WO2023147607A1 - Crible vibrant à triple étage et procédé d'utilisation d'un crible vibrant à triple étage - Google Patents

Crible vibrant à triple étage et procédé d'utilisation d'un crible vibrant à triple étage Download PDF

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Publication number
WO2023147607A1
WO2023147607A1 PCT/ZA2023/050005 ZA2023050005W WO2023147607A1 WO 2023147607 A1 WO2023147607 A1 WO 2023147607A1 ZA 2023050005 W ZA2023050005 W ZA 2023050005W WO 2023147607 A1 WO2023147607 A1 WO 2023147607A1
Authority
WO
WIPO (PCT)
Prior art keywords
deck
vibratory screen
apertures
pipes
screen
Prior art date
Application number
PCT/ZA2023/050005
Other languages
English (en)
Inventor
Timothy John MUNTON
Original Assignee
Munton Timothy John
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 Munton Timothy John filed Critical Munton Timothy John
Publication of WO2023147607A1 publication Critical patent/WO2023147607A1/fr

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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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/16—Feed or discharge arrangements
    • 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
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • This invention relates to the use of a vibratory screen arrangement to separate a particulate stream into two streams having two particle size ranges.
  • Vibratory screens are used to separate products into different sizes. For example, a single deck screen splits products into 2 sizes and a double-deck screen splits products into 3 different sizes and 3 deck screen splits products into 4 different sizes.
  • the invention provides a triple deck vibratory screen configured with a top and a bottom screening deck each having screening panels with apertures of the same aperture area, and a middle deck as a conveying deck on the triple deck vibratory screen to increase it’s screening area.
  • the conveying deck may be blanked i.e. apertureless over its extent so that screened material cannot pass therethrough
  • This Invention further provides a triple deck vibratory screen and a method of operation so that it functions as a large single deck screen.
  • the invention thus provides a method for use of a 3-deck vibratory screen to perform the same duty as a much larger single-deck vibratory screen, said method including splitting feed material into two streams of feed material which
  • the method may include providing apertures in every second panel in the last row of blank panels of the middle carrier deck in register with apertures in the bottom deck.
  • the apertures may all be identical sized apertures.
  • the method may include having adjacent identical sized apertures of reduced diameter in the last row of panels of both the middle and the bottom deck which are in register, the apertures being of reduced diameter when compared with an embodiment in which the apertures are every second panel.
  • pipes of complementary diameter to the apertures in the end of the middle and bottom decks may be fitted to pass through both decks. These pipes may be positioned such that they are flush with the top of the middle deck and protrude through the bottom deck. The diameters of these pipes may be such that they fit snugly into the two rows of deck apertures and may be clamped firmly in position.
  • the middle deck and bottom deck may have alternating apertures in flow communication with the pipes that permit flow of material from the middle deck and through the bottom deck, and blank areas between the apertures.
  • the blank zones and the apertures may be of approximately the same diameter so that the pipes are equally spaced apart.
  • the middle deck and bottom deck may have a plurality of reduced diameter adjacent apertures in each panel in flow communication with the pipes that permit flow of material from the middle deck and through the bottom deck. The total area of these reduced diameter apertures, and thus the closely adjacent pipes, may be of approximately equal in area to that of the larger diameter pipes of the first embodiment.
  • the pipe diameter of each pipe has approximately double the cross section area of the pipes in the second embodiment where the reduced diameter pipes are closely adjacent so that the overall flow area between the middle and out of the bottom deck are similar in both embodiments.
  • the number of apertures and thus pipes between the middle deck and the bottom deck may be selected with respect to the materials being separated, however, for every aperture in the middle deck there is a corresponding pipe through the bottom deck.
  • the triple deck vibratory screen is actuated by a drive or plurality of drives to vibrate the decks and attached screening panels, including any cross members and side plates.
  • a plurality of drives actuates oniy the decks and attached screening paneis to vibrate oniy separateiy from the remainder thereof and not the side piates.
  • Figure 1 shows a cut-away side view illustrating the flow of material across the 3 decks
  • FIGS 2 and 3 show 3D views of the feed box and the method of splitting the feed material into two equal streams
  • Figure 4 shows one embodiment with a middle deck and bottom deck having alternating apertures in flow communication with pipes that permit flow of material from the middle deck and through the bottom deck, and blank areas between the apertures;
