Tube and tube plate welding seam ray detection device

Abstract

The utility model relates to a tube and tube plate welding seam ray detection device, which has the advantages of compact structure, convenience in operation and continuous and efficient detection. The detection device comprises a rod anode X-ray tube, a detection rod, a fixing ring, a protection tube, a hollow motor and an imaging assembly. And the detection rod is fixed on the boss of the rod anode X-ray tube and is clamped and fixed by the fixing ring and the protection tube. The imaging assembly comprises an imaging screen, a front cover plate, a rear cover plate and a PCB assembly and is connected with the hollow motor through the central shaft hole. The hollow motor is designed to be a hollow inner rotor motor and a hollow outer rotor motor, and different positioning and fixing modes are adopted for the hollow inner rotor motor and the hollow outer rotor motor so as to meet different application requirements and technical requirements. The detection device is designed to improve the precision and efficiency of tube and tube plate welding seam detection, and reliable support is provided for heat exchanger manufacturing quality control.

Description

Technical Field

[0001] The utility model relates to the technical field of radiographic inspection of weld quality, in particular to a radiographic inspection device for tube-to-tube sheet welds. Background Technique

[0002] The thickness of the tube-to-tube sheet fillet weld joint is only 1-2 mm, which is a key component in shell-and-tube heat exchanger equipment. Moreover, the welding process is complex and difficult, and it is easy to have pores or other defects. After long-term use of the equipment, leakage is likely to occur at the defective parts. Therefore, at present, it is necessary to improve the automation level of radiographic inspection of tube-to-tube sheet welds to meet the needs of manufacturing high-value heat exchangers, improve inspection efficiency and reduce costs.

[0003] The application number CN201621252131.X discloses a two-stage adapter and inspection device for radiographic inspection of tube-to-tube sheet welds, which adopts a two-stage structure. However, the operation of replacing the film is cumbersome, the inspection efficiency is low, and the cost of using the film is high.

[0004] The application number CN202311155509.9 discloses a rod anode X-ray flaw detector for tube-to-tube sheet welds of HPR1000 steam generators, which uses a rod anode X-ray machine + film technology to detect tube-to-tube sheet welds. However, the sensitivity of the obtained inspection images is not ideal, and the storage and retrieval of film images are not convenient. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a radiographic inspection device for tube-to-tube sheet welds, which has the effects of compact structure, convenient operation, and continuous and efficient inspection.

[0006] To achieve the above purpose, the utility model provides a radiographic inspection device for tube-to-tube sheet welds: a radiographic inspection device for tube-to-tube sheet welds, which is characterized by comprising a rod anode X-ray tube, a detection rod, a fixing ring, a protection tube, a hollow motor, and an imaging assembly; a convex platform with a central opening is provided on the rod anode X-ray tube; the detection rod is fixed in the hole of the convex platform of the rod anode X-ray tube; the fixing ring is sleeved on the top shell of the rod anode X-ray tube; the protection tube is sleeved on the detection rod and presses against the flange of the rod anode X-ray tube; the protection tube and the fixing ring are connected by screws and clamp the rod anode X-ray tube; central shaft holes for the detection rod to pass through are provided in the middle of both the hollow motor and the imaging assembly; the detection rod passes through the hollow motor and the imaging assembly; the hollow motor is connected to the protection tube; the imaging assembly is fixed on the rotor of the hollow motor; the imaging assembly includes an imaging screen, a front cover plate, a rear cover plate, and a PCB assembly; the imaging screen is composed of two or three or four or five or six CMOS sensors arranged in a circular array around the central shaft hole.

[0007] Preferably, the hollow motor is a hollow inner-rotor motor; the hollow inner-rotor motor includes a stator and a hollow rotor; the stator housing is radially positioned on the protective tube through a mounting flange and fixed with screws; a step is provided on one side of the hollow rotor away from the rod anode X-ray tube, and the step protrudes from the stator; a thread is provided at the end of the hollow rotor; the central shaft hole of the imaging assembly is sleeved on the shaft of the hollow rotor, and a nut is screwed onto the thread to press the imaging assembly against the step.

