| 摘要 |
The invention relates to a liquid metering pump comprising an intake nozzle (2) provided with an intake valve (3) communicating with a working chamber (4) in which a piston (5) can be moved in an alternating translation movement, suction being produced, with the intake valve open, when the piston moves away from the nozzle, and delivery being produced, with the intake valve closed and liquid emerging through an outlet valve, when the piston moves towards the nozzle; the pump comprises, between the intake valve (3) and the working chamber (4), a device (D) for detecting the variation in pressure, said device (D) comprising a duct (10), which is connected at one end to the working chamber (4) and is provided at its other end with the intake valve (3), and also a means (11) which is sensitive to the pressure in the duct, said means (11) being mounted in the wall of the duct. |
