The function of pneumatic valve solenoid valve, the working principle of pneumatic valve solenoid valve

The role of pneumatic valves and solenoid valves Pneumatic valves are the most common fluid control equipment in industrial pipelines. They are mainly composed of pneumatic actuators and valves. They drive the valves by compressing clean air to control the flow and shutoff of pipeline media, and perform Very fast and usually used for quick cutting off. Pneumatic valves are usually equipped with various accessories, such as solenoid valves, air source treatment triplet, limit switches, positioners, control boxes, etc., to achieve local control and remote centralized control. For a two-position valve that only requires opening and closing functions, a solenoid valve is a necessary configuration. The solenoid valve controls the opening/closing of the pneumatic valve through excitation/demagnetization. In terms of the gas line (or liquid line), the two-position three-way solenoid valve has 1 air inlet (connected to the air source), 1 air outlet (provided to the target equipment air source), and 1 exhaust hole ( Generally, a muffler is installed, but you don’t need to install it if you are not afraid of noise. The two-position five-way solenoid valve has 1 air inlet (connected to the air source), 1 forward action air outlet and 1 reaction air outlet (provided respectively for The target equipment has one forward and one reverse action air source), one forward action exhaust hole and one reverse action exhaust hole (installed with a silencer). For small automatic control equipment, the air pipe generally uses 8~12mm industrial rubber air pipe. Pneumatic valve solenoid valve working principle Electrically speaking, the two-position three-way solenoid valve is generally single-electronic control (i.e., single coil), and the two-position five-way solenoid valve is generally dual-electronic control (i.e., double coil), and the coil voltage level is average. It adopts DC24V, AC220V, etc. The two-position three-way solenoid valve is divided into two types: normally closed type and normally open type. Normally closed type means that the air path is open when the coil is not energized, and normally open type means that the air path is open when the coil is not energized. 1. The operating principle of the normally closed three-position solenoid valve: energize the coil and connect the air circuit. Once the coil is powered off, the air circuit will be disconnected, which is equivalent to "jogging". The action principle of the two-position three-way single solenoid valve: energize the coil and the air circuit is disconnected. Once the coil is deenergized, the air circuit will be connected. This is also the "pointing" action of the two-position five-way double solenoid valve. Principle: When the forward action coil is energized, the forward action air path is connected (there is air in the forward action air outlet). Even if the forward action coil is powered off, the forward action air path is still connected and will remain open until the reverse action is given. Until the coil is energized. When the reaction coil is energized, the reaction air path is connected (there is air in the reaction outlet). Even after the reaction coil is deenergized, the reaction air path is still connected and will remain open until the reaction coil is energized. Until the action coil is energized. This is equivalent to "self-locking" (the so-called memory function). Based on this characteristic of the two-position five-way double electric control solenoid valve, the solenoid can be used when designing the electromechanical control circuit or programming the PLC. It only takes 1 to 2 seconds for the valve coil to operate, which can protect the solenoid valve coil from being easily damaged. Single solenoid valve controls the movement of the valve core by controlling the current on and off of the solenoid coil and the action of the spring. Opening and closing of the control valve: The coil on the right side is energized, and the spring on the left side is compressed: The coil on the right side is deenergized, and the spring on the left side extends: Dual-electronic control schematic diagram The dual-electronic control solenoid valve is energized by the electromagnetic coils on both sides. When one coil loses power, the valve core can be kept motionless when the other is not powered, which is called a valve with memory function. The above is the function of the pneumatic valve solenoid valve, and the working principle of the pneumatic valve solenoid valve. Introduction, if you want to know more related information, please log in to www.diancifa.cc to view the Dianwei Pneumatic.