SU1352225A1 - Liquid micrometering device - Google Patents

Abstract

The invention relates to a measuring technique and allows to provide a continuous dosing mode. In the device, a sealed container 1 with pipes 7 and 8 is connected to a filling tank 6 having fittings 11, 13 with shut-off valves 12, 14. Microdosing dosing fluid 2 the capillary pipeline is reached by the constant pressure of the gas coming from the source 4 through the pipeline 3. The tank 1 is refueled through the stop valves 9 and 10 until the level of the liquid 2 in tanks 1 and 6 is equalized without stopping ovki. 1 il. WITH SL GCHE to IsD SL

Description

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The invention relates to instrumentation and can be used in the microdosing of liquids in laboratory practice or in various kinds of technological processes.

The purpose of the invention is to provide a continuous dosing regimen.

The drawing shows a microdispenser fluid.

The liquid microdispender contains an airtight container 1 with a metered liquid 2. A pipeline 3 is connected to the upper part of the airtight container 1 from the gas source 4. The dosage is carried out through the drain capillary pipe 5, which has a large hydraulic resistance. For refueling, a sealed refueling tank 6 is designed, which is connected to tank 1 by two pipes 7 and 8, each of which has one shut-off valve 9 and 10, respectively. Pipeline 7 connects the tops of the containers 1 and 6, and pipe 8 to the lower parts of the containers 1 and 6. To fill the filling tank 6 with metered liquid

2, a nozzle 11 with a stop valve 12 is provided, and a nozzle 13 with a stop valve 14 is provided for bleeding the gas 30 out of the tank 6 when it is filled.

During normal operation of the microbatcher (i.e., the tank 2 is filled with the donated liquid 2, the shut-off valves 9 and 10 are in the closed position) the gas enters through the pipeline

3 from gas source 4, ensuring a constant pressure. This, achieved by the incoming liquid 2, is discharged through the fitting 13. After filling the container 6, the shut-off valves 12 and 14 are closed. When the extreme low level of the dosed liquid is reached in the tank 1, the shut-off valves 9 and 10 open. In a closed volume formed by two connected pipelines with hermetic containers 1 and 6, the fluid levels in both tanks are elevated, as the liquid from the refueling tank 6 flows through conduit 15 to conduit 8 into reservoir 1. At the same time, gas is pumped from reservoir 1 to reservoir 6 through conduit 7, and the pressure in the gas cushion above the liquid to be dosed remains unchanged.

After the levels of the metered liquid 2 are equalized in the containers 1 and 6, the shut-off valves 9 and 10 are closed. Then the cycle repeats.

This device allows a continuous dosing regimen by refilling the hermetic tank 1 without discontinuing the dosage.

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Claims (2)

Invention Formula A microdispenser of a liquid containing a hermetic container with a metered liquid and a drain capillary pipe, a source of constant pressure gas associated with the upper part of the container, characterized in that, in order to provide Constant microdosing through Q continuous dosing modes, c. 5.The capillary drain pipe has a tight filling introduced to fill the filling container 6 into the container with at least one valves 12 and 14 are opened. With a stopper-fitting with a shut-off valve, reagents are supplied through a fitting 11 with a capacitor-11, which is the upper and lower parts bone 6 is filled with dosing fluid 2. Gas from tank 6, squeezed-out with shut-off valves. Editor M. Petrov Compiled by N. Nemtseva Tehred A. Kravchuk Order 5552/35 Circulation 694 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 0 0 0 The supply liquid 2 is discharged through fitting 13. After filling the container 6, the shut-off valves 12 and 14 are closed. When the extreme low level of the dosed liquid is reached in the tank 1, the shut-off valves 9 and 10 open. In a closed volume formed by two connected pipelines with hermetic containers 1 and 6, the fluid levels in both tanks are elevated, as the liquid from the refueling tank 6 flows through the pipe 5 to the wire 8 into the tank 1. The gas is then injected from the tank 1 to the tank 6 via the pipe 7, and the pressure in the gas cushion above the liquid being metered remains constant. After the levels of the metered liquid 2 are equalized in the containers 1 and 6, the shut-off valves 9 and 10 are closed. Then the cycle repeats. This device allows a continuous dosing regimen by refilling the hermetic tank 1 without discontinuing the dosage. five Invention Formula A microdispenser of a liquid containing a hermetic container with a dispensed liquid and a drain capillary pipe, a source of constant pressure gas connected to the upper part of the container, which distinguishes the Corrector O. Kravtsova