CN217001168U

CN217001168U - Cross arm structure for preventing uneven deicing jump of ground wire of existing power transmission tower

Info

Publication number: CN217001168U
Application number: CN202220050702.0U
Authority: CN
Inventors: 李志强; 朱晓东; 蒙春玲; 梁经龙; 牛彪; 田宇; 王金龙; 关志军; 王瑞成; 李治国; 王浩; 牛克想; 郭立波; 王锐; 田军涛; 刘杰; 祁晓明
Original assignee: China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
Current assignee: China Energy Engineering Group Shanxi Electric Power Engineering Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-07-19
Anticipated expiration: 2032-01-10

Abstract

The utility model provides a cross arm structure for preventing uneven deicing jump of a ground wire of an existing power transmission iron tower, and solves the technical problem of simply and economically reconstructing the ground wire cross arm of the existing power transmission iron tower. The cross arm structure for preventing the uneven deicing jump of the ground wire of the existing power transmission tower comprises an existing tangent tower body, wherein the existing tangent tower ground wire, an upper lead cross arm, a middle lead cross arm and a lower lead cross arm are respectively arranged on the existing tangent tower body, a lattice truss extension section of the tangent tower is horizontally and outwards connected to the outer side ends of the existing tangent tower ground wire and the upper lead cross arm in an extending mode, and a tangent tower ground wire hanging point is arranged at the top end of the outer side of the lattice truss extension section of the tangent tower.

Description

Cross arm structure for preventing uneven deicing jump of ground wire of existing power transmission tower

Technical Field

The utility model relates to a power transmission line iron tower, in particular to a cross arm of an existing power transmission line iron tower, which can effectively prevent uneven deicing jump of a ground wire.

Background

Serious disaster accidents such as disconnection, galloping, icing flashover, even tower collapse and the like can be caused by the ice coating of the power transmission line, and serious influence can be brought to the safe and stable operation of a power grid; in recent years, when a plurality of ultrahigh voltage and high voltage lines are subjected to ice disasters, tripping, line breaking and tower falling accidents occur sometimes, wherein the line tripping accidents caused by uneven deicing and jumping of ground lines are most frequent, and the reasons are found by analysis: horizontal offset between the ground wire and the lead of the power transmission line with the uneven deicing jump of the ground wire is small, so that the uneven deicing jump of the ground wire is easily induced to cause a line trip accident, and the length of a cross arm of the ground wire of the existing power transmission iron tower needs to be improved and lengthened to increase the horizontal offset between the ground wire and the lead; however, the problems of high transformation cost, serious material waste and long transformation period exist in the integral replacement of the ground wire cross arm.

Disclosure of Invention

The utility model provides a cross arm structure for preventing uneven deicing jump of a ground wire of an existing power transmission iron tower, and solves the technical problem of simply and economically reconstructing the ground wire cross arm of the existing power transmission iron tower.

The utility model solves the technical problems by the following technical scheme:

a cross arm structure for preventing ground wires of an existing power transmission tower from jumping due to uneven deicing comprises an existing tangent tower body, wherein an existing tangent tower ground wire, an upper lead cross arm, an existing tangent tower middle lead cross arm and an existing tangent tower lower lead cross arm are respectively arranged on the existing tangent tower body, lattice truss extension sections of the tangent tower are connected to the outer ends of the existing tangent tower ground wire and the upper lead cross arm in a horizontally and outwards extending mode, and tangent tower ground wire hanging points are arranged at the top ends of the outer sides of the lattice truss extension sections of the tangent tower.

The length of the lattice truss extension section of the tangent tower in the horizontal direction is 1100 mm, the length of the ground wire and the upper wire cross arm of the tangent tower in the horizontal direction is 9200 mm, the length of the wire cross arm in the tangent tower in the horizontal direction is 9002 mm, and the length of the wire cross arm under the tangent tower in the horizontal direction is 6812 mm.

The utility model provides an existing power transmission tower prevent cross arm structure of inhomogeneous deicing jump of ground wire, includes existing strain tower body of tower, on existing strain tower body of tower, be provided with existing strain tower ground wire cross arm respectively, wire cross arm on existing strain tower, wire cross arm and the wire cross arm under existing strain tower in the existing strain tower, at the outside end of existing strain tower ground wire cross arm, the level outwards extends outwards and is connected with the lattice formula truss extension section of strain tower, is provided with strain tower ground wire hanging point on the outside top of the lattice formula truss extension section of strain tower.

The utility model has the advantages of convenient component processing, simple field installation, low construction safety risk, short construction power failure time, and capability of well meeting the icing requirement of the horizontal deviation of the ground wire hanging point and the lead and effectively solving the problem of lead trip accidents caused by uneven deicing jump of the ground wire; compared with the traditional method for replacing the whole ground wire cross arm, the construction cost is greatly reduced, and the method has better technical and economic benefits, environmental benefits and social benefits.

