SU1647268A1 - Liquid meter - Google Patents

Abstract

The invention relates to the field of volumetric dosing of liquids and allows for improved accuracy. The fluid fills the cylinder 1 when the piston moves down and is squeezed into the vessel 26 during the reverse movement of the piston 3, the piston rod 4 of which is fixed on the driver 5 moving during rotation of the spindle 6 having the actuator 7, which is controlled by the program-driver unit 24. Tip 14 mounted on the free end of the driver 15. There is also located the sensor 16 fixing the initial level of dosing (the location of the bottom of the vessel 26). The lead 15 is moved by the lead screw 17, having a drive 18, which is controlled by the block 25 inputting the displacement coefficient of the drain nozzle 13. The block 25 in accordance with a particular volume of the vessel 26 each time according to a predetermined program ensures fixation of the tip 14 in such a position relative to the bottom of the vessel 26, so that after filling it with a dose of liquid, its surface is at a level at which it comes in contact with a drop of liquid at the end of the tip 14 and the tearing off of this drop. 3 il.

Description

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Claims (1)

Claim A liquid dispenser comprising a cylinder with a piston, the rod of which is connected to a displacement drive connected to a liquid flow indicator, the output of which is connected to the counting input of the pulse counter. the output of which is connected to the first input of the program-mm setting unit, the first output of which is connected to the displacement drive, and a drain pipe connected to. cylinder through a distribution valve, distinguished by the fact that, in order to increase accuracy, a drainage pipe displacement unit, an initial metering level fixation sensor, a discharge pipe displacement indicator, an additional pulse counter and an input unit for the discharge pipe displacement coefficient are introduced into it moreover, the node for moving the drain pipe is made in the form of a lead screw with a drive and a lead connected to the drain pipe, and the pointer for moving the drain pipe is made in the form of a disc-shutter, kinematic eski connected to the spindle of the displacement unit, illuminator and light receiver, while the output of the displacement indicator of the drain pipe is connected to the counting input of the additional counter, the output of the sensor for fixing the initial metering level is connected to the reset inputs of both pulse counters, the output of the additional pulse counter is connected to the first input of the input unit the displacement coefficient of the drain pipe, the second input of which is connected to the second output of the program-setting unit, the second input of which is connected to the first output to the input block of the coefficient of movement of the drain pipe, the second output of which is connected to the drive unit for moving the drain pipe.