SU78634A1 - Gas Pressure Gauge - Google Patents

Description

The subject of the invention is a device for measuring the pressure of gases. Instruments of the same designation using a pressure lock in the form of a closed vessel connected by a liquid manometer to the area of the measured pressure are known.

In the proposed instrument, a distinctive feature is that, in order to increase the range and accuracy of the measured pressures, the pressure fixture in the instrument, filled with atmospheric air before the measurements, is made in the form of a variable reservoir within specified limits of volume composed of individual chambers, connected by a collector with cranes. Consistently turning on the cameras is performed as needed to obtain more accurate readings of the instrument. A liquid pressure gauge in the form of a glass capillary tube with a mercury column placed in it mounted between the retainer and the area of the measured pressure is provided with a graduated scale, the division of which changes in the course of measurements in inverse proportion to the volume of air in the pressure lock chambers.

The drawing shows a device for measuring pressure, a general view.

The device consists of a pressure gauge / connected by the end 2 with the reservoir oiM, in which pressure is measured, and the other end 4 with a closed reservoir 5 of a given volume. Some gauge of mercury (or other podstrachennoy fluid), forming a movable column 6.

The gauge / is provided with a split bar 7. At the ends 5 and 4 of the gauge / there are thickenings 8, designed to prevent the ejection of the movable column 6. For communication with the atmosphere, the reservoir 5 has a tube 3 which is blocked by a valve 9.

The operation of the device is based on the property of gases to change their volume with pressure. At the same time, the difference in volumes of gas at different pressures is recorded by the position of the movable column 6 of mercury moving along the internal channel of the manometer / connected to the tank 5.

To determine the pressure in the tank, a valve 9 is opened, connecting through the tube 3 the internal cavity of the tank 5 with the atmosphere. The pr-selector is tilted so that the end of the 2 gauge / is below the contour, .yrTnllT. So nSr; c S -lbik

NJL horizontal position Cranr a. ™ manometer 1 at ;; risoedin. t to p-rvuar / e r oGGlGo -

Number r ° ogkktorgm GdviGoG - D-enn. to the position at which the pressure / ™ according to the variable pressure urasovosti "pressure ratio is determined on a scale of 7 movable

To measure the best mobile t with a movable mercury column of 6, the yunus 5 tank will separate its number by the number of preheaters of the operating parts (L / L / 7 / / U) connected by several self-sustaining units 10 to cranes //. / 2 and / 5 At the same time, “Efficiency of the collection of pressure (or pressure difference nnl. Р °“ to start the measurement of the device) in the range from 1000 to G .. input. turning on

 The Invention

gin yenish iksair ™ G - -signe squashed with the area of the measurement of a closed container, Р: 0м, about t and ch and n and with that, prg, liquid manometry of measurements the fixer in a poppop, range and tomeasurements at spher1 in the air of a wave within a given range of the volume made up of mГnfJP P connected by a collector with “Inu. separate chambers”:

increase accuracy of readings. ° The necessary columns or other fittings are marked by a sub-meter, which is filled with a cordless tube that is in the process of change. change in the price of volume divisions including innGa kaGr zeruGra increase.