GB2371251A - Screening deck - Google Patents

Screening deck Download PDF

Info

Publication number
GB2371251A
GB2371251A GB0025220A GB0025220A GB2371251A GB 2371251 A GB2371251 A GB 2371251A GB 0025220 A GB0025220 A GB 0025220A GB 0025220 A GB0025220 A GB 0025220A GB 2371251 A GB2371251 A GB 2371251A
Authority
GB
United Kingdom
Prior art keywords
deck
structural members
material flow
particles
transverse
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Withdrawn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
GB0025220A
Other versions
GB0025220D0 (en
Inventor
Richard John Munday
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.)
VIPOWER TECHNOLOGIES Ltd
Original Assignee
VIPOWER TECHNOLOGIES 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 VIPOWER TECHNOLOGIES Ltd filed Critical VIPOWER TECHNOLOGIES Ltd
Priority to GB0025220A priority Critical patent/GB2371251A/en
Publication of GB0025220D0 publication Critical patent/GB0025220D0/en
Publication of GB2371251A publication Critical patent/GB2371251A/en
Withdrawn legal-status Critical Current

Links

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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • 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

Landscapes

  • Developing Agents For Electrophotography (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

A screening deck B for separating material comprising different sized particles, comprises a plurality of transverse structural members C arranged transverse to the direction A of material flow on the deck and a plurality of longitudinal structural members D arranged substantially in alignment with the direction A material flow on the deck. The transverse and longitudinal members C,D define a plurality of deck apertures, characterised in that:- <UL ST=" Ò "> <LI> the deck apertures increase in their lateral dimension in the direction A of material flow in order to allow the release of near size particles, <LI>at least the upper region of the lateral structural members C are upwardly inclined in the direction A of material flow to assist trapped near size particles larger than the aperture to be released from the aperture, <LI>a portion of alternate longitudinal structural members D protrude above the level of the screen deck with increasing height in the direction A of material flow causing larger particles to be pitched and rolled allowing smaller particles sifting atop of them to be liberated, and the protrusions direct smaller particles towards the aperture. </UL>

Description

DESCRIPTION.
TITLE : AN IMPROVED SCREENING DECK.
This invention relates to a screening deck, which separates items larger and smaller than the screening deck aperture for use with vibratory machines.
Screening decks exist which are constructed of woven metal or synthetic materials to create a mesh, or from formed metal pieces.
Problems arising from the aforementioned are that * the apertures are plugged or blinded by particles that are near to the size of the aperture,
* in some cases smaller sized particles cannot be presented to the aperture because they sit atop larger particles and are unable to reach the aperture, * heavy particles require so much structural strength to be inherent in the screen deck that the relative percentage of open area is severely restricted.
The objective of this invention is to provide a screening deck which * minimises plugging and blinding, 'agitates the mixture of particles sufficiently to allow the maximum number of smaller particles to be presented to, and be allowed to pass through, the aperture, * maximises percentage of open area without compromising structural strength.
Fig. 1. demonstrates where mixed particles conveyed on vibratory conveying medium in direction of flow A. are being allowed to come into contact with the screening deck B.
The deck apertures increase in their lateral dimension in the direction of product flow in order to allow the release of near size particles, the lateral structural members C. are sloped to assist trapped near size particles larger than the aperture to be released from the aperture.
The longitudinal structural members D. protrude through the screen deck B. with increasing height in the direction of product flow causing larger particles to be pitched and rolled allowing smaller particles sitting atop of them to be liberated, and the protrusions direct smaller particles towards the aperture.
The lateral and longitudinal members (C & D) give vertical strength and stiffness to the deck thus maximising the relative percentage of open area to the overall area of the screen deck.

Claims (2)

  1. CLAIMS 1. A screening deck for separating material comprising different sized particles, said deck comprising a plurality of lateral or transverse structural members arranged transverse to the normal direction of flow or movement of material on the deck and a plurality of longitudinal structural members arranged substantially in alignment with the normal direction of flow or movement of material on the deck, said transverse and longitudinal members defining a plurality of deck apertures, characterised in that: 'said deck apertures increase in their lateral dimension in the normal direction of material flow, . at least the upper region of the lateral structural members are upwardly inclined in the normal direction of material flow, 'at at least a portion of at least some of the longitudinal structural members extend above the level of the screen deck with increasing height in the normal direction of material flow.
  2. 2. A screening deck substantially as herein described with reference to the accompany drawings.
GB0025220A 2000-10-14 2000-10-14 Screening deck Withdrawn GB2371251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0025220A GB2371251A (en) 2000-10-14 2000-10-14 Screening deck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0025220A GB2371251A (en) 2000-10-14 2000-10-14 Screening deck

Publications (2)

Publication Number Publication Date
GB0025220D0 GB0025220D0 (en) 2000-11-29
GB2371251A true GB2371251A (en) 2002-07-24

Family

ID=9901291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0025220A Withdrawn GB2371251A (en) 2000-10-14 2000-10-14 Screening deck

Country Status (1)

Country Link
GB (1) GB2371251A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2412451A1 (en) * 2010-07-29 2012-02-01 IFE Aufbereitungstechnik Gmbh Filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2412451A1 (en) * 2010-07-29 2012-02-01 IFE Aufbereitungstechnik Gmbh Filter

Also Published As

Publication number Publication date
GB0025220D0 (en) 2000-11-29

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)