Method for implementing open-channel flow measurement by mechanical structure

Abstract

The invention provides conversion which converts the flow speed of water flow into the rotational speed Omega of an impeller by a rotation impeller, and realizes the conversion from the rotational speed Omega of an input shaft to the rotational speed hOmega of an output shaft. The h value is sent to a variable speed case by utilizing a liquid level meter to measure the liquid level h and by mechanical connection so as to realize the conversion the rotational speed from Omega to hOmega. A flowmeter manufactured according to the invention has the following characteristics: no power is used in the calculating process, the flowmeter does not rely on external conditions, is not affected by external interference and thunder and light, and is not interfered by noise. As long as the selection of manufacturing material is appropriate, the manufacturing technique is reasonable and the mechanical structure is not damaged, the flowmeter can stably work for a long term.

Description

technical field [0001] The invention relates to flow measurement, especially a metering system using a purely mechanical structure, which is used for a long-term uninterrupted flow metering method in which the cross-sectional area of ​​the fluid flow is in a changing state such as a canal. Background technique [0002] The flow measurement of water canal is a classical measurement problem, and water canal is one of the main ways of water transmission, and it is also the most economical way. As long as the conditions are possible, for water intake and drainage, especially for enterprise wastewater discharge, most of them use open channels for discharge. Today, energy conservation, emission reduction, and energy conservation are long-term national policies, and the measurement and monitoring of various water intake and sewage discharge become indispensable. basic matters. [0003] There are many traditional open channel flow measurement methods, among which the standard cross...

AI Technical Summary

Problems solved by technology

[0009] ①It must be measured with electricity, once the power is cut off, the measurement must be stopped, so extraordinary measures must be taken to ensure the uninterrupted power supply of the swallow meter, and the open channel metering such as sewage metering is often located in a harsh environment, the power supply condition is not good, and a simple UPS power supply is not enough to guarantee The continuity of the power supply, the damage of the line, and poor contact will all cause the measurement to stop

[0010] ②Vulnerable to external noise interference

At present, the focus of open channel flow measurement is the sewage discharge measurement of enterprises, and there are often serious noise sources in industrial and mining enterprises. Due to the complex noise spectrum, it is easy to interfere with the ultrasonic transducer and make the measurement invalid.

[0011] ③Vulnerable to lightning attack

Since Yanji is mostly installed in the open area, and there is no lightning protection device nearby, Yanji, as an intelligent weak current device, is extremely vulnerable to damage caused by lightning attacks

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