Steel core copper conductor stainless steel wire armored combination cable for buggy ladle

Abstract

The utility model discloses a steel core copper conductor stainless steel wire armored combination cable for a buggy ladle, which comprises three power wire cores and a control wire core, the three power wire cores and the control wire core are uniformly distributed at intervals of 90 degrees in the circumferential direction through an X-shaped polyurethane elastomer isolation core, a central hole is formed in the central part of the X-shaped polyurethane elastomer isolation core, and a galvanized steel wire reinforced core is sleeved in the central hole; and a polyether polyurethane inner sheath layer, a Kevlar fiber inner braid layer, a stainless steel wire armor layer, a Kevlar fiber outer braid layer and a polyether polyurethane outer sheath layer are sequentially coated outside the X-shaped polyurethane elastomer isolation core. The cable is better in flexibility and structural stability, the sheath is prevented from wrinkling, the cable is prevented from being twisted and deformed, the durability and the applicability are improved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of cables, and in particular to a steel core copper conductor stainless steel wire armored steel ladle vehicle combined cable. Background Art

[0002] Drum cables are mainly used in bucket wheel excavators, port machinery, ladle cars, electric scrapers and other equipment. As the equipment moves back and forth, the drum reels and unwinds the wires. The special cable for ladle cars is subjected to positive tension and bending deformation during operation. At present, the cable structure is not stable enough. When it is bent during working hours, the cable structure is prone to distortion, the cable core is arched, and the cable is bent and deformed. The cable is very prone to quality problems such as wrinkled sheath and twisted cable, which brings safety hazards to the normal production of the equipment. Utility Model Content

[0003] The present application aims to solve the technical problem of providing a steel core copper conductor stainless steel wire armored steel ladle vehicle combination cable in view of the deficiencies in the prior art. The cable has better flexibility and structural stability, avoids wrinkling of the sheath and twisting and deformation of the cable, improves durability and reduces safety hazards.

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

[0005] A steel core copper conductor stainless steel wire armored steel ladle vehicle combined cable comprises three power cores and one control core which are evenly spaced at 90 degree intervals in the circumferential direction through an X-shaped polyurethane elastomer isolation core, the free ends of the four bifurcated partitions of the X-shaped polyurethane elastomer isolation core extend outwardly to form a fan-shaped portion, a center hole is provided in the center of the X-shaped polyurethane elastomer isolation core, a galvanized steel wire reinforcement core is sleeved in the center hole, the power core conductor comprises a stainless steel stranded wire inner core, a plurality of tinned copper strands are twisted in two to three layers around the outside of the stainless steel stranded wire inner core to form a tinned copper strand conductor layer, the control core comprises three insulating cores twisted together to form a core body, the outside of the core body is coated with a nitrile polyvinyl chloride sheath layer, the insulating core comprises an inner conductor and a silicone rubber insulation layer, and the outside of the X-shaped polyurethane elastomer isolation core is sequentially coated with a polyether polyurethane inner sheath layer, a Kevlar fiber inner braided layer, a stainless steel wire armor layer, a Kevlar fiber outer braided layer and a polyether polyurethane outer sheath layer.

[0006] Preferably, the tinned copper strands are composed of a plurality of tinned copper strands twisted together, and the tinned copper strands are composed of a plurality of tinned copper single wires with a diameter of 0.02 mm to 0.1 mm twisted together.

[0007] Preferably, the inner conductor is formed by twisting a number of tinned copper monofilaments with a diameter of 0.05 mm to 0.08 mm.

[0008] Preferably, the galvanized steel wire strengthening core is formed by stranding a plurality of galvanized steel wires, and the wire diameter of the galvanized steel wire is 0.5 mm to 2 mm.

[0009] Preferably, the central hole is filled with insulating lubricating silicone grease.

