| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid pumping device which can prevent the inclination of an air supply valve body and a lower lifting rod by a simple structure having a reduced number of parts. SOLUTION: This liquid pumping device 1 is provided with a sealed container 2 having an operating fluid introduction port 11, an operating fluid drain port 13, a liquid flow-in port 16 and a liquid drain port 17. An air supply valve 20 in the operating fluid introduction port 11 and an exhaust valve 21 in the operating fluid drain port 13 are changed over to be opened/closed depending on the liquid surface level of a liquid staying in the sealed container 2. At first, the exhaust valve 21 is opened and the air supply valve 20 is closed for the liquid to flow in from the liquid flow-in port 16, and then the exhaust valve 21 is closed and the air supply valve 20 is opened for the liquid staying in the sealed container 2 to be pumped from the liquid drain port 17. In the device, the lower lifting rod 18 is integrally mounted on the air supply valve body 23 of the air supply valve 20 to be guided up and down by an upper guide member 19a and lower guide member 19b. COPYRIGHT: (C)2011,JPO&INPIT
|
