Flow resistance test system of valve flow and method for performing little micro flow test by using the same

Abstract

The present invention discloses a flow resistance test system of valve flow and a method for performing a little micro flow test by using the same. The system comprises a water tank, a water pump, a pressurizer, a water collector I, a water separator, a water collector II and a back pressure regulating valve which are connected in order through pipelines. The water collector I is connected with the water separator through a plurality of parallel flow measurement pipelines with different pipe diameters, and flowmeters with different apertures are respectively installed on the flow measurement pipelines; the water separator is connected with the water collector II through a plurality of parallel valve test pipelines with different pipe diameters, and valves with different apertures to be tested are respectively installed on the valve test pipelines; and the water collector II or the pipeline at the downstream of the water collector II is connected with a weighing device which is easy to accurately measure the little micro flow. According to the invention, the flow capability of the flow resistance test system of valve flow may be obtained by measuring the differential pressure through adoption of a Bernoulli equation; the flow resistance coefficient of the flow resistance test system of valve flow may be obtained according to measurement values such as flow velocity, differential pressure and the like; and moreover, the flow capability and the flow resistance coefficient of valves to be tested in various conditions may be accurately measured.

Description

technical field [0001] The invention belongs to the technical field of flow measurement, and in particular relates to a valve flow resistance test system and a small and micro flow measurement method. Background technique [0002] The valve is a fluid control component with a large quantity and a wide range, and is the most numerous resistance component in the process industry. The flow capacity and flow resistance coefficient of the valve are the main performances other than the strength and sealing performance of the valve, and they are also factors that must be considered when the process system design department selects a power device (such as a pump or compressor, etc.). The flow capacity and flow resistance coefficient of the valve are mainly measured by the test device. Scientific and rational design of experimental devices is the prerequisite for accurate measurement of flow capacity and flow resistance coefficient. However, under certain extreme conditions, such as...

AI Technical Summary

Problems solved by technology

Scientific and rational design of experimental devices is the prerequisite for accurate measurement of flow capacity and flow resistance coefficient, but under certain extreme conditions, such as large size and small opening, the existing technology has not yet provided accurate measurement technology for small and micro flow conditions

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