Multi chamber transfer device

Dispensing – With discharge assistant – Movable or conveyer-type trap chamber

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Details

48209, 414219, G01F 1110

Patent

active

058199926

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to improvements in and/or relating to multi chamber transfer devices (eg. valves) useful in transferring between different pressure zones (if there be any pressure difference at all) solid materials in particulate, powdered or any other form along with associated gases and liquids preferably capable of being transferred under the assistance of gravity.


BACKGROUND ART

In our New Zealand Patent Specification No. 229080 (European equivalent Application No. 90304922.9 and Australian equivalent Application No. 55013/90) there is disclosed a process of preparing a hydrolysed lignocellulosic material, the full content of which is hereby incorporated by way of reference.
The present invention could have application in such a process/system between different pressure situations or in improved versions thereof. Indeed, the present invention can provide an alternative in many situations to the very expensive and high upkeep "Bauer valves" (Sprout-Bauer inlet rotary valves manufactured and sold by Andritz Sprout-Bauer Australia Pty. Limited of 22 Princes Highway, Dandenong, Victoria 3175, Australia), or any such other rotary devices or devices that do not involve rotary chambers and which are used by default in the absence of an economic way of feeding materials from one vessel to another.


DISCLOSURE OF INVENTION

It is, therefore, an object of the present invention to provide an alternative to existing transfer devices.
In a first aspect the present invention consists in a transfer device for, or operatively incorporated in a system for, transferring materials from one fluid environment to another without substantial loss of one fluid into the other owing to any pressure differential between the environments, said device being of a kind having
a top member or assembly having at least one port (hereinafter "ported top member") to receive to said port(s) from above fluid and materials of said one fluid environment,
a bottom member or assembly having at least one port (hereinafter "ported bottom member") to lead down into said second fluid environment, and a rotatable rotor or carousel member (hereafter "carousel member") having a plurality of both opened topped and opened bottomed passageways, each capable of being serially
(a) registered to a port of said ported top member while out of register with any port(s) of said ported bottom member,
(b) out of register with any port(s) of said ported top and bottom members, and
(c) registered to a port of said bottom ported member while out of register with any port of said ported top member,
the device being characterised in that there is provided means to rotate said carousel member intermittently so that each passageway can in its turn progress through the conditions (a), (b) and (c) serially with a dwell period at each
and being further characterised in that means is provided to maximise a sealing pressure to the assembly such that each of said ported top and ported bottom members seal about the open topped and open bottom passageways of the rotatable carousel member more during any such dwell period than at any time when the carousel member is being moved.
Preferably said intermittent movement of said transfer device is such that each of said dwell periods is longer than each of the periods of time needed to move the rotatable carousel members between adjacent cyclic conditions.
Preferably a fluid pressure provides said sealing pressure, one or other of said ported top and ported bottom members having at least one part thereof acting as a piston movable parallel to the rotational axis of said carousel member by selective pressurisation of a cylinder or chamber closed by said piston, an increased pressurisation increasing the sealing pressure.
Preferably a means is provided whereby said cylinder(s) or chamber(s) of said piston or pistons are capable of being vented to reduce the sealing pressure.
Preferably when operatively connected into a system and the fluid pressure in one or other of said fluid environments is higher

REFERENCES:
patent: 1995145 (1935-03-01), Frost
patent: 2947654 (1960-08-01), Chapman
patent: 4043049 (1977-08-01), Hedstrom
patent: 4152197 (1979-05-01), Lindahl et al.
patent: 4326913 (1982-04-01), Mattson
patent: 4376600 (1983-03-01), Egli
patent: 4606789 (1986-08-01), Reinhall
patent: 4708746 (1987-11-01), Hinger
patent: 5094403 (1992-03-01), Tschumi
Y.N. Kholkin, "Technology of hydrolysing products", Moscow Publishers, Forestry Industry, dated Jan. 6, 1989 pp. 183-187.
Abstract of French 2,278,125 S A Basile.
Abstract of Japan 58-135030--Aritsume Moriyama, Sankou Kuuki Souchi.
Abstract of Japan 2-255423--Yasuo Kiuchi, Kikkoman Corp.

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