GB2096479A - Sieving apparatus - Google Patents

Sieving apparatus Download PDF

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Publication number
GB2096479A
GB2096479A GB8111966A GB8111966A GB2096479A GB 2096479 A GB2096479 A GB 2096479A GB 8111966 A GB8111966 A GB 8111966A GB 8111966 A GB8111966 A GB 8111966A GB 2096479 A GB2096479 A GB 2096479A
Authority
GB
United Kingdom
Prior art keywords
sieve screen
retaining member
screen
sieve
support ring
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Withdrawn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
GB8111966A
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.)
Russell Finex Ltd
Original Assignee
Russell Finex 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 Russell Finex Ltd filed Critical Russell Finex Ltd
Priority to GB8111966A priority Critical patent/GB2096479A/en
Publication of GB2096479A publication Critical patent/GB2096479A/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Withdrawn legal-status Critical Current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
    • 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
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0307—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements
    • B01D33/033—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with bag, cage, hose, tube, sleeve or the like filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/74—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging filtrate
    • 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
    • B07B1/06—Cone or disc shaped screens
    • 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
    • B07B1/48—Stretching devices for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes

Abstract

Sieving apparatus 1 comprises a hollow container in which is mounted a sieve screen 10 attached to a horizontal circular support ring 11. Material to be sieved is passed into the container through an inlet 17 and sieved material leaves the apparatus through an outlet pipe 18. The sieve screen is maintained in a generally conical configuration by a central retaining member 20 or alternatively by a hook attached to the container by tubular struts. The conical shape of sieve screen allows material which will not pass through the screen to collect around its lower end, thus not hindering the sieving taking place over the majority of the screen. <IMAGE>

Description

SPECIFICATION Sieving apparatus This invention relates to sieving apparatus.
The invention provides sieving apparatus comprising a sieve screen support ring in a generally horizontal plane, a sieve screen attached to the support ring and depending generally downwardly and inwardly therefrom to a lowest extremity, and a sieve screen retaining member engaging a portion of the sieve screen at or adjacent said lowest extremits to hold the screen undertension during sieving.
The retaining member may abut the sieve screen from above or may engage it from below. In the latter case, the retaining member may comprise a hook to which the sieve screen is connected. The retaining member may comprise an elongate portion of circular cross-section and arranged generally vertically.
Means are preferably provided for adjustably mounting the retaining member relative to the support ring whereby the tension in the sieve screen may be varied. Such adjustable mounting means preferably comprises a tubular member held rigid relative to the screen and in which the retaining member is located, and means for clamping the retaining member to the tubular member. The clamping means may comprise a pair of rings mounted aboutthe retaining member one above and one below the tubular member and fastened to an intermediate member, and a clamping pin threadedly mounted in the intermediate member and engageable with the tubular member to grip the retaining member between the rings and the tubular member.
The support ring and sieve screen are preferably mounted in a hollow container which has an inlet above the sieve screen for the ingress of material to be sieved and an outlet below the sieve screen for the passage of material which has passed through the sieve. The tubular member may be secured to the container by a plurality of struts.
Alternatively, the retaining member may be secured to the container by a plurality of struts.
Preferably, the retaining member is substantially hollow and comprises an inlet adjacent to the sieve screen whereby to allow material which has not passed through the sieve screen and collects at said lowest extremity to be removed from the apparatus by suction.
Typically, the support ring is generally circular so that the sieve screen can be generally conical. Thus the retaining member may engage the sieve screen substantially centrally of the support ring.
The apparatus preferably further comprises means for vibrating the sieve screen.
Two embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a sectional elevation of a first embodiment of sieving apparatus; Figure 2 is a plan view of the sieving apparatus of Figure 1; and Figure 3 is a sectional elevation corresponding to Figure 1 of a second embodiment of the invention.
Sieving apparatus generally indicated 1 comprises a sieve screen 10 attached to a horizontal circular support ring 11 mounted in turn in a container having upper and lower portions 13 and 14 respectively.
Material to be sieved is passed in through an inlet 17 to the upper container portion 13 and material which has passed through the sieve screen passes out from the lower container portion 14 through an outlet pipe 18.
The sieve screen 10 has a generally conical configuration and is maintained in tension in the conical configuration by the engagement of a central upright retaining member 20. The member 20 may have the sieve screen 10 secured thereto but in the illustrated embodiment merely exerts a downward force on the sieve screen 10. The retaining member 20 comprises an elongate tubular portion 21 and a rounded end cap 22 for engagement with the lowest extremity of the sieve screen 10. The tubular portion 21 is provided with an inlet 24 to permit material which has not passed through the sieve screen 10 to be removed by suction from the apparatus by means of a diaphragm pump (not shown).
The retaining member 20 is secured adjustably relative to the sieve screen by a clamping device which clamps the member 20 to a tubular sleeve 25 welded to three tubular struts 26 which are welded in turn to the inside of the upper container portion 13.
The clamping device comprises upper and lower rings 28 and 29 connected together by an intermediate bar 30, and a clamping pin in the form of a bolt 31 mounted in a correspondingly threaded hole in the bar 30. The bolt 31 passes through the hole and engages the sleeve 25, thus clamping the abutment member 20 between the sleeve 25 and the rings 28, 29. By loosening the bolt31, the member 20 may be adjusted vertically while sliding within the sleeve 25 and rings 28,29 to vary the tension in the sieve screen 10 or to be disengaged therefrom, and by tightening the bolt 31 again the member 20 can be secured in the adjusted position.
The container 13, 14 and support ring 11 with sieve screen 10 form an assembly which is vibrated relative to a base (not shown) to assist with the sieving process.
Figure 3 shows an alternative embodiment of the invention having a conical sieve screen 10' similar to that of the first embodiment. However, this second embodiment has a retaining member in the form of a hook40 which engages a loop portion of the sieve screen 10' to maintain the screen in tension. The hook 40 is welded to a plate 43 secured in turn to three tubular struts 44 flattened at their inward ends, the struts 44 baing welded to the lower container portion 14 in a similar manner to the attachment of the struts 26 to the portion 13 in the first embodiment An advantage of the aforedescribed embodiments is that the conical shape of the sieve screen main The drawings originally filed were informal and the print here reproduced is taken from a later filed formal copy.
tained by the retaining member allows material which will not pass through the screen, for example skins in the sieving of paint, to collect around the lower end of the screen and thus not hinder the sieving process taking place over the majority of the screen. Furthermore, the predominantly tubular nature of the retaining member of the first embodiment allows such thick or oversize material to be withdrawn from the sieve screen, and this may be done continuously while sieving is taking place.

