Halogen-free low-smoke mobile rubber sleeve cable for coal mine

Abstract

The utility model discloses a halogen-free low-smoke mobile rubber sleeve cable for a coal mine, which comprises a conductor, the conductor comprises a power wire core conductor and a ground wire core conductor, an elastic body is arranged between the power wire core conductor and the ground wire core conductor, a double-sided water-blocking tape is arranged on the outer side of the conductor, and the double-sided water-blocking tape is arranged on the outer side of the conductor. The outer side of the double-sided water-blocking tape is sequentially provided with an inner protective layer, an interlocking armor layer, a first flame-retardant layer, a second flame-retardant layer and an outer sheath layer; and a filler layer is filled between the power wire core conductor and the ground wire core conductor in the double-sided water-blocking tape. By adopting the cable provided by the utility model, the cable not only meets the power transmission, but also has the characteristics of flame retardance, no halogen, low smoke and no toxicity, the wear resistance of the cable is improved, the cable is prevented from being damaged due to friction, the service life of the cable is prolonged, the use requirements of the cable for the coal mine are met, and the cable is strong in practicability, simple in overall structure and easy to popularize. The design is reasonable, and popularization and use are worthy.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically a halogen-free, low-smoke mobile rubber-sheathed cable for coal mines. Background Technology

[0002] Coal is the world's richest fossil resource, and my country has abundant coal reserves. Coal mining machines are one of the key pieces of equipment for realizing the mechanization and modernization of coal mine production. They can reduce manual labor, improve safety, and achieve high output, high efficiency, and low consumption. With the continuous development of my country's coal industry, the development of coal mine cables has also been rapid. Since coal mining is mainly located underground, and the underground geological conditions are harsh, the working space is limited, and the conditions are relatively complex, coal mining cannot be separated from the supply of power facilities. The sheath material of commonly used mining power cables is mostly polyvinyl chloride (PVC), which is a halogen-containing material. In the event of a fire, it will release a large amount of halogen acid gas and dense smoke. Halogen acid gas can cause poisoning, and dense smoke can cause suffocation and obstruct vision, which is detrimental to the safety of personnel on site.

[0003] Current coal mine cables can no longer meet the demands of complex geological conditions, particularly the impact of underground gravel and the crushing effect of coal mining equipment, leading to increasingly stringent performance requirements for cables. A search revealed two patent documents: CN217562270U, ​​which discloses a halogen-free, low-smoke, flame-retardant power cable for coal mines, and CN210378588U, which discloses a 10kV halogen-free, low-smoke, flame-retardant power cable for coal mines. These two patents offer different solutions to meet the requirements of coal mine applications. With the continuous development of my country's coal industry, the demand for cables is increasing accordingly. To enhance competitiveness, adapt to market demands, and increase market share, companies are seeking to develop cables that differ from existing technologies to meet these requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the problems existing in the background technology, thereby providing a mining cable with a simple structure and stable performance. Using this cable, while meeting the characteristics of halogen-free, low smoke and non-toxic, its wear resistance can also be enhanced to avoid damage to the cable due to friction, thus meeting the usage requirements of cables for coal mines. Specifically, it is a halogen-free low smoke mobile rubber-sheathed cable for coal mines.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a halogen-free low-smoke mobile rubber-sheathed cable for coal mines, comprising a conductor, the conductor including a power core conductor and a ground core conductor, an elastic body provided between the power core conductor and the ground core conductor, a double-sided water-blocking strip provided on the outside of the conductor, and an inner sheath, an interlocking armor layer, a first flame-retardant layer, a second flame-retardant layer and an outer sheath layer sequentially provided on the outside of the double-sided water-blocking strip; a filler layer is also filled between the power core conductor and the ground core conductor inside the double-sided water-blocking strip.

[0006] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, there are three power conductor cores and one ground conductor core. The power conductor core and the ground conductor core are arranged in an externally tangential state on the outside of the elastic body. The power conductor core includes a power copper core, and a power insulation layer and a semi-conductive shielding layer disposed outside the power copper core. The ground conductor core includes a ground copper core and a ground insulation layer disposed outside the ground copper core.

[0007] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, the copper core of the power line and the copper core of the ground line are both made of tin-plated oxygen-free copper wire stranded together, the insulation layer of the power line and the insulation layer of the ground line are both made of ethylene propylene rubber extrusion, and the semi-conductive shielding layer is made of halogen-free low-smoke semi-conductive shielding rubber extrusion.

[0008] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, the elastic body is made of bulletproof wires hinged together.

[0009] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, the filler layer is filled with halogen-free low-smoke filler rope in the gap between the power conductor and the ground conductor within the double-sided water-blocking strip.

[0010] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, the double-sided water-blocking tape is a longitudinally wrapped water-blocking tape.

