Semi-automatic scanner for ultrasonic inspection of branch pipe weld

A semi-automatic scanner for ultrasonic inspection, comprising:

• a probe configured to inspect a weld by irradiating ultrasonic waves onto a surface of a test object;
• a probe holder configured to couple the probe by applying an elastic force so as to be pressed against the surface of the test object;
• an installation bracket having a rod shape to which the probe holder is coupled so as to be laterally movable;
• four wheel units installed on both front and rear side surfaces of the installation bracket so as to be vertically slidable;
• and
• four magnet parts, each of which is installed on one of the four wheel units and presses the one of the wheel units against the test object with a magnetic force;
• wherein the probe holder includes:
• a lateral guide part installed in the installation bracket in a direction perpendicular to a length direction of the installation bracket to guide lateral movement of the probe,
• a vertical movement guide part installed to vertically stand at the lateral guide part so as to be laterally movable,
• a vertical movement bracket installed to surround the vertical movement guide part to vertically move along the vertical movement guide part,
• an elastic pressing part installed between the vertical movement bracket and the vertical movement guide part and configured to press the vertical movement bracket downward using an elastic force, and
• a probe coupling part coupled to a front surface of the vertical movement bracket so as to be freely rotatable and configured to couple both side surfaces of the probe so as to be freely rotatable;
• wherein the wheel unit includes:
• a vertical movement guide installed on one side surface of the installation bracket so as to be perpendicular to a length direction of the installation bracket,
• a vertical movement part installed to surround the vertical movement guide and slide along the vertical movement guide,
• an elastic pressing part installed between the vertical movement part and the vertical movement guide and configured to press the vertical movement part downward with an elastic force, and
• a wheel installed at a lower side end portion of the vertical movement part so as to be freely rotatable;
• wherein the installation bracket is provided with a pair of installation brackets installed to symmetrically face each other on the left and right of the lateral guide part, the installation bracket is divided at a center thereof, the lateral guide part is inserted and installed between the divided installation brackets;
• wherein a coupling groove is formed in the vertical movement bracket, a coupling portion is formed to protrude from a rear end of the probe coupling part, the coupling portion protrudes from the rear end of the probe coupling part and is formed to have a locking groove along an outer circumferential surface thereof, the coupling portion has a cylindrical shape inserted into the coupling groove;
• wherein a pair of ball plungers pass through plunger installation holes formed in the vertical movement bracket and are installed to enter through side portions of the coupling groove, the ball plungers press the coupling portion inserted into the coupling groove with an elastic force to fix the coupling portion to not deviate from the coupling groove.