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Full-symmetrical cylindrical membrane wall assembly tooling and assembly method

A cylindrical membrane wall and membrane wall technology, applied in the field of coal chemical industry, can solve the problems of welding defects, easy to be pulled apart, large welding shrinkage, etc., and achieve the effect of avoiding bending and easy removal

Inactive Publication Date: 2014-12-10
KAIFENG AIR SEPARATION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When welding with the mold group, 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, commonly known as Yaya gourd; Make the assembly and welding impossible; 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

Method used

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  • Full-symmetrical cylindrical membrane wall assembly tooling and assembly method
  • Full-symmetrical cylindrical membrane wall assembly tooling and assembly method
  • Full-symmetrical cylindrical membrane wall assembly tooling and assembly method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 , 2 ,3,4,5,6,7,8,9, a cylindrical membrane wall fully symmetrical assembly tooling, the cylindrical membrane wall 1 includes 64 round tubes 3, each membrane wall unit Both are two-tube and three-flat steel unit 2. The two-tube and three-flat steel unit is composed of two round tubes, one flat steel 4 and two narrow flat steels 5. The two narrow flat steels are grooved according to the welding requirements; the tooling It includes a mold 6, which includes a plurality of positioning rings 7 and 4 connecting steel pipes 9. The positioning rings are respectively sleeved and fixed on the outside of the 4 connecting steel pipes. The distance between the two positioning rings at both ends of the connecting steel pipe is greater than The length of the cylindrical membrane wall; the outer diameter of the positioning ring is provided with the same number (32) of two tubes and three flat steel units (32) divided along the generatrix as the cylindrical membrane wall ...

Embodiment 2

[0035] On the basis of the first embodiment, a method for fully symmetrical pairing of cylindrical membrane walls, the steps of the method are as follows:

[0036] Step 1: Use a membrane wall welder to weld round pipes, flat steels and narrow flat steels into a two-tube three-flat steel unit, and cut the narrow flat steel at the end of the two-tube three-flat steel unit into a groove according to the welding requirements;

[0037] Step 2: Install the first group of two-tube three-flat steel unit on the mould, and determine the relative position of the first group of two-tube three-flat steel unit and the mould through the bisector on the alignment plate and the positioning ring. After confirming, insert the upper end of the directional plate into the middle of the two round pipes in the first group of two pipes and three flat steel unit, and the upper end is attached to the two round pipes, and the lower end is welded to the positioning ring vertically;

[0038] Step 3: Weld the vert...

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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 method for fully symmetrical assembly of cylindrical membrane walls 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 an outer shell and internal parts, which are mainly composed of multi-section cylindrical water-cooled membrane walls; most cylindrical membrane walls It is welded alternately by round tubes and flat steel. [0003] Cylindrical membrane wall is generally composed of circular tube and flat steel alternately welded. Due to the small width of flat steel, the welding seam of membrane wall is very dense. Also, because the section of cylindrical membrane wall is circular, it cannot be like a flat membrane wall. The tube row is welded directly with a membrane wall welder. At present,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/04B23K31/02
Inventor 徐纪高周礼新冷雪峰王鸿雁何永亮
Owner KAIFENG AIR SEPARATION GROUP
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