WO2004111579A1 - Debitmetre - Google Patents

Debitmetre Download PDF

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Publication number
WO2004111579A1
WO2004111579A1 PCT/JP2003/007494 JP0307494W WO2004111579A1 WO 2004111579 A1 WO2004111579 A1 WO 2004111579A1 JP 0307494 W JP0307494 W JP 0307494W WO 2004111579 A1 WO2004111579 A1 WO 2004111579A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
flow rate
paint
flow meter
flow
Prior art date
Application number
PCT/JP2003/007494
Other languages
English (en)
Japanese (ja)
Inventor
Hwa-Soo Lee
Takazou Yamada
Sakari Yokoyama
Original Assignee
Nihon University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nihon University filed Critical Nihon University
Priority to PCT/JP2003/007494 priority Critical patent/WO2004111579A1/fr
Priority to JP2005500754A priority patent/JP4537314B2/ja
Priority to AU2003242336A priority patent/AU2003242336A1/en
Publication of WO2004111579A1 publication Critical patent/WO2004111579A1/fr

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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

Definitions

  • the present invention relates to a flow meter for measuring a flow rate of a fluid such as paint.
  • FIG. 12 is a cross-sectional view of a flow channel in which a flow meter is arranged.
  • an impeller 105 is arranged in a flow path 103 constituted by a tube 101.
  • An electric motor 107 is connected to the impeller 105.
  • the electric motor 107 is connected to a constant voltage power supply 109.
  • a current detector 111 is connected to the motor 107 and the constant voltage power supply 109.
  • the indicator 1 1 3 is connected to the current detector 1 1 1. Therefore, the electric motor 107 is driven at a constant voltage by the constant voltage power supply 109.
  • the load current of the electric motor 107 changes. This change is detected as a change in the current value by the current detector 111, converted into a voltage, and output to the display 113.
  • the display unit 113 can display a flow rate change according to the voltage conversion.
  • the entire impeller 105 and the motor 107 are The impeller 105 is disposed in the flow path 103 and the impeller 105 faces the flow direction. For this reason, measurement may be difficult when the flow rate is small.
  • the kinetic energy of the fluid is transferred to the impeller 105
  • the flow rate is measured by applying the force, but the kinetic energy in the flow direction of the fluid is converted into the orthogonal rotation of the impeller 105, so the waste of kinetic energy acting on the impeller 105 from the fluid is reduced.
  • a mobile phone housing, a cosmetic container, or a toy is sprayed with a spray gun to paint in various colors.
  • the paint is pumped from one pump to a plurality of spray guns.
  • the pump and each spray gun are connected by relatively thin tubes, and the paint is pumped from the pump to each spray gun through each tube.
  • the flow rate of paint that is pumped from one pump to each spray gun is basically the same if the channel length is the same.
  • the length of the tube from the pump to each spray gun may be different, and the flow rate reaching each spray gun may be different due to the difference in flow path length . If paint is sprayed from each spray gun in such a state, there is a possibility that remarkable unevenness of coating may be caused for each object to be coated due to a flow rate error of each spray gun. Therefore, it is important to measure the flow rate of paint that is pumped to each spray gun and spray the paint while adjusting the flow rate for each spray gun.
  • an example of the flow rate of the paint in the pipe is about 50 m1 Zmin, for example, about a water drop dropped when a water tap is closed.
  • it is extremely difficult or extremely error-prone to measure the flow rate of a paint having such a small flow rate with a flow meter as shown in FIG. Therefore, when a flow meter as shown in Fig. 11 is used, there is a possibility that the coating unevenness cannot be improved even though the paint is sprayed while measuring the flow rate.
  • the electric motor 107 is arranged in the flow passage 103 as shown in FIG. 12, in the case of a paint or the like, the heat generated by the electric motor 107 and the spa There is also a possibility that a fire may occur due to the action of one stroke.
  • FIG. 13 there is a flow meter as shown in FIG. 13 described in Japanese Patent Application Laid-Open No. 7-55514.
  • an impeller 2 17 is rotatably supported in a case 2 15 and a magnet 2 19 is built in the impeller 2 17.
  • the shaft part 221 contains, for example, a Hall element 223.
  • the impeller 2 17 receives the fluid flowing from the opening 2 24 and rotates, and the Hall element 2 23 detects the rotation of the magnet 2 19 to measure the flow rate.
