High-temperature-resistant cable special for crane crane

Abstract

The high-temperature-resistant cable special for the crane crane is characterized by comprising three power line units, a ground line unit, a filling rope, a wrapping tape, an inner sheath, a steel wire braided reinforcing layer and an outer sheath, the silicone rubber material is adopted as the insulating material of the power line and is matched with the steel wire braided reinforcing layer with high braiding density, so that insulation ablation penetration can be effectively avoided at extremely high temperature, the frictional resistance between the insulating layers can be effectively reduced when the cable is bent and moved, cable bulging and conductor core breakage are avoided, and the service life of the cable is prolonged. The service life of the cable in a high-temperature environment can be effectively prolonged, and the problems of sheath ablation and core breakage are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a high-temperature resistant cable special for lifting cranes. Background Art

[0002] In the smelting industry, materials, semi-finished products and finished products are generally transported by large-scale lifting cranes. The cranes are generally located above the high-temperature working area of the smelting. During the metal smelting process, the temperature of the molten metal liquid can reach over 1000°C. During the crane transportation process, the splashing of molten metal liquid poses a direct threat to the cables accompanying the crane. In mild cases, the surface of the cable sheath is scalded and causes the surface of the sheath to catch fire, forming burn marks. In severe cases, the insulation is damaged and the power line is short-circuited. In addition, the high temperature environment causes the insulated wire core to stick together, affecting the bending movement of the accompanying cable and causing the cable to bulge and the conductor to break. Therefore, the cable supporting this type of crane usually needs to be replaced in less than a month, seriously affecting the continuous production of the factory. Summary of the Invention

[0003] The utility model aims to solve the problems mentioned in the background technology and provides a high-temperature resistant cable for lifting cranes, which can effectively improve the service life of the cable in a high-temperature environment and reduce the problems of sheath burning and core breaking.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A high-temperature resistant crane cable, comprising three power line units, one ground line unit, a filling rope, a wrapping tape, an inner sheath, a steel wire braided reinforcement layer, and an outer sheath; the ground line unit and the power line unit are twisted together to form a three-phase four-wire cable core assembly;

[0006] Each of the power line units comprises a power line conductor and a power line insulation layer, wherein the power line conductor is a Class 5 annealed tinned soft copper conductor, which is bundled and twisted together, and the power line insulation layer is made of a silicone rubber elastomer insulation material;

[0007] The ground wire unit includes a ground wire conductor and a ground wire insulation layer. The ground wire conductor is formed by twisting a plurality of tinned copper conductors. The ground wire insulation layer is made of a silicone rubber elastomer insulation material.

[0008] The gap between the ground line unit and the power line unit is provided with the filling rope for supporting and filling the cable core assembly into a round shape;

[0009] The wrapping tape is a layer of high-temperature resistant soft non-woven fabric wrapped around the cable core assembly, with a thickness of 0.038mm and a wrapping overlap rate of greater than or equal to 20%. The outer surface of the wrapping tape is coated with a hot-melt material film layer, which can be bonded to the inner sheath at high temperatures.

[0010] The inner sheath is wrapped around the outside of the wrapping tape and is made of silicone material; the steel wire braided reinforcement layer is woven from galvanized steel wire using a 24-spindle or 36-spindle metal braiding machine and is wrapped around the inner sheath. The steel wire diameter is 0.15mm-0.25mm, and the braiding density is greater than or equal to 90%; the outer sheath is extruded on the steel wire braided reinforcement layer, and the surface of the outer sheath is coated with a red marking color layer for easy distinction.

[0011] A further solution is: in order to reduce the axial friction resistance between the outer surfaces of the insulation layers, which causes the cable to bulge and break the conductor when it bends, a talcum powder layer is provided on the outer surfaces of the power line insulation layer and the ground wire insulation layer.

