Method and device for testing frictional drag coefficient of inner wall of pipeline

Abstract

The invention discloses a device for testing a frictional drag coefficient of an inner wall of a pipeline. The device consists of a high speed fan, a frequency converter, a turbulence smoothening section, a pipeline bracket, the pipeline, a multitube pressure gauge, a Pitot tube and a slanting leg manometer, wherein the frequency converter is connected with the high speed fan; the front end of the turbulence smoothening section is connected with the outlet of the high speed fan, and the rear end is connected with the pipeline; the pipeline is arranged on the pipeline bracket with an adjustable mechanism; pressure testing holes are processed at different positions of the pipeline and are connected with the multitube pressure gauge through tee joints and hoses; and at the tail end of the pipeline, the wind speed in the pipeline is tested by the Pitot tube, and the Pitot tube is connected with the slanting leg manometer. A method for testing the frictional drag coefficient of the inner wall of the pipeline comprises the following six steps of: 1, selecting a testing scheme; 2, selecting a testing means; 3, distributing the pressure testing holes; 4, analyzing the experimental accuracy; 5, designing and manufacturing the pipeline bracket; and 6, assembling the testing device, wiring and debugging. The invention has application value in the technical field of pipeline pressure and friction drag testing.

Description

technical field [0001] The present invention relates to a method and device for testing the frictional resistance coefficient of the inner wall of a pipeline, more particularly, it refers to a method for calculating the frictional resistance coefficient of the inner wall of the pipeline by using the method of testing the pressure at different positions of the pipeline and the gas flow velocity at the end of the pipeline method, and designed and processed a whole set of test equipment, which belongs to the technical field of pipeline pressure and friction resistance testing. Background technique [0002] During the transportation of natural gas pipelines, almost all the power of the pumping station is used for the frictional resistance of the inner wall of the pipeline. Therefore, in the process of power design of the pumping station, the frictional resistance coefficient of the inner wall of the pipeline is the key factor in the design. How to quickly, efficiently and accurat...

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Problems solved by technology

[0003] The high-speed wind tunnel is a method to test the frictional resistance coefficient of the inner wall of the pipeline, but the cost of the wind tunnel is very high, and in the process of the test, the straightness, roundness, cylindricity, verticality, deflection, etc. The requirements are very high, and the frictional resistance coefficient of the inner wall of the pipeline cannot be tested quickly and accurately. Therefore, new testing methods and means need to be developed, researched and discussed.

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