  • the fluid flowing from the opening 222 is received in the rotating direction by the blades 222 of the impeller 21 as compared with the flow meter of FIG. It can be said that the flow energy can be efficiently transmitted as the rotation of the impeller 217 and the flow path resistance can be reduced, which is suitable for measuring a small flow rate. Also, since the motor is not arranged in the flow path, there is no risk of fire.
  • the magnet 219 is embedded in the impeller 2 17, which imposes a limit on the weight reduction of the impeller 2 17, and as described above, the minute flow rate of paint etc. There is a limit to improving the accuracy of the measurement.
  • An object of the present invention is to provide a flow meter that can measure a flow rate of a minute flow rate easily and accurately.
  • An object of the present invention is to provide a case having a fluid inflow path and a fluid outflow path, and a vane portion provided on the outer periphery of a disk portion.
  • a flowmeter for measuring a flow rate based on the rotation speed of the impeller comprising: an impeller that rotates in accordance with a receiving flow rate at a section; and a rotation speed detection unit that detects a rotation speed of the impeller.
  • the rotation number detecting means includes: a detection target portion provided by a change in the surface state of the disk portion; and a detection tool attached to the case and capable of detecting the detection target portion in a non-contact manner. Achieved.
  • the detection target portion is provided by processing a concave portion or a hole portion in the disk portion.
  • the inflow path of the fluid is disposed to face the blade section, and the outflow path is disposed to face the rotation center of the disk section. Therefore, even if bubbles generated by the rotation of the impeller gather at the rotation center side of the impeller due to the difference in specific gravity with the fluid, the bubbles can be smoothly discharged from the outflow passage arranged opposite to the rotation center of the disk part. it can. For this reason, if bubbles are present, the impeller receives rotational resistance against the case due to surface tension and the like, which may adversely affect the flow rate measurement of the minute flow rate. The smooth discharge of the bubbles suppresses the effects of the bubbles. However, not only normal flow rate measurement but also minute flow rate measurement can be performed easily and accurately.
  • the flow meter according to the present invention is provided with display means for displaying the flow rate based on the number of revolutions, wherein the inflow path and the outflow path are connected to a supply path for supplying paint to a spray gun for painting.
  • FIG. 1 is an overall schematic configuration diagram of a coating apparatus provided with a flow meter according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a flow meter main body according to an embodiment of the present invention, as viewed from a plane.
  • FIG. 3 is a sectional view taken along the line SA-SA in FIG.
  • FIG. 4 is an enlarged sectional view of a main part of a flow meter main body according to one embodiment of the present invention.
  • FIG. 5 is a plan view of an impeller of the flow meter main body according to one embodiment of the present invention. The figure is a cross-sectional view of the impeller of the flowmeter main body according to one embodiment of the present invention.
  • FIG. 7 is a graph showing the experimental results of the embodiment of the present invention.
  • FIG. 8 shows a flowmeter main body according to another embodiment of the present invention, which is FIG.
  • FIG. 9 is a cross-sectional view taken along the line SB-SB in FIG.
  • FIG. 10 is a cross-sectional view of a flow meter main body according to still another embodiment of the present invention viewed from a plane.
  • FIG. 11 is a cross-sectional view taken along the line SC-SC in FIG.
  • FIG. 12 is a schematic diagram of a flow meter according to a conventional example.
  • FIG. 13 is a sectional view of a main part of a flow meter according to another conventional example.
  • FIG. 1 shows an overall schematic configuration diagram of a coating apparatus to which a flow meter according to an embodiment of the present invention is applied.
  • the coating apparatus 1 includes a spray gun 3, a pump 5, and a coating tank 7, and has a flow meter 9 between the spray gun 3 and the pump 5. That is, the flow meter 9 according to the embodiment of the present invention is applied to the coating apparatus 1, and the fluid to be measured by the flow meter 9 is a paint.
