Forming and assembling method for arranging spiral heat tracing pipe on outer surface of thick-wall container barrel

Abstract

The invention discloses a forming and assembling method for arranging a spiral heat tracing pipe on the outer surface of a thick-wall container barrel, and relates to a forming and assembling method for the heat tracing pipe. The problems that in a manufacturing process of an existing spiral heat tracing pipe, bent pipe forming is complex, the forming size is difficult to guarantee, and sleeving is difficult are solved by the forming and assembling method. The method comprises the following steps that 1, the outer surface of a cylinder is scribed; 2, a roller carrier rotates and enables the bending position to be at the lowest point, and a supporting cushion device is moved to the side lower part of the barrel; 3, before the heat tracing pipe is wound, enough allowance is reserved at the inlet end, and the heat tracing pipe is firmly welded to the barrel, the roller carrier is started, one end of the pipe is held simultaneously by an operator to move the pipe and the supporting cushiondevice, so that the pipe is spirally wound around a cylinder body; 4, the pipe is continuously wound, the tail end of the pipe is lengthened when the tail end of the pipe is not long enough, and thesteps 3 and 4 are repeated; 5, gas cutting is performed on the allowance and a groove of the inlet and outlet end of the tracing pipe; and 6, the inlet and outlet end of the tracing pipe is bent and formed. The forming and assembling method is used for forming and assembling the heat tracing pipe.

Description

technical field [0001] The invention relates to a forming and assembly method. Specifically relates to a forming and assembling method for arranging spiral heat tracing pipes on the outer surface of a thick-walled container cylinder, and belongs to the manufacturing field of preheating and heat preservation structures for pressure vessel shells. Background technique [0002] This structure is relatively rare for the spiral heat tracing tube arranged on the outer surface of the thick-walled container. For design drawings, see figure 1 , on the outer surface of the nearly 20-meter-long cylinder (specification Di2800, δ68, material Q345R), dense spiral heat tracing pipes (specification φ27×4, material 20) are evenly distributed at a certain interval. In addition, there are connecting pipes, lifting lugs and other accessories on the outer surface of the cylinder. If the spiral heating pipe adopts the conventional method of bending first and then fitting, not only the forming ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve many problems in the manufacturing process of the spiral heat tracing pipe arranged on the outer surface of the existing thick-walled container cylinder, such as complicated elbow forming, difficulty in ensuring the forming size, and difficulty in fitting, and further provide a thick-walled container Forming and assembly method of spiral heat tracing pipe arranged on the outer surface of cylinder

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