Impact-resistant three-core flat mobile power cable for alternating-current mining equipment

Abstract

The utility model discloses an anti-impact three-core flat mobile power cable for AC mining equipment, comprising a flat EPR insulation isolation core body, the EPR insulation isolation core body is provided with three circular longitudinal holes and two rectangular longitudinal holes which are staggered at intervals in a line shape, the circular longitudinal holes are internally sleeved with power conductors in a clearance manner, and the rectangular longitudinal holes are internally sleeved with the power conductors. A grounding conductor and a grounding detection conductor are respectively sleeved in the two rectangular longitudinal holes in a clearance manner, petroleum jelly is filled in gaps of the circular longitudinal holes and the rectangular longitudinal holes, and a butyl rubber water-blocking pressure-reducing layer, an anti-impact mixed-line woven mesh, a CPE sheath and an EVA wear-resistant protective layer are sequentially coated outside the EPR insulating isolation core body. The cable has good slight impact resistance, the cable core structure is balanced and stable, the wear resistance of the sheath is better, the sheath can be protected from cracking, and the durability is improved.

Description

Technical Field

[0001] The present application belongs to the field of cable technology, and in particular relates to an impact-resistant three-core flat mobile power cable for AC mining equipment. Background Art

[0002] Mining cables are cables used in mines with various voltage levels, electrical equipment, mining equipment, and mining machinery. Among them, flat cables are suitable for AC mining equipment, such as shuttle cars, coal cutters, and loaders. Under complex and changeable working conditions, cables are subjected to repeated stretching and bending for a long time. If the flexibility and tensile strength of the cables are insufficient, they are prone to deformation and core breakage. If they are subjected to slight impact, the cable core structure is prone to deformation. The cables move with the continuous movement of the equipment, which is also very likely to cause outer sheath wear and cracking, greatly affecting the electrical properties and not durable. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present application is to provide an impact-resistant three-core flat mobile power cable for AC mining equipment, which has good resistance to slight impacts, a balanced and stable cable core structure, and better wear resistance of the outer skin, which helps to prevent the outer skin from cracking and improves durability.

[0004] This application solves the above technical problems through the following technical solutions.

[0005] The impact-resistant three-core flat mobile power cable for AC mining equipment comprises a flat EPR insulating isolation core, on which three circular longitudinal holes and two rectangular longitudinal holes are staggered in a straight line, a power conductor is sleeved in the gaps in the circular longitudinal holes, a grounding conductor and a grounding detection conductor are sleeved in the gaps in the two rectangular longitudinal holes respectively, the gaps in the circular longitudinal holes and the rectangular longitudinal holes are filled with petroleum jelly, and the outside of the EPR insulating isolation core is sequentially coated with a butyl rubber water-blocking and pressure-reducing layer, an impact-resistant mixed-wire braided mesh, a CPE sheath and an EVA wear-resistant protective layer.

[0006] Preferably, the power conductor is formed by twisting a plurality of tinned copper monofilaments and para-type wholly aromatic copolyamide stretched fiber filaments.

[0007] Preferably, the diameter of the tinned copper monofilament is 0.08 mm to 0.3 mm.

[0008] Preferably, the CPE sheath thickness is 2.4 mm, 2.8 mm, 3.2 mm, 3.6 mm or 3.9 mm.

[0009] Preferably, the EPR insulation isolation core has a thickness of 1.5 mm to 2 mm.

[0010] Preferably, the spacing between adjacent circular longitudinal holes and adjacent rectangular longitudinal holes is 1.5 mm to 3 mm.

[0011] Preferably, the impact-resistant mixed-wire braided mesh is an inner and outer double-layer mixed-wire flat woven mesh structure and is formed by mixing Kevlar wire and stainless steel wire.