  • the spray gun 3 is for spraying paint on a housing of a mobile phone, a container for cosmetics, a toy or the like, which is an object to be painted.
  • the spray gun 3 is provided with an adjustment dial 11 for finely adjusting the spray amount. By adjusting the adjustment dial 11, the squeeze in the spray gun 3 can be adjusted and the spray amount can be adjusted.
  • the spray gun 3 is connected to the outlet of the flow meter 9 via a tube 13 which constitutes a paint supply path, and is pumped through a tube 15 which constitutes a paint supply path to the inflow passage of the flow meter 9. 5 is connected.
  • the pump 5 is connected to the paint tank 7 via a pipe 17.
  • Each of the tubes 13 and 15 is, for example, a Teflon tube whose diameter is as small as 4 to 6 mm, and the flow rate of the flowing paint is a minute flow rate.
  • the flow rate in the tubes 13 and 15 is 50 m1 Zmin, and the internal pressure is :! Has become a ⁇ 1 5 kg / cm 2 about..
  • the tube 13 is supported on a support 21 by a holding member 19.
  • the holding member 19 can adjust the vertical height with respect to the support column 21 by loosening the handle 23.
  • the column 21 supports the flowmeter 9.
  • the flow meter 9 has a display 25 on a housing 25.
  • the display section 27 is adapted to digitally display the measured flow value.
  • the pump 5 is provided, for example, with one pump, and each of the spray guns 3 is connected to the respective spray guns 3 via separate tubes 15, 13,. , ...It is connected to the.
  • a flow meter 9 is also provided for each spray gun 3,.
  • FIG. 2 is a cross-sectional view of a flow meter main body according to an embodiment of the present invention viewed from a plane
  • FIG. 3 is a cross-sectional view taken along line SA-SA of FIG. 2
  • FIG. Fig. 5 is an enlarged sectional view
  • Fig. 5 is a plan view of the impeller
  • Fig. 6 is a sectional view of the impeller.
  • the sectional positions of the upper half and the lower half are different.
  • FIG. 2 and FIG. 3 show the flow meter main body 29 fixed in the housing 25.
  • the flowmeter main body 29 includes a case 31, an impeller 33, and a proximity sensor 35 as rotation speed detecting means.
  • the flow meter body 29 is supported in the housing 25 so that the impeller 33 rotates horizontally.
  • the arrangement state of the flow meter body 29 is not particularly limited, and the impeller 33 can be arranged so as to rotate in the vertical direction.
  • FIGS. 1 is made of a light metal such as aluminum and has high chemical resistance and light weight.
  • Case 3 1 The base part 37 and the lid part 39 are combined.
  • the base portion 37 is provided with a female screw portion 41 for fastening in a square shape.
  • An accommodation recess 43 having a circular cross section is provided at the center of the base portion 37.
  • a support hole 45 is provided at the center of the accommodation recess 43.
  • an escape recess 46 is provided to face the proximity sensor 35.
  • a seal groove 47 is provided around the outer periphery of the housing recess 43 in a circular shape.
  • the base portion 37 is provided with an inflow channel 49 and an outflow channel 51, and the inflow channel 49 and the outflow channel 51 are formed so as to communicate with the housing recess 43.
  • the inflow path 49 and the outflow path 51 are arranged so as to be mutually linear along the tangential direction of the rotating circle of the impeller 33.
  • the inner diameter and the arrangement position of the inflow channel 49 are specified in relation to the impeller 33, but the inner diameter and the arrangement position of the outflow channel 51 can be set relatively freely.
  • the inflow path 49 is set to have a diameter of 0.5 mm in relation to the flow rate of the paint, and is arranged such that the paint flowing from the inflow path 49 is received in the rotation direction of the impeller 33. Is set.
  • the diameter of the inflow channel 49 can be set to a value other than 0.5 mm in relation to the flow rate of the paint.
  • the inflow channel 49 communicates with the housing recess 43 at a position slightly inward of the inner circumferential surface of the housing recess 43. As a result, the paint flowing in from the inflow path 49 hits one blade 73, and the blade 73 rotates and moves due to the energy of the paint, and the next blade 73 flows in.
  • the outflow channel 51 is formed larger in diameter than the inflow channel 49 in order to reduce the outflow resistance.
  • the inflow path 49 and the outflow path 51 are formed with an inlet 53 and an outlet 55 which are formed by female threads.
  • the tube 15 is screw-connected to the inlet 53, and the tube 13 is screw-connected to the outlet 55.
  • the lid 39 is provided with a convex portion 57 having a circular cross section.
  • a support hole 58 is provided at the center of the protrusion 57.
