WO1995008500A1 - Dispositif d'alimentation - Google Patents

Dispositif d'alimentation Download PDF

Info

Publication number
WO1995008500A1
WO1995008500A1 PCT/GB1994/002062 GB9402062W WO9508500A1 WO 1995008500 A1 WO1995008500 A1 WO 1995008500A1 GB 9402062 W GB9402062 W GB 9402062W WO 9508500 A1 WO9508500 A1 WO 9508500A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
inlet
ingredient
ingredients
air
Prior art date
Application number
PCT/GB1994/002062
Other languages
English (en)
Inventor
Maurice Leslie Hessey
Ronald William Greenwood
Original Assignee
Maurice Leslie Hessey
Ronald William Greenwood
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 Maurice Leslie Hessey, Ronald William Greenwood filed Critical Maurice Leslie Hessey
Priority to AU76623/94A priority Critical patent/AU7662394A/en
Publication of WO1995008500A1 publication Critical patent/WO1995008500A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/28—Systems utilising a combination of gas pressure and suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/24—Gas suction systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material

Definitions

  • the invention relates to feed systems and particularly, although not exclusively, to ingredient feed systems.
  • One type of conventional ingredient feed system incorporates weighing or holding hoppers for the storage or weighing of ingredients, wherein ingredients are blown into the hopper through an inlet pipe, usually in the side of the hopper, whilst a suction unit positioned at the top of the hopper sucks the ingredients in.
  • Such a conventional ' system has a number of disadvantages. Firstly it is difficult to achieve accurate metering of the ingredients. Secondly, due to the positioning of the suction unit, ingredients tend to get sucked into it and may cause malfunctioning of the suction unit itself, and/or inaccuracies in ingredient metering/weighing and there is a danger of contamination of the ingredients by the air from the blower. A further disadvantage with conventional designs of hopper, particularly as far as holding hoppers are concerned, is that certain ingredients, for instance soya, can tend to clog the hopper outlet as the ingredients stick together.
  • a feed system comprising a container having an inlet, an outlet, and a combined suction/blower unit wherein, during an inlet cycle an ingredient is sucked into the container from the inlet and, during a discharge cycle, the ingredient is blown out of the container through the outlet.
  • the outlet is closed and, preferably, during the discharge cycle the inlet is closed.
  • the combined suction/blower unit is attached to the container at a point above the inlet.
  • a filtration system is provided to prevent ingredients sucked into the container during the inlet cycle from being sucked into the combined suction/blower unit.
  • the filtration system comprises one or more filters positioned within the container.
  • the filters comprise a plurality of cylindrical filtering elements.
  • the filtering elements are attached to a partitioning plate positioned within the container, above the inlet.
  • the filter elements have a closed end and an open end, the open end being attached to the partitioning plate.
  • suction/blower unit, container, partitioning plate and filters, and inlet are so arranged as to enable the suction/blower unit to suck ingredients into the container through the inlet, an air flow path being provided between inlet, filter, the open end of each filter, partitioning plate and suction/blower unit.
  • the partitioning plate is provided with one or more baffling elements to prevent there being a direct path between inlet and filter elements, so as to encourage ingredients to move towards a bottom part of the container and to discourage them from being sucked towards the suction/blower unit.
  • the partitioning plate is positioned between a body portion of the container and a lid portion of the container.
  • the lid portion of the container is clamped to the body portion of a container by means of quick release fittings.
  • the partitioning plate, baffling element(s) and filters are coated with a non-stick finish.
  • Positioning the filters as described above not only ensures that ingredients are not sucked into the combined suction/blower unit but also preferably ensures that during the discharge cycle, ingredients which have been caught in the filter are blown off and propelled towards the outlet.
  • an air blast system is additionally provided to aid blow down of ingredients during the discharge cycle.
  • the air blast system preferably comprises an air receiver and one or more air jets.
