CN215727845U - Nondestructive testing device for weld penetration uniformity and cracks of tube plate plug - Google Patents
Nondestructive testing device for weld penetration uniformity and cracks of tube plate plug Download PDFInfo
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- CN215727845U CN215727845U CN202122119428.6U CN202122119428U CN215727845U CN 215727845 U CN215727845 U CN 215727845U CN 202122119428 U CN202122119428 U CN 202122119428U CN 215727845 U CN215727845 U CN 215727845U
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Abstract
A nondestructive testing device for weld penetration uniformity and cracks of a pipe plate plug comprises a magnetic fixing device, an XY two-dimensional moving platform, a horizontal rotating platform, two vertical direction sliding rails, an infrared camera and a laser heating device, two positioning cameras, a process monitoring and control device and a power supply, wherein the magnetic fixing device is fixed at the bottom of a three-point supporting framework of an automatic testing device and used for fixing a welding plug test sample piece; the method is based on the principle that obvious temperature difference at two sides of the defect is caused by the obstruction of the defect to the radial conduction heat flow at the center of the plug, and nondestructive detection is carried out on weld penetration uniformity and weld crack defects.
Description
Technical Field
The utility model belongs to the technical field of material engineering, and particularly relates to a nondestructive testing device for weld penetration uniformity and cracks of a pipe plate plug.
Background
The tube plate type heat exchanger manufactured by the welding method is widely used in the fields of power generation, petrochemical industry, pharmacy and the like. The connection mode of the heat exchange tube and the tube plate has various forms such as expanded joint, welding, expanded welding composite and the like, the steam generator is one of core equipment of thermal power and nuclear power technologies and is a typical application representative of a welded tube plate heat exchanger, and the quality of a welded joint of the tube plate tube and the tube plate has important significance for the safe production of a power plant.
The pipe and the pipe plate welding joint are weak links of thermal power and nuclear power steam generators, the pipe is damaged due to long-term high-temperature steam corrosion, mechanical vibration and external abrasive wear, mixing of heat exchange media is finally caused, heat exchange efficiency is reduced, and huge risks of radioactive substance leakage exist for the nuclear power steam generators. Thus, once a pipe fails, it is common to seal off the inlet and outlet of the damaged pipe to short the failed pipe. The plugging mode mainly comprises various modes such as mechanical expansion connection plugging pipes, welding plugging pipes, expansion connection and welding composite plugging pipes, wherein the welding plugging pipes are newly developed high-reliability plugging pipe modes. However, the relative lack of corresponding detection technology is a bottleneck problem affecting the wide application and the after-service quality tracking. After welding and in-service plug quality detection need to be finished on site, the characteristics of weld reinforcement, appearance and the like can be detected by the existing method, but for defects of weld penetration, weld internal cracks and the like, due to site space limitation and tube plate position limitation, the existing commonly used means such as ray detection, eddy current detection and the like cannot be implemented. The method adopted at present usually adopts destructive detection means to detect and evaluate the defects in the optimization and solidification stages of the welding process, and finally obtains optimized process parameters. However, the method has the problems that the detection is not used and the use is not detected, so that the used plug has the risk of containing defects. Therefore, a nondestructive testing method suitable for the weld penetration uniformity/consistency and the weld cracks of the tube plate welding plug is urgently needed to be developed.
Disclosure of Invention
Aiming at the bottleneck problem that no nondestructive detection method for effectively detecting and evaluating the weld penetration uniformity and the weld crack defect of the tube plate welding plug exists at present, the utility model aims to provide a nondestructive testing device for the weld penetration uniformity and the crack of the tube plate plug.