  • Female thread 5 9 Is provided.
  • the female screw portion 59 is for screwing and supporting the proximity sensor 35.
  • the cover 39 has a square through hole 61 corresponding to the female screw 41 of the case 31.
  • the lid 39 is fitted to the base 37, the projection 57 is fitted into the accommodation recess 43, and the blade accommodation space 63 is formed in the case 31.
  • the ports 65 are individually inserted into the through holes 61 from the lid 39 side, and the bolts 65 are fastened to the female threads 41 to fasten the lid 39 to the base 37. Fixation has been made.
  • An O-ring 67 is housed and held in the seal groove 47 so as to be in close contact with the lid 39 side, thereby sealing the blade housing space 63.
  • the impeller 33 is rotatably accommodated and supported in the blade accommodating space 63 of the case 31, and receives the paint flowing in from the inflow passage 49 in the rotating direction at the blade 73, and receives the paint. It rotates according to the flow rate.
  • the impeller 33 is made of a light metal such as aluminum and has high chemical resistance, low specific gravity and low moment of inertia.
  • the impeller 33 can be formed of another material as long as it has similar characteristics.
  • the impeller 33 can be formed of a fluororesin such as Teflon (registered trademark).
  • the impeller 33 will be described with reference to FIGS.
  • the impeller 33 is formed to have a diameter of about 20 mm and a thickness of about lmm in relation to the flow rate of the paint.
  • the impeller 33 may have other sizes.
  • the impeller 33 has a plurality of blade portions 73 connected to the outer periphery of the disk portion 71.
  • the blade portion 73 is formed in a saw blade shape and has directionality in the rotation direction.
  • the blade portion 73 can be formed in a symmetrical shape in the rotation direction.
  • a fitting hole 75 is provided at the center of the disc portion 71.
  • Mating hole 7 5 Is such that it is rotatably supported on the support shaft 69 without backlash.
  • the impeller 33 is provided with a detection target portion 77, which constitutes a rotation speed detecting means together with the proximity sensor 35, by changing the surface configuration of the disk portion 71. Specifically, the surface morphology is changed by processing a concave portion 79 in the disk portion 71.
  • the concave portions 79 are provided evenly at equal intervals in the rotation direction. In the present embodiment, the concave portions 79 are provided at four positions in a 90 ° arrangement.
  • the space 81 between the recesses 79 is relatively convex with respect to the recess 79, and the recess 79 and the space 81 constitute the detection target portion 77.
  • the detection target portion 77 can also be provided by penetrating holes at regular intervals in the rotation direction in the disk portion 71 to change the surface form.
  • the surface morphology is changed by providing protrusions on the surface of the disk portion 71 at regular intervals in the rotation direction.
  • the protrusion can be used as a reinforcing rib, and the entire disk portion 71 can be further thinned.
  • the impeller 33 is formed of a fluororesin, for example, an aluminum surface is provided on the disk portion 71 at equal intervals in the rotational direction to change the surface form of the disk portion 71, and the detection by the proximity sensor 35 is performed.
  • an aluminum foil is attached to the surface of the disk portion 71 made of fluororesin, or a concave portion is formed on the surface of the disk portion 71, and the aluminum plate is accommodated in the concave portion. It can be considered that the surface of the disk part 71 is formed to be flush with the disk part 71, and a rod-shaped aluminum material is fixed to the disk part 71 at a constant interval in the rotation direction.
  • the impeller 33 is rotatably supported by a support shaft 69.
  • the support shaft 69 is formed of a fluororesin such as Teflon (registered trademark), and is fitted and fixed to the support holes 45, 58.
  • Teflon registered trademark
  • a small gap of about 0.25 mm allowing relative rotation is formed between the blade portion 73 and the inner peripheral surface of the housing recess 43.
  • a slight gap of about 0.5 mm is also formed between the surface of the disk portion 71 of the impeller 33 and the housing recess 43. Other sizes of these gaps can be selected.
  • the impeller 33 rotates and slides with respect to the support shaft 69, the frictional resistance of the impeller 33 to the support shaft 69 is reduced because the support shaft 69 is formed of fluororesin. be able to. Further, since the support shaft 69 is formed of a fluororesin, the chemical resistance to thinner and the like is improved.