  • the air blast system is located such that the air jets blow down through the partition plate to clean ingredients from the filter elements.
  • the air blast system may operate at the same time as the suction/blower unit is blowing during the discharge cycle. Alternatively/additionally, the air blast system may be in operation subsequent to operation of the blower unit.
  • a baffle or partition may be provided within the container to aid separation of ingredients held by the container.
  • the baffle or partition comprises a plate-like member which may be positioned within the container in a substantially vertical position.
  • the baffle or partition is attached to a side wall of the container.
  • the container may be a weighing hopper, dump hopper or mixer hopper.
  • the inlet cycle comprises the following steps:
  • the inlet is opened
  • the vent valve is closed; when a first set point is reached denoting that a certain amount of ingredient has been received within the container, the suction of ingredients is reduced;
  • the vent valve is opened allowing clean air to be drawn into the container and picking up a small amount of ingredients from the still open inlet;
  • vent valve closes, or if more ingredients are required then vent valve remains open and inlet cycle starts again with the next ingredient required.
  • an ingredient feed system comprising:
  • an inlet manifold connected to the container and having a plurality of ingredient inlets and an air inlet;
  • the ingredient feed system is substantially identical to the feed system of the first aspect of the invention, but is provided in addition with the inlet manifold which is connected to the container inlet.
  • each of the ingredient inlets and the air inlet are provided with a cut-off valve for selectively cutting off or permitting flow of the ingredient/air through the valve.
  • the system includes ingredient metering means for monitoring flow of ingredients into the container.
  • the ingredient metering means comprises a weighing means associated with the container.
  • the air inlet is provided with an air filter so that air drawn from the atmosphere is cleaned prior to being admitted into the inlet manifold.
  • the inlet manifold is connected to the container inlet by means of a flexible connection.
  • the ingredient cut ⁇ off valves are initially closed and the air cut-off valve is initially open whilst the suction/blower unit operates to suck air through the air inlet into the container inlet and through the container to the suction/blower unit.
  • a selected cut-off valve for one of the ingredient inlets is opened so as to permit flow of a selected ingredient into the container and the air cut-off valve is then closed so as to allow high-speed loading of the selected ingredient into the container.
  • the air cut-off valve is opened so as to reduce the flow of the ingredient into the container and thereby perform low-speed loading.
  • the ingredient inlet valve which is open is then closed, and a next selected ingredient may thereafter be loaded into the container, by opening a next selected ingredient cut-off valve.
  • the last selected ingredient cut-off valve may be shut, and the air cut-off valve closed shortly thereafter.
  • the air cut-off valve is preferably always open, the reason for this is to provide a through flow of air in the inlet manifold so as to ensure that the correct quantities of each of the selected ingredients is actually loaded into the container, and that negligible ingredient residue is left within the inlet manifold.
  • a container outlet valve is opened and ingredients are blown out of the container through the outlet valve.
  • a method of feeding ingredients into a container comprising the steps of:
  • the inlet cycle comprises:
  • the inlet cycle comprises an additional step of opening a vent valve prior to commencing suction and prior to opening the inlet, and, after the inlet is opened and suction commenced, the vent valve is closed.
  • the suction of ingredients is reduced.
  • the vent valve is opened to allow clean air to be drawn into the container and pick up a small amount of ingredients from the still open inlet.
  • the in-flight closes.
  • the vent valve is closed, or if more ingredients are required then the vent vale remains open and the inlet cycle starts again with the next ingredient required.
  • the inlet valve is closed, the outlet valve is opened and ingredients are blown through the outlet of the container.
  • an air blast system is provided to aid blow down of the ingredients.
  • the air blast system comprises an air receiver, connected to a number of air jets.
