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CN-121237506-B - Environment-friendly flame-retardant medium-voltage cable

CN121237506BCN 121237506 BCN121237506 BCN 121237506BCN-121237506-B

Abstract

The invention discloses an environment-friendly flame-retardant medium-voltage cable, which relates to the technical field of cables, wherein a flame-retardant protection component is arranged on the outer side of an inner conductor, the flame-retardant protection component comprises flame-retardant filling bodies, supporting grooves are formed in the middle parts of opposite side surfaces of adjacent flame-retardant filling bodies, arc-shaped spring plates are adhered to the inside of the supporting grooves, aluminum hydroxide bags are filled in reinforced braided tubes, heat-conducting silica gel is wrapped on the outer side of a heating wire, a replacement impurity-removing component is arranged on the outer side of an outer protection film.

Inventors

  • XU PENG
  • LI LIN
  • NING YUANYUAN
  • LIU LITING

Assignees

  • 亚星线缆集团有限公司

Dates

Publication Date
20260505
Application Date
20251114

Claims (8)

  1. 1. An environment-friendly flame-retardant medium-voltage cable comprises an inner conductor (1), and is characterized in that a flame-retardant protection component (2) is arranged on the outer side of the inner conductor (1), and the flame-retardant protection component (2) comprises a flame-retardant filling body (201); The outer side of the inner conductor (1) is wrapped with a flame-retardant filling body (201), supporting grooves (202) are formed in the middle of opposite side surfaces of adjacent flame-retardant filling bodies (201), backing plates (203) are uniformly adhered to the inside of the supporting grooves (202), the two opposite backing plates (203) are respectively connected to two sides of an arc-shaped spring plate (204), and the arc-shaped spring plates (204) are adhered to the inside of the supporting grooves (202); A reinforced braided tube (205) is arranged among the three flame-retardant filling bodies (201), an aluminum hydroxide bag (206) is filled in the reinforced braided tube (205), a central supporting block (207) is uniformly sleeved on the outer side of the reinforced braided tube (205), and the opposite surfaces of the adjacent central supporting blocks (207) are respectively adhered to two ends of a connecting rubber block (208); The flame-retardant heat-conducting device is characterized in that the outer sides of the flame-retardant filling bodies (201) are wrapped with heat-conducting layers (209), heating grooves (210) are formed in the positions, close to gaps between the flame-retardant filling bodies (201), of the heat-conducting layers (209), heating wires (211) are inlaid in the heating grooves (210), and heat-conducting silica gel (212) is wrapped on the outer sides of the heating wires (211); Insulating middle layer (213) are wrapped up in heat conduction layer (209) outside, insulating middle layer (213) outside evenly distributed has parting bead (214), evenly embedded install between parting bead (214) and aerify strip (215), parting bead (214) outside parcel has outer insulating layer (216), outer insulating layer (216) outside parcel has outer protection film (217).
  2. 2. An environment-friendly flame-retardant medium voltage cable according to claim 1, wherein the end face of the flame-retardant filler (201) is one third of a semicircle, and three flame-retardant fillers (201) are combined into a cylinder.
  3. 3. The environment-friendly flame-retardant medium voltage cable as claimed in claim 1, wherein the end surfaces of the central supporting block (207) and the connecting rubber block (208) are the same in shape, the flame-retardant filling body (201) is provided with a heat conducting groove (218) close to the central supporting block (207), and the end part of the central supporting block (207) is in contact with the outer side of the inner conductor (1).
  4. 4. The environment-friendly flame-retardant medium voltage cable as claimed in claim 1, wherein the outer side of the flame-retardant filling body (201) is provided with a groove corresponding to the heating groove (210), and one side of the heat-conducting silica gel (212) close to the insulating middle layer (213) is a curved surface.
  5. 5. An environment-friendly flame-retardant medium voltage cable according to claim 1, wherein a replacement impurity removal component (3) is arranged on the outer side of the outer protective film (217), and the replacement impurity removal component (3) comprises a replacement semicircular shovel (301); The outer side of the outer protective film (217) is symmetrically sleeved with a replacement semicircular shovel (301), one end of the replacement semicircular shovel (301) is welded with a guide edge (302), one end, far away from the replacement semicircular shovel (301), of the guide edge (302) is provided with a rolling groove (303), and a rolling rod (304) is uniformly rotationally inlaid in the rolling groove (303); The end part of the guide edge (302) is symmetrically provided with a connecting buffer groove (305), a blind pipe (307) is movably embedded in the connecting buffer groove (305), a connecting end block (309) is arranged between two blind pipes (307) which are fixedly connected with the two ends of a connecting spring (308) respectively at one end of the blind pipe (307) and the other end of the connecting buffer groove (305), and the two connecting end blocks (309) which are positioned at the same height are welded at the two ends of a transmission connecting rod (310) respectively; arc-shaped reinforcing rods (311) are symmetrically welded in the middle of the transmission connecting rod (310), and splicing hook plates (312) are welded at two ends of each arc-shaped reinforcing rod (311).
  6. 6. The environment-friendly flame-retardant medium voltage cable as claimed in claim 5, wherein the replacing semicircular shovel (301) is of a semicircular cylindrical structure with one end rounded, the inner diameter of the replacing semicircular shovel (301) is equal to the outer diameter of the outer protective film (217), and the inner side of the replacing semicircular shovel (301) is of a smooth curved surface.
  7. 7. The environment-friendly flame-retardant medium voltage cable as claimed in claim 5, wherein the end face of the connecting end block (309) is of a T shape, clamping holes (313) are symmetrically formed in one end of the blind pipe (307), clamping rods (314) are welded at positions, corresponding to the clamping holes (313), of the connecting end block (309), connecting screws (315) are installed at positions, close to the clamping rods (314), of the connecting end block (309) in a penetrating mode, and the connecting screws (315) are connected with the blind pipe (307) through threads.
  8. 8. The environment-friendly flame-retardant medium voltage cable as claimed in claim 5, wherein the thickness of the arc-shaped reinforcing rod (311) is twice that of the splicing hook plates (312), and two splicing hook plates (312) positioned on the same arc-shaped reinforcing rod (311) are distributed in a staggered manner.