  • the material of the support shaft 69 is not particularly limited as long as it has chemical resistance and a low coefficient of friction. For example, jewelry such as sapphires and the like can be used.
  • the support shaft 69 When the weight limitation of the impeller 33 is relaxed, the support shaft 69 is fixed to the impeller 33, and the support shaft 69 is rotatably supported in the support holes 45, 58. It can also be configured. Conversely, the support shaft 69 may be omitted, and the outer periphery of the impeller 33 may be guided to rotate by the inner peripheral surface of the housing recess 43. In this case, the number of parts is further reduced, and assembly and parts management become easier.
  • washers 85, 87 are provided on both sides of the impeller 33.
  • the washers 85 and 87 are made of, for example, a fluororesin, and have high chemical resistance and a low friction coefficient to reduce the frictional resistance to the impeller 33.
  • the washers 85, 87 are press-fitted to the support shaft 69, and position the impeller 33 in the direction along the axis of the support shaft 69. In this positioning state, the impeller 33 is rotating relative to the washers 85, 87.
  • the washers 85 and 87 can be configured to be rotatable relative to both the impeller 33 and the support shaft 69.
  • the proximity sensor 35 is screwed and fixed to the female screw portion 59 of the case 31.
  • the tip of the proximity sensor 35 projects into the blade accommodating section 63, for example, by about 0.6 mm.
  • a gap of about 0.3 mm is formed between the tip of the proximity sensor 35 and the disk portion 71 of the impeller 33, and the proximity sensor 35 causes the detection target portion 77 to be in a non-contact state. It can be detected.
  • the protrusion amount of the proximity sensor 35 and the gap with respect to the disk portion 71 are set to other sizes. You can also.
  • the proximity sensor 35 detects the gap 81 by the rotation of the impeller 33, becomes non-detected in the recess 79, and outputs a digital signal by repeating this detection and non-detection. .
  • the rotation speed of the impeller 33 is counted by the controller of the flow meter 9 based on the output of the proximity sensor 35.
  • the flow rate is calculated based on the counted number of rotations, and is digitally displayed on the display unit 27. That is, the flow rate is measured based on the rotation speed of the impeller 33.
  • the paint is supplied as a fluid from the paint tank 7 to the spray gun 3 through the pipe 17, the pump 5, the tube 15, the flow meter 9, and the tube 13.
  • the spray amount is adjusted by adjusting the adjustment dial 11, so that the spray amount can be made uniform between the spray guns 3 and uniform application can be performed.
  • the flow path length between each of the spray guns 3 and each of the flow meters 9 is set to be uniform, it is necessary to display the flow meter 9 in order to ensure a uniform injection amount between the spray guns 3. Adjust the adjustment dial 1 1 while looking at section 27. Thereby, the spray amount from each spray gun 3 can be finely adjusted, and the spray amount can be made uniform for each spray gun 3 so that the target object can be uniformly applied.
  • the paint flows from the inlet 53 in FIG. 2 and further flows into the blade accommodating space 63 from the inflow passage 49. Inflow The paint is received by the blade portion 73 of the impeller 33.
  • the blade portion 73 receives a driving force in the same direction as the direction of the kinetic energy of the flow of the paint, so that energy can be efficiently transmitted from the paint to the blade portion 73.
  • the impeller 33 rotates around the support shaft 69 according to the flow rate of the paint.
  • the paint that has driven the blades 73 travels straight and flows out of the outflow channel 51, and flows from the outlet 55 to the tube 13.
  • the paint is supplied from the tube 13 to the spray gun 3 as described above.
  • the rotation of the impeller 33 is detected by a proximity sensor 35.
  • the proximity sensor 35 repeats non-detection and detection by the concave portion 79 and the intermediary portion 81, and outputs a digital signal.
  • the controller of the flow meter 9 counts the digit signal and calculates the rotation speed of the impeller 33, and calculates the flow rate of the paint based on the rotation speed.
  • the calculated flow rate is digitally displayed on the display unit 27 of the flow meter 9 as a measured value.
  • the operator can adjust the adjustment dial 11 while looking at the display section 27, and can make the spray amount of each spray gun 3 uniform.
  • FIG. 7 shows a measurement result obtained by the flow meter 9 according to the embodiment of the present invention.
