CN-121306660-B - High-strength copper core crosslinked polyethylene insulation overhead power cable

CN121306660BCN 121306660 BCN121306660 BCN 121306660BCN-121306660-B

Abstract

The invention relates to the technical field of power cables and provides a high-strength copper core crosslinked polyethylene insulated overhead power cable which comprises a conductor, a shielding layer, a crosslinked polyethylene insulating layer and a sheath layer, wherein the conductor is formed by twisting a plurality of wires, the shielding layer is arranged outside the conductor in a coating mode, the crosslinked polyethylene insulating layer is arranged outside the shielding layer in a coating mode, the sheath layer is arranged outside the crosslinked polyethylene insulating layer in a coating mode, the high-strength copper core crosslinked polyethylene insulated overhead power cable further comprises a tensile layer, positioning components, the tensile layer, the tensile components and the turbulent flow components are arranged between the crosslinked polyethylene insulating layer and the sheath layer in an equidistant mode, the tensile components are arranged between each two positioning components, and the turbulent flow components are arranged on the tensile components.

Inventors

LI HONGLIANG
WANG YANXING
WANG ZHICHONG
WANG YANHUI
WANG PANPAN
LI ZIYE

Assignees

石家庄市金世纪电缆有限公司

Dates

Publication Date: 20260505
Application Date: 20251017

Claims (5)

1. The utility model provides a high strength copper core crosslinked polyethylene insulation overhead power cable, includes conductor (1), shielding layer (2), crosslinked polyethylene insulating layer (3) and restrictive coating (4), conductor (1) are stranded by a plurality of wires and are formed, shielding layer (2) cladding sets up outside conductor (1), crosslinked polyethylene insulating layer (3) cladding sets up shielding layer (2) outside, restrictive coating (4) cladding sets up outside crosslinked polyethylene insulating layer (3), its characterized in that still includes: A tensile layer (5), wherein the tensile layer (5) is arranged between the crosslinked polyethylene insulating layer (3) and the sheath layer (4); The outer part of the sheath layer (4) is equidistantly provided with a plurality of positioning assemblies which are used for fixing the cable on the power transmission tower; The tensile assembly is arranged between every two positioning assemblies, and two ends of the tensile assembly are respectively connected with the positioning assemblies and used for tensioning cables; The turbulence assembly is arranged on the tensile assembly and used for dispersing wind acting on the cable; The positioning assembly includes: The locating frames (7) are arranged outside the sheath layer (4) at equal intervals, and a plurality of locating frames (7) are arranged outside the sheath layer; the positioning frames (7) are split, arc-shaped positioning pads (8) are arranged in each positioning frame (7), and the arc-shaped positioning pads (8) are abutted to the sheath layer (4); The tension assembly includes: A group of fixing frames (9) are arranged between every two adjacent positioning frames (7), a plurality of fixing frames (9) are arranged at equal distances, the inner side of each fixing frame (9) is abutted with the sheath layer (4), and a plurality of mounting holes (10) are formed in the outer side of each fixing frame (9) in a circumferential shape at equal angles; wherein the fixing frame (9) is split; The anti-pulling ropes (11) are arranged outside the fixing frames (9), a group of anti-pulling ropes (11) are arranged outside the fixing frames (9), a plurality of anti-pulling ropes (11) are arranged at equal angles in a circumferential shape, a plurality of mounting holes (10) on each fixing frame (9) are in one-to-one correspondence with a plurality of anti-pulling ropes (11), and the anti-pulling ropes (11) are in contact with the inner walls of the mounting holes (10); The locking parts are arranged at the end parts of each group of the tensile ropes (11) and are used for fixing the tensile ropes (11); The locking portion includes: the locking frames (12) are arranged at the two ends of each tensile rope (11), and the locking frames (12) are fixedly connected with the corresponding positioning frames (7) respectively; wherein, one end of each tensile rope (11) positioned in the locking frame (12) is provided with a bending area; The bending frames (13) are slidably arranged in each locking frame (12), the bending frames (13) are positioned in bending areas of the tensile ropes (11), and the bending frames (13) are abutted to the tensile ropes (11); the fastening frames (14) are slidably arranged in the locking frames (12), and the fastening frames (14) are abutted with the tensile ropes (11); locking members are mounted on top of each locking frame (12) for fixing the position of the fastening frame (14).
2. The high-strength copper core crosslinked polyethylene insulated overhead power cable according to claim 1, wherein a plurality of raised strips (6) are arranged outside the sheath layer (4), the raised strips (6) are arranged at equal angles in a circumferential shape outside the sheath layer (4), and the raised strips (6) are arranged in parallel with the axis of the conductor (1).
3. A high strength copper core cross-linked polyethylene insulated overhead power cable according to claim 2, wherein the locking member comprises nuts (15) and screws (16), the nuts (15) are fixedly mounted on the top of each locking frame (12), the screws (16) are mounted in the nuts (15) in a threaded manner, and a plurality of the screws (16) are respectively in one-to-one correspondence and rotary connection with a plurality of the fastening frames (14).
4. A high strength copper core crosslinked polyethylene insulated overhead power cable according to claim 3, wherein said spoiler assembly comprises: a plurality of groups of rotating sleeves (17) are arranged between every two adjacent fixing frames (9), the groups of rotating sleeves (17) are respectively in one-to-one correspondence with the plurality of anti-pulling ropes (11), and the groups of rotating sleeves (17) are respectively sleeved on the corresponding anti-pulling ropes (11); wherein, each group of the rotating sleeves (17) is provided with a plurality of rotating sleeves at equal distances.
5. A high strength copper core crosslinked polyethylene insulated overhead power cable according to claim 4, wherein each of said rotating jackets (17) is provided with a helical air deflector (18).