  • the air blast system is located above a partitioning plate which is positioned within the container between an ingredient storage area of the container and a suction/blower unit.
  • the partitioning plate attached to the partitioning plate are filters to prevent the ingredients being sucked into the suction unit.
  • the filters are cylindrical in shape and have an open end and a closed end, the open end being connected to the partitioning plate which has corresponding apertures formed therein.
  • the air blast system is arranged to create a shock wave effect.
  • a container for an ingredient feed system is provided, the container being provided with an air fluidisation system, whereby when it is desired to discharge an ingredient from the container, ingredient flow from an ingredient outlet is monitored and, if flow falls below a minimum level, air is supplied to the fluidisation system to increase said flow.
  • said fluidisation system is activated for a given time period and, if insufficient increase in flow is achieved during that time period, then an ingredient vibration means is activated to vibrate said ingredients.
  • Figures 1 and 2 are schematic views showing a front cross-section and a plan of a first embodiment of hopper
  • Figure 3 is a schematic cross-sectional view of a second embodiment of hopper
  • Figure 4 shows a hopper having a multiple inlet facility
  • Figure 5 is a schematic cross-sectional view showing a further embodiment of hopper.
  • a holding bin or hopper 1 is shown.
  • the hopper has an outlet 2 and an open top 3 into which material may be deposited.
  • a baffle plate 4 Positioned within the hopper is a baffle plate 4.
  • opening of the outlet valve 2 will cause material held within the hopper to swirl around the hopper 1 during discharge.
  • FIG. 3 another hopper 1 which may be a dump hopper, mixer hopper or weighing hopper is shown having an outlet 2 and, instead of having material loaded from the top, an inlet pipe 5 is provided.
  • hopper 1 which may be a dump hopper, mixer hopper or weighing hopper is shown having an outlet 2 and, instead of having material loaded from the top, an inlet pipe 5 is provided.
  • a filter screen 6 Positioned within the hopper 1 is a filter screen 6 and connected to the top of the hopper by means of a pipe 7 is a combined blower/suction unit 8.
  • the baffle 4 of Figures l and 2 may be provided.
  • the combined blower/suction unit 8 is turned on so as to suck air from the hopper 1 through the pipe 7. Such suction causes ingredient flow through the inlet pipe 5 into the hopper l. Ingredients which might otherwise be pulled into the combined blower/suction unit 8 are stopped from doing so by the filter screen 6.
  • the hopper shown in Figure 3 will be a weighing hopper with an "auto in-flight” mechanism and shut off of the combined blower/suction unit 8 may be achieved automatically once a desired amount of material is detected as being within the hopper 1.
  • the inlet pipe is closed, by means of a valve 9 and the outlet valve 2 is opened.
  • the combined blower/suction unit is turned on and this time, instead of sucking the unit 8 blows air through the pipe 7 into the hopper 1.
  • the system comprises a weighing hopper
  • material is sucked into the weighing hopper 1 by a suction unit which, during a discharge phase, is reversed to as to act as a blower unit.
  • the system of Figure 4 operates in the following manner.
  • the air vent valve 18 is opened and each of the ingredient inlets 11 to 15 are closed.
  • the pipe 5, which is the inlet of the weighing hopper is closed.
  • the combined suction/blower unit is then turned on in suction mode. Once the combined unit is up to speed, the first required inlet 11 is opened and the air inlet 18 closed.
  • the weighing hopper is tared and the first ingredient is then sucked by the combined blower/suction unit through inlet 11 and inlet manifold 10 and flexible connection 19 into the weighing hopper 1 through inlet pipe 5.
  • the weighing hopper monitors the amount of material being fed in. Once the weighing hopper 1 registers that a first set point is reached, change over from fast to slow feed rates is initiated so as to reduce the amount of ingredient being drawn through inlet 11 into the hopper and slow sifting is carried out. Upon the second set point of that ingredient being reached, the vent valve 18 is opened allowing clean air from the air inlet 16 to flow so as to clear any excess ingredient from the manifold 10 into the hopper 1. The weighing hopper then reaches auto in-flight, and the in-flight valve closes, the vent valve 18 remaining open until all residue has been taken into the weighing hopper 1. Full weight is then reached and.