  • a mixed solution of paint (30%), a solvent such as a thinner of about 70%, and tap water were used.
  • the water pressure of the tap water and the liquid pressure of the mixed solution are both 0.15 MPa.
  • the value of 0.15MPa was assumed for actual painting. Of course, other pressure values can be used as the actual pressure of the mixture depending on the conditions.
  • the number of pulses is plotted on the vertical axis, and the flow rate is plotted on the horizontal axis.
  • the symbol ⁇ indicates the result of tap water W
  • the symbol ⁇ indicates the result of paint (the mixed liquid) P.
  • the detection target portion 77 is formed by changing the surface morphology by processing the concave portion 79 on the disk portion 71, and it is not necessary to embed the magnet in the impeller 33 as in the conventional case. 33
  • the weight of 3 can be reduced to reduce the moment of inertia. Further, since the magnet is not embedded in the impeller 33, the weight of the impeller 33 can be easily balanced, and the rotational imbalance can be suppressed. Further, even if the number of detection target portions 77 is increased to improve the measurement accuracy, only the concave portion 79 is processed, so that the weight increase of the impeller 33 can be reliably suppressed and the increase in the moment of inertia can be suppressed.
  • the minute flow rate of highly viscous paint can be measured without difficulty.
  • the impeller 33 is rotatable relative to the support shaft 69 and the washers 85, 87, so that the moment of inertia of the impeller 33 can be minimized.
  • the flow rate can be measured easily and accurately.
  • the inflow channel 49 and the outflow channel 51 are linearly arranged along the tangential direction to the rotating circle of the impeller 33, the kinetic energy of the paint flowing from the inflow channel 49 is reduced.
  • the blades 73 can receive the waste as it is without waste, and the outflow channel 51 can suppress the outflow resistance and discharge smoothly, and even the paint with a small flow rate can measure the flow rate accurately and effortlessly.
  • Can The paint flowing in from the inflow channel 49 hits one blade portion 73, drives the blade portion 73, and moves the next blade portion 73 corresponding to the inflow channel 49 by the movement of the blade portion 73.
  • the paint flowing from the inflow passage 49 can be sufficiently applied to the front blade portion 73, and the kinetic energy of the paint can be surely converted as the rotation of the impeller 33, so that the minute Even with paint with a flow rate, flow measurement can be performed reasonably accurately.
  • the coating apparatus 1 it is necessary to change the color of the paint according to the object to be coated.
  • paint colors there are various paint colors, but metallic powders may be mixed with metallic colors.
  • the rotation of the impeller 33 is detected by a magnetic field, the change in the magnetic field is affected by the metal powder, and the flow rate cannot be measured.
  • the rotation of the impeller 33 is detected by light, if the fluid is a paint, the light does not pass and the flow rate cannot be detected.
  • the paint from the fuel tank 7 to the spray gun 3 is entirely washed with a thinner. That is, a thinner is accommodated in the fuel tank 7 and the pump 5 is driven to connect the thinner in the fuel tank 7 to the pipe 17, the pump 5, the tube 15, the flow meter 9, the tube 13, and the spray gun 3.
  • the paint used previously is washed by passing it and ejecting it from the spray gun 3.
  • the thinner reaches the inside of the blade accommodating space 63 by the rotation of the impeller 33, so that each part can be washed.
  • the paint of another color is stored in the fuel tank 7, and the pump 5 is rotated again to spray the paint of another color on the object to be painted in the same manner as described above.
  • FIG. 8 is a cross-sectional view as viewed from above
  • FIG. 9 is a cross-sectional view taken along the line SB-SB in FIG.
  • the basic configuration is almost the same as the above embodiment, and the corresponding components are denoted by the same reference numerals.
  • the inflow channel 49 of the paint as a fluid is disposed to face the blade portion 73, while the outflow channel 51A is disposed to face the rotation center of the disk portion 71. It is.
  • the support shaft 69 A that rotatably supports the impeller 33 is cantilevered on the base 37 A side of the case 31 A. Note that, in the figure, the left and right arrangement of the base 37A and the lid 39A of the case 31A is opposite to that of the above embodiment. However, this arrangement is not particularly limited, and may be the same as in the above embodiment.
