Common faults and solutions of Manifold Block solenoid valve
Before has introduced in detail “solenoid valve working principle and classification”, “solenoid directional valve structure detailed explanation”, “solenoid valve selection and installation precautions”, now to introduce the solenoid valve common faults and solutions.
The solenoid valve is composed of electromagnetic coil and magnetic core, is a body containing one or several holes. When the coil is energized or powered off, the operation of the magnetic 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 components of the solenoid valve are composed of fixed iron core, moving iron core, coil and other components; The valve body part is composed of slide valve core, slide valve sleeve, spring base, etc. The electromagnetic coil is mounted directly to the body, which is enclosed in a sealing tube, forming a simple and compact combination. We are commonly used in the production of solenoid valve two three, two four, two five, and so on. Here is the meaning of two: for the solenoid valve is charged and lost electricity, for the control of the valve is on and off.
The failure of the solenoid valve will directly affect the action of the switching valve and the regulating valve. Common faults include the failure of the solenoid valve, which should be investigated from the following aspects:
1, solenoid valve wiring head loose or wire off, solenoid valve shall not be electric, can tighten the wire.
2, the solenoid valve coil burned out, can remove the solenoid valve wiring, with a multimeter measurement, if open, the solenoid valve coil burned out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing the coil current is too large and burned, so to prevent rain into the solenoid valve. In addition, the spring is too hard, the reaction force is too large, the number of turns of the coil is too small, and the suction is not enough to burn the coil. During emergency handling, the manual button on the coil can be hit from “0” to “1” in normal operation to make the valve open.
3, solenoid valve stuck: solenoid valve slide valve sleeve and spool with a small gap (less than 0.008mm), is generally a single assembly, when there are mechanical impurities into or too little lubricating oil, it is easy to stuck. The processing method can be used to poke steel wire through the hole of the head to make it bounce back. The fundamental solution is to remove the solenoid valve, take out the spool and the spool sleeve, clean with CCI4, so that the spool is flexible in the valve sleeve. When disassembling, attention should be paid to the assembly sequence and external wiring position of each component, so that the reassembly and wiring are correct, but also to check whether the oil spray hole of the oil mist is blocked, whether the oil is enough.
4, leakage: leakage will cause insufficient air pressure, making the opening and closing of the forced valve difficult, the reason is that the sealing gasket damage or slide valve wear caused by several cavity channeling. When dealing with the solenoid valve failure of the switching system, the appropriate time should be selected, such as the solenoid valve is in the loss of power to deal with, if in a switching clearance processing can not be finished, the switching system can be suspended, calmly deal with.