External container inner wall cleaning structure and cleaning method

Abstract

The application provides an external container inner wall cleaning structure and a cleaning method. The cleaning assembly is connected with the container. The cleaning assembly comprises: a laser light source, which is used for emitting a light beam. The emission frequency of the light beam of the laser light source is less than 1000 Hz. The energy of the light beam emitted by the laser light source ranges from 0.1 J to 100 J. A galvanometer component is used for receiving the light beam emitted by the laser light source and forming a cleaning light beam for cleaning the inner wall surface of the containing cavity. A wedge mirror assembly is arranged corresponding to the container port, so that the cleaning light beam enters the containing cavity after refraction through the wedge mirror assembly and irradiates on the inner wall surface of the containing cavity. A driving motor. The wedge mirror assembly is connected with the output shaft of the driving motor to drive the rotation of the wedge mirror assembly, so as to adjust the irradiation direction of the cleaning light beam passing through the wedge mirror assembly. The external container inner wall cleaning structure and the cleaning method solve the technical problem that the related art is difficult to clean the inner wall of the container.

Description

An external container inner wall cleaning structure and cleaning method Technical Field

[0001] This invention relates to the field of container testing technology, specifically to an external container inner wall cleaning structure and cleaning method. Background Technology

[0002] Uranium hexafluoride (UF6) is a fundamental nuclear material widely used in uranium enrichment and handling. With the rapid development of the nuclear power industry, UF6 production has increased year by year, leading to a rapid increase in the usage and processing volume of UF6 containers. UF6 containers are generally sealed, hollow containers with a right-angle valve and a plug at each end serving as the container's inlet.

[0003] According to industry standards, uranium hexafluoride containers must be cleaned and inspected when any of the following situations occur: "regular inspection and testing of containers; excessive residual amount in empty containers; change in the type (abundance) of container filling material; container maintenance; excessively high radiation dose rate on the container surface". Containers that pass the inspection can be reused, while those that fail are scrapped and temporarily stored.

[0004] The cleaning process for uranium hexafluoride containers requires a comprehensive inspection of the internal surfaces (inner walls). According to industry standards, the interior of the container should be clean, dry, and free of any contaminants. Visible surfaces such as valve passages should not have any corrosion marks, green spots, sediment, moisture, scratches, or white alkaline substances.

[0005] Currently, the cleaning of uranium hexafluoride containers employs a chemical reagent transfer cleaning method. The container is fixed on a large, rotating cleaning fixture, and cleaning liquid is injected into the container for transfer cleaning. The specific process flow is as follows: "Container weighing—hydrolysis (production water)—alkaline washing (a mixture of 5% sodium carbonate solution or 5% potassium carbonate solution and 27.5% or higher hydrogen peroxide)—water washing (production water)—rust removal (4.5%~10% oxalic acid solution)—hydraulic pressure test—blowing—baking—vacuum measurement."

[0006] While the above-described process for cleaning uranium hexafluoride containers can achieve satisfactory and comprehensive cleaning of the container's internal surface, it requires approximately three times the container's volume in water. Furthermore, the relatively low impact force of rotating water results in poor removal of scale-laden contaminants. The cleanliness of the uranium hexafluoride containers directly impacts the purity of the uranium hexafluoride feed, and the waste liquid generated from container cleaning accounts for approximately 80% of the total waste liquid from uranium enrichment plants. Treating uranium-containing waste liquid requires significant energy and financial investment and poses serious environmental risks.

[0007] Laser cleaning is a physical removal method that produces gaseous particles and solid waste without generating liquid waste. However, the two inlets (right-angle valve and plug) of the uranium hexafluoride container are both Z1” tapered thread interfaces, which are through holes with a very small diameter. Existing laser cleaning systems, due to their structural size limitations, cannot enter through such small inlets, making laser cleaning inside the container impossible. Furthermore, entering the container also carries the risk of contamination.

