| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a circulation pump of an erection type, which can reduce facility installation and construction costs, while solving the problem that a water replacing phenomenon is caused by the erection type. <P>SOLUTION: In the circulation pump, an impeller 40 disposed in a pump casing 33 is rotated with the rotation of a rotating shaft 37 to suck hot water from a sucking part 34 of the pump casing 33 and discharge it through an ejection part 35, while the cooling water in a motor casing 10 is circulated while being cooled by a circulation cooling mechanism 43. The circulation pump is provided with an external cooling water supply mechanism 48 for supplying the external cooling water under a supply pressure higher than that within the motor casing 10, and a water supply pipe 49 of the external cooling water supply mechanism 48 is connected to the motor casing 10. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
