Introduction to the common sense theory of the three - pass solenoid valve of the two - way solenoid valve

Introduction of solenoid valve
The operation principle of solenoid valve, a closed cavity in the solenoid valve, open holes in different azimuth, each hole leading to the different oil pipe, the center of the cavity is the valve, the double side is two electromagnets, which the magnet coil body will be attracted to the side, through the manipulation of the valve movement to file or leaks out the different rows. The hole in the oil, and the oil hole is often open, the hydraulic oil will enter the different exhaust pipe, and then through the pressure of oil to advance the oil rigid piston, the piston also drives the piston rod, the piston rod drives the mechanical equipment. So manipulating the current of the electromagnet controls mechanical movement.
Classification:
The electromagnetic valves at home and abroad are divided into three major categories (i.e., direct moving, stepwise direct motion, and pilot), and the differences in the valve structure and the data are divided into six branches (direct moving diaphragm structure, stepwise heavy slice structure, pilot membrane structure, direct moving piston structure, and stepwise direct piston structure). The pilot piston structure is divided into 2 bit 2 links, 2 bit 3 links, 2 bit 4 links, 2 bit 5 buses according to the number of gas paths. The solenoid valve is divided into single electronic control and double control, which refers to the number of electromagnetic coils. Single coil is called single electronic control, double coil is called double control, 2 bit 2 pass, 2 bits and 3 pass is usually single electronic control (Dan Xianquan), 2 position 4, 2 bit 5 can be single electronic control (Dan Xianquan), and also can be double electric control (double coil).
1. The solenoid valves can be divided into electromagnetic valves, air solenoid valves, steam electromagnetic valves, gas electromagnetic valves, oil solenoid valves, fire fighting solenoid valves, refrigeration solenoid valves, anticorrosive electromagnetic valves, high temperature solenoid valves, high pressure solenoid valves, pressure free solenoid valves, and super solenoid valves. Low temperature solenoid valve (cryogenic solenoid valve), vacuum solenoid valve and so on.
Two. According to the internal structure of solenoid valve, it can be divided into pilot type, direct type, compound type, recoil type, self insisting type, pulse type, bistable state, bidirectional type, etc.
Three, the use of electromagnetic valves can be divided into: cast iron (gray cast iron, spheroidal graphite cast iron), copper (cast copper, forged copper), cast steel, all stainless steel (304, 316), non metal data (ABS, polytetrafluoroethylene).
Four. The pressure of the medium in the pipe can be divided into vacuum (-0.1~0Mpa), low pressure (0~0.8Mpa), medium pressure (1.0~2.5Mpa), high pressure (4.0~6.4Mpa), and ultra high pressure (10~21Mpa).
Five, according to the different temperature of the medium, it can be divided into: normal temperature type (~), medium temperature type (~), high temperature type (~), ultra high temperature type (~), low temperature type (~), ultra low temperature type ().
Six, according to the operating voltage is not the same as: AC voltage: AC220V 380V 110V 24V; DC voltage: DC24V 12V 6V 220V; commonly used voltage is AC220V DC24V, recommended users try to choose common voltage, special voltage supply cycle longer.
Seven, according to the protection level of solenoid valves can be divided into: explosion-proof, waterproof, outdoor type and so on.
From the principle:
Direct actuated solenoid valve:
Principle: when electrifying, electromagnetic coil produces electromagnetic force to lift closed parts from the seat and open the valve; when the power is broken, the electromagnetic force is out of sight, the tension spring puts the seal on the seat and the valve is closed.
Features: it can work normally in vacuum, negative pressure and zero pressure, but the path usually does not exceed 25mm.