A mine cable

Abstract

The utility model discloses a kind of mining cables, its key points are: including power line core, control line core, center filling, wrapping layer, inner sheath, armoring layer, shielding layer and outer sheath.Power line core has 3, control line core has 3, 3 power line core and 3 control line core are stranded into cable, center filling is formed when center is placed filler strip during stranding, wrapping isolation band forms wrapping layer after stranding into cable, and wrapping cover rate is 25% to 30%.Inner sheath is extruded on wrapping layer outer by ethylene-propylene rubber.The armoring layer is inclined to be wrapped outside the inner sheath by galvanized steel wire.The shielding layer is inclined to be wrapped outside the armoring layer by tinned copper wire, and the cross section of the inclined wrapping is not less than 35mm square.The outer sheath is extruded on the shielding layer outer by chloroprene rubber material.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically a mining cable. Background Technology

[0002] With advancements in technology and increased levels of automation, electrical control technology plays an even more prominent role in coal mine production. Due to the harsh working conditions in coal mines, higher demands are placed on the safety and reliability of cables.

[0003] Chinese patent document CN105913957B discloses a mining cable, the purpose of which is to provide a mining cable with halogen-free and low-smoke characteristics, excellent heat resistance, oil resistance, corrosion resistance, cold resistance, and aging resistance, environmentally friendly flame retardancy and fire resistance, and outstanding physical and mechanical properties. The technical means adopted is as follows: the mining cable includes a conductor, a filling layer 1 wrapped around the conductor, a 3M 8882 elastic insulating waterproof resin coating 2 applied to the filling layer 1, a Teflon tape wrapping layer 3 wrapped around the 3M 8882 elastic insulating waterproof resin coating 2, a rubber inner sheath 4 extruded around the Teflon tape wrapping layer 3, a steel wire armor layer 5 wrapped around the rubber inner sheath 4, and a rubber outer sheath 6 extruded around the steel wire armor layer 5; the conductor includes three power conductors and three control conductors; the power conductors are composed of conductors 7, and Korean Hosek Chemical HDPE extruded around conductors 7. The structure consists of a 5305E high-density polyethylene (HDPE) insulation layer 8; a control conductor composed of a silver-plated soft round copper wire conductor 9; a Korean Hosak Chemical HDPE 5305E high-density polyethylene (HDPE) insulation layer 10 extruded over the silver-plated soft round copper wire conductor 9; a copper tape shielding layer 11 wrapped around the Korean Hosak Chemical HDPE 5305E high-density polyethylene (HDPE) insulation layer 10; and a polyimide tape wrapping layer 12 wrapped around the copper tape shielding layer 11. This structure has relatively weak tensile strength and is easily affected by interference. Utility Model Content

[0004] The purpose of this invention is to provide a mining cable that is simple in structure, strong in tensile strength, and has good reliability.

[0005] The basic technical solution to achieve the purpose of this utility model is: a mining cable, the structural features of which include a power core, a control core, a center filler, a wrapping layer, an inner sheath, an armor layer, a shielding layer, and an outer sheath.

[0006] The cable consists of three power cores and three control cores, twisted together. A filler strip is placed in the center during twisting to form a central filler. After twisting, an insulating strip is wrapped around the cable to form a wrapping layer, with an overlap of 25% to 30%. The inner sheath is made of EPDM rubber extruded over the wrapping layer. The armor layer is made of galvanized steel wire obliquely wrapped over the inner sheath. The shielding layer is made of tinned copper wire obliquely wrapped over the armor layer, with an oblique cross-section of not less than 35mm². The outer sheath is made of neoprene rubber extruded over the shielding layer.

[0007] Furthermore, to improve flexibility: the three power cores have the same structure, and each has a power core conductor, a power core wrapping layer, a power core insulation layer and a power core semi-conductive layer arranged sequentially from the inside to the outside along its respective radial direction.

