CN218633267U

CN218633267U - Six-loop tower overhead line cable down-leading structure

Info

Publication number: CN218633267U
Application number: CN202222525958.5U
Authority: CN
Inventors: 赵路; 王日恒; 赵浩; 葛永欣; 章婉彤; 许栋梁; 张倩倩
Original assignee: Fujian Yongfu Power Engineering Co Ltd
Current assignee: Fujian Yongfu Power Engineering Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-03-14
Anticipated expiration: 2032-09-23

Abstract

The utility model relates to a six-loop tower overhead line cable leading-down structure, wherein each cross arm of two lead cross arms on a tower is provided with one lead hanging point, and each cross arm of the lower four lead cross arms is provided with two lead hanging points, so that eighteen lead hanging points of six loops are formed; the length of the ground wire cross arm is greater than that of the lower wire cross arm, three vertical downleads are arranged on the left side and the right side of the ground wire cross arm, wires of wire hanging points of the upper two wire cross arms are oppositely pulled by adopting a strain insulator string and are respectively led down to the corresponding downleads, the upper wires are led down by utilizing the overhead side tower body for the lower two loops of the lower four wire cross arms, the upper wires are oppositely pulled to a terminal platform by adopting the strain insulator string, the upper two loops of the lower four wire cross arms are jumped to the cable side after adopting a jumper, then the cross arm insulators are led down to the cable side of the lowest cross arm, and then the strain insulator is oppositely pulled to the terminal platform. The wire is directly pulled down by adopting a strain insulator string pair without bending the wire, and the check is convenient for direct pull-down.

Description

Six-loop tower overhead line cable down-leading structure

Technical Field

The utility model relates to a six return circuit tower overhead line cables draw down structure relates to six return circuit tower empty line cables and draws down the field.

Background

The overhead transmission line and the cable transmission line are two important components of the power transmission network, the terminal tower is a key part for the connection of the overhead line and the cable line, and the overhead line and the cable line are converted at the terminal tower through a cable terminal.

The design of the existing terminal tower adopts a dry-shaped tower, in order to ensure that the jumper wire and an iron tower iron piece keep enough electric clearance, a composite cross arm insulator is additionally arranged at the iron tower and an iron tower cross arm for keeping the safety distance between a down-lead wire and the tower, the up-lead wire is led down to a cable terminal head through the continuous jumper wire and then converted into a cable to enter the ground, and a cable line can better adapt to the requirement of urban area planning development.

The prior art has the following defects:

1. in the prior art, four-loop overhead lines are led down at most from one base terminal tower, and if the tower is arranged in six loops, two terminal towers need to be built, so that the requirement of a city land shortage area is difficult to meet.

2. Because the 'dry' shaped pole tower has small space on the pole, the installation of an electrical gap and a cross arm insulator is not facilitated.

SUMMERY OF THE UTILITY MODEL

In view of the deficiencies of the prior art, the utility model aims to solve the technical problem that a six-loop tower overhead line cable draws down structure is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: a six-loop tower overhead line cable down-leading structure comprises a T-shaped tower, wherein a ground wire cross arm, an upper two-circuit wire cross arm, a lower four-circuit wire cross arm and a terminal platform are sequentially arranged on the tower from top to bottom, each cross arm of the upper two-circuit wire cross arm is provided with a wire hanging point, each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points, and eighteen wire hanging points in total of six loops are formed; the length of the ground wire cross arm is larger than that of the lower wire cross arm, three vertical down-leading wires are arranged on the left side and the right side of the ground wire cross arm, wires of wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulator strings and are respectively led to the corresponding down-leading wires, the lower two loops of the lower four wire cross arms are led to the upper wire by utilizing the tower body on the overhead side, the upper wire is oppositely pulled to the terminal platform by adopting the strain insulator strings, the upper two loops of the lower four wire cross arms are jumped to the cable side by adopting a jumper wire, then the upper two loops of the lower four wire cross arms are led to the cable side of the lowermost cross arm by adopting the cross arm insulators, and then the strain insulator strings are oppositely pulled to the terminal platform.

Preferably, the tower is provided with two terminal platforms on the size side of the cable terminal tower, and the left side surface and the right side surface are provided with one terminal platform respectively.

