), and an outer sheath (6) is extruded outside the double-layer galvanized steel wire armor (4). The beneficial effects of the utility model are that the work of the liquid cooling pipe reduces the high temperature brought by the continuous work of the cable to a low temperature, thereby enabling the current-carrying capacity of the cable to be increased, and improving the work efficiency; even if the double-layer galvanized steel wire armoring is broken in the using process, the steel wire cannot pop out to cause the blocking of the well exploring process, and the cable is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to a large current composite cable for coal mine exploration, belonging to the technical field of cables. Background Art

[0002] Commonly used mine cables are generally consumables with short working cycles. They need to be replaced after a period of use. In addition to the fact that the structure and materials themselves do not meet the requirements of long-life operation, thermal aging of the cables also has a great impact on their lifespan. How to increase the service life of cables, reduce the number of cable installations, avoid the troubles caused by frequent cable installations, and control cable costs, so that the service life of cables installed once can be extended as much as possible has become an urgent problem to be solved in this field. Utility Model Content

[0003] The utility model aims to provide a high-current composite cable for coal mine exploration, which can effectively reduce the cable temperature, increase the cable service life, avoid frequent cable installation, and solve the above-mentioned problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] A high-current composite cable for coal mine exploration comprises a power core, a liquid cooling tube, an inner sheath, a double-layer galvanized steel wire armor, a monitoring line and an outer sheath. The liquid cooling tube is arranged at a central position. A plurality of power cores are arranged along the circumferential direction on the outside of the liquid cooling tube. A monitoring line is arranged between any two adjacent power cores. The cables are cabled. An inner sheath is extruded outside the cabled core. A double-layer galvanized steel wire armor is woven outside the inner sheath. An outer sheath is extruded outside the double-layer galvanized steel wire armor.

[0006] Furthermore, the power line core is made of multiple Class 2 copper conductors twisted and compressed, and the multiple Class 2 copper conductors are extruded with XLPE insulation layers.

[0007] Furthermore, the monitoring line is made of two-core Class 2 copper conductors twisted together, and the two-core Class 2 copper conductors are extruded with a PE insulation layer.

[0008] Furthermore, the liquid cooling tube is made of thermoplastic polyester elastomer.

[0009] Furthermore, the inner sheath is a low-smoke zero-halogen inner sheath.

[0010] Furthermore, the outer sheath is a low-smoke halogen-free polyolefin outer sheath.

[0011] The positive effects of the utility model are as follows: the liquid cooling pipe reduces the high temperature caused by the continuous operation of the cable to a low temperature, thereby increasing the current carrying capacity of the cable and improving the working efficiency; even if the cable breaks during use, the steel wires in the double-layer galvanized steel wire armor will not pop out and cause obstruction in the well exploration process, thus avoiding cable damage and enhancing the cable strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] In the figure: power line core 1, liquid cooling tube 2, inner sheath 3, double-layer galvanized steel wire armor 4, monitoring line 5, outer sheath 6. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Refer to the attached Figure 1 The present embodiment provides a high-current composite cable for coal mine exploration, comprising a power core 1, a liquid cooling tube 2, an inner sheath 3, a double-layer galvanized steel wire armor 4, a monitoring line 5 and an outer sheath 6. The liquid cooling tube 2 is arranged at the center position, and five power cores 1 are arranged along the circumferential direction on the outside of the liquid cooling tube 2. The five power cores include four main cores and one ground core. A monitoring line 5 is arranged between the ground core and the adjacent main core. The cable is formed, and the inner sheath 3 is extruded outside the cable core, and the double-layer galvanized steel wire armor 4 is woven outside the inner sheath 3. The outer sheath 6 is extruded outside the double-layer galvanized steel wire armor 4.

[0016] Preferably, the power line core 1 is made of a plurality of Class 2 copper conductors twisted and compressed, and the plurality of Class 2 copper conductors are extruded with an XLPE insulation layer.

