CN209293540U - A 110kV double-circuit lattice composite cross-arm transmission tower on the same tower - Google Patents

Abstract

A kind of compound cross-arm power transmission tower of 110kV common-tower double-return road lattice, it mainly includes tower leg, tower body lower part, tower body top, the compound cross-arm of double loop lattice and earth wire support；The compound cross-arm of double loop lattice includes the three layer conductor cross-arms with vertical tower body lateral arrangement, it is followed successively by conducting wire cross-arm, middle conducting wire cross-arm and lower wire cross-arm from top to bottom, six phase conductors are all made of " I " type hardware string and are coupled with power transmission tower conducting wire cross-arm；Upper conducting wire cross-arm, middle conducting wire cross-arm and the lower wire cross-arm is double loop composite material cross arm, and cross-arm component therein uses high-strength and high-modulus glass fibre reinforced composion tubular type section structural member, and component surface wraps up silicon rubber umbrella skirt；It has the characteristics that light-weight, strength-weight ratio is big, saves great deal of steel, good insulation preformance, it is horizontal that insulating Design can be effectively reduced, reduces phase conductor spacing and width of corridor, easy processing molding, transport and easy for installation.

Description

A 110kV double-circuit lattice composite cross-arm transmission tower on the same tower

technical field

The utility model relates to a 110kV same-tower double-circuit lattice type composite cross-arm power transmission tower, which belongs to the technical field of power transmission engineering.

Background technique

With the rapid development of urban construction, land has become an increasingly scarce resource, and people's concept of saving land resources and the concept of aesthetics and environmental protection are constantly increasing. The current problem is that, on the one hand, with the development of the economy, the city's electricity consumption has increased sharply, and the transmission capacity of some lines is far from meeting the requirements of enterprises and the people; on the other hand, due to the current public The greatly improved awareness of the environment and self-protection has made it very difficult for transmission lines to deal with policies, demolition and resettlement, and save corridors. This is one of the important reasons why composite materials have begun to be used in transmission towers.

Composite materials have the advantages of light weight, high strength, corrosion resistance, convenient processing and molding, and good electrical insulation. At present, it is possible to use composite materials for transmission line towers. After using composite materials, a large amount of steel can be saved, and its insulation performance can not only easily solve the wind deflection and pollution flashover accidents of the line, improve the safe operation level of the line, but also reduce the size of the tower head, reduce the width of the corridor, and save land resources , Reduce demolition costs, reduce project investment costs. In addition, due to the characteristics of light weight and easy processing and forming of composite materials, the transportation and assembly costs of the tower can be greatly reduced.

Contents of the invention

The purpose of this utility model is to overcome the deficiencies of the prior art, to provide a 110kV double-circuit grid on the same tower, which uses composite materials to optimize the space occupied by the corridor and uses composite materials for its good insulation performance and high mechanical strength. Constructed composite transmission tower.

The purpose of this utility model is accomplished through the following technical scheme, a 110kV double-circuit lattice structure composite cross-arm transmission tower on the same tower, which mainly includes tower legs, the lower part of the tower body, the upper part of the tower body, and the double-circuit lattice structure composite Cross arm and ground wire support; the double-circuit lattice type composite cross arm includes three layers of conductor cross arms arranged transversely to the upper part of the vertical tower body, and from top to bottom are the upper conductor cross arm, the middle conductor cross arm and the lower conductor cross arm. The wire cross arm and the six-phase wire are all connected with the "I" type fittings string and the transmission tower wire cross arm.

As a preference: the upper conductor crossarm, the middle conductor crossarm and the lower conductor crossarm are double-circuit composite material crossarms, wherein the crossarm members adopt high-strength and high-modulus glass fiber reinforced composite circular tubular cross-section members, and the members The surface is covered with silicone rubber umbrella skirts, and steel sleeves are used to connect the components of the double-circuit composite material cross arm and between the components and the tower body.

Due to the better insulation performance of the composite material, the length of the fitting string (cancellation of the insulator) and the air space between the wire and the tower body can be reduced under the condition of ensuring the same insulation level, thereby reducing the distance between the three-phase wires and compressing the corridor.

The utility model applies the latest composite material to the conventional transmission tower, and through reasonable electrical planning and structural calculation, utilizes the insulation performance of the composite material, cancels the insulator, reduces the length of the fitting string, and reduces the wind deflection of the fitting string, thereby effectively solving the problem. Transmission lines occupy too many and too wide corridors. This utility model will study the 110kV same-tower double-circuit series lattice-type transmission tower, and develop a new type of cross-arm composite material lattice-type transmission line linear tower.

