Patent DE-102009051931-A1 (DE)
Title: Method for early leak detection of cool water in a cooling device for cooling a continuous casting plant for the production of a cast metal strand, comprises detecting the pressure value of fluid by pressure sensor
Inventor: NAUJOCK ANDREAS
IPC: B22D11/22
Filed: 2009-11-04
Abstract: The method for early leak detection of cool water in a cooling device (1) for cooling a continuous casting plant for the production of a cast metal strand or blast furnace and/or electro furnace and in steel rolling plant such as equipment, machine, plant part or component protected against high temperature, with an inlet-side and outlet-side valve (9, 16), and/or inlet side pressure reading device, comprises operating the valve in remote control manner and detecting the pressure value of the fluid by pressure sensor (10, 15) in flow direction in inlet- and outlet. The method for early leak detection of cool water in a cooling device (1) for cooling a continuous casting plant for the production of a cast metal strand or blast furnace and/or electro furnace and in steel rolling plant such as equipment, machine, plant part or component protected against high temperature, with an inlet-side and outlet-side valve (9, 16), and/or inlet side pressure reading device, comprises operating the valve in remote control manner and detecting the pressure value of the fluid by pressure sensor (10, 15) in flow direction in inlet- and outlet, where the pressure value of the fluid is evaluated in a control- and evaluation unit under consideration of expectation value for the pressure of the fluid and is closed through a comparison with the expectation value for the pressure of the fluid on the existence of leakage. The valves are remotely controlled and operated by a central control- and evaluation unit. The pressure sensor measures the pressure corresponding to the physical characteristics of the fluid, where the temperature of the fluid is detected on determined place of the cooling device in the vicinity of the pressure sensor. The control- and evaluation unit controls the valve, and the measuring data such as pressure and temperature of the fluid receives in determined time point. The control- and evaluation unit compares the data with adjusted limited value, where the measured values lie within the tolerable boundary. The self-changing leakage is recognized related to a time period comparison and the information is transmitted to systems and/or to control- and evaluation unit. The control- and evaluation unit qualifies the determined results, and the tendency diagnoses from the qualified result. The pressure losses are recorded as a result of the gradual adding or the calcification of tubes within the cooling device and are considered both in ascertainment of a slinking tube clogging and in the ascertainment of the leakage. The slinking tube clogging is detected through the comparison of measured momentary value with recorded readings, and/or the thermal radiation delivered from the plant and the thermal transition are determined on a cooling circuit within the cooling device. An independent claim is included for a device for cooling a continuous casting plant for the production of a metal casting strand or blast furnace.