EP1704930A2 - Arrangement de grille - Google Patents

Arrangement de grille Download PDF

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Publication number
EP1704930A2
EP1704930A2 EP06251498A EP06251498A EP1704930A2 EP 1704930 A2 EP1704930 A2 EP 1704930A2 EP 06251498 A EP06251498 A EP 06251498A EP 06251498 A EP06251498 A EP 06251498A EP 1704930 A2 EP1704930 A2 EP 1704930A2
Authority
EP
European Patent Office
Prior art keywords
bars
grid arrangement
support structure
side plates
bar
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Withdrawn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
EP06251498A
Other languages
German (de)
English (en)
Other versions
EP1704930A3 (fr
Inventor
Robin Clive Travis
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.)
Renby Ltd
Original Assignee
Renby 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 Renby Ltd filed Critical Renby Ltd
Publication of EP1704930A2 publication Critical patent/EP1704930A2/fr
Publication of EP1704930A3 publication Critical patent/EP1704930A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • 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

Definitions

  • This invention relates to a grid arrangement, and in particular to a grid arrangement for use in the path of conveyance of particulate material.
  • One particular application is in the filling of bags with particulate material using a chute from a hopper containing the material.
  • Grid arrangements are used in the quarry, chemical, food, waste and recycling industries during the conveyance of particulate material for preventing the passage of oversize particles or foreign objects to the destination of the particulate material.
  • Typical materials for which such grid arrangements are used are fluorspar, sand, rubber crumb and the like.
  • Such grid arrangements usually comprise a parallel arrangement of bars disposed across a chute or other form of passageway down or through which the particulate material is passed.
  • a second parallel arrangement of bars disposed at right angles to the first arrangement may be provided such that the two arrangements form a lattice.
  • a wire mesh arrangement may be used. The spacing of the bars or mesh size dictates the size of the particles or objects retained by the grid arrangement.
  • the bars or mesh may be welded or the bars screwed into side plates to form an integral structure that may be removed from the chute or passageway for cleaning purposes.
  • many of the materials for which such grid arrangements are used tend to stick to the bars or mesh, particularly when the materials are damp. This often results in bridging of the bars or mesh by the particulate material, thereby preventing further passage of the material through the bars or mesh. In consequence, frequent cleaning may be required if the passage of the particulate material is to proceed satisfactorily. This is an undesirable task, and can result in considerable downtime of the process equipment.
  • the invention provides a grid arrangement disposed in a passageway for the conveyance of particulate material, comprising a plurality of bars disposed substantially parallel with each other, the bars being mounted in a support structure and extending across the passageway, the bars being free to move relative to the support structure, characterised in that at least some of the bars have disturber members extending upwardly therefrom spaced along their length.
  • the disturber members also extend downwardly from the bars.
  • Each of the bars may have upwardly extending disturber members spaced along its length.
  • the disturber members may be fixedly mounted on the bars, or may be free to rotate on the bars.
  • the disturber members may comprise plates.
  • Each bar may be rotatably mounted in the support structure.
  • the bars may be curved along their length, having a radius of curvature greater than the length of the bars between the support structure. The radius of curvature may be at least six times the length of the bars between the support structure.
  • Each bar may have a bend in the region of one end thereof to form an end region that in use depends from the remainder of the bar. The end region may depend in the direction away from the centre of curvature of the bar.
  • An actuator may be coupled to at least some of the bars to rotate them, preferably to at least alternate bars.
  • Each bar may be reciprocable lengthways of itself in the support structure, and the grid arrangement may comprise actuating means operable to move the bars in a rotary or lengthways reciprocating motion.
  • the actuating means may comprise a pneumatic actuator.
  • the support structure may comprise opposed side plates.
  • the bars may pass through holes in the support structure that are oversize relative to the cross-sectional dimensions of the bars.
  • the support structure may comprise opposed outer side plates through which the bars also pass. The passageway between the side plates and the outer side plates may communicate beneath the bars with the passageway between the side plates.
  • the grid arrangement may comprise a second plurality of bars disposed substantially parallel with each other and beneath and substantially at right angles to the first plurality of bars.
  • the second plurality of bars may be free to move relative to the support structure. At least some of the second plurality of bars may have disturber members extending upwardly therefrom spaced along their length. Each of the second plurality of bars may have upwardly extending disturber members spaced along its length.
  • the disturber members may comprise plates.
  • Each bar of the second plurality of bars may be rotatably mounted in the support structure.
  • Each bar of the second plurality of bars may be reciprocable lengthways of itself in the support structure, and the grid arrangement may comprise second reciprocating means operable to move the bars of the second plurality of bars in a reciprocating motion.
  • the second reciprocating means may comprise a second pneumatic actuator.
  • Each plurality of bars may be supported in respective holes disposed along a line that is substantially parallel with the bars of the other plurality of bars. If the bars are curved, each plurality of bars may be supported in respective holes disposed along a curved line that is substantially parallel with the curved bars of the other plurality of bars.
  • the bars may be disposed to extend horizontally between the support structure. Alternatively, the bars may be inclined. An access opening to the lower end of the bars may be provided in the support structure. Alternatively, the bars may be tapered towards their lower ends.
  • the grid arrangement may comprise separate receptacles for particles passing between the bars at the upper and lower ends thereof. Each bar may have a circular cross-section, or at least between the side plates may have a wedge section.
  • the bars may be of stainless steel.
  • the means to supply the particulate material and/or the destination may be, for example, a bag filled or to be filled with the particulate material or a vehicle for transporting the material from or to another location.