[0008] In conclusion, with the significant increase in the number of uranium hexafluoride containers requiring cleaning, existing cleaning equipment and methods are insufficient to meet the demands in terms of economic efficiency, environmental protection, cleaning efficiency, and safety. Summary of the Invention

[0009] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide an external container inner wall cleaning structure and cleaning method to solve the technical problem that it is difficult to clean the inner wall of a container in related technologies.

[0010] To achieve the above technical objectives, the present invention adopts the following technical solution: an external container inner wall cleaning structure, comprising: a container having a receiving cavity and a container opening communicating with the receiving cavity; the container opening includes a first container opening and a second container opening disposed opposite to each other; a cleaning assembly connected to the container, the cleaning assembly comprising: a laser source for emitting a laser beam, the laser source having an emission frequency of less than 1000Hz and an energy range of 0.1J to 100J for the laser beam emitted by the laser source; a galvanometer component for receiving the laser beam emitted by the laser source and forming a cleaning beam for cleaning the inner wall surface of the receiving cavity; a wedge mirror assembly disposed corresponding to the container opening, so that the cleaning beam enters the receiving cavity after being refracted by the wedge mirror assembly and irradiates the inner wall surface of the receiving cavity; and a drive motor, the wedge mirror assembly being connected to the output shaft of the drive motor to drive the wedge mirror assembly to rotate, thereby adjusting the irradiation direction of the cleaning beam passing through the wedge mirror assembly.

[0011] Furthermore, the wedge mirror assembly includes: a first wedge mirror, the first wedge mirror including a first incident surface and a first exit surface; a second wedge mirror, the second wedge mirror including a second incident surface and a second exit surface; the first exit surface and the second incident surface are arranged parallel to each other; the drive motor includes a first drive motor and a second drive motor; the output shaft of the first drive motor is connected to the first wedge mirror, and the output shaft of the second drive motor is connected to the second wedge mirror.

[0012] Furthermore, the external container inner wall cleaning structure also includes an adapter tube; the adapter tube is connected to the first container opening and / or the second container opening; the adapter tube is provided with a window plate, the window plate is a cylindrical structure, and the axis of the window plate coincides with the rotation axis of the second wedge mirror.

[0013] Furthermore, the external container inner wall cleaning structure also includes a rangefinder, which is used to emit a ranging beam into the cavity. After passing through the inner wall of the cavity, the ranging beam is emitted from the container opening. The rangefinder obtains distance information based on the ranging beam emitted from the container opening.

[0014] Furthermore, the external container inner wall cleaning structure also includes a detection component connected to the container. The detection component includes: an illumination component for emitting an illumination beam into the containment cavity; an imaging component for receiving the illumination beam reflected by the inner wall surface of the containment cavity and forming an image of the inner wall surface based on the illumination beam; and a focusing lens for adjusting the focal length of the illumination beam.

[0015] Furthermore, the external container inner wall cleaning structure includes a cleaning bicolor mirror, which includes: a cleaning bicolor mirror incident surface for allowing the illumination beam and the ranging beam to pass through the cleaning bicolor mirror incident surface; and a cleaning bicolor mirror exit surface, which is arranged opposite to the cleaning bicolor mirror incident surface, allowing the cleaning beam to be refracted through the cleaning bicolor mirror exit surface and reach the wedge mirror assembly.

[0016] Furthermore, the external container inner wall cleaning structure includes a first dichroic mirror, which is located on the side of the cleaning dichroic mirror away from the wedge mirror assembly. The first dichroic mirror includes: a first dichroic mirror incident surface; and a first dichroic mirror exit surface, which is used to allow the illumination beam refracted by the inner wall of the container to pass through the first dichroic mirror through the first dichroic mirror exit surface. The first dichroic mirror exit surface is used to allow the ranging beam to reach the cleaning dichroic mirror after being reflected by the first dichroic mirror exit surface.

