| 摘要 |
This invention relates to a valve mechanism for draining a liquid from a vessel by means of pressurized gas introduced into the vessel, said mechanism comprising a connecting member mounted on the vessel, having a hollow rising pipe extending to near the bottom of the vessel and being open at the lower end and a closing member located near the top side and urged by a spring mechanism into a closed state and a connecting piece adapted to be coupled with the connecting member and having a gland with the aid of which the closing member can be opened against the action of the spring mechanism for passing pressurized gas through the connecting piece and the connecting member to the vessel and for passing liquid from the vessel through the connecting piece, for which purpose the connecting piece is provided with a gas supply duct and a liquid outlet duct.
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