[0011] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, the interlocking armor layer is any one of a copper strip braided reinforcement layer, a steel strip braided reinforcement layer, or an aluminum alloy strip braided reinforcement layer.

[0012] Furthermore, in the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model, both the first flame-retardant layer and the second flame-retardant layer are extruded from halogen-free low-smoke polyolefin material.

[0013] Furthermore, in the coal mine halogen-free low-smoke mobile rubber-sheathed cable of this utility model, both the inner sheath and the outer sheath are wear-resistant halogen-free low-smoke flame-retardant polyolefin sheaths.

[0014] The halogen-free, low-smoke mobile rubber-sheathed cable for coal mines described in this utility model features a double-sided water-blocking strip, an inner sheath, an interlocking armor layer, a first flame-retardant layer, a second flame-retardant layer, and an outer sheath. Furthermore, a filler layer is placed between the power conductor and the ground conductor within the double-sided water-blocking strip. This design not only provides flame-retardant, halogen-free, low-smoke, and non-toxic properties, preventing the generation of large amounts of dense smoke and harmful halogen acid gases during cable combustion, thus ensuring worker safety, but also effectively prevents serious damage to the power cable from fire through the double-layer flame-retardant structure. This ensures the cable's normal operation and reduces the risk of fire and potential safety hazards.

[0015] Therefore, the cable described in this utility model not only meets the requirements for power transmission, but also has the characteristics of flame retardancy, halogen-free, low smoke and non-toxicity. It improves the wear resistance of the cable, prevents damage to the cable due to friction, and extends the service life of the cable, thus meeting the requirements for use in coal mines. It is highly practical, has a simple overall structure and reasonable design, and is worthy of promotion and use. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] The diagram shows: 1-Power conductor core, 11-Power copper core, 12-Power insulation layer, 13-Semi-conductive shielding layer, 2-Ground conductor core, 21-Ground copper core, 22-Ground insulation layer, 3-Elastomer, 4-Filling layer, 5-Double-sided water-blocking tape, 6-Inner sheath, 7-Interlocking armor layer, 8-First flame-retardant layer, 9-Second flame-retardant layer, 10-Outer sheath layer. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0020] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," and "right" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "provided with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] It should be noted that the term "comprising" or any other variation is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] like Figure 1As shown, the present invention discloses a halogen-free, low-smoke mobile rubber-sheathed cable for coal mines, comprising a conductor, the conductor including three power conductors 1 and one ground conductor 2, an elastic body 3 between the power conductors 1 and the ground conductor 2, the power conductors 1 and the ground conductor 2 being arranged tangentially to each other outside the elastic body 3, a double-sided water-blocking strip 5 being provided outside the conductor, and an inner sheath 6, an interlocking armor layer 7, a first flame-retardant layer 8, a second flame-retardant layer 9, and an outer sheath layer 10 being sequentially provided outside the double-sided water-blocking strip 5; a filler layer 4 is also filled between the power conductors 1 and the ground conductor 2 inside the double-sided water-blocking strip 5. The power conductor 1 includes a power copper core 11, a power insulation layer 12 and a semi-conductive shielding layer 13 disposed outside the power copper core 11, and the ground conductor 2 includes a ground copper core 21 and a ground insulation layer 22 disposed outside the ground copper core 21. Both the power copper core 11 and the ground copper core 21 are made of tin-plated oxygen-free copper wire stranded together, both the power insulation layer 12 and the ground insulation layer 22 are made of ethylene propylene rubber extrusion, and the semi-conductive shielding layer 13 is made of halogen-free low-smoke semi-conductive shielding rubber extrusion.

[0024] In the specific manufacturing process, the halogen-free low-smoke mobile rubber-sheathed cable for coal mines described in this utility model is used. The elastic body 3 is made of bulletproof wire hinged together. The filler layer 4 is filled with halogen-free low-smoke filler rope in the gap between the power conductor 1 and the ground conductor 2 within the double-sided water-blocking strip 3. The double-sided water-blocking strip 5 is a longitudinally wrapped water-blocking strip. The interlocking armor layer 7 is any one of a copper strip braided reinforcement layer, a steel strip braided reinforcement layer, or an aluminum alloy strip braided reinforcement layer. To reduce costs, the interlocking armor layer 7 can be an aluminum alloy strip braided reinforcement layer. The first flame-retardant layer 8 and the second flame-retardant layer 9 are both extruded from halogen-free low-smoke polyolefin material. The inner sheath layer 6 and the outer sheath layer 10 are both wear-resistant halogen-free low-smoke flame-retardant polyolefin sheaths.

