EP2694925A1 - Velocity type flow meter with electronic readout - Google Patents
Velocity type flow meter with electronic readoutInfo
- Publication number
- EP2694925A1 EP2694925A1 EP12720691.0A EP12720691A EP2694925A1 EP 2694925 A1 EP2694925 A1 EP 2694925A1 EP 12720691 A EP12720691 A EP 12720691A EP 2694925 A1 EP2694925 A1 EP 2694925A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- hub
- flow meter
- revolutions
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/06—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission
- G01F1/075—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission with magnetic or electromagnetic coupling to the indicating device
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
- G01F15/063—Indicating or recording devices for remote indication using electrical means
Definitions
- the object of the invention is a velocity-type flow meter with electronic readout used for measurement of volumetric flow of a fluid, and in particular, of water, installed on a pipeline.
- a water meter is a device for application particularly on water pipes in cold and hot water supply systems.
- flow meters and in particular velocity type flow meters, are the devices with a counting system coupled with an impeller in the form of a paddle wheel.
- an impeller of a paddle wheel nature mounted on a single axle or on two axles, on the axis perpendicular to the direction of liquid flow. Fluid flows through the impeller chamber in the direction perpendicular to the axis of ; rotation of the impeller, causing its rotation that is proportional to flow rate.
- the number of revolutions of the impeller depends on the volumetric flow rate of the liquid.
- the known flow meter is usually equipped with a non-contact sensor of the number of revolutions. A signal from the sensor, after its transformation, is used for calculations as an impulse signal. The number of impulses is proportional to the value of fluid flow inside the pipe.
- Flow meters are equipped with electronic flow indicators, so they include an electronic syste that counts the impulses induced by a signal transmitter, normally located on the axle of the flow meter impeller, for example by a magnetic element in cooperation with the Hall sensor.
- Impulses are counted and multiplied by the amount of flowing fluid, determined on the measuring station for a given type of a water counter. The result is presented on the display in the form of volume of the fluid that flew through the water meter body in a specific period of time.
- the stream of liquid flowing through the impeller chamber directed by way of location of the liquid inlet and outlet pipe nozzles to/from the impeller chamber to one of the sides of the chamber, activates the rotation of the impeller with a rotational speed proportional to the volumetric flow rate of the liquid.
- Revolutions of the impeller in the unit of time are counted and transformed in a mechanical or electronic system in the counting part of the water meter.
- electronic water meters one applies, first of all, the readout of magnetic impulses coming from a permanent magnet or magnets, fastened to the impeller and read by a stationary magnetic sensor, attached to the water meter housing.
- the solution of this kind results in susceptibility of the water meter to the external interference with a magnetic field.
- the basic problem is the accuracy of indications, along with the changes in liquid flow rate.
- a special problem consists in maintaining of the accuracy of measurement in the lowest values of flow, in the neighborhood and below the minimal flow of the flow meter.
- the impeller operates in an unstable way and it may even stop; it does not indicate the values of liquid flow then. It causes substantial errors in indications in these areas of operation of the flow meter.
- the purpose of the invention is to decrease the value of minimal flow Qi of the flow meter and the value of its start-up threshold.
- the flow meter with electronic readout is composed of a body with an impeller chamber, along with a water inlet and outlet pipe nozzles, and the impeller chamber is closed with an upper cover, and in this impeller chamber there is an impeller installed on the axle that is perpendicular to the liquid flow direction.
- an impeller installed on the axle that is perpendicular to the liquid flow direction.
- To a hub of the impeller one fastened the elements that dampen vibrations of an electromagnetic circuit.
- a receiver of indicator signals connected with a counter and including a display of measurement values and optionally, a transmitter with an antenna.
- the receiver of signals of revolutions of the impeller forms the RLC electronic system, emitting a constant stream of electric impulses, aimed in the direction of the line of revolutions of the dampening element.
- the notion of the line of revolutions of the dampening element is defined as a circle, on whose path the dampening element moves; this element is fastened on the hub of the impeller.
- the dampening element installed on the plane of the hub of the impeller rotates around the axis of rotation of the impeller.
- the dampening element moves along the line of the circle, whose radius determines the distance from the axis of symmetry of the impeller to the points of fastening of the dampening element on the plane of the hub of the impeller, perpendicular to the axis of rotation.
