WO2014182182A2 - Dispositif de distribution de matériau granulaire et procédé de distribution de matériau granulaire - Google Patents

Dispositif de distribution de matériau granulaire et procédé de distribution de matériau granulaire Download PDF

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Publication number
WO2014182182A2
WO2014182182A2 PCT/NZ2014/000086 NZ2014000086W WO2014182182A2 WO 2014182182 A2 WO2014182182 A2 WO 2014182182A2 NZ 2014000086 W NZ2014000086 W NZ 2014000086W WO 2014182182 A2 WO2014182182 A2 WO 2014182182A2
Authority
WO
WIPO (PCT)
Prior art keywords
granular material
dispensing
free
exit orifice
dispensing means
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.)
Ceased
Application number
PCT/NZ2014/000086
Other languages
English (en)
Other versions
WO2014182182A3 (fr
Inventor
Peter BATTENSBY
Shane Mark BLATCHFORD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ORMOND ENGINEERING Ltd
Original Assignee
ORMOND ENGINEERING Ltd
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 ORMOND ENGINEERING Ltd filed Critical ORMOND ENGINEERING Ltd
Publication of WO2014182182A2 publication Critical patent/WO2014182182A2/fr
Publication of WO2014182182A3 publication Critical patent/WO2014182182A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B37/00—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged
    • B65B37/16—Separating measured quantities from supply
    • B65B37/20—Separating measured quantities from supply by volume measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B37/00—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged
    • B65B37/08—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged by rotary feeders
    • B65B37/12—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged by rotary feeders of centrifugal type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/001—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups for fluent solid material

