Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Patent
1992-02-10
1993-09-07
Bertsch, Richard A.
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
91 4R, 60478, F04F 110, F04F 114, F15B 2104
Patent
active
052422720
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a method for pumping a liquid at high temperature, this is a temperature above 98 degrees Centigrade through a pipe, according to which the liquid at high temperature is pressed by means of a fluid at a temperature lower than the high temperature away out of a first reservoir that is mounted on an extremity of the pipe, the liquid at high temperature which is pumped away is taken up in a second reservoir that is mounted on the other extremity of the pipe, while the aforementioned fluid that is in the second reservoir is let out, and after a time the liquid at high temperature is now pressed out of this second reservoir and is taken up again in the first reservoir, and this by means of the aforementioned fluid that is now let out of the first reservoir and is pumped into the second reservoir.
Fluid that is inert in relation to the liquid at high temperature is a fluid, gaseous or liquid, that does not mix or react with the liquid at high temperature.
The liquid at high temperature does not come into contact with moving pump parts but only with the inert fluid at lower temperature, for pumping for which pumps on the market can be used without problems.
DISCUSSION OF THE RELATED ART
A method of this kind is known from FR-A-1 557 569. This document describes pumping liquid sodium using an inert oil. Although the two reservoirs are each provided with level detectors, only predetermined limit levels are detected to determine the moment the flow direction of the liquid through the pipe from one reservoir to the other has to be inverted.
SUMMARY OF THE INVENTION
A first object of the invention is to provide a method according to which a possible clogging of the pipe will be immediately detected.
For this purpose, the level of the liquid at high temperature in a reservoir and the temperature of the liquid during pumping are measured at least from time to time, the expansion or shrinking of the liquid due to changes in temperature is calculated and the flow rate is calculated on the basis of changes of level and taking into account the calculated expansion or shrinking.
The flow measurement permits immediate detection of clogging.
Another object of the invention is to provide a method according to which possible leaks in the pipe can be detected. Leaks, especially of sodium, may be very dangerous.
For this purpose, the level of the liquid at high temperature in both reservoirs and the temperature of the liquid during pumping are measured at least from time to time, the total liquid volume contained in the device is calculated on the basis of the levels measured and this volume is compared with a total volume calculated from a preceding level measurement, possibly taking into account a change in volume due to a temperature change of the liquid if such change did occur between the two measurements.
This invention also relates to a device which is especially suitable for utilizing the method according to one of the aforementioned embodiments.
The invention thus relates to a device for pumping liquid at high temperature, this is a temperature above 98 degrees Centigrade through a pipe, the device comprising two reservoirs which are mounted on both extremities of the pipe, two supply pipes for supplying respectively to each of the reservoirs a fluid at a temperature lower than the high temperature that is inert in relation to the liquid at high temperature, means to close the supply pipes separately so that when one is closed the other can be open, at least one pump to pump fluid at low temperature via the supply pipes into one reservoir respectively the other reservoir, two outlet pipes to let the inert fluid out of one respectively the other reservoir, means to close these outlet pipes separately in such a manner that when one is closed the other can however be open, and a level indicator mounted in the two reservoirs for measuring the level of the liquid at high temperature.
In a first embodiment, the device is characterised in that it comprises means to meas
REFERENCES:
patent: 3005417 (1961-10-01), Swaney
patent: 3901033 (1975-08-01), McAlister
patent: 4086765 (1978-05-01), Gillilan
Patent Abstracts of Japan, vol. 6, No. 232 (M-172) (1110), Nov. 18, 1982, & JP, A, 57131900 (Kosumo Automation K.K.) Aug. 14, 1982.
Ven Irja
Ven Juha
Ven Kari
Ven Petri
Ven Timo
Bertsch Richard A.
McAndrews Roland
LandOfFree
Method and device for pumping a liquid at high temperature throu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for pumping a liquid at high temperature throu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for pumping a liquid at high temperature throu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-483123