SU690344A1 - Absolute pressure gauge - Google Patents

Description

(54) AVSHUTNSGO JAVLSH. MANOMETER:

- ::;,. ;; /;:;.; ., ... i ::. .;, l: -; l ...

Jao6rvT & jie fcacaetc krntroln (-i; Аб в нут Л Л р в в в в в в в в в в в, аб, Извест Извест Извест Извест Извест; fluid pressure gauge, zapvvn-: iymi working fluid C;

HejioetaTKOM of this device is with a small range of measurements at the definition of “G Deelenny Daeletion & emkyutom sszhude; Y: The most suitable method for a proposal is mano: the absolute pressure, containing 1 two vessels connected by the device, to measure the pressure drop of the vessel installed in one of the vessels for force / volume change gas a This is the main pressure of this pressure gauge, the absolute pressure of which is the pressure x: th, the first way of determining the initial pressure in a closed vessel. The value of which can only be set paths

Sravyeni S show me My exemplary prn

boron .- ;;.; ..:,; v ::;. . /. .- ...; Circuit Inventory III - Provision of Motion iMosc oGtiii. absolute measurement of absolute pressure

: This is achieved by the fact that in May of Absolute Pressure there are two main departments of the use of a computer of the shelters of the o The vessels of the drone are connected with a kayal that supplies a safety kit.

Such an embodiment of absolute pressure gauge eliminates the need to adjust the initial pressure value in a closed vessel with noMDuibto exemplary mayOmeter and provide a direct measurement of the pressure of the Leya,; ... ; - - .... ,

FIG. 1 is a schematic diagram of a device for measuring absolute temperature of a gas; in FIG. 2, a variant HcnoJinettHH of the proposed device using a V-shaped differential pressure gauge as a differential pressure meter. The device contains two vessels 1 and 2 with a channel 3 with a shut-off valve 4. The vessel 1 is equipped with a device 5 to forcefully change the volume of gas in it, and the vessel 2 has a channel b with a shut-off valve 7. The device is connected to this channel. tank 8, in which pressure is measured (or co-controlled) or communicated with atmospheric air (when measuring atmospheric pressure). To the lower parts of vessels 1 and 2 there is attached a device 9 for measuring pressure drop, performed, for example, in the form of a diaphragm, bellows, load-power or V-shaped liquid manometer, which is equipped with a measuring scale: Y. Attachment 5 for forced change of the initial gas volume In vessel 1, it was released, for example, in the form of a bellows or piston 11, with a rod 12 and a piston rod 13, with noMOHolifO which fixes an exact change in the volume of gas inside the vessel 1 .. ::. An enclosed tank 8 using the proposed device is performed. as follows:: shut-off valves 4 and 7 are opened. And the internal cavities of the vessels 1, 2 and the device 9 for measuring the pressure drop with gas, which is at fas in a closed vessel 8. Then, valves 4 and 7 are closed, and they change (compress or expand) with the help of tool 5 the initial volume of gas in a vessel by a given (fixed) value D17. . Depending on the magnitude of the absolute pressure P of the gas inside the closed -th reservoir 8, its volume and the parameters of vessels 1 and 2 chosen, the value of the differential pressure generated in them is different. The value of DG on a scale of 10 is registered to the register, the absolute pressure P, the gas in the closed reservoir 8, is judged, because the DG is related to P0 on the basis of the 31st law of Boyle-Ariotta, the following relationship: AP (Uh ± Di. ± AUJ () {Р "U, (d.-u) -io.di, de Uo ,; Uo2; LC; A1 / 2; initial volumes of gas in vessels 1. And 2 and the corresponding changes in these volumes; t &P; pressure difference of gas in vessels 1 and 2, due to the forced change in the volume of the internal cavity of one of them. For large sizes, the closed tank 8, in which the absolute pressure changes (i.e. ,) and with the valve open, 7, which communicates the inner cavity of the vessel 2 with the reservoir, the calculation formula (1) is simplified by the DRSU. ± & ± W2) Di, - UUa The second signs of the members in formulas (1) and (2) correspond to cases of an increase in the gas volume in vessel 1.; DL measurements using the proposed barometric pressure device PQ sanal jointly directly, but with the atmosphere, and the measurement procedure remains unchanged. Measurement of absolute pressure P,, gas in a closed vessel 8 using the proposed CONSTRUCTION, & in which the V differential liquid differential pressure meter 9 is used as a pressure differential; performed as described above. In this case, the forced pressure drop of the pressure agent in the vessel is created: 1 and 2 is estimated by the value of the difference in fluid levels in the knees, the manometer multiplied by the specific gravity values of the working fluid (f) jB according to BOMfb P-yb t-t-bg); where h and hj are the heights of the rise and ejection of the liquid in K (5 V-type manometers.;; Formula of the invention. An absolute pressure gauge containing two vessels connected by a device measuring the pressure drop in the vessels and installed in one of vessels for adjusting the volume of gas in it, of which they are used: in order to

In order to directly measure the absolute pressure, the vessels are additionally connected by a channel equipped with a shut-off valve.

Sources of information taken into account in the examination

1, Zaitsev VN. Instruments for barometric nivepirovanie, M., Teodezizdat, 1956,

2, K.I. Khansuvarov. Precise instruments for measuring absolute pressure. M., Publishing house of standards, 1971

with. 51-52. (prototype).

6 7

eight

690344

four

€ x

-. i-,

year