EP0224621A1 - Vanne de réglage pour matériaux en vrac - Google Patents

Vanne de réglage pour matériaux en vrac Download PDF

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Publication number
EP0224621A1
EP0224621A1 EP85308409A EP85308409A EP0224621A1 EP 0224621 A1 EP0224621 A1 EP 0224621A1 EP 85308409 A EP85308409 A EP 85308409A EP 85308409 A EP85308409 A EP 85308409A EP 0224621 A1 EP0224621 A1 EP 0224621A1
Authority
EP
European Patent Office
Prior art keywords
boundary surface
flow path
pressure
valve
powder flow
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Withdrawn
Application number
EP85308409A
Other languages
German (de)
English (en)
Inventor
Philip John Lloyd
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.)
Portals Engineering Ltd
Original Assignee
Portals Engineering Ltd
Loughborough Consultants 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
Priority to GB08412802A priority Critical patent/GB2158813B/en
Application filed by Portals Engineering Ltd, Loughborough Consultants Ltd filed Critical Portals Engineering Ltd
Priority to EP85308409A priority patent/EP0224621A1/fr
Publication of EP0224621A1 publication Critical patent/EP0224621A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/72—Fluidising devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/54—Gates or closures

Definitions

  • This invention relates to a powder flow control valve and to a method of controlling powder flow.
  • powder refers to materials made up of discrete particles. As will be clear from the description below the term includes a relatively fine powder such as flour and also a granu­lar material such as granulated salt (5 mm maximum particle dimension) or agglomerated coffee powder (3 mm maximum particle dimension).
  • a container When a container is to be filled with a powder, it may be desirable to measure the weight of powder accurately. For example in the food industry it may be necessary to fill a container with a measured weight of powder such as coffee or milk powder. It is desirable that the measurement of the weight of powder should be as accurate as possible since a minimum quantity of powder must be provided in the container but once that minimum weight is reached any extra powder in the container is wasted.
  • valve that can operate reliably over a pro­longed period and that is not too difficult to maintain and in particular clean.
  • the valve may also have to be sterilisable.
  • a powder flow control valve in which a powder flow path is surrounded by a perforated boundary surface and means are provided for creating a drop in pressure across the boundary surface with the higher pressure on the powder flow path side of the boundary surface.
  • the means for creating a drop in pressure across the boundary surface preferably operates by reducing the pressure on the opposite side of the boundary surface to the powder flow path without reducing (or without reduc­ing so much) the pressure along the powder flow path.
  • it could operate by increasing the pressure along the powder flow path with­out increasing (or without increasing so much) the pressure on the opposite side of the boundary surface.
  • the cross-sectional area of the flow path sur­rounded by the perforated boundary surface preferably decreases in the downstream direction.
  • the boundary surface has rotational symmetry and preferably includes a substantially frusto-conical portion with the smaller diameter portion downstream of the large diameter portion.
  • the portion of the powder flow path surrounded by the perforated boundary surface is advantageously sub­stantially vertical.
  • valve may be used to control the flow of a wide variety of powders including, for example, flour, powdered milk, agglomerated coffee powder and granulated salt.
  • the perforated boundary surface may be made of a porous material, for example sintered metal powder, glass or a plastics material, or may be made by a compo­nent with apertures formed therein at a multiplicity of predetermined locations. In the latter case the locations are preferably evenly distributed around the boundary surface.
  • means for creating a pressure drop across the boundary surface with the higher pressure on the powder flow path side of the boundary surface may be provided for creating a pressure rise across the boundary surface with the lower pressure on the powder flow path side of the boundary surface.
  • a method of controlling the flow of a powder in which a portion of the path along which powder flows is surrounded by a perforated boundary surface and powder flow is stopped by creating a drop in pressure across the boundary surface with the higher pressure on the powder flow path side of the boundary surface.
  • the control valve 1 is sited at the bottom of a shaft 2 of circular cross-section and includes a frusto-­conical part 3 made of porous plastics material which in this particular example is that sold by Porvair Ltd. under the trademark VYON. Immediately below the frusto-conical part 3 is a cylindrical part 4 leading to an outlet 5 of the valve. A plenum chamber 6 is defined between the outside of the frusto-conical part 3 and the walls of the shaft 2. The plenum chamber 6 is connected to a pumping system when can be arranged to suck air out of, or force air into, the chamber 6.
  • the pumping system comprises a duct 11 which is connected, on the one hand, via a duct 7 and a valve 8 to a reservoir 9 of low pressure air maintained at low pressure by a pump 10 and, on the other hand, via a duct 12 and a valve 13 to a compressed air cylinder 14.
  • the valve 1 can therefore be used very effec­tively to control powder flow.
  • the shaft 2 had an internal diameter d of 60 mm
  • the frusto-conical part 3 had a height h of 42 mm and a minimum internal diameter d2 of 15 mm.
  • the inclination ⁇ of the frusto-conical boundary surface to the horizontal was 60°.
  • the powder used was agglomerated coffee which when subjected to a sieve analysis gave the results shown in the table below:
  • the porous material defining the boundary surface had a mean pore size of 70 microns and a thickness of 4.75 mm. The thickness is not however believed to be particularly significant.
  • the porous material allowed a flow of air of 3.5 cm3/m2/min at a pressure of 3 kN/m2.
  • the pressure in the plenum chamber 6 was 15" Hg (about 51 kN/m2) be­low atmospheric pressure and there was an air flow rate of 48 litres per minute (at atmospheric pressure).
  • the pressure in the plenum chamber was 6 psi (about 41 kN/m2) above atmospheric pressure and there was an air flow rate of 47 litres per minute (at atmospheric pressure).
  • valve was also tested with powdered milk and proved entirely satisfactory. Nonetheless it should be understood that the dimensions of the valve may need to be altered for different powders and in particular the dimensions d2 may need to be varied. It is also possible to omit the cylindrical part 4 at the outlet of the valve without affecting the operation of the valve.
  • boundary surface is frusto-conical
  • other shapes of boundary surface could be employed.
  • a surface of inverted pyramid shape could be used, or even a cylindrical shape.
  • valve has been described almost exclusively in relation to controlling the flow of food powders it will be understood that applications of the valve may also be found outside the food industry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
EP85308409A 1984-05-18 1985-11-19 Vanne de réglage pour matériaux en vrac Withdrawn EP0224621A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08412802A GB2158813B (en) 1984-05-18 1984-05-18 Powder flow control valve
EP85308409A EP0224621A1 (fr) 1985-11-19 1985-11-19 Vanne de réglage pour matériaux en vrac

