SU1590707A1 - Method of determining hydraulic drag of pipeline systems - Google Patents
Method of determining hydraulic drag of pipeline systems Download PDFInfo
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- SU1590707A1 SU1590707A1 SU884445520A SU4445520A SU1590707A1 SU 1590707 A1 SU1590707 A1 SU 1590707A1 SU 884445520 A SU884445520 A SU 884445520A SU 4445520 A SU4445520 A SU 4445520A SU 1590707 A1 SU1590707 A1 SU 1590707A1
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- USSR - Soviet Union
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- pipeline
- corrections
- hydraulic resistance
- testing
- pressure
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- Pipeline Systems (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Изобретение может быть использовано в гидромашиностроении, теплоэнергетике. Цель изобретени - повышение точности и сокращение времени испытаний при определении гидравлического сопротивлени трубопроводных систем. Определ ют потери напора по длине трубопровода с учетом поправок на положение измерителей давлени . По значению потерь определ ют коэффициент гидравлического сопротивлени согласно известному выражению. Поправки на положение измерителей определ ют одновременно с потер ми напора при двух режимах по расходу рабочей среды. Целесообразно при испытани х выбирать значени расходов, отличающихс на 20%. Способ дает возможность сн ти параметров без организации специальных испытаний в статическом режиме.The invention can be used in hydraulic engineering, power system. The purpose of the invention is to improve the accuracy and reduce the time of testing in determining the hydraulic resistance of pipeline systems. The pressure losses along the length of the pipeline are determined with allowance for corrections to the position of the pressure gauges. The loss coefficient is used to determine the hydraulic resistance coefficient according to the well-known expression. Corrections for the position of the meters are determined simultaneously with the pressure losses in two modes according to the flow rate of the working medium. When testing, it is advisable to choose values for costs that differ by 20%. The method makes it possible to remove parameters without organizing special tests in a static mode.
Description
Изобретение относитс к гидравлическим испытани м, в частности к способам определени гидравлического сопротивлени гидромагистралей, и мо- жет быть использовано в гидромашиностроении , теплоэнергетике при испытани х средств транспортировани жидкости и газов.The invention relates to hydraulic tests, in particular, to methods for determining the hydraulic resistance of hydraulic lines, and can be used in hydraulic engineering and heat and power engineering when testing means for transporting liquids and gases.
Цель изобретени - повьштение точности и сокращение времени испытаний .The purpose of the invention is to increase accuracy and reduce test time.
Способ определени гидравлического сопротивлени трубопроводных систем заключаетс в том, что при испытании определ ют потери напора по длине трубопровода с учетом поправок на положение измерителей давлени , по значению которых определ ют коэффициент гидравлического сопротивлени согласно выражени , напримерThe method for determining the hydraulic resistance of pipeline systems consists in the fact that, during the test, pressure losses are determined along the length of the pipeline, taking into account the corrections to the position of the pressure gauges, the value of which determines the hydraulic resistance coefficient according to the expression, for example
ЛL
1 57-10 1 57-10
° ( 1 -Р-- .,1 ..,, сл ° (1 -P--., 1 .. ,, cl
о about
sjsj
о about
-2-2
.LlLl.Llll
11.-eleven.-
J J
1,58 -10 -D1.58 -10 -D
гре Л - коэффициент гидравлического сопротивлени ;gre L - coefficient of hydraulic resistance;
Dg - внутренний диаметр трубопровода;Dg - internal diameter of the pipeline;
V - объемный расход рабочей среды;V is the volume flow rate of the working medium;
значение давлени в начальной и конечной точках трубопровода;pressure value at the start and end points of the pipeline;
поправки на положение измерителей давлени в соответствующих начальной и конечной точках трубопровода; плотность воды при температуре испытаний;JQ сумма коэффициентов местныхcorrections for the position of the pressure gauges at the corresponding start and end points of the pipeline; water density at test temperature; JQ is the sum of local
сопротивлений;resistances;
длина Испытываемого трубопровода ,Test Pipeline Length
поправки на положение изме- 15 авлени определ ют одновреотер ми напора при двух рерасходу рабочей среды,расих по формулеCorrections for the position of the measurement are determined by simultaneous pressure at two re-consumption of the working medium, according to the formula
- «-- ) 20 - "-- ) 20
Н : -1N: -1
полный напор в начальном узле участка;full head at the initial site of the site;
1 отношение квадратов1 ratio of squares
объемных расходов рабочей жидкости при первом и втором режимах испытани , соответственно;volumetric flow rates of the working fluid in the first and second test modes, respectively;
соответственно значени манометрических напоров в на- чатьной и конечных точках испытуемого трубопровода при первом и втором режимахrespectively, the value of the manometric pressure in the inlet and end points of the test pipeline in the first and second modes
2525
30thirty
3535
5 five
00
5five
00
5five
испытани по расходу,причем значени Н и Н | соответствуют режиму с большим расходом.test flow, and the values of H and H | correspond to the regime with high consumption.
Целесообразно при испытани х выбирать значени расходов, отличающихс между собой на 20%.When testing, it is advisable to choose values for costs that differ from each other by 20%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884445520A SU1590707A1 (en) | 1988-05-24 | 1988-05-24 | Method of determining hydraulic drag of pipeline systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884445520A SU1590707A1 (en) | 1988-05-24 | 1988-05-24 | Method of determining hydraulic drag of pipeline systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1590707A1 true SU1590707A1 (en) | 1990-09-07 |
Family
ID=21383401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU884445520A SU1590707A1 (en) | 1988-05-24 | 1988-05-24 | Method of determining hydraulic drag of pipeline systems |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1590707A1 (en) |
-
1988
- 1988-05-24 SU SU884445520A patent/SU1590707A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Инструкци по эксплуатации тепловых сетей. - М.: Энерги , 1972, с. 229-238. * |
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