Modular radiographic patch device

Abstract

This utility model discloses a modular radiographic testing patch device, comprising: a patch groove, a radiographic film dark bag, a pipe fitting fixing device, and an image quality meter; the patch groove includes a base plate and baffles at both ends of the base plate; the upper surface of the base plate is a lead plate; the radiographic film dark bag is placed on the lead plate, and the radiographic film is stored inside the radiographic film dark bag; the image quality meter is supported above the patch groove by an image quality meter support device, and forms a cantilever parallel to the surface of the base plate; the image quality meter support device is fixed to one end baffle of the patch groove; the pipe fitting fixing device includes a base plate connector and a circular fastening device, the circular fastening device is fixed directly below the base plate by the base plate connector, and the circular fastening device is used to clamp the pipe fitting to be tested and make its bottom fit against the radiographic film dark bag, and its top positioned below the image quality meter. This device meets the requirements of positioning accuracy, fixing stability, and imaging quality for radiographic testing of small-diameter pipe welds.

Description

Technical Field

[0001] This utility model relates to the field of radiographic testing technology, specifically to a modular radiographic testing patch device. Background Technology

[0002] In nuclear power plant construction, metal welding is a massive undertaking. The welding quality of critical steel structural components such as spent fuel pools, reactor pressure vessels, and containment steel linings primarily relies on non-destructive testing for acceptance. Radiographic testing is one of the core technologies for assessing metal welding quality, with stringent acceptance standards and a comprehensive document review mechanism. Excessive welding defects can seriously threaten the safe operation of the unit; therefore, the reliability of the testing is paramount.

[0003] Numerous small-diameter pipe weld seams at nuclear power plant sites require radiographic inspection. Currently, magnets or tape are commonly used to secure the radiographs, but this presents several challenges: the small pipe diameter makes it difficult to properly place the radiograph and image quality meter; using radiograph rings for binding results in a larger projected image of the weld; and the varying heights and complex locations of weld seams on site make it easy for magnets or tape to loosen or fall off, especially on stainless steel. These factors collectively lead to low efficiency and insufficient reliability in radiographic film placement for small-diameter pipe weld seams. Summary of the Invention

[0004] The purpose of this invention is to provide a modular radiographic inspection patch device to solve the problem that the current method of fixing with magnets or tape cannot meet the requirements of positioning accuracy, fixing stability and imaging quality for radiographic inspection of small-diameter pipe welds.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A modular radiographic testing patching device is provided, comprising: a patching slot, a radiographic film dark bag, a tube fixing device, and an image quality meter; The patch groove includes a base plate and baffles at the front and rear ends of the base plate; the upper surface of the base plate is a lead plate for preventing backscattering; A film bag is placed on the lead plate, and the film bag contains a film. The image quality meter is supported above the patch slot by an image quality meter support device, and forms a cantilever parallel to the surface of the base plate; the image quality meter support device is installed and fixed to one end baffle of the patch slot; The pipe fitting fixing device includes a base plate connector and a circular fastening device. The circular fastening device is fixed directly below the base plate through the base plate connector. The circular fastening device is used to clamp the pipe fitting to be tested and make its bottom fit against the X-ray film dark bag, while its top is located below the image quality meter.

[0006] To optimize the above technical solution, the specific limitations also include: The patch groove is rectangular, and the base plate connector is elongated, with its length direction aligned with that of the base plate of the patch groove. Both ends of the base plate connector extend out of the base plate of the patch groove. There are two annular fastening devices, which are respectively located at the left and right ends of the base plate connector.

[0007] Preferably, the lead plate has the same shape as the upper surface of the bottom plate of the patch groove, and the lead plate has a thickness of 5-8 mm.

[0008] A raised B-shaped lead character is provided on one corner of the lead plate away from the image quality meter.

[0009] Preferably, the annular fastening device has a hinged structure on one side and an openable buckle on the other side, which is fastened by bolts and butterfly nuts.

[0010] Furthermore, the inner side of the circular fastening device is also provided with an elastic retaining ring for clamping the pipe fitting to be tested, the elastic retaining ring being composed of an upper half ring and a lower half ring.

[0011] Preferably, the image quality meter support device is fixed to the outside of one end baffle of the patch slot by bolts, and the image quality meter support device is provided with a waist hole at the bolt fixing position for adjusting the height of the image quality meter support device.

[0012] Furthermore, the image quality meter is placed in close contact with the top of the pipe to be tested.

[0013] Preferably, the image quality meter support device is made of metal, and one end of the image quality meter is magnetically fixed to the image quality meter support device.

