Before the application of dosing metering pump, it is necessary to have a practical understanding of its construction principle and total flow adjustment characteristics.

Structural principle characteristics

Pump structure

The pump is composed of motor, gear box, engine cylinder and other three parts of the dosing metering pump drive gear box device is composed of CAM mechanism, stroke adjustment organization and transmission ratio worm gear organization; The tappet travel is adjusted according to the rotating adjustment handwheel, thereby changing the diaphragm telescopic spacing to achieve the overall goal of changing the total flow rate. The engine cylinder block is composed of water pump impeller, suction self-operated regulating valve, discharge self-operated regulating valve, diaphragm diaphragm plate base and so on.

principle

The motor promotes the vortex rod through the shaft connecting device and reduces the speed of the worm gear to make the spindle bearing and rack rotate and exercise, and the rack promotes the tappet to exercise continuously in the guide barrel. Continuous diaphragm, according to the function of the product to gradually create a vacuum pump in the pump chamber, suction valve open, suction liquid; When the diaphragm moves forward dead point, this time the suction valve is closed, the discharge valve is opened, and the liquid is discharged under the promotion of the diaphragm. In the reciprocating operation of the pump according to the adjustment stroke, continuous working pressure is caused, and the liquid is quantitatively discharged.

Total flow adjustment features

The total flow of the dosing pump is adjusted by rotating the adjusting handwheel to promote the rotation of the extruder screw, so as to change the interval between the tappets and change the motion of the diaphragm in the pump chamber to determine the size of the total flow. The scale for adjusting the handwheel is based on the diaphragm travel, and the accuracy is 95%.