SU1226283A1 - Arrangement for determining continuity of double-phase liquid media - Google Patents

Abstract

The invention relates to a measurement technique and mode to be used in the chemical, petroleum, aviation and other industrial sectors. The aim of the invention is to improve the accuracy and expand the functionality of the device by combining the areas of radiation and receiving ultrasonic vibrations and enabling the determination of the gas phase both in a single volume of the two-phase medium and in its flow. The controlled two-phase medium enters the inside of a hollow piezo-ceramic cylinder on the outer surface of which are deposited electrodes of the excitation unit and electrodes of the receiving unit, made in the form of a system of uniformly alternating multiple passages eral bands. The electrical voltage that is applied to the electrodes of the excitation unit causes mechanical oscillations of the piezoceramic cylinder, the phase of which varies depending on the change in the gas content of the controlled medium. The mechanical oscillations of the cylinder are converted into an electrical voltage taken from the electrodes of the receiving unit, which is then supplied to the phase difference meter. 2 Il. from 9 L

Description

one

The invention relates to a measurement technique and can be used in the chemical, petroleum, aviation and other industries.

The purpose of the invention is to improve the accuracy and enhance the functionality of the device.

FIG. 2 shows a diagram of a device for determining the continuity of two phase liquid media; FIG. 2 shows an acoustic transducer of the proposed device.

A device for determining the continuity of two-phase liquid media contains an acoustic transducer and an exciter unit and an ultrasonic vibration receiving unit connected to it. The excitation unit is made in the form of an electric generator 1, the output of which is connected to the electrodes 2 and the input of the phase shifter 3. The receiving unit of ultrasonic oscillations is complete in the form of a meter 4 phase separation, the input of which is connected to the electrodes 5, and the output is connected to the recorder input 6. Other input The phase difference meter 4 is connected to the output of the phase shifter 3. The acoustic transducer is a hollow piezoceramic cylinder 7, on the outer surface of which the electrodes 2 of the exciter unit and the electrodes are metallized 5 rows receiving unit formed in a system of interleaved multiple-uniformly (in this case quadrifilar) spiral strips. The piezoceramic cylinder 7 is fixed using a mixture of 8 (for example, epoxy resin with a piezoceramic filler) in a metal housing 9, included in the rupture of the pipeline 10, through which the test medium 11 flows,

The device works as follows.

The sinusoidal voltage of the generator 1 is applied to the electrodes 2, where it is converted into mechanical oscillations of the piezoceramic cylinder 7. The mechanical oscillations of the cylinder 7 are converted into an electrical voltage removed from the electrodes 5 Depending on the continuity (gas content) of the two phase medium 11, the phase changes forced

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oscillations of the piezocylinder 7, fixed by the meter 4 phase difference,

The amplitude of the voltage of the generator 1 is chosen such that the output voltage j; taken from the electrodes 5 has a sinusoidal shape and is larger than the threshold input voltage of the meter 4 phase difference.

The operating frequency of the converter is selected according to the maximum value of its phase-frequency characteristic when the continuity is changed from 0-100%, the converter is completely filled with liquid without gas, and the co- excite is excited.

5 Lebani with an operating frequency and the required amplitude, adjust the phase difference meter 4 with a phase shifter 3 to zero readings and then calibrate the converter. Then, the converter is mounted in the pipeline 10 with the two-phase medium II under investigation, the phase difference is measured and the continuity is determined by the calibration characteristic

25 (gas content) environment.

The implementation of the electrodes 2 of the excitation unit and the electrodes 5 of the reception unit in the form of a system of evenly alternating multiple spiral bands allows to increase the accuracy of the measurements of the continuity and expand the functionality of the device, since this

with vibrations combined. In addition, such an arrangement of the electrodes makes it possible to detect the presence of a gas phase at any point in the volume of the acoustic transducer as in a single device.

4Q volume of the controlled medium, and in its flow.

Claims (1)

Invention Formula A device for determining the continuity of two-phase liquid media, containing an acoustic transducer, an exciter unit and a receiving unit connected to it, the transducer is made in the form of a hollow piezoceramic t.indra, the internal cavity of which is intended to accommodate a controlled medium, and an electric surface is applied on its outer surface - dashes of an excitation unit and a reception unit, characterized in that, in order to improve accuracy and enhance functionality. J1226283 The electrodes of the excitation unit and the alternating multi-star spiral-receive unit are made in the form of uniform bands. 1 fj