Introduction - Heavy hammer type butterfly pneumatic valve guide new technology application

, the technical principle of

heavy hammer type pneumatic valve by adjusting the pneumatic butterfly valve body, hydraulic linkage by ventilation valve, manual oil pump, a heavy hammer, release device ( Or electric pump, rack drive oil cylinder, electronic control parts, etc. By pressure oil pump type rack transmission oil cylinders, the pistons on the rack to move the gear on the disc spindle rotates to open butterfly plate, and to lift the heavy hammer on the coaxial to high. Heavy hammer on the pawl through release the lock on the spindle lock spindle; Lock the spindle fixed by electromagnet and bracket device to control. When the accident happened, due to the electronic control part of the action, electromagnet and electricity lock spindle out of control, under the weight of a heavy hammer pivoting tripping and make adjustment pneumatic valve automatically shut down.

the butterfly pneumatic valve of the hydraulic system, using two stage throttling to control the rate of butterfly pneumatic valve closed, closed faster at the beginning, in order to reduce the rate of sustained and speed time up; After phase closed slowly to control the water pressure rising rate.

, technical features and main technical parameters of the

. Technical characteristics of the

the flashlight dual-use hydraulic system with the whole machine assembly, make the machine has compact structure, easy to operate.

in the absence of external power supply, can use gravity energy storage to shut off on its own. When units tachycardia, bearing overheating and can automatically shut down when the generator field loss, thus for the automatic protection unit. How two closed characteristics. The locking mechanism controlled by electromagnet of both safe and reliable, operation and small.
　　
. Main technical parameters and index

to a D - Adjustment of heavy hammer type pneumatic valve as an example, the main technical data: pressure, MPa; Diameter, phi, phi phi, phi phi phi; The highest use head, m; The highest pressure head, m; Open time, manual min or so, electric min or so; Closing time, fast in the period of ~ s; Slow in the period of ~ s; The scope of protection of the tachycardia. Times the rated speed ( Is adjustable.

location, specific application and effect of

zhejiang linhai city Chai Tan hydropower station adopts pingyang county of zhejiang province hydropower equipment factory production of two DX - automatically Heavy hammer type pneumatic valve adjustment. Free-flow tunnel m, power station type for the hybrid, the hole diameter. Length m m, pressure, pipe diameter. M, design head. M, m, the highest head design flow. M/s, turbine - HL WJ - SFW - A, generator - / ( Reactance shunt excitation, V rated voltage, rated capacity kW, rated speed r/min. (date) (month) (year) into the electricity grid to years, double h combined machine. Heavy hammer pneumatic valve running in good condition, evaluation as follows: ( Equipment action correctly, realize the safety in production, two butterflies pneumatic valve open time, closing time, movement accuracy %; ( Electric open is the average time for s, fast closing time setting load rejection for s, fast to reduce the speed rate of climb first, control the rate of climb within a %, slow close time setting for the s, after slow is to reduce the water pressure rising rate, control the rate of climb within a %; ( In the process of forced outage unit tachycardia, when more than. Times the rated speed, the speed sensor to the, heavy hammer automatic tripping off inlet pneumatic valve and prevent accident from expanding, increased the operation security.

and epilogue

in the first place, to improve the reliability of equipment operation, ensure the safety shutdown. Second, reduce the labor intensity of the operating workers, reducing the workload of maintenance. Reduce the personnel on duty for two units, austerity about ten thousand yuan a year.

in addition, the pneumatic valve in unmanned ( Less people on duty when lost in the grid power station or isolated auxiliary power tripping heavy hammer shut down automatically, without the standby dc operation power supply. Gb safety pneumatic valve, pneumatic valve, stainless steel security safety mini rev type pneumatic valve, pneumatic air safety with safety valve, ammonia pneumatic valve, pneumatic valve, liquefied petroleum gas (LPG) security all rev type pneumatic safety valve, all copper pneumatic safety valve pneumatic valve, etc. Series security products.

in some power station design, if the designated units GD and under the condition of hydraulic structure layout, unable to find a suitable on the guide vane closing time to ensure that the unit rate of appreciation and water pressure on the appreciation are not exceed the standard value, and this can take 2 of heavy hammer type pneumatic valve adjusting speed closed, fast and reduce speed increases first, after a slow and can reduce the water pressure. This method than setting artificial resistance, reliable than setting up surge tank of the economy.