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Solenoid valve core material is applied in the field of air separation

We first have a preliminary understanding of the electromagnetic valve core material, solenoid valve core material is composed of electromagnetic coil and magnetic core, is a valve body containing one or several holes. When the coil is energized or de-energized, 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 electromagnetic core material of the electromagnetic valve are composed of fixed iron cores, moving iron cores, and coils; the valve body is composed of a slide valve core, a slide valve cover, and a spring base. The solenoid coil is directly mounted on the valve body, and the valve body is enclosed in a sealed tube to form a compact, compact combination. The commonly used electromagnetic valve iron core material in our production has two three-way, two-position four-way, two-position five-way and so on. Here to talk about the meaning of the two: For the solenoid valve core material is charged and lose power, for the control of the valve is to open and close.
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In our oxygen concentrator machine control system, the two-position three-way solenoid valve core material is the most used. It can be used to switch on or off the gas source during production, thus switching the pneumatic control membrane head gas path.

It consists of valve body, valve cover, electromagnetic assembly, spring and sealing structure and other components. The sealing block at the bottom of the moving iron core closes the air inlet of the valve body by the pressure of the spring. After the power is turned on, the electromagnet pulls in, and the seal block with the spring on the upper part of the moving iron core closes the air outlet, and the air flow enters the membrane head from the air inlet to play a control role. When the power is lost, the electromagnetic force disappears, the moving iron core leaves the fixed iron core under the action of the spring force, moves downwards, opens the exhaust port, blocks the air inlet, and the film head air discharges through the exhaust port, and the diaphragm recovers. Original location. In our oxygen plant, there are applications for the emergency shut-off of the diaphragm inlet valve of the turboexpander.

Four-way solenoid valve iron core material has many applications in our production, and its working principle is as follows:

When a current passes through the coil, excitation occurs, and the fixed iron core attracts and moves the iron core. The moving iron core drives the slide valve core and compresses the spring, which changes the position of the slide valve core, thereby changing the direction of the fluid. When the coil is de-energized, the slide valve core is pushed by the elastic force of the spring, and the core is moved back to move the fluid in the original direction. In our oxygen production, the switch of the forced-action valve of the molecular sieve switching system is controlled by the two-position four-way electromagnetic valve core material, and the air flow is supplied to both ends of the piston of the forced valve. In order to control the opening and closing of the forced valve. The failure of the electromagnetic valve core material will directly affect the action of the switching valve and the regulating valve. The common failure of the electromagnetic valve core material does not work, should be investigated from the following aspects:

(1) Solenoid valve iron core material loose or thread head off, solenoid valve core material must not be electricity, can be fastened thread.
(2) Solenoid valve core material coil burned out, can remove the solenoid valve core material wiring, with a multimeter to measure, if open, then the solenoid valve core material coil burned. The reason is that the coil is damp, causing poor insulation and magnetic flux leakage, causing the current in the coil to be too large and being burned. Therefore, it is necessary to prevent rainwater from entering the core material of 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 insufficient to make the coil burn out. In emergency handling, the manual button on the coil can be switched from the "0" position to the "1" position during normal operation so that the valve opens.

(3) Solenoid valve core material stuck. The gap between the sliding valve sleeve and the valve core of the electromagnetic valve core material is very small (less than 0.008mm), which is generally a one-piece assembly. When there is mechanical impurities or too little lubricant, it is easy to get stuck. The treatment method can use steel wire to invade from the head hole to make it rebound. The fundamental solution is to remove the core material of the solenoid valve, remove the valve plug and the valve plug sleeve, and clean it with CCI4, which makes the valve plug move flexibly in the valve sleeve. When disassembling, attention should be paid to the assembly sequence of the components and the external wiring positions in order to re-assemble and connect correctly. Also check whether the oil spray hole of the oil mister is blocked and whether the lubricant is sufficient.

(4) leak. Leakage can cause insufficient air pressure, making it difficult to open and close a forced valve due to damage to the gasket or sliding valve wear resulting in several cavities.

When dealing with the malfunction of the solenoid valve core material of the switching system, an appropriate timing should be selected. When the solenoid valve core material is in a loss of power, the processing is performed. If the processing cannot be completed within a switching gap, the switching system can be suspended. deal with.

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