| 摘要 |
<p>PURPOSE:To allow return oil to flow from a little-flow return oil port to an operation oil tank without producing any air bubble and back pressure by installing a guide member in such a way as to allow the return oil introduced into a tank main body to flow down along the wall face and also forming an opening for pressure accumulation prevention in the guide member. CONSTITUTION:Little-flow return piping directly returning little-flow return oil to an operation oil tank separately from a main return pipe 3 is detachably attached to a little-flow return oil inflow part 5. The little-flow return oil inflow part 5 is provided in a higher position than the highest liquid level of operation oil in the tank main body 1. A guide pipe 6 is connected to the inside of the tank main body 1 of the little-flow return oil inflow part 5. The guide pipe 6 is a divergence pipe formed by a horizontal pipe part 6a and a vertical pipe part 6b of which both ends are opened to, the opening part in the lower end is extended from the lowest liquid level of the operation oil to downward, and the opening part in the upper end is opened to a position sufficiently higher than the highest liquid level of the operation oil so as to form the opening for pressure accumulation prevention.</p> |