[0010] Preferably, the stainless steel wire armor layer is a double-layer inner and outer flat woven stainless steel wire structure. The inner layer of the flat woven stainless steel wire is formed by weaving fine stainless steel wires, and the outer layer of the flat woven stainless steel wire is formed by weaving thick stainless steel wires. The thick stainless steel wire is 2 to 5 times the wire diameter of the fine stainless steel wire.

[0011] Preferably, the weaving density of the inner layer of the flat woven stainless steel wire is greater than that of the outer layer of the flat woven stainless steel wire.

[0012] Preferably, the cross-sectional area of the power core is 4 mm 2 to 120 mm 2 , and the cross-sectional area of the control core is 2.5 mm 2 to 10 mm 2 .

[0013] Preferably, both the inner braided layer of Kevlar fiber and the outer braided layer of Kevlar fiber are a double-layer inner and outer Kevlar wire reverse spiral winding braided structure with a braiding density of not less than 95%.

[0014] Preferably, thermoplastic EVA adhesive layers are provided on the outer surface of the inner polyether polyurethane sheath layer and the inner surface of the outer polyether polyurethane sheath layer.

[0015] Advantages of the present application:

[0016] 1. Through the X-shaped polyurethane elastomer isolation core, three power cores, one control core and one galvanized steel wire strengthening core are evenly distributed in isolation, forming an effective electrical insulation distance and ensuring mechanical strength. The cable core structure is round, more balanced and stable, with better flexibility and bending resistance. The use of the inner and outer polyether polyurethane sheath layer structure helps to improve the flexibility of the cable. Adding a stainless steel wire armor layer provides additional mechanical protection, and adding inner and outer braided layers of Kevlar fiber on the inside and outside of the stainless steel wire armor layer. Kevlar wire has high strength, high modulus and better flexibility. The rigidity of the stainless steel wire combined with the flexibility of Kevlar fiber takes into account improving the flexibility and mechanical strength of the cable, protecting the sheath layer, and at the same time taking into account the flexibility of the cable. The flexibility and structural stability of the cable are better, which helps to avoid sheath wrinkling and cable twisting and deformation, reduce potential safety hazards, ensure stable and reliable electrical characteristics, and have better durability and application performance.

[0017] 2. By optimizing the conductor of the power core to a steel-core copper conductor structure, adopting a structure of a stainless-steel stranded wire inner core and a tinned copper stranded wire conductor layer formed by two to three layers of stranding, it is beneficial to improve the flexibility and bending resistance of the inner conductor. The linear expansion coefficient of the stainless-steel wire is less than that of the tinned copper wire, which helps to balance and absorb the elongation of the cable and suppress the elongation force at the cable end. The tensile strength of the stainless-steel wire is greater than that of the tinned copper wire, which suppresses the occurrence of wire breakage, ensures stable and reliable electrical characteristics, and improves the durability and applicability.

[0018] 3. The galvanized steel wire strengthening core has high tensile strength and excellent tensile resistance performance, which unloads the load stress externally applied to the cable core to a certain extent, improves the flexibility and tensile resistance performance of the cable, and enhances the durability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] DESCRIPTION OF THE REFERENCE NUMERALS:

[0021] 1 - Power core, 2 - Control core, 3 - X-shaped polyurethane elastomer isolation core, 4 - Bifurcation partition, 5 - Sector part, 6 - Central hole, 7 - Galvanized steel wire strengthening core, 8 - Power core conductor, 9 - Ethylene propylene diene monomer (EPDM) isolation layer, 10 - Nitrile polyvinyl chloride insulation layer, 11 - Insulated core, 12 - Nitrile polyvinyl chloride sheath layer, 13 - Inner conductor, 14 - Silicone rubber insulation layer, 15 - Polyether polyurethane inner sheath layer, 16 - Kevlar fiber inner braided layer, 17 - Stainless-steel wire armor layer, 18 - Kevlar fiber outer braided layer, 19 - Polyether polyurethane outer sheath layer. SPECIFIC EMBODIMENTS

[0022] The terms used in the embodiments part of the present application are only for explaining the specific embodiments of the present application and are not intended to limit the present application. The following will describe the embodiments of the present application in detail with reference to the drawings.