  • a vehicle may be a moving floor lorry, trailer or container, e.g. a Walking Floor (Trade Mark) vehicle.
  • a grid arrangement 11 is installed in the chute 10, which forms a support structure for the grid arrangement 11.
  • the grid arrangement consists of an array of bars 12a, 12b in parallel disposition extending across the chute 10.
  • the bars 12a, 12b extend between side plates 13, which in the embodiment shown are part of the chute 10.
  • the plates 13 may be a separate support structure attached to the walls of the chute 10 if preferred.
  • the bars 12a, 12b are of stainless steel to inhibit rusting and to minimise the tendency of the particulate material to stick to the bars 12a, 12b.
  • the bars 12a, 12b may be of other suitable wear resistant materials, for example corrosion protected mild steel, dependent on the particulate material involved, if preferred.
  • the bars 12a, 12b are of circular cross-section and pass through holes 14 that are oversize relative to the diameter of the bars 12a, 12b so that the bars 12a, 12b are free to move in the plates 13.
  • each bar 12a, 12b is curved along its length, at least along that length extending across the chute 10 between the side plates 13.
  • the radius of curvature is greater than the length of the bars 12a, 12b between the side plates 13, and preferably is about six times that length.
  • each bar 12a has a bend 15 in the region of one end to form an end region 16 that will tend to hang vertically downwards due to its weight.
  • the end region 16 extends in the direction away from the centre of curvature of the bar 12a so that the curvature of the bar 12a and the depending end region 16 create the same disposition restoring effect to the bar 12a.
  • the bars 12a may be readily agitated by hand using the free end region as a "handle". Reciprocation of the bars 12b to dislodge particularly sticky material is effected by an actuator 30, preferably a pneumatic actuator, acting on an actuating rod 18 coupled to the ends of bars 12b.
  • the actuator 30 may be a motor or an electrical, pneumatic or hydraulic actuator.
  • At least some of the bars 12, in this case alternate bars 12b, have upwardly extending disturber members 31 spaced along their length. If preferred, each bar 12a, 12b may have the disturber members 31 spaced along its length.
  • Each disturber member 31 comprises a plate secured, for example by welding, to the bar 12b, and serves to disturb, due to the movement of the bars 12b, any sticky particulate material that has coagulated above the bars 12a, 12b.
  • the disturber members 31 may be free to rotate on the bars 12.
  • the reciprocating movement of the bars 12b and the disturber plates 31 increase the tendency for fine particulate material to penetrate the holes 14 to the outside of the support plates 13.
  • the support structure is provided with outer side plates 32 through which the bars 12 also pass.
  • the passageway 33 formed between the side plates 13 and the outer side plates 32 communicates beneath the bars 12 with the passageway 34 between the side plates 13 to form a single passageway 28 in the lower part of the chute 10. This ensures that any particulate material that passes through the holes 14 passes to the correct destination down the chute 10.
  • the end regions 16 of bars 12a depend in this region 33 so that any particulate material passing through the holes 14 onto the end regions 16 cannot pass through the outer side plates 32.
  • all of the bars 12 may have the form of bars 12b described above, with disturber plates 31 attached thereto so that a substantially complete lattice formation is formed when looked in plan view (see Fig. 7). With this arrangement, all of the bars 12 are reciprocated by the actuator 30.
  • FIG. 3 and 4 there is shown an alternative grid arrangement 19. Many of the parts shown in Figs. 3 and 4 are identical with the corresponding parts of the grid arrangement 11 and are identified by the same reference numerals.
  • this second embodiment there is provided a second array of bars 20 that extend parallel with each other across the chute 10 at right angles to the bars 12. This provides a mesh type of arrangement of the bars 12, 20 when viewed in under plan as in Fig. 4. To maintain a substantially constant spacing between the bars 20 and the bars 12, the centres of the holes 21 in side plates 22 in which the bars 20 are supported lie on a line that is curved to the same curvature as that of the bars 12.
  • both the upper bars 12 and the lower bars 20 have the upwardly extending disturber plates 31 spaced therealong.
  • only the upper bars 12 may have the disturber plates 31 if desired.
  • Outer side plates 35 through which the bars 20 also pass are provided, particularly if, as shown, lower bars 20 have disturber plates 31 thereon.
  • the bars 12 may lie in an inclined plane as shown in Fig 6.
  • the bars 12 are shown fitted with an alternative form of disturber plate 31, which also extends downwardly from the bars 12 thereby providing a weighted lower part to increase the tendency for the bars 12 to return to the undisturbed position after any disturbance therefrom.
  • oversize particles may roll or slide to the lower bars 12.
  • These oversize particles may then be removed through an access opening 25 to one side of the chute 10.
  • Particle size or product separation may also be achieved by an arrangement as shown in Fig. 7.
  • the bars 26 are tapered towards their lower ends so that the gap between them increases towards their lower ends.
  • the bars 12, 20, 26 may be of non-circular cross-section, at least in the part extending across the chute 10, such as the wedge shape of the bar 23 shown in Fig. 5. Such a section will have an enhanced effect of breaking coagulated or oversize particles and any particles adhering to the sides 24 of the bar 23 will cause rotation to the bar 23 to inhibit bridging of the material to an adjacent bar 23.
  • Other sections of bar 12, 20, 23, 26 such as elliptical or polygonal may be used if preferred.
  • the shape of the disturber plate 31 may be rectangular, elliptical or any other suitable shape, as desired.
  • Individual bars 12, 20, 23, 26 may be readily removed from the chute 10 if necessary for cleaning or replacement when worn, thereby avoiding the need to open the chute 10 or remove and possibly replace the entire grid arrangement 11, 19.
  • cleaning which is required less frequently with the grid arrangement 11 or 19, due to its self-cleaning effect, than was the case with prior known grid arrangements, is less onerous and involves less downtime than was previously the case.
  • replacement of a single bar 12, 20, 23, 26 if worn or damaged is less costly than replacement of an entire grid arrangement of previously known type.
  • the grid arrangements 11, 19 are shown at a location below the top of the chute 10. However, in appropriate circumstances, the grid arrangement may be disposed at either the top or the bottom of the chute or on top of a receiving hopper or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Pusher Or Impeller Conveyors (AREA)
EP06251498A 2005-03-24 2006-03-21 Arrangement de grille Withdrawn EP1704930A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0506068A GB0506068D0 (en) 2005-03-24 2005-03-24 Grid arrangement

