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Method for calculating accurate feeding data of whole-mounting adjuster of large-diameter pressure steel pipe

A pressure steel pipe and calculation method technology, which is applied in calculation, electrical digital data processing, special data processing applications, etc., can solve problems such as difficult control of blanking size, and achieve the effect of solving difficult control

Inactive Publication Date: 2015-02-25
CHINA GEZHOUBA GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a calculation method for accurate blanking data of large-diameter pressure steel pipe assembly joints, which can solve the problem that the size of large-diameter pressure steel pipe assembly joints is difficult to control. Proceeding from the mathematical principle, with the mathematical quantification parameters, it can accurately calculate the precise blanking data of the whole assembly section required by the whole section assembly method

Method used

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  • Method for calculating accurate feeding data of whole-mounting adjuster of large-diameter pressure steel pipe
  • Method for calculating accurate feeding data of whole-mounting adjuster of large-diameter pressure steel pipe
  • Method for calculating accurate feeding data of whole-mounting adjuster of large-diameter pressure steel pipe

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Effect test

Embodiment 1

[0038] Embodiment 1 (compensation for pipe wall misalignment)

[0039] The calculation method of the accurate blanking data of "Section 68 of the pressure steel pipe of the 15# unit pressure steel pipe on the right bank of the Three Gorges" is as follows:

[0040] 1) Calculate the maximum pipe wall misalignment compensation amount △C brought about by the circumference difference between the joint 1 and the adjacent two penstocks 2 and 3: determine the maximum permissible circumference difference in penstock installation specifications according to the design drawings △ After L, according to the formula

[0041] △C=(△L / 2) / (2π)=(10mm / 2)÷(2×3.1415)=0.8mm

[0042] The calculation results in the maximum compensation amount of misaligned teeth on the pipe wall brought about by the difference in circumference of adjacent nozzles △C=0.8mm.

[0043] Among them, the value of △L is taken from the power industry standard "Code for Manufacture, Installation and Acceptance of Pressure Ste...

Embodiment 2

[0063] Embodiment 2 (Slab Width Margin Compensation)

[0064] The calculation method of the accurate blanking data of "the 73rd section of the pressure steel pipe of the 18# unit pressure steel pipe on the right bank of the Three Gorges" is as follows:

[0065] 1) Calculate the maximum pipe wall misalignment compensation amount △C brought about by the circumference difference between the joint 1 and the adjacent two penstocks 2 and 3: determine the maximum permissible circumference difference in penstock installation specifications according to the design drawings △ After L, according to the formula

[0066] △C=(△L / 2) / (2π)=(10mm / 2)÷(2×3.1415)=0.8mm

[0067] The calculation results in the maximum compensation amount of misaligned teeth on the pipe wall brought about by the difference in circumference of adjacent nozzles △C=0.8mm.

[0068] Among them, the value of △L is taken from the power industry standard "Code for Manufacture, Installation and Acceptance of Pressure Steel Pi...

Embodiment 3

[0089] Embodiment 3 (joint compensation)

[0090] The calculation method of the accurate blanking data of the 15# unit penstock section 73 of the pressure steel pipe on the right bank of the Three Gorges.

[0091] 1) Calculate the maximum pipe wall misalignment compensation amount △C brought about by the circumference difference between the joint 1 and the adjacent two penstocks 2 and 3: determine the maximum permissible circumference difference in penstock installation specifications according to the design drawings △ After L, according to the formula

[0092] △C=(△L / 2) / (2π)=(10mm / 2)÷(2×3.1415)=0.8mm

[0093] The calculation results in the maximum compensation amount of misaligned teeth on the pipe wall brought about by the difference in circumference of adjacent nozzles △C=0.8mm.

[0094] Among them, the value of △L is taken from the power industry standard "Code for Manufacture, Installation and Acceptance of Pressure Steel Pipes" DL5017, Section 4 Table 4.1.12

[0095] ...

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Abstract

The invention discloses a method for calculating the accurate feeding data of a whole-mounting adjuster of a large-diameter pressure steel pipe. The method for calculating the accurate feeding data of the whole-mounting adjuster of the large-diameter pressure steel pipe comprises the following steps that (1) the maximum pipe wall malposition compensations delta C between the whole-mounting adjuster and two adjacent pressure steel pipes are calculated; (2) the maximum malposition compensation delta OOC is calculated; (3) the maximum plate width margin compensation delta OOY is calculated; (4) the deviation value delta OO' of the centers of pipe orifices of the two pipes is calculated; (5) the deviation value delta OO' is compared with the maximum malposition compensation delta OOC and the maximum plate width margin compensation delta OOY, so that the accurate feeding data of the adjuster is obtained. According to the method for calculating the accurate feeding data of the whole-mounting adjuster of the large-diameter pressure steel pipe, the problem that the feeding size of the whole-mounting adjuster of the large-diameter pressure steel pipe is difficult to control can be solved, and the accurate feeding data of the whole-mounting adjuster required by whole-section adjusting can be worked out accurately based on the steel pipe whole-section adjusting mathematical principle by means of mathematical quantization parameters.

Description

technical field [0001] The present invention relates to a method for calculating the cutting data of bulk joints used in water conservancy and hydropower projects, especially a kind of accurate cutting data of bulk joints used in large-diameter pressure steel pipes (diameter φ greater than 6.0m) in water conservancy and hydropower projects calculation method. Background technique [0002] The improvised section of the penstock in water conservancy and hydropower projects is mainly used to compensate the mileage of the closing nozzle and the cumulative error of the center, so that it can be connected smoothly. Usually, there are two types of joint installation: 1. Use 2 to 5 pieces of tiles, leave a certain margin in length and width when cutting materials, and cut them on site according to the actual nozzle markings, which is commonly known as "tiles". Just enough." 2. According to the actual measurement of the coordinate size of the closed nozzle, the make-up joint is man...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张为明卫书满胡亚军蔡春华
Owner CHINA GEZHOUBA GROUP CO LTD
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