Full-symmetrical cylindrical membrane wall assembly tooling and assembly method

The invention relates to a full-symmetrical cylindrical membrane wall assembly tooling and an assembly method which are applicable to high-efficiency gasifiers in the coal chemical industry. The method includes the following steps: (1) a membrane wall welder is used for welding round pipes and steels into membrane wall units, and each membrane wall unit consists of the round pipes and the flat steels; (2) the first group of membrane wall units are mounted on a positioner, the lower ends of directional blocks are vertically welded on positioning rings, and thereby the first group of membrane wall units only can be axially moved on the positioner; (3) a second group of membrane wall units which are fully symmetric with the first group of membrane wall units are mounted on the positioner; (4) the two groups of membrane wall units are welded together, and weld joints are located at the middle between the two groups of membrane wall units; (5) according to the method, the welding of the whole cylindrical membrane wall is sequentially carried out. The full-symmetrical cylindrical membrane wall assembly tooling and the assembly method which are disclosed by the invention can adjust the welding sequence, so that the weld joints can always be located at the geometrical middle of the welded workpiece, and thereby great bending is prevented in the process of welding.