Patent EA-008884-B1 (EA)
Title: Fluid consumption measurement system
Inventor: SASIN PAVEL PAVLOVICH
IPC: G01F15/06
Filed: 2005-12-21
Abstract: The invention refers to the devices for the measurement of fluid consumption by means of its transmission in the continuous flow through the measuring devices with the help of rotating paddle impeller together with electromagnetic connection within counter device.Fluid consumption measurement system contains frame 1 sensor with measuring cavity 2, lid 3, inlet 4 and outlet 5 tangentially directed holes, impeller 6, installed in the measuring cavity 2 with rotation ability, counting device 8, connecting element 9 of impeller 6 within counting device 8 and protective cover 10 of external function-transforming area 11.The new feature of this connecting element 9 is that it contains contactless magneto-semiconductive Hall plate 12 with readout signal shaper 13 positioned on the external function-transforming area 11 on the separate circuit board 14,magnet 15, positioned on the impeller 6 with possibility to interact with its magnetic field and contactless magneto-semiconductive Hall plate 12 through air-gap and lid 3 made of nonmagnetic material, and counting device 8 is made in the form of separate block with the possibility of its remote position and readout signal receipt far apart.Magnet 16 is circular and multipolar and positioned from the lid side 3 on the back panel of the impeller 17 hub 6 with hardly fastened rotation axis on it 7 with the possibility to guarantee self-balancing equilibration, and contactless magneto-semiconductive Hall plate 12 is placed on the radial slit 19 executed on the additionally introduced ring-type magnetic conductor 18 within the possibility to increase concentration regarding its magnetic field.Magnetic circuit 18 is positioned on the back panel 20 of the separate circuit plate 14, and former 13 of readout signal that contains differential amplifier – transformer 21 and power amplifier 22, connected between each other and magneto-semiconductive Hall plate 12 with possibility to form reading signal for counting device 8 placed on the large distance, proportionally measured one-time rotation angle of impeller, determined with the help of the following expression: α =360/n, where α- is defined rotation angle of impeller and n - is a number of pole pairs in the ring-type magnetic conductor.Counting device 8 includes counter 23 of volume fluid consumption with indicator 24 of its digital reading, divisible to the measurable one-time volume fluid consumption, generator 25 of digital value necessary for total volume fluid consumption, comparison 26 element, element of 27 adjusting time delay t1 for exact finishing back fitting rest, less to the multiplicity of registration, logical device 28 AND, logical device 29 OR logical devices 30, 31 NOT.Rotation axis 7 of impeller 6 is needle-shaped and equipped with the sliding bushes 32, 36 and axial bearings 33, 34 with the possibility to provide fractional vertical transfer in the axial direction at the moment of impeller 6 breakaway and supply of supporting pair «plate-cone» with the minimum acceptable contact area, resistance and loading.Needle axis 7, of slipping clutch 32, 36 and axial bearings 33, 34 made of wear-resistant substances, and a quick-detachable protective cover 10 with the possibility to provide moisture resistance on the external function-transforming area 11.The above mentioned improvements permit to decrease a resistance and loading on the rotation axis of the impeller, to increase perceptibility, speed of operation and measurement accuracy, to improve service conditions and operation safety device, to increase its working life, to expand functional capabilities and a field of application.The suggested device could find a wide application and use not only in the housing and communal services, food, chemical, oil and other fields of industry, but also in the mechanical engineering at the developing new and technical update of old measuring devices and other similar devices (4-th position., 4 drawing.).