[0008] Preferably, the hollow motor is a hollow outer-rotor motor; the hollow outer-rotor motor includes a hollow stator and an outer rotor; a boss is provided on one side of the hollow stator close to the rod anode X-ray tube, and the boss is embedded into the corresponding groove of the protective tube; the hollow stator is axially fixed on the protective tube through a snap ring; the outer rotor is radially positioned and fixed with screws to the imaging assembly through a mounting flange. Brief Description of the Drawings

[0009] The present utility model will be further described below with reference to the drawings.

[0010] Figure 1 is an isometric schematic view of the present utility model.

[0011] Figure 2 is an exploded schematic view of the imaging assembly in the first embodiment of the present utility model.

[0012] Figure 3 is an exploded schematic view of the first embodiment of the present utility model.

[0013] Figure 4 is an isometric schematic view of the hollow inner-rotor motor in the first embodiment of the present utility model.

[0014] Figure 5 is an exploded schematic view of the second embodiment of the present utility model.

[0015] Figure 6 is an isometric schematic view of the hollow outer-rotor motor in the second embodiment of the present utility model.

[0016] Figures 1 to 6 In [the figures], 1. Rod anode X-ray tube, 2. Detection rod, 3. Fixed ring, 4. Protective tube, 5. Hollow motor, 6. Imaging assembly, 7. Hollow inner-rotor motor, 8. Nut, 9. Hollow outer-rotor motor, 10. Snap ring, 61. Imaging screen, 62. Front cover plate, 63. Rear cover plate, 64. PCB assembly, 71. Stator, 72. Hollow rotor, 73. Step, 74. Thread, 91. Hollow stator, 92. Outer rotor. Detailed Description of the Embodiments

[0017] In order to more clearly understand the technical content of the present utility model, specific embodiments are hereby given for detailed description.

[0018] It should be noted that when a component is referred to as "fixed to", "arranged on", or "mounted on" another component, it can be directly or indirectly located on that other component; when a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component; the orientations or positions indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positions shown in the drawings, and are only for the convenience of description and should not be construed as a limitation to the technical solution of the present invention; the terms "first" and "second" are only used for the purpose of convenient description and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features; the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0019] Example 1

[0020] Please refer to Example 1 Figures 1 to 4 as shown Figures 1 to 4 As shown, a ray detection device for a tube-to-tube sheet weld includes a rod anode X-ray tube 1, a detection rod 2, a fixing ring 3, a protective tube 4, a hollow motor 5, and an imaging component 6; the rod anode X-ray tube 1 is provided with a boss with a central opening; the detection rod 2 is fixed in the hole of the boss of the rod anode X-ray tube 1; the fixing ring 3 is sleeved on the top shell of the rod anode X-ray tube 1; the protective tube 4 is sleeved on the detection rod 2 and presses against the boss of the rod anode X-ray tube 1; the protective tube 4 is connected to the fixing ring 3 by screws and clamps the rod anode X-ray tube 1; both the hollow motor 5 and the imaging component 6 are provided with central axis holes for the detection rod 3 to pass through; the detection rod 3 passes through the hollow motor 5 and the imaging component 6; the hollow motor 5 is connected to the protective tube 4; the imaging component 6 is fixed on the rotor of the hollow motor; the imaging component 6 includes an imaging screen 61, a front cover plate 62, a rear cover plate 63, and a PCB component 64; the imaging screen 61 is formed by two or three or four or five or six CMOS sensors arranged in a circular array around the central axis hole.

[0021] The hollow motor 5 is a hollow inner rotor motor 7; the hollow inner rotor motor 7 includes a stator 71 and a hollow rotor 72; the stator 71 housing is radially positioned on the protective tube 4 through a mounting flange and fixed with screws; a step 73 is provided on one side of the hollow rotor 72 away from the rod anode X-ray tube, and the step 73 protrudes from the stator 71; a thread 74 is provided at the end of the hollow rotor 72; the central axis hole of the imaging component is sleeved on the shaft of the hollow rotor 72, and a nut 8 is screwed on the thread 74 to press the imaging component 6 against the step 73.

