Differential pressure type water level measuring device

摘要

PROBLEM TO BE SOLVED: To provide a water level measurement equipment of a differential pressure type capable of continuing operation with the other correct system even if an accident such as instrument trouble is caused, by eliminating the deviation between the regular system and the emergency system in the constitution of providing on either of regular system and emergency system with a level switch.;SOLUTION: The water level measurement equipment of the differential pressure type comprises: vapor phase detection piping 102; liquid phase detection piping 103; a vapor phase side diaphragm 114; the liquid phase side diaphragm 115; a regular differential pressure detection system of the differential pressure detector 120 for detecting the water level of drain water level of a vessel 101 from the difference of the vapor phase side pressure and the liquid phase side pressure; the emergency differential pressure detection system of same constitution; and the level switch 130 for alarming high water level outputting connected by the upper detection piping 121 and the lower detection piping 122 between the piping 102 mutually connected with the vapor phase detection piping, and piping 103 mutually connected with the liquid phase detection piping, wherein the length from the vapor discharge port to the pressure receiving surface of each vapor phase side diaphragm 114 and the length from the vapor discharge port to the pressure receiving surface of each vapor phase side diaphragm 114 and from the liquid discharge port to pressure receiving surface of each liquid side diaphragm 115 are made set equal.;COPYRIGHT: (C)2007,JPO&INPIT