[0012] Preferably, the inner layer mixed wire flat woven mesh is formed by weaving a mixture of fine Kevlar wire and fine stainless steel wire, and the outer layer mixed wire flat woven mesh is formed by weaving a mixture of coarse Kevlar wire and coarse stainless steel wire, the diameter of the coarse Kevlar wire is 3 to 8 times the diameter of the fine Kevlar wire, the diameter of the coarse stainless steel wire is 3 to 5 times the diameter of the fine stainless steel wire, and the weaving density of the inner layer mixed wire flat woven mesh is greater than the weaving density of the outer layer mixed wire flat woven mesh.

[0013] Preferably, the height of the EVA wear-resistant protective layer is 19 mm to 22 mm, and the width of the EVA wear-resistant protective layer is 52 mm to 58 mm.

[0014] Preferably, the EVA wear-resistant protective layer has a thickness of 0.1 mm to 0.3 mm.

[0015] Beneficial effects of this application:

[0016] 1. By respectively sleeve the three power conductors, the grounding conductor and the grounding detection conductor in the circular longitudinal holes and the rectangular longitudinal holes of the flat EPR insulation isolation core, an effective electrical insulation distance is formed and the mechanical strength is ensured. The structure is balanced and stable, which helps to reduce the load on each conductor, inhibit wire breakage, improve the cable's resistance to slight impact, ensure stable and reliable electrical characteristics, and better durability.

[0017] 2. The impact resistance of the cable is enhanced by adding an impact-resistant mixed-wire braided net between the butyl rubber water-blocking and pressure-reducing layer and the CPE sheath. The impact-resistant mixed-wire braided net is formed by weaving Kevlar wire and stainless steel wire. The strong rigidity of the stainless steel wire is combined with the flexibility of the Kevlar wire, which takes into account the improvement of the mechanical strength, impact resistance and bending resistance of the cable. When the cable is subjected to a slight impact, it effectively suppresses the damage to the wire cores inside the cable core caused by external forces, ensures the mechanical strength and electrical characteristics of the cable, increases safety and reliability, prolongs service life, and has better durability.

[0018] 3. Filling petroleum jelly in the gaps between the circular and rectangular longitudinal holes to prevent longitudinal water seepage, adding a butyl rubber water-blocking and pressure-reducing layer to prevent water vapor from invading from the outside, enhancing the barrier performance against water vapor diffusion, and coating the CPE sheath with an EVA wear-resistant protective layer can effectively improve the wear resistance of the cable sheath, inhibit wear and tear, prevent the sheath from cracking, and improve durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1-EPR insulation isolation core, 2-circular vertical hole, 3-rectangular vertical hole, 4-power conductor, 5-grounding conductor, 6-grounding detection conductor, 7-petroleum jelly, 8-butyl rubber water-blocking and pressure-reducing layer, 9-impact-resistant mixed-wire braided mesh, 10-CPE sheath, 11-EVA wear-resistant protective layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0023] See also Figure 1 The impact-resistant three-core flat mobile power cable for AC mining equipment of the embodiment of the present application comprises a flat EPR insulating isolation core 1, on which three circular longitudinal holes 2 and two rectangular longitudinal holes 3 are staggered in a straight line. Furthermore, the thickness of the EPR insulating isolation core 1 is 1.5 mm to 2 mm, and the spacing distance between adjacent circular longitudinal holes 2 and rectangular longitudinal holes 3 is 1.5 mm to 3 mm. A power conductor 4 is sleeved in the gap in the circular longitudinal hole 2. Specifically, the power conductor 4 is composed of a plurality of tinned copper monofilaments and para-type fully aromatic copolyamide stretched fiber yarns twisted together. Furthermore, the wire diameter of the tinned copper monofilament is 0.08 mm to 0.3 mm. A grounding conductor 5 and a grounding detection conductor 6 are sleeved in the gaps in the two rectangular longitudinal holes 3, respectively. The gaps in the circular longitudinal hole 2 and the rectangular longitudinal hole 3 are filled with petroleum jelly 7.

