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A processing technology for cooling and heating coils on large equipment

A technology for cooling coils and large-scale equipment, which is applied in the field of processing technology of cooling and heating coils. High-level problems, to achieve the effect of easy assurance of welding quality and product quality, stress relief and shaping treatment, reduction of material loss and production time

Active Publication Date: 2016-05-18
中化学华谊装备科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the coil winding operation is complicated, the processing cycle is long, and the forming quality of the coil is poor, and the bonding rate between the coil and the coil is not high. performance

Method used

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  • A processing technology for cooling and heating coils on large equipment
  • A processing technology for cooling and heating coils on large equipment

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Experimental program
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Effect test

Embodiment 1

[0018] A processing technology for densely wound cooling and heating coils in large equipment, the technology includes the following steps:

[0019] 1) According to the requirements of the process design, each group of cooling coils (1) is bent; the cooling coils (1) are seamless steel pipes with a circular cross section;

[0020] 2) Arrange 6 sets of bent cooling coils (1) in sequence on the horizontal plane;

[0021] 3) According to the arrangement shape of the cooling coils (1), stake out and cut the connection plate (4) between the cooling coils (1) and the cooling coils (1);

[0022] 4) processing the welding groove of the cooling coil (1);

[0023] 5) According to the pre-arrangement form of each group of cooling coils (1) and connecting plates (4), each bent cooling coil (1) and connecting plates (4) are welded in groups on a horizontal plane;

[0024] 6) According to the gap between the inner diameter of the shell wall (3) of the large-scale equipment and the cooling...

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Abstract

The invention relates to a machining process for novel cooling heating coils used on a large scale device. The process includes the following steps: 1) bending each group of cooling coils; 2) sequentially arranging the groups of bended cooling coils on the horizontal plane; 3) conducting pattern grading and cutting on connection plates between the cooling coils; 4) machining welding grooves of the cooling coils; 5) welding each bended cooling coil and a corresponding connection plate on the horizontal plane by group; 6) determining the circle rolling radius of each group of cooling coils and connection plates; 7) conducting circle rolling on each group of welded cooling coils and connection plates; 8) conducting stress removing setting on the cooling coils and the connection plates; 9) sequentially arranging the cooling coils and the connection plates subjected to circle rolling formation on a support piece; 10) conducting butt welding on the cooling coils and the connection plates sequentially and conducting flaw detection on welding gaps to ensure that the coils are qualified. The process has the advantages of being convenient to manufacture and operate and less in material consumption and not requiring additional manufacture of tools. The quality is easy to control.

Description

technical field [0001] The invention relates to a processing technology for cooling and heating coils used in large-scale equipment, in particular to a processing technology for densely wound cooling and heating coils in large-scale equipment. Background technique [0002] With the development of petroleum and chemical industries, chemical equipment tends to be larger and more complex in structure. Take the large-scale equipment oxidation furnace-waste heat boiler as an example. It is the core equipment in the nitric acid production plant, and its performance is excellent. Poor directly affects the output of nitric acid plant. Large-scale oxidation furnace - the inner diameter of the waste heat boiler equipment shell is 3000-3300mm. On the shell wall of the equipment, there are multiple groups of cooling coils wound continuously. Afterwards, 100% radiographic inspection must be carried out, and it is required to reach the level of II; the surface of the welded joint must be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/26
CPCB23P15/26B23P2700/09
Inventor 蔡慈平张民伟袁敏玥
Owner 中化学华谊装备科技(上海)有限公司
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