The invention provides a manual multichannel TOFD (time of flight diffraction) scanning frame and belongs to the technical field of machines. The manual multichannel TOFD scanning frame can be used for solving the problems that the existing TOFD scanning frame is inconvenient in operation and scanned data is not accurate enough. The multichannel TOFD scanning frame comprises a total coder, a roller, a pushing handle and a plurality of pairs of probe assemblies as well as a vertical beam and a plurality of cross beams, wherein the probe assemblies are electrically connected with the total coder, the roller and the probe assemblies are arranged on the cross beam, the pushing handle and the total coder are connected above the vertical beam, an alarm and a steering angle instrument are also arranged on the scanning frame, the steering angle instrument is arranged on the vertical beam and is electrically connected with the total coder, and the alarm is electrically connected with the total coder. The multichannel TOFD scanning frame has the advantages that whether the direction of travel of the scanning frame shifts from a desired track or not is detected by virtue of the steering angle instrument, and an alarm is given to inform a scanning worker of adjusting a scanning direction, so that accuracy of defect data obtained by scanning is guaranteed.

Manual multichannel TOFD (time of flight diffraction) scanning frame

The invention discloses a scanning device applied to ultrasonic detection of pipeline-flange angle welding seams. The scanning device comprises a main framework, a scanning mechanism mounted on the main framework and a roller mechanism connected with the main framework, wherein the main framework is formed by connecting two pairs of guide rods with different lengths by virtue of a corner bracket and a right-angle bracket; the roller mechanism is mounted at the end of the right-angle bracket; a sliding scanning mechanism is mounted on each guide rod; long guide rods stretch into a pipeline, so that the scanning mechanisms mounted on the long guide rods are capable of detecting angle welding seams from the inner wall of the pipeline; short guide rods are arranged on the external surface of a flange plate, so that the scanning mechanisms mounted on the short guide rods are capable of detecting the angle welding seams from the surface of the flange. According to the device, ultrasonic probes are simultaneously arranged on the inner wall of the pipeline and the surface of the flange, so that the device is capable of carrying out ultrasonic detection on defects in the pipeline-flange angle welding seams on the inner wall of the pipeline and the surface of the flange; a novel implementation tool is provided for ultrasonic detection of the defects in the pipeline-flange angle welding seams.

Scanning device applied to ultrasonic detection of pipeline-flange angle welding seams

The invention discloses a mixed type weld joint detection trolley which comprises a longitudinal beam connection mechanism, a cross beam driving mechanism horizontally arranged at the front end of the longitudinal beam connection mechanism, and a steering mechanism horizontally arranged at the back end of the longitudinal beam connection mechanism, wherein an angle adjusting mechanism used for adjusting different detection angles is arranged between the cross beam driving mechanism and the longitudinal beam connection mechanism; one probe fixture used for clamping PAUT phased array probes and/or TOFD probes is arranged below each of the angle adjusting mechanism and the cross beam driving mechanism in a sliding manner. According to the mixed type weld joint detection trolley, the angle adjusting mechanism is arranged, so that accurate positioning can be realized on the main basis of TOFD scanning (non-parallel scanning and transverse defect scanning) and on the auxiliary basis of PAUT (phased array), and the problem that TOFD positioning is poor in accuracy is effectively solved; the problem of transverse defect scanning can be solved, so that the detection quality is effectively improved, the service life of the product is guaranteed, and the engineering accidents are reduced.

Mixed type weld joint detection trolley

The invention discloses a scanning frame for TOFD detection of minor-diameter thick-wall equipment, and belongs to the field of weld nondestructive detection equipment; the structure comprises a T-shaped main frame, a C-shaped front wheel support, and C-shaped back wheel support; the bottom end of the main frame is provided with a main magnetic wheel; the front wheel support and the back wheel support are respectively disposed at the front and back side of the center of a main frame crossbeam; the connection ends of both the front wheel support and the back wheel support have a gear structure, and are engaged together with each other; the bottom end of the front side of the front wheel support is provided with a front magnetic wheel, and the bottom end of the back side of the back wheel support is provided with a back magnetic wheel. The invention has the characteristics of reasonable design, simple structure, easy processing, convenient application, accurate detection, high working efficiency, and the like; because the adopted front and the back support can be adjusted synchronously, TOFD detection of equipment with different external diameters can be realized; especially for radial, axial welds of minor-diameter thick-wall equipment, the scanning frame with the three-wheel structure can realize accurate detection of linear welds.

Scanning frame for TOFD detection of minor-diameter thick-wall equipment

The utility model discloses an arm type automatic pipeline scanning device applied to the electromagnetic ultrasonic flaw detection, and relates to the technical field of nondestructive examination. The arm type automatic pipeline scanning device comprises a first probe component, a second probe component, a first arm plate, a second arm plate and a screw rod adjustment mechanism, wherein one end of the first arm plate is connected with the first probe component, and the other end of the first arm plate is hinged with the screw rod adjustment mechanism; one end of the second arm plate is connected with the second probe component, and the other end of the second arm plate is hinged with the screw rod adjustment mechanism; a first transverse lever is connected between the first arm plate and the second arm plate, and a second transverse lever is arranged below the first transverse lever in parallel. By the use of the screw rod adjustment mechanism and the hinge connection between each of the arm plates and the screw rod adjustment mechanism, the arm plates of the scanning device can be opened with different angles, so that the detection range of the scanning device is effectively, conveniently and quantitatively enlarged.

Li Zhijun

Papers

Combined TOFD and phased array imaging scanner for weld of seal head for pressure vessel