  • An outflow channel 51A is provided at the center of the lid 31A side of the case 31A.
  • the outflow channel 51A faces the end of the support shaft 69A, and has a larger diameter than the support shaft 69A.
  • the proximity sensor 35 is screwed and fixed to the base portion 37A side.
  • the tube 15 is screw-connected to the inlet 53, and the tube 13 is screw-connected to the outlet 55A.
  • the base portion 37A and the lid portion 39A are connected to each other by squares using a porto as in the above embodiment.
  • the proximity sensor 35 and the detection target unit 77 the rotation speed of the impeller 33 is detected, and flow measurement can be performed based on the rotation speed of the impeller 33.
  • the rotation of the impeller 33 may generate bubbles in the blade housing space 63.
  • the foam tends to gather toward the rotation center of the impeller 33 when the impeller 33 rotates due to a difference in specific gravity from the paint. If the bubbles remain in the blade accommodating space 63, the impeller 33 receives rotational resistance due to the surface tension or the like, which may affect the flow rate measurement of the minute flow rate.
  • the outflow path 51A is disposed opposite to the rotation center of the impeller 33, so that the bubbles collected on the rotation center side of the impeller 33 flow out together with the paint.
  • the bubbles are discharged from the passage 51A, and the bubbles can be effectively discharged from the blade accommodating space 63.
  • the remaining of the foam in the blade accommodating space 63 is suppressed, and the rotational resistance due to the foam can be suppressed or removed, and the flow rate of the minute flow rate can be measured more accurately.
  • Fig. 10 and Fig. 11 show a flowmeter body 29B according to still another embodiment
  • Fig. 10 is a cross-sectional view as viewed from a plane
  • Fig. 11 is the SC of Fig. 10.
  • -SC is a sectional view taken in the direction of the arrow. Note that, also in this embodiment, the basic configuration is almost the same as the configuration of the embodiment in FIGS. 8 and 9, and the corresponding components are denoted by the same reference numerals.
  • a pair of outflow paths 51B are provided, and the outflow paths 51B are opposed to the rotation center of the impeller 33.
  • the support shaft 69B is also supported by a support hole 58B provided in the lid 39B of the case 31B, and is supported at both ends.
  • the outflow passages 51B are symmetrically arranged so as to sandwich the support shaft 69B.
  • the number of outflow channels 51B is not limited, and will increase further.
  • the additional impeller 33 can be arranged in a circular shape around the rotation center of the additional impeller 33.
  • the outflow channel 51B can be arranged in a single arrangement.
  • the bubbles collected at the center of the impeller 33 can be discharged from the outflow passage 51B together with the paint, and the rotational resistance due to the bubbles is suppressed, so that the flow rate measurement of the minute flow rate can be accurately performed. Can be performed.
  • the support shaft 69 B is supported at both ends, so that the impeller 33 can be more reliably supported.
  • the flow meter of the present invention can be applied to all kinds of measurement, such as fuel cell fuel flow measurement and automobile fuel flow measurement, irrespective of paint flow measurement.
  • the flow meter according to the present invention is designed to spray paint from a spray gun through a tube when spraying paint from a spray gun to coat a mobile phone housing, a cosmetic container, or a toy with various colors. Suitable for measuring the flow rate of paint being pumped into the gun.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention porte sur un débitmètre consistant en un boîtier comportant un canal d'entrée et un canal de sortie, un impulseur muni d'une pale placé à la circonférence d'un disque et recevant un fluide provenant du canal d'entrée et se déplaçant en fonction du débit, un moyen de détection des tours de l'impulseur, et un moyen de mesure du débit en fonction du nombre de tours détectés. Le moyen de détection des tours comporte un élément de détection obtenu par usinage du disque ainsi qu'un outil pouvant détecter sans contact l'élément de détection fixé au boîtier.
PCT/JP2003/007494 2003-06-12 2003-06-12 Debitmetre WO2004111579A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2003/007494 WO2004111579A1 (fr) 2003-06-12 2003-06-12 Debitmetre
JP2005500754A JP4537314B2 (ja) 2003-06-12 2003-06-12 流量計
AU2003242336A AU2003242336A1 (en) 2003-06-12 2003-06-12 Flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/007494 WO2004111579A1 (fr) 2003-06-12 2003-06-12 Debitmetre

