Bending-resistant cable for coal mining machine

Abstract

The utility model relates to a bending-resistant cable for a coal mining machine. The technical problem to be solved by the utility model is to provide the bending-resistant cable for the coal mining machine. According to the technical scheme, the cable comprises a control wire core set, a power cable core assembly and a ground wire core assembly, a cable inner sheath, a monitoring wire assembly, an anti-bending layer assembly and an outer sheath are sequentially wrapped outside the power cable core assembly and the ground wire core assembly, and the monitoring wire assembly comprises a cable monitoring layer and an insulating wrapping tape. The anti-bending layer assembly comprises a reinforcing layer, deformation blocks are arranged on the reinforcing layer around an arc at intervals, an anti-bending compression opening is formed between the two deformation blocks, and the anti-bending compression opening is narrow inside and wide outside. The coal mining machine cable has the advantages that part of bending extrusion force can be released through the anti-bending compression port during bending, so that the acting force on the internal wire core is reduced, the anti-bending capability of the coal mining machine cable is improved, the service life is prolonged, the monitoring wire assembly can remind when the cable is bent and broken, and the safety is higher.

Description

Technical Field

[0001] The utility model relates to a bending-resistant coal mining machine cable. Background Art

[0002] Coal shearer cables are a special type of cable, primarily used in coal shearers and similar equipment in coal mines, providing electrical conduction and signal control. Coal shearer cables operate in harsh environments, undergoing constant S-shaped bending daily. This can easily break the internal control core, resulting in a short service life. Furthermore, existing shearer cables lack monitoring capabilities, preventing timely notification of cable breaks and resulting in poor safety. To address this, improvements and optimizations to existing shearer cables are being sought. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a bending-resistant coal mining machine cable.

[0004] The technical solution adopted by the utility model of the anti-bending coal mining machine cable is characterized in that it includes a control wire core group arranged in a central position, three power cable core assemblies spaced around the control wire core group and tangent to the control wire core group, and three ground wire core assemblies spaced around the control wire core group and placed between two of the power cable core assemblies. The power cable core assembly and the ground wire core assembly are wrapped with a cable inner sheath, a monitoring wire assembly, an anti-bending layer assembly and an outer sheath in sequence. The monitoring wire assembly includes a cable monitoring layer and an insulating tape wrapped around the outside of the cable monitoring layer. The anti-bending layer assembly includes a reinforcement layer wrapped around the monitoring wire assembly. The reinforcement layer is provided with deformation blocks spaced around a circular arc, and an anti-bending compression opening is provided between two of the deformation blocks. The anti-bending compression opening is narrow inside and wide outside.

[0005] The control wire core group includes a control wire core assembly and a control wire core sheath extruded outside the control wire core assembly. The control wire core assembly includes a control wire core conductor and a control wire core insulation layer wrapped outside the control wire core conductor. The number of the control wire core assemblies is 2.

[0006] The cable monitoring layer includes a monitoring core semi-conductive sheath extruded outside the cable inner sheath and monitoring core conductors arranged at intervals around an arc, and the monitoring core conductors correspond to the power cable core assembly and the ground wire core assembly respectively.

[0007] The power cable core assembly includes a power core conductor and a power core insulation layer and a power core shielding layer which are sequentially wrapped around the power core conductor.

[0008] The ground core assembly includes a ground core conductor and a ground core insulation layer wrapped around the ground core conductor.

[0009] The control wire core insulation layer is made of rubber material with EPDM as the base material.

[0010] The advantages of the utility model of the anti-bending coal mining machine cable are: when bending, part of the bending extrusion force can be released through the anti-bending compression mouth to reduce the force on the internal wire core, thereby improving the bending resistance of the coal mining machine cable and extending its service life. The narrow inside and wide outside design can increase the bending difficulty as the bending amplitude increases and has a rebound force so that it can recover after bending. It has stronger applicability and more flexible use. The monitoring line component can remind when bending and breaking occurs, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0012] Figure 1 This is the front view of the utility model anti-bending coal mining machine cable;

[0013] Figure 2 It is a structural schematic diagram of the utility model of the anti-bending coal mining machine cable. DETAILED DESCRIPTION

