| 摘要 |
Provided is a diaphragm pump guaranteed with operational reliability that enables a fluid to be continuously sucked and discharged by causing a volume change of an working chamber through a diaphragm pulsating according to the flow of compressed air controlled by movement of a spool constituting an air control valve, and smoothly can pump a fluid by reliably controlling the flow of compressed air using an up-and-down motion of a spool performed by pressure of the compressed air, and thus completely resolving an inoperative situation caused by a delay in motion of the spool. The diaphragm pump includes: a pump body (10), a shaft (20), a first diaphragm (30), a second diaphragm (40), and an air control valve (50). |
| 主权项 |
1. A diaphragm pump guaranteed with operational reliability, comprising:
a pump body (10) having a discharge pipe (16) and a suction pipe (17) installed at an upper side and a lower side thereof, respectively, provided with an exhaust port (18) opening to the outside, and divided into a first working chamber (14) and a second working chamber (15) connected to the suction pipe (17) and the discharge pipe (16) of the left and right, respectively; a shaft (20) installed to be movable to the left or right of the pump body and having one end and the other end configured to protrude to the interior of the first working chamber (14) and the second working chamber (15), respectively; a first diaphragm (30) and a second diaphragm (40) installed at one end and the other end of the shaft (20) respectively, and for dividing the first working chamber (14) into a first fluid chamber (14a) and a first air chamber (14b), and the second working chamber into a second air chamber (15b) and a second fluid chamber (15a), respectively; and an air control valve (50) including a valve body installed at the pump body (10) and provided with an air inlet (51a), and a spool (52) installed to be vertically movable at an inner side of the valve body (51) and for controlling the flow of compressed air entering and exiting from the first air chamber (14b) and the second air chamber (15b), wherein the air control valve (50) is configured such that when the shaft is completely moved to the right or left while the first air chamber (14b) or the second air chamber (15b) is filled with compressed air, the compressed air of the first air chamber (14b) or the second air chamber (15b) flows in a lower space or an upper space of the valve body (51) through a first air outflow passage (53) or a second air outflow passage (54) to enable a lifting or lowering motion of the spool (52) to be performed,whereupon the compressed air, which has already entered in the upper space or the lower space of the valve body (51), along with the compressed air of the first air chamber or the second air chamber are discharged through the exhaust port (18) to the outside, and at the same time, new compressed air entering from the air inlet (51a) flows in the second air chamber (15b) or the first air chamber (14b), so that a fluid is sucked in the first fluid chamber (14a) or the second fluid chamber (15a) by making the first diaphragm (30) and the second diaphragm (40) pulsate to the right or left along the shaft, thereby ensuring continuous pumping of the fluid according to discharge of the fluid sucked in the second fluid chamber (15a) or the first fluid chamber (14b). |