Publications (1)

Publication Number Publication Date
WO2004111579A1 true WO2004111579A1 (fr) 2004-12-23

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PCT/JP2003/007494 WO2004111579A1 (fr) 2003-06-12 2003-06-12 Debitmetre

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Country Link
JP (1) JP4537314B2 (fr)
AU (1) AU2003242336A1 (fr)
WO (1) WO2004111579A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP2010515014A (ja) * 2006-12-21 2010-05-06 ザ プロクター アンド ギャンブル カンパニー 分配測定デバイス及び分配を測定する方法
JP2012530920A (ja) * 2009-06-25 2012-12-06 ネステク ソシエテ アノニム 飲料調製装置用の流量計の構造

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JP3027007B2 (ja) * 1995-01-24 2000-03-27 マクミラン カンパニー タービンホイール式流量測定トランスデューサ
JP4058563B2 (ja) * 1997-02-06 2008-03-12 株式会社三洋物産 カウント装置

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JPS6114521A (ja) * 1984-06-27 1986-01-22 ロバ−ト　デ−．マクミラン，ジユニア ガス流量測定装置
JPS642114U (fr) * 1987-06-22 1989-01-09
JPH0674990B2 (ja) * 1990-11-10 1994-09-21 大和塗料販売株式会社 ロータリーピストン式流量計
JPH05180681A (ja) * 1991-12-27 1993-07-23 Nagoya I Ii C Kk 往復式流量計
JP3258138B2 (ja) * 1993-06-28 2002-02-18 株式会社オーバル 流量計発信器
JPH07174595A (ja) * 1993-12-20 1995-07-14 Nitto Seiko Co Ltd 分流式翼車型流量計
JP3620215B2 (ja) * 1997-04-24 2005-02-16 松下電器産業株式会社 人体局部洗浄装置

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Publication number Priority date Publication date Assignee Title
JP3027007B2 (ja) * 1995-01-24 2000-03-27 マクミラン カンパニー タービンホイール式流量測定トランスデューサ
JP4058563B2 (ja) * 1997-02-06 2008-03-12 株式会社三洋物産 カウント装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010515014A (ja) * 2006-12-21 2010-05-06 ザ プロクター アンド ギャンブル カンパニー 分配測定デバイス及び分配を測定する方法
JP2012530920A (ja) * 2009-06-25 2012-12-06 ネステク ソシエテ アノニム 飲料調製装置用の流量計の構造

Also Published As

Publication number Publication date
AU2003242336A1 (en) 2005-01-04
JPWO2004111579A1 (ja) 2006-09-28
JP4537314B2 (ja) 2010-09-01

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