Metering pump plays an important role in modern industry, then the general metering pump what are the structure of it, and what is its principle of work, many users believe that this is the question that we are going to talk about the structure and working principle of the metering pump.

The metering pump consists of three parts, such as motor, transmission box and cylinder block.

The gear box part is formed by the worm gear, stroke adjusting mechanism and crank connecting rod mechanism; to execute high stroke adjustment by rotating the hand wheel adjustment, thereby changing the eccentric shaft from the movement to change the plunger (piston) to travel.

Cylinder parts are composed of pump head, suction valve group, exhaust valve group, plunger and packing seal.

Working principle

Motor driven by coupling through the worm and worm gear of the spindle and the eccentric rotation rotary motion, slide the bow rod by the eccentric wheel regulating for reciprocating motion seat. When the plunger moves backward dead point, gradually forming a vacuum pump chamber, suction valve open, the inhalation of the liquid; when the plunger moves forward dead, when the suction valve is closed, the discharge valve is opened, the liquid discharge in the piston to further movement. A continuous pressure and quantitative discharge liquid is formed in the reciprocating direction of the pump.

Flow regulation

The flow adjustment of the metering pump is to adjust the rotation of the screw by rotating the handwheel, thus changing the distance between the bow shaped connecting rod, changing the piston (piston) moving stroke in the pump cavity to determine the size of the flow. Adjusting the handwheel scale determines the plunger stroke, the accuracy rate is 95%.