SU654910A1

SU654910A1 - Flow velocity meter

Info

Publication number: SU654910A1
Application number: SU772511938A
Authority: SU
Inventors: Владимир Иванович Лаптев
Original assignee: Гусевский Филиал Государственного Научно-Исследовательского Института Стекла
Priority date: 1977-07-26
Filing date: 1977-07-26
Publication date: 1979-03-30

Description

ским давлением, равным напору жидкости и поверхностному нат жению пузырька, и динамическим давлением, завис щим от скорости потока. Когда сопло трубки направлено против потока, эти давлени складываютс , а по потоку - вычитаютс .pressure equal to the pressure of the liquid and the surface tension of the bubble, and the dynamic pressure depending on the flow velocity. When the nozzle of the tube is directed upstream, these pressures add up, and downstream they are subtracted.

При направлении сопла против потока кулачок нажимает на пневмопереключатель 5 (подаетс газ из трубки в полость о) дифманометра 6, а при направлении сопла по потоку кулачок нал имает на ппевмоперсключатель 4 (подаетс газ в полость б) дифманометра 6. Таким образом, в полост х дифманометра поочередно запоминаетс давление газа, соответствующее полному давлению жидкости, оказываемому на пузырек газа при направлении сопла трубки против и по потоку, а вторичным прибором 7 измер етс разность давлений в полост х дифманометра, пропорциональна скорости потока жидкости.When the nozzle is directed against the flow, the cam presses the pneumatic switch 5 (gas is fed from the tube into the cavity o) of the differential pressure gauge 6, and when the nozzle is directed along the flow, the cam flows onto the pneumatic switch 4 (the gas is fed into the cavity b) of the differential pressure gauge 6. Thus, into the cavities the pressure gauge alternately remembers the gas pressure corresponding to the total fluid pressure exerted on the gas bubble when the tube nozzle is directed and downstream, and the secondary instrument 7 measures the pressure difference in the differential pressure gauge proportional to and fluid flow rates.

Claims

Invention Formula

A device for measuring the flow rate, containing a receiving tube, one end of which is fixed in a movable rack and connected to the drive and the other to the receiving opening, is installed along the diameter of the pipeline, a differential pressure gauge, pneumatic links connecting it to the tube, and a measuring circuit different in order to increase the accuracy and reliability of the measurements, it is equipped with pneumatic switches interlocked with a drive, the actuators of which are installed in pneumatic links.

Sources of information taken into account in the examination 1. US patent number 3638490, cl. 73-212, 1972.

2. For the number 2340130 / 18-10, cl. G 01 P 5/14, 03/23/76, on which the decision to issue an author's certificate was made.