| 摘要 |
PURPOSE: A pressure detection part drilling system capable of preventing clogging of pressure guiding pipe using air motor drill and capable of hole opening operation at ordinary times is provided. CONSTITUTION: The drilling system of blast furnace pressure detection part by using air motor comprises a flow rate detection part for detecting flow rate inside a pressure guiding pipe(4) from a purge nitrogen flow control system(8) connected to a shaft pressure detection part(2) of the blast furnace body by the pressure guiding pipe; a pressure signal control part for generating detection part closing signals when the flow rate detected in the flow rate detection part is lowered to a set value or less; a hole opening unit fixed to the shaft pressure detection part to open clogging of the shaft pressure detection part(2) using a drill driven by an air motor; and a hole opening unit control part for controlling driving of the hole opening unit by clogging signals of the detection part, wherein the drilling system further comprises pressure gauge(5), pressure signal indication part, pressure guiding pipe cutout valve(13), and alarm generation part, and wherein the hole opening unit comprises drill, air motor, air cylinder, air supply valve, and limit switch.
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