- the indicator of revolutions of the impeller may be a pair of dampening elements attached on one side of the impeller, on the plane of the hub of the impeller, perpendicular to the axis of rotation.
- both dampening elements are distributed symmetrically to one another, on a theoretical line of diameter of this hub of the impeller.
- both pairs of the dampening elements The purpose of such a location of both pairs of the dampening elements is to obtain uniformity of distribution of mass of the impeller in the flowing liquid, along with the other components of the impeller, such as sleeves, a thrust bearing and the dampening elements, both in the plane that is perpendicular to the axle of the impeller going through the center of the impeller, and in the plane that is parallel to the axle of the impeller going through the center of the impeller.
- the weight of the complete impeller favorably corresponds to the weight of fluid displaced by this impeller.
- the center of buoyancy of the impeller coincides with its center of gravity.
- FIG. 6 section of the water meter in the second example
- Fig. 7 top view of the impeller in the second example
- Fig. 14 view of the impeller in the fourth example.
- the water meter with electronic readout is composed of the body .1 with the impeller chamber, along with water inlet connector pipe 2 and outlet connector pipe 3.
- fig. 3, fig. 6, fig. 9 it was presented that the impeller chamber is closed with the upper closing plate 4 and that there is the impeller 5 in the impeller chamber, located on the axle 51, 52, 53, perpendicular to the direction of water flow.
- a dampening element 71 To the hub 6 of the impeller 5 one attached a dampening element 71.
- the electronic system composed of the electronic board 11, the display 9, the battery 15 and the antenna 10, located in the dry chamber 8 and the coil 14 located in the plate that closes the water meter 4, detects motion of the dampening elements 71,72 on the line of revolutions.
- the dampening elements 71,72 move along the line of the circle, whose radius determines the distance from the axis of symmetry of the impeller 5 to the point of fastening of the dampening elements 71,72 on the plane 12 of the hub 6 of the impeller 5, perpendicular to the axis of rotation.
- the dampening elements 71,72 constituting the indicator of revolutions of the impeller 5 form a pair of elements fastened on one side of the hub of the impeller, on the plane 12 of the hub 6 of the impeller 5, perpendicular to the axis of rotation.
- both dampening elements 71,72 are distributed symmetrically to one another, on a theoretical line of diameter of this hub 6 of the impeller 5. It was shown in the attached fig. 4, fig. 7 and fig. 10.
- In this example of solution on the other side of the hub 6 of the impeller 5, on the plane 13 one fastened the opposite second pair of the elements 73, with the same mass as the pair of elements that constitute the indicators 71,72.
- This second pair of balancing elements 73 is also fastened symmetrically on the line of diameter of the second plane 13 of the hub 6 of the impeller 5.
- the weight of the impeller along with the components of the impeller, such as sleeves, a thrust bearing and dampening elements 71,72 and with the balancing elements 73 on the other side of the hub 6 of the impeller 5, is equal to the weight of fluid displaced by this complete impeller.
- the impeller 5 includes two dampening elements 71,72, two balancing elements 73, two slide bearings 55, inside of which there are located two axle shafts 51 that are not the parts of the impeller 5 and are separated with at least one sapphire stone 54.
- the impeller 5 has the axle shaft 52 on one side, and the sleeve 55 on the other side, inside of which there is the second axle shaft 51, which is not a part of the impeller 5.
- This axle 51 is located in the body of the water meter 1 and it is supported on the thrust bearing, i.e. the sapphire stone 54 located in the impeller 5.
- the impeller includes two dampening elements 71,72.
- a balancing ring 74 In this example of construction, in the impeller 5 from the side of the sleeve 55 there is a balancing ring 74. In other examples of construction one does not exclude the use of a different number of dampening elements 71,72 and of balancing elements 74.
- the impeller 5 includes two dampening elements 71,72, two balancing elements 73, and two axle shafts 53, forming a part of the impeller 5.
- the axle shafts 53 are situated in the openings in the body 5 and in the upper cover 4 of the chamber of the impeller 5.
- one does not exclude the use of a different number of dampening elements 71,72 and of balancing elements 73.
- the impeller 5 in a view conforming to the axis of rotation of this impeller.
- the dampening elements 71,72 were shown in detail in the figure 13.
- the elements 71,72 are made from chromium steel H17.