[0012] The beneficial effects of the present invention are: using silicone rubber material as the insulation material of the power line in combination with a high-density steel wire braided reinforcement layer can effectively prevent insulation ablation and penetration at extremely high temperatures, and can effectively reduce the friction resistance between the insulation layers when the cable is bent and moved, avoiding cable bulging and conductor core breakage, and can effectively increase the service life of the cable in high-temperature environments and reduce the problems of sheath ablation and core breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Example

[0015] As shown in the figure, a high-temperature resistant crane cable includes three power line units, one ground line unit, a filling rope 3, a wrapping tape 4, an inner sheath 5, a steel wire braided reinforcement layer 6, and an outer sheath 7. The ground line unit and the power line unit are twisted together to form a three-phase four-wire cable core assembly.

[0016] Each of the power line units comprises a power line conductor 11 and a power line insulation layer 12. The power line conductor 11 is a Class 5 annealed tinned soft copper conductor, which is bundled and twisted together. The power line insulation layer 12 is made of a silicone rubber elastomer insulation material.

[0017] The ground wire unit includes a ground wire conductor 21 and a ground wire insulation layer 22. The ground wire conductor 21 is formed by twisting a plurality of tinned copper conductors. The ground wire insulation layer 22 is made of a silicone rubber elastomer insulation material.

[0018] The gap between the ground line unit and the power line unit is provided with the filling rope 3 for supporting and filling the cable core assembly into a round shape;

[0019] The wrapping tape 4 is a layer of high-temperature resistant soft non-woven fabric wrapped around the cable core assembly, with a thickness of 0.038 mm and a wrapping overlap rate greater than or equal to 20%. The outer surface of the wrapping tape 4 is coated with a hot-melt material film layer, which can be bonded to the inner sheath 5 on its outer side at high temperatures;

[0020] The inner sheath 5 is wrapped around the outside of the wrapping tape 4 and is made of silicone material; the steel wire braided reinforcement layer 6 is woven from galvanized steel wire and woven using a 24-spindle or 36-spindle metal braiding machine, and is wrapped around the inner sheath 5. The steel wire diameter is 0.15mm-0.25mm, and the braiding density is greater than or equal to 90%; the outer sheath 7 is extruded on the steel wire braided reinforcement layer 6, and the surface of the outer sheath 7 is coated with a red marking color layer for easy observation and distinction.

[0021] A further solution is: in order to reduce the axial friction resistance between the outer surfaces of the insulation layers, which causes the cable to move in bending and thus cause the cable to bulge and the conductor to break, a talcum powder layer 8 is provided on the outer surfaces of the power line insulation layer 12 and the ground wire insulation layer 22.

Claims

1. A high-temperature resistant crane cable, comprising three power line units, one ground line unit, a filler rope, a wrapping tape, an inner sheath, a steel wire braided reinforcement layer, and an outer sheath; The ground wire unit and the power wire unit are twisted together to form a three-phase four-wire cable core assembly; each power wire unit includes a power wire conductor and a power wire insulation layer, the power wire conductor is a Class 5 annealed tinned soft copper conductor, which is bundled and twisted together, and the power wire insulation layer is made of silicone rubber elastomer insulation material; the ground wire unit includes a ground wire conductor and a ground wire insulation layer, the ground wire conductor is formed by twisting a plurality of tinned copper conductors together, and the ground wire insulation layer is made of silicone rubber elastomer insulation material; the gap between the ground wire unit and the power wire unit is provided with the filling rope for supporting and filling the cable core assembly; The wrapping tape is a layer of high-temperature resistant soft non-woven fabric wrapped around the cable core assembly, with a thickness of 0.038mm and a wrapping overlap rate greater than or equal to 20%. The outer surface of the wrapping tape is coated with a hot-melt material film layer; the inner sheath is wrapped around the outside of the wrapping tape and is made of silicone material; the steel wire braided reinforcement layer is woven from galvanized steel wire and woven using a 24-spindle or 36-spindle metal braiding machine, and is wrapped on the inner sheath. The steel wire diameter is 0.15mm-0.25mm, and the braiding density is greater than or equal to 90%; the outer sheath is extruded on the steel wire braided reinforcement layer, and the surface of the outer sheath is coated with a red marking color layer.

2. A high temperature resistant crane cable as claimed in claim 1, characterized in that Talc powder layers are provided on the outer surfaces of the power line insulation layer and the ground line insulation layer.

Images