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A method and apparatus for indicating a critical level of liquid flow

A technology of liquid flow and equipment, which is applied in the direction of liquid/fluid solid measurement, volume/mass flow generated by detecting the dynamic effect of fluid flow, and mechanical effect, and can solve the problem of insufficient working life, expensive, large volume of switches or flowmeters And other issues

Active Publication Date: 2016-04-13
BRANNSTROM GRUPPEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The common feature of these prior art is that the switch or flow meter is bulky and expensive
Also, some types of switches or flow meters may be exposed to wear due to the presence of moving parts, resulting in insufficient operating life for them

Method used

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  • A method and apparatus for indicating a critical level of liquid flow

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Embodiment Construction

[0012] In many technical contexts liquid flow is indicated and it is therefore important to establish / determine a certain critical liquid flow, which is neither over nor under / difference, in which case no indication thereof is sent. An example of a practical situation where a lower limit may exist is an application with a liquid analyzer where certain qualities / characteristics in the liquid are to be evaluated. It is obvious that if the liquid flow is too small, then the evaluation of the relevant liquid quality / property will not be performed or will be incorrect. Conversely, it may be the case that if the analysis takes some time, the flow rate must not be too high because the residence time of the liquid in the analyzer will become too short.

[0013] The basic principle / idea on which the present invention is based is that, in the cross-section or length of the conduit, the flow can be laminar at low flow rates or velocities, or turbulent at high flow velocities. Turbulence...

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PUM

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Abstract

A method of indicating the flow rate of a liquid comprising the steps of sensing the difference between laminar and turbulent flow as the liquid flow varies through / through a conduit length (1) that is or includes a restrictor (4,5) The conversion between the liquid flow or the reverse situation, the conversion is used as an indication of the size of the liquid flow. The turbulent flow is sensed via the vibrations generated by the disturbance. An apparatus for indicating flow of a liquid includes a length of conduit through which flow of liquid flows. According to the invention, the conduit length (1) is or includes a restrictor (4, 5) and is connected to a vibration sensor (10). The sensor (10) senses respectively the onset or increase and the cessation or decrease of vibrations which occur at the transition of the liquid flow from laminar to turbulent flow or vice versa.

Description

technical field [0001] The invention relates to a method of indicating the flow of a liquid, and a device for carrying out the method. The apparatus includes a length of conduit through which the fluid flows, and a sensor. Background technique [0002] In many industrial environments and shipboard containers, it is necessary to monitor the magnitude of the liquid flow so that the liquid remains above a minimum critical level. Of course the reverse also applies, ie the liquid flow may not exceed a certain critical level. If such a critical level occurs, eg an alarm signal or other action is required. [0003] There are many different solutions previously known in the art to the problem of monitoring liquid flow so that it does not exceed or fall below a certain critical level. Thus, it is known in the art to use different types of mechanical flow monitoring devices, such as so-called paddle switches. Thermal flow monitoring devices are also previously known in the art. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/66G01F1/20
CPCG01F1/666G01F1/20
Inventor R·布兰斯特罗姆
Owner BRANNSTROM GRUPPEN