| 摘要 |
<p>It is an object of the invention to, even in the case where transported liquid containing a sedimenting material such as slurry is used, prevent the sedimenting material from stagnating and collecting in a liquid chamber of a pump. In order to attain the object, a diaphragm 7 that reciprocally moves in an axial direction, such as a diaphragm is disposed in a pump body 1 so as to form a liquid chamber 9 with respect to an inner wall 4a of the pump body 1. A suction port 18 and a discharge port 19 are disposed in the inner wall 4a. A stroke of sucking liquid from the suction port 18 into the liquid chamber 9, and a stroke of discharging the liquid in the liquid chamber 9 from the discharge port 19 are alternately performed by reciprocal motion of the diaphragm 7. The suction port 18 is disposed in a side face of a protruding tip end portion of a suction check valve 20 which is fixed so as to protrude into the liquid chamber 9 from the inner wall 4a of the pump body 1, thereby ejecting the sucked liquid toward a circumferential wall 9a in the liquid chamber 9. Therefore, the sucked liquid ejected from the suction port 18 produces a swirling flow along the circumferential wall 9a in the liquid chamber 9, and the interior of the liquid chamber 9 is stirred by the swirling flow. Consequently, staying of liquid in the liquid chamber 9 is reduced to enable fresh liquid to be always supplied, and, even in the case where liquid containing a sedimenting material such as slurry is used, the sedimenting material can be prevented from sedimenting and aggregating in the liquid chamber 9. <IMAGE></p> |
