The manufacturer of the solenoid valve dosing machine explained that before the logic circuit was invented, the reagents in the flotation plant were added manually. With the help of the personal experience of the flotation workers, the opening of the medicament valve was manually controlled to regulate the flow and transportation of the flotation reagents. size.
In the 1960s, with the development of motor technology, American water conservancy engineer Asses Andruos used the waterwheel principle to create a scoop-type dosing machine. By adjusting the volume of the scoops on the scoop plate, the flow rate of the medicine can be changed.
But it is not enough to control the flow of flotation chemicals based on rotation. After the 1970s, solenoid valve dosing machines introduced that transistor-embedded integrated circuit microcontrollers were transferred from the military industry to civilian use, and large-scale production reduced costs. 1\/100 of the past, Canadian Jackjohns, a car mechanic and electronics enthusiast, built a logic circuit that can convert flow units into switching signals in his spare time. At a technical exchange meeting, American Fisher ( Taland, a technical engineer at FISHER Valve Company, learned about Jackjohns' flow-switch signal technology and applied it to the valve control industry by acquiring the technology;
Nowadays, with the rise of PLC programmable logic control machines (representing the brand Siemens), people can quickly build a multi-point solenoid valve switching signal control system with just a little knowledge of automation logic programming. This kind of The system is still used in some mining concentrators. Generally we call it: solenoid valve dosing machine (or gravity dosing machine).
