Rexroth solenoid valve is composed of valve body, valve cover, electromagnetic assembly, spring and sealing structure.
After the power is turned on, the electromagnet is pulled in, the sealing block with a spring on the upper part of the moving iron core closes the exhaust port, and the airflow enters the membrane head from the air inlet, which plays 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 down, opens the exhaust port, blocks the air inlet, the air flow of the membrane head is discharged through the exhaust port, and the diaphragm recovers. original location. In our oxygen production equipment, it is used in the emergency cut-off of the X-film regulating valve of the turboexpander.
Rexroth four-way solenoid valve is also widely used in our production.
Its working principle is as follows: when a current passes through the coil, an excitation effect is generated, the fixed iron core attracts the moving iron core, and the moving iron core drives the spool and compresses the spring. Changes the position of the spool, thereby changing the direction of the fluid. When the coil is de-energized, the spool valve core is pushed by the elastic force of the spring, and the iron core is completely reversed, so that the fluid flows in the original direction. In our oxygen production, the switch of the forced valve of the molecular sieve switching system is controlled by a two-position four-way solenoid valve, and the airflow is supplied to both ends of the piston of the forced valve. So as to control the opening and closing of the forced valve.