[0017] Preferably, the monitoring line 5 is made of two-core Class 2 copper conductors twisted together, and the two-core Class 2 copper conductors are extruded with a PE insulation layer. The monitoring line 5 has two cores in total, and the two cores are twisted together to form a monitoring loop. The monitoring core mainly reflects the situation underground to the camera.

[0018] Preferably, the liquid cooling tube 2 is made of thermoplastic polyester elastomer.

[0019] Preferably, the inner sheath 3 is a low-smoke zero-halogen inner sheath.

[0020] Preferably, the outer sheath 6 is a low-smoke halogen-free polyolefin outer sheath.

[0021] A liquid cooling tube 2 with a suitable diameter is placed at the center of the cable core to ensure that the power line core 1 is in contact with the liquid cooling tube 2 and arranged closely. The liquid cooling tube 2 is made of polyurethane elastomer. Its main function is to add cooling liquid to the tube during the operation of the cable, and promote the circulation of the cooling liquid through the power pump, so as to bring out the heat generated during the operation of the cable. When the cable temperature is high, the resistance will increase. By cooling the cable with the coolant, the resistance will decrease, thereby increasing the current carrying capacity of the cable and improving the working efficiency.

[0022] A layer of low-smoke halogen-free polyolefin inner sheath is extruded outside the overall cable core, and a double-layer armored high-strength galvanized steel wire is woven outside the low-smoke halogen-free polyolefin inner sheath. The steel wire strength is ≥1770Mpa, and the direction of the armored steel wire is right for the inner layer and left for the outer layer. The high-strength galvanized steel wire of the double-layer armor has better pulling force for the cables under the shaft and can be used continuously for a long time. In addition, the double-layer galvanized steel wire armor is preformed during the armoring process. Even if the wire is broken during use, the galvanized steel wire will not pop out and cause obstruction in the well exploration process. A layer of low-smoke halogen-free polyolefin outer sheath is extruded outside the double-layer galvanized steel wire armor.

[0023] The utility model combines the power line core and the monitoring line together, uses a liquid cooling tube to cool the cable and increase the current carrying capacity of the cable, and uses a preformed double-layer galvanized steel wire armor structure to increase the service life of the well exploration cable and reduce obstruction during operation. The non-metallic materials used in the cable all meet the requirements of mining cable materials.

Claims

1. A high current composite cable for coal mine exploration, characterized in that: The invention comprises a power line core (1), a liquid cooling tube (2), an inner sheath (3), a double-layer galvanized steel wire armor (4), a monitoring line (5) and an outer sheath (6), wherein the liquid cooling tube (2) is arranged at a central position, a plurality of power line cores (1) are arranged on the outer side of the liquid cooling tube (2) along the circumferential direction, a monitoring line (5) is arranged between any two adjacent power line cores (1), and the cable is formed, wherein the cable core is extruded with an inner sheath (3), a double-layer galvanized steel wire armor (4) is woven outside the inner sheath (3), and an outer sheath (6) is extruded outside the double-layer galvanized steel wire armor (4).

2. A high current composite cable for coal mine exploration according to claim 1, characterized in that: The power line core (1) is made of a plurality of Class 2 copper conductors which are twisted and compressed, and the plurality of Class 2 copper conductors are externally extruded with an XLPE insulation layer.

3. A high current composite cable for coal mine exploration according to claim 1 or 2, characterized in that: The monitoring line (5) is made of two-core Class 2 copper conductors twisted together, and the two-core Class 2 copper conductors are extruded with a PE insulation layer.

4. A high current composite cable for coal mine exploration according to claim 1 or 2, characterized in that: The liquid cooling tube (2) is made of thermoplastic polyester elastomer.

5. A high current composite cable for coal mine exploration according to claim 1 or 2, characterized in that: The inner sheath (3) is a low-smoke, halogen-free inner sheath.

6. A high current composite cable for coal mine exploration according to claim 1 or 2, characterized in that: The outer sheath (6) is a low-smoke halogen-free polyolefin outer sheath.

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