Underground coal mine safety power supply wiring system

Abstract

A coal mine underground safety power supply wiring system relates to a power supply wiring system. In order to solve the problem of power supply interruption caused by mechanical damage of an existing underground coal mine wiring system after an accident, the invention provides an underground coal mine safe power supply wiring system. The underground coal mine safety power supply wiring system is composed of a linear section power supply wire, a spiral section power supply wire and a core rod. When a roof fall accident or an underground local collapse accident occurs, when soil or equipment extrudes or pulls the power supply wire, the power supply wire wound on the core rod at the spiral section can be unfolded and lengthened, power supply interruption caused by mechanical damage of power supply wiring is avoided, and the safety of coal mine personnel and rapid recovery of the accident are guaranteed.

Description

Technical Field

[0001] The invention relates to a power supply wiring system. Background Art

[0002] The development of my country's economy needs to rely on coal resources, and so does the development of the coal mining industry. With the continuous development of the economy, the coal mining industry has also risen. However, with the increase in the number of coal mines, the mining depth is getting deeper and deeper, and the geological conditions in the coal mines are gradually worse. Therefore, strengthening the protection of the underground working environment and improving the operating status of the equipment are conducive to the safe production of underground workers and the smooth operation of the mine. The underground space of the coal mine is small and the environment is humid. In addition, the underground is often affected by the geological structure, which increases the possibility of leakage accidents underground. Since the working environment on the ground of the mine is relatively dry, the underground coal mine is a typical high-humidity environment. In such an environment, transformers, switches, cables and equipment often leak electricity. In view of the humid situation underground, insulation treatment can be performed on the equipment casing and around the equipment. According to relevant regulations, it is not allowed to use overhead line power supply for power supply underground, mainly because there is a large distance between the overhead line and the ground, and leakage is prone to occur in a humid environment; secondly, because the overhead line is usually laid in a relatively humid environment, there is often a phenomenon that the insulating part of the metal conductor is in contact with the ground. In summary, in the maintenance and management of the low-voltage power supply system in the mine, its potential safety hazards must be strictly controlled and inspected to ensure the safety and reliability of the power supply system. The power supply system in the coal mine should not only ensure normal power supply, but also ensure the stability and reliability of power supply.

[0003] As an important energy industry, coal mines have always received much attention for their safe production. With the development of mining technology, the depth and scale of coal mining have continued to expand, and the types and complexity of accidents have also increased. Traditional accident prevention and control measures can no longer effectively cope with current safety challenges, and there is an urgent need for accident prevention and control measures to ensure the safe production of mines. Coal mine accidents include roof fall accidents, gas accidents, fire accidents and accidents caused by mechanical equipment failures. Among them, roof fall accidents are common dangerous accidents in coal mine operations, which refer to the sudden collapse of rocks or coal seams at the top of mine tunnels or working faces, resulting in injuries to personnel underground, equipment damage, and even more serious secondary disasters. Gas is a flammable gas with methane as the main component, which is widely present in coal seams and their surrounding rocks. Gas accidents are one of the most serious and common disasters in coal mine production, which refers to the explosion or leakage of gas in mines under certain conditions, resulting in casualties of miners and damage to equipment. In these accidents, if the power supply wiring is mechanically damaged and the power supply is interrupted, it will have a significant impact on the safety of personnel and the recovery of the accident. In the prior art, there is little research on the mechanical damage of power supply lines after accidents in coal mines. Summary of the invention

[0004] In order to solve the problem of power supply interruption caused by mechanical damage to the existing underground coal mine wiring system after an accident, the present invention proposes a safe power supply wiring system for underground coal mines.

[0005] The coal mine underground safety power supply wiring system of the present invention is composed of a straight-segment power supply conductor (4), a spiral-segment power supply conductor (5) and a core rod (6); the spiral-segment power supply conductor (5) is wound on the core rod (6), and the straight-segment power supply conductor (4) and the spiral-segment power supply conductor (5) are arranged at intervals; the straight-segment power supply conductor (4) and the spiral-segment power supply conductor (5) are composed of tensile conductors; the tensile conductors are composed of a core wire (1), a lining wire (2) and an insulating layer (3); the lining wire (2) is symmetrically arranged on both sides of the core wire (1), and the insulating layer (3) is coated on the core wire (1) and the lining wire (2); the core rod (6) is made of porous elastic foam material; the conductor (5) is bonded to the core rod (6) by an adhesive; and the lining wire (2) is stainless steel.

