In-situ piecewise heat treatment method of large pressure container

A heat treatment method and pressure vessel technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of easy deformation of pressure vessels, heavy workload, large volume of large pressure vessels, etc., and achieve the effect of avoiding deformation defects

Inactive Publication Date: 2010-03-31
傅家仁 +1
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large volume of welded large pressure vessels, figure 1 The traditional heat treatment methods shown do not allow for the overall heat treatment of such large vessels, and section-by-section heat treatment is a good and practical approach
[0005] If the pressure vessel is sent into figure 1 The heat treatment is carried out in the industrial furnace 10 shown, and the pressure vessel section needs to be placed on the trolley and sent into the industrial furnace 10 through the furnace door of the industrial furnace 10, and the workload is very large
In addition, this is a horizontal heat treatment method. Due to the large volume and weight of large pressure vessels, the horizontal pressure vessel is very easy to deform during heat treatment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • In-situ piecewise heat treatment method of large pressure container
  • In-situ piecewise heat treatment method of large pressure container
  • In-situ piecewise heat treatment method of large pressure container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The large pressure vessel of the present invention refers to an integral pressure vessel that cannot be transported on roads, and the diameter of this type of pressure vessel is usually equal to or greater than 4 meters.

[0036] figure 2 The in-situ stage-by-stage heat treatment method for a large pressure vessel of the present invention is shown. figure 2 The large-scale pressure vessel shown is composed of 10 pressure vessel cylinder rings welded together from the first to the tenth, and the post-weld heat treatment is divided into six sections. The weld seam is formed after the adjacent pressure vessel barrel joints are welded. figure 2 In the large pressure vessel shown, there are altogether 9 welds 41-49 from the first to the ninth. Obviously such a large pressure vessel is impossible to adopt figure 1 The traditional heat treatment method shown above is used to complete the overall heat treatment, so the inventor invented a method for performing heat treatm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an in-situ piecewise heat treatment method of a large pressure container, which comprises the following steps: respectively setting an inner cavity of each section of pressurecontainer cylinder body of the large pressure container being installed and constructed into a hearth; starting from the bottom section, performing the heat treatment on one section of pressure container cylinder body when installing and constructing the section of pressure container cylinder body; and installing and constructing one section of pressure container cylinder body on the heat-treatedsection of pressure container, and performing the heat treatment on the former section of pressure container cylinder body until the heat treatment is performed on the installed and constructed highest section of pressure cylinder body. The invention can save the step of heat treatment on a welding circular seam by using an electric heater.

Description

technical field [0001] The present invention relates to a post-welding heat treatment technology, in particular to a method for step-by-step heat treatment of a large pressure vessel, or a method for performing step-by-step heat treatment on a large pressure vessel being installed. Background technique [0002] Post-weld heat treatment of pressure vessels is a key process in the final stage of pressure vessel manufacturing. The quality of post-weld heat treatment directly affects the overall internal quality of the pressure vessel. Unlike weld defects, post-weld heat treatment cannot be reworked, and heat treatment takes a long time and costs a lot. The effect of post-weld heat treatment is guaranteed by the post-weld heat treatment process. Therefore, the faithful execution of post-weld heat treatment process is the key to ensure the effect of post-weld heat treatment. The uniformity of heat treatment temperature, the rationality of holding time, and the accuracy of temper...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/00
Inventor 傅家仁傅敏杰
Owner 傅家仁
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products