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85308409A EP0224621A1 (fr) 1985-11-19 1985-11-19 Vanne de réglage pour matériaux en vrac

Publications (1)

Publication Number Publication Date
EP0224621A1 true EP0224621A1 (fr) 1987-06-10

Family

ID=8194442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85308409A Withdrawn EP0224621A1 (fr) 1984-05-18 1985-11-19 Vanne de réglage pour matériaux en vrac

Country Status (1)

Country Link
EP (1) EP0224621A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318247A1 (fr) * 1987-11-23 1989-05-31 G.E.I. Filling, Capping And Labelling Limited Vannes de réglage pour matériaux en vrac
WO1991017940A1 (fr) * 1989-05-09 1991-11-28 Carl Edelmann Gmbh Doseur a vis sans fin
US5405647A (en) * 1993-11-02 1995-04-11 Owens-Corning Fiberglass Technology Inc. Method for applying granules to a moving coated asphalt sheet to form areas having sharp leading and trailing edges
US5520889A (en) * 1993-11-02 1996-05-28 Owens-Corning Fiberglas Technology, Inc. Method for controlling the discharge of granules from a nozzle onto a coated sheet
US5599581A (en) * 1993-11-02 1997-02-04 Owens Corning Fiberglas Technology, Inc. Method for pneumatically controlling discharge of particulate material
US5624522A (en) * 1995-06-07 1997-04-29 Owens-Corning Fiberglas Technology Inc. Method for applying granules to strip asphaltic roofing material to form variegated shingles
US5747105A (en) 1996-04-30 1998-05-05 Owens Corning Fiberglas Technology Inc. Traversing nozzle for applying granules to an asphalt coated sheet
US5746830A (en) * 1993-11-02 1998-05-05 Owens-Corning Fiberglas Technology, Inc. Pneumatic granule blender for asphalt shingles
WO1999041148A1 (fr) * 1998-02-11 1999-08-19 Robert Bosch Gmbh Dispositif de dosage pour produits en vrac aptes a l'ecoulement
WO2010149133A1 (fr) * 2009-06-22 2010-12-29 Voxeljet Technology Gmbh Procédé et dispositif de commutation d'un courant de matière particulaire lors de la construction couche par couche de maquettes
US8956140B2 (en) 2010-07-13 2015-02-17 Voxeljet Ag Apparatus for producing three-dimensional models by means of a layer build up technique
US9242413B2 (en) 2011-01-05 2016-01-26 Voxeljet Ag Device and method for constructing a laminar body comprising at least one position adjustable body defining the working area
US10442170B2 (en) 2013-12-20 2019-10-15 Voxeljet Ag Device, special paper, and method for producing shaped articles
IT201900003497A1 (it) * 2019-03-11 2020-09-11 System Ceramics S P A Dispositivo erogatore per polveri
WO2022097027A1 (fr) * 2020-11-06 2022-05-12 System Ceramics S.P.A. Dispositif de distribution pour matériaux granuleux et/ou pulvérulents