[0006] The coal mine underground safety power supply wiring system of the present invention is composed of a straight-segment power supply conductor (4), a spiral-segment power supply conductor (5) and a core rod (6); when a roof fall accident or a local collapse accident occurs in the mine, the spiral-segment power supply conductor (5) wrapped around the core rod (6) can be unfolded and lengthened when the soil or equipment squeezes or pulls the power supply conductor, thereby avoiding power supply interruption caused by mechanical damage to the power supply wiring, and ensuring the safety of coal mine personnel and rapid recovery from the accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the structure of the safe power supply wiring system for underground coal mines in Example 1;

[0008] Figure 2 4 is a cross-sectional view of the tensile wire in Example 1. DETAILED DESCRIPTION

[0009] The technical solution of the present invention is not limited to the specific implementation modes listed below, but also includes any reasonable combination of the specific implementation modes.

[0010] Specific implementation method 1: In this implementation method, the underground safe power supply wiring system of a coal mine is composed of a straight-segment power supply conductor (4), a spiral-segment power supply conductor (5) and a core rod (6); the spiral-segment power supply conductor (5) is wound on the core rod (6), and the straight-segment power supply conductor (4) and the spiral-segment power supply conductor (5) are arranged at intervals; the straight-segment power supply conductor (4) and the spiral-segment power supply conductor (5) are composed of tensile conductors; the tensile conductors are composed of a core wire (1), a lining wire (2) and an insulating layer (3); the lining wire (2) is symmetrically arranged on both sides of the core wire (1), and the insulating layer (3) is coated on the core wire (1) and the lining wire (2); the core rod (6) is made of porous elastic foam material; the conductor (5) is bonded to the core rod (6) by an adhesive; the lining wire (2) is stainless steel.

[0011] The coal mine underground safety power supply wiring system of this embodiment is composed of a straight section power supply conductor (4), a spiral section power supply conductor (5) and a core rod (6); when a roof fall accident or a local collapse accident occurs in the mine, the soil or equipment squeezes or pulls the power supply conductor, and the spiral section power supply conductor (5) wrapped around the core rod (6) can be unfolded and lengthened, thereby avoiding power supply interruption caused by mechanical damage to the power supply wiring, and ensuring the safety of coal mine personnel and rapid recovery from the accident.

[0012] Specific implementation method 2: This implementation method is different from the specific implementation method 1 in that the diameter of the core rod (6) is 10 to 30 cm.

[0013] Specific implementation method three: This implementation method is different from specific implementation methods one or two in that: the length of the core rod (6) is 5 to 20 m.

[0014] Specific embodiment 4: This embodiment is different from any of specific embodiments 1 to 3 in that: the preparation method of the insulating layer (3) is as follows: 100g of copolymerized polypropylene, 2g of succinic anhydride and 0.025g of ethyl formate are mixed and grafted at 190°C through a twin-screw extruder to obtain a polypropylene grafted succinic anhydride material; 90g of the prepared polypropylene grafted succinic anhydride material, 20g of conductive carbon black, 20g of limestone powder, 2g of antioxidant 1010, 2g of antioxidant 1035, 0.5g of anti-copper agent 1024, and 2g of silicone masterbatch are placed in an internal mixer at 200°C for melt blending for 25 minutes.

[0015] Specific implementation mode 5: This implementation mode is different from any one of specific implementation modes 1 to 4 in that: the stainless steel is 304N stainless steel, 309 stainless steel, 309S stainless steel or 310 stainless steel.

[0016] Specific implementation method 6: This implementation method is different from any one of the specific implementation methods 1 to 5 in that: the diameter of the serif (2) is 10 to 12 mm.

[0017] Specific implementation method 7: This implementation method is different from any one of specific implementation methods 1 to 6 in that: the porous elastic foam material is foamed polyurethane, foamed rubber or foamed polyethylene.

[0018] Specific implementation eight: This implementation differs from any one of specific implementations one to seven in that the particle size of the limestone powder is 15 to 200 μm.

