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A method of manufacturing a cylinder withstanding internal pressure

A manufacturing method and cylinder technology, applied in manufacturing tools, household containers, auxiliary devices, etc., can solve problems such as stress-strain relationship no longer conforming, material waste, etc., to improve pressure bearing capacity, reduce manufacturing costs, and save materials. Effect

Inactive Publication Date: 2017-03-29
SEDIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of technology, the diversification of material types and the accumulation of material data, most of the stress-strain relationships of steel used for pressure vessels no longer conform to the law of the ideal elastoplastic model. Particularly conservative, resulting in a huge waste of materials

Method used

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  • A method of manufacturing a cylinder withstanding internal pressure
  • A method of manufacturing a cylinder withstanding internal pressure
  • A method of manufacturing a cylinder withstanding internal pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The steps of this embodiment are as follows:

[0034] 1. Calculation factor:

[0035]

[0036] Among them, Pc is the calculated pressure and equal to 1.0 MPa, σs is the yield stress and equal to 205 MPa, E 1 Is the slope of the strain-strengthened section, also known as the fitted elastic modulus and equal to 1826.2MPa, E is the slope of the elastic section, also known as the elastic modulus 1.95x10 5 MPa(σ s , E 1 , E is the material parameter of the austenitic stainless steel S30408 ​​sheet, which can be obtained by querying GB24511-2009 "Stainless Steel Plates and Strips for Pressure Equipment" or performing a tensile test), calculated A = 0.01279, B = 0.00945.

[0037] 2. Calculate by the following calculation formula:

[0038]

[0039] Where Di is the inner diameter of the inner pressure cylinder and is equal to 2000mm, and finally the inner pressure cylinder wall thickness δ is calculated to be 6.35mm. Considering that the thickness of the plate is mostly an integer, the ...

Embodiment 2

[0046] The calculation steps of this embodiment are as follows:

[0047] 1. Calculation factor:

[0048]

[0049] Where Pc is the calculated pressure and is equal to 20MPa, σ s Is the yield stress and is equal to 241.5MPa, E 1 Is the slope of the strain-strengthened section, also known as the fitted elastic modulus and equal to 4250MPa, E is the slope of the elastic section, also known as the elastic modulus 2.1x10 5 MPa, (σ s , E 1 , E is the material parameter of alloy steel 15CrMoR sheet, the data can be obtained by querying GB713-2014 "Steel Plate for Boiler and Pressure Vessel" or conducting tensile test), calculated A=0.21901, B=0.02066.

[0050] 2. Calculate by the following calculation formula:

[0051]

[0052] In the formula, Di is the inner diameter of the inner pressure cylinder and is equal to 1000mm, and the final calculated inner pressure cylinder wall thickness δ is 56.90mm. Considering that the plate is an integer and some margin is left, the plate thickness is 58mm. ...

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Abstract

The invention provides a manufacturing method of a cylinder for bearing internal pressure. The manufacturing method comprises the steps that non-dimensional coefficients A and B are figured out through pressure, yield stress, a fitting elasticity modulus E1 and an elasticity modulus E at first; then the thickness delta of a plate is calculated based on the formula shown in the specification; the plate is reeled and welded according to the calculation result; and pressure maintenance strengthening is carried out on equipment at the pressure which is 1.25-1.5 times that of Pc. The manufacturing method has the advantages of being capable of effectively saving materials and reducing the manufacturing cost and wide in application range.

Description

Technical field [0001] The invention relates to a method for manufacturing a cylinder withstanding internal pressure. Background technique [0002] The cylindrical cylinder that bears the internal pressure is called the internal pressure cylinder for short. It is a structure commonly used in engineering, and it is the most important part of the pressure vessel. Pressure vessel is a kind of equipment commonly used in oil refining, chemical, light industry, food, pharmaceutical, metallurgy, marine, aerospace and other fields. The main function of the cylinder bearing the internal pressure is to provide the pressure-bearing space required by the process, and to cooperate with other different components, different media and different operating conditions to achieve storage, heat transfer, mass transfer, mixing, and separation in the internal space. , Reaction and other purposes. Since the internal pressure cylinder of the pressure vessel in the industrial production process is ofte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02B23K37/00
CPCB23K31/02B23K37/00B23K2101/12
Inventor 周军张婷婷王冀宁赵世平
Owner SEDIN ENG