[0014] like Figure 1-2 As shown, the utility model relates to an anti-bending coal mining machine cable, comprising a control wire core group 1 arranged at a central position, three power cable core assemblies 2 spaced apart around the control wire core group 1 and tangent to the control wire core group 1, and three ground wire core assemblies 3 spaced apart around the control wire core group 1 and placed between two of the power cable core assemblies 2. The power cable core assembly 2 and the ground wire core assembly 3 are wrapped with a cable inner sheath 5, a monitoring wire assembly 6, an anti-bending layer assembly 7 and an outer sheath 8 in sequence. The monitoring wire assembly 6 includes a cable monitoring layer 10 and an insulating tape 11 wrapped around the outside of the cable monitoring layer 10. The anti-bending layer assembly 7 includes a reinforcement layer 13 wrapped around the monitoring line component 6, and the reinforcement layer 13 is provided with deformation blocks 14 at intervals around the arc, and an anti-bending compression mouth 15 is provided between the two deformation blocks 14. The anti-bending compression mouth 15 is narrow inside and wide outside. When bending, part of the bending extrusion force can be released through the anti-bending compression mouth 15 to reduce the force on the internal wire core, thereby improving the bending resistance of the coal mining machine cable and extending its service life. The narrow inside and wide outside design can increase the bending difficulty as the bending amplitude increases and has a rebound force so that it can recover after bending. It has stronger applicability and is more flexible to use. The monitoring line component 6 can remind when bending and breaking occurs, and is safer.

[0015] The control wire core group 1 includes a control wire core assembly 17 and a control wire core sheath 18 extruded outside the control wire core assembly 17. The control wire core assembly 17 includes a control wire core conductor 19 and a control wire core insulation layer 20 wrapped outside the control wire core conductor 19. The number of the control wire core assemblies 17 is 2. When the control wire core is damaged or broken, a spare control wire core can be selected in time, which makes replacement more convenient and quick, and has a good user experience.

[0016] The cable monitoring layer 10 includes a monitoring core semi-conductive sheath 22 extruded on the outside of the cable inner sheath 5 and a monitoring core conductor 23 arranged at intervals around an arc. The monitoring core conductor 23 corresponds to the power cable core assembly 2 and the ground wire core assembly 3 respectively. The monitoring core semi-conductive sheath is a shielding layer of semi-conductive material added to the surface of the monitoring core conductor. The inner semiconductor layer fills the air gap between the conductor and the insulating layer and the unevenness on the surface of the conductor to form a smooth surface combined with the insulating layer to ensure that the electric field distribution between the insulating layer and the conductor is as uniform as possible.

[0017] The power cable core assembly 2 includes a power core conductor 25 and a power core insulation layer 26 and a power core shielding layer 27 sequentially wrapped around the power core conductor 25 .

[0018] The ground core assembly 3 includes a ground core conductor 29 and a ground core insulation layer 30 wrapped around the ground core conductor 29 .

[0019] The control wire core insulation layer 20 is made of a rubber material based on EPDM, which has good insulation, low density and high filling capacity, and effectively reduces costs.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A bending-resistant coal mining machine cable, characterized in that: The invention comprises a control wire core group (1) arranged at a central position, three power cable core assemblies (2) arranged at intervals around the control wire core group (1) and tangent to the control wire core group (1), and three ground wire core assemblies (3) arranged at intervals around the control wire core group (1) and placed between two of the power cable core assemblies (2); the power cable core assembly (2) and the ground wire core assembly (3) are respectively wrapped with a cable inner sheath (5), a monitoring wire assembly (6), an anti-bending layer assembly (7) and an outer sheath (8); the monitoring wire assembly (6) comprises a cable monitoring layer (10) and an insulating tape (11) wrapped around the outer side of the cable monitoring layer (10); the anti-bending layer assembly (7) comprises a reinforcing layer (13) wrapped around the monitoring wire assembly (6); the reinforcing layer (13) is provided with deformation blocks (14) at intervals around a circular arc; an anti-bending compression opening (15) is provided between two of the deformation blocks (14); the anti-bending compression opening (15) is narrow inside and wide outside.

2. The bending-resistant coal mining machine cable according to claim 1, characterized in that: The control wire core group (1) comprises a control wire core assembly (17) and a control wire core sheath (18) extruded outside the control wire core assembly (17); the control wire core assembly (17) comprises a control wire core conductor (19) and a control wire core insulation layer (20) wrapped outside the control wire core conductor (19); the number of the control wire core assemblies (17) is 2.

3. The bending-resistant coal mining machine cable according to claim 1, characterized in that: The cable monitoring layer (10) comprises a monitoring core semi-conductive sheath (22) extruded outside the cable inner sheath (5) and monitoring wire core conductors (23) arranged at intervals around a circular arc, wherein the monitoring wire core conductors (23) correspond to the power cable core assembly (2) and the ground wire core assembly (3), respectively.

4. The bending-resistant coal mining machine cable according to claim 1, characterized in that: The power cable core assembly (2) comprises a power core conductor (25), and a power core insulation layer (26) and a power core shielding layer (27) which are sequentially wrapped around the power core conductor (25).

5. The bending-resistant coal mining machine cable according to claim 1, characterized in that: The ground wire core assembly (3) comprises a ground wire core conductor (29) and a ground wire core insulation layer (30) wrapped around the ground wire core conductor (29).

6. The bending-resistant coal mining machine cable according to claim 2, characterized in that: The control wire core insulation layer (20) is made of a rubber material with EPDM as the base material.

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