Microfocus three-dimensional CT imaging detection method for hot-melt welding quality of polyethylene pipelines
A hot-melt welding and CT imaging technology is applied in the field of micro-focus three-dimensional CT imaging detection of polyethylene pipe hot-melt welding quality, which can solve the problems of accuracy and on-site applicability that need to be improved and is not widely used, so as to ensure quality, Guarantee the effect of high radiation intensity and high imaging quality
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[0049] Example 1
[0050] As a preferred embodiment of the present invention, the present invention discloses a micro-focus three-dimensional CT imaging method for detecting the quality of polyethylene pipe hot-melt welding. The steps include:
[0051] a. Arrange the micro-focus 3D CT imaging device: choose the X-ray tube and flat-panel detector that are used in conjunction with each other. The flat-panel detector is connected to the computer integrated with the execution program of the three-dimensional CT imaging, and the X-ray tube and the flat-panel detector are placed for detection. At both ends of the platform, welded joints are arranged on the detection platform between the X-ray tube and the flat panel detector, and the welded joints can rotate freely and move freely between the X-ray tube and the flat panel detector;
[0052] b. Adjustment of the welding joint position: Open the X-ray tube, and the conical X-ray beam irradiates the welded joint in the circumferential and rad...
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[0059] Example 2
[0060] Specific application examples of the present invention, such as Figure 1~4 As shown, in the present invention, the micro-focus 3D CT device of the welded joint 2 of the polyethylene pipe 1 includes: an X-ray tube 3, a flat panel detector 4, a detection platform 10, and a computer 11. The computer integrates various execution programs for performing three-dimensional CT imaging, such as image calibration programs, CT scanning programs, and these integrated programs are all existing technologies in the field of CT imaging. First turn on the key switch, turn on the equipment and X-ray tube 3 control device, turn on the main switch; then turn on the corresponding ray control program, the system executes the automatic training machine; wait for the training machine to complete, turn on the image acquisition program, the system rotation axis 5 and the zoom axis 6 Perform automatic return to zero, and the flat panel detector 4 and X-ray tube 3 are automatical...
Example Embodiment
[0061] Example 3
[0062] The micro-focus three-dimensional CT imaging detection device provided by the present invention is used to detect a welded joint of a polyethylene pipe without defects. First, complete the equipment preparation and debugging according to the technical scheme provided by the present invention, and then place the polyethylene pipe joint on the detection platform according to the steps described in the scheme, adjust the tube voltage to 160KV, the tube current to 160μA, the minimum focus size is 179μm, and the magnification is 2.24 The pixel size of the flat-panel detector is 400μm, the image acquisition response time is adjusted to 500ms, the image resolution is 1024×1024, the number of superimposed images is 3, and the number of skipped frames is 1. The pipe joint rotates at a constant speed on the inspection platform, and the rays penetrate the joint from different directions. The flat panel detector automatically receives the ray signal and sends it to ...
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