Patent ID: 11920580
Assignee: NIPPON PILLAR PACKING CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. The bellows pump device according to claim 1, wherein
the bellows pump device comprises a first fluid chamber and a second fluid chamber as the fluid chamber,
the bellows pump device comprises, as the bellows, a first bellows configured to suck and discharge the transport fluid when the pressurized fluid is supplied to and discharged from the first fluid chamber and a second bellows expandable/contractible independently of the first bellows and configured to suck and discharge the transport fluid when the pressurized fluid is supplied to and discharged from the second fluid chamber,
the bellows pump device comprises, as the solenoid valve, a first solenoid valve configured to switch supply/discharge of the pressurized fluid to/from the first fluid chamber and a second solenoid valve configured to switch supply/discharge of the pressurized fluid to/from the second fluid chamber,
the bellows pump device comprises, as the fluid pressure adjustment unit, a first fluid pressure adjustment unit configured to adjust the fluid pressure of the pressurized fluid to be supplied to the first fluid chamber and a second fluid pressure adjustment unit configured to adjust the fluid pressure of the pressurized fluid to be supplied to the second fluid chamber,
the bellows pump device comprises, as the detection unit, a first detection unit configured to detect that the first bellows is at the expansion position and output a detection signal and a second detection unit configured to detect that the second bellows is at the expansion position and output a detection signal,
as the initial control, the control unit performs
first initial control in which the first solenoid valve is switched and the pressurized fluid is supplied to the first fluid chamber in advance, thereby determining a first operation fluid pressure which is the fluid pressure of the pressurized fluid to be supplied to the first fluid chamber during the operation, and
second initial control in which the second solenoid valve is switched and the pressurized fluid is supplied to the second fluid chamber in advance, thereby determining a second operation fluid pressure which is the fluid pressure of the pressurized fluid to be supplied to the second fluid chamber during the operation,

as the first initial control, the control unit outputs a control command to the first fluid pressure adjustment unit so as to gradually increase the fluid pressure of the pressurized fluid to be supplied to the first fluid chamber in advance, and when the detection signal is inputted from the first detection unit to the control unit, the control unit determines the fluid pressure of the pressurized fluid supplied to the first fluid chamber at that time as the first operation fluid pressure, and
as the second initial control, the control unit outputs a control command to the second fluid pressure adjustment unit so as to gradually increase the fluid pressure of the pressurized fluid to be supplied to the second fluid chamber in advance, and when the detection signal is inputted from the second detection unit to the control unit, the control unit determines the fluid pressure of the pressurized fluid supplied to the second fluid chamber at that time as the second operation fluid pressure.