Claims (17)

1. Sieving apparatus comprising a sieve screen support ring in a generally horizontal plane, a sieve screen attached to the support ring and depending generally downwardly and inwardly therefrom to a lowest extremity, and a sieve screen retaining member engaging a portion of the sieve screen at or adjacent said lowest extremity to hold the screen under tension during sieving.
2. Apparatus as claimed in Claim 1 wherein the retaining member abuts the sieve screen from above.
3. Apparatus as claimed in Claim 1 wherein the retaining member engages the sieve screen from below.
4. Apparatus as claimed in Claim 3 wherein the retaining member comprises a hook to which the sieve screen is connected.
5. Apparatus as claimed in any preceding claim wherein the retaining member comprises an elongate portion of circular cross section and arranged generally vertically.
6. Apparatus as claimed in any preceding claim further comprising means for adjustably mounting the retaining member relative to the support ring whereby the tension in the sieve screen may be var- ied.
7. Apparatus as claimed in Claim 4 wherein the adjustable mounting means comprises a tubular member held rigid relative to the screen and in which the retaining member is located, and means for clamping the retaining member to the tubular member.
8. Apparatus as claimed in Claim 5 wherein the clamping means comprises a pair of rings mounted about the retaining member one above and one below the tubular member and fastened to an intermediate member, and a clamping pin threadedly mounted in the intermediate member and engageable with the tubular member to grip the retaining member between the rings and the tubular member.
9. Apparatus as claimed in any preceding claim further comprising a hollow container in which the support ring and sieve screen are mounted and having an inlet above the sieve screen for the ingress of material to be sieved and an outlet below the sieve screen for the passage of material which has passed through the sieve.
10. Apparatus as claimed in Claim 7 and either Claim 5 or Claim 6 wherein the tubular member is secured to the container by a plurality of struts.
11. Apparatus as claimed in any one of Claims 1 to 5 wherein the retaining member is secured to the container by a plurality of struts.
12. Apparatus as claimed in any preceding claim wherein the retaining member is substantially hollow and comprises an inlet adjacent the sieve screen whereby to allow material which has not passed through the sieve screen and collects at said lowest extremity to be removed from the apparatus by suction.
13. Apparatus as claimed in any preceding claim wherein the support ring is generally circular.
14. Apparatus as claimed in Claim 10 wherein the sieve screen is generally conical.
15. Apparatus as claimed in either Claim 9 or Claim 10 wherein the retaining member engages the sieve screen substantially centrally of the support ring.
16. Apparatus as claimed in any preceding claim further comprising means for vibrating the sieve screen.
17. Apparatus substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB8111966A 1981-04-15 1981-04-15 Sieving apparatus Withdrawn GB2096479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8111966A GB2096479A (en) 1981-04-15 1981-04-15 Sieving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8111966A GB2096479A (en) 1981-04-15 1981-04-15 Sieving apparatus

Publications (1)

Publication Number Publication Date
GB2096479A true GB2096479A (en) 1982-10-20

Family

ID=10521194

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8111966A Withdrawn GB2096479A (en) 1981-04-15 1981-04-15 Sieving apparatus

Country Status (1)

Country Link
GB (1) GB2096479A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104083937A (en) * 2014-07-02 2014-10-08 云南大红山管道有限公司 Device for automatically cleaning accumulated ores
USD759328S1 (en) * 2013-08-29 2016-06-14 James Cleere Ice scraper design
USD959080S1 (en) * 2020-05-27 2022-07-26 Victor Liuzza Folded plate scraper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD759328S1 (en) * 2013-08-29 2016-06-14 James Cleere Ice scraper design
CN104083937A (en) * 2014-07-02 2014-10-08 云南大红山管道有限公司 Device for automatically cleaning accumulated ores
USD959080S1 (en) * 2020-05-27 2022-07-26 Victor Liuzza Folded plate scraper

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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)