Hydraulic turbine inlet hydraulic butterfly valve

Hydraulic turbine inlet hydraulic butterfly valve

The hydraulic turbine inlet hydraulic butterfly valve is a new product developed by our company after digesting and absorbing the structure of foreign advanced products and domestic market research, in accordance with the requirements of GB/T14478 "Basic Technical Requirements for Large and Medium-sized Turbine Inlet Valves". The whole equipment includes upstream extension pipe, inlet hydraulic butterfly valve, inlet valve expander, downstream extension pipe, bypass pipeline, bypass pipeline control valve and bypass pipeline maintenance valve, air valve, etc. Ideal equipment for cutting off or connecting media in pipeline systems.

Purpose

1. When the water turbine unit accidentally escapes, the water inlet hydraulic butterfly valve is closed by emergency water to protect the safety of the unit;

2. In a hydropower station with one tube and multiple units, when a unit fails to be repaired, the water inlet hydraulic butterfly valve in front of the unit can be closed to perform the repair work without affecting the normal operation of other units;

3. When the unit is shut down for a long time, closing the water inlet hydraulic butterfly valve can reduce the unit's peristalsis and reduce the startup time.

Features

1. The valve body and valve are formed by casting and welding. The exterior of the valve body adopts a T-shaped reinforced structure, and the valve adopts a double-plate frame structure or a streamlined structure, which has high strength and good rigidity. The inlet and outlet parts adopt diversion or streamline design, with good hydraulic characteristics, and the flow resistance coefficient through the inlet hydraulic butterfly valve is less than 0.2;

2. The rubber soft seal adopts a double eccentric structure, and the metal hard seal adopts an all-metal elastic metal seal structure.

Make full use of the hydraulic self-closing characteristics of the hydraulic butterfly valve to ensure the reliability of valve closing under any working conditions;

3. The fluid energy of the accumulator or the potential energy of the heavy hammer drives the servomotor of the hydraulic butterfly valve to open or close the hydraulic butterfly valve; the pressure holding performance of the hydraulic system is good, the valve is opened or closed according to the preset procedure, and the valve is opened or closed. The whole process of the valve is controllable (the hydraulic system can be designed with multiple pressure levels for users to choose).

4. The operating mechanism adopts a rotary servomotor structure or a straight cylinder swing servomotor. The mechanical stroke limit mechanism and electrical control mechanism of the rotary servomotor and the box body of the operating mechanism are integrated into an independent control unit, which is extremely convenient for installation, debugging and maintenance; the cable socket on the box body is very convenient for control with the electrical control cabinet Cable connection, beautiful wiring; straight cylinder swing type servomotor has a large output torque, but it is troublesome to install and debug; two operating mechanisms for users to choose;

5. It adopts PLC control, simple circuit, high reliability, complete communication interface, complete man-machine communication function and fault self-diagnosis function; it can be operated on site or remotely through the electrical control cabinet, which is easy to realize the hydraulic turbine unit Interlocking program control and microcomputer centralized control with hydraulic butterfly valve;

6. Set hydraulic lock and mechanical lock at the valve closing position. The mechanical lock is used to prevent accidents caused by misoperation of the hydraulic butterfly valve during maintenance of the turbine. The valve opening position can be determined according to user requirements whether to set hydraulic lock.

7. The hydraulic station and electrical control cabinet are separated from the water inlet hydraulic butterfly valve and installed nearby; the hydraulic station is connected to the servomotor and locking cylinder of the hydraulic butterfly valve through pickled seamless steel pipes and hoses.