[0014] The width of the radiographic film dark bag is the same as the width of the bottom plate inside the mounting slot, and the front and rear ends of the radiographic film dark bag are limited by baffles at both ends.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This modular radiographic testing patch device utilizes a circular snap-fit ​​mechanism to adapt to and fix pipe fittings of different diameters, allowing for quick assembly and disassembly. It also features 360-degree rotation adjustment to align with the X-ray beam, improving inspection efficiency. Simultaneously, the patch groove provides a placement position for the small-diameter weld seam imaging dark bag, ensuring its flat placement and reducing weld seam projection distortion. The dark bag is positioned between the lead plate of the backscatter prevention device within the patch groove and the inspected pipe fitting, using the gap between them to secure the dark bag and prevent it from slipping.

[0016] In addition, the image quality meter patch device, made of metal, provides a magnetic adsorption object for the placement of the image quality meter. The screw fixing position of the image quality meter patch device has a waist-shaped hole, and the height of the device can be quickly adjusted by loosening the screw to adapt to the weld inspection of pipe fittings of different diameters. Attached Figure Description

[0017] Figure 1 : A schematic diagram of the modular radiographic testing patch device of this utility model. Figure 2 Top view of the modular radiographic testing patch device of this utility model without the installation of a dark bag for radiographic film.

[0018] In the diagram: 1-Patching groove, 2-Circular fastening device, 3-Lead plate, 4-B-shaped lead type, 5-Image quality meter support device, 6-Elastic retaining ring, 7-Dark bag for X-ray film, 8-Image quality meter, 9-Tube fixing device. Detailed Implementation

[0019] In the description of this utility model, it should be noted that: in this embodiment, for descriptive purposes, the orientation is vertical. Figure 1 The inside is the front, facing perpendicularly. Figure 1 The outer direction is the rear.

[0020] This invention provides a modular radiographic testing patch device, such as... Figure 1 As shown, it includes: a patch tray 1, a film dark bag 7, a tube fixing device 9, and an image quality meter 8.

[0021] The mounting slot 1 is rectangular and includes a base plate and baffles at the front and rear ends of the base plate. The upper surface of the base plate is a lead plate 3 for preventing backscattering. The mounting slot 1 is 180mm×110mm in size and is made of stainless steel plate with a thickness of 5mm. The front and rear ends of the base plate are welded with baffles of 10mm thickness. The mounting slot 1 can hold a substrate with a maximum size of 180mm×100mm.

[0022] A film bag 7 is placed on the lead plate 3, and the film bag 7 contains the film.

[0023] The shape of lead plate 3 is the same as the shape of the upper surface of the bottom plate of patch groove 1. The thickness of lead plate 3 is 5~8mm. The thickness of lead plate 3 can be selected to match the test pipe with different diameters. It and the bottom of the test pipe together hold the radiographic film dark bag.

[0024] In some implementations, such as Figure 2 As shown, a raised B-shaped letter 4 is provided on the corner of the lead plate 3 away from the image quality meter 8. Its height is 12.5mm and its thickness is 1.5mm. It is used to check whether the backscatter protection of the device is sufficient. If the backscatter protection is insufficient, a faint image of the B-shaped letter will appear on the film.

[0025] The pipe fitting fixing device 9 includes a base plate connector and a circular fastening device 2. The circular fastening device 2 is fixed directly below the base plate through the base plate connector. The circular fastening device 2 is used to clamp the pipe fitting to be tested and make its bottom fit against the X-ray film dark bag 7, with its top located below the image quality meter.

[0026] The base plate connector is long and narrow, and its direction is the same as the length direction of the base plate of the patch groove 1. Both ends of the base plate connector extend out of the base plate of the patch groove 1. There are two annular fastening devices 2, which are respectively set at the left and right ends of the base plate connector. It is suitable for straight pipe butt welds, and can also be fixed on one side to be suitable for bent pipe butt welds.

[0027] The circular snap-fit ​​device 2 has a hinged structure on one side and an openable snap-fit ​​on the other. The hinged side allows the snap-fit ​​ring to quickly engage or disengage from the pipe to be tested, enabling initial positioning without completely removing the bolts. This is suitable for scenarios with limited space or requiring frequent movement. The snap-fit ​​is secured with bolts and butterfly nuts, allowing for quick assembly and disassembly.

[0028] The inner side of the circular fastening device 2 is also provided with an elastic retaining ring 6 for clamping the pipe fitting to be tested. The elastic retaining ring 6 consists of an upper half ring and a lower half ring, so that the retaining ring has a certain deformation margin to compensate for the non-roundness of the pipe fitting, the weld excess height or the slight unevenness of the surface, and to ensure that the device can fit tightly against the pipe fitting to be tested and prevent loosening or slippage.

[0029] The image quality meter 8 is supported above the patch groove 1 by the image quality meter support device 5 and forms a cantilever parallel to the surface of the base plate. The image quality meter support device 5 is installed and fixed to one end baffle of the patch groove 1. The image quality meter 8 is close to the top of the pipe to be tested. Based on the image of the image quality meter 8 displayed on the film, the quality of the film image is judged, and the radiographic technique, film darkroom processing and defect inspection capability are evaluated.

