Shielded cable for a coal mining machine

Abstract

The application discloses a shielded cable for a coal mining machine, and belongs to the technical field of cables, which comprises a conductor, an insulating layer is sleeved on the outer surface of the conductor, an inner shielding layer is arranged on the outer surface of the insulating layer, an outer shielding layer is arranged on the outer surface of the inner shielding layer, and a protective sleeve is sleeved on the outer surface of the outer shielding layer; the conductor is used for conveying power supply to a motor, the insulating layer can prevent current leakage, the inner shielding layer can reduce internal electromagnetic interference, and the outer shielding layer can further enhance the protection against external electromagnetic interference, namely, the shielded cable can effectively isolate external and internal electromagnetic interference through the cooperation of the inner shielding layer and the outer shielding layer, thereby ensuring the stable transmission of electric signals; the graphene film has excellent conductivity and heat dissipation performance, and can further improve the overall performance of the shielded cable; and the protective sleeve provides additional mechanical protection and prevents abrasion and corrosion.

Description

Technical Field

[0001] This application relates to the field of cable technology, and in particular to a shielded cable for a coal mining machine. Background Technology

[0002] With the development of the coal industry and the continuous improvement of mine mechanization, coal mining machines, as important pieces of machinery, play a crucial role in mining operations. When these machines operate underground, the cables used to power them require extremely high performance. Therefore, developing shielded cables with excellent electrical and physical-mechanical properties has become a key research focus.

[0003] Due to the complex and variable underground environment and severe electromagnetic interference, traditional ordinary cables cannot meet the requirements of high reliability and anti-interference. Therefore, an improvement has been made to a shielded cable for coal mining machines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a shielded cable for coal mining machines, which overcomes the deficiencies of existing technologies and aims to solve the problem that traditional ordinary cables cannot meet the requirements of high reliability and anti-interference due to the complex and variable underground environment and severe electromagnetic interference.

[0005] To achieve the above objectives, this application provides the following technical solution: a shielded cable for a coal mining machine, comprising a conductor, an insulating layer sleeved on the outer surface of the conductor, an inner shielding layer disposed on the outer surface of the insulating layer, an outer shielding layer disposed on the outer surface of the inner shielding layer, a protective sleeve sleeved on the outer surface of the outer shielding layer, and a graphene film disposed between the outer shielding layer and the protective sleeve.

[0006] By adopting the above technical solution, when the coal mining machine starts, the power is transmitted to the motor through the conductor. The insulation layer can prevent current leakage, the inner shielding layer can reduce internal electromagnetic interference, and the outer shielding layer can further enhance the protection against external electromagnetic interference. That is, the shielded cable can effectively isolate external and internal electromagnetic interference through the combined action of the inner and outer shielding layers, ensuring stable transmission of electrical signals. The graphene film has excellent conductivity and heat dissipation performance, which can further improve the overall performance of the shielded cable. The protective sleeve provides additional mechanical protection to prevent wear and corrosion.

[0007] As a preferred technical solution of this application, the conductor is made of multiple strands of tin-plated copper wire twisted together, with a diameter of 5mm.

[0008] By adopting the above technical solution, which uses multiple tinned copper wires twisted together, the overall resistance of the conductor is reduced, thereby improving the conductivity of the conductor. In addition, the multi-strand twisting design can better distribute stress, making the conductor less prone to breakage when bent, thus maintaining the stability of the shielded cable and ensuring unimpeded signal transmission.

[0009] As a preferred technical solution of this application, the insulating layer is made of cross-linked polyethylene material with a thickness of 1.5 mm, and the insulating layer is tightly attached to the outer surface of the conductor to fully wrap it.

[0010] By adopting the above technical solution, cross-linked polyethylene has excellent electrical, mechanical and heat resistance properties. The insulation layer made from this material can effectively isolate the conductor from the outside world, prevent current leakage, and ensure the safety and stability of power transmission. Moreover, since the insulation layer is closely attached to the outer surface of the conductor and fully wraps it, it can ensure a tight bond between the conductor and the insulation layer, reduce air gaps and defects, and thus improve the overall performance of the insulation layer.

