THE WATER COLUMN WEDGE UNIT FOR THE AUTOMATED ULTRASONIC TEST ON BLADE PINS OF TURBINE IN THE POWER PLANT

摘要

The present invention relates to a water column wedge unit for automatically ultrasonically inspecting a blade pin (1A) portion of the turbine blade fastening portion, which is a component of a turbine for power generation, and has a plurality of ultrasonic medium receiving parts (11) therein. A housing 10 in which an inspection water column is formed; A flexible tube 30 mounted at a lower end of the water receiving unit 11; A cover 20 covering the upper open surface of the housing 10; An air blowing unit (40) positioned on the upper side of the housing (10) and mounted in communication with the water receiving unit (11); A water injection unit 50 positioned at a lower side of the housing 10 to supply water to the water injection unit 11; An ultrasonic probe (60) installed on the cover (20) to generate ultrasonic waves into the order portion (11); A fixing jig 70 supporting and fixing the housing 10; The technical features of the guide unit 80 is coupled to the lower side of the both sides of the housing 10 to guide the movement of the housing 10 while being in contact with the subject (1). According to the present invention, the ultrasonic wave radiated from the ultrasonic probe always passes through the contact medium and reaches the surface of the blade pin while using a small amount of contact medium when inspecting the blade pin using ultrasonic waves. Can be prevented from being lost or weakened, increasing the accuracy of the test, and increasing the efficiency of multiple pins simultaneously and by automating the test.