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Classification of line towers

Release Time:

2022-03-31

Line towers are rigid support structures used to erect transmission lines. In order to avoid the danger of corona discharge and induced electrostatic field to people, the poles and towers used for high-voltage and ultra-high-voltage transmission lines must have sufficient height, and the transmission lines erected on the towers need to have a considerable distance.

The hydrogeological conditions along the transmission line vary greatly, so it is very important to choose the foundation form according to the local conditions. There are two basic types of line towers: cast-in-place and prefab. According to the type of tower, groundwater level, geology and construction method, the poured foundation is divided into undisturbed soil foundation, explosion-expanded pile and cast-in-place pile foundation, and ordinary concrete or reinforced concrete foundation. The prefabricated foundations for line towers include chassis for poles, chucks and cable reels, various types of prefabricated precast concrete foundations and metal foundations for towers. According to different foundation forms and different soil conditions, experts are currently researching and dealing with the theoretical calculation of foundation anti-uplift and anti-overturning to make it more reasonable, reliable and economical.

According to the structural material, the line tower can be divided into wood structure, steel structure, aluminum alloy structure and reinforced concrete structure. China has phased out wooden poles and towers due to low strength, short lifespan, inconvenient maintenance and limited timber resources. The steel structure is divided into truss and steel pipe. Lattice truss towers are widely used line towers and are the main structures for lines above ultra-high voltage. Due to the high cost of aluminium line towers, they are only used in mountainous areas where transportation is particularly difficult.

Reinforced concrete line towers are cast by centrifuge and steam cured, with short production cycle, long service life and simple maintenance, which can save a lot of steel. The concrete line tower with local prestressing technology can also prevent the rod from cracking and has reliable quality.

According to the structure, line towers can be divided into two types: freestanding towers and pull towers. A self-supporting tower is a pole tower that is stabilized on its foundation. The stay tower is to install symmetrical stay wires on the tower head or tower body to support the tower stably, and the tower itself only bears vertical pressure. This kind of utility pole saves nearly 40% of steel, but the cable distribution occupies a lot of land, which is not conducive to agriculture, forestry machinery and agriculture, and the scope of use is limited. Due to the good mechanical properties of the cable-stayed line tower, it can resist the impact of storm attack and line disconnection, and has a stable structure. Therefore, the higher the voltage, the more traction towers are used.

The company has more than 60 years of production history. It has a provincial-level power transmission and transformation grid engineering technology research center and a provincial-level enterprise technology center;

Henan Dingli Tower Co., Ltd. was recognized as a provincial technology center

On September 9, 2017, the technology center of Henan Dingli Tower Co., Ltd. was jointly recognized as the twenty-first batch of enterprise technology centers in Henan Province by the Henan Provincial Development and Reform Commission, the Department of Science and Technology, the Department of Finance, the State Taxation Bureau, the Local Taxation Bureau, and the Customs.

Congratulations to the official website of Henan Dingli Tower Co., Ltd. officially launched!

The company has large-scale production equipment such as 3,200-ton CNC hydraulic bending machine, flange assembly welding machine, intersecting wire cutting machine, gantry drilling machine, internal welding machine, etc.

Henan Dingli Tower Co., Ltd. achieved excellent results in the Zhumadian Welding Skills Competition

On December 13, the Zhumadian 2Skills Competition017 Skills Competition came to an end. Young welders from Henan Dingli Tower Co., Ltd., Li Yaoqiang, Xu Dongdong, and Zhang Zhuangzhuang won the first and second place (tied) in the city.

Classification of power line towers

Pole towers are divided into the following 7 types according to their purposes:

Strong quality and integrity, Dingli is famous!

On November 6, 2019, Henan Quality Association released the evaluation results of the 2019 "Henan Province Quality Brand" project and the evaluation results of the 2019 "Quality Integrity System AAA-level Enterprise".