[0022] The imaging assembly 6 is powered through a power socket, and the imaging screen 61 is powered by the PCB assembly 64; during the detection process of the tube-to-tube sheet weld ray detection device, the end of the detection rod 3 is inserted into the tube to be measured, and X-rays are emitted to penetrate the tube-to-tube sheet weld; the X-rays pass through the carbon fiber front cover 62, and the imaging screen 61 collects the detected X-rays for image acquisition; the acquired image is immediately transmitted to the host computer through the network cable; after the first image transmission is completed, the hollow inner rotor motor 7 operates, and the hollow rotor 72 drives the imaging assembly 6 to rotate synchronously by a preset angle for the second image acquisition and transmission; the host computer synthesizes the images of the two imaging processes before and after to eliminate the seam between two adjacent CMOS sensors, so as to efficiently obtain high-sensitivity and seamless high-definition tube-to-tube sheet weld images. Thus, the tube-to-tube sheet weld ray detection device completes one detection. Repeat the above operation process until the expected set goal is achieved, forming a process closed-loop.

[0023] Example 2

[0024] Please refer to Example 2 Figures 5 to 6 as shown. Example 2 is a variant of Example 1 and is basically the same as Figures 1 to 4 the specific embodiment shown. The same parts are marked with the same reference numerals. Compared with Example 1, the hollow motor 5 in Example 2 is a hollow outer rotor motor 9; the hollow outer rotor motor 9 includes a hollow stator 91 and an outer rotor 92; a boss is provided on the side of the hollow stator 91 close to the rod anode X-ray tube 1, and the boss is embedded in the corresponding groove of the protection tube 4; a snap ring 10 axially fixes the hollow stator 91 on the protection tube 4; the outer rotor 92 is radially positioned and fixed to the imaging assembly 6 through a mounting flange with screws.

[0025] During the detection process of the tube-to-tube sheet weld ray detection device, the end of the detection rod 3 is inserted into the tube to be measured, and X-rays are emitted to penetrate the tube-to-tube sheet weld; the X-rays pass through the carbon fiber front cover 62, and the imaging screen 61 collects the detected X-rays for image acquisition; the acquired image is immediately transmitted to the host computer through the network cable socket; after the first image transmission is completed, the hollow outer rotor motor 9 operates, and the outer rotor 92 drives the imaging assembly 6 to rotate synchronously by a preset angle for the second image acquisition and transmission; the host computer synthesizes the images of the two imaging processes before and after to eliminate the seam between two adjacent CMOS sensors, so as to efficiently obtain high-sensitivity and seamless high-definition tube-to-tube sheet weld images. Thus, the tube-to-tube sheet weld ray detection device completes one detection. Repeat the above operation process until the expected set goal is achieved, forming a process closed-loop.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ray detection device for the weld between a pipe and a tube sheet, characterized in that, It includes a rod anode X-ray tube, a detection rod, a fixing ring, a protection tube, a hollow motor, and an imaging component; a boss with a central opening is provided on the rod anode X-ray tube; the detection rod is fixed in the hole of the boss of the rod anode X-ray tube; the fixing ring is sleeved on the top shell of the rod anode X-ray tube; the protection tube is sleeved on the detection rod and presses against the boss of the rod anode X-ray tube; the protection tube and the fixing ring are connected by screws and clamp the rod anode X-ray tube; both the hollow motor and the imaging component are provided with central shaft holes for the detection rod to pass through; the detection rod passes through the hollow motor and the imaging component; the hollow motor is connected to the protection tube; the imaging component is fixed on the rotor of the hollow motor; the imaging component includes an imaging screen, a front cover plate, a rear cover plate, and a PCB component; the imaging screen is arranged in a circular array around the central shaft hole by two or three or four or five or six CMOS sensors.

2. The radiographic inspection device for the weld between a pipe and a tube sheet according to claim 1, characterized in that, The hollow motor is a hollow inner rotor motor; the hollow inner rotor motor includes a stator and a hollow rotor; the stator is radially positioned on the protection tube by means of the mounting flange on its shell and fixed by screws; a step is provided on the side of the hollow rotor away from the rod anode X-ray tube, and the step protrudes from the stator; a thread is provided at the end of the hollow rotor; the central shaft hole of the imaging component is sleeved on the shaft of the hollow rotor, and a nut is screwed on the thread to press the imaging component against the step.

3. The radiographic inspection device for the weld between a tube and a tube sheet according to claim 1, characterized in that, The hollow motor is a hollow outer rotor motor; the hollow outer rotor motor includes a hollow stator and an outer rotor. A boss is provided on the side of the hollow stator close to the rod anode X-ray tube, and the boss is embedded in the corresponding groove of the protection tube; the hollow stator is axially fixed on the protection tube by a snap ring; the outer rotor is radially positioned with the imaging component by means of a mounting flange and fixed by screws.

Images