The utility model is realized by the following technical scheme:
a nondestructive testing device for the weld penetration uniformity and cracks of a pipe plate plug comprises an automatic testing device three-point supporting framework 2, a magnetic fixing device 3 fixed at the bottom of the automatic testing device three-point supporting framework 2 and used for fixing a welding plug test sample piece 1, an XY two-dimensional moving platform 4 fixed at the inner side surface of the top of the automatic testing device three-point supporting framework 2, a horizontal rotating platform 5 fixed at the lower part of the XY two-dimensional moving platform 4, a first vertical direction slide rail 9 and a second vertical direction slide rail 10 fixed at two ends of the lower part of the horizontal rotating platform 5, an infrared camera 8 and a laser heating device 7 respectively fixed at the lower parts of the first vertical direction slide rail 9 and the second vertical direction slide rail 10, and two positioning cameras 6 fixed at the lower part of the horizontal rotating platform 5 and positioned between the first vertical direction slide rail 9 and the second vertical direction slide rail 10, the system comprises a data and electric power transfer interface 11 arranged on an automatic testing device three-point supporting framework 2, a process monitoring and control device 12 and a power supply 13, wherein the process monitoring and control device is connected with an XY two-dimensional moving platform 4, a horizontal rotating platform 5, a positioning camera 6, a laser heating device 7, an infrared camera 8, a first vertical direction slide rail 9 and a second vertical direction slide rail 10 through the data and electric power transfer interface 11.
The welding plug test sample 1 is a new product of a tube plate welding plug or an in-service tube plate welding plug.
The two positioning cameras 6 are not parallel to each other and can coincide towards the focal length.
The testing device is implemented according to the following testing steps: firstly, removing attachments such as oxides, organic matters and the like on the surfaces of plugs 1-3 and nearby areas in a welding plug test sample 1 by adopting a mechanical polishing and organic solvent cleaning method, and ensuring that the center parts of the plugs are smooth; fixing a testing device on the surface of a welding plug testing sample 1 through a magnetic fixing device 3; secondly, starting a testing device, driving two positioning cameras 6 which are not parallel to each other by a process monitoring and controlling device 12, measuring the geometric center of the plug to be tested by an image method, and obtaining the plane coordinate of the plug to be tested; the XY two-dimensional moving platform 4 and the horizontal rotating platform 5 are driven by the process monitoring and controlling device 12 to enable the laser heating device 7 to be aligned to the geometric center of the plane of the plugs 1-3; heating the center of the surface of the plug 1-3 with the diameter being between 1/8-1/2 of the plug by using laser or a heating rod in a mode of focusing by using laser or driving the second vertical slide rail 10, and covering the surface by using a ceramic heat-insulating fiber blanket; and finally, after heating for a certain time, taking out the ceramic thermal insulation fiber, driving the XY two-dimensional moving platform 4 and the horizontal rotating platform 5 through the process monitoring and control device 12 to enable the infrared camera 8 to be aligned to the geometric center of the plane of the plugs 1-3, testing the temperature field on the surface of the welding plug test sample 1 under a reasonable view field by driving the first vertical direction slide rail 9, and judging that the weld penetration is shallow or the weld has cracks when the temperature in the welding seam and the outside of the welding seam is lower than a certain value of the temperature of the area with the same diameter.
Compared with the prior art, the utility model has the following advantages:
1) the quality of the plug is not affected in the testing process, the testing equipment is small in size, and the hardware requirement is simple.
2) The testing time of a single plug is short.
3) Semi-quantitative results of defect size can be obtained by theoretical calculations.
Drawings
FIG. 1 is a nondestructive testing apparatus for weld penetration uniformity and cracks of a tube plate plug; in the figure, 1-welding plug test sample pieces (1-1 tube plate, 1-2 tubes, 1-3 plugs and 1-4 welding seams), 2-an automatic test device three-point support framework, 3-a magnetic fixing device, a 4-XY two-dimensional moving platform, 5-a horizontal rotating platform, 6-a positioning camera, 7-a laser heating device, 8-an infrared camera, 9-a first vertical direction slide rail, 10-a second vertical direction slide rail, 11-a data and power transfer interface, 12-a process monitoring and control device and 13-a power supply.
Detailed Description
The present invention will now be described in further detail with reference to the following detailed description and accompanying drawings of which, by way of illustration and not limitation, the utility model is described.
