| 摘要 |
PURPOSE:To obtain a compact, low-cost drain discharging pump which can discharge the drain of plural systems by arranging tubes which can deform elastically at the peripheral part of an eccentric pressure roller. CONSTITUTION:When a tube 10 is deformed by the pressure roller 9, its internal pressure rises and valve seat members 13a and 13b are closed with ball valves 14a and 14b of a check valve 11. Ball valves 19a and 19b of a check valve 16 are pressed up with the internal pressure of the tube 10 to open valve seat members 18a and 18b, and the drain in the tube 10 is discharged to a connecting pipe 20b together with sample gas. When the pressure roller 9 releases the tube 10, the tube 10 restores itself to its original state and the ball valves 19a and 19b close the valve seat members 18a and 18b to stop the drain from flowing reversely, and the ball valves 14a and 14b are elevated to open the valve seat members 13a and 13b, thereby making the sample gas and drain to flow in the tube 10 from a connection pipe 15b. |
