Novel prestressed reinforced concrete tower transition section conversion device

Abstract

The invention provides a novel prestressed reinforced concrete tower transition section conversion device which comprises an upper flange plate, a lower flange plate, a flange cylinder section, a stiffening plate, a steel backing plate, a prestressed steel strand, a connecting bolt and a positioning bolt. The novel prestressed reinforced concrete tower transition section conversion device is reasonable in structural design, firm in connection, good in stress characteristic, strong in anti-fatigue performance, low in cost, convenient and quick to install, and capable of realizing reasonable fastening connection between a prestressed concrete tower and a steel tower barrel.

Description

technical field [0001] The invention belongs to the technical field of prestressed steel-concrete towers, and in particular relates to a novel prestressed steel-concrete tower transition section switching device. Background technique [0002] With the rapid development of my country's wind power industry, the construction of onshore wind farms with better wind resources is gradually becoming saturated. In the future, the development of wind farms will gradually develop in areas with low wind speeds, and wind turbines will develop towards large unit capacity, large impeller diameters and high towers. . The lower part of the steel-concrete tower adopts a reinforced concrete tower tube, the upper part adopts a steel tower tube, and the foundation adopts a disc-shaped reinforced concrete structure. The three are connected by prestressed steel strands, which can meet the hub height and rigidity requirements of large-scale wind turbines. It has been widely concerned and promoted i...

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Problems solved by technology

The connection method of the transition section of the traditional steel-concrete tower usually adopts L-shaped flange connection. This connection method needs to use a thick flange formed by integral forging. As the height and diameter of the tower increase, the thickness of the matching flange becomes smaller and smaller The thicker, thereby increasing the cost of raw materials and machining costs

On the other hand, the length of the bolt assembly matching the L-shaped flange is limited by the thickness of the flange plate, resulting in a short length of the connecting bolts of the L-shaped flange and poor fatigue resistance; in addition, the prestress loss of the bolts is affected by the joint The influence of structural deformation is very large, so it is impossible to effectively control the size of the bolt prestress, and it is difficult to ensure that the connection of the tower is always under pressure during the operation of the fan

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