UNIVERSAL DOSAGE SYSTEM OF LIQUIDS ON BASIS OF MEMBRANE PUMP Russian patent published in 2017 - IPC B67C3/20 G01F13/00 

FIELD: engine devices and pumps.

SUBSTANCE: universal dosing system for liquids based on a diaphragm pump, containing a supply container with a fluid to be dosed, connected by a liquid transport line with an inlet nozzle of the above dispensing container, with an outlet pipe at its bottom and with a deaf pneumatic chamber - a gauge of pressure above the liquid level In a dosage container connected to the dispensing control device. The flow tank is designed as an open type tank with constant communication with the atmosphere, the liquid transport line is equipped with a diaphragm pump whose inlet pipeline is submerged under the liquid level in the delivery tank, and the outlet (pressure) pipeline is connected to the inlet branch with a levelling tube of a dosage vessel, Is connected to the pipeline of the discharge line of the dose with an end distribution through a ball valve with a double-sided pneumatic drive with a positive (Z+ - "veins il open") and negative (Z- - "close valve") inputs and drain tip pneumatic supply of the pump input connected to the output relay pressure pneumatically with normally open and normally closed pneumatic contacts. Its normally open pneumatic contact communicates with the atmosphere, and a normally closed pneumatic contact is connected to a compressed air source, and the control unit contains a control panel with a pressure switch with a control gauge and pneumo-tumblers - "Continuous Dosing", "DE Filling", "Regulator" and "Emptying De", A command node containing an electronic timer, an electro-pneumatic transducer with normally open and normally closed air contacts, a three-input "OR" gate and a "NOT" logic element, and a regulator pressure regulator, which is composed of five-membrane element of comparison with two positive and two negative inputs, threshold pressure two-stage amplifier and three relays with normally open and normally closed by pneumatic contacts. Yield electronic timer connected to a control input electric pneumoconverter, normally open pneumocontact which is connected to atmosphere normally closed pneumocontact communicates with the power source Pneumoelements control device, and an output coupled to the first input of the logical "OR" element, a second input connected to the output of the toggle "Continuous dosing", and a third input connected to the output toggle "DE Emptying" and the first relay control channel, the output "OR "element connected to the positive m inlet ball check valve and to the input of NAND gate "NO", the output of which is connected to the negative input of a ball check valve, "Filling DE" toggle output is connected to a normally open pneumatic contact of the second relay, normally closed air contact of which is connected to the output of a two-stage pressure amplifier, and the output is to the control input of a pressure switch with pneumatic control, the output of the "Regulator" toggle switch is connected to the air supply terminal of the second cascade of a two-stage pressure amplifier and to the control channels of the second and third relays whose normally open air contact is connected to the output of the first relay, its normally closed pneumatic contact is muffled, and the output is connected to the pneumatic chamber of the dosing capacity and to the negative inputs of the five-membrane reference element whose positive inputs are connected to the output of the pressure setter, to the pressure gauge and to the normally closed air contact of the first relay, the normally open air contact of which communicates with the atmosphere, and the output of the five-membrane comparison element is connected to the input of a two-stage pressure amplifier.

EFFECT: increasing the accuracy and productivity of the system during the implementation of batch dosing operations, expanding its functionality when operating in continuous dosing mode.

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