Liquid flow metering device

Abstract

The invention discloses a liquid flow metering device which is composed of a water storage circulating device, a surge tank, a flow adjusting device, a weighing device and the like.The water storage circulating device comprises a water storage pond with a water storage pond water inlet pipe and a water storage pond water outlet pipe, a variable frequency motor and a water suction pump.The flow adjusting device comprises a first main pipeline, a second main pipeline, a third main pipeline, a fourth main pipeline, a first branch pipeline and a second branch pipeline.The weighing device comprises a first large container, a low-self-weight weighing device, a second large container, a low-self-weight weighing device, a third large container and a low-self-weight weighing device which are sequentially connected in series.The whole device is designed and manufactured strictly according to relevant national verification regulations, design requirements and manufacturing standards.The accuracy and reliability of quantity value transfer can be guaranteed better, and complex labor and shutdown waiting in the process of dismounting and mounting during standard meter verification are omitted.

Description

technical field [0001] The invention relates to the technical field of instrument measurement, in particular to a liquid flow measurement device. Background technique [0002] Liquid flow metering devices are widely used in the detection and calibration of liquid flow meters. Liquid flow metering devices can be divided into four types according to the classification of measuring instruments: mass method, volumetric method, standard meter method and volumetric tube method. [0003] In the clamping device of the traditional liquid flow metering device, a one-way clamping device with a limited stroke is generally used in combination with a pipeline puppet to realize the verification and installation of flowmeters with the same caliber but different lengths. Because depending on the type of flowmeter, the length of the flowmeter varies greatly (generally, the vortex flowmeter is the shortest, and the ultrasonic flowmeter is the longest. With the increase of the caliber, the len...

AI Technical Summary

Problems solved by technology

However, there are two operational disadvantages in this process: first, the operation of replacing the short section of the pipeline is cumbersome, increases the alignment error of the pipeline, and reduces the detection efficiency; second, the connection links increase during the installation of the flowmeter, which is prone to leakage

This method has two disadvantages: first, due to the large amount of liquid stored in the manifold plus the verification pipeline, it takes too long to drain water after the verification of each flowmeter; The valves in the pipelines need to be closed. During the drainage process, as the internal pressure of the pipeline decreases (it is easy to form a vacuum), the drainage speed will be significantly reduced and the liquid in the pipeline cannot be drained.

However, the force-bearing structure of the square box type weighing container is not as good as that of the cylindrical type, and there will be obvious deformation in the process of containing the test liquid

Causes vibration in the weighing process of the electronic scale, prolongs the time for weighing to wait for a stable reading, and reduces the efficiency of the verification flowmeter

If simply relying on the method of strengthening the outer ribs of the box to improve the stress of the box, it will increase the weight of the weighing container and reduce the effective weighing range of the electronic scale.

Images