[0024] The EPR insulation isolation core 1 is coated with a butyl rubber water-blocking and pressure-reducing layer 8, an impact-resistant mixed wire braided mesh 9, a CPE sheath 10 and an EVA wear-resistant protective layer 11 in sequence. In one embodiment, the impact-resistant mixed wire braided mesh 9 is an inner and outer double-layer mixed wire flat woven mesh structure and is formed by kevlar wire and stainless steel wire mixed wire. Further, the inner layer of mixed wire flat woven mesh is formed by fine kevlar wire and fine stainless steel wire mixed wire, and the outer layer of mixed wire flat woven mesh is formed by coarse kevlar wire and coarse stainless steel wire mixed wire. The diameter of the coarse kevlar wire is 3 to 8 times the diameter of the fine kevlar wire, and the coarse stainless steel wire is 3 to 5 times the diameter of the fine stainless steel wire. The braiding density of the inner layer of mixed wire flat woven mesh is greater than the braiding density of the outer layer of mixed wire flat woven mesh. The thickness of the CPE sheath 10 is 2.4mm, 2.8mm, 3.2mm, 3.6mm or 3.9mm. The thickness of the EVA wear-resistant protective layer 11 is 0.1mm to 0.3mm. The height of the EVA wear-resistant protective layer 11 is 19 mm to 22 mm, and the width of the EVA wear-resistant protective layer 11 is 52 mm to 58 mm.

[0025] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. Impact-resistant three-core flat mobile power cable for AC mining equipment, characterized by: The invention comprises a flat EPR insulating isolation core (1), wherein the EPR insulating isolation core (1) is provided with three circular longitudinal holes (2) and two rectangular longitudinal holes (3) at intervals and in a straight line, wherein a power conductor (4) is sleeved in a gap in the circular longitudinal hole (2), and a grounding conductor (5) and a grounding detection conductor (6) are sleeved in a gap in the two rectangular longitudinal holes (3), respectively, and the gaps in the circular longitudinal hole (2) and the rectangular longitudinal hole (3) are filled with petroleum jelly (7), and the outside of the EPR insulating isolation core (1) is sequentially coated with a butyl rubber water-blocking and pressure-reducing layer (8), an impact-resistant mixed-wire braided mesh (9), a CPE sheath (10) and an EVA wear-resistant protective layer (11).

2. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1 is characterized by: The power conductor (4) is composed of a plurality of tinned copper monofilaments and para-type fully aromatic copolyamide stretched fiber filaments twisted together.

3. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 2 is characterized by: The diameter of the tinned copper monofilament is 0.08 mm to 0.3 mm.

4. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1 is characterized by: The thickness of the CPE sheath (10) is 2.4 mm, 2.8 mm, 3.2 mm, 3.6 mm or 3.9 mm.

5. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1 is characterized by: The EPR insulating isolation core (1) has a thickness of 1.5 mm to 2 mm.

6. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1 is characterized by: The spacing between adjacent circular longitudinal holes (2) and rectangular longitudinal holes (3) is 1.5 mm to 3 mm.

7. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1 is characterized by: The impact-resistant mixed-wire braided mesh (9) is an inner and outer double-layer mixed-wire flat braided mesh structure and is formed by the mixed braiding of Kevlar wire and stainless steel wire.

8. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 7 is characterized by: The inner layer mixed wire flat woven mesh is formed by weaving a mixture of fine Kevlar wire and fine stainless steel wire, and the outer layer mixed wire flat woven mesh is formed by weaving a mixture of coarse Kevlar wire and coarse stainless steel wire. The diameter of the coarse Kevlar wire is 3 to 8 times the diameter of the fine Kevlar wire, and the diameter of the coarse stainless steel wire is 3 to 5 times the diameter of the fine stainless steel wire. The weaving density of the inner layer mixed wire flat woven mesh is greater than the weaving density of the outer layer mixed wire flat woven mesh.

9. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1, characterized in that: The height of the EVA wear-resistant protective layer (11) is 19 mm to 22 mm, and the width of the EVA wear-resistant protective layer (11) is 52 mm to 58 mm.

10. The impact-resistant three-core flat mobile power cable for AC mining equipment according to claim 1, characterized in that: The thickness of the EVA wear-resistant protective layer (11) is 0.1 mm to 0.3 mm.

Images