SU456144A1 - Automatic dispenser - Google Patents

Description

(54) AUTOMATIC DISPENSER

one

The invention relates to a dosing technique and can be used for mass preparation of various solutions and mixtures of a given concentration, for example, digestion mixtures, when conducting sugar beet sugar analysis.

An automatic metering unit, a sorser unit, a weight measuring unit, a feeder and a dosing control system are known.

The known dispenser does not provide the necessary dosing accuracy.

The proposed automatic metering device provides high metering accuracy due to the fact that one of the arms of the balance arm is equipped with a suspension with a set of interchangeable weights and a shutter of a photoelectric balance recorder connected to the control circuit of the valve, and the other arm of the rocker arm is electrically electrically compensated. with the rheostat, the control unit for recording the dose level in the feeder, and also because the feeder is equipped with a valve of maximum

filling and replaceable initial containers,

The drawing schematically shows the npef l omey dispenser.

Claims (1)

The automatic metering unit consists of a weighing unit that includes a crossbar 1 suspension 2, an electromagnetic weighing computer 3, an equilibrium photosensor consisting of a light source 4, a curtain 5, a shutter 6 and a photoresistance 7, a command button 8 and a set of balanced weights 9; a metering unit consisting of an actuating rheostat 1O with a current collector motor 11, a level registrar carriage 12 & n, a reversing electric motor 13, a metering cylinder 14 with a float 15 and a maximum filling valve 16, a replaceable tank 17, a drainage tube 18, an electromagnetic inlet 19 and exhaust 20, power supply pipe 21 and drain 22, limit switches 23 and 24, light source 25, auxiliary 26 and photoresistance 27, stabilized adjustable power supply unit 28, and control unit 29, in the initial position valve 1 is open. The system of tanks 14 and 17 is filled with a liquid, the float 15 presses the valve 16 for maximum inhaling, preventing the spontaneous outflow of liquid through the drain tube IS. The carriage 12 of the level recorder is in its highest position. After applying the load on the suspension 2, the yoke 1 goes out of equilibrium by opening the shutter 6 to access the light from source 4 through the diaphragm to photoresistance 7. 11. At the same time, the stabilized voltage is removed from the unit 28 to the compensator 3 from the rheostat 10. As the carriage moves, the removed voltage increases, due to which the compensator core is pulled into the coil and sets the balance to Vesi. When the latter is reached, the access of light to the photoresistance 7 is stopped, and the electrical signal arising in this case cuts off the power to the electric motor 13 by means of the control unit 29. The path traveled by the carriage 12 is always proportional to the weight of the weight imposed on the scales. When the button 8 is pressed, the valve 19 closes and the valve 20 opens and the dose is drained. The diameter of the discharge port 22 is chosen so that the dose draining rate is slightly less than the speed of the carriage 12. After the carriage 12 stops, the float 15 descends together with the upper liquid level and blocks the light from the source 25 to the photoresistance 27, the resulting electrical signal closes the valve 20 , opens the valve 19 and turns on the reverse of the electric motor 13. At the same time, the supply pipe 21 is refilled with liquid from the supply tank. the dispenser installed above. At the same time, the carriage 12 and the current collector 11 are returned to the initial position, at the moment of reaching which the contact (24) is opened. Thus, the dispenser is again in the initial position, prepared for the next dosing. Drain tube 18 provides communication with the atmosphere of cylinder 14 and discharge of fluid in the event of valve 16 not working. Limit switches 23 and 24 prevent the exhaust valve 20 from opening in cases where the weight of the hinge is outside the specified weighing range, which eliminates the possibility of erroneous dosage. A change in the dosing rate is made by changing the tank 17 and the balanon load 9, and the proportionality of the dosing is established by selecting the Hanps power supply for the executive rheostat 10 and the compensator 3 on the stabilized power supply unit 28. Claim 1, An automatic metering device containing a weight measuring unit, a feeder and a dosing control system, is required so that, in order to improve metering accuracy, one of the arms is fixed to the romysl with a set of interchangeable weights and an obturator of the equilibrium photoelectric recorder included in the control circuit of the valve, and an electromagnetic weight compensator mounted on the other arm of the rocker arm, electrically connected to the rheostat, the control device for recording the dose level in the feeder 2, dispenser pop 1, characterized in that the feeder is provided with a valve maximum filling and interchangeable of initial capacitances.