| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a safety valve control device which can avoid an anxiety of metallic contamination and can fully open a valve when steam pressure reaches a predetermined level or higher even if the flow of discharge steam at the beginning of blasting is small. <P>SOLUTION: The safety valve control device 1 includes a steam safety valve 2 into which steam generated by a steam generator 30 is introduced, an air supply device 4 for supplying air into the air chamber for the air storage of the pneumatic steam safety valve 2 to pressurize the inside of the air chamber, a vent valve 5 which communicates with the air chamber, and vents the air chamber to air when opened and does not vent the air chamber to the air when closed, a discharge steam temperature sensor 3 for measuring the temperature of the steam discharged from the steam safety valve 2, and a vent valve control part 6 for venting the vent valve 5 based on the temperature of the steam measured by the discharge steam temperature sensor 3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