  • vent valve 18 if no more ingredients are required the vent valve 18 is closed. Alternatively, if more ingredients are required then the vent may remain open and monitoring of weight for the next ingredient can then be commenced and the next ingredient inlet 12 is opened. Loading of the weighing hopper 1 continues until all ingredients have been entered in their required quantities.
  • the filter 17 attached to the air inlet 16 ensures that contamination of the ingredients does not occur.
  • Figure 5 shows an alternative embodiment of weigh hopper, dump hopper or mixer hopper.
  • the apparatus of Figure 5 comprises, hopper 1 with inlet 5, combined suction/blower unit 8, outlet 2, three filter elements 20, mounted on a partitioning plate 21, a round baffle 22 and an air blast system shown generally at 23.
  • an improved filtration system which increases air flow through the system and has been found to speed up the system in general.
  • the filters 20 are cylindrical and may be of any given length and diameter, but in a typical arrangement are 125mm in diameter and 450mm long.
  • the filters 20 are blanked off at one end and the other end is connected to the partitioning plate 21 so that air may be sucked or blown through holes in the partitioning plate 21 and ingredients sucked into or blown from the hopper 1, as desired.
  • the filter elements 20 are fitted around cages which attach to the partitioning plate.
  • the baffle 22 is provided spaced from, but surrounding, a peripheral area of the filters within the container so as to prevent ingredients from being pulled directly onto the filters 20 during filling.
  • the partitioning plate is trapped by the hopper body comprising lower body portion 24 and hopper lid 25.
  • the arrangement is, in a preferred embodiment, clamped together with quick release fittings (not shown) .
  • the system operates in generally the same manner as already described, except for the fact that the air blast system 23 which comprises an air receiver 26, valve 27 connecting pipe work 28 and air jets 29, is provided to aid blow down of ingredients during the discharge cycle.
  • the air blast system 23 which comprises an air receiver 26, valve 27 connecting pipe work 28 and air jets 29, is provided to aid blow down of ingredients during the discharge cycle.
  • the air blast system 23 works by providing a low volume high pressure air reservoir within air receiver 26 and then quickly discharging the air from the air receiver 26 through valve 27, pipe work 28 and air jets 29 to create a shock wave effect during the discharge cycle. This has been found very effective in cleaning the filters and improving operation of the system.
  • a combination of air fluidisation and vibration may be utilised to keep ingredients flowing from the holding bins via sifters (not shown) positioned at the outlet of the holding bins, to a manifold arrangement such as manifold 10 of Figure 4, and thereafter to weighing hopper. This is advantageously done by monitoring ingredient flow into the weighing hopper and looking for a change in condition.
  • air may be brought into fluidising boxes of the holding bins for a certain amount of time so as to aid ingredient fluid flow and, if no appreciable increase in flow is detected during this time, the vibrator may be brought on for a number of seconds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un système d'alimentation en ingrédients. Selon un mode de réalisation préféré de la présente invention, une trémie à pesage (1) est équipée d'un aspirateur-souffleur (8), qui est disposé de façon à aspirer une quantité désirée d'un ingrédient à travers un orifice d'entrée, lors du cycle d'admission, et puis à souffler l'ingrédient à travers un orifice de sortie (2) lors d'un cycle d'évacuation. Le système d'alimentation est commandé de manière à permettre l'introduction d'un certain nombre d'ingrédients différents à travers l'orifice d'entrée (5), selon des quantités désirées, le chargeur (1) pouvant être doté d'un moyen de mélange permettant de mélanger les ingrédients avant leur évacuation. Selon un mode de réalisation particulier de l'invention, un système de jet d'air (23) est prévu pour aider à évacuer les ingrédients à travers la sortie (2) lors du cycle d'évacuation et pour souffler tout ingrédient, retenu par les filtres (20), en direction de l'orifice de sortie (2).
PCT/GB1994/002062 1993-09-24 1994-09-22 Dispositif d'alimentation WO1995008500A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76623/94A AU7662394A (en) 1993-09-24 1994-09-22 Feeder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9319718.4 1993-09-24
GB939319718A GB9319718D0 (en) 1993-09-24 1993-09-24 Feeder

