Patent GB-190808003-A (GB)
Title: Improvements in and relating to Plants for Storing Combustible Liquids.
Inventor: HEER WILHELM
Filed: 1908-04-10
Granted: 1909-02-18
Abstract: 8003. Heer, W. April 10. Direct gas-pressure apparatus; direct liquidpressure apparatus.-The apparatus described in Specification No. 23,886, A.D. 1907, for storing combustible liquids is provided with means for utilizing the inert gas for restoring the inert forcing-fluid into a position in which it can again exert hydrostatic pressure on the column of inflammable liquid. An intermediary vessel 11 is directly connected with the main tank by a non- return valve 12. The rising pipe for the combustible liquid leads from the top of the vessel 11 to the discharge, while a pipe 14 leads to an elevated chamber 16 containing at the beginning of the operation a liquid, such as glycerine, which does not mix with the combustible liquid. A float valve 17 prevents overflow from the chamber 16, which is open to the atmosphere. A measuring-vessel 18 is placed in communication with the container 16 through a port 20 of a two.way tap 19 when this is in the position I, Fig. 5, and when the cock 22 is opened to allow the gas in the vessel 18 to escape, the liquid flows from the vessel 16 into the vessel 18. When the tap 19 is moved into the position II, Fig. 5, it connects the vessel 18 with a pipe 26 and the pipe 14, and at the same time allows carbonic-acid gas to flow from a bottle 28 through a cock 27 and pipe 29 to the vessel 18, so that the liquid in the vessel comes under pressure. At the same time, a valve 31 is pressed back to allow the combustible liquid to flow out, the pipe 34, leading back to the main tank 10 and filled together with the top part of this tank with the neutral gas at normal pressure, being simultaneously closed. This operation can be repeated until the elevated container 16, which is of the same capacity as the tank 11, is discharged. The pressure liquid is conducted back to the container 16 and the vessel 11 is refilled with combustible liquid when all the parts are in the position of rest, as shown in Fig. 3, as follows : When a tap 36 moves against a spring 37 into the position in which a recess 38 corresponds withthe channel leading to the cock 19, the carbonic-acid gas supply is in communication with the tap casing 30. At the same time, a cam 40 causes a valve cone 35 to close upon its seat against the action of a spring. Thus the carbonic-acid gas acts through the pipe 13 upon the liquid in the container 11 and raises it to the vessel 16. When the tap 36 is released, it automatically returns to the position of rest and cuts off the supply of carbonic-acid gas, and the valve 35 opens again, thus allowing the pressure of gas in the two tanks 10, 11 to balance, and the latter to fill through the valve 12. The necessary movement of the tap 19 corresponding with that of the tap 31 is effected by a pivoted lever 45, the upper end of which is connected to the tap 19 by rack-and-pinion gear 46, 47, the motion being limited by a stop 49. When it is necessary to draw off large quantities of liquid, the catch engaging this shoulder is disengaged and the tap 19 comes into the position III, Fig. 5, so that the pipe 26 communicates directly with the pipe 21 and the liquid can flow out without passing through the measuring-vessel 18.