| 摘要 |
<p>PURPOSE:To provide a drain pump for a concrete cutter having sufficient drain efficiency in the case that solid is included by muddy water. CONSTITUTION:A seal member 13 is arranged between a cylinder 11 having openings 18, 19 and a piston 12 inside the cylinder 11. A suction valve 14 is arranged between a flow passage 22 communicated with an opening 18 of the cylinder 11 and a water inflow passage 20 communicated with an opening of the cylinder 11, for opening and closing the water inflow passage 20 when the piston 12 is reciprocated. A water discharge valve 15 is arranged on a drain passage 21 communicated with a flow passage 22, for opening and closing the drain passage 21 when the piston 12 is reciprocated. A spherical float 33 is arranged at the suction valve 14 for opening and closing a valve port 16 formed on the water inflow passage 20, while a spherical float 34 is arranged at the drain valve 15 for opening and closing a valve port 17 of the drain passage 21.</p> |
