US 4,223,696 A · Apparatus for the purpose of avoiding pressure drop between a gaseous or vaporous phase and a liquid phase

Abstract

The apparatus comprises a first chamber in which there is present a gaseous or vaporous medium under pressure and a second chamber which is predominantly filled with a liquid medium under a pressure independent from the pressure in the first chamber. In addition to these two chambers an intermediate chamber is filled in normal operation with substantially the same gaseous or vaporous medium at substantially the same pressure as present in the first chamber. The first chamber is connected through ducts via the intermediate chamber with the second chamber and at normal operation an unavoidable predetermined pressure drop is caused between said intermediate chamber and said second chamber. The pressure regulation is effected by a piston-operated shut off device adapted to assume an open and a closed position which device is disposed between the first and second chamber. The pressure present in the second chamber through the duct means will act on one end of the piston by means of the liquid medium present in the second chamber. The shut-off device is thereby moved into the normal open position. The pressure present in the first chamber by means of the connecting duct acts on the other end of the piston and will cause the shut-off device to move into the closed position if the pressure differential between the two pressures exceeds the predetermined pressure drop by a predetermined value. This will close the shut-off device and thus prevent an overrun from the first into the second chamber because of an excessive pressure drop in the second chamber.

Claims10

Dependent claims

An apparatus for pressure regulation between a gaseous or vaporous phase and a liquid phase, the said apparatus comprising

(a) a first chamber in which there is present a gaseous or vaporous medium under pressure;
(b) a second chamber filled predominantly with a liquid medium which is at a pressure independent from the pressure in said first chamber;
(c) an intermediate chamber filled in normal operation with substantially the same gaseous or vaporous medium at substantially the same pressure as present in said first chamber;
(d) duct means for connecting the said first chamber through said intermediate chamber with said second chamber;
(e) means for causing a predetermined pressure drop between said intermediate chamber and said second chamber, and
(f) a piston operated shut-off device adapted to assume an open and a closed position, the said shut-off device being disposed between said first and said second chamber, the pressure of the second chamber acting on the one end of said piston by means of said liquid medium so as to cause the shut-off device to move into the open position and the pressure in said first chamber acting on the other end of said piston so as to cause the shut-off device to move into the closed position, the differential between said two pressures during normal operation causing the shut-off device to remain in the open position and the said pressure differential causing the shut-off device to move into the closed position when the said pressure drop is exceeded by a predetermined value so as to prevent a sudden overrun from the first into the second chamber in case of said excess pressure drop in the second chamber.

3 more elements

An apparatus for pressure regulation between a gaseous or vaporous phase and a liquid phase, the said apparatus comprising

(a) a first space in which there is present a vaporous medium under pressure;
(b) a second space filled predominantly with a washing or cooling liquid which is at a pressure independent from the pressure in said first space;
(c) duct means for connecting the said first space with said second space;
(d) a piston operated shut-off device adapted to assume an open and a closed position, the said shut-off device being disposed between said first and said second space, the pressure of the second space acting on the one end of said piston by means of said liquid medium so as to cause the shut-off device to move into the open position and the pressure in said first space acting on the other end of said piston so as to cause the shut-off device to move into the closed position, the differential between said two pressures during normal operation causing the shut-off device to remain in the open position and the said pressure differential causing the shut-off device to move into the closed position when the pressure drop is exceeded by a predetermined value so as to prevent a sudden overrun from the first into the second space in case of said excess pressure differential,
the second space being formed as a container for a washing or cooling liquid, the container having an intermediate permeable partition, an inlet for the gas received from said first chamber being provided below said partition and an inlet for the liquid being provided above said partition and a gas outlet being provided in the top portion of the container, whereby the gas percolates through the said liquid and is discharged through said outlet of the container.

2 more elements

Dependencies are inferred from the claim text.

Apparatus for the purpose of avoiding pressure drop between a gaseous or vaporous phase and a liquid phase

Life of this patent

Apparatus for the purpose of avoiding pressure drop between a gaseous or vaporous phase and a liquid phase

Life of this patent

Abstract

Claims10