Description

High-strength copper core crosslinked polyethylene insulation overhead power cable Technical Field The invention relates to the technical field of power cables, in particular to a high-strength copper core crosslinked polyethylene insulation overhead power cable. Background The overhead cable is a special cable which is provided with an insulating layer and a protective sheath and is manufactured by adopting a production process similar to a cross-linked cable, is a new transmission mode between the overhead cable and an underground cable, is a single core, and can be divided into a hard aluminum wire structure, a hard drawn copper wire structure, an aluminum alloy wire structure, a steel core or aluminum alloy core supporting structure, a self-supporting three-core stranding structure and the like according to different structures, wherein the hard drawn copper wire structure is heavy, but has high tensile force and strong capability of resisting external force, and even the cable can still be electrified continuously when a pole tower is broken. With the continuous development of power systems, more and more power transmission lines are put into use, in the power systems, cables are generally erected on an iron tower, and strain towers and tangent towers in the iron tower are two common power transmission tower types, wherein the strain towers, also called as bearing towers or terminal towers, mainly function to bear the tension of wires and are generally applied to key nodes of the power lines, such as corners, branches, terminals and the like, compared with the strain towers, the tangent towers are simpler in structure and mainly used for straight sections of the power lines, and have the functions of supporting the wires and keeping the straight line state of the lines, that is, one cable needs to be supported by a plurality of power transmission towers. In the application process of the overhead cable, the power cable is easy to appear galloping due to the influence of natural disasters or the occurrence of overlarge current-carrying capacity and the like, the vibration amplitude of the power cable can be increased by galloping, and tension is applied to the cable, so that the installation positions of the overhead cable and a power transmission tower are caused, and the sheaths of the cable and the like are easy to be damaged due to overlarge tension, so that the stable operation of a power system is influenced. Disclosure of Invention The invention provides a high-strength copper core crosslinked polyethylene insulated overhead power cable, which is used for solving the problems that the cable is easy to appear galloping due to weather influence in the prior art, so that the cable is easy to damage due to excessive vibration or tension, and the running stability of a power system is further influenced. The technical scheme of the invention is as follows: The utility model provides a high strength copper core crosslinked polyethylene insulation overhead power cable, includes conductor, shielding layer, crosslinked polyethylene insulating layer and restrictive coating, the conductor is formed by a plurality of wires transposition, the shielding layer cladding sets up outside the conductor, crosslinked polyethylene insulating layer cladding sets up outside the shielding layer, the restrictive coating cladding sets up outside the crosslinked polyethylene insulating layer, still include: The tensile layer is arranged between the crosslinked polyethylene insulating layer and the sheath layer; The positioning assemblies are arranged outside the sheath layer at equal intervals and are used for fixing the cable on the power transmission tower; The tensile assembly is arranged between every two positioning assemblies, and two ends of the tensile assembly are respectively connected with the positioning assemblies and used for tensioning cables; and the turbulence assembly is arranged on the tensile assembly and used for dispersing wind acting on the cable. On the basis of the scheme, the outer portion of the sheath layer is provided with a plurality of raised strips, the raised strips are arranged at equal angles in a circumferential shape outside the sheath layer, and the raised strips are all arranged in parallel with the axis of the conductor. On the basis of the scheme, the positioning assembly comprises: The outer part of the sheath layer is provided with a plurality of positioning frames at equal distance; Wherein, the locating rack sets up to split type, every the locating rack is inside all to be provided with the arc location pad, the arc location pad with restrictive coating butt. In addition to the foregoing, the tension assembly includes: A group of fixing frames are arranged between every two adjacent positioning frames, a plurality of fixing frames are arranged at equal distances, the inner side of each fixing frame is abutted to the sheath layer, and a plurality of mounting holes are formed in t