Full-symmetrical cylindrical membrane wall assembly tooling and assembly method

Abstract

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.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a cylindrical membrane wall fully symmetrical assembly tool and assembly method suitable for high-efficiency gasifiers in the coal chemical industry. Background technique [0002] The coal chemical industry is playing an increasingly important role in the national economy; its main equipment "gasifier" is composed of a shell and internal parts, and the internal parts are mainly composed of multi-section cylindrical water-cooled membrane walls; most of the cylindrical membrane walls It is welded alternately by round tube and flat steel. [0003] The cylindrical membrane wall is generally composed of round tubes and flat steel alternately welded. Due to the small width of the flat steel, the welds of the membrane wall are very dense, and because the cross section of the cylindrical membrane wall is a circular structure, it cannot be welded like a flat membrane wall. The pipe ...

AI Technical Summary

Problems solved by technology

When welding with mold assembly, the following defects will be caused by the shrinkage of the weld seam: 1. There is a waist in the place where there is no support ring, and the outer shape is wavy; 2. The center line is greatly bent during assembly, which makes the assembly , Welding cannot go on; 3. Because the weld seam is very dense and the welding shrinkage is large, the weld seam is easy to be pulled apart, resulting in welding defects

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