Drawings

FIG. 1 is a schematic structural diagram of an existing tangent tower modified by the present invention;

fig. 2 is a schematic structural view of the lattice truss extension 5 of the tangent tower of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a sectional view taken along line C-C of FIG. 2;

FIG. 6 is a cross-sectional view taken along line D-D of FIG. 2;

FIG. 7 is a sectional view taken along line E-E in FIG. 2;

FIG. 8 is a schematic structural diagram of an existing tension tower after being modified according to the present invention;

fig. 9 is a schematic structural view of the lattice truss extension 12 of the tension tower of the present invention;

FIG. 10 is a sectional view taken along line F-F in FIG. 9;

FIG. 11 is a sectional view taken along line G-G in FIG. 9;

FIG. 12 is a sectional view taken along line H-H in FIG. 9;

FIG. 13 is a sectional view taken along line L-L in FIG. 9;

fig. 14 is a sectional view taken along line I-I in fig. 9.

Detailed Description

The utility model is described in detail below with reference to the accompanying drawings:

a cross arm structure for preventing uneven deicing jumping of an earth wire of an existing power transmission tower comprises an existing tangent tower body 1, wherein an existing tangent tower earth wire and an upper lead cross arm 2, an existing tangent tower middle lead cross arm 3 and an existing tangent tower lower lead cross arm 4 are respectively arranged on the existing tangent tower body 1, a lattice truss extension section 5 of a tangent tower is connected to the outer side end of the existing tangent tower earth wire and the upper lead cross arm 2 in a horizontally and outwards extending mode, and a tangent tower earth wire hanging point 6 is arranged at the top end of the outer side of the lattice truss extension section 5 of the tangent tower.

The length of the lattice truss extension section 5 of the tangent tower in the horizontal direction is 1100 mm, the length of the ground wire and the upper wire cross arm 2 of the tangent tower in the horizontal direction is 9200 mm, the length of the wire cross arm 3 in the tangent tower in the horizontal direction is 9002 mm, and the length of the wire cross arm 4 under the tangent tower in the horizontal direction is 6812 mm.

The method comprises the following steps of:

firstly, determining the size of an opening of a ground wire cross arm of an iron tower;

secondly, determining the extension size length of the ground wire cross arm according to the horizontal deviation requirement of the ground wire of the lead;

thirdly, three-dimensional modeling is carried out on the cross arm structure through iron tower calculation software, and the outer contour of the wire hanging device is determined;

fourthly, performing connection adjustment on the three-dimensional model and the original position wire cross arm, and performing local adjustment on part of rod pieces of the original position wire cross arm;

fifthly, carrying out numerical calculation according to the three-dimensional model, and determining the specification of each rod piece of the device;

sixthly, performing force transmission analysis calculation according to the three-dimensional model to ensure that the load of the hanging line point can be smoothly transmitted to each part of the iron tower;

seventhly, determining the size of a hanging point opening according to a ground wire hanging point hardware fitting;

eighthly, generating a hanging point device processing diagram through professional mapping software;

ninthly, processing and producing the lattice type truss extension section by a manufacturer according to the hanging point device drawing;

and tenth, assembling the truss on site by a construction unit, and symmetrically arranging lattice truss extension sections at two ends of the existing tangent tower ground wire and the upper lead cross arm (2).

The utility model provides a cross arm structure that uneven deicing of ground wire of preventing of existing power transmission tower jumps, including existing strain insulator tower body of the tower 7, on existing strain insulator tower body of the tower 7, be provided with existing strain insulator tower ground wire cross arm 8 respectively, wire cross arm 9 on the existing strain insulator tower, wire cross arm 10 and wire cross arm 11 under the existing strain insulator tower in the existing strain insulator tower, at the outside end of existing strain insulator tower ground wire cross arm 8, the level is connected with lattice formula truss extension 12 of strain insulator tower outwards extending, be provided with strain insulator tower ground wire hanging point 13 on the outside top of lattice formula truss extension 12 of strain insulator tower.

Claims

1. The cross arm structure comprises an existing tangent tower body (1), wherein an existing tangent tower ground wire, an upper lead cross arm (2), an existing tangent tower middle lead cross arm (3) and an existing tangent tower lower lead cross arm (4) are respectively arranged on the existing tangent tower body (1), and is characterized in that a lattice truss extension section (5) of a tangent tower is horizontally and outwards connected to the outer side end of the existing tangent tower ground wire and the upper lead cross arm (2), and a tangent tower ground wire hanging point (6) is arranged at the top end of the outer side of the lattice truss extension section (5) of the tangent tower.

2. The cross arm structure for preventing the uneven deicing jump of the ground wire of the existing transmission tower is characterized in that the horizontal length of the lattice truss extension section (5) of the tangent tower is 1100 mm, the horizontal length of the ground wire and the upper wire cross arm (2) of the existing tangent tower is 9200 mm, the horizontal length of the wire cross arm (3) in the existing tangent tower is 9002 mm, and the horizontal length of the lower wire cross arm (4) of the existing tangent tower is 6812 mm.

3. The utility model provides an existing power transmission tower prevent cross arm structure of inhomogeneous deicing jump of ground wire, including existing strain insulator tower body (7), on existing strain insulator tower body (7), be provided with existing strain insulator tower ground wire cross arm (8) respectively, existing strain insulator tower goes up wire cross arm (9), wire cross arm (10) and existing strain insulator tower down wire cross arm (11) in the existing strain insulator tower, its characterized in that, at the outside end of existing strain insulator tower ground wire cross arm (8), the level is outwards extended ground and is connected with lattice truss extension section (12) of strain insulator tower outward, is provided with strain insulator tower ground wire hanging point (13) on the outside top of lattice truss extension section (12) of strain insulator tower.