SU1770761A1 - Liquid volume determining method - Google Patents

Description

The invention relates to a method for determining the volume of containers, tanks, tanks and other pressurized volumes, and can also be used in particular for determining the log volumes of pressurized residential premises.

A device for determining the volume of capacity, protected A. with. No. 33313, cl. 42 e, 29. The volume of the tank using this device is determined when filling it or when taking from it a known amount of gas, bringing the pressure in the tank to a certain value.

The disadvantages of this method are the low accuracy of the measurement, the complexity of the device itself due to the presence of moving parts.

The prototype of the claimed method for determining the volume of capacity is a technical solution protected A. with. No. 152078 cells G 01 F 17/00, which consists in transferring gas from a calibrated container, where it was under pressure, into the test container and after establishing equilibria. pressure in them mathematically calculate the volume of the tested capacity.

The disadvantage of this method is the 'small accuracy associated with the error! the pressure measurement in the calibrated tank before work, and ί the long time necessary to establish the pressure in the test tank | bones, which, due to some leaks in the system, part of the air can go. ₍

The aim of the invention is to increase the accuracy of volume measurement. I

This goal is achieved by the fact that before. additionally, after sealing the container and creating excess pressure in it by displacing gas from the intermediate tank by filling the intermediate tank with liquid from the vessel, the vessel is sealed before the liquid flows from it. Then, according to the measured at

1770761 A1 to the atmospheric pressure, the overpressure in the measured tank and the volume of gas displaced to the last, determine the tank’s volume.

The implementation of the method for determining the volume of capacity is carried out according to the scheme shown in the drawing.

The tank 1 by a pipe 4 is connected to an intermediate tank 2, which in turn is connected by a pipeline 5 to a vessel 3. The vessel 3 is equipped with pipes 6 and 7 with valves. A differential pressure gauge 8 is connected to the tank 1. A differential pressure gauge 9 is connected to the vessel 3.

The invention is as follows. With open valves in pipelines 6 and 7, a closed valve in pipeline 5. through pipeline 6, vessel 3 is completely filled with water. Moreover, the volume of the vessel 3 should be slightly larger than the volume of the intermediate container 2. After some time, when the water in the vessel 3 is degassed, you can proceed directly to work. The valve opens in the pipeline 5 and the water from the vessel 3 passes into the intermediate tank 2. As soon as it is completely filled with water. what can be judged by the appearance of a liquid column in zone “A (see Fig.), and the lower edge of zone A is located slightly above the upper level in the intermediate tank 2. the pipeline valve 7 connected to the atmosphere is closed (valve 6 is in the closed position after filling the vessel 3 with water). After that, the level of the liquid column in zone “A” rises somewhat and stops. In the upper part of the vessel 3 filled with gas, there will be a vacuum, indicated by a differential pressure gauge 9. Due to the discharge in the upper part of the vessel 3, errors in determining the volume of the tank 1 are reduced, because gas bubbles in the liquid being filled in the intermediate tank 2 and the pipelines are “drawn off” by vacuum.

After stabilization of the liquid levels in the system, the following are measured:

1) atmospheric pressure - P;

2) the pressure in the measuring tank 1 - P _e :

3) the volume of displaced gas - V _K ;

The desired capacity is determined by the formula:

where Vk is the volume of the intermediate tank together with pipelines filled with water.

The proposed method for determining the volume of the tank will allow to achieve high measurement accuracy without the use of high pressure and large intermediate tanks. Moreover, given that the process of filling the intermediate tank with water occurs quickly, and the excess pressure in the tank is negligible, the error associated with the leakage of the system during measurement will be practically absent. In addition, the occurrence of leakage can be controlled by a change in the distance ah or by a difference in levels in the differential pressure gauge.

9.

The expected annual economic effect from the implementation of the invention will be 0.7 thousand rubles per vessel.

Claims (1)

Claim A method for determining the volume of a container, which consists in sealing the container, creating excess pressure therein by displacing gas from the intermediate container from the vessel in communication with the intermediate container and determining the desired volume from the measured atmospheric pressure, the overpressure in the measuring container and the volume of gas displaced to the latter, characterized in that, in order to improve the accuracy of measurements, the upper part of the vessel is sealed before the end of the displacement into a measured volume of gas of a predetermined volume, and measurements are made DYT after stabilization fluid levels in a vessel and the intermediate vessel. Compiled by G. Soloviev Editor Tehred M. Morgenthal Corrector N. Buchok Order 3733 Circulation Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant “Patent, Uzhgorod, Gagarin St. 101