  • Figure 5 shows an arrangement whereby oversize material from the top deck discharges over the end of this deck and joins the identical oversize material from the bottom deck and this oversized material flows down deck and discharges through gaps on the end of deck between the pipes (the material as such is not shown so as not to clutter the drawing); and
  • Figure 6 shows another embodiment with a middle deck and bottom deck having a plurality of adjacent apertures in flow communication with the pipes that permit flow of material from the middle deck and through the bottom deck.
  • the feed material (2) is first split into two equal streams (4) and (5) by means of apertures (18) in the feed box (32).
  • apertures (18) can be changed in position and aperture diameter until an equal feed split to both decks (6) and (10) is achieved.
  • the feed box (32) (See Fig 2 for more detail) consists of but not limited to three rows of panels. There is typically one row of bottom blank panels (38) and two rows of mixed blank panels (38) and blank panels with apertures (18). The remaining panels on the top and bottom decks have screening apertures typically of 0.5 mm to 12 mm.
  • the usual function of a feed box (32) is to cushion the impact of the falling material (2) onto the screen before traveling down the top screening deck.
  • the feed box is used for an additional purpose, that is to split the feed (2) into two equal streams by means apertures (18) in some of the panels as shown in Fig 3.
  • the middle deck (8) which is a solid conveying deck in which the panels are blank and not apertured like those of the top and bottom deck, conveys fine materials i.e. fines to the end of the deck and down the pipes.
  • apertures are sized and positioned such that the feed (2) is split into equal streams of feed (4) and (5) of Fig 1.
  • the screening decks (6) and (10) are both fitted with the same aperture screening panels in order to separate the feed material into the same fractions of oversize and undersize products.
  • the one split stream (4) flows normally along the top deck (6) and discharges off the end of the top deck (6).
  • the fine screened undersize material (22) from under the top deck (6) is screened through the top deck and onto the conveying middle deck (8).
  • the oversize material (4) from the top deck (6) discharges over the end of this deck (6) and joins the identical oversize material (5) from the bottom deck (10)
  • This oversized material flows down deck (10) and discharges through gaps (40) on the end of deck (10) between the pipes (26) (See Fig 4 and 6).
  • the pipes 26 are of around 300 mm diameter while in Figure 6 the pipes are of a reduced diameter of around 180 mm and the gaps between the pipes are larger than that in Fig 4 so that the screened oversize material can pas between them.
  • the undersized material (22) from under the top deck (6) flows down the solid conveying deck (8) and wells up against the blank off plate (24). It then flows down pipes (26) into the hopper (28) below and joins up with the undersize material (30) from under the bottom deck (10).
  • products (22) and (30) are exactly the same undersize material joined up as one product in the hopper (28) below.
  • Figure 5 shows an end blanked off section (24) of the middle deck and the pipe arrangement. These pipes carry the screened material from the top deck through the middle and bottom decks and into the hopper below. In Fig 6 there are more apertures and pipes but these are of a smaller diameter than those shown in Fig 4. Furthermore, in Fig 6, the apertures and pipes 26 are adjacent while in Fig 4, the pipes 26 are of a larger diameter and spaced alternatively on every second panel. Without limiting the scope of the invention, the embodiments below describe potential working options of the invention.
  • Embodiment 1) Method of splitting the feed of material (2) onto a vibratory screen into two nearly equal streams using openings in the feed box wear panels (18) and (38).
  • Embodiment 2) Method using the middle deck (8) of a 3-deck screen as a carrier deck to convey the screened material from the top deck (6) to the end of this carrier deck using solid blank panels instead of the usual screening panels with apertures
  • Embodiment 3 Method of closing off the discharge end (24) of this carrier middle deck. This allows the screened material (22) to flow down the large open pipes (26) evenly distributed at the end of this deck, or as in embodiment 2, to flow down the greater number of smaller pipes in every panel at end of this deck.
  • Embodiment 4 Method of using these pipes (26) to pass through both the middle deck (8) and bottom deck (10) so as to discharge the undersize material (22) from below the top deck (6) into the hopper (28) below the screen.
  • Embodiment S Method of using gaps (40) between the pipes (26) on the discharge end of the bottom deck (10).
  • Vibratory screens are 3 dimensional machines and size and mass increase exponentially with increase in screen area size.
  • the inventor believes that the invention as illustrated has a financial advantage in the costs of the screen and the structure to support it. Moreover, there are additional savings in crane and transport costs.

