Working principle
The reset solenoid valve MFZ3-90YC is mainly composed of electromagnetic coils, valve cores, valve seats, springs and other components. When the electromagnetic coil is energized, an electromagnetic field is generated, which generates suction on the iron core, causing the valve core to overcome the spring force and move, thereby changing the on-off state of the valve and controlling the flow of the fluid. When the power is disconnected, the electromagnetic field disappears, the iron core is reset under the action of the spring force, and the valve returns to its initial state.
Structural features
1. Compact design: The overall structure is relatively compact, which is easy to install on the relevant equipment of the steam turbine and can adapt to more complex spatial layouts.
2. Good sealing performance: Use high-quality sealing materials to ensure good sealing performance between the valve core and the valve seat to prevent fluid leakage, which is crucial to ensure the stability and reliability of the turbine hydraulic system.
3. Durable material: Usually made of wear-resistant and corrosion-resistant materials to withstand the high pressure, high temperature and fluid scouring during the operation of the turbine, extending the service life.
Function
1. Position reset: used to restore certain actuators or devices of the turbine from the working position to the initial or default position. For example, after the protection system of the turbine is activated, the relevant valves or mechanisms will move to a safe position, and the reset solenoid valve can return them to the initial position of normal operation to prepare for the next normal start or operation.
2. State reset: The state reset of the control device or system. When the turbine fails or specific conditions are met, such as overspeed, excessive vibration, etc., the protection system is activated. At this time, the reset solenoid valve can reset the state of the relevant system components to the initial state, so that after the fault is eliminated, the system can be put into operation normally.
3. Cooperate with the protection system: cooperate closely with other protection systems of the steam turbine. For example, after the emergency trip device is actuated, the reset solenoid valve can reset the trip device's hook under the operation of the operator or under specific conditions, creating conditions for re-establishing safe oil pressure, opening the main steam valve, and other operations.
Performance parameters
1. Working pressure: reset solenoid valve MFZ3-90YC can adapt to the working pressure range of the turbine hydraulic system to ensure normal operation under different working conditions.
2. Flow coefficient: according to the actual needs of the steam turbine, it has a suitable flow coefficient to ensure that the fluid can pass through the valve quickly and stably during the reset process to achieve rapid reset.
3. Response time: The response is fast, and the process from receiving the signal to realizing the valve action can usually be completed within [specific time], meeting the requirements of the turbine protection system for rapidity.
4. Electrical parameters: It has good electrical insulation performance and anti-interference ability to ensure stable operation in the electromagnetic environment of the power plant.
Reset solenoid valve MFZ3-90YC Details