[0025] The present invention discloses a halogen-free, low-smoke mobile rubber-sheathed cable for coal mines. This cable features an elastic body 3 between the power conductor 1 and the ground conductor 2, and a double-sided water-blocking strip 5 around the conductors. It also includes an inner sheath 6, an interlocking armor layer 7, a first flame-retardant layer 8, a second flame-retardant layer 9, and an outer sheath layer 10. A filler layer 4 is further filled between the power conductor 1 and the ground conductor 2 within the double-sided water-blocking strip 5. The elastic body 3 is made of elastic wire, which enhances the tensile strength of the conductor. The filler layer 4 is made of halogen-free, low-smoke filler rope. The first and second flame-retardant layers 8 and 9 are both extruded from halogen-free, low-smoke polyolefin material, enhancing their flame-retardant properties. Furthermore, since both the inner sheath 6 and the outer sheath layer 10 are abrasion-resistant halogen-free, low-smoke, flame-retardant polyolefin sheaths, they enhance abrasion resistance while maintaining insulation performance. When a fire occurs, the outer sheath 10 does not release harmful gases when it melts, and produces less smoke. Furthermore, the locking armor layer 7 protects the internal conductor after the outer sheath burns out, resulting in better flame retardancy during cable use. This improves the cable's stability in the special environment of coal mines and prevents the generation of large amounts of smoke and toxic corrosive gases during the decomposition process when the cable comes into contact with flames, facilitating subsequent rescue work. Therefore, the cable described in this invention not only possesses flame-retardant, halogen-free, low-smoke, and non-toxic properties, preventing the generation of large amounts of dense smoke and halogen acid gases during cable combustion and ensuring worker safety, but also effectively prevents serious damage to the power cable from fire through its double-layer flame-retardant structure, ensuring normal cable operation and reducing fire and potential safety hazards.

[0026] In summary, the cable described in this utility model not only meets the requirements for power transmission but also possesses flame-retardant, halogen-free, low-smoke, and non-toxic properties. It improves the cable's wear resistance, prevents damage from friction, and extends its service life, thus meeting the requirements for cables used in coal mines. It is highly practical, has a simple overall structure, and a reasonable design, making it worthy of widespread adoption.

[0027] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0028] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. The above description is only a preferred embodiment of this utility model and does not limit this utility model. Any minor modifications, equivalent substitutions and improvements made based on the technical solutions of this utility model should be included within the scope of protection of the technical solutions of this utility model.

Claims

1. A halogen-free, low-smoke mobile rubber-sheathed cable for coal mines, comprising a conductor, characterized in that: The conductor includes a power conductor (1) and a ground conductor (2), with an elastic body (3) between the power conductor (1) and the ground conductor (2). A double-sided water-blocking strip (5) is provided on the outside of the conductor. An inner protective layer (6), an interlocking armor layer (7), a first flame-retardant layer (8), a second flame-retardant layer (9), and an outer sheath layer (10) are sequentially provided on the outside of the double-sided water-blocking strip (5). A filler layer (4) is also filled between the power conductor (1) and the ground conductor (2) inside the double-sided water-blocking strip (5). The power conductor (1) has three conductors, and the ground conductor (2) has one conductor. The power conductor (1) and the ground conductor (2) are arranged in an externally tangent state on the outside of the elastic body (3). The power conductor (1) includes a power copper core (11), and a power insulation layer (12) and a semi-conductive shielding layer (13) disposed outside the power copper core (11). The ground conductor (2) includes a ground copper core (21) and a ground insulation layer (22) disposed outside the ground copper core (21).

2. The halogen-free, low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: The power line copper core (11) and the ground copper core (21) are both made of tin-plated oxygen-free copper wire stranded together. The power line insulation layer (12) and the ground insulation layer (22) are both made of ethylene propylene rubber extrusion. The semi-conductive shielding layer (13) is made of halogen-free low-smoke semi-conductive shielding rubber extrusion.

3. The halogen-free, low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: The elastomer (3) is made of elastic wire hinged together.

4. The halogen-free, low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: The filler layer (4) is filled with halogen-free low-smoke filler rope in the gap between the power conductor (1) and the ground conductor (2) in the double-sided water-blocking strip (3).

5. The halogen-free, low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: The double-sided water-blocking strip (5) is a longitudinally wrapped water-blocking strip.

6. The halogen-free low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: The interlocking armor layer (7) is any one of a copper strip braided reinforcement layer, a steel strip braided reinforcement layer, or an aluminum alloy strip braided reinforcement layer.

7. A halogen-free, low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: Both the first flame retardant layer (8) and the second flame retardant layer (9) are extruded from halogen-free low-smoke polyolefin material.

8. The halogen-free low-smoke mobile rubber-sheathed cable for coal mines according to claim 1, characterized in that: Both the inner sheath (6) and the outer sheath (10) are wear-resistant, halogen-free, low-smoke, flame-retardant polyolefin sheaths.

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