Abstract

L'invention concerne un crible vibrant à triple étage configuré avec un étage de criblage supérieur (6) et un étage de criblage inférieur (10) ayant les mêmes panneaux de criblage à ouvertures, et un étage intermédiaire (8) en tant qu'étage de transport sur le crible vibrant à triple étage pour accroître sa surface de criblage. Les étages de criblage (6) et (10) sont tous deux équipés des mêmes panneaux de criblage à ouvertures afin de séparer le matériau d'alimentation en les mêmes fractions de produits surdimensionnés et sous-dimensionnés. Le flux divisé (4) s'écoule normalement le long de l'étage supérieur (6) et se décharge sur l'extrémité de l'étage supérieur (6). Le matériau sous-dimensionné criblé fin (22) provenant de sous l'étage supérieur (6) est criblé à travers l'étage supérieur (6) et sur l'étage intermédiaire de transport (8). Le matériau surdimensionné (4) provenant de l'étage supérieur (6) se décharge sur l'extrémité dudit étage supérieur (6) et rejoint le matériau surdimensionné identique (5) provenant de l'étage inférieur (10).
PCT/ZA2023/050005 2022-01-27 2023-01-25 Crible vibrant à triple étage et procédé d'utilisation d'un crible vibrant à triple étage WO2023147607A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2022/01259 2022-01-27
ZA202201259 2022-01-27

Publications (1)

Publication Number Publication Date
WO2023147607A1 true WO2023147607A1 (fr) 2023-08-03

Family

ID=87472555

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2023/050005 WO2023147607A1 (fr) 2022-01-27 2023-01-25 Crible vibrant à triple étage et procédé d'utilisation d'un crible vibrant à triple étage

Country Status (1)

Country Link
WO (1) WO2023147607A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826367A (en) * 1969-01-30 1974-07-30 Tyler W Inc Grain cleaner
CA2184951A1 (fr) * 1995-09-08 1997-03-09 Joseph L. Boccabella Platelage en treillis a panneaux modulaires remplacables
US5614094A (en) * 1994-05-13 1997-03-25 Deister Machine Co., Inc. Vibrating screen unit
US5749471A (en) * 1993-05-10 1998-05-12 Svedala-Arbra Ab Vibrating screen
WO2005107963A2 (fr) * 2004-04-30 2005-11-17 Cpi Wirecloth & Screens, Inc. Separateur a cribles tubulaires
US20150239014A1 (en) * 2010-04-19 2015-08-27 Derrick Corporation Polyurethane screen
GB2560038A (en) * 2017-02-28 2018-08-29 Cde Global Ltd Method and apparatus for washing and grading sand and aggregate

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3826367A (en) * 1969-01-30 1974-07-30 Tyler W Inc Grain cleaner
US5749471A (en) * 1993-05-10 1998-05-12 Svedala-Arbra Ab Vibrating screen
US5614094A (en) * 1994-05-13 1997-03-25 Deister Machine Co., Inc. Vibrating screen unit
CA2184951A1 (fr) * 1995-09-08 1997-03-09 Joseph L. Boccabella Platelage en treillis a panneaux modulaires remplacables
US5816413A (en) * 1995-09-08 1998-10-06 W.S. Tyler, Canada Wire screen deck having replaceable modular screen panels
WO2005107963A2 (fr) * 2004-04-30 2005-11-17 Cpi Wirecloth & Screens, Inc. Separateur a cribles tubulaires
US20150239014A1 (en) * 2010-04-19 2015-08-27 Derrick Corporation Polyurethane screen
GB2560038A (en) * 2017-02-28 2018-08-29 Cde Global Ltd Method and apparatus for washing and grading sand and aggregate

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