Conveyors: fluid current – Intake to fluid current conveyor – Combined intake and discharge
Patent
1987-07-01
1989-09-12
Peters, Jr., Joseph F.
Conveyors: fluid current
Intake to fluid current conveyor
Combined intake and discharge
406192, 137566, 138 26, 138 31, B65G 5340
Patent
active
048654922
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The invention relates to an actuating device for pipe-chamber feeders of hydraulic transport equipment suitable for forwarding solid materials, e.g. coal or slag inform of a slurry, said equipment containing valves or other closing appliances. In practice such pipe-chambers are mostly of tubular shape.
BACKGROUND OF INVENTION
The function of a chamber (pipe-chamber) feeder consists of the periodical alternate filling of the chambers with slurry at low pressure and of emptying them at high pressure. While performing this function, the closing appliances, especially valves or sliding valves have to be opened and closed in a certain sequence and at short time periods. This can be most advantageously performed in a manner as it is described in the Hungarian Patent Specifications No. 160 526. If in any of the chambers the flow of slurry is stopped by closing the corresponding closing appliances, said chamber is then pressurized, which is relatively time-consuming when known prior-art equipment is used. For pressurizing, i.e. for increasing the pressure in a closed chamber, only a limited amount of the water flow delivered by the water pump can be used, the amount required would not cause considerable changes in either the quantity or the pressure of the water delivered by said pump.
From the aforementioned it becomes obvious that with traditional equipment a long-lasting time consuming changeover not only results from the slow motion of the closing appliances, but also from the fact that the above mentioned pressurizing of the pipechambers is rather time-consumptive with the result being the output of the equipment is considerably reduced. In addition, the pump transferring slurry from the slurry-tank into the pipe-chambers is prevented from working during the long changeover period so that if large quantities of slurry continuosuly arrive, solid matter may deposit in the slurry tank that can lead to serious break-downs.
SUMMARY OF INVENTION
In order to eliminate the above and other deficiencies it seems to be advisable to reduce the time requirement of said changeover. In accordance with the present invention the desired reduction of time for changeover is achieved by shortening the duration of pressure equalizing. According to a basic idea that has led to the present invention it follows that if pressure is not equalized merely by a partial water-flow taken from the pressure pipe of the water pump during changeover, but for this purpose, entirely or at least partly, stored high-pressure water is used, pressurizing of the pipe-chambers can be performed very quickly, within a split of the time that has been needed up to now. In addition to this, it will no longer be necessary to suddenly take a large amount of water from the pressure pipe of the water pump in a short period of time, which would negatively influence the operation of the pump concerned.
Summing up the above, the essence of the invention lies in the application of a dashpot or any similar pressure storing unit arranged to the pressure equalizer pipe interconnecting the high-pressure pure-water pump of the filling pump with the auxiliary closing appliances, in such pressure storing unit the carrier liquid is subjected to the effect of a gas or air cushion. In such a new structure the water in the pressure storing unit will be re-pressurized in the intervals between two changeovers and such stored pressure can be applied to the pipe-chamber upon every changeover without any delay and within a very short time.
BRIEF DESCRIPTION OF THE DRAWINGS
One way of carrying out the invention is described in detail below with reference to drawings which illustrate only one specific embodiment of the invention and on which:
FIG. 1 is a schematic diagram of a two pipe-chamber feeder for hydraulic transport comprising the inventive actuating device.
DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
The invention will now be described in detail by way of example only, with reference to the accompanying drawing showing the schemat
REFERENCES:
patent: 2938751 (1960-05-01), Nogami
patent: 3560053 (1971-02-01), Ortloff
patent: 4029362 (1977-06-01), Kortenbusch
patent: 4082367 (1978-04-01), Kocsanyi et al.
patent: 4371294 (1983-02-01), Sakamoto
Ajtai Laszlo
Illes Karoly
Kocsanyi Laszlo
Heves Megyei Tanacsi Epitoipari Vallalat
Kannofsky James M.
Kozponti Banyaszati Fejlesztesi Intezet
Peters Jr. Joseph F.
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