GB993849A - Improvements relating to filters - Google Patents

Improvements relating to filters

Info

Publication number
GB993849A
GB993849A GB24714/61A GB2471461A GB993849A GB 993849 A GB993849 A GB 993849A GB 24714/61 A GB24714/61 A GB 24714/61A GB 2471461 A GB2471461 A GB 2471461A GB 993849 A GB993849 A GB 993849A
Authority
GB
United Kingdom
Prior art keywords
screens
screen
casing
ports
operative
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.)
Expired
Application number
GB24714/61A
Inventor
Derek Anthony Cunlif Wilkinson
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.)
Ledward & Beckett Ltd
Original Assignee
Ledward & Beckett 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 Ledward & Beckett Ltd filed Critical Ledward & Beckett Ltd
Priority to GB24714/61A priority Critical patent/GB993849A/en
Publication of GB993849A publication Critical patent/GB993849A/en
Application status is Expired legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
    • B01D29/01Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor with flat filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/66Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/668Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with valves, e.g. rotating valves for coaxially placed filtering elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Other filtering devices; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks

Abstract

993,849. Filters. LEDWARD & BECKETT Ltd. June 27, 1962 [July 7, 1961], No. 24714/61. Heading BID. A filter includes a pair of screens arranged in the form of a V and mounted in a casing having inlet and outlet ports, so that the pair of screens can move between two positions in which the inlet port is on opposite sides of the apex of the V, while the outlet port communicates with the space between the limbs of the V in both positions. The screens may be arranged to move linearly in a casing of uniform cross-section, or preferably, arranged to turn about a pivot in a cylindrical casing. Thus, in one position, one screen is between outlet and inlet ports, while the other is between outlet port and a stagnant pocket. In the other position, the role of the screens is reversed. Preferably a flushing valve is provided in each of the stagnant pockets of the casing so that momentary opening of the appropriate valve to a low pressure region, e.g. a drain, causes a reverse flow through the inoperative screen and washes dirt therefrom. In one embodiment, Fig. 1, the screens and casing form a selfcleaning strainer box for use in e.g. a cooling water circulating system. The box comprises a casing 10 having inlet and outlet ports 14 and 15, provided with pipe connecting flanges 16 and 17. Within the casing, a frame comprising screens 18 and 19 is mounted on a pivot 22 so that the screens can be rocked between the two operative positions shown in Figs. 1 and 5. In one end plate of the casing, are mounted flushing valves comprising ports 26 and 27 covered by arcuate plates 28 and 29 connected to the frame that carries the screens. The extent of the plates is such that the ports are covered in both operative positions of the screens, but if the pair of screens is moved beyond one operative position, the flushing valve of the inoperative screen is opened, Fig. 6. Thus, with the screens in one operative position, Fig. 1, liquid flows through screen 19, which collects dirt on its outer surface. When the screen becomes clogged, the screens may be moved to and momentarily beyond the other operative position, Figs. 5 and 6, so that the screen 18 becomes operative and, due to the opening of the flushing valve, dirt is washed from screen 19 by reverse flow. The movement may be effected manually or automatically. In a preferred arrangement, a pressure drop across the strainer caused by clogging of a screen causes a pressure differential switch to actuate a motor connected via a cam and connecting rods to the central shaft 22 so that a change-over to the clean screen, and a momentary reverse flow through the dirty screen, are effected, leaving the latter screen in readiness for the next change-over.
GB24714/61A 1961-07-07 1961-07-07 Improvements relating to filters Expired GB993849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB24714/61A GB993849A (en) 1961-07-07 1961-07-07 Improvements relating to filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24714/61A GB993849A (en) 1961-07-07 1961-07-07 Improvements relating to filters

Publications (1)

Publication Number Publication Date
GB993849A true GB993849A (en) 1965-06-02

Family

ID=10216080

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24714/61A Expired GB993849A (en) 1961-07-07 1961-07-07 Improvements relating to filters

Country Status (1)

Country Link
GB (1) GB993849A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945287A1 (en) * 1979-11-09 1981-06-04 Riedel Technik Gmbh Means to clean the pipes of innenflaechen
FR2564745A1 (en) * 1984-05-25 1985-11-29 Taprogge Gmbh Device for mechanically cleaning liquids
EP0207233A1 (en) * 1985-04-05 1987-01-07 Accor Technology, Inc. Straining and stop valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945287A1 (en) * 1979-11-09 1981-06-04 Riedel Technik Gmbh Means to clean the pipes of innenflaechen
FR2564745A1 (en) * 1984-05-25 1985-11-29 Taprogge Gmbh Device for mechanically cleaning liquids
EP0207233A1 (en) * 1985-04-05 1987-01-07 Accor Technology, Inc. Straining and stop valve
AU607680B2 (en) * 1985-04-05 1991-03-14 Remco Research And Development, Inc. Straining and stop valve

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