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Solenoid Control Effect
Oct 19, 2017

We first have a preliminary understanding of the solenoid valve, Solenoid solenoid valve is composed of electromagnetic coil and core, is one or several holes containing the valve body. When the coil is energized or de-energized, the operation of the core will cause the fluid to pass through the valve body or be cut off to achieve the purpose of changing the direction of the fluid. The electromagnetic part of the solenoid valve consists of fixed iron core, moving iron core, coil and other components; the valve part of the valve spool, Solenoid slide sleeve, spring base and other components. The solenoid is mounted directly on the valve body and the valve body is enclosed in a sealed tube to form a simple, compact combination. We used in the production of the solenoid valve has two three links, two four, two five and so on. Here first talk about the meaning of the two: for the solenoid valve is charged and lost power, for the control of the valve is open and closed.

Our oxygen machine control system, the two-way three-way solenoid valve with the most, it can be used to produce or cut off the gas source, so as to pneumatic control membrane head gas switch.

It consists of valve body, Solenoid valve cover, electromagnetic components, spring and sealing structure and other components, moving the bottom of the core block with the spring pressure of the valve body inlet closed. After the power, the electromagnet pull, move the upper part of the core with a spring block to close the exhaust port, air from the inlet into the membrane head, play a control role. When the power loss, the electromagnetic force disappears, moving core under the action of the spring force to leave the fixed core, move down, the exhaust port to open, blocking the air inlet, membrane head gas flow through the exhaust port, Solenoid diaphragm recovery The original location. In our oxygen equipment, in the turboexpander imported membrane control valve emergency cut off, etc. have been applied.

Solenoid valve coil burned, can remove the solenoid valve wiring, with a multimeter to measure, if open, then the solenoid valve coil burned. Because there is a coil damp, causing poor insulation and leakage of magnetic, resulting in coil current is too large and burned, Solenoid so to prevent the rain into the solenoid valve. In addition, the spring is too hard, the reaction force is too large, too few turns of the coil, suction can also make the coil burned. In case of emergency treatment, the manual button on the coil can be hit by the "0" bit in normal operation to the "1" position, so that the valve opens.

Solenoid valve stuck. Solenoid valve slide valve sleeve and spool with a small gap (less than 0.008mm), are generally single-piece assembly, when there are mechanical impurities into or less oil, it is easy to stuck. Treatment method can be used to pull the wire from the head hole, so that it bounced back. The fundamental solution is to remove the solenoid valve, remove the spool and spool sleeve, with CCI4 cleaning, Solenoid making the spool in the valve sleeve action is flexible. Disassembly should pay attention to the assembly of the parts and the external wiring position, so that re-assembly and wiring is correct, Solenoid but also check the oil mist spray hole is blocked, the oil is sufficient.

Leakage. Leakage can cause insufficient air pressure, making the forced valve opening and closing difficult, because the gasket is damaged or spool valve wear caused by a few cavity channeling gas.

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