[0023] See Figure 1 , the steel-core copper conductor stainless-steel wire armored steel ladle vehicle combined cable of the embodiment of the present application includes three power cores 1 and one control core 2 circumferentially and evenly distributed at 90-degree intervals through the X-shaped polyurethane elastomer isolation core 3. Further, the cross-section of the power core 1 is 4 mm 2 to 120 mm 2 , the cross-section of the control core 2 is 2.5 mm 2 to 10 mm 2The free ends of the four bifurcated partitions 4 of the X-shaped polyurethane elastomer isolation core 3 extend outwardly and expand to form a fan-shaped portion 5. A central hole 6 is provided in the central portion of the X-shaped polyurethane elastomer isolation core 3. A galvanized steel wire reinforcing core 7 is sleeved in the central hole 6, and the central hole 6 is filled with insulating lubricating silicone grease. Specifically, the galvanized steel wire reinforcing core 7 is formed by stranding a plurality of galvanized steel wires, and the wire diameter of the galvanized steel wire is 0.5 mm to 2 mm.

[0024] The power core 1 includes a power core conductor 8, an ethylene propylene diene monomer (EPDM) isolation layer 9, and a nitrile polyvinyl chloride insulation layer 10. The power core conductor 8 includes a stainless steel stranded wire inner core, and a plurality of tinned copper strands are stranded around the outside of the stainless steel stranded wire inner core to form a tinned copper strand conductor layer in two to three layers. Further, the tinned copper strands are formed by re-stranding a plurality of tinned copper stranded wires, and the tinned copper stranded wires are formed by stranding a plurality of tinned copper single wires with a diameter of 0.02 mm to 0.1 mm. The control core 2 includes three insulated cores 11 stranded together to form a core body, and a nitrile polyvinyl chloride sheath layer 12 is coated on the outside of the core body. The insulated core 11 includes an inner conductor 13 and a silicone rubber insulation layer 14. Specifically, the inner conductor 13 is formed by stranding a plurality of tinned copper single wires with a diameter of 0.05 mm to 0.08 mm.

[0025] The outside of the X-shaped polyurethane elastomer isolation core 3 is sequentially coated with a polyether polyurethane inner sheath layer 15, a Kevlar fiber inner braided layer 16, a stainless steel wire armor layer 17, a Kevlar fiber outer braided layer 18, and a polyether polyurethane outer sheath layer 19. Further, thermoplastic EVA adhesive layers are provided on the outer surface of the polyether polyurethane inner sheath layer 15 and the inner surface of the polyether polyurethane outer sheath layer 19. In one embodiment, both the Kevlar fiber inner braided layer 16 and the Kevlar fiber outer braided layer 18 are a structure in which the inner and outer double layers of Kevlar wires are wound in reverse spirals, and the braiding density is not less than 95%. In one embodiment, the stainless steel wire armor layer 17 is a structure of an inner and outer double-layer stainless steel wire plain weave net. The inner-layer stainless steel wire plain weave net is formed by weaving fine stainless steel wires, and the outer-layer stainless steel wire plain weave net is formed by weaving thick stainless steel wires. The thick stainless steel wires are 2 to 5 times the wire diameter of the fine stainless steel wires. Further, the braiding density of the inner-layer stainless steel wire plain weave net is greater than that of the outer-layer stainless steel wire plain weave net.

[0026] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit it. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application.