- the whole impeller, along with the hub 6 and the blades, is made from polypropylene.
- the complete impeller includes the dampening elements 71,72 on the plane 12 and the balancing elements 73 on the opposite plane 13 of the hub 6.
- the balancing elements 73 are also made from steel H17, of the same shape as the dampening elements 71,72.
- the complete impeller presented in the figure 12, with a diameter ⁇ 44,8 mm has the mass of 3, 69g and the volume of 3,69 cm 3 .
- the complete impeller 5 weights as much, as the water it displaces, and additionally, according to the solution presented in the invention, it is balanced on the axis.
- the measurements made on both sides of the measurement axis of rotation of the impeller 5 yielded the following results: the mass on the left-hand side amounting to l, 845g and the mass on the right-hand side also amounting to l,845g.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL394473A PL224360B1 (en) | 2011-04-07 | 2011-04-07 | Velocity-type flowmeter with electronic reading |
PCT/PL2012/000015 WO2012138239A1 (en) | 2011-04-07 | 2012-03-23 | Velocity type flow meter with electronic readout |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2694925A1 true EP2694925A1 (en) | 2014-02-12 |
Family
ID=46062710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12720691.0A Withdrawn EP2694925A1 (en) | 2011-04-07 | 2012-03-23 | Velocity type flow meter with electronic readout |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2694925A1 (en) |
PL (1) | PL224360B1 (en) |
WO (1) | WO2012138239A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPD20120409A1 (en) * | 2012-12-27 | 2014-06-28 | Dab Pumps Spa | LIQUID FLOW RATE CONTROL EQUIPMENT OF A ELECTRIC PUMP AND THE ELECTRONIC CONTROL TEMPERATURE AND COMMAND OF A PUMPING DEVICE PROVIDING THE ELECTRIC PUMP |
DE202013001852U1 (en) * | 2013-02-27 | 2014-02-28 | Christian Gradischnik | Device for detecting a flow |
DE102014226444A1 (en) * | 2014-12-18 | 2016-06-23 | BSH Hausgeräte GmbH | Rotor assembly, flow meter, rotor and water-conducting household appliance |
IT201900005882A1 (en) * | 2019-04-16 | 2020-10-16 | B Meters S R L | COUNTER FOR FLUIDS. |
EP3754305A1 (en) | 2019-06-17 | 2020-12-23 | Apator Metrix Spolka Akcyjna | Flow meter |
IT201900012870A1 (en) * | 2019-07-25 | 2021-01-25 | Dab Pumps Spa | PERFECTED DEVICE FOR CHECKING THE FLOW OF LIQUID AND THE TEMPERATURE OF THE CONTROL AND COMMAND ELECTRONICS OF AN ELECTRIC PUMP |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5694219A (en) | 1979-12-28 | 1981-07-30 | Ricoh Co Ltd | Electronic water service meter |
JPS5944569B2 (en) | 1980-01-16 | 1984-10-30 | 株式会社リコー | electronic water meter |
AU2688692A (en) * | 1991-09-23 | 1993-04-27 | Futureflo System, Incorporated | Liquid flow meter |
US6149801A (en) * | 1997-08-08 | 2000-11-21 | Water Pik, Inc,. | Water treatment device with volumetric monitoring features |
JP2003207376A (en) | 2002-01-12 | 2003-07-25 | Masao Miyake | Tap water consumption amount display device |
DE202006005400U1 (en) * | 2006-03-31 | 2006-08-10 | Engelmann Sensor Gmbh | Flow through sensor e.g. for measuring individual heat and water consumption, has capsule having upper section and underneath upper section impeller is provided |
DE202006005401U1 (en) * | 2006-03-31 | 2006-08-10 | Engelmann Sensor Gmbh | Flow through sensor e.g. for measuring individual water and heat consumption, has capsule having impeller which at its top side has modulator plate designed as metal wedge |
-
2011
- 2011-04-07 PL PL394473A patent/PL224360B1/en unknown
-
2012
- 2012-03-23 EP EP12720691.0A patent/EP2694925A1/en not_active Withdrawn
- 2012-03-23 WO PCT/PL2012/000015 patent/WO2012138239A1/en unknown
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2012138239A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL394473A1 (en) | 2012-10-08 |
PL224360B1 (en) | 2016-12-30 |
WO2012138239A1 (en) | 2012-10-11 |
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