SU1652797A1 - Method of length-wise pipe wall thickness non-uniformity determination - Google Patents
Method of length-wise pipe wall thickness non-uniformity determination Download PDFInfo
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- SU1652797A1 SU1652797A1 SU894703280A SU4703280A SU1652797A1 SU 1652797 A1 SU1652797 A1 SU 1652797A1 SU 894703280 A SU894703280 A SU 894703280A SU 4703280 A SU4703280 A SU 4703280A SU 1652797 A1 SU1652797 A1 SU 1652797A1
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- SU
- USSR - Soviet Union
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- pipe
- wall thickness
- section
- center
- length
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
Изобретение относитс к области технических измерений. Цель - повышение точно сти. Способ включает следующие действи . Определ ют положение центра т жести трубы. Замер ют рассто ни И и 2 от центра т жести трубы до ее торцов. В поперечном сечении измер ют наружный диаметр D трубы и толщины S стенки в нескольких равноотсто щих друг от друга точках, расположенных по окружности сечени , и, определив среднеарифметическую величину толщины S стенки, вычисл ют величину продольной разностенности трубы по математической зависимости. 1 ил.This invention relates to the field of technical measurements. The goal is to increase accuracy. The method includes the following steps. The position of the center of gravity of the pipe is determined. The distances And and 2 are measured from the center of the pipe body to its ends. In the cross section, the outer diameter D of the pipe and the wall thickness S are measured at several points equally spaced from each other, located around the circumference of the section, and having determined the arithmetic average value of wall thickness S, the value of the longitudinal difference of the pipe thickness is calculated from the mathematical relationship. 1 il.
Description
9ЧКГ9CKG
ш шsh w
ц. т.c. t.
о сгabout sg
IN:IN:
sjsj
ч:h:
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Изобретение относитс к техническим измерени м.This invention relates to technical measurements.
Цель изобретени - повышение точности определени за счет того, что измерени , на основании которых определ етс величина продольной разностенности трубы , провод тс в середине трубы, где в отличие от ее концов существенные искажени линейной закономерности изменени средней толщины трубы отсутствуют.The purpose of the invention is to improve the accuracy of determination due to the fact that measurements, on the basis of which the magnitude of the longitudinal difference of the pipe is determined, are carried out in the middle of the pipe, where, unlike its ends, there are no significant distortions of the linear pattern of variation in the average pipe thickness.
На чертеже схематически показана прокатна труба, разрез.The drawing shows schematically the rolling tube section.
На чертеже прин ты следующие обозначени : ц.т. - центр т жести трубы; D - диаметр трубы в поперечном сечении, проход щем через ее центр т жести; S - средн толщина трубы в том же сечении; И и 2 рассто ни от центра т жести трубы до ее торцов; д - величина продольной разностенности .In the drawing, the following notation is accepted: c.t. - center of the body of the pipe; D is the diameter of the pipe in cross section passing through its center of gravity; S is the average pipe thickness in the same section; And, and 2 distances from the center of the body of the pipe to its ends; d - the value of the longitudinal delta.
Способ определени величины продольной разностенности трубы заключаетс в следующем,The method for determining the longitudinal delta tube magnitude is as follows.
Определ ют положение центра т жести трубы, например на ножевой подставке, в поперечном сечении трубы, проход щем через эту подставку при равновесном положении трубы, определ ют наружный диаметр трубы и толщины стенок в нескольких точках , равноотсто щих друг от друга по окружности поперечного сечени , например при помощи ультразвукового толщиномера, определ ют среднюю толщину стенки трубыThe center of gravity of the pipe is determined, for example, on a knife stand, in the cross section of the pipe passing through this stand at the equilibrium position of the pipe, the external diameter of the pipe and wall thickness are determined at several points equally spaced apart from each other along the circumference of the cross section For example, using an ultrasonic thickness gauge, determine the average wall thickness of the pipe.
00
5five
s-ifs-if
i 1 пi 1 p
где п - число замеров;where n is the number of measurements;
Si - величина 1-го замера.Si is the value of the 1st measurement.
Измер ют рассто ни И и 1г от центра т жести трубы до ее торцов и вычисл ют величину продольной разностенности трубы по формулеThe distances And and 1g are measured from the center of the body of the pipe to its ends and the longitudinal difference thickness of the pipe is calculated by the formula
. j i r -i - s sTjiiiij-v,. j i r -i - s sTjiiiij-v,
3 (ll 4ll У3 (ll 4ll
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU894703280A SU1652797A1 (en) | 1989-06-08 | 1989-06-08 | Method of length-wise pipe wall thickness non-uniformity determination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU894703280A SU1652797A1 (en) | 1989-06-08 | 1989-06-08 | Method of length-wise pipe wall thickness non-uniformity determination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1652797A1 true SU1652797A1 (en) | 1991-05-30 |
Family
ID=21453256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU894703280A SU1652797A1 (en) | 1989-06-08 | 1989-06-08 | Method of length-wise pipe wall thickness non-uniformity determination |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1652797A1 (en) |
-
1989
- 1989-06-08 SU SU894703280A patent/SU1652797A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Столетний М.Ф.. Кленнерт Е.Д. Точность труб. М.: Металлургиздат, 1975. с. 62- 66. * |
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