SU647536A1

SU647536A1 - Primary rate-of-flow transducer

Info

Publication number: SU647536A1
Application number: SU772508110A
Authority: SU
Inventors: Валерий Павлович Граф-тио
Original assignee: Предприятие П/Я Р-6729
Priority date: 1977-07-07
Filing date: 1977-07-07
Publication date: 1979-02-15

Description

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Изобретение относитс к области приборостроени и предназначено дл измерени расхода газов и жидкостей с посто нной температурой.The invention relates to the field of instrumentation and is intended to measure the flow of gases and liquids with a constant temperature.

Известны расходомеры 1J, основанные на зависимости от скорости измер емого потока теплового состо ни приемного преобразовател , включаюп1,его в себ посторонний источник энергии. В тайих расходомерах в качестве чувствительных элементов используютс термочувствительные элементы , применение которых ограничено высокотемпературными средами.Flowmeters 1J are known based on the dependence on the speed of the measured thermal flux of the receiving transducer, including its external energy source. In tayih flowmeters, temperature-sensitive elements are used as sensitive elements, the use of which is limited to high-temperature environments.

Целью изобретени вл етс возможность измерени высокотемпературных сред при повышении чувствительности.измерени .The aim of the invention is the ability to measure high-temperature media with increasing sensitivity.

Это достигаетс тем, что предлагаемый преобразователь расхода снабжен замкнутым магнитопроводом, измерительный канал выполнен U-образным и размещен в теле замкнутого магнитопровода, нагреватель расположен на участке магнитопровода, охватываюше .м среднюю часть канала,- а измеритрль - на участке магнитопровода, расположенном между входом и выходом измерительного канала.This is achieved by the fact that the proposed flow converter is equipped with a closed magnetic circuit, the measuring channel is U-shaped and placed in the body of a closed magnetic circuit, the heater is located on the magnetic section, encompasses the middle part of the channel, and the measuring section - on the section of magnetic circuit located between the input and output of the measuring channel.

На чертеже представлен обн1ий вид описываемого преобразовател , содержащего замкнутый магнитопровод I с размещенными на нем катушкой 2, питаемой переменным напр жением, и намотанным бифил рно электронагревателем 3. В магнитопроводе имеетс U-образный измерительный канал 4 дл протока жидкости.The drawing shows an exploded view of the described converter containing a closed magnetic circuit I with a coil 2 placed on it, supplied with alternating voltage, and an electric heater 3 wound with a bifillary wound. In the magnetic core there is a U-shaped measuring channel 4 for fluid flow.

Преобразователь может быть помещен в термостат, служащий дл поддержани посто нства температуры окружающего пространства преобразовател расхода.The converter can be placed in a thermostat that serves to maintain the temperature of the surrounding space of the flow converter.

Claims

The flow Converter works as follows: the electric heater 3 maintains the temperature of the magnetic circuit I, equal to the Curie point. In this case, a certain flow rate through the flow channel 4 of the magnetic circuit I corresponds to a certain power of the electric heater,). Since the magnetic core heated by electric heater 3 to a temperature equal to the Curie point loses its ferromagnetic properties and becomes paramagnetic, a change in flow in one direction or another leads to a significant permeability, which causes a change in inductive resistance of the catup ke 2 The .ctora is included in the measuring circuit (na. / 1e1: 4N ". not shown.). The measuring instrument on the 4 generates a 1s signal, which controls the control unit and, consequently, HjVotmiocTbiQ, allocated in the electric generator 3. When the flow rate is reduced, the electric power of the electric motor 3 is invented. , heater and meter, characterized in that, in order to increase sensitivity, it is equipped with a closed magnetic circuit, the measuring unit is U-shaped and placed in the body of a closed magnetic core, the heater is located on chastke magnntoprovoda covering average channel portion and meter - in the magnetic portion located between the inlet and the outlet of the measuring channel. Sources of information taken into account in the examination: I. Kremlin P. P. Flow meters and quantity counters, M., 1975.

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