[0008] The power conductor core is formed by stranding and re-stretching several tin-plated copper wire bundles. The power conductor core wrapping layer is made of high-temperature resistant polyester tape wrapped around the power conductor core. The power conductor core insulation layer is made of ethylene propylene rubber and is extruded over the power conductor core wrapping layer. The power conductor core semi-conductive layer is made of a semi-conductive material extruded over the power conductor core insulation layer.

[0009] Furthermore, to improve flexibility: the three control cores have the same structure, and each has a control core conductor, a control core insulation layer, a control core shielding layer and a control core semiconducting layer arranged sequentially from the inside to the outside along its respective radial direction.

[0010] The control conductor is formed by twisting and re-twisting several bundles of tinned copper wire. The insulation layer is made of ethylene propylene rubber and is extruded over the control conductor. The shielding layer is made of tinned copper wire braid. The semi-conductive layer is made of a semi-conductive material extruded over the shielding layer.

[0011] The present invention has the following beneficial effects: (1) The mining cable of the present invention has a simple structure, with an armor layer and a shielding layer, which is conducive to improving tensile strength and reliability of use. The power core conductor is made of Class 5 copper conductor, the insulation layer and inner sheath are made of ethylene propylene rubber, and the outer sheath is made of neoprene rubber, which ensures the flexibility of the cable and facilitates dragging. (2) The steel wire of the armor layer and the tinned copper wire of the shielding layer of the mining cable of the present invention are both bundled and twisted before being loosely wound. This ensures the flexibility of the cable and increases the tensile and compressive strength of the cable, avoiding the cable deformation and core breakage caused by external pressure. It also has a good shielding effect and improves the anti-interference ability. (3) The outer sheath of the mining cable of the present invention is made of 5GM5 neoprene rubber material, which greatly improves the wear resistance and tear resistance of the cable, and is suitable for working conditions that require dragging on complex and harsh ground. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the mining cable of this utility model.

[0013] The labels in the attached diagram are:

[0014] Power core 1, power core conductor 1-1, power core wrapping layer 1-2, power core insulation layer 1-3, power core semi-conductive layer 1-4

[0015] Control core 2, control core conductor 2-1, control core insulation layer 2-2, control core shielding layer 2-3, control core semiconducting layer 2-4.

[0016] Center fill 3,

[0017] Wrapping layer 4,

[0018] Inner sheath 5,

[0019] Armor layer 6,

[0020] Shielding layer 7,

[0021] Outer sheath 8. Detailed Implementation

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. The terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model or simplifying the description, rather than indicating a specific orientation that must be present.

[0023] (Example 1)

[0024] See Figure 1 The mining cable of this utility model includes a power core 1, a control core 2, a center filler 3, a wrapping layer 4, an inner sheath 5, an armor layer 6, a shielding layer 7, and an outer sheath 8.

[0025] There are 3 power cores 1. The 3 power cores 1 have the same structure. Each of them has a power core conductor 1-1, a power core wrapping layer 1-2, a power core insulation layer 1-3 and a power core semiconducting layer 1-4 arranged in sequence from the inside to the outside along their respective radial direction.

[0026] The power conductor 1-1 is formed by twisting several tin-plated copper wire bundles together, conforming to the requirements of conductor type 5 in GB / T 3956. The power conductor wrapping layer 1-2 is made of high-temperature resistant polyester tape wrapped around the power conductor 1-1. The power conductor insulation layer 1-3 is made of ethylene propylene rubber and is extruded around the power conductor wrapping layer 1-2.

[0027] The semiconductive layer 1-4 of the power core is made of semiconductive material extruded outside the insulation layer 1-3 of the power core. In this embodiment, the semiconductive material is XBD-30.

[0028] There are 3 control cores 2. The 3 control cores 2 have the same structure. Each of them has a control core conductor 2-1, a control core insulation layer 2-2, a control core shielding layer 2-3 and a control core semiconducting layer 2-4 arranged in sequence from the inside to the outside along its own radial direction.

