Explanation of knowledge and principles of solenoid valves

The working principle of an electromagnetic valve is that there is a sealed chamber inside the valve, with through holes at different positions. Each hole leads to a different oil pipe. In the middle of the chamber is a valve, and there are two electromagnets on both sides. The magnetic coil on which side is energized will be attracted to which side of the valve body. By controlling the movement of the valve body, different oil discharge holes can be blocked or leaked, and the oil inlet hole is usually open, and hydraulic oil will enter different oil discharge pipes, Then, the pressure of the oil is used to push the piston of the oil cylinder, which in turn drives the piston rod, which drives the mechanical device to move. In this way, mechanical motion is controlled by controlling the current of the electromagnet.

Classification:

The electromagnetic valves at home and abroad are divided into three categories in principle (namely direct acting, step by step direct acting, and pilot operated), and are divided into six sub categories based on the differences in valve disc structure, material, and principle (direct acting diaphragm structure, step by step heavy plate structure, pilot membrane structure, direct acting piston structure, step by step direct acting piston structure, and pilot piston structure). They are divided into 2-position 2-way, 2-position 3-way, 2-position 4-way, and 2-position 5-way according to the number of gas paths.

Electromagnetic valves are divided into single electronic control and dual electronic control, which refer to the number of electromagnetic coils. Single coil is called single electronic control, while double coil is called double electronic control. 2-position 2-way, 2-position 3-way is generally single electronic control (single coil), 2-position 4-way, and 2-position 5-way can be single electronic control (single coil) or double electronic control (double coil).