SU1663447A1 - Gas metering device - Google Patents

Abstract

The invention relates to weighing technology and can be used in the development of dispensers used in the filling of gas in the tank. The purpose of the invention is to expand the gas mass measurement range. The dispenser contains measuring tank 1 immersed in a tank with liquid 2, weighing device 3 connected to measuring tank 1, a system of 4 gas pipelines and gas fittings. In system 4, made of rigid and flexible pipelines, compensating for the reactive effect of the flow on the readings of the weighing device 3, includes tunable device 7. 1 sludge.

Description

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The invention relates to weighing technology and can be used in the development of dispensers used, for example, when filling gas in a tank.

The aim of the invention is to expand the gas mass measurement range.

The drawing shows a diagram of the gas metering device

The gas metering device contains a gas intake container 1. placed in a vessel with liquid 2, a weighing device 3 for weighing the gas intake container with a gas floating in a liquid, system A of gas pipelines, the first valve 5 located on the pipeline supplying gas to the metering device, an additional valve 6 The tunable device 7, which is located on the pipeline that diverts gas from the metering device, ensures equality between the ratio of the mass flow rate of gas through it to the mass flow rate of gas through the discharge pipeline and the volume ratio, measure noy container filled to volume emogo receptacle disposed on the conduit connecting yuschem measuring container with a nodal point of the system between the two rectifiers. An adjustable choke, replaceable calibrated throttle, at least two parallel-connected pipeline branches consisting of a shut-off valve and throttle calibrated under a vessel of a given volume can be used as a customizable device.

The pipeline connected directly to the gas receiving tank can be made in the form of loop-shaped flexible hoses connected in parallel and located symmetrically with respect to the weighing axis of the container 1 or thin-walled tubular springs with the same winding direction, connected and arranged like flexible hoses to allow self-compensation in the process the impact on the weighing device of reactive forces from the gas moving inside them is weighed Your continuous measurement and indication of the current value of the weighed mass, which can be used for electrical measurement of non-electrical quantities, such as strain gauge equipment, conventional lever scales or electronic scales, such as 1799 HTP-3 Dyne weighing complex.

Valves 5, 6 can be equipped with an electric or electromagnetic actuator to provide a remote control or pneumatic actuator.

a controlled electropneumatic foot, located in a non-fire and explosion hazard zone, to ensure fire and explosion safety.

To ensure the automation of the dosing process, a scale with a means for continuously measuring the current value of the weighed mass can be equipped with comparators and power amplifiers that generate signals that control the valves 5, 6, or logic digital elements and power switches that generate signals and control valves 5.6.

The device works as follows.

The adjustable device is installed in the position corresponding to the known volume of the filled vessel. it

the position is determined once by pre-calibrating the dispenser for all possible volumes of different filled vessels. The throughput of the tunable device ensures equality between the ratio of the mass flow rate of gas through it to the mass flow rate of gas through the discharge pipeline and the ratio of the volume of the measuring capacitance to the volume of the filled vessel to ensure the same gas parameters, achieving equality of which is achieved during calibration by measuring their difference pressure with a pressure gauge to zero. The filled container is connected to the metering unit and the valve 5 is opened to equalize the pressure in it and in the measuring containers. The readings of the weighing device are read and the valve 6 is opened. The filling of the filled vessel takes place.

Upon reaching the readings of the weight device, the value determined from the ratio

45

Mk m rm -f MH

where m is the dosed mass of gas, kg;

Mn Μ-reading of the weighing device at the beginning (Mn) and end (Mk) of dosing, kg; V is the volume of the filled vessel, m3;

v - the volume of the measuring capacitance, m3, consistently overlap valves 5 and 6.

Claims (1)

A gas metering device containing a gas receiving tank connected to a supply pipeline with a shut-off valve, a vessel with a liquid and a weighing device, characterized in that, in order to expand the measuring range, into it introduced additional capacity, spaced symmetrically relative to which is less than the volume of the gas intake capacitor, which is an additional tank, an adjustable choke, is additionally added to a vessel with a liquid, suspended from a weighing gate valve, placed on the measuring device and through flexible on the supply pipeline, and two ideas-5 sections of the pipeline are connected to the sub-vertical flexible section of the pipeline connecting the pipeline between the shut-off parallel to each other by events.