[0019] Example 1

[0020] The coal mine underground safety power supply wiring system of this embodiment is composed of a straight power supply conductor (4), a spiral power supply conductor (5) and a core rod (6); the diameter of the core rod (6) is 20 cm, and the length of the core rod (6) is 10 m;

[0021] The spiral section power supply wire (5) is wound on a core rod (6), and the straight section power supply wire (4) and the spiral section power supply wire (5) are arranged at intervals; the straight section power supply wire (4) and the spiral section power supply wire (5) are composed of tensile wires;

[0022] The tensile wire is composed of a core wire (1), a lining wire (2) and an insulating layer (3); the lining wire (2) is symmetrically arranged on both sides of the core wire (1), and the insulating layer (3) is coated on the core wire (1) and the lining wire (2);

[0023] The core rod (6) is foamed polyurethane;

[0024] The conductor (5) is bonded to the core rod (6) by an adhesive; the lining wire (2) is made of 304N stainless steel, and the diameter of the lining wire (2) is 10 mm.

[0025] The preparation method of the insulating layer (3) is as follows: 100g of copolymerized polypropylene, 2g of succinic anhydride and 0.025g of ethyl formate are mixed and grafted at 190°C through a twin-screw extruder to obtain a polypropylene grafted succinic anhydride material; 90g of the obtained polypropylene grafted succinic anhydride material, 20g of conductive carbon black, 20g of limestone powder with a particle size of 50μm, 2g of antioxidant 1010, 2g of antioxidant 1035, 0.5g of anti-copper agent 1024, and 2g of silicone masterbatch are placed in an internal mixer at 200°C for melting and blending for 25 minutes. The underground safe power supply wiring system of the coal mine in this embodiment is composed of a straight power supply wire (4), a spiral power supply wire (5) and a mandrel (6);

[0026] When a roof fall accident or a local collapse accident occurs underground, the power supply wire (5) wound around the core rod (6) in the spiral section can be unfolded and lengthened when the soil or equipment squeezes or pulls the power supply wire, thereby avoiding power supply interruption caused by mechanical damage to the power supply wiring, ensuring the safety of coal mine personnel and rapid recovery from the accident.

Claims

1. A safe power supply wiring system for underground coal mines, characterized by: The coal mine underground safety power supply wiring system is composed of a straight-segment power supply conductor (4), a spiral-segment power supply conductor (5) and a core rod (6); the spiral-segment power supply conductor (5) is wound on the core rod (6), and the straight-segment power supply conductor (4) and the spiral-segment power supply conductor (5) are arranged at intervals; the straight-segment power supply conductor (4) and the spiral-segment power supply conductor (5) are composed of tensile conductors; the tensile conductors are composed of a core wire (1), a lining wire (2) and an insulating layer (3); the lining wire (2) is symmetrically arranged on both sides of the core wire (1), and the insulating layer (3) is coated on the core wire (1) and the lining wire (2); the core rod (6) is made of porous elastic foam material; the conductor (5) is bonded to the core rod (6) by an adhesive; and the lining wire (2) is made of stainless steel.

2. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The core rod (6) has a diameter of 10 to 30 cm.

3. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The length of the core rod (6) is 5 to 20 m.

4. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The preparation method of the insulating layer (3) is as follows: 100g of copolymerized polypropylene, 2g of succinic anhydride and 0.025g of ethyl formate are mixed and grafted at 190°C through a twin-screw extruder to obtain a polypropylene grafted succinic anhydride material; 90g of the obtained polypropylene grafted succinic anhydride material, 20g of conductive carbon black, 20g of limestone powder, 2g of antioxidant 1010, 2g of antioxidant 1035, 0.5g of anti-copper agent 1024 and 2g of silicone masterbatch are placed in an internal mixer at 200°C for melt blending for 25 minutes.

5. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The stainless steel is 304N stainless steel, 309 stainless steel, 309S stainless steel or 310 stainless steel.

6. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The diameter of the serif (2) is 10-12 mm.

7. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The porous elastic foam material is foamed polyurethane, foamed rubber or foamed polyethylene.

8. The coal mine underground safety power supply wiring system according to claim 1, characterized in that: The particle size of the limestone powder is 15 to 200 μm.

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