CN2409273Y

CN2409273Y - Power line straight corner tower

Info

Publication number: CN2409273Y
Application number: CN 99258928
Authority: CN
Inventors: 王启瑞; 翁炳华; 刘勇; 肖洪伟; 宋志修; 刘矩; 牛志国; 王跃辉; 陈庆生; 柴曙光
Original assignee: SUPERHIGH VOLTAGE TRANSMISSION AND TRANSFORMATION YUNNAN POWER GROUP CO Ltd
Current assignee: SUPERHIGH VOLTAGE TRANSMISSION AND TRANSFORMATION YUNNAN POWER GROUP CO Ltd
Priority date: 1999-12-27
Filing date: 1999-12-27
Publication date: 2000-12-06
Anticipated expiration: 2009-12-27

Abstract

The utility model relates to a straight angle tower for power lines, which is exclusively used for the L-shaped arrangement of three-phase conducting wire insulators with unequal inner angle insulator chain length and outer angle insulator chain length. One end of a cross arm (5) is provided with an extension section (6) which bends toward the oblique lower part of the external side. The outer angle chains (7), (8) and (9) of L-shaped outer angle chains are respectively and directly hung on the extension section (6) of the cross arm, a left upper crank arm and a right upper crank arm (4). Inner angle chains (10), (11) and (12) are respectively and directly hung on the different sections of the cross arm (5), and the hanging position of the outer angle chains is lower than the hanging position of the inner angle chains. The wind deflection of L-shaped insulator chains is small, the tension acted on an iron tower is small, so that the size of the angle tower can be decreased, which reduces steel dosage and can effectively saves electric power corridor. The utility model is particularly suitable for districts with mountains and thick forest.

Description

The power circuit straight-line angle tower

The utility model relates to used for transmission line iron tower technical field, the straight-line angle tower when especially transmission line of electricity changes direction.

The straight-line angle tower that uses in the transmission line of electricity corner in the prior art, be to adopt three-phase conducting wire insulator I type as shown in Figure 1 to arrange, the windage yaw amplitude, ao L of this I type insulator is very big, in order to guarantee its insulation effect, reduce the tower head size, and the huge pulling force that sustains the corner power line, usually tower all is provided with hanger, in order to guarantee under various angles gap requirement to tower body, general every phase conductor all need be provided with the facility that three places can hang hanger on cross-arm, and the size of every place hanger, specification is all inequality, not only increased the complexity of iron tower structure, and strengthened the steel consumption of iron tower, made the making of iron tower, installation cost improves greatly.Because the swing of I type insulator is big, so the electric power corridor that takies is very wide, cuts down forest in a large number in the electric power corridor and the house of removing, and causes the significant wastage of human and material resources in addition.In order to solve above-mentioned shortcomings such as I type insulator string windage yaw amplitude is excessive, adopt L type insulator string as shown in Figure 3 on our straight-line angle tower in ultra-high-tension power transmission line, the windage yaw of this insulator string is very little.In order to be fit to the serial type characteristics of L type insulator string interior angle string length greater than the exterior angle string length, be convenient to hang and reach the optimum design result of use, just require the straight-line angle tower of a kind of practicality of our new designs.

The purpose of this utility model is exactly to design a kind of can matching with L type insulator string in order to satisfy above-mentioned requirements, saves natural resource, reduces cost of manufacture, reaches the straight-line angle tower of best result of use.

The purpose of this utility model is achieved by the following technical solution:

Cross-arm one end is provided with the extension that is folded to outer skew back below; The cross-arm extension, directly be mounted with the exterior angle string of L type insulator string on cranking arm on left and right respectively, directly be hung with three interior angle strings on the different sections of cross-arm, exterior angle string hanging point is lower than interior angle string hanging point.

Because cross-arm one end of angle tower has the extension that is folded to outer skew back below, the exterior angle of the L type insulator string of three-phase string (short string) directly is articulated in extension respectively, crank arm on left and right on, interior angle string (long string) all directly is articulated on the cross-arm, all the hanging point than interior angle string is low to make the hanging point of exterior angle string, under action of gravity, the pulling force of exterior angle string is less than the interior angle string, after the effect of power line transverse horizontal power, make interior angle string pulling force and exterior angle string pulling force approaching substantially, effectively utilized insulator string intensity; On the other hand, the windage yaw of L serial type is very little, thereby can reduce the tower head size greatly, and its lightning protection and electric property also make moderate progress, thereby needn't resemble and a hanger that is used to hang string is set the I serial type again, make angle tower seem small and exquisite attractive in appearance, structure is simpler, both save steel, and be convenient to install, can save the electric power corridor greatly again.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is the front view of the straight-line angle tower of configuration I type insulator string;

Fig. 2 is the left view of the straight-line angle tower of configuration I type insulator string;

Fig. 3 is the front view of the straight-line angle tower of configuration L type insulator string;

Fig. 4 is the left view of the straight-line angle tower of configuration L type insulator string;

Make each assembly of this tower earlier with steel respectively, assemble then.This straight-line angle tower adopts the terrestrial segment assembling, and then aerial butt joint group is upright.Four column foots 1 of this tower are assembled on the basis, more respectively successively the upright body of the tower 2 of group, lower bent lever 3, on crank arm 4 and cross-arm 5.After the iron tower assembling finishes, the three-phase L type insulator string that will assemble again is suspended on the iron tower, the exterior angle of insulator string string (short string) is articulated in cross-arm extension 6 respectively, crank arm on left and right on 4, interior angle string (long string) is articulated in respectively on the different sections of cross-arm 5, regulate angle α between the string of inside and outside angle by the hanging point height of regulating the exterior angle string, require α＜120 °, reach the stressed equilibrium of length insulator string.

Through evidence, existing rules requirement, novel structure are satisfied in this tower design, good looking appearance, iron tower is whole and local structure is reasonable in design, and steel quantity consumption is few, effectively forest felling and housing demolition are reduced in the conservation of power corridor, are particularly suitable for many mountains, arboreous landform.

Claims

1, power circuit straight-line angle tower, be exclusively used in the three-phase conducting wire insulator L type layout that inside and outside angle insulator string is uneven in length, by column foot (1), body of the tower (2), lower bent lever (3), on crank arm (4) and cross-arm (5) is formed, it is characterized in that cross-arm (5) one ends have the extension (6) that is folded to outer skew back below.

2, straight-line angle tower according to claim 1, it is characterized in that, directly be mounted with exterior angle string (7), (8), (9) of three-phase L type insulator string on cross-arm extension (6), crank arm on left and right (4) respectively, directly be hung with three interior angle strings (10), (11), (12) on the different sections of cross-arm (5), exterior angle string hanging point is lower than interior angle string hanging point.