| 摘要 |
A metering pump includes a pump sleeve (3) and a pump body (2) slidably mounted in the pump sleeve (3), a plunger (1) is arranged in the chamber of the pump body (2), a flow guiding hole communicated with the chamber is provided in the slide wall of the pump body (2), and a liquid suction hole (9) and a liquid discharging hole (10) are provided in the pump sleeve (3), the openings of the liquid suction hole (9) and the liquid discharging hole (10) opened on the inner side of the pump sleeve (3) are on the sliding track of the opening of the flow guiding hole (11) opened on the pump body (2).
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