SU1545086A1 - Apparatus for measuring liquid by volume - Google Patents

Abstract

The invention relates to instrumentation engineering and allows improving the accuracy and reliability of the operation of the dispenser. In the dispenser of the five-membrane element of the comparison 6, the pneumorel 10 is switched after reaching the degree of vacuum in the upper part of the siphon 5, corresponding to the value formed by the pressure setting device 9. Pneumorel 10 switches the normally open 8 and normally closed 7 pneumatic valves, the latter communicating the upper cavity of the measuring tank 1 through the opening 2 with the atmosphere, causing a quick discharge of the dosed liquid. The re-switching time of the pneumorel 10 is adjusted by changing the resistance value 11. 1 sludge.

Description

The invention relates to instrumentation and can be used in the search industry, technical and other industries.

The purpose of the invention is to improve the accuracy and reliability of the dispenser.

The drawing shows a diagram of the dispenser fluid.

The liquid dispenser contains a closed measuring container 1, in the lid of which an opening 2 is made, and its lower part is connected to the inlet pipe 3, equipped with a valve 4 and an inlet siphon elbow, control unit including a five-membrane comparison unit 6, the first minus chamber which is connected to the switching inputs of normally closed 7 and normally open 8 pneumatic valves, its second minus chamber is k pressure setting device 9, and the output to the chamber of the five-membrane power nozzle (comparison element 6 and to the normally open nozzle of Morel 10. Exit ka Measures of a normally open nozzle of the pneumorele 10 are connected via its opening input and output of the chamber of the normally closed supply nozzle of the pneumorel 10 to the control inputs of the pneumatic valves 7 and 8 through a variable resistance 11 closed pneumatic valve 7 is connected to the atmosphere, and the switching input of the normally open pneumatic valve 8 communicates with a hole in the lid of the tank J, in the upper part of the siphon 5 there is a hole 13, with which the output is normal o open pneumatic valve 8.

The operation of the dispenser is as follows.

The dosing fluid from the pipeline 3 flows into the measuring tank 1, gradually filling it and the inlet end of the siphon 5. The air from the measuring tank 1 under the influence of the incoming liquid is released through the normally open valve 8 into the siphon 5. After the measuring tank 1 is completely filled, the liquid level in the siphon 5 reaches the top of the siphon and begins to flow into its output end.

As the metered liquid is siphoned 5 along the line between the opening 2 and the chamber D of the comparison element 6, a vacuum appears, which is created by the weight of the liquid

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The bone located at the outlet end of the siphon 5. When the degree of vacuum reaches a value greater than the predetermined pressure in the chamber. B, the membrane unit of the reference element 6 is thrown to its lowest position, and a signal T is turned on at the exit of the reference element, which will activate the pneumorel 10. A single signal from the pneumorel 10 closes the pneumatic valve 8 and opens a message to the atmosphere of the measuring tank 1 through the opening 2 and the normally closed valve 7. The liquid being metered is discharged at high speed through a siphon 5. After a time variable with resistance 11 and determined during adjustment (it corresponds to the dose draining time), pneumorele 10 is turned off and the circuit returns to its original position.

Claims (1)

The cycle is repeated. The dose is determined by the sum of the volumes of the measuring tank 1 of the liquid in the siphon 5. With a constant volume of the measuring tank, the volume of the liquid in the siphon 5 depends on how much the metered liquid drops down the vertical part of the siphon before dosing, which, in its the queue depends on the value of the maximum vacuum attained in the chamber D of the element 6 of the comparison. The maximum of the vacuum depends on the magnitude of the predetermined pressure in chamber B. Consequently, with the pressure in chamber B, the size of the dose changes. Formula A liquid dispenser containing a closed measuring container, in the lid of which a hole is made, and its lower part communicates with an inlet pipe equipped with a valve and an inlet siphon elbow, characterized in that, in order to increase the accuracy and reliability of operation, a control unit is inserted into it, including normally closed and normally open pneumatic valves, pneumorele pressure setting device, variable resistance and pneumatic capacity, a five-membrane comparison element, the first minus chamber of which is connected to the switching inputs but mal closed and normally open pneumatic valves, minus its second chamber - a pressure setting element, while the output - to the nozzle supply chamber timembrannogo n elemen515450866 This is compared to the normally open closing inlet of the pneumorel, and the nozzle of the pneumorel, the exit of the chamber of the nor-exit of the normally closed pneumatic valve of the nozzle of the pneumorel under-on communicates with the atmosphere, and the commutator is connected through its opening inlet to the input of the normally open pneumatic output of the chamber of the normally closed con-valve communicates with a hole in the cap power supply pneumorelle to control capacity, in the upper part of the siphon there are outlets of pneumatic valves and through a changed hole with which the external resistance and pneumo capacity of the normally open pneumatic valve are connected.