| 摘要 |
<p>PURPOSE:To aim at the perfectization of repair and replacement, by filling up the inside of a protection pipe and a discharge pipe with water as a full tank, the recovering liquefied petroleum gas into a storage tank. CONSTITUTION:Vertical two-stage partition walls 3 and 4 are installed in a longitudinal hole 2 of an underground storage tank 1, while a protection pipe 5 is inserted from the ground to a lower part of LPG 6, and locked to these concrete partition walls 3 and 4. And, a discharge pipe 7 is inserted into this protection pipe 5, projecting an upper part of the discharge pipe 7 somewhat upward the protection pipe 5, and it is locked to an upper part of the protection pipe 5. Valves 11 and 12 are installed in the discharge pipe 7 and the protection pipe 5, and connected with an interconnecting hose 13. With this constitution, repair and replacement operations are perfectly and simply performable.</p> |