[0017] Furthermore, the external container inner wall cleaning structure includes a second dichroic mirror, which includes: a second dichroic mirror incident surface for allowing the illumination beam to pass through the second dichroic mirror through the second dichroic mirror incident surface; and a second dichroic mirror exit surface for allowing the ranging beam to be refracted through the second dichroic mirror exit surface and reach the first dichroic mirror exit surface.

[0018] Furthermore, the external container inner wall cleaning structure includes: a first filter, located between a first dichroic mirror and a focusing lens, for filtering the illumination beam; and a second filter, located between a second dichroic mirror and a rangefinder, for filtering the ranging beam.

[0019] Furthermore, there are multiple first container ports, which are arranged alternately; there are also multiple second container ports, which are arranged alternately.

[0020] A cleaning method is applicable to the aforementioned external container inner wall cleaning structure. The cleaning method includes: dividing the inner wall surface of the container into a first inner wall surface corresponding to a first container opening and a second inner wall surface corresponding to a second container opening; installing a cleaning assembly at the first container opening and using a drive motor to rotate a wedge mirror assembly so that the cleaning beam emitted by the cleaning assembly scans the first inner wall surface; installing the cleaning assembly at the second container opening and using a drive motor to rotate the wedge mirror assembly so that the cleaning beam emitted by the cleaning assembly scans the second inner wall surface.

[0021] Beneficial effects:

[0022] 1. The external container inner wall cleaning structure and cleaning method of the present invention adopts laser cleaning method to realize laser cleaning of uranium hexafluoride container. No liquid wastewater is generated. The generated gaseous and solid wastes are easy to recycle and utilize. The structure is simple, the cleaning efficiency is high, the waste disposal cost is low, and it is economical and environmentally friendly.

[0023] 2. The external container inner wall cleaning structure and cleaning method of the present invention adopts pulse light source, galvanometer, double wedge mirror scanning, active illumination, laser ranging, dynamic focusing and imaging mode to achieve full coverage scanning laser cleaning of the container inner wall, making the whole system simple in structure, convenient to operate and low in cost.

[0024] 3. The external container inner wall cleaning structure and cleaning method of the present invention adopts an external double wedge mirror scanning method, which achieves full coverage without any cleaning equipment entering the container, thus avoiding the risk of equipment contamination and greatly improving the safety of the laser cleaning system.

[0025] 4. The external container inner wall cleaning structure and cleaning method of the present invention uses an optical window and an adapter tube to seal the two inlets of the container, which can effectively prevent the leakage of potentially harmful substances inside the container, and further ensure the safety of personnel during the cleaning process. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the external container inner wall cleaning structure used in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the cleaning assembly of the external container inner wall cleaning structure used in an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the wedge mirror assembly of the external container inner wall cleaning structure used in an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the structure of the bicolor mirror of the external container inner wall cleaning structure used in the embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the container structure of the external container inner wall cleaning structure used in an embodiment of the present invention.

[0031] The above figures include the following reference numerals:

[0032] 1. Window plate; 100. Container; 101. Receiving cavity; 110. Container opening; 102. First container opening; 103. Second container opening; 104. First inner wall surface; 105. Second inner wall surface; 10. First drive motor; 11. First wedge mirror; 111. First incident surface; 112. First exit surface; 2. Adapter cylinder; 12. First motor driver; 20. Second drive motor; 21. Second wedge mirror; 211. Second incident surface; 212. Second exit surface; 200. Cleaning assembly; 22. Second motor driver; 300. Wedge mirror assembly; 31. Cleaning 311. Cleaning the incident surface of the dichroic mirror; 312. Cleaning the exit surface of the dichroic mirror; 32. First dichroic mirror; 321. Incident surface of the first dichroic mirror; 322. Exit surface of the first dichroic mirror; 33. Second dichroic mirror; 331. Incident surface of the second dichroic mirror; 332. Exit surface of the second dichroic mirror; 400. Detection assembly; 41. First filter; 42. Focusing lens; 43. Imaging assembly; 51. Second filter; 52. Rangefinder; 6. Galvanometer assembly; 81. Output head; 82. Optical fiber cable; 83. Laser source; 90. Illumination assembly; 91. Control module. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0034] According to an embodiment of the present invention, an external container inner wall cleaning structure is provided, as shown in Figures 1 to 4, comprising: a container 100 having a receiving cavity 101 and a container opening 110 communicating with the receiving cavity 101; the container opening 110 includes a first container opening 102 and a second container opening 103 disposed opposite to each other; and a cleaning assembly 200 connected to the container 100, the cleaning assembly 200 including: a laser source 83 for emitting a light beam, the laser source 83 having an emission frequency of less than 1000Hz, and the energy of the light beam emitted by the laser source 83 being... The value range is 0.1J to 100J; galvanometer component 6, which is used to receive the beam emitted by the laser source 83 and form a cleaning beam for cleaning the inner wall surface of the receiving cavity 101; wedge mirror assembly 300, which is correspondingly arranged with the container opening 110 so that the cleaning beam enters the receiving cavity 101 after being refracted by the wedge mirror assembly 300 and irradiates the inner wall surface of the receiving cavity 101; drive motor, which is connected to the output shaft of the drive motor to drive the wedge mirror assembly 300 to rotate, thereby adjusting the irradiation direction of the cleaning beam obtained after passing through the wedge mirror assembly 300.

[0035] The external container inner wall cleaning structure of this embodiment emits a laser beam from a laser source 83, which enters the galvanometer component 6 to form a cleaning beam for cleaning the inner wall surface of the receiving cavity 101. After being refracted by the wedge mirror assembly 300, the cleaning beam enters the receiving cavity 101 through the container opening 110 and irradiates the inner wall surface of the receiving cavity 101. The wedge mirror assembly 300 is connected to the output shaft of the drive motor, driving the wedge mirror assembly 300 to rotate and adjust the irradiation direction of the cleaning beam obtained after passing through the wedge mirror assembly 300. This allows the cleaning beam to achieve laser cleaning of various areas through different irradiation directions, making the operation simple, time-saving, and labor-saving. The external container inner wall cleaning structure of this invention solves the technical problem of the difficulty in cleaning the inner wall of containers in related technologies.

[0036] Specifically, the laser source 83 is used to output pulsed laser light. The cleaning assembly 200 is also equipped with an output head 81 for collimating the pulsed light. The laser source 83 is connected to the output head via an optical fiber cable 82, which allows the output head 81 to receive the laser source 83 at a more flexible angle. The laser source 83 is a pulsed fiber laser that outputs pulsed laser light with a wavelength of L1. The output head 81 is a collimating output head that collimates the output pulsed laser light.

[0037] Specifically, by using the aforementioned laser source 83, the generated beam has greater energy than a normal beam. Similarly, the peak power of the pulsed laser is high, which allows for a larger diameter laser spot suitable for cleaning. The large diameter spot can be directly collimated into a laser.

[0038] Specifically, in some embodiments, the beam aperture of the laser source 83 is less than 25mm, and can be 5mm, 8mm, 10mm, etc.

[0039] Specifically, the galvanometer component 6 consists of one or two high-speed galvanometers, which can realize rapid scanning of the input cleaning beam to achieve a line spot or a narrow-band rectangular spot.

[0040] Referring to Figures 2 and 3, in the external container inner wall cleaning structure of this embodiment, the wedge mirror assembly 300 includes: a first wedge mirror 11, which includes a first incident surface 111 and a first exit surface 112; a second wedge mirror 21, which includes a second incident surface 211 and a second exit surface 212; the first exit surface 112 and the second incident surface 211 are arranged parallel to each other; the drive motor includes a first drive motor 10 and a second drive motor 20; the output shaft of the first drive motor 10 is connected to the first wedge mirror 11, and the output shaft of the second drive motor 20 is connected to the second wedge mirror 21. Each wedge mirror in the wedge mirror assembly 300 has one plane and one inclined plane with a wedge angle. That is, the initial positions of the first wedge mirror 11 and the second wedge mirror 21 are symmetrically placed, so that the emitted beam does not deflect. The emission frequency of the laser light source 83 is less than 1000Hz, and the energy range of the beam emitted by the laser light source 83 is 0.1J to 100J.