Claims

1. A combined cable for steel ladle cars with a steel core copper conductor and stainless steel wire armor, characterized in that: It includes three power cores (1) and one control core (2) which are circumferentially and evenly distributed at 90-degree intervals through an X-shaped polyurethane elastomer isolation core (3). The free ends of the four bifurcated partitions (4) of the X-shaped polyurethane elastomer isolation core (3) extend outwardly and expand to form a fan-shaped part (5). A central hole (6) is provided in the central part of the X-shaped polyurethane elastomer isolation core (3), and a galvanized steel wire strengthening core (7) is sleeved in the central hole (6). The power core (1) includes a power core conductor (8), an ethylene propylene diene monomer rubber isolation layer (9), and a nitrile polyvinyl chloride insulation layer (10). The power core conductor (8) includes a stainless steel stranded wire inner core, and a number of tinned copper strands are stranded around the outside of the stainless steel stranded wire inner core to form a tinned copper strand conductor layer in two to three layers. The control core (2) includes three insulated cores (11) which are jointly stranded to form a core body, and a nitrile polyvinyl chloride sheath layer (12) is coated on the outside of the core body. The insulated core (11) includes an inner conductor (13) and a silicone rubber insulation layer (14). An ether polyurethane inner sheath layer (15), a Kevlar fiber inner braided layer (16), a stainless steel wire armor layer (17), a Kevlar fiber outer braided layer (18), and an ether polyurethane outer sheath layer (19) are successively coated on the outside of the X-shaped polyurethane elastomer isolation core (3).

2. The combined cable for a steel ladle car with a steel core copper conductor and stainless steel wire armor according to claim 1, characterized in that: The tinned copper strands are formed by multiple-strand stranding of a number of tinned copper stranded wires, and the tinned copper stranded wires are formed by stranding a number of tinned copper single wires with a diameter of 0.02 mm to 0.1 mm.

3. The combined cable for steel ladle cars with a steel core copper conductor and a stainless steel wire armor according to claim 1, characterized in that: The inner conductor (13) is formed by stranding a number of tinned copper single wires with a diameter of 0.05 mm to 0.08 mm.

4. The combined cable for a steel ladle car with a steel core copper conductor and a stainless steel wire armor according to claim 1, characterized in that: The galvanized steel wire strengthening core (7) is formed by stranding a number of galvanized steel wires, and the wire diameter of the galvanized steel wires is 0.5 mm to 2 mm.

5. The combined cable for steel ladle cars with a steel core copper conductor and stainless steel wire armor according to claim 1, characterized in that: The central hole (6) is filled with insulating lubricating silicone grease.

6. The combined cable for steel ladle cars with a steel core copper conductor and stainless steel wire armor according to claim 1, characterized in that: The stainless steel wire armor layer (17) is a double-layer inner and outer stainless steel wire plain woven mesh structure. The inner stainless steel wire plain woven mesh is formed by weaving fine stainless steel wires, and the outer stainless steel wire plain woven mesh is formed by weaving thick stainless steel wires. The thick stainless steel wires are 2 to 5 times the wire diameter of the fine stainless steel wires.

7. The combined cable for steel ladle cars with a steel core copper conductor and stainless steel wire armor according to claim 6, characterized in that: The weaving density of the inner stainless steel wire plain woven mesh is greater than that of the outer stainless steel wire plain woven mesh.

8. The combined cable for a steel ladle car with a steel core copper conductor and stainless steel wire armor according to claim 1, characterized in that: The cross-sectional area of the power core wire (1) is 4 mm 2 to 120 mm 2 , and the cross-sectional area of the control core wire (2) is 2.5 mm 2 to 10 mm 2 .

9. The combined cable for steel ladle cars with a steel core copper conductor and stainless steel wire armor according to claim 1, characterized in that: Both the Kevlar fiber inner braided layer (16) and the Kevlar fiber outer braided layer (18) are double-layer inner and outer Kevlar wire reverse spiral winding braided structures, and the braiding density is not less than 95%.

10. The combined cable for a steel ladle car with a steel core copper conductor and stainless steel wire armor according to claim 1, characterized in that: Thermoplastic EVA adhesive layers are provided on the outer surface of the ether polyurethane inner sheath layer (15) and the inner surface of the ether polyurethane outer sheath layer (19).

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