Ray digital imaging detection system for pressure equipment girth welds

[0016] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0017] figure 1 It is a three-dimensional view of a digital imaging detection system for girth welds of pressure equipment according to an embodiment of the present invention, Figure 2a for figure 1 The main view, Figure 2b for figure 1 Top view. The following combination Figure 1-Figure 2b Explain the working principle of the system. The system includes: an automatic scanning device 10 for pressure-bearing equipment, which is arranged outside the pressure-bearing equipment 40 and is used to rotate around the axial direction of the pressure-bearing equipment 40; a ray emission device 20 is fixed to the automatic scanning device 10 for pressure-bearing equipment, It is used to emit rays to pass through the girth weld 401; the ray receiving and image processing device 30 is fixed to the pressure-bearing equipment automatic scanning device 10, and is arranged opposite to the ray emitting device 20, for receiving the emitted rays, and The optical signal of the ray is converted into a digital signal to generate a circular weld inspection image, and the image is processed to generate a processing result.

[0018] The radiation emitting device 20 is preferably a portable X-ray machine. The radiation receiving and image processing device 30 includes: a detector for receiving the emitted radiation, the detector being a flat-panel detector or a linear array detector; an image processing device, connected to the detector, for removing light from the radiation The signal is converted into a digital signal to generate a circular weld inspection image, and the image is processed to generate a detection result.

[0019] Such as Figure 2a As shown, in a preferred embodiment, the pressure-bearing equipment automatic scanning device 10 is more than half a circle, and the ray transmitting device 20 and the ray receiving and image processing device 30 are located at the diameter of the pressure-bearing equipment 40 In this way, it can ensure that the system will not be separated from the pressure-bearing device 40 when rotating, and it is also easier to align the radiation emitting device 20 with the radiation receiving and image processing device 30.

[0020] In a simplest implementation, the automatic scanning device for pressure-bearing equipment at least includes: an annular device, a driving wheel and a driven wheel; the driving wheel is fixed to the ring-shaped device and is in contact with the surface of the pressure-bearing equipment, and is driven by a motor Driven to rotate to drive the annular device to rotate around the axial direction of the pressure-bearing device; a driven wheel is fixed to the annular device and contacts the surface of the pressure-bearing device, and is driven to rotate by the driving wheel to drive the annular device around The axial rotation of the pressure-bearing device. In this simplest way, because the diameter of the ring device is fixed, it can only be designed for specific pressure-bearing equipment.

[0021] image 3 It is a detailed structural diagram of an automatic scanning device 10 for pressure equipment according to an embodiment of the present invention. In order to meet the requirements for the detection of circumferential welds of pressure-bearing equipment with different diameters, in a preferred embodiment, the annular device of the pressure-bearing equipment automatic scanning device 10 includes a plurality of diameter-reducing connecting rods 102 and a diameter-reducing adjusting device 101. The diameter reducing adjusting device 101 is inserted in the middle of the annular device, and the number of reducing connecting rods 102 on both sides of the reducing diameter adjusting device 101 is the same, so that the pressure-bearing equipment automatic scanning device 10 forms a symmetrical structure, It is easy to adjust the diameter. The diameter of the annular device can be adjusted by adding or reducing the diameter reducing link 102 in pairs on both sides of the diameter reducing device, and cooperating with the diameter reducing device 101.

[0022] Such as image 3 As shown, the reducing connecting rod 102 includes: a pair of reducing connecting rod pieces arranged at a certain interval along the axial distance of the pressure-bearing device, and each pair of reducing connecting rod pieces is provided with a corresponding pin hole, Adjacent variable-diameter connecting rods are connected through a pin shaft through a pin shaft hole.

[0023] Figure 4 This is a detailed configuration diagram of the diameter reducing adjustment device 101. As shown in the figure, the reducing adjustment device 101 includes: two groups of reducing adjusting connecting rods 206 and 207, reducing adjusting sliding rod 205, reducing adjusting bolt 201, reducing adjusting slider 202, two reducing adjusting support rods 203. among them:

[0024] Each group of variable diameter adjusting connecting rods includes a pair of variable diameter adjusting connecting rod pieces arranged at a certain interval along the axial distance of the pressure-bearing equipment, and one end of each pair of reducing adjusting connecting rod pieces is connected to two pieces through a pin 204, respectively. The diameter-reducing connecting rod pieces on the side are connected, each pair of diameter-reducing adjusting connecting rod pieces is provided with opposite grooves along the circumferential direction of the pressure-bearing device, and the other ends of the two pairs of reducing connecting rod pieces are along the grooved contour The direction overlaps and slides.