Definitions

  • the present invention relates to a dispensing device for delivering precise and multiple doses of free-flowing granular material.
  • the device is adaptable to a specific type of free-flowing granular material or to different applications requiring the delivery of precise and multiple doses of free-flowing granular material. Also provided is a method of dispensing precise doses of free- flowing granular material.
  • the present invention provides a quantitative dispensing device, suitable for dispensing one or more volumes of a free-flowing granular material by gravity feed, comprising:
  • a device housing that houses (i) a granular material conduit member that has an entry orifice that in use receives the granular flowable material and an exit orifice through which the granular flowable material flows when in use;
  • a dispensing means that is positioned beneath the exit orifice and having a receiving surface onto which, and when in use, a stabilised pile of the granular flowable material is formed as the granular material flows from the exit orifice of the conduit member, the size of the exit orifice and the size of the dispensing means being determined by the specific static angle of repose of the granular material and the desired volume of dispensed granular material,
  • a rotary actuator that in use is activated to rotate the dispensing means at a speed and for a time sufficient to displace at least a portion of any granular material on the dispensing means;
  • a receiving means that in use receives the displaced granular material and directs the flowing granular material through an outlet of the device.
  • the exit orifice is positioned off-centre relative to the central axis of the device. In a further embodiment the exit orifice is provided by an exit orifice plate defining the exit orifice diameter.
  • exit orifice plate is replaceable with one or more orifice plates having an alternative sized exit orifice diameter.
  • exit orifice plate is replaceable with one or more orifice plates having an alternative thickness.
  • the conduit member is a hopper.
  • conduit member is proximate to a further granular material feed means, such as a hopper or a granular material conveyor means or the like.
  • dispensing means is replaceable with an alternative sized dispensing means.
  • the dispensing means has a side wall that is angled outwardly at about 135 degrees relative to the receiving surface of the dispensing means.
  • the dispensing means is further adapted to include an impeller on its receiving surface to increase the amount of displacement of the granular material when the device is in use.
  • the receiving funnel is positioned off-centre relative to the central axis of the entry orifice. In one embodiment the device does not include any component made from or including silicone.
  • a method of quantitatively dispensing one or more volumes of a free-flowing granular material by gravity feed including;
  • the free-flowing granular material is selected from the likes of x-ray flux, sugar, salt, coffee and other granular materials. In one embodiment the free-flowing granular material is x-ray flux, comprising lithium tetraborate and lithium metaborate.
  • multiple volumes of the free-flowing granular material are dispensed by multiple actuations of the rotary actuator.
  • multiple volumes of the free flowing granular material are dispensed by the device on a continuous basis. In one embodiment several hundred thousand volumes of the free flowing granular material are dispensed by the device on a continuous basis.
  • Figure 1 shows a side cross sectional view of a quantitative dispensing device, having a full hopper of a granular free-flowing material.
  • Figure 2 shows a side cross sectional view of a quantitative dispensing device, having a full hopper and further showing the dispensing of a granular free-flowing material.
  • Figure 3 shows a side cross sectional view of a quantitative dispensing device, having an empty hopper.
  • Figure 4 shows a side cross sectional view of a dispensing means of the present invention.
  • Figure 5(a) shows a top perspective view of an impeller for use with a dispensing device of the present invention
  • Figure 5(b) shows a bottom plan view of the impeller shown in Figure 5(a)
  • Figure 5(c) shows a side view of the impeller shown in Figure 5(a) and Figure 5(b).
  • Figure 6 shows an exploded perspective view of the components of the device of the present invention and including an impeller shown in Figures 5(a)-5(c).
  • Figure 7 shows an exploded side view of the components of the dispensing device and the hidden detail of the internally located features of the device.
  • Figure 8 shows a plot of the results obtained from dispensing 50 samples of x- ray flux from a dispensing device of the present invention.
  • off centre means having an axis of rotation deviating from the geometrical center or central axis of the device.
  • static angle of repose of a granular material as used herein is the steepest angle of descent or dip of the slope relative to the plane of the receiving surface when granular material on the slope face is on the verge of sliding. This angle is in the range 0°-90°.
  • the internal angle between the surface of the stationary pile and the receiving surface is known as the static angle of repose and is related to the density, surface area and shape of the particles, and the coefficient of friction of the material.
  • the angle of repose for granular materials determines how high and how wide a material will spread. Material with a low angle of repose forms flatter piles than a material with a high angle of repose.
  • dynamic angle of repose of a granular material as used herein is the angle of repose of the slope of the free surface of the material relative to the horizontal measured as the granular material is rotated in a cylinder at a predetermined rate.
  • the dynamic angle of repose is always less than the static angle of repose.
  • the device 1 includes a housing 3 that houses a hopper 4.
  • the hopper 4 has at its upper end an entry orifice 5 (best seen in Figure 3) that in use receives the granular flowable material 2 and at the lower end an orifice exit plate 6 through which the granular flowable material exits.
  • the device also includes a dispensing means, shown as cup 7 that is positioned beneath the orifice plate 6.
  • the cup 7 has a side wall that is outwardly extending away from the centre of the cup and a receiving surface 8 onto which a stabilised pile of the granular flowable material flows from the orifice exit plate of the hopper. It is to be appreciated that the size of the orifice exit plate 6 and the size of the cup 7 are determined by the specific static angle of repose 9 of the granular material 2.
  • a rotary connection unit 11 can be activated by a rotation unit 10 to rotate the dispensing cup 7 at a speed and for a time sufficient to displace at least a portion of any granular material in the cup 7.
  • a receiving funnel 12 receives the displaced granular material 2 and directs the flowing granular material 2 out of the lower portion of the device housing 13 through outlet 14.
  • FIG 3 a quantitative dispensing device 1 , not including any granular material is shown.
  • the hopper inlet 5 is shown and at the lower end of the hopper the orifice exit plate 6 defines the hopper outlet 16 through which any granular flowable material would exit.
  • the amount of granular material that falls from the hopper into the cup can be readily adjusted by replacing the orifice plate 6 with one from a set which is provided in various diameters and thickness. This ability to vary these parameters provides a sufficient range of adjustment to cover a wide range of doses of granular material that are proportionate to the scale of the device.
  • various cup shapes and cup surface profiles could also be used to adjust the amount of granular material displaced from the cup surface.
  • FIG. 4 One such cup profile is shown in Figure 4.
  • the cross sectional view shown in Figure 4 shows that the diameter 7(a) of the receiving surface of the cup is about 16 mm.
  • the diameter 7(b) of the mouth of the cup is about 22 mm.
  • the depth 7(c) of the cup is about 3 mm.
  • the length 7(d) of the side wall is about 5 mm.
  • the thickness 7(e) of the side wall is about 1.5 mm.
  • the angle between the receiving surface of the cup and the side wall of the cup is about 135 degrees. It is also to be appreciated that the scale of the device can be adjusted to suit the particular application to which the device is to be put.
  • an impeller 17 can be connected or integrated into the receiving surface of the cup 7 to aid in the dispensing of larger amounts of the granular material from the cup.
  • the pile of granular material Whilst the cup is rotating, the pile of granular material is placed in torsional shear and the pile of granular material is also subjected to centrifugal force.
  • the pile of granular material becomes destabilised as its angle of repose decreases from the static angle to below the dynamic angle. It is thought that these conditions (either singly or together) cause the granular material to flow over the lip of the cup, onto the funnel and out of the device via the outlet port.
  • an impeller is included or integrated into the receiving surface of the cup it is thought that the effects of the forces involved in destabilizing the granular material are increased and this thereby means that more granular material is displaced from the cup when using an impeller.
  • the central axis of the rotary actuator/rotary mechanism and cup assembly is positioned off-centre from the hopper 4 and orifice plate 6. This positioning is to allow more internal space for the outlet port and minimises the external dimensions of the housing. It is to be appreciated that if space saving is not a vital aspect then such off-centering is an optional feature.
  • the specific embodiment and components illustrated in Figures 6 and 7 has been developed for measuring precise and reproducible quantities of powdered X-ray flux, comprising 35.3% Lithium Tetraborate and 64.7% Lithium Metaborate.
  • the components of orifice plate 6, impeller 17, the housing base plate 18(may be aluminium), shaft 22, flanged bearing 23 and cup 7 can all be constructed from stainless steel or some other suitable inert material.
  • An o-ring 24 is used between the cup 7 and the flanged bearing 23.
  • the housing 3, hopper 4, funnel 12, solenoid and bearing mount 21 and outlet fitting 19 from the device may be constructed from a polymer material, such as a plastics or thermoplastic polymer such as polyoxymethylene, also known as acetal, polyacetal and polyformaldehyde that can be shaped to provide a polymer surface that can withstand significant levels of wear while offering low friction, good stability and substantial mechanical strength.
  • the rotary solenoid 20 used as the rotary actuator may be an off the shelf solenoid such as a Solenoid G DA 035. The components of the device are secured in place by socket screws 25 or grub screw 26.
  • a device according to Figure 1 was constructed to dispense x-ray flux, comprising 35.3% Lithium Tetraborate 64.7% Lithium Metaborate.
  • the dimensions of the device include the following:
  • the gap between the orifice exit plate and the cup was 3.6mm;
  • the diameter of the orifice exit plate was 14 mm.
  • the solenoid current was repeatedly measured at 0.28A
  • the target dispensing weight was 0.25 gms per dispensing cycle.
  • the hopper was filled with the granular x-ray flux material.
  • the solenoid was activated for a cycle of about 0.8 seconds.
  • the cycle includes a 0.3 second "on” phase or rotation phase through which the cup is rotated about 15 degrees and a 0.5 "off phase during which the return spring resets.
  • the device has the advantage, when compared to other units available, of being made of effectively inert materials, stainless steel and plastics/polymeric material.
  • the absence of any silicon based materials is a significant advantage.
  • a further advantage of the present invention is that, aside from the friction of the granular material as it flows onto and off the hopper surface, receiving surface of the cup or the funnel surface, no granular material is being trapped or forced against a moving surface or component.
  • the absence of components rubbing or flexing across or against the granular material eliminates wear and tear that is usually seen in quantitative granular dispensing devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

