A passive piston volumetric tube with flip valve plug

Abstract

The invention discloses an overturning valve plug-type passive piston volume pipe, relating to a passive piston volume pipe which belongs to the field of liquid flow measurement. The overturning valveplug-type passive piston volume pipe comprises a cylinder body, a piston system and a return mechanism. The overturning valve plug-type passive piston volume pipe further comprises a lower ejection rod and an upper ejection rod. The lower ejection rod is used for ejecting an overturning valve plug open when the piston system moves at the downstream extreme position. The upper ejection rod enablesthe overturning valve plug to be closed when the piston system moves at the upstream extreme position. The piston system can operate in the cylinder body in a reciprocating manner so that continuousmeasurement of flow is achieved. The piston system comprises an overturning valve plug mechanism, a piston, a piston rod and a piston sealing part. The overturning valve plug mechanism comprises a torsion spring, the overturning valve plug, a rotary shaft and a sealing ring. In order to resolve the technical problem, loss of pressure and state transition impact during operation of the passive piston volume pipe are reduced and a return process is prevented from climbing. Therefore, the requirement for measurement accuracy of the passive piston volume pipe is ensured and service lifetime of equipment is prolonged.

Description

technical field [0001] The invention relates to a passive piston volumetric tube, in particular to a passive piston volumetric tube for liquid flow measurement, which belongs to the field of liquid flow measurement. Background technique [0002] The passive piston volumetric tube is mainly used for the measurement of liquid flow such as petroleum products, and it is a liquid flow standard device of the volumetric method. It consists of a cylinder, a piston system, a return mechanism, etc. During the working process, the piston system reciprocates under the alternating action of the working medium and the return mechanism. [0003] At present, on the passive piston volume tube, the spring poppet valve mechanism is used to control the opening and closing of the valve plug. Usually, in order to ensure the sealing performance of the valve plug in the closed state, this mechanism will make it difficult to open the valve plug, and the pressure loss in the open state is high, whic...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the prior art passive piston volumetric tube with large pressure loss changes, large state transition impact, and crawling during the return process, the technical problem to be solved by the passive piston volumetric tube with flip valve plug disclosed by the present invention is: Small passive piston volumetric tube pressure loss and state transition impact during operation, and can avoid crawling during the return process, thereby ensuring the accuracy of passive volumetric tube flow measurement and prolonging the service life of the equipment

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