[0041] Specifically, the two surfaces of the first wedge mirror 11 and the second wedge mirror 21 are coated with a visible light band anti-reflection film. For a perpendicularly incident beam, the output angle changes. If the wedge mirror rotates one full turn, the output beam will rotate in a circle. The first wedge mirror 11 and the second wedge mirror 21 are placed sequentially to form a double wedge mirror group. With the parallel beam perpendicularly incident on the mirror group, by controlling the rotation of the two wedge mirrors, arbitrary trajectory scanning within a disk area can be achieved. By controlling the phase difference, the output beam can be scanned into a spiral disk. The first drive motor 10 and the second drive motor 20 repeatedly operate the first wedge mirror 11 and the second wedge mirror 21 to achieve disk area scanning and cleaning of the inner wall structure of the container 100.

[0042] Specifically, the first wedge mirror 11 and the second wedge mirror 21, the first drive motor 10, the second drive motor 20, and the first motor driver 12 and the second motor driver 22 constitute an optical scanning module. The two wedge mirrors are respectively mounted on the hollow rotating shafts inside the two drive motors. The first motor driver 12 and the second motor driver 22 are connected to and control the first drive motor 10 and the second drive motor 20.

[0043] Specifically, the first drive motor 10 and the second drive motor 20 are hollow, high-precision ring motors. The hollow part is used to install the wedge mirror and can drive the wedge mirror to rotate. There is a position sensor on the motor.

[0044] The first motor driver 12 and the second motor driver 22 control the motor. Through electronic control signals, they control the rotation speed and direction of the motor. They can also obtain the position of the motor shaft through the position sensor on the motor.

[0045] Referring to Figure 2, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure also includes an adapter cylinder 2; the adapter cylinder 2 is connected to the first container opening 102 and the second container opening 103; a window plate 1 is provided on the adapter cylinder 2, the window plate 1 is a cylindrical structure, and the axis of the window plate 1 coincides with the rotation axis of the second wedge mirror 21. The adapter cylinder 2 has a tapered external thread, which mates with the tapered thread of the container 100 inlet, and is installed to the first container opening 102 and the second container opening 103 of the container 100. The adapter cylinder 2 has a hollow structure inside, in the middle for installing the window plate 1, and the two surfaces of the window plate 1 are coated with a visible light band anti-reflection film. The axis of the window plate 1 coincides with the rotation axis of the second wedge mirror 21, so that the emitted illumination beam does not deflect in direction.

[0046] In some embodiments, when the adapter tube 2 is installed on the container, the window piece 1 can seal the container opening 110 to prevent the smoke and dust generated during cleaning from escaping.

[0047] In some external container inner wall cleaning structures of this embodiment, the wall cleaning structure further includes an adapter cylinder 2; the adapter cylinder 2 is connected to the first container port 102 or the second container port 103. During operation, laser cleaning is first performed at one container port, and then laser cleaning is performed at the corresponding other container port. The areas cleaned in the two processes are combined to obtain the entire cleaning area of ​​a receiving cavity 101.

[0048] Referring to Figure 2, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure further includes: a rangefinder 52, which is used to emit a ranging beam into the receiving cavity 101. After passing through the receiving cavity 101, the ranging beam exits from the container opening 110. The rangefinder 52 obtains distance information based on the ranging beam exiting from the container opening 110.

[0049] Specifically, the rangefinder 52 is a laser ranging module that uses the phase method for laser ranging. It emits a monochromatic laser beam with a wavelength of L2. The laser light source illuminates the surface of the object and reflects back to the laser rangefinder 52, thus measuring the distance.

