SU1645828A1 - Liquid and gas flow meter - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure the flow of liquids and gases transported through a pipeline with full filling of the cavity cavity with the measured medium. The aim of the invention is to improve the reliability of flow measurement. The measured medium enters the sensing element 2 and is divided into two streams, part of the stream penetrates above the sensitive element 2, and some under it. As a result of the pterygoid shape of the sensing element, a lift force is created proportional to the flow rate of the medium. A useful signal is transmitted through a rod rigidly connected to the end of the pterygoid element to the transducer. 2 Il.

Description

Phage.1

The invention relates to a measurement technique and can be used mainly for measuring the flow rate of liquids and gases transported through a pipeline with full filling of the cavity cavity with the measured medium.

The purpose of the invention is to increase the reliability of measuring the flow rate of media with different physical properties over the entire range of variation of the measured flow rate.

In Fig.1 schematically shows the proposed flow meter, a longitudinal section; Fig. 2 shows the hinge axis of the sensitive element, cross section.

The flow meter comprises a cylindrical body 1 in which a sensitive element 2 is placed, made with a sectional profile in the shape of a wing. The sensing element 2 is installed along the horizontal axis of the housing 1 and pivotally fixed to two semi-axes 3 in the housing 1.

Two coaxially arranged tubes: outer 4 and inner 5, are installed with the possibility of relative movement. One ends of the tubes 4 and 5 are rigidly connected to the sensing element 2 at the point 6 of the longitudinal axis of the pipeline, as far as possible from the hinge 3 of the sensing element 2. The outer tube 4 is connected to the inner surface of the housing 1 by means of a bellows 7. The opposite ends of the tubes 4 and 5 are articulated on the outer side of the housing 1 with the converter 8. The output signal of the converter 8 is fed to the secondary

measuring device 9. for example strain gauge.

The flow meter works as follows.

The measured medium enters the sensitive element 2 and is divided into two streams, a part of the flow flows above the sensitive element 2, and a part below it. As a result of the corresponding cross-sectional shape of the sensing element 2, a pressure differential is applied, the resultant of which, in the form of a lifting force, is directed perpendicular to the flow of the measured medium. The pressure generated by the lift is transmitted

the inner tube 5 to the transducer 8, for example, a strain gauge, the electrical signal from which is fed to the secondary measuring device 9.

Claims (1)

Invention Formula A flowmeter for liquids and gases, comprising a housing with a pterygoid sensing element mounted on a rotary shaft passing through it the thickened part, and the converter, which is connected with the fact that, in order to increase reliability, the rotary shaft is placed in the internal bores of the housing, and the sensing element is located along the horizontal axis of the housing and is rigidly connected at the point of maximum distance from the rotary shaft coaxially arranged tubes, with the inner tube connected to the transducer, and external through the bellows - with the inner surface of the case. W