Publications (1)

Publication Number Publication Date
WO1995008500A1 true WO1995008500A1 (fr) 1995-03-30

Family

ID=10742464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/002062 WO1995008500A1 (fr) 1993-09-24 1994-09-22 Dispositif d'alimentation

Country Status (3)

Country Link
AU (1) AU7662394A (fr)
GB (1) GB9319718D0 (fr)
WO (1) WO1995008500A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821364A1 (de) * 1998-04-08 1999-10-14 Mann & Hummel Protec Gmbh Vorrichtung zum Fördern von Schüttgütern
ES2155003A1 (es) * 1999-01-07 2001-04-16 Fernandez Gregorio Zornoza Procedimiento de mezcla de productos solidos y maquina para la puesta en practica del mismo.
EP3753877A1 (fr) * 2019-02-27 2020-12-23 Walter Kramer Installation de transport par aspiration pour matériau en vrac, en particulier granulés en matière plastique

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE378880C (de) * 1921-10-04 1923-08-07 Polysius Fa G Verfahren und Vorrichtung zum Foerdern von mehlfoermigen Stoffen mittels Druckluft
US3069205A (en) * 1959-12-03 1962-12-18 Systems Engineering & Mfg Co I Conveying of solids
DE1286958B (de) * 1963-12-19 1969-01-09 Schloz Motor Condensator Vorrichtung zum intermittierenden Foerdern und Abgeben von fliessfaehigen, festen Stoffen, insbesondere pulverfoermigen Stoffen, beispielsweise fuer Kunststoff verarbeitende Maschinen
US3424501A (en) * 1967-07-11 1969-01-28 Henry T Young Conveying system
DE1950055A1 (de) * 1969-10-03 1971-04-15 Moco Industrieanlagen H Scholz Pneumatische Foerderanlage mit Aufgabe des Foerdergutes in ein in der Hauptleitung angeordnetes Druckgefaess
DE2361279A1 (de) * 1973-12-08 1975-06-12 Zimmermann Azo Maschf Pneumatische wiegevorrichtung
DE2437799A1 (de) * 1974-08-06 1976-02-19 Spitzer Silo Fahrzeugwerk Kg Pneumatische foerdervorrichtung fuer staubfoermiges oder koerniges gut mit mindestens einer absaugeinrichtung
US4085975A (en) * 1976-07-29 1978-04-25 Dundee Cement Company Aerating barge unloading system
EP0028086A1 (fr) * 1979-10-29 1981-05-06 Sykes Construction Services Limited Appareil pour le transport de matériau
EP0112937A1 (fr) * 1982-12-31 1984-07-11 Johannes Möller Hamburg GmbH & Co. KG Dispositif pour transporter en particulier des matières en vrac qui s'écoulent dificilement
US4701080A (en) * 1985-03-04 1987-10-20 Cyclonaire Bulk Cargo Systems, Inc. Transfer system for dry flowable material
US5033914A (en) * 1989-09-29 1991-07-23 Cyclonaire Corporation High efficiency feeder apparatus for pneumatic conveying lines

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE378880C (de) * 1921-10-04 1923-08-07 Polysius Fa G Verfahren und Vorrichtung zum Foerdern von mehlfoermigen Stoffen mittels Druckluft
US3069205A (en) * 1959-12-03 1962-12-18 Systems Engineering & Mfg Co I Conveying of solids
DE1286958B (de) * 1963-12-19 1969-01-09 Schloz Motor Condensator Vorrichtung zum intermittierenden Foerdern und Abgeben von fliessfaehigen, festen Stoffen, insbesondere pulverfoermigen Stoffen, beispielsweise fuer Kunststoff verarbeitende Maschinen
US3424501A (en) * 1967-07-11 1969-01-28 Henry T Young Conveying system
DE1950055A1 (de) * 1969-10-03 1971-04-15 Moco Industrieanlagen H Scholz Pneumatische Foerderanlage mit Aufgabe des Foerdergutes in ein in der Hauptleitung angeordnetes Druckgefaess
DE2361279A1 (de) * 1973-12-08 1975-06-12 Zimmermann Azo Maschf Pneumatische wiegevorrichtung
DE2437799A1 (de) * 1974-08-06 1976-02-19 Spitzer Silo Fahrzeugwerk Kg Pneumatische foerdervorrichtung fuer staubfoermiges oder koerniges gut mit mindestens einer absaugeinrichtung
US4085975A (en) * 1976-07-29 1978-04-25 Dundee Cement Company Aerating barge unloading system
EP0028086A1 (fr) * 1979-10-29 1981-05-06 Sykes Construction Services Limited Appareil pour le transport de matériau
EP0112937A1 (fr) * 1982-12-31 1984-07-11 Johannes Möller Hamburg GmbH & Co. KG Dispositif pour transporter en particulier des matières en vrac qui s'écoulent dificilement
US4701080A (en) * 1985-03-04 1987-10-20 Cyclonaire Bulk Cargo Systems, Inc. Transfer system for dry flowable material
US5033914A (en) * 1989-09-29 1991-07-23 Cyclonaire Corporation High efficiency feeder apparatus for pneumatic conveying lines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821364A1 (de) * 1998-04-08 1999-10-14 Mann & Hummel Protec Gmbh Vorrichtung zum Fördern von Schüttgütern
ES2155003A1 (es) * 1999-01-07 2001-04-16 Fernandez Gregorio Zornoza Procedimiento de mezcla de productos solidos y maquina para la puesta en practica del mismo.
EP3753877A1 (fr) * 2019-02-27 2020-12-23 Walter Kramer Installation de transport par aspiration pour matériau en vrac, en particulier granulés en matière plastique

Also Published As

Publication number Publication date
AU7662394A (en) 1995-04-10
GB9319718D0 (en) 1993-11-10

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