Waterpower quantitative air-entrapping device in fluid experiment

Abstract

The invention discloses a waterpower quantitative air-entrapping device in a fluid experiment. The device comprises a first container, a closed measuring cylinder fixed in the first container, and a second container capable of ascending and descending, wherein the first container and the second container are filled with fluid media, the second container is communicated with the first container through a flexible guide pipe, a drain hole communicated with the first container is formed in the bottom of the closed measuring cylinder, and the top of the closed measuring cylinder is provided with an air intake guide pipe and an air-entrapping guide pipe. Compared with common piston type air-entrapping equipment, the waterpower quantitative air-entrapping device in the fluid experiment has the advantages that water tightness is utilized to prevent gas from being leaked from the edge; meanwhile, the height of the container on a lifting column is changed, gas is transmitted to experiment equipment containing internal pressure through a differential pressure water head, difficulty of manual pressurization is avoided, and stability and maneuverability are greatly improved.

Description

technical field [0001] The invention relates to fluid experiment equipment, in particular to a device for quantitative gas addition in fluid experiments. Background technique [0002] The gas flow standard device uses air as the medium and adopts the negative pressure method. It is mainly suitable for the verification, standard and type evaluation of gas flow meters such as speed type, volumetric type, differential pressure type and mass flow meter, and can also be used for gas flow determination. The gas flow standard device is divided into original standard device and transfer standard device. The original standard device is the highest standard. The original standard device is divided into volume method and mass method, which can also be called dynamic method and static method. For example, the PVTt (pressure, volume, temperature, time) method in the volumetric method belongs to the static volumetric method device, and the bell type, gas volume tube, soap film type, etc....

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Problems solved by technology

One is that the lack of air tightness of the gas causes measurement errors. For example, in ordinary injection type gas filling equipment, due to the air tightness of the piston, the gas is easy to leak from the edge; The third is that if the test equipment injected with gas has a relatively high internal pressure, it will be very difficult to use artificial pressure

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