[0025] The two ends of the diameter-reducing adjustment sliding rod 205 are respectively inserted into the slots of the two groups of diameter-reducing adjustment connecting rods, and can slide in the slots. The diameter-reducing adjusting bolt 201 is arranged along the radial direction of the pressure-bearing equipment, and the bottom part is fixed to the diameter-reducing adjusting sliding rod 205 with a pin. The diameter-reducing adjusting slider 202 is screwed on the diameter-reducing adjusting bolt 201. One end of each diameter reducing adjustment support rod 203 is fixed on the pin shaft 204, and the other end is rotatably connected with one end of the diameter reducing adjustment slider 202. The rotation of the diameter-reducing adjustment bolt 201 drives the up and down movement of the diameter-reducing adjustment slider 202, so that the included angle between the two diameter-reducing adjustment support rods 203 is changed, thereby driving the gap between the diameter-reducing adjustment connecting rod pieces The relative sliding is completed to adjust the diameter of the ring device, so that the driving wheel and the driven wheel can roll close to the surface of the pressure-bearing equipment.

[0026] Refer again image 3 In order to adjust the relative position between the ray emitting device 20 and the ray receiving and image processing device, the pressure-bearing equipment automatic scanning device 10 also includes: two sets of variable diameter fine-tuning connecting rods 105, a detector fixing frame 107 and a ray source fixing 架109. Among them, two groups of diameter-reducing fine-tuning connecting rods 105 are respectively connected to the two diameter-reducing connecting rods on the outside of the ring device, and each group of reducing-diameter fine-tuning connecting rods includes two diameter-reducing fine-tuning connecting rods, such image 3 As shown, a gear meshing is adopted between two diameter-reducing fine-tuning links 105 so that two adjacent diameter-reducing fine-tuning links can rotate around the gear.

[0027] The detector fixing frame 107 is fixed on one group of variable diameter fine-tuning connecting rods, such as image 3 As shown, the detector fixing frame 107 is preferably straddled between two diameter-reducing fine-tuning links, so that the gear meshing position is located in the middle of the detector fixing frame. A radiation receiving and image processing device 30 is installed on the detector fixing frame 107. The ray source fixing frame 109 is fixed to another group of variable diameter fine-tuning connecting rods, and the ray emitting device 20 is installed on the ray source fixing frame 109. Like the detector fixing frame, the ray source fixing frame 109 is preferably arranged across the two diameter-reducing fine-tuning links, so that the gear meshing position is located in the middle of the detector fixing frame.

[0028] Each diameter-reducing fine-tuning connecting rod includes a pair of diameter-reducing fine-tuning connecting rod pieces arranged at a certain interval along the axial direction of the pressure-bearing device. Such as image 3 As shown, each diameter-reducing fine-tuning connecting rod piece includes a waist-shaped hole 1041 arranged in a radial direction, and each waist-shaped hole is provided with a locking handle 104 to fix the detector fixing frame and the radiation source fixing frame, When the locking handle 104 is released, in conjunction with the rotation of the gear, the radiation source fixing frame and the detector fixing frame can be moved along the contour of the waist hole 1041 to adjust the detector fixing frame and the radiation source fixing frame s position.

[0029] The ray source fixing frame 108 further includes a pitch angle adjustment slider 108. One end of the pitch angle adjustment slider is connected to the front end of the ray source 20, and the other end slides along the circumferential direction of the ring device to realize the ray Adjustment of source pitch angle. The specific sliding manner may be: the other end is connected to the diameter-reducing fine-tuning link, the diameter-reducing fine-tuning link is also provided with a circumferential waist-shaped hole 1081, and the pitch angle adjustment slider slides along the waist-shaped hole 1081.

[0030] Figure 5 It is a schematic diagram of driving wheel driving according to an embodiment of the present invention. As shown in the figure, the motor frame 110 includes a driving gear 111 and a driven gear 112, and the motor 113 drives the driving gear 111 and the driven gear 112 to rotate, thereby driving the driving wheel to rotate.

[0031] According to the embodiment of the present invention, the pressure-bearing equipment girth weld ray digital imaging detection system adds or reduces the diameter-reducing connecting rods in pairs, and cooperates with the diameter-reducing adjusting part to change the ring diameter, so as to realize the girth weld of pressure equipment with different diameters. Digital imaging inspection can not only greatly reduce inspection costs, shorten product development cycle, but also quickly identify defects.

[0032] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in further detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. The protection scope, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.