[0030] The image quality indicator support device 5 is fixed to the outside of the baffle at one end of the patch groove 1 by bolts. The image quality indicator support device 5 has a waist hole at the bolt fixing position for adjusting the height of the image quality indicator support device 5. Loosening the screws can quickly adjust the height of the device to adapt to the inspection of welds of different pipe diameters.

[0031] In some embodiments, the image quality indicator support device 5 is inverted L-shaped and made of carbon steel. One end of the image quality indicator 8 is magnetically fixed to the image quality indicator support device 5, which ensures that it is firmly fixed and easy to disassemble, preventing the image quality indicator 8 from accidentally falling off during the inspection process.

[0032] The width of the film dark bag 7 is the same as the width of the bottom plate inside the mounting slot 1. The front and rear ends of the film dark bag 7 are limited by baffles at both ends.

[0033] The technical solution of this device will be further described below in conjunction with the specific implementation process: In a darkroom environment, the radiographic film is sealed and placed into the radiographic film bag 7. The thickness of the lead plate 3 is determined based on the diameter of the pipe to be tested, and it is fixedly installed in the mounting slot 1, with B-shaped lead type 4 simultaneously installed. The radiographic film bag 7 is placed in the mounting slot 1, and the modular radiographic inspection mounting device is fixed to the pipe to be tested using the pipe fixing device 9. The gap between the lead plate 3 and the bottom of the pipe to be tested is used to secure the radiographic film bag 7, preventing it from slipping. The image quality meter 8 is placed, and the height of the image quality meter support device 5 is quickly adjusted using screws to ensure that the image quality meter 8 is flush against the top of the pipe to be tested. Radiographic exposure is then performed. After the radiographic exposure is complete, the radiographic film bag 7 is removed from the mounting slot 1, and the radiographic film is opened and processed in a darkroom environment.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the present utility model's technical solution and based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A modular radiographic testing patch device, characterized in that, include: The film mounting tray (1), the film dark bag (7), the tube fixing device (9), and the image quality meter (8); The patch groove (1) includes a base plate and baffles at the front and rear ends of the base plate; the upper surface of the base plate is a lead plate (3) for preventing backscattering. A radiographic film dark bag (7) is placed on the lead plate (3), and the radiographic film is stored inside the radiographic film dark bag (7); The image quality meter (8) is supported above the patch groove (1) by the image quality meter support device (5) and forms a cantilever parallel to the surface of the base plate; the image quality meter support device (5) is installed and fixed to one end baffle of the patch groove (1); The pipe fitting fixing device (9) includes a base plate connector and a circular fastening device (2). The circular fastening device (2) is fixed directly below the base plate by the base plate connector. The circular fastening device (2) is used to clamp the pipe fitting to be tested and make its bottom fit the radiographic film dark bag (7) and its top located below the image quality meter (8).

2. The modular radiographic testing patch device according to claim 1, characterized in that: The patch groove (1) is rectangular, and the base plate connector is long and narrow, with the same direction as the length of the base plate of the patch groove (1). Both ends of the base plate connector extend out of the base plate of the patch groove (1). There are two annular fastening devices (2), which are respectively set at the left and right ends of the base plate connector.

3. The modular radiographic testing patch device according to claim 1, characterized in that: The lead plate (3) has the same shape as the upper surface of the bottom plate of the patch groove (1), and the lead plate (3) has a thickness of 5~8mm.

4. The modular radiographic testing patch device according to claim 1, characterized in that: A raised B-shaped lead character (4) is provided on one corner of the lead plate (3) away from the image quality meter (8).

5. The modular radiographic testing patch device according to claim 1, characterized in that: The circular fastening device (2) has a hinged structure on one side and an openable buckle on the other side, which is fastened by bolts and butterfly nuts.

6. The modular radiographic testing patch device according to claim 1, characterized in that: The inner side of the circular fastening device (2) is also provided with an elastic retaining ring (6) for clamping the pipe fitting to be tested. The elastic retaining ring (6) is composed of an upper half ring and a lower half ring.

7. The modular radiographic testing patch device according to claim 1, characterized in that: The image quality meter support device (5) is fixed to the outside of one end baffle of the patch groove (1) by bolts. The image quality meter support device (5) has a waist hole at the bolt fixing position for adjusting the height of the image quality meter support device (5).

8. The modular radiographic testing patch device according to claim 7, characterized in that: The image quality meter (8) is attached to the top of the pipe to be tested.

9. The modular radiographic testing patch device according to claim 1, characterized in that: The image quality meter support device (5) is made of metal, and one end of the image quality meter (8) is magnetically fixed to the image quality meter support device (5).

10. The modular radiographic testing patch device according to claim 1, characterized in that: The width of the radiographic film dark bag (7) is the same as the width of the bottom plate inside the mounting slot (1), and the front and rear ends of the radiographic film dark bag (7) are respectively limited by baffles at both ends.

Images