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB422699A (en) * 1933-06-13 1935-01-14 Int Cigar Mach Co Mechanism for removing dust and the like from tobacco and other materials
US3305276A (en) * 1965-04-08 1967-02-21 Buehler Ag Geb Silo construction
US4067623A (en) * 1974-04-02 1978-01-10 Polysius Ag Pneumatic pressure conveyor for fine material
EP0125585A1 (fr) * 1983-05-11 1984-11-21 Erkomat Oy Equipement pour enlever l'air des matières pulvérulentes
GB2158813A (en) * 1984-05-18 1985-11-20 Loughborough Consult Ltd Powder flow control valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB422699A (en) * 1933-06-13 1935-01-14 Int Cigar Mach Co Mechanism for removing dust and the like from tobacco and other materials
US3305276A (en) * 1965-04-08 1967-02-21 Buehler Ag Geb Silo construction
US4067623A (en) * 1974-04-02 1978-01-10 Polysius Ag Pneumatic pressure conveyor for fine material
EP0125585A1 (fr) * 1983-05-11 1984-11-21 Erkomat Oy Equipement pour enlever l'air des matières pulvérulentes
GB2158813A (en) * 1984-05-18 1985-11-20 Loughborough Consult Ltd Powder flow control valve

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318247A1 (fr) * 1987-11-23 1989-05-31 G.E.I. Filling, Capping And Labelling Limited Vannes de réglage pour matériaux en vrac
GB2212790A (en) * 1987-11-23 1989-08-02 Portals Eng Ltd Improvements in or relating to flow control valves
US4974646A (en) * 1987-11-23 1990-12-04 Portals Engineering Limited Powder flow control valve
GB2212790B (en) * 1987-11-23 1992-01-08 Portals Eng Ltd Improvements in or relating to powder flow control valves
WO1991017940A1 (fr) * 1989-05-09 1991-11-28 Carl Edelmann Gmbh Doseur a vis sans fin
US5520889A (en) * 1993-11-02 1996-05-28 Owens-Corning Fiberglas Technology, Inc. Method for controlling the discharge of granules from a nozzle onto a coated sheet
US5599581A (en) * 1993-11-02 1997-02-04 Owens Corning Fiberglas Technology, Inc. Method for pneumatically controlling discharge of particulate material
US5746830A (en) * 1993-11-02 1998-05-05 Owens-Corning Fiberglas Technology, Inc. Pneumatic granule blender for asphalt shingles
US5405647A (en) * 1993-11-02 1995-04-11 Owens-Corning Fiberglass Technology Inc. Method for applying granules to a moving coated asphalt sheet to form areas having sharp leading and trailing edges
US5624522A (en) * 1995-06-07 1997-04-29 Owens-Corning Fiberglas Technology Inc. Method for applying granules to strip asphaltic roofing material to form variegated shingles
US5747105A (en) 1996-04-30 1998-05-05 Owens Corning Fiberglas Technology Inc. Traversing nozzle for applying granules to an asphalt coated sheet
WO1999041148A1 (fr) * 1998-02-11 1999-08-19 Robert Bosch Gmbh Dispositif de dosage pour produits en vrac aptes a l'ecoulement
US9174392B2 (en) 2009-06-22 2015-11-03 Voxeljet Ag Method and device for switching a particulate material flow in the construction of models in layers
WO2010149133A1 (fr) * 2009-06-22 2010-12-29 Voxeljet Technology Gmbh Procédé et dispositif de commutation d'un courant de matière particulaire lors de la construction couche par couche de maquettes
US9931762B2 (en) 2009-06-22 2018-04-03 Voxeljet Ag Method and device for switching a particulate material flow in the construction of models in layers
US9149987B2 (en) 2010-07-13 2015-10-06 Voxeljet Ag Device for producing three-dimensional models by a layering technique
US8956140B2 (en) 2010-07-13 2015-02-17 Voxeljet Ag Apparatus for producing three-dimensional models by means of a layer build up technique
US9242413B2 (en) 2011-01-05 2016-01-26 Voxeljet Ag Device and method for constructing a laminar body comprising at least one position adjustable body defining the working area
US9649812B2 (en) 2011-01-05 2017-05-16 Voxeljet Ag Device and method for constructing a laminar body comprising at least one position-adjustable body defining the working area
US10513105B2 (en) 2011-01-05 2019-12-24 Voxeljet Ag Device and method for constructing a layer body
US10946636B2 (en) 2011-01-05 2021-03-16 Voxeljet Ag Device and method for constructing a layer body
US11407216B2 (en) 2011-01-05 2022-08-09 Voxeljet Ag Device and method for constructing a layer body
US10442170B2 (en) 2013-12-20 2019-10-15 Voxeljet Ag Device, special paper, and method for producing shaped articles
US10889055B2 (en) 2013-12-20 2021-01-12 Voxeljet Ag Device, special paper, and method for producing shaped articles
IT201900003497A1 (it) * 2019-03-11 2020-09-11 System Ceramics S P A Dispositivo erogatore per polveri
WO2020183353A1 (fr) * 2019-03-11 2020-09-17 System Ceramics S.P.A. Dispositif de distribution pour matières pulvérulentes
EP3938687A1 (fr) * 2019-03-11 2022-01-19 System Ceramics S.p.A. Dispositif de distribution pour matières pulvérulentes
WO2022097027A1 (fr) * 2020-11-06 2022-05-12 System Ceramics S.P.A. Dispositif de distribution pour matériaux granuleux et/ou pulvérulents

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Inventor name: LLOYD, PHILIP JOHN