| 摘要 |
<p>The present invention relates to a vent apparatus for a crude oil storage tank and, more specifically, relates to a vent apparatus for a crude oil storage tank which automatically controls gas pressure inside a storage tank such that expansion and contraction actions of the crude oil storage tank are not generated. The vent apparatus for the crude oil storage tank to control a pressure inside a body by being installed in a crude oil storage tank includes a body to store crude oil; and an injection unit formed on one side of the body, wherein provided is a vent apparatus for the crude oil storage tank comprising: an expansion preventing pipe combined to an upper side of the injection unit, forming a conduit line penetrated upwards and downwards; a first pressure pallet which ascends and descends along the conduit line of the expansion preventing pipe, and opens and closes an upper end of the opened expansion preventing pipe; a contraction preventing pipe arranged on one side of the expansion preventing pipe, forming an opening unit opened downwards on a lower end; a second pressure pallet which ascends and descends along the conduit line of the expansion preventing pipe, opening and closing the opening of the contraction preventing unit; and a connection pipe to form a conduit line which connects the expansion preventing pipe and the contraction preventing pipe by connecting an outer side between the expansion preventing pipe and the contraction preventing pipe.</p> |