Preferably, the left end side of the ground wire cross arm exceeds the left end side of the lower wire cross arm, the right end side of the ground wire cross arm exceeds the right end side of the lower wire cross arm, and the length of the ground wire cross arm meets the requirement of an electric gap for leading down the wire.

Preferably, the wires of the wire hanging points of the two upper wire cross arms sequentially pass through the strain insulator string and the duplex jumper wire composite insulator string and are turned to be in a vertically downward direction from the horizontal direction, and finally are connected with the corresponding downlead through the lower guide wire, the top end of the downlead is connected with the ground wire cross arm through the strain insulator string, and the bottom end of the downlead is connected with the terminal connecting terminal through the strain insulator string.

Compared with the prior art, the utility model discloses following beneficial effect has: the wire pull-down hanging points are added after the ground wire cross arm is lengthened, so that the two loop hanging points of the upper cross arm are located above the cable terminal, the wires can be directly pulled down by adopting strain insulator strings, direct pulling-down is realized due to no wire bending, the electrical verification is convenient, the insulator hanging points are all located on the ground wire cross arm, the processing is convenient, and the construction is also convenient. Secondly, because of the wire direct down-lead, by the main atress of strain insulator string, do not have cross arm insulator fracture risk, and the type is simple, and the check-up is convenient. Finally, the construction is easy to understand and difficult to generate ambiguity due to simple type.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a front view of the embodiment of the present invention.

Fig. 2 is a side view of an embodiment of the present invention.

Fig. 3 is a schematic view of a partial structure according to an embodiment of the present invention.

Fig. 4 is a schematic view of a partial structure according to an embodiment of the present invention.

Fig. 5 is a schematic view of a partial structure according to an embodiment of the present invention.

Fig. 6 is a top view of the terminal platform according to the embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 6, this embodiment provides a six-loop tower overhead line cable drop structure, which includes a "T" -shaped tower 1, a ground wire cross arm 2, an upper two-loop wire cross arm 3, a lower four-loop wire cross arm 4, and a terminal platform 5 are sequentially arranged on the tower from top to bottom, each cross arm of the upper two-loop wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-loop wire cross arm is provided with two wire hanging points, so as to form eighteen wire hanging points of six loops; the length of the ground wire cross arm is greater than that of the lower wire cross arm, three vertical down leads 6 are arranged on the left side and the right side of the ground wire cross arm, the leads of the lead hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulator strings 7 and are respectively led down to the corresponding down leads, the lower two loops of the lower four wire cross arms are led down to the upper leads 8 by utilizing the overhead side tower body, the upper leads are oppositely pulled to a terminal platform (dotted parts in figures 3 and 4) by adopting the strain insulator strings, the upper two loops of the lower four wire cross arms are jumped to the cable side by adopting jumper wires 9, then the cross arm insulators are led down to the cable side of the lowest cross arm, and then the strain insulator strings are oppositely pulled to the terminal platform (double-point slide part in figure 4). The strain insulator string can bear large tension, 5 tons of tension are set to ensure that the wire is broken straight, and windage yaw is prevented.

The embodiment of the utility model provides an in, the shaft tower respectively sets up two terminal platforms in cable terminal tower size side, controls the side and respectively sets up a terminal platform.

In the embodiment of the present invention, the wire cross arms of the upper two-circuit wire cross arm and the lower four-circuit wire cross arm are arranged in a shape like a Chinese character 'gan'.

The embodiment of the utility model provides an in, the left end side of ground wire cross arm surpasss the left end side of below wire cross arm, and the right-hand member side of ground wire cross arm surpasss the right-hand member side of below wire cross arm, and ground wire cross arm length satisfies the electric clearance requirement that the wire draws down.

The embodiment of the utility model provides an in, the wire of the wire hanging point of two last wire cross arms truns into vertical downward direction through strain insulator string, pair wire jumper composite insulator string 10 in proper order, finally connects through lower guide line 11 and the downlead that corresponds, links together through T type wire clamp 12 between lower guide line and the downlead, and the downlead top is connected the ground wire cross arm through strain insulator string, and the downlead bottom is connected terminal binding post through strain insulator string.