Publications (2)

Publication Number Publication Date
EP1704930A2 true EP1704930A2 (fr) 2006-09-27
EP1704930A3 EP1704930A3 (fr) 2007-11-14

Family

ID=34566441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06251498A Withdrawn EP1704930A3 (fr) 2005-03-24 2006-03-21 Arrangement de grille

Country Status (2)

Country Link
EP (1) EP1704930A3 (fr)
GB (1) GB0506068D0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011003599A1 (fr) * 2009-07-07 2011-01-13 Dieffenbacher Gmbh + Co. Kg Procédé de nettoyage d'un élément de résistance au flux dans une machine de dispersion et dispositif pour nettoyer un élément de résistance au flux
WO2020098688A1 (fr) * 2018-11-14 2020-05-22 王光领 Dispositif de poussée de gangue sur système d'évacuation de gangue pour système de préparation de charbon de sable séché à l'air
CN112264293A (zh) * 2020-09-29 2021-01-26 杭州律延化妆品有限公司 一种用于化妆品加工的过筛装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH116294A (de) * 1925-06-02 1926-08-16 Emil Gubler Mechanisches Rüttelwerk zum Sieben und Sortieren von erdigen Massen.
US2367785A (en) * 1940-11-20 1945-01-23 Kutil Engineering Company Jarring screen
DE935481C (de) * 1953-07-31 1955-11-24 Siteg Siebtech Gmbh Schwingsiebboden
US5740950A (en) * 1996-01-11 1998-04-21 The Sandbagger Corporation Apparatus and agitator for dispensing fluent material into containers
GB2379433A (en) * 2001-07-23 2003-03-12 Renby Ltd Self-cleaning grid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH116294A (de) * 1925-06-02 1926-08-16 Emil Gubler Mechanisches Rüttelwerk zum Sieben und Sortieren von erdigen Massen.
US2367785A (en) * 1940-11-20 1945-01-23 Kutil Engineering Company Jarring screen
DE935481C (de) * 1953-07-31 1955-11-24 Siteg Siebtech Gmbh Schwingsiebboden
US5740950A (en) * 1996-01-11 1998-04-21 The Sandbagger Corporation Apparatus and agitator for dispensing fluent material into containers
GB2379433A (en) * 2001-07-23 2003-03-12 Renby Ltd Self-cleaning grid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011003599A1 (fr) * 2009-07-07 2011-01-13 Dieffenbacher Gmbh + Co. Kg Procédé de nettoyage d'un élément de résistance au flux dans une machine de dispersion et dispositif pour nettoyer un élément de résistance au flux
WO2020098688A1 (fr) * 2018-11-14 2020-05-22 王光领 Dispositif de poussée de gangue sur système d'évacuation de gangue pour système de préparation de charbon de sable séché à l'air
CN112264293A (zh) * 2020-09-29 2021-01-26 杭州律延化妆品有限公司 一种用于化妆品加工的过筛装置
CN112264293B (zh) * 2020-09-29 2021-12-07 浙江正鑫齿轮有限公司 一种用于化妆品加工的过筛装置

Also Published As

Publication number Publication date
EP1704930A3 (fr) 2007-11-14
GB0506068D0 (en) 2005-05-04

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