Reverse balance flange connecting joint and manufacturing method and application thereof

Abstract

The invention relates to a steel tower double-ring straight bearing type reverse balance flange connecting joint. The steel tower double-ring straight bearing type reverse balance flange connecting joint comprises an upper flange tower and a lower flange tower, wherein an upper stiffening plate is welded to the inner wall of the upper flange tower; a lower stiffening plate is welded to the inner wall of the lower flange tower; an upper balance ring is welded to the inner side of the upper stiffening plate; a lower balance ring is welded to the inner side of the lower stiffening plate; the upper surface of the upper stiffening plate is connected with an upper flange plate through structural adhesive; the lower surface of the lower stiffening plate is connected with a lower flange plate through structural adhesive; the upper flange plate and the lower flange plate are provided with bolt holes; and high-strength bolts penetrate through the upper flange plate and the lower flange plate through the bolt holes to connect the upper flange tower with the lower flange tower. Compared with the prior art, the steel tower double-ring straight bearing type reverse balance flange connecting joint has the advantages of being low in machining difficulty, convenient to install, excellent in fatigue resistance, high in circumferential rigidity and the like.

Description

technical field [0001] The invention belongs to the technical field of steel tower tube connection of wind power generation tower structures in structural engineering, and in particular relates to a steel tower tube double-ring direct support type reverse balance flange connection node. Background technique [0002] At present, wind turbines often use large-diameter steel pipe towers as the supporting structure, and the performance of the connection nodes of large-diameter steel towers is crucial to ensure the normal operation of wind turbines. [0003] The thickness of the flange plate of the traditional forged flange is relatively large, the end face of the entire flange plate is milled flat, the workload is large, it is difficult to process, the cost is high, and the connecting bolts are easy to loosen under the action of fatigue load; the existing reverse balance flange (ZL200920291676. 5. ZL201120088100.6 and ZL201620467194.0) include "reverse" flange plates and a "bala...

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Problems solved by technology

However, the existing reverse balance flange has many welds, including multiple welds between the flange plate and the cylinder wall, the stiffened plate and the flange plate, and the stiffened plate and the cylinder wall. The welding workload of the factory is large, and the flange plate and the The welding seam of the cylinder wall is separated by the stiffening plate, which cannot be welded automatically, and manual welding is difficult, and the quality of the weld seam is difficult to guarantee; the flange is prone to irregular deformation due to insufficient bending rigidity during transportation to the tower processing plant and the welding process of the tower , leading to a large deviation in the roundness of the tower, which in turn affects the installation of the tower

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