FIG. 1 is a diagram of a device for realizing the nondestructive testing method of the weld penetration uniformity and cracks of the tube plate plug, which comprises an automatic testing device three-point supporting framework 2, a magnetic fixing device 3 fixed at the bottom of the automatic testing device three-point supporting framework 2 and used for fixing with a welding plug testing sample piece 1, an XY two-dimensional moving platform 4 fixed at the inner side surface of the top of the automatic testing device three-point supporting framework 2, a horizontal rotating platform 5 fixed at the lower part of the XY two-dimensional moving platform 4, a first vertical direction slide rail 9 and a second vertical direction slide rail 10 fixed at two ends of the lower part of the horizontal rotating platform 5, an infrared camera 8 and a laser heating device 7 respectively fixed at the lower parts of the first vertical direction slide rail 9 and the second vertical direction slide rail 10, and two positioning cameras 6 fixed at the lower part of the horizontal rotating platform 5 and positioned between the first vertical direction slide rail 9 and the second vertical direction slide rail 10, the system comprises a data and electric power transfer interface 11 arranged on an automatic testing device three-point supporting framework 2, a process monitoring and control device 12 and a power supply 13, wherein the process monitoring and control device is connected with an XY two-dimensional moving platform 4, a horizontal rotating platform 5, a positioning camera 6, a laser heating device 7, an infrared camera 8, a first vertical direction slide rail 9 and a second vertical direction slide rail 10 through the data and electric power transfer interface 11.
The utility model discloses a nondestructive testing method for weld penetration uniformity and cracks of a welding plug, which is implemented by the following steps:
firstly, removing attachments such as oxides, organic matters and the like on the surface of the plug 1-3 and in the nearby area by adopting a mechanical polishing and organic solvent cleaning method, and ensuring that the central part of the plug is flat and has the roughness not higher than Ra 4.5 mu m; the automatic testing device shown in fig. 1 is fixed on the surface of a welding plug test sample 1 through a magnetic fixing device 3. Secondly, the automatic detection device is started, the process monitoring and control device 12 drives the two positioning cameras 6 which are not parallel to each other to determine the geometric center of the plug to be detected by an image method, and the plane coordinate of the plug to be detected is obtained. The XY two-dimensional moving platform 4 and the horizontal rotating platform 5 are driven by the process monitoring and controlling device 12 to enable the laser heating device 7 to be aligned to the geometric center of the plane of the plugs 1-3. The center of the surface of the plug 1-3 with the diameter being between the diameters 1/8-1/2 of the plug is heated by laser or a heating rod in a mode of focusing by laser or driving the second vertical slide rail 10, and the surface is covered by a ceramic heat-insulating fiber blanket. And finally, after heating for a certain time, taking out the ceramic thermal insulation fiber, driving the XY two-dimensional moving platform 4 and the horizontal rotating platform 5 through the process monitoring and control device 12 to enable the infrared camera 8 to be aligned to the geometric center of the plane of the plugs 1-3, testing the temperature field on the surface of the welding plug test sample 1 under a reasonable view field by driving the first vertical direction slide rail 9, and judging that the weld penetration is shallow or the weld has cracks when the temperature in the welding seam and the outside of the welding seam is lower than a certain value of the temperature of the area with the same diameter.
The specific embodiment is as follows:
example 1: the specific embodiment is as follows:
example 1: an Incolly 800H alloy pipe with the outer diameter of 19mm and the wall thickness of 3mm and a TIG welding joint made of an Incolly 800H alloy pipe plate with the thickness of 200mm are selected, and the Incolly 800H plug with the diameter of 12.85mm is selected to plug the pipe by adopting a TIG welding method. After plugging, the welding plug test sample 1 shown in fig. 1 is obtained by machining. Firstly, removing attachments such as oxides, organic matters and the like on the surface of the plug 1-3 and in the nearby area by using an angle grinder polishing and acetone cleaning method, and ensuring that the central part of the plug is flat and has roughness not higher than Ra 4.5 mu m; next, the automatic testing apparatus shown in fig. 1 is fixed to the surface of the welding plug test sample 1 by the magnetic fixing device 3. Secondly, the automatic detection device is started, the process monitoring and control device 12 drives the two positioning cameras 6 which are not parallel to each other to determine the geometric center of the plug to be detected by an image method, and the plane coordinate of the plug to be detected is obtained. The XY two-dimensional moving platform 4 and the horizontal rotating platform 5 are driven by the process monitoring and controlling device 12 to enable the laser heating device 7 to be aligned to the geometric center of the plane of the plugs 1-3. The center of the surface of the plug 1-3 with the diameter being between the diameters 1/8-1/2 of the plug is heated by laser or a heating rod in a mode of focusing or driving the second vertical slide rail 10 by laser, the heating temperature is set to 450 ℃ by adjusting the laser power, and the surface is covered by a ceramic heat-insulating fiber blanket. And finally, after heating for 3.5 minutes, taking out the ceramic thermal insulation fiber, driving the XY two-dimensional moving platform 4 and the horizontal rotating platform 5 through the process monitoring and control device 12 to enable the infrared camera 8 to be aligned to the geometric center of the plane of the plugs 1-3, testing the temperature field on the surface of the sample in a reasonable visual field by driving the first vertical direction slide rail 9, and judging that the weld penetration is shallow or the weld has cracks when the temperature in the weld and the outer side of the weld is lower than a certain value of the temperature in the same diameter region. The method comprises the steps of testing 3 samples under different welding parameters totally, wherein no welding crack is found in any of the 3 samples, strip-shaped areas which are parallel to an annular welding seam and have the temperature difference between 15 ℃ and 29 ℃ and the length of 8.2mm exist on two sides of the welding seam in 1 sample, judging the strip-shaped areas as the defects of the weld penetration depth, dissecting and observing the samples subjected to nondestructive testing by adopting a destructive metallographic method, wherein the observation result is consistent with the nondestructive testing result, no defect is found in any of the 2 samples, the strip-shaped areas exist in the 1 sample, and the length testing result is 7.4 mm.
