SU567956A1 - Flow meter - Google Patents

Description

(54) FLOW METER

The invention relates to a measurement technique that can be used to measure small flow rates of environments in hydroamelioration,

Izaestay flowmeters containing a membrane box with a hole marked in the housing with an opening against which a nozzle is installed in a photomultiplex chamber with a gap is diverted. It is located in the cavity behind the membrane, and the transducer moves “neither the membrane” to the output signal II. However, these flowmeters are characterized by low sensitivity and a small range of “ya”. merenn,

The flowmeters based on the measurement of the alternate pressure reversal were recorded during the twisting of the current, which contained a swirling element, which was completely in the form of a braked propeller impeller, and pressure selectors, dimensioned. The flow meters on the peripheral part of the swirling flow are 2. However, these flow meters are difficult to manufacture and have large hydraulics and 6 resistances

In the GF8SHT.LA flow meter, the chamber has the form of a cylinder, tengendk to which the connection of the supply of 11 tubes is connected; the connection is connected to the front part of this chamber about EE Gct, while the loose tubes of the extraction tubes are placed symmetrically on both sides from the axis of the chamber perpendicular to its face

PLANE,

The drawing shows the layout; about "ivtepa

The flow meter contains the nozzle 1, j of the nest-lenns tangentially in the flat-calico chamber 2, on the axis of which perpendicular to the plane of the chamber 2 by displacing the discharge 3, tube 4, spacer-hg::: on its side, each of them is connected to the corresponding ampoule of the membrane box 6, the membrane 7 of which is connected to the heater 8, its displacement (with a differential pressure gauge).

The flow meter works as follows.

Controlled in the flow of medium, formed by a honeycomb 1 and a jet tangesh ilalno

guided into chamber 2 and swirled. Next, the flow of the medium is discharged through the nozzle 3, the axis of which is perpendicular to the plane of chamber 2. Thus, in the chamber 2, the vortex of the controllable flow occurs and its particles move in a spiral. Due to the conservation of moment of momentum, tangential velocity. the flow increases significantly as the flow approaches the fitting 3. The tube 4 senses the increased pressure of the tangential flow velocity, which increases with increasing particle velocity, and the tube 5, located on the other side of the axis of the chamber 2, is reduced pressure. The pressure difference enters the cavities of the box 6 and is converted by the membrane 7 and the converter 8 to the output signal of the flow meter. With an increase in the flow rate of the controlled flow, this difference increases.

Thus, in this flow meter, the sensitivity is increased and the measurement limits are expanded with simpler means and with less hydraulic losses,

Claims (2)

Invention Formula A flow meter containing a chamber with a poplar lead and a branch pipe and pressure tapping tubes, the free ends of which are connected to the chamber on various of them. The other levels, and the other ends, to the plus and minus cavities of the differential pressure gauge, are characterized by the fact that, in order to simplify the design and decrease the hydraulic resistances, the chamber has The connecting nozzle is connected to the end part of the chamber along its axis, and the free ends of the tubes. The selection of pressure is placed symmetrically on both sides of the wasp chamber perpendicular to its end plane. Sources of information taken into account in the examination: 1, USSR author's certificate No. 387218, cl. a 01 7 d / 20, 1971. 2. USSR author's certificate N9 171129, cl. G 01 F 1/12, 1964. four