Phased array ultrasonic detection self-adaptive balance probe bin for fillet welds of tube and tube plates

Abstract

The invention discloses a phased array ultrasonic detection self-adaptive balance probe bin for fillet welds of tubes and tube plates, which comprises a bin cover, a bin body and a roller frame, and is characterized in that the bin cover is arranged above the bin body, is connected with the bin body in a sliding manner, can slide in the horizontal direction relative to the bin body, and can drivethe bin body to rotate in the vertical direction; a groove is formed in the bin body, and a probe wedge block and a piezoelectric wafer are arranged in the groove and pressed through a gland. The roller frame is fixed to the face, back on to the bin body, of the gland, a spring is arranged between the roller frame and the gland, and a roller is installed in the roller frame. The problems that in the scanning process, a probe is not tightly attached to the inner wall of a pipe, poor in contact, unstable in operation, poor in coupling, lost or drifted in signal, inaccurate in positioning and thelike are solved.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, in particular to a phased array ultrasonic testing probe chamber. Background technique [0002] Tube-tube-sheet fillet welds are the main welding structure of tube-and-tube heat exchangers and reactors. This structure is the weak link of the equipment and is prone to leakage, so non-destructive testing is required. In the past, the detection method used was X-ray detection. In recent years, the technology and equipment of using phased array ultrasonic detection of tube plate fillet welds have been invented. [0003] During the phased array inspection of the tube plate fillet weld, the probe should be put into the probe chamber, and then the probe chamber should be put into the pipe. The probe chamber is filled with water as a couplant, and is driven by a motor to rotate. The ultrasonic wave emitted by the probe scans the entire circle of the fillet weld and receives the echo sig...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a self-adaptive balanced probe chamber for phased array ultrasonic detection of pipe, tube and plate fillet welds, to solve the problem of rigid probe chambers used in the pipe and tube plate fillet weld phased array detection system in the prior art. Poor coupling leads to signal loss, and it is easy to cause the problem of signal drift caused by the tight and sometimes loose fit between the probe and the inner wall of the pipe

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