Description

Environment-friendly flame-retardant medium-voltage cable Technical Field The invention relates to the technical field of cables, in particular to an environment-friendly flame-retardant medium-voltage cable. Background The medium-voltage cable is key equipment of a power transmission system, the typical voltage level of ‌ is 6-35kV ‌, the medium-voltage cable is mainly used for urban power distribution, industrial power supply and other scenes, the core number of the medium-voltage cable is determined according to the type, load characteristics and use scenes of the power supply system, three cores, four cores and five cores are common, and the environment-friendly cable is a cable product which is made of environment-friendly materials, accords with the safety standard and has small influence on the environment and is mainly used for electric energy transmission and signal processing. But environmental protection type medium voltage cable in the present market is because of the service environment is complicated, and inner structure is compact, and shock resistance is poor, can often lead to outer insulating layer to break because of external collision or extrusion in laying and use, and freeze easily in the chilly environment and lead to the insulating layer to damage, and the subsequent safety problem such as fire is triggered easily when using. Disclosure of Invention The invention provides an environment-friendly flame-retardant medium-voltage cable, which can effectively solve the safety problems that the environment-friendly medium-voltage cable provided in the background art is complex in use environment, compact in internal structure and poor in impact resistance, an external insulating layer is broken due to external collision or extrusion in the paving and use processes, the insulating layer is damaged due to easy icing in a cold environment, and fire and the like are easy to cause in subsequent use. In order to achieve the aim, the invention provides the technical scheme that the environment-friendly flame-retardant medium-voltage cable comprises an inner conductor, wherein a flame-retardant protection component is arranged on the outer side of the inner conductor, and the flame-retardant protection component comprises a flame-retardant filling body; The outer side of the inner conductor is wrapped with a flame-retardant filling body, the middle parts of the opposite side surfaces of the adjacent flame-retardant filling bodies are respectively provided with a supporting groove, the inside of each supporting groove is uniformly adhered with a base plate, the two opposite base plates are respectively connected with two sides of an arc-shaped spring plate, and the arc-shaped spring plates are adhered to the inside of each supporting groove; The reinforced braided tube is arranged between the three flame-retardant filling bodies, aluminum hydroxide bags are filled in the reinforced braided tube, central supporting blocks are uniformly sleeved on the outer sides of the reinforced braided tube, and the opposite surfaces of the adjacent central supporting blocks are respectively adhered to two ends of the connecting rubber blocks. According to the technical scheme, the heat conduction layers are wrapped outside the flame-retardant filling bodies, the heat conduction layers are provided with the heating grooves close to gaps among the flame-retardant filling bodies, heating wires are embedded inside the heating grooves, and the heat conduction silica gel is wrapped outside the heating wires. According to the technical scheme, the heat conduction layer outside parcel has insulating middle layer, insulating middle layer outside evenly distributed has the spacer bar, evenly embedded installs the strip of aerifing between the spacer bar, the spacer bar outside parcel has outer insulating layer, outer insulating layer outside parcel has outer protection film. According to the technical scheme, the end face of the flame-retardant filling body is one third of a semicircle, and the three flame-retardant filling bodies are combined into a cylinder. According to the technical scheme, the end faces of the central supporting block and the connecting rubber block are identical in shape, the flame-retardant filling body is provided with a heat conducting groove close to the central supporting block, and the end part of the central supporting block is in contact with the outer side of the inner conductor. According to the technical scheme, the outer side of the flame-retardant filling body is provided with the groove corresponding to the heating groove, and one side of the heat-conducting silica gel, which is close to the insulating middle layer, is a curved surface. According to the technical scheme, the outer side of the outer protective film is provided with the replacement impurity removal component, and the replacement impurity removal component comprises a replacement semicircular shovel; the outer side of the