Patent EA-008732-B1 (EA)
Title: Automatic fluid dosing device
Inventor: SASIN PAVEL PAVLOVICH
IPC: G01F11/00
Filed: 2006-02-21
Abstract: The invention could find a wide application and use in food, chemical, oil and other fields of industry, as well as in the instrument-making and engineering industry, developing new and technical update of old dosing devices and other similar systems.Automatic fluid dosing device contains a sealing electro valve, electro valve control unit, counting device of current fluid consumption, generator of total necessary fluid consumption, readout waveform shaper and fluid consumption measuring device, installed on the pipeline, in series with shutoff electro valve, consisted of sensor frame with measuring cavity, lid, inlet and outlet, tangentially directed holes, impeller, installed in the measuring cavity, and a connecting element of impeller and readout waveform shaper.The new feature is that connecting element is executed in the form of magneto-sensible semi-conductive Hall plate, placed on the closed protective cover of the external function-transforming area on the separate circuit plate, fixed on the lid clamp nut, and a magnet, placed on the impeller with possibility to interact with its magnetic field with magneto-sensitive semi-conductive Hall plate through air-gap and a lid made of diamagnetic material, where magnet is made in the form of circular multipole device and installed from the lid part on the back panel of the impeller hub with hardly fastened rotation axis on it, with the possibility to provide rotation lightening and self-balancing equilibration, and magneto-sensitive semi-conductive Hall plate is placed on the radial slit executed on the additionally introduced ring-type magnetic conductor within the possibility to increase concentration, regarding its magnetic field and this magnetic conductor is coaxially placed with the circular multipole magnet and fastened on the back part of the abovementioned circuit plate; readout signal shaper is placed on the face side of the circuit plate and contains differential transducer amplifier with inlet, connected with outlet of magneto-sensitive semi-conductive Hall plate, and a power amplifier with the inlet connected with the differential transducer amplifier outlet, and inlet connected with the appropriate inlet of a counting device with the possibility to establish necessary and sufficient readout signal, independently from the distance, corresponding to the single measuring volume fluid consumption and proportionate to the rotation angle of the impeller, defined by expression: α = 360/n, where α – is a defined rotation angle of impeller and n - is a number of pole pairs on the ring-type magnetic conductor; counting device includes: counter of volume fluid consumption with digital indicator and registration data equal to the measurable single volume fluid consumption, comparison element of meter reading and generator value, adjusting time delay element t1 for exact finishing back fitting rest, less to the multiplicity of registration, logical device AND, logical device OR two logical devices NOT; and control unit includes a logical element AND, logical element OR, logical element OR-NOT (1 -dependent point of the patent claim, 4 illustrations).