SU278408A1

SU278408A1 - Meter of low concentrations of fibrous suspensions

Info

Publication number: SU278408A1
Application number: SU6701181189A
Authority: SU
Inventors: З.А. Михарс; В.А. Храбов; И.Р. Канепс; П.Л. Корольков; И.Е. Вьюков; А.С. Сушко
Priority date: 1967-08-12
Filing date: 1967-08-12
Publication date: 1979-01-05

Description

Изобретение относитс к измерител м малых концентраций волокнистых суспен™ зий н может быть использовано в целлк лозно-бумажной промышленности.The invention relates to a meter for low concentrations of fibrous suspensions and can be used in the pulp and paper industry.

Известны измерители малых концентраций волокнистых суспензий, включающие ультразвуковой датчик, генератор ультразвуковых колебаний, выполненный в виде камеры с излучателем и приемником ультразвуковых колебаний, генератор ультра- звуковых колебаний и нреофазовательно усилительную систему.Measuring instruments for low concentrations of fiber suspensions are known, including an ultrasonic sensor, an ultrasonic vibration generator, made in the form of a chamber with an emitter and receiver of ultrasonic vibrations, an ultrasonic vibration generator, and a phase-amplifying system.

Отличительной особенностью предлагаемого измерител вл етс то, что он вы полАен с нереливным сосудом, обеспечивающим ламинарность и посто нство скорости потока в зоне ультразвукового датчика, а излучатель и приемник ультразвуковых колебаний выполнены в виде пьезоэлемеН тов, изолированных от волокнистых суспензий пластинами из материала, имеющего температурный коэффициент поглощени ультразвука, противоположный по знаку температурному коаффициенту поглощени A distinctive feature of the proposed meter is that it is made with a non-transfer vessel, which ensures laminariness and constancy of the flow rate in the zone of the ultrasonic sensor, and the transmitter and receiver of ultrasonic vibrations are made in the form of piezoelements isolated from fiber suspensions by plates made of material having a temperature ultrasound absorption coefficient, opposite in sign to the temperature absorption coefficient

дл измер емой среды. Это позвол ет повысить надежность работы.for measuring medium. This allows for improved reliability.

На чертеже изображена схема предлагаемого измерител .The drawing shows a diagram of the proposed meter.

Он состоит из ультразвукового датчн ка, включающего в себ камеру 1, пьезоэлемент-излучатель 2 и пьезоэлемент -прн- емник 3; генератора ультразвуковых колебаний , содержащего генератор 4 синусоидальных колебаний, генератор 5 пр моугольных импульсов и смеснтель 6; приемного дхресгбразовательно-усилительного устройства 7; регистрирующего прнбора 8 и переливного сосуда 9. Измеритель включает также линии iO, 11, 12 потока массы, соответственно переливную н основную.It consists of an ultrasonic sensor, which includes camera 1, piezoelectric transducer 2, and piezo equipment 3; an ultrasonic vibration generator comprising a generator of 4 sinusoidal oscillations, a generator of 5 rectangular pulses, and a mixer 6; receiving dhresgruzatelno-amplifying device 7; recording equipment 8 and overflow vessel 9. The meter also includes iO, 11, 12 lines of mass flow, respectively, overflow and main flow.

Измеритель работает следующим образом .The meter works as follows.

Claims

Along the flowline 10, the measured mass enters the overflow vessel 9, in which a constant pressure is created. The overflow along line 11 is directed to the main stream. From the overflow vessel, the mass with the no-flow rate of discharge flows into the chamber 1 of the ultrasonic sensor. Rectangular pulses with high-frequency sinusoidal fillings, corresponding to the fundamental frequency of the piezo-element or its harmonics, are supplied to the piezoelectric element-emitter 2 from the generator of ultrasonic vibrations. The intensity of the ultrasonic vibrations as a result of passing through the measured medium is reduced. Piezo Element 3) The speaker 3 converts attenuated sound vibrations into electrical ones, which are fixed with a recording amplifier 8 using a conversion amplifier device 7, as a defined degree of concentration of the measured medium. From the sensor through line 12, the mass enters the main stream. In order to influence the concentration of the fiber suspension, if necessary, in order to ensure the concentration and flow stability, a meter can be provided in the meter that converts the meter signals into a standard electrical output signal, which allows automatic control devices to be connected to the neobtimke meter. The invention The measuring instrument of low concentrations of fibrous suspensions, which includes an ultrasound transducer, an ultrasonic vibration generator, made in the form of a chamber with a radiator and a receiver of ultrasonic vibrations, an ultrasonic camera generator. Swinging and conversion-amplifying system, characterized in that, in order to increase the reliability of operation, the meter is made with an overflow vessel providing laminariness and stability of the flow velocity in the zone of the ultrasonic sensor, and the emitter and receiver of ultrasonic vibrations are made in the form of piezoelectric elements isolated from suspensions with plates made of a material having an ultrasound temperature absorption coefficient that is opposite in sign to the temperature absorption coefficient for the measured medium s. 2