Piston type gas-liquid dual-purpose micro-flow standard device

Abstract

The invention relates to a piston type gas-liquid dual-purpose micro-flow standard device, comprising a vertically-reversed piston cylinder, wherein the piston cylinder is connected with an upper end piston cylinder cover; the piston cylinder or the piston cylinder cover is fixed on a bearing bracket; the piston cylinder cover contains a cross-shaped four-way connector; one connector in a horizontal direction of the cross-shaped four-way connector is connected with a water tank through a water inlet pipe valve; the other connector in the horizontal direction is connected with a detected liquid flow meter through a water outlet pipe valve; the vertical upward connector is connected with a transition container internally provided with an oil-water separating layer through a transition container valve; a gas outlet is arranged above an oil face of the transition container; and the gas outlet can be connected with a detected gas flow meter; and the top of a piston is inserted into the piston cylinder and the piston is driven by a linear module to move up and down. According to the invention, two different gas or liquid medium flow meters can be detected by the same set of the standard device; and an outer diameter of the piston is used as an effective measurement diameter and a machining precision is easy to improve, so that the detection precision is improved and the whole structure of the device is small and simple.

Description

technical field [0001] The invention relates to a micro-flow standard device, in particular to a piston-type gas-liquid dual-purpose micro-flow standard device, which belongs to the technical field of measuring instruments. Background technique [0002] The verification of liquid micro-flow meters in the prior art mainly uses electronic scales or burettes as a standard, and the method of manually pressing the stopwatch is used for detection. This method has a large human error and a low degree of automation; Electronic soap film flowmeters are mainly used, but due to the influence of soap film bubble shape, soap film edge thickness change, pipe wall residue and water vapor, the measurement accuracy is low and the measurement time is long. The piston-type flow standard device has the advantages of high accuracy and easy automation, but the traditional piston-type flow standard device has a complex structure, many moving parts, long overall distance of the device, inconvenient...

AI Technical Summary

Problems solved by technology

[0003] The technical problems solved by the present invention are: to solve the problem of low precision in verifying micro-flowmeters in the prior art, and it is difficult to realize automation; the traditional piston-type flow standard device has complex structure, many moving parts, complex operation, long overall distance of the device, and difficult transportation. Convenience, high requirements for mechanical processing, low precision; only one kind of gas or liquid flow meter can be verified and other related technical problems

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