Multi-flange dissimilar metal structure connection method

Abstract

The invention discloses a multi-flange dissimilar metal structure connection method. When a plurality of internal metal structural members and peripheral metal structural members which are made of dissimilar materials are connected through a plurality of flanges, the peripheral structural members are decomposed, then are connected with the internal structural members through bolt components and are compressed in blocks. In order to guarantee potential insulation, an insulating short bushing is arranged in a flange screw hole, and one bolt component is arranged in the bushing. In order to guarantee waterproofness and air tightness after connection, insulating soft elastic beddings are arranged between the flanges, and the sealing between the flanges is realized by arranging and compressing the beddings in blocks. After the structural members are assembled in blocks, the blocks of the peripheral structural members are welded to finish all connection. Since the peripheral structural members are decomposed and assembled, the insulating soft elastic beddings are compressed, and the sealing property of the connecting flanges is guaranteed; and the potential insulation is realized by arranging the insulating short bushing in the screw hole.

Description

technical field [0001] The invention relates to a construction method for flange connection of dissimilar metal structures, especially for the installation and connection of complex-shaped titanium alloy structures on steel ships. Background technique [0002] There are three or more contacting flange surfaces in the existing connection of metal structural parts of different materials. It is very difficult to ensure the watertight and airtight requirements of the connected structure when welding cannot be performed. For example, when a titanium alloy dome is installed on a ship, the connection between the titanium alloy material and the steel hull is connected by bolts through four flat flanges. Different metals need potential insulation, and the overall structure requires sealing after connection. Existing traditional plug-in connection methods, such as figure 1 and figure 2 As shown, the structural part 2 is placed in the structural part 1, and the structural part 1 and...

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Problems solved by technology

[0004] 1) The general metal flange plate is thick and rigid, and cannot be deformed by tension and compression at will after manufacturing and forming, so it is difficult to compress each other, and forced operation will cause internal stress concentration of the structure or tear the flange weld;

[0005] 2) The multi-flange connection is easy to deviate from the center, and there is a gap between the flanges, which cannot meet the tightness requirements;

[0007] 4) Even if there is a soft elastic cushion between the flanges, it is not fully compressed to play a sealing role

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