Restarting device for a fluid operated double diaphragm piston pump
AssigneeYamada Corporation
InventorKazumasa Yamada
Life of this patent
Estimating the term…
Abstract
A restarting device of a pump including a center rod defining fluid delivering chambers and driving chambers 11b and 12b. The restarting device of the pump further includes: a change-over valve 2 for switching a direction for the center rod to move, and a restarting hydraulic circuit 3 which, when a supply of the driving fluid from the change-over valve 2 to the driving chambers 11b and 12b in both sides is stopped, detects the supply of the driving fluid into the driving chambers 11b and 12b in both sides having been stopped and then causes the driving fluid to flow into the change-over valve, thereby restarting the supply of the driving fluid into the driving chambers 11b and 12b.
Claims14
A restarting device of a pump in which said pump comprises a center rod having first and second delivering chambers and first and second driving chambers defined at first and second sides thereof, respectively, said center rod being operable to reciprocate in a first direction and a second direction opposite to the first direction so that a fluid-in-transfer is continuously transferred, wherein when said center rod is driven in the first direction, a driving fluid is supplied into said first driving chamber so as to discharge the fluid-in-transfer in said first fluid delivering chamber, and the fluid-in-transfer is suctioned into said second fluid delivering chamber while the driving fluid in said second driving chamber is discharged therefrom, and when said center rod is driven in the second direction, the driving fluid is supplied into said second driving chamber so as to discharge the fluid-in-transfer in said second fluid delivering chamber, and the fluid-in-transfer is suctioned into said first fluid delivering chamber while the driving fluid in said first driving chamber is discharged therefrom;
- said restarting device of the pump comprising:
- a change-over valve for switching a direction of movement of said center rod, and for supplying the driving fluid into said first and second driving chambers;
- and a restarting hydraulic circuit, wherein when a supply of the driving fluid from said change-over valve to said first and second driving chambers is stopped, said restarting hydraulic circuit detects that the supply of the driving fluid into said first and second driving chambers has stopped, and then causes the driving fluid to flow into said change-over valve so as to restart the supply of the driving fluid into said first and second driving chambers.
A restarting device of a diaphragm-type pump in which said diaphragm-type pump comprises a center rod being operable to reciprocate in a first direction and a second direction opposite to the first direction so as to continually transfer a fluid-in-transfer, said center rod being provided with first and second diaphragms on opposite sides thereof, said first and second diaphragms defining first and second fluid delivering chambers and first and second fluid driving chambers, respectively, wherein when said center rod is driven in the first direction, a driving fluid is supplied into said first driving chamber so as to discharge the fluid-in-transfer in said first fluid delivering chamber, and the fluid-in-transfer is suctioned into said second fluid delivering chamber while the driving fluid in said second driving chamber is discharged therefrom, and when said center rod is driven in the second direction, the driving fluid is supplied into said second driving chamber so as to discharge the fluid-in-transfer in said second fluid delivering chamber, and the fluid-in-transfer is suctioned into said first fluid delivering chamber while the driving fluid in said first driving chamber is discharged therefrom;
- said restarting device of the diaphragm-type pump comprising:
- a change-over valve for switching a direction of movement of said center rod, and for supplying the driving fluid into said first and second driving chambers;
- and a restarting hydraulic circuit, wherein when a supply of the driving fluid from said change-over valve to said first and second driving chambers is stopped, said restarting hydraulic circuit detects that the supply of the driving fluid into said first and second driving chambers has stopped, and then causes the driving fluid to flow into said change-over valve so as to restart the supply of the driving fluid into said first and second driving chambers.
Dependencies are inferred from the claim text.