| 摘要 |
<p>1,134,423. Pumping liquids. ASSOCIATED OCTEL CO. Ltd. April 27, 1967 [April 27, 1966], No. 18466/66. Heading F1R. In liquid transfer apparatus for transferring liquid from a first to a second tank a priming vessel is first connected to and filled with liquid from the first tank and subsequently liquid is drawn through the priming vessel and discharged into the second tank. In the first embodiment shown in Fig. 1 the priming vessel a is evacuated by an ejector p supplied with water by a pump r from a reservoir S so that liquid is drawn in from tank f. At a level determined by a float switch U the valves h, l, m, k are operated, pump r is stopped and the pump g is operated to draw liquid from tank f through the vessel a and discharge it to the tank i which may be vented back to tank f. When tank f has been emptied the pump r is started by float switch b so that vacuum is applied to pipes d, I while they are being disconnected. In a second embodiment Fig. 1a (not shown) the pump g is mounted within the vessel a. In a third embodiment Fig. 2 the pump 105 is mounted in the priming vessel 100 and by circulating residual liquid 104 through an ejector 111 liquid is drawn from a tank 103 into the vessel 100, air being discharged at 106. Subsequently valves are closed by switch 117 and the pump 105 pumps liquid from the tank 103 to the tank 109. In a further embodiment Fig. 3 (not shown) the arrangement is similar to that of Fig. 1 but the discharge pump is that described in Specification 1,094,818 and the apparatus is used to inject lead alkyl from a tank 19 into a gasoline line 31 in quantities measured by the pump which first empties the tank 19 into tank 32 and subsequently pumps from 32 into the line 31. Alternatively it may pump from tank 19 directly to the line 31.</p> |
