Method for Checking Strength of Reinforced Sealed Flat Cover

A strength check, flat cover technology, applied in the direction of instruments, mechanical equipment, design optimization/simulation, etc., can solve the lack of standards and calculation examples, the calculation formula for the thickness of the reinforced flat cover, and the check and addition are not given. problems such as the strength of the rib sealing flat cover, etc., to achieve the effect of ensuring safe service and obvious economic benefits

Active Publication Date: 2022-02-25
HARBIN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the structure of the reinforced and sealed flat cover is shown in the appendix of the instruction manual. figure 1 , see the appendix of the manual for the structure of the non-reinforced sealed flat cover figure 2 , for the reinforced flat cover, the pressure vessel design standard (GB150) gives the strength design and checking method of the flat cover for the non-sealed structure, and does not give the thickness calculation of the reinforced flat cover with its connection form At the same time, the specific case does not give an example of how to check the strength of the reinforced sealing flat cover, lacking the support of standards and calculation examples. Because of this, it is urgent to propose a method for checking the strength of the reinforced sealing flat cover to solve the problem. The strength check and design of the reinforced flat cover connected by flanges and studs, and applied to specific design activities

Method used

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  • Method for Checking Strength of Reinforced Sealed Flat Cover
  • Method for Checking Strength of Reinforced Sealed Flat Cover
  • Method for Checking Strength of Reinforced Sealed Flat Cover

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specific Embodiment approach 1

[0036] Specific implementation mode one: the method for checking the strength of the reinforced sealed flat cover of the present implementation mode includes the following steps:

[0037] Step 1: Calculate the thickness of the unreinforced flat cover according to the flange design method of the pressure vessel design standard;

[0038] Step 2: Determine the thickness of the reinforced flat cover and take 0.55 times the thickness of the non-reinforced flat cover;

[0039] Step 3: Check the structural strength of the dangerous section of the flat cover;

[0040] Further, in step 1, according to the flange design method of the pressure vessel design standard specification, the specific method for calculating the thickness of the unreinforced flat cover is:

[0041] 1 Find the width of the contact surface between the rib flat cover and the pressure vessel installation gasket

[0042] N=(D1-D2) / 2

[0043] In the formula, N is the width of the gasket contact surface, D1 is the ou...

specific Embodiment approach 2

[0108] Specific embodiment two: the method for checking the strength of the reinforced sealing flat cover of the present embodiment, applying this patent, needs to use the numerical method to solve the stress condition of the dangerous section of the structure, to meet the requirements of the structural limit analysis, the local area (sealing surface area) ) should meet the assessment requirements of the stress classification method; the reliability of the seal at the sealing surface should be judged based on the calculation results of the numerical method. The following is an example of the actual project, the structure diagram is shown in the instruction manual image 3 , Figure 3a , Figure 3b and Figure 3c , explain the principle of this patent:

[0109] image 3 Among them, ① reinforced flat cover; ② flange; ③ cylinder section; ④ strip rib; ⑤ O-shaped rubber ring;

[0110] The flat cover is at the diameter of Φ2656, which is also the dangerous section where the fla...

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Abstract

The invention discloses a method for checking the strength of a reinforced sealing flat cover, which belongs to the technical field of strength design of a flat cover of a pressure vessel. The present invention solves the problem that the prior method does not have a method for checking the strength of the reinforced sealing flat cap, which leads to poor design standardization of the flat cap and the low service life of the reinforced sealing cap designed by the designer. The invention comprises step 1: calculating the thickness of the non-reinforced flat cover according to the flange design method of the pressure vessel design standard specification; step 2: determining the thickness of the reinforced flat cover to be 0.55 times the thickness of the non-reinforced flat cover; step 3: Check the structural strength of the dangerous section of the flat cover. The method for checking the strength of the reinforced sealing flat cover of the present invention solves the confusion of engineering designers in designing such parts, and is practically applied to actual design activities. The economic benefit is obvious with the increase of the diameter of the outer ring of the flat cover.

Description

technical field [0001] The invention relates to a method for checking the strength of a reinforced sealing flat cover, which belongs to the technical field of strength design of a flat cover of a pressure vessel. Background technique [0002] The reinforced sealing flat cover has its advantages, and the economic benefits are relatively obvious. Since the flat cover connected by flange studs is a rigid body, its failure mode is transitional deformation leading to sealing failure. Due to the poor stress state of the flat plate, in order to meet the sealing requirements , the flat cover needs to be very thick, which consumes more metal. Because of this, through reinforcement, the required thickness and metal consumption of the flat plate are reduced under the same internal pressure, and the economic benefits are obvious. [0003] At present, the structure of the reinforced and sealed flat cover is shown in the appendix of the instruction manual. figure 1 , see the appendix of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17F16J13/00G06F119/14
CPCF16J13/00G06F30/17G06F2119/06G06F30/23
Inventor 邱砚明牟力波徐树林支南刘艳鹏武君车东光
Owner HARBIN ELECTRIC CO LTD
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