A down-leading method of a six-loop tower overhead line cable down-leading structure is carried out according to the following steps: (1) The method comprises the following steps that an earth wire cross arm is lengthened to exceed the length of a lower wire cross arm, three vertical down leads are arranged on the left end side and the right end side of the earth wire cross arm, the top end of each down lead is connected with the earth wire cross arm through a strain insulator string, and the bottom end of each down lead is connected with a terminal connecting terminal through the strain insulator string; (2) Each cross arm of the upper two-circuit wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six circuits; (3) When the cable is down-led, the wires at the wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulators and are respectively led down to corresponding down-lead wires, the lower two loops of the lower four wire cross arms are used for leading down the upper wires by utilizing the tower body on the overhead side, the upper wires are oppositely pulled to the terminal platform by adopting the strain insulators, the upper two loops of the lower four wire cross arms are jumped to the cable side after adopting a jumper, then the upper wires are led down to the cable side of the lowest cross arm by adopting the cross arm insulators, and then the upper wires are oppositely pulled to the terminal platform by adopting the strain insulators.

The six-loop tower overhead line cable down-leading structure is mainly technically characterized in that a T-shaped ground wire cross arm is adopted, electrical clearance verification and tower body structure verification are comprehensively considered, upper cross arm two-loop down-leading insulator hanging points are completely arranged on a main tower body material, due to vertical down-leading, cross arm insulators are not required to be installed excessively, the number of the insulators is reduced, only the down-leading conductor projection surface clearance needs to be controlled, the verification is convenient and fast, errors are not prone to occurring, construction is easy, and the number of cable terminal towers and the floor area are reduced. The cable of the six-loop terminal tower is led down, and the overhead conductor is directly led down vertically by adopting the tensile strain insulator string in the lead-down mode. Compared with the existing double-loop and four-loop cable terminal tower lead-down scheme, the cable terminal tower has the advantages of reduced number and smaller occupied space, and is beneficial to city planning.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a six return circuit tower overhead line cable draws down structure which characterized in that: the tower comprises a T-shaped tower, wherein a ground wire cross arm, an upper two-circuit wire cross arm, a lower four-circuit wire cross arm and a terminal platform are sequentially arranged on the tower from top to bottom, each cross arm of the upper two-circuit wire cross arm is provided with one wire hanging point, and each cross arm of the lower four-circuit wire cross arm is provided with two wire hanging points to form eighteen wire hanging points of six circuits; the length of the ground wire cross arm is larger than that of the lower wire cross arm, three vertical down-leading wires are arranged on the left side and the right side of the ground wire cross arm, wires of wire hanging points of the upper two wire cross arms are oppositely pulled by adopting strain insulator strings and are respectively led to the corresponding down-leading wires, the lower two loops of the lower four wire cross arms are led to the upper wire by utilizing the tower body on the overhead side, the upper wire is oppositely pulled to the terminal platform by adopting the strain insulator strings, the upper two loops of the lower four wire cross arms are jumped to the cable side by adopting a jumper wire, then the upper two loops of the lower four wire cross arms are led to the cable side of the lowermost cross arm by adopting the cross arm insulators, and then the strain insulator strings are oppositely pulled to the terminal platform.

2. The six-loop tower overhead line cable down-lead structure of claim 1, wherein: the tower is provided with two terminal platforms on the size side of the cable terminal tower, and the left side surface and the right side surface are provided with one terminal platform respectively.

3. The six-loop tower overhead line cable down-lead structure of claim 1, wherein: the left end side of the ground wire cross arm exceeds the left end side of the lower wire cross arm, the right end side of the ground wire cross arm exceeds the right end side of the lower wire cross arm, and the length of the ground wire cross arm meets the requirement of an electric gap for leading down the wire.

4. The six-loop tower overhead line cable down-lead structure of claim 1, wherein: the wires of the wire hanging points of the two upper wire return cross arms sequentially pass through the strain insulator string and the duplex jumper wire composite insulator string and are turned into a vertically downward direction from the horizontal direction, and finally are connected with the corresponding down lead through the lower guide wire, the top end of the down lead is connected with the ground wire cross arm through the strain insulator string, and the bottom end of the down lead is connected with the terminal connecting terminal through the strain insulator string.