[0011] As a preferred technical solution of this application, the inner shielding layer is formed by spiral winding of fine copper wire, and the outer shielding layer is formed by longitudinal stacking of aluminum alloy strips.

[0012] By adopting the above technical solution, the inner shielding layer is made of fine copper wire spirally wound to form a tight shielding mesh, which can effectively block the interference of external electromagnetic waves and prevent the internal signal of the shielded cable from leaking out. The outer shielding layer is made of aluminum alloy strip longitudinally wrapped and stacked, which further enhances the electromagnetic shielding capability of the shielded cable.

[0013] As a preferred technical solution of this application, the protective sleeve is made of modified neoprene rubber material and nano-silica particles are added inside the material, with a thickness of 2mm.

[0014] By adopting the above technical solution, the protective sleeve made of modified neoprene rubber material has excellent wear resistance and corrosion resistance, which can protect the entire shielded cable from the influence of the external environment. By adding nano silica particles to the protective sleeve material, its wear resistance and corrosion resistance are further enhanced, which helps to extend the service life of the shielded cable.

[0015] As a preferred technical solution of this application, the insulating layer, inner shielding layer, outer shielding layer, graphene film and protective sleeve are tightly bonded together by a hot pressing process.

[0016] By adopting the above technical solutions, the overall structure's compactness and stability are guaranteed.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In this invention, when the coal mining machine starts, power is transmitted to the motor through a conductor. The insulation layer prevents current leakage, the inner shielding layer reduces internal electromagnetic interference, and the outer shielding layer further enhances protection against external electromagnetic interference. In other words, the shielded cable can effectively isolate external and internal electromagnetic interference through the combined action of the inner and outer shielding layers, ensuring stable transmission of electrical signals. The graphene film has excellent conductivity and heat dissipation properties, which can further improve the overall performance of the shielded cable. The protective sleeve provides additional mechanical protection to prevent wear and corrosion.

[0018] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the graphene film structure of this application; Figure 3 This is a schematic diagram of the conductor structure of this application; Figure 4 This is a frontal sectional view of the structure of this application.

[0020] In the diagram: 1. Conductor; 2. Insulating layer; 3. Inner shielding layer; 4. Outer shielding layer; 5. Graphene film; 6. Protective sleeve. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 - Figure 4As shown in the figure, this embodiment provides a shielded cable for a coal mining machine, including a conductor 1, an insulation layer 2 sleeved on the outer surface of the conductor 1, an inner shielding layer 3 disposed on the outer surface of the insulation layer 2, an outer shielding layer 4 disposed on the outer surface of the inner shielding layer 3, a protective sleeve 6 sleeved on the outer surface of the outer shielding layer 4, and a graphene film 5 disposed between the outer shielding layer 4 and the protective sleeve 6. In use, when the coal mining machine is started, power is transmitted to the motor through the conductor 1. The insulation layer 2 prevents current leakage, the inner shielding layer 3 reduces internal electromagnetic interference, and the outer shielding layer 4 further enhances the protection against external electromagnetic interference. That is, the shielded cable can effectively isolate external and internal electromagnetic interference through the combined action of the inner shielding layer 3 and the outer shielding layer 4, ensuring stable transmission of electrical signals. The graphene film 5 has excellent conductivity and heat dissipation performance, which can further improve the overall performance of the shielded cable. The protective sleeve 6 provides additional mechanical protection to prevent wear and corrosion.

[0023] In this embodiment, as Figure 3 As shown, conductor 1 is made of multiple strands of tinned copper wire with a diameter of 5mm. In use, the use of multiple strands of tinned copper wire reduces the overall resistance of conductor 1, thereby improving its conductivity. The multi-strand design also better disperses stress, making conductor 1 less prone to breakage when bent, thus maintaining the stability of the shielded cable and ensuring unobstructed signal transmission.

