The hydraulic diaphragm metering pump is a type of metering pump, then the hydraulic diaphragm metering pump what are the structure, the hydraulic diaphragm metering pump born to now over how many years, here is a hydraulic diaphragm metering pump history.

Transmission mechanism

The motor power is transmitted to the worm and worm gear to realize speed rotation, crankshaft, connecting rod mechanism to reciprocate plunger hydraulic drive.

The stroke adjusting mechanism comprises a crank shaft, an eccentric wheel, an adjusting nut, an adjusting screw rod and an adjusting handwheel (handle), dial (pointer) and ruler, by changing the eccentricity relative to the plunger stroke.

Hydraulic system

The hydraulic system of hydraulic diaphragm metering pump, comprising a plunger piston, cylinder block and cylinder head, inlet and outlet valves, hydraulic diaphragm type valve and three (i.e., gas valve, valve, overload limit compensation valve). In the work, the diaphragm separates the hydraulic oil and the medium, so the hydraulic diaphragm type metering pump has the advantages of no leakage.

The plunger hydraulic diaphragm metering pump hydraulic end of the crank connecting rod mechanism of transmission of the reciprocating motion to drive. The plunger moves in the hydraulic chamber to make the hydraulic pressure change, and the hydraulic diaphragm displacement is used to transport the medium and the hydraulic oil in the hydraulic chamber

The relative stability is maintained by the function of the three valve.

It automatically discharged into the hydraulic chamber gas hydraulic oil overload valve and ensure the work smoothly, avoid excessive hydraulic oil or discharge pipe blocked produce overpressure valve to automatically open the overload protection purpose.

The limit compensation device is driven limit valve open with hydraulic diaphragm type, according to the degree of vacuum chamber hydraulic oil added at any time, to ensure the full hydraulic cylinder hydraulic oil.

Metering pump is widely used in petrochemical, chemical, electric power, water treatment, pharmaceutical and other industrial processes, for the quantitative transport of various chemical additives.

In 1936, the world's first motor driven metering pump was invented;

In 1939, Larry Wilson invented the Wilson chemical feed equipment - the world's first hydraulic drive diaphragm metering pump;

In 1963, the invention of the world's first electromagnetic drive metering pump -LMI;

In 1965, the invention of the world's first pneumatic metering pump -WILLIAMS.