Protection device for turbine exhaust chamber and condenser and monitoring controller for turbine exhaust chamber and condenser

Abstract

There is provided a protection device for a turbine exhaust chamber and a condenser, having, a condenser, a turbine exhaust chamber casing covering the steam turbine and the condenser, an atmosphere discharge disc for discharging atmosphere when a pressure reaches a first predetermined value, a temperature measuring unit for measuring a temperature in the turbine exhaust chamber casing, a first setter for setting a second predetermined value, an output unit for producing an external output, based on the measured temperature and the second predetermined value, when a pressure corresponding to the temperature becomes higher than or equal to the second predetermined value related to pressure or when the temperature becomes equal to or higher than the second predetermined value related to temperature, and a releasing unit for releasing the steam in the turbine exhaust chamber casing to an exterior when the output unit produces the external output.

1 . A protection device for a turbine exhaust chamber and a condenser comprising:
 a condenser for cooling and condensing steam exhausted from a steam turbine;   a turbine exhaust chamber casing integrally covering the steam turbine and the condenser;   an atmosphere discharge disc for discharging atmosphere when a pressure in the turbine exhaust chamber casing reaches a first predetermined value;   a temperature measuring means for measuring a temperature in the turbine exhaust chamber casing;   a first setter for setting a second predetermined value;   an output means for producing an external output, based on the temperature measured by the temperature measuring means and the second predetermined value set by the first setter, when a pressure corresponding to the temperature becomes higher than or equal to the second predetermined value related to pressure or when the temperature becomes equal to or higher than the second predetermined value related to temperature; and   a releasing means for releasing the steam in the turbine exhaust chamber casing to an exterior when the output means produces the external output.   
     
     
         2 . A protection device for a turbine exhaust chamber and a condenser according to  claim 1 ,
 wherein the output means includes   a converter to which the temperature measured by the temperature measuring means is given and which converts the temperature into a corresponding pressure and outputs the pressure, and   a comparator for comparing the pressure obtained by conversion by the converter and the second predetermined value related to the pressure and set in the first setter and producing an output when the pressure becomes higher than or equal to the second predetermined value.   
     
     
         3 . A protection device for a turbine exhaust chamber and a condenser according to  claim 2 , wherein the second predetermined value related to the pressure and set in the first setter or the pressure corresponding to the second predetermined value related to the temperature and set in the first setter is a lower value than the first predetermined value. 
     
     
         4 . A protection device for a turbine exhaust chamber and a condenser according to  claim 2 , wherein the second predetermined value related to the pressure and set in the first setter or the pressure corresponding to the second predetermined value related to the temperature and set in the first setter is positive pressure or higher. 
     
     
         5 . A protection device for a turbine exhaust chamber and a condenser according to  claim 1 , wherein the output means includes a comparator for comparing the temperature measured by the temperature measuring means and the second predetermined value related to temperature and set in the first setter and producing an output when the temperature becomes higher than or equal to the second predetermined value. 
     
     
         6 . A protection device for a turbine exhaust chamber and a condenser according to  claim 5 , wherein the second predetermined value related to the pressure and set in the first setter or the pressure corresponding to the second predetermined value related to the temperature and set in the first setter is a lower value than the first predetermined value. 
     
     
         7 . A protection device for a turbine exhaust chamber and a condenser according to  claim 5 , wherein the second predetermined value related to the pressure and set in the first setter or the pressure corresponding to the second predetermined value related to the temperature and set in the first setter is positive pressure or higher. 
     
     
         8 . A protection device for a turbine exhaust chamber and a condenser according to  claim 1 , wherein the second predetermined value related to the pressure and set in the first setter or the pressure corresponding to the second predetermined value related to the temperature and set in the first setter is a lower value than the first predetermined value. 
     
     
         9 . A protection device for a turbine exhaust chamber and a condenser according to  claim 1 , wherein the second predetermined value related to the pressure and set in the first setter or the pressure corresponding to the second predetermined value related to the temperature and set in the first setter is positive pressure or higher. 
     
     
         10 . A protection device for a turbine exhaust chamber and a condenser according to  claim 1 , wherein the releasing means is a vacuum breaker valve provided to a pipe connecting an inside and an outside of the condenser and driven by a direct-current power supply. 
     
     
         11 . A protection device for a turbine exhaust chamber and a condenser according to  claim 1  and further comprising:
 a second setter for setting a third predetermined value; and 
 an alarm means for outputting an alarm, based on the temperature measured by the temperature measuring means and the third predetermined value set in the second setter, when the pressure corresponding to the temperature becomes higher than or equal to the third predetermined value related to pressure or when the temperature becomes higher than or equal to the third predetermined value related to temperature. 
 
     
     
         12 . A monitoring controller for a turbine exhaust chamber and a condenser comprising:
 a first setter for setting a first predetermined value; and   an output means for outputting an external output, based on a measured temperature in a turbine exhaust chamber casing integrally covering a condenser for cooling and condensing steam exhausted from a steam turbine and the steam turbine and the first predetermined value set by the first setter, when a pressure corresponding to the temperature becomes higher than or equal to the first predetermined value related to pressure or when the temperature becomes higher than or equal to the first predetermined value related to temperature.   
     
     
         13 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 12 ,
 wherein the output means includes   a converter to which the measured temperature in a turbine exhaust chamber casing is given and which converts the temperature into a corresponding pressure and outputs the pressure, and   a comparator for comparing the pressure obtained by conversion by the converter and the first predetermined value related to the pressure and set in the first setter and producing an output when the pressure becomes higher than or equal to the first predetermined value.   
     
     
         14 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 13 , wherein the first predetermined value related to the pressure and set in the first setter or the pressure corresponding to the first predetermined value related to the temperature and set in the first setter is a lower value than the first predetermined value. 
     
     
         15 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 13 , wherein the first predetermined value related to the pressure and set in the first setter or the pressure corresponding to the first predetermined value related to the temperature and set in the first setter is positive pressure or higher. 
     
     
         16 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 12 , wherein the output means includes a comparator for comparing the measured temperature in a turbine exhaust chamber casing and the first predetermined value related to temperature and set in the first setter and producing an output when the temperature becomes higher than or equal to the first predetermined value. 
     
     
         17 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 16 , wherein the first predetermined value related to the pressure and set in the first setter or the pressure corresponding to the first predetermined value related to the temperature and set in the first setter is a lower value than the first predetermined value. 
     
     
         18 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 12 , wherein the first predetermined value related to the pressure and set in the first setter or the pressure corresponding to the first predetermined value related to the temperature and set in the first setter is a lower value than the first predetermined value. 
     
     
         19 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 12 , wherein the first predetermined value related to the pressure and set in the first setter or the pressure corresponding to the first predetermined value related to the temperature and set in the first setter is positive pressure or higher. 
     
     
         20 . A monitoring controller for a turbine exhaust chamber and a condenser according to  claim 12  and further comprising:
 a second setter for setting a second predetermined value; and 
 an alarm means for outputting an alarm, based on the temperature measured by the temperature measuring means and the second predetermined value set in the second setter, when the pressure corresponding to the temperature becomes higher than or equal to the second predetermined value related to pressure or when the temperature becomes higher than or equal to the second predetermined value related to temperature.