[0024] In this embodiment, as Figure 4 As shown, the insulation layer 2 is made of cross-linked polyethylene material with a thickness of 1.5 mm. The insulation layer 2 is tightly attached to the outer surface of the conductor 1 and completely wraps it. In use, cross-linked polyethylene has excellent electrical, mechanical and heat resistance properties. The insulation layer 2 made of this material can effectively isolate the conductor 1 from the outside world, prevent current leakage, and ensure the safety and stability of power transmission. Since the insulation layer 2 is tightly attached to the outer surface of the conductor 1 and completely wraps it, it can ensure a tight bond between the conductor 1 and the insulation layer 2, reduce air gaps and defects, and thus improve the overall performance of the insulation layer 2.

[0025] In this embodiment, as Figure 2 and 4 As shown, the inner shielding layer 3 is formed by spiral winding of fine copper wire, and the outer shielding layer 4 is formed by longitudinally stacking aluminum alloy strips. In use, the inner shielding layer 3 is formed by spiral winding of fine copper wire, which can form a tight shielding mesh, effectively blocking the interference of external electromagnetic waves and preventing the internal signal of the shielded cable from leaking out. The outer shielding layer 4 is formed by longitudinally stacking aluminum alloy strips, which further enhances the electromagnetic shielding capability of the shielded cable.

[0026] In this embodiment, as Figure 1As shown, the protective sleeve 6 is made of modified neoprene rubber material with nano-silica particles added inside the material, and has a thickness of 2mm. When in use, the protective sleeve 6 made of modified neoprene rubber material has excellent wear resistance and corrosion resistance, which can protect the entire shielded cable from the influence of the external environment. By adding nano-silica particles to the material of the protective sleeve 6, its wear resistance and corrosion resistance are further enhanced, which helps to extend the service life of the shielded cable.

[0027] In this embodiment, as Figure 1 and 4 As shown, the insulating layer 2, inner shielding layer 3, outer shielding layer 4, graphene film 5, and protective sleeve 6 are tightly bonded together by a hot-pressing process, ensuring the tightness and stability of the overall structure during use.

[0028] The working principle of this utility model is as follows: When using the shielded cable for a coal mining machine according to this application, when the coal mining machine is started, the power is transmitted to the motor through the conductor 1. The insulation layer 2 can prevent current leakage, the inner shielding layer 3 can reduce internal electromagnetic interference, and the outer shielding layer 4 can further enhance the protection against external electromagnetic interference. That is, the shielded cable can effectively isolate external and internal electromagnetic interference through the combined action of the inner shielding layer 3 and the outer shielding layer 4, ensuring stable transmission of electrical signals. The graphene film 5 has excellent conductivity and heat dissipation performance, which can further improve the overall performance of the shielded cable. The protective sleeve 6 provides additional mechanical protection to prevent wear and corrosion.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A shielded cable for a coal mining machine, comprising a conductor (1), characterized in that, An insulating layer (2) is sleeved on the outer surface of the conductor (1), an inner shielding layer (3) is provided on the outer surface of the insulating layer (2), an outer shielding layer (4) is provided on the outer surface of the inner shielding layer (3), a protective sleeve (6) is sleeved on the outer surface of the outer shielding layer (4), and a graphene film (5) is provided between the outer shielding layer (4) and the protective sleeve (6).

2. The shielded cable for a coal mining machine according to claim 1, characterized in that, The conductor (1) is made of multiple strands of tin-plated copper wire twisted together, with a diameter of 5 mm.

3. The shielded cable for a coal mining machine according to claim 1, characterized in that, The insulating layer (2) is made of cross-linked polyethylene material with a thickness of 1.5 mm, and the insulating layer (2) is tightly attached to the outer surface of the conductor (1) to fully wrap it.

4. The shielded cable for a coal mining machine according to claim 1, characterized in that, The inner shielding layer (3) is formed by spiral winding of fine copper wire, and the outer shielding layer (4) is formed by longitudinal stacking of aluminum alloy strips.

5. The shielded cable for a coal mining machine according to claim 1, characterized in that, The protective sleeve (6) has a thickness of 2mm.

6. The shielded cable for a coal mining machine according to claim 1, characterized in that, The insulating layer (2), inner shielding layer (3), outer shielding layer (4), graphene film (5) and protective sleeve (6) are tightly bonded together by a hot pressing process.

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