La présente invention se rapporte à un dispositif de distribution destiné à distribuer des doses multiples et précises de matériau granulaire à écoulement libre. Le dispositif peut être conçu pour un type spécifique de matériau granulaire à écoulement libre ou à différentes applications nécessitant la distribution de doses multiples et précises de matériau granulaire à écoulement libre. La présente invention se rapporte également à un procédé de distribution de doses précises de matériau granulaire à écoulement libre.
PCT/NZ2014/000086 2013-05-09 2014-05-09 Dispositif de distribution de matériau granulaire et procédé de distribution de matériau granulaire Ceased WO2014182182A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ610436 2013-05-09
NZ61043613 2013-05-09

Publications (2)

Publication Number Publication Date
WO2014182182A2 true WO2014182182A2 (fr) 2014-11-13
WO2014182182A3 WO2014182182A3 (fr) 2015-03-26

Family

ID=51867833

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2014/000086 Ceased WO2014182182A2 (fr) 2013-05-09 2014-05-09 Dispositif de distribution de matériau granulaire et procédé de distribution de matériau granulaire

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664694A1 (fr) * 1990-07-12 1992-01-17 Sedepro Dispositif doseur de produits en grains ou pulverulents.
JP3584092B2 (ja) * 1995-09-07 2004-11-04 三井化学株式会社 粉体定量供給装置
JP4884718B2 (ja) * 2005-08-17 2012-02-29 株式会社ヨシカワ 材料供給装置における粉粒体供給機
JPWO2008146593A1 (ja) * 2007-05-25 2010-08-19 塩野義製薬株式会社 粉粒体供給装置

Also Published As

Publication number Publication date
WO2014182182A3 (fr) 2015-03-26

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