Claims (3)
1. The nondestructive testing device for the weld penetration uniformity and cracks of the pipe plate plug is characterized by comprising an automatic testing device three-point supporting framework (2), a magnetic fixing device (3) fixed at the bottom of the automatic testing device three-point supporting framework (2) and used for fixing a welding plug test sample piece (1), an XY two-dimensional moving platform (4) fixed at the inner side surface of the top of the automatic testing device three-point supporting framework (2), a horizontal rotating platform (5) fixed at the lower part of the XY two-dimensional moving platform (4), a first vertical direction slide rail (9) and a second vertical direction slide rail (10) fixed at the two ends of the lower part of the horizontal rotating platform (5), an infrared camera (8) and a laser heating device (7) fixed at the lower parts of the first vertical direction slide rail (9) and the second vertical direction slide rail (10) respectively, and a horizontal rotating platform (5) fixed at the lower part and located at the first vertical direction slide rail (9) and the second vertical direction slide rail (7) Two location cameras (6) between slide rail (10), data and electric power transfer interface (11) of setting on automatic testing arrangement three point support skeleton (2), through data and electric power transfer interface (11) and XY two-dimensional moving platform (4), horizontal rotation platform (5), location camera (6), laser heating device (7), infrared camera appearance (8), process monitoring and controlling means (12) and power (13) that first vertical direction slide rail (9) and second vertical direction slide rail (10) are connected.
2. The nondestructive testing device for the weld penetration uniformity and cracks of the tube plate plug according to claim 1, wherein the welding plug test sample (1) is a new tube plate welding plug or an in-service tube plate welding plug.
3. The nondestructive testing device for the weld penetration uniformity and cracks of the pipe plate plug according to claim 1, wherein the two positioning cameras (6) are not parallel to each other and can be overlapped in focal length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122119428.6U CN215727845U (en) | 2021-09-03 | 2021-09-03 | Nondestructive testing device for weld penetration uniformity and cracks of tube plate plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122119428.6U CN215727845U (en) | 2021-09-03 | 2021-09-03 | Nondestructive testing device for weld penetration uniformity and cracks of tube plate plug |
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| Publication Number | Publication Date |
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| CN215727845U true CN215727845U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122119428.6U Active CN215727845U (en) | 2021-09-03 | 2021-09-03 | Nondestructive testing device for weld penetration uniformity and cracks of tube plate plug |
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- 2021-09-03 CN CN202122119428.6U patent/CN215727845U/en active Active
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Effective date of registration: 20230621 Address after: 100031 A312, 3rd floor, building 6, fuxingmennei street, Xicheng District, Beijing Patentee after: HUANENG GROUP TECHNOLOGY INNOVATION CENTER Co.,Ltd. Patentee after: Xi'an Thermal Power Research Institute Co.,Ltd. Address before: 710032 No. 136 Xingqing Road, Beilin District, Xi'an City, Shaanxi Province Patentee before: Xi'an Thermal Power Research Institute Co.,Ltd. Patentee before: HUANENG GROUP TECHNOLOGY INNOVATION CENTER Co.,Ltd. |
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