[0029] The control conductor 2-1 is formed by twisting and re-twisting several tin-plated copper wire bundles. The control conductor insulation layer 2-2 is made of ethylene propylene rubber and is extruded over the control conductor 2-1. The control conductor shielding layer 2-3 is made of tin-plated copper wire braided shielding, and the braided cross-section is tested, i.e., the total cross-section of all braided wires meets 1.5mm² per core. The control conductor semi-conductive layer 2-4 is made of semi-conductive material extruded over the control conductor shielding layer 2-3. In this embodiment, the semi-conductive material is of type XBD-30.

[0030] Three power cores 1 and three control cores 2 are twisted into a cable. During twisting, a filler strip is placed in the center to form a central filler 3. After twisting into a cable, an isolation strip is wrapped around it to form an isolation layer 4, with an overlap rate of 25% to 30%. In this embodiment, the isolation strip is made of double-sided coated cotton cloth.

[0031] The inner sheath 5 is made of ethylene propylene rubber extruded on the outside of the wrapping layer 4, and the ethylene propylene rubber is designated as GM1b.

[0032] The armor layer 6 is made of galvanized steel wire obliquely wrapped around the inner sheath 5. Specifically, the galvanized steel wire is first bundled and twisted together and then loosely wrapped obliquely. In this embodiment, 80-85 strands of wire are used, and each strand uses 7 0.5 steel wire bundles.

[0033] The shielding layer 7 is made of tin-plated copper wire obliquely wrapped around the armor layer 6. Specifically, the tin-plated copper wire is first bundled and twisted and then loosely wound. In this embodiment, 75 strands of wire are used, and each strand uses 7 bundles of 0.3 tin-plated copper wire. The oblique wrapping cross section is not less than 35mm².

[0034] The outer sheath 8 is made of neoprene rubber material extruded on the outside of the shielding layer 7, and the neoprene rubber is designated as 5GM5.

[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mining cable, characterized in that: It includes a power core (1), a control core (2), a center filler (3), a wrapping layer (4), an inner sheath (5), an armor layer (6), a shielding layer (7), and an outer sheath (8); There are 3 power cores (1) and 3 control cores (2). The 3 power cores (1) and 3 control cores (2) are twisted into a cable. When twisting, a filler strip is placed in the center to form a center filler (3). After twisting into a cable, an isolation strip is wrapped around to form a wrapping layer (4). The wrapping overlap rate is 25% to 30%. The inner sheath (5) is made of ethylene propylene rubber extruded on the outside of the wrapping layer (4). The armor layer (6) is made of galvanized steel wire obliquely wrapped on the outside of the inner sheath (5). The shielding layer (7) is made of tinned copper wire obliquely wrapped on the outside of the armoring layer (6). The oblique wrapping cross section is not less than 35mm². The outer sheath (8) is made of neoprene rubber extruded on the outside of the shielding layer (7).

2. The mining cable according to claim 1, characterized in that: The three power cores (1) have the same structure, and each is provided with a power core conductor (1-1), a power core wrapping layer (1-2), a power core insulation layer (1-3), and a power core semiconducting layer (1-4) in sequence from the inside to the outside along its respective radial direction. The power conductor (1-1) is formed by twisting several tin-plated copper wire bundles together; the power conductor wrapping layer (1-2) is made of high-temperature resistant polyester tape wrapped around the power conductor (1-1); the power conductor insulation layer (1-3) is made of ethylene propylene rubber and is extruded around the power conductor wrapping layer (1-2); the power conductor semi-conductive layer (1-4) is made of semi-conductive material extruded around the power conductor insulation layer (1-3).

3. The mining cable according to claim 1, characterized in that: The three control cores (2) have the same structure, and each of them is provided with a control core conductor (2-1), a control core insulation layer (2-2), a control core shielding layer (2-3) and a control core semiconducting layer (2-4) in sequence from the inside to the outside along their respective radial direction. The control conductor (2-1) is formed by twisting several tinned copper wire bundles together; the control insulation layer (2-2) is made of ethylene propylene rubber and is extruded over the control conductor (2-1); the control shielding layer (2-3) is made of tinned copper wire braided shielding; the control semiconductive layer (2-4) is made of semiconductive material and is extruded over the control shielding layer (2-3).

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