The paper extraction check the functions and features of pneumatic valve

extraction check description: the role of the pneumatic valve and characteristic extraction check pneumatic valve is to be able to guarantee the safe operation of steam turbine, or technical personnel will be very dangerous when running the steam turbine. Because when the pressure inside the turbine suddenly reduce avoid caused by exhaust tube and each heater in steam backflow is more RPM high speed rotating turbine blade sudden reversal, causing the blade broken and damaged turbine malignant accidents; Pipeline leak and can prevent the heater system, the water from the bleed line into the steam turbine and water hammer accident.
extraction check pneumatic valve can reduce the pressure of steam turbine in suddenly, give a close to the power plant control system signal, and at the same time, the closing of the dynamic system can give a big torque, throughout the year. Seconds quickly close the pneumatic valve, to ensure the safety of the steam turbine. The function of the pneumatic valves conform to the state power company released from (date) (month) (year) to prevent power production requirements of the first major accident. 。 Provision of 'pump group must be able to quickly set off the extraction of quick close the pneumatic valve' requirements.
extraction check pneumatic valve design principle is important as a protection device must have high protective, SPEM extraction check pneumatic valve brand manifests the reliability of this characteristic. Use the best material and technology of the most advanced technology to ensure that our extraction check pneumatic valve is a superior and reliable pneumatic valve completely.
the role of a pneumatic valve, suction check:
extraction check pneumatic valve is used to protect the main function of steam turbine generator set special quick close the pneumatic valves, its role is to prevent the steam turbine unit in steam turbine load rejection internal pressure suddenly drops suddenly, extraction steam pipe and all kinds of heat exchanger steam caused inside pour into the steam turbine in many revolutions per minute high-speed rotating turbine blade suddenly hit the car running, and cause the turbine blade broken, destroy malignant accident of the steam turbine generator, and prevent the water heater system leaks in extraction steam piping into the steam turbine and water hammer accident.

extraction check pneumatic valve, suction check the structure characteristics of pneumatic valve:
, free oscillation of pneumatic disc; Pneumatic disc within the body cavity, to connect pin, in under the action of medium, can swing freely.
, automatically adjust the pneumatic valve and pneumatic disc LianBei; Pneumatic valve and pneumatic disc LianBei installation position can be adjusted.
and streamline the design of the pneumatic valve body; Pneumatic valve body cavity flow linear structure design, make the medium flow is smooth, does not produce eddy current.
and the outside lever; Deaden a linkage, easy to drive torque.
and power cylinder operation. Plus drive oil cylinder to ensure that the pneumatic valve shut down quickly, prevent the backflow medium.
and tilt the design of the pneumatic valve seat; Pneumatic valve seat sealing surface tilt Angle, the easier to pneumatic disc automatic reset, reliable sealing.
, balance shaft structure; External plus one balance shaft, make the medium flow smoothly, reduce pneumatic disc jitter and noise.