Fluent material handling – with receiver or receiver coacting mea – Processes – Battery grid pasting
Patent
1995-01-23
1997-06-10
Recla, Henry J.
Fluent material handling, with receiver or receiver coacting mea
Processes
Battery grid pasting
141 35, 105358, 137256, B65B 104, B65B 300
Patent
active
056366655
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a method and apparatus for collectively filling and emptying fluid in a plurality of tanks, particularly In a railway train. The apparatus enables filling and emptying by means of a simple hook-up at the filling terminal or discharge terminal.
DESCRIPTION OF THE PRIOR ART
Railway transport by tank cars is hampered by long periods at the terminal for filling or discharging. This is because, until now, it was necessary for each tank to be connected Individually for filling and emptying. Today's systems also involve considerable shifting of Individual cars to and from the filling and discharge area. To make emptying and filling stations which are capable of servicing a plurality of cars, larger installations must be built with safeguards against leakage over a greater area.
Hitherto there has been developed a large-scale American system (TankTrain) which, by interconnection of a plurality of tank cars, pumps the fluid from car to car through a central overlying pipeline. This involves pressurization of the cars, which requires the use of specially constructed tanks. Also, the system is such that the train may be filled and emptied from one end only.
U.S. Pat. No. 3,722,556 and French patents no. 1005385 and no. 2125657 describe various methods for filling and emptying the cars. Danish patent no. 119114 and German laid-open patent application no. 2245594 describe tank cars where the tanks are connected to a common pipeline for filling and emptying. The Danish patent has a common pipeline positioned under the tanks, and each tank is equipped with a ventilation valve. The ventilation is conducted out into the surrounding atmosphere, such that any gases emitted from the fluid can pollute the environment. With this apparatus, as well as the one described in the German laid-open publication, each tank must be filled to the top ("topped off") individually, resulting in a slower and riskier filling process.
SUMMARY OF THE INVENTION
In contrast to the technique described in the Danish patent, according to the present application all of the tanks In the entire train or in a group of cars are connected to the adjacent tanks by a pipeline running between the tops of the tanks, intended for ventilating and topping off the tanks. A very simple filling and emptying procedure is thereby attained whereby, above all, large pressure differences among the tanks are avoided, and the tanks are topped off in parallel.
By using a central underlying filling and discharge line as a main line, together with an overlying return pipeline, the main filling can be done by filling up all the connected tanks in parallel as communicating vessels. For topping off the tanks, the overflow pipe is used.
The method according to the invention for collectively filling a plurality of tanks in, e.g, a railway train or a group of these tanks, where fluid under pressure is supplied to the common, permanently mounted filling and discharge line, where all the valves into the tanks are open, and likewise all safety valves are also open, and where the pumping continues until all the tanks are filled up to nearly full level, e.g., 80-95%, is characterized in that all valves between the pipeline and the tanks are closed with the exception of the valve to the car situated furthest away in relation to the supply end, that the pump pressure in the line is reduced and liquid is pumped into the car situated furthest away relative to the supply end until the remaining volume thereof is filled and fluid is conducted over the pipeline to the tank situated closest thereto, etc., until the entire row of tanks is topped off, whereafter all the valves are closed.
The method according to the invention in an alternative embodiment form for collectively filling a plurality of tanks in, e.g., a railway train or a group of these tanks, where fluid under pressure is supplied to the common, permanently mounted filling and discharge line, where all the valves into the tanks are open, and likewise all safety valves are also o
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patent: 3906995 (1975-09-01), Schmidt
patent: 4002192 (1977-01-01), Mowatt-Larssen
patent: 4079760 (1978-03-01), Hurst
patent: 4266580 (1981-05-01), Dixon
patent: 4304271 (1981-12-01), Mowatt-Larssen
patent: 4711274 (1987-12-01), Mowatt-Larssen
Douglas Steven O.
Recla Henry J.
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