Method and device for starting pump

A device for starting a pump, which includes a runner;

• a runner driving device;
• a runner chamber housing therein said runner;
• a plurality of openable guide vanes provided along the outer periphery of said runner chamber;
• a casing surrounding said guide vanes;
• a discharge tube coupled to said casing;
• a main valve;
• a by-pass valve, said main valve and said by-pass valve being provided in said discharge tube;
• a drain valve discharging from said runner chamber leaking water introduced therein;
• a compressed air supply valve connected to said runner chamber;
• an exhaust valve for discharging compressed air from the runner chamber;
• and a leaking water supply valve connected to said casing, comprising:
• means for sequentially closing said main valve, said by-pass valve and said plurality of guide vanes according to a prescribed pump-starting instruction;
• means for opening said leaking water supply valve and said air supply valve due to the closure of said guide vanes, said leaking water supply valve feeding leaked water to said casing, and said air supply valve feeding air to said runner chamber;
• means for detecting and controlling the water level in said runner chamber, said means detecting the level of water in said runner chamber and closing said air supply valve when the level of water in said runner chamber reaches a given water level, said means opening and closing in proper timing said air supply valve, thereby maintaining the water level in said runner chamber at a given level in the stages succeeding thereto, and said means actuating said runner driving device which rotates said runner in the direction of pump action;
• r.p.m. detecting means for detecting that said runner reaches a specified r.p.m.;
• means for closing said drain valve as well as said air supply valve when said r.p.m. detecting means has detected the specified r.p.m. of the runner;
• means for opening said exhaust valve to discharge air from the runner chamber when said drain valve has been closed;
• means for opening said by-pass valve as well as closing said exhaust valve and said leaking water supply valve according to the variation in water pressure in the vicinity of the runner;
• and
• means for sequentially opening said main valve and said plurality of guide vanes when said by-pass valve has been brought into a full open position.

A device for starting a pump, which includes a runner;

• a runner driving device;
• a runner chamber housing therein said runner;
• a plurality of openable guide vanes provided along the outer periphery of said runner chamber;
• a casing surrounding said guide vanes;
• a discharge tube coupled to said casing;
• a main valve;
• a by-pass valve, said main valve and said by-pass valve being provided in said discharge tube;
• a drain valve discharging from said runner chamber leaking water introduced therein;
• a compressed air supply valve connected to said runner chamber;
• an exhaust valve for discharging compressed air from the runner chamber;
• and a leaking water supply valve connected to said casing, comprising;
• means for sequentially closing said main valve, said by-pass valve and said plurality of guide vanes according to a prescribed pump-starting instruction;
• means for opening said leaking water supply valve and said air supply valve when said plurality of guide vanes have been closed, said leaking water supply valve feeding water to said casing, and said air supply valve feeding air to said runner chamber;
• an air compressor for feeding compressed air by way of said air supply valve to said runner chamber;
• water-level detecting and controlling means for detecting the level of water in said runner chamber and closing said air supply valve when the level of water in said runner chamber reaches a given water level, and for opening and closing, in proper timing, said air supply valve, for maintaining the level of water in said runner chamber constant in the stages succeeding thereto, and for actuating said runner driving device which rotates said runner in the direction of pump action;
• r.p.m. detecting means for detecting that said runner reaches a specified r.p.m.;
• means for closing said drain valve as well as closing said air supply valve when said r.p.m. detecting means detects the specified r.p.m. of the runner;
• means for opening said exhaust valve when said drain valve is closed, to discharge air from the runner chamber;
• a timer adapted to be actuated for a given period of time when said exhaust valve has been opened;
• and
• means for properly opening said by-pass valve, said main valve and said plurality of guide vanes as well as closing said leaking water supply valve and said exhaust valve according to the actuation of said timer.