Compared with the prior art, the utility model has the following beneficial technical effects: 1) Light weight, large strength-to-weight ratio, saving a lot of steel; 2) Good insulation performance, effectively reducing the insulation design level, reducing the distance between phase conductors, and reducing corridors In addition, it can significantly reduce lightning flashover, ice flash, galloping and other accidents; 3) chemical corrosion resistance, wear resistance, waterproof, fire and flame retardant; 4) easy processing and molding, convenient installation, transportation and assembly.

Description of drawings

Accompanying drawing 1 is the overall structural representation of the utility model;

Accompanying drawing 2 is the schematic diagram of composite material circular tubular section member described in the utility model;

Accompanying drawing 3 is the schematic diagram of the steel casing of the joint of the cross-arm member described in the utility model.

The labels shown in the figure are: 1 ground wire bracket, 2 wire upper cross arm, 3 wire middle cross arm, 4 wire lower cross arm, 5 tower body upper part, 6 tower body lower part, 7 tower leg, 8 fitting string, 9 Round tubular section, 10 components covered with silicone rubber shed, 11 steel sleeves, 12 sleeve inserts, 13 bolts.

Detailed ways

The utility model will be further introduced below in conjunction with the accompanying drawings. As shown in Figures 1-3, the 110kV same-tower double-circuit lattice type composite cross-arm transmission tower described in the utility model mainly includes tower legs 7, tower body lower part 6, tower body upper part 5, and double-circuit composite material cross-arm 2 /3/4 and ground wire support 1; the double-circuit composite material cross-arm includes three-layer wire cross-arms arranged vertically, and from top to bottom are upper wire cross-arm 2, middle wire cross-arm 3 and lower wire cross-arm Bearing 4, the six-phase conductors are connected with "I" type fittings strings and cross-arms of transmission tower conductors.

The double-circuit composite material cross-arm is: the cross-arm member adopts high-strength and high-modulus glass fiber reinforced composite material circular tubular cross-section member 9, the surface of the member is wrapped with silicone rubber shed 10, and the composite cross-arm members and the members and the tower body Between adopt steel casing 11 to connect.

Due to the better insulation performance of the composite material, the length of the fitting string (cancellation of the insulator) and the air space between the wire and the tower body can be reduced under the condition of ensuring the same insulation level, thereby reducing the distance between the three-phase wires and compressing the corridor.

As an improvement, the six-phase conductors are connected with the cross-arm of the transmission tower conductor by "I"-shaped metal strings, and the reduction of the string length further shortens the length of the cross-arm, thereby compressing the width of the line corridor.

As an improvement, the vertical spacing of the tower head is the same as that of the conventional tower, so that the composite cross arm can be replaced with an ordinary steel cross arm of the same voltage level in case of emergency repair.

As an improvement, the composite material cross-arm adopts a circular tube section, connected by a steel sleeve and an insert plate. Compared with the traditional composite material member with a flange at the end, the weight is greatly reduced, and the installation is basically the same as that of a conventional tower. Consistent, avoiding the connection transition section, the construction is convenient and fast.

Embodiment: A new lattice-type composite material cross-arm double-circuit power transmission tower on the same tower, which includes a ground wire support 1, a wire upper cross arm 2, a wire middle cross arm 3, a wire lower cross arm 4, and a tower upper part 5 , the lower part of the tower body 6, the tower legs 7 and the fittings string 8 are formed.

After the cross-arm of the double-circuit transmission tower on the same tower is made of composite materials, according to the consideration of full insulation of the cross-arm, the insulator is eliminated, the length of the fitting string is shortened, the gap circle is correspondingly reduced, the width of the corridor is reduced, and the transmission capacity of the unit corridor is improved, which reflects a good performance. Economical and environmentally friendly.

Claims (2)

1. A 110kV double-circuit lattice type composite cross-arm transmission tower on the same tower, which mainly includes tower legs (7), tower body lower part (6), tower body upper part (5), double-circuit lattice type composite cross-arm and Ground wire support (1); it is characterized in that the double-circuit lattice type composite cross-arm includes a three-layer wire cross-arm arranged transversely to the upper part (5) of the vertical tower body, and from top to bottom is the upper wire cross-arm ( 2), the cross arm of the middle conductor (3) and the cross arm of the lower conductor (4), the six-phase conductors are connected with the cross arm of the transmission tower conductor by "I" type fittings string. 2. The 110kV same-tower double-circuit lattice composite cross-arm transmission tower according to claim 1, characterized in that the upper conductor cross-arm (2), the middle conductor cross-arm (3) and the lower conductor cross-arm ( 4) Both are cross-arms made of double-circuit composite materials. The cross-arm members are made of high-strength and high-modulus glass fiber-reinforced composite material circular tube-shaped cross-section members (9), and the surface of the members is wrapped with silicone rubber sheds (10). Steel sleeves (11) are used to connect between the components of the load and between the components and the tower body.