SU1620849A1 - Gas metering device - Google Patents

Abstract

This invention relates to gas metering devices and provides improved accuracy and reliability. From the source 10, the gas mixture through the electromagnetic valve 8 enters one of the cavities of chamber 1 and moves the separation fluid 2, which forces the gas mixture through the open electromagnetic valve 11 from the other cavity communicated with the first through the bottom of the partition 3, a bevel, the angle of which lies in the plane of the partition and is 90 - arctg 7-. xf 90, where h is the minimum b level of separation fluid in the cavities; b - the width of the partition. When the separation fluid 2 is raised to the upper level, the level sensor 5 is triggered and the control unit 7 gives a command to switch the solenoid valves (the valves 8, 9 are closed and the valves 9, 12 are opened). To eliminate the error of the gas metering unit, the partition 3, installed with the possibility of vertical movement, is adjusted in height in the cracker 4. Under the condition that the separating fluid 2 moves above the permissible level, the gas mixture passes through the point hydraulic shutter formed between the chamber 1 and the bevel of the partition 3. 2 silt with SS (L o to about 00 Ј CO

Description

The invention relates to a measurement technique and can be used to meter small volumes of gases.

The aim of the invention is to improve the accuracy and reliability of dosing.

FIG. 1 schematically shows a gas metering device; in fig. 2 - partition.

The gas dispenser contains a chamber 1, partially filled with a separating liquid 2 and divided by a partition 3 into two communicated with each other in the lower part of the cavity. The partition 3 is mounted with the possibility of vertical movement in the cracker 4. In the upper parts of the cavities of the chamber 1 there are placed level sensors 5 and 6 connected to the control unit 7, inlet pipes

Blend 14. In this case, the control unit 7 ensures that the electromagnetic valves 9 and 12 are closed. When the separation fluid 2 is raised to the upper level, the level sensor 5 is triggered and the control unit 7 commands the inversion switching of the electromagnetic

valves 8, 9, 11, 12, of which

the electromagnetic valves 8, 11 are closed, and the electromagnetic valves 9, 12 are opened.

After the level sensor 6 is triggered, the cycle is repeated.

To eliminate the error due to dynamic pressure changes in the source 10 and the gas mixture receiver 14, and to exclude

gas mixture reported through COOT-- 2Q of the release of separation fluid

electromagnetic valves 8 and 9 with a source 10 and gas outlet nozzles connected via corresponding electromagnetic valves 11, 12 and line 13 to a gas mixture receiver 14, for example, with a gas analyzer. Electromagnetic fans 8, 9 and 11, 12 are connected to the control unit 7. The lower part of the partition 3, through which the cavities are communicated, is made with a bevel, the angle of which lives in the plane of the partition and constitutes

35

90 ° - arctg Ј tf 90

h is the minimum allowable level of separation fluid in the cavity x;

b - the width of the partition. The gas metering device operates as follows.

Claims (1)

From the source 10, the gas mixture with a constant pressure, by command from the control unit 7, for example, through the electromagnetic valve 8 enters one of the cavities of the chamber 1 and moves the separation fluid 2, which forces the gas mixture out of the other cavity through the open electromagnetic valve 11 to the receiver gas 2 in line 13 is used to adjust the height of the partition 3 in the rusk 4. Under the condition of the inertial movement of the separation fluid above the permissible level, the gas mixture passes through the point of hydraulic Thief formed between the camera 1 and the chamfer 15 partitions 3. Formula invention A gas dispenser containing two interconnected in the lower part of the cavity with a propellant in the form of a separating liquid and gas inlet and outlet nozzles, a gas supply and exhaust control unit, characterized in that, in order to increase accuracy and reliability, an installed with the possibility of vertical movement of the partition, through the lower part of which, made with a bevel, cavities are communicated, and the bevel angle lies in the plane of the partition and constitutes 90 ° - arctg Ј 90, D where h is the minimum allowable level of separation fluid in the cavity x; b - the width of the partition. FIG. 2