Liquid pressure-stabilizing device with water tower pressure-stabilizing effect

Abstract

The invention relates to liquid flow rate metering equipment and in particular to a liquid pressure-stabilizing device with a water tower pressure-stabilizing effect. The device comprises a pressure-stabilizing container I, wherein a liquid inlet pipe and a liquid outlet pipe are arranged at the sidewall lower part of the pressure-stabilizing container I; the liquid inlet pipe is connected with awater pump which is driven by a motor; the top of the pressure-stabilizing container I is provided with an air-release valve and a pressure gage. The device further comprises a pressure-stabilizing container II, wherein the top of the pressure-stabilizing container II is provided with an air-release valve and a pressure gage, and the bottom of the pressure-stabilizing container II is provided with a liquid discharge pipe. An overflow pipe is arranged at the sidewall upper part of the pressure-stabilizing container I; the other end of the overflow pipe is connected with the pressure-stabilizing container II; the top of the pressure-stabilizing container I is communicated with the top of the pressure-stabilizing container II through an air inlet pipe, and the air inlet pipe is simultaneously connected with an air source. According to the invention, the two mutually-communicated pressure-stabilizing containers are provided, and pressure stabilization can be realized without big pressure-stabilizing containers by using a water tower pressure-stabilizing principle, thus the liquid pressure-stabilizing device with the water tower pressure-stabilizing effect has the characteristics of small space occupation, good pressure-stabilizing effect and low cost of investment.

Description

technical field [0001] The invention relates to a liquid flow metering device, in particular to a liquid pressure stabilizing device with the effect of stabilizing the pressure of a water tower. Background technique [0002] In the detection and calibration process of flow metering instruments, the stability of liquid flow is very important, and the key factor that determines the flow stability is the output pressure of the liquid. In order to ensure that the output pressure of the liquid in the container is in a stable range, it is necessary to Liquid is stabilized. Now the commonly used methods of stabilizing voltage include water tower stabilizing method, container stabilizing method, frequency conversion speed regulation method, etc. Among them, the water tower stabilizing method uses the overflow tank on the top of the tower to keep the liquid level constant and realizes stabilizing. Although this method The pressure stabilization effect is good, but because the liquid...

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Problems solved by technology

Now the commonly used methods of stabilizing voltage include water tower stabilizing method, container stabilizing method, frequency conversion speed regulation method, etc. Among them, the water tower stabilizing method uses the overflow tank on the top of the tower to keep the liquid level constant and realizes stabilizing. Although this method The pressure stabilization effect is good, but because the liquid source pressure is limited by the height of the tower, to achieve a higher accuracy of the liquid source pressure, a large water tower is required, resulting in a large space occupied by the water tower and high investment costs

Now the commonly used container pressure stabilization method uses a closed pressure stabilization container to realize the closed-loop adjustment of the gas path, so that the liquid level is constant and the pressure is stabilized. Although this method increases the pressure of the liquid source, the stability of the liquid is not high. It tends to buffer effect, so it is not suitable for the situation with high flow stability requirements

In addition, the frequency conversion speed regulation method has high requirements on the frequency-flow characteristics of the liquid pump, which is easy to generate interference signals

There are more or less defects in the commonly used pressure stabilizing methods, so there is an urgent need for a liquid pressure stabilizing device that can overcome the above defects

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