SU717542A1 - Vertical flowmeter - Google Patents

Description

(54) VORTEX FLOW METER

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The invention relates to a measuring technique, namely a device for measuring the flow of liquids and gases.

Vortex flowmeters are known using the rotation of a measured body flow, which are protected from noise and disturbances propagating along the stream and coming from outside. at

A vortex flowmeter is known, in the expanding region of the forming tube of which two nozzles of different lengths are introduced, transmitting oscillations of speed and pressure caused by the vortex formations to the Sensitive element of the transducer 1. A vortex flowmeter is known in which the transducer is placed in a protective casing with openings and a diaphragm between them 2.

There is a known vortex converter having two converters, vortex oscillations, which are included,. Differential 3.

All these devices are protected from pulsation noise.

Known flowmeter protection Chuv. elements in which is implemented by a protective net 4.

A vortex flowmeter is known in which protection against vibration interference is carried out by means of differential activation of two transducers, of which one is taken out of the area of reformation and perceives only the background noise, and the other perceives the useful signal and noise.

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The closest to the technical essence of the proposed is a vortex flowmeter, in which the noise protection associated with pressure and flow rate pulsations, as well as vibration of the pipeline and the flowmeter body, is carried out by optimally positioning and connecting the sensitive elements, transducers, using receiving channels special form converters b.

The known devices Cl, 2,3, 4,5 and 6 improve the ratio of the useful signal to noise, but at the same time reduce the level of the signal containing information, since they have a compensatory principle of construction. Reducing the level of the useful signal leads to a reduction in the range of measured expenditures . The purpose of the invention is to increase the useful and dissecting diapason of measured expenditures. This is the way; that — in the proposed consumption of riWeNiHijeKaial of sDaDyayyy pdLnm cactors with a cylinder of diameter equal to them with a trapezoidal yrez in terms of; The angle at the apex of the trapezoid is greater than the angle of the conical region of the nozzle; the side of the cylinder, directed downstream, has a regular cut-out, the axis of which coincides with the axis of the forming nozzle. The drawing shows the proposed flow meter; -; -: The flow meter contains case 1 with a forming nozzle 2,; ZH expanding part 3 of which leaves receiving channels 4 of converters 5. Receiving channels 4 are connected by a hollow cylinder b with a trapezoidal and correct 8 cuts. - Device the next pre-swirling flow enters the forming nozzle 2 In the expanding region 3 the rotating flow processes relative to the bruce of the housing 1, alternately blocking the right or left side of the notch 7 of the cylinder 6. Pulses Tel'nykh pressure. alternately, bothering the receiving cable 4 to converters 5 ..; The larger the signal is, the greater: the separation by dynamic pressure and a limp pressure in the cross section of the processing jet. Trapezoidal notch 7 in the cylinder b allows to increase the receiving area; , slice and bruise the selection of high-frequency oscillations from the region of maximum intensity of these oscillations, since the greatest aa | Yenjyo Tyo Sechenyyuvra tayuschego PTSKA nakhshz It is given in its place, located from the axis of the stream and a distance of 0.5 radius. In this area, pressure is reduced in comparison with peripheral ones. In UT 15 The presence of cut-out 7, which is stretched over the cross section, allows yroydizvodytg selection pressure from the area. I, where there is the greatest: pressure drops. in a whirlwind. Cutout 7 bo turned

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Claims (6)

   717542 | base of the trapezium upstream, which ensures the forced filling of the receiving channels with the measured medium and eliminates the possibility of What are the causes of stagnant zo. To reduce the hydraulic resistance of the device on the side of the cylinder 6 downstream, a notch of regular shape 8 was made, the maximum dimensions of which are limited by the points of displacement of the longer sides of the trapezium with the shape of the cylinder in the plane of the notch axis. ycTporicTjBo allows you to raise the level of the output signal and thereby expand the range of measured flow rates. Claim Vortex Flowmeter containing fFrMpipepipes, in the conical expanding part of which the receiving channels of two transducer emitters are inserted from opposite sides, I distinguish J, i that, in order to increase the useful signal and expand the range of the measured flow, the receiving channels of the transducers an inner diameter equal to them with a trapezoidal cutout in terms of, when the trapezoid is straight, it is directed with a large base upstream, its length coincides with the points of sections of cylindrical and cinch parts of the forming pipe, angle at. the apex of the trapezoid is larger than the angle of the conical area of the nozzle, and on the side of the cylinder directed downstream, a regular shape cut-out is made, the axis of which coincides with the axis of the forming nozzle, sources of information taken into account in examination 1. US patent 3830104, cl. 73 - 194, 1974. 2. U.S. Patent 3,719,080, cl., 73-194, 1973. 3. US patent number 3279251, class. 73 - 194, 1966. 4. Authors certificate USSR 365570, KJi. G 01 F 1/32, 1971. 5. USSR Authodical Seudelet No. 18111321, cl. G 01 F 1/32, 1965; 6. USSR author's certificate No. 371439, cl. G 01 F 1/32, 1971 (prototype). ; t