| 摘要 |
PURPOSE:To hold the liquid level in a vibration pipe, whose bottom is situated under liquid and which is equipped at its top with a valve mechanism, by supporting the vibration pipe by an exciter device, and by putting the gas space in said pipe in communication to the outside air through a valve. CONSTITUTION:Bottom of a vibration pipe 3 is situated under the liquid 2 contained in a water tank 1, wherein the vibration pipe 3 is supported by an exciter rod 4 of an exciter device 4. Valve plate 8 pressed by a spring 7 in contact with the spring seat 6 is put in contact with the top of the vibration pipe 3 so as to form a valve seat 9. Here one end of a pipe 11 is fixed to the wall surface in the upper part of the vibration pipe 3, while the other end of said pipe 11 is coupled through a flexible tube 12 to a pipe 14 furnished with a valve 13. Thereby the gas in the vibration pipe 3 can be bled at a point between the above-mentioned valve plate 8 and valve seat 9 as the pipe 3 performs vertical motion, so as to permit the liquid 2 to rise into the pipe 3. The mass of the gas bled from this vibration pipe 3 is made equal to that of the gas taken in from the valve 13 by adjusting the degree of opening of the valve 13 so as to keep the liquid surface constant. |
