SU696297A1

SU696297A1 - Device for measuring gas low rate -of -flow

Info

Publication number: SU696297A1
Application number: SU752107816A
Authority: SU
Inventors: Петр Григорьевич Тишин
Original assignee: Предприятие П/Я В-2679
Priority date: 1975-02-18
Filing date: 1975-02-18
Publication date: 1979-11-05

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ МАЛЫХ РАСХОДОВ ГАЗА(54) DEVICE FOR MEASURING SMALL GAS CONSUMPTION

Изобретение относитс к приборостроению и. может быть использовано дл измерени .малых расходов газа при проведении лабораторных анализов, например, в газовой хроматографии.The invention relates to instrument making and. can be used to measure small gas flow rates when conducting laboratory tests, for example, in gas chromatography.

Известны расходомеры дл измерени малых расходов газа, представл ющие собой калиброванную стекл нную трубку, соединенную с тройником. Через один конец тройника поступает измер емый поток газа, на другой надета деформируема емкость - резинова груша 1.Flow meters for measuring low gas flow rates are known, being a calibrated glass tube connected to a tee. The measured gas flow enters through one end of the tee, and the other is worn with a deformable capacity — a rubber pear 1.

В этих расходомерах существует утечка измер емого.газа при заполнении деформируемой емкости в процессе работы поверхностно активным веществом, например, мыльным раствором и, кроме того, в них не обеспечиваетс одновременное измерение нескольких газовых потоков.In these flow meters, there is a leak of the measured gas during the filling of a deformable container during operation with a surface active substance, for example, a soap solution, and, moreover, they do not provide simultaneous measurement of several gas streams.

Цель изобретени - расширение области применени .The purpose of the invention is to expand the scope.

Это достигаетс тем, что устройство снабжено не менее одной дополнительной измерительной трубкой со щтуцерами подвода газа и поверхностно активного вещества, щтуцером, установленным на выходе деформируемой емкости и дополнитепьной емкостью с поверхностно активным веществом, в которой размещены щтуцеры подвода поверхностно активного вещества и штуцер деформируемой емкости, причем нижние кромки штуцеров подвода поверхностно активного вещества расположены ниже уровн поверхности поверхностно активного вещества симметрично относительно штуцера , соединенного с деформируемой емкостью, верхн кромка которого расположена выше уровн поверхности поверхностно активного вещества.This is achieved by the fact that the device is equipped with at least one additional measuring tube with gas and surfactant supply connectors, with a transducer installed at the outlet of the deformable container, and an additional capacity with surface active substance, in which the surfactant supply connectors and the nozzle of the deformable capacity are located moreover, the lower edges of the fittings for supplying the surface-active substance are located below the surface level of the surface-active substance symmetrically itelno fitting connected with the deformable container, the upper edge of which is located above the surface level of surfactant.

На чертеже схематически изображено предложенное устройство.The drawing schematically shows the proposed device.

15 Устройство содержит две измерительные трубки 1 с делителем газа и поверхностно активного вещества 2, штуцеры ввода 3 и вывода 4 газовых потоков, штуцеров подвода поверхностно активного вещества 5, емкость 6, выполненную из прозрачного материала 15 The device contains two measuring tubes 1 with a gas divider and surfactant 2, fittings input 3 and output 4 gas flows, fittings supply surfactant 5, capacity 6, made of a transparent material

Claims

20 and filled with a soap solution and a deformable container 7 connected through a brush 8 with a container b, with the upper edge of the brush 8 located above the surface level of the surface active substance. The device works as follows. When pressing on the deformable container 7, the air discharged through igguzer 8 evenly acts on the surface of the surfactant in the container 6, thereby ensuring a simultaneous supply of this substance to the inlet portions of several measuring tubes through the fittings of the surfactant supply, the lower edges of which are below the surface surfactants in the tank 6 and are located symmetrically with respect to the fitting 8. Films of the surfactant substance are carried along by the flow gas flow and move through the measuring tubes. The time during which the film passes the interval between two marks on the measuring tube is fixed with a stopwatch, after which the amount of gas passing through each measuring tube per unit of time is calculated. The presence of an additional tank with a surfactant solution connected to the deformable tank through a junction, the upper end of which is located above the surface level of the surfactant, and the location of the lower edges of the nozzles of the surface active substance below the surface of this substance allows Work the device without leakage of the measured gas through the lower end of the measured tube. Apparatus of the Invention A device for measuring low gas flow rates, comprising a measuring tube with a gas supply nozzle and a surfactant supply syringe and a deformable capacitance, characterized in that, in order to expand the range of use, it is equipped with at least one additional measuring tube with gas supply fittings and a surfactant, a choke installed at the outlet of a deformable container and an extra tank with a surfactant in which the fittings are placed supplying a surfactant and a fitting of a deformable container, the lower edges of fittings supplying a surfactant located below the surface of the surfactant substance symmetrically with respect to a fitting connected to the deforming capacity, the upper edge of which is located above the surface of the surface-active substance. Sources of information taken into account during the examination 1. B. Frenkel. Measurement of small and micro expenditures of petrochemical products. M. 1973, p. 102-104.