| 摘要 |
The present invention relates to a self-priming pump capable of preventing a swirl flow from developing during the self-priming operation and assuring the smooth flow of a stream of water during the pumping operation. The self-priming pump has a main line (12) formed with a swirl flow forming space (15) allowing self-primed water accumulated in a casing (1) to be discharged together with air from a small scroll casing 11 through an auxiliary line (14) to the main line (12) during the self-priming operation to produce a swirl flow in the main line so as to allow air-water separation. The self-priming pump is provided with a plate member (16) for eliminating the swirl flow in the main line below the swirl flow forming space extendedly in the extension direction of the main line.
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