[0050] Specifically, the rangefinder 52 has a measurement accuracy of 0.1mm, a measurement range of 0.1m-30m, a frequency of 25Hz, a wavelength of 635nm, and a spot diameter of 7mm.

[0051] Referring to Figure 2, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure further includes a detection component 400, which is connected to the container 100. The detection component 400 includes: an illumination component 90 for emitting an illumination beam into the receiving cavity 101; an imaging component 43 for receiving the illumination beam reflected by the inner wall surface of the receiving cavity 101 and forming an image of the inner wall surface based on the illumination beam; and a focusing lens 42 for adjusting the focal length of the illumination beam.

[0052] Specifically, the focusing lens 42 is a liquid lens that dynamically adjusts the focal length by controlling the current and voltage, enabling very rapid dynamic adjustment of the focal length. Combined with the imaging assembly 43, it allows for rapid imaging at different distances. The imaging assembly 43 is an industrial camera CCD, which can be either a monochrome or color camera.

[0053] Specifically, the illumination component 90 illuminates a white light source or a monochromatic light source and outputs an illumination beam. The illumination beam is a large-aperture beam with a certain divergence angle, which provides illumination to the internal area of ​​the container 100, enabling the camera to perform imaging observation of the illuminated area.

[0054] Specifically, the control module 91 centrally controls the laser light source 83, the galvanometer component 6, the first motor driver 12, the second motor driver 22, the lighting component 90, the rangefinder 52, and the focusing lens 42, and connects to them respectively through corresponding cables.

[0055] Referring to Figure 4, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure includes a cleaning dichroic mirror 31. The cleaning dichroic mirror 31 includes: a cleaning dichroic mirror incident surface 311, which allows the illumination beam and the ranging beam to pass through the cleaning dichroic mirror 31; and a cleaning dichroic mirror exit surface 312, which is disposed opposite to the cleaning dichroic mirror incident surface 311. The cleaning beam is refracted by the cleaning dichroic mirror exit surface 312 and reaches the wedge mirror assembly 300.

[0056] The illumination beam and the ranging beam pass through the cleaning dichroic mirror 311 through the incident surface 311 of the cleaning dichroic mirror. After being refracted through the exit surface 312 of the cleaning dichroic mirror, the cleaning beam reaches the wedge mirror assembly 300.

[0057] Specifically, the cleaning dichroic mirror 31 is placed at a 45° angle, exhibiting high reflectivity to pulsed laser (L1) and high transmittance to illumination beams and rangefinder lasers (L2). This is achieved by coating two surfaces with optical dielectric films: the incident surface 311 of the cleaning dichroic mirror is coated with a visible light band antireflection film, while the exit surface 312 is coated with a high reflectivity film for the L1 band and a high transmittance film for other visible light bands.

[0058] Referring to Figure 4, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure includes a first dichroic mirror 32, which is located on the side of the cleaning dichroic mirror 31 away from the wedge mirror assembly 300. The first dichroic mirror 32 includes: a first dichroic mirror incident surface 321; and a first dichroic mirror exiting surface 322, which is used to allow the illumination beam refracted by the inner wall of the container 100 to pass through the first dichroic mirror 32 after passing through the first dichroic mirror exiting surface 322. The first dichroic mirror exiting surface 322 is used to allow the ranging beam to reach the cleaning dichroic mirror 31 after being reflected by the first dichroic mirror exiting surface 322. The illumination beam passes through the first dichroic mirror 32 after passing through the first dichroic mirror exiting surface 322, and the ranging beam reaches the cleaning dichroic mirror 31 after being reflected by the first dichroic mirror exiting surface 322.

[0059] Specifically, the first dichroic mirror 32 is placed at a 45° angle, and it is semi-reflective and semi-transparent to the illumination beam and highly reflective to the rangefinder laser (L1). This is achieved by coating two surfaces with optical dielectric films: the exit surface 322 of the first dichroic mirror is coated with a semi-reflective and semi-transparent film in the visible light band and a high reflective film in the L2 band, while the incident surface 321 of the first dichroic mirror is coated with a high-transmittance film in the visible light band.

[0060] Referring to Figure 4, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure includes a second dichroic mirror 33. The second dichroic mirror 33 includes: a second dichroic mirror incident surface 331, used to allow the illumination beam to pass through the second dichroic mirror 33 through the second dichroic mirror incident surface 331; and a second dichroic mirror exit surface 332, used to allow the ranging beam to be refracted after passing through the second dichroic mirror exit surface 332 and reach the first dichroic mirror exit surface 322. The illumination beam passes through the second dichroic mirror 33 through the second dichroic mirror incident surface 331, and the ranging beam is refracted after passing through the second dichroic mirror exit surface 332 and reaches the first dichroic mirror exit surface 322.

[0061] Specifically, the second dichroic mirror 33 is placed at a 45° angle, which has high transmittance for illumination light and high reflectance for the rangefinder laser (L2). This is achieved by coating two surfaces with optical dielectric films: the incident surface 331 of the second dichroic mirror is coated with a visible light band antireflection film, and the exit surface 332 of the second dichroic mirror is coated with a high reflectance film for the L2 band and a high transmittance film for other visible light bands.

[0062] Referring to Figures 2 and 4, in the external container inner wall cleaning structure of this embodiment, the external container inner wall cleaning structure includes: a first filter 41, located between the first dichroic mirror 32 and the focusing lens 42, to filter the illumination beam; and a second filter 51, located between the second dichroic mirror 33 and the rangefinder 52, to filter the ranging beam. The first filter 41 is a narrowband filter with low transmittance in the L2 band and high transmittance in other bands, preventing the laser beam L2 of the rangefinder 52 from passing through, while allowing the illumination light source beam to pass through efficiently. This prevents the illumination beam from interfering with the imaging component 43's imaging, ensuring clear imaging of the illuminated area by the imaging component 43. The second filter 51 is a bandpass narrowband filter with high transmittance in the L2 band and low transmittance in other bands. This allows the laser beam L2 of the rangefinder 52 to be transmitted efficiently, while the beam of the illumination source cannot pass through, thus ensuring the ranging accuracy and precision of the rangefinder 52.

[0063] Referring to Figure 1, in the external container inner wall cleaning structure of this embodiment, there are multiple first container ports 102, which are arranged alternately; there are also multiple second container ports 103, which are arranged alternately. Conventionally, the first container ports 102 are used as channels for the cleaning beam to enter the receiving cavity 101, and the second container ports 103 are used as exhaust ports to discharge gaseous particles and dust generated by laser cleaning out of the container 100. Multiple first container ports 102 can be provided depending on the actual situation, and multiple cleaning components 200 can be used to clean the inner wall of the container 100 respectively; multiple second container ports 103 can also be provided to extract gaseous particles and dust generated inside.

[0064] Referring to Figure 5, the cleaning method in this embodiment includes the aforementioned external container inner wall cleaning structure. The cleaning method includes: dividing the inner wall surface of the container 100 into a first inner wall surface 104 corresponding to the first container opening 102 of the container 100 and a second inner wall surface 105 corresponding to the second container opening 103 of the container 100; installing the cleaning assembly 200 at the first container opening 102, and using a drive motor to drive the wedge mirror assembly 300 to rotate so that the cleaning beam emitted by the cleaning assembly 200 scans the first inner wall surface 104; installing the cleaning assembly 200 at the second container opening 103, and using a drive motor to drive the wedge mirror assembly 300 to rotate so that the cleaning beam emitted by the cleaning assembly 200 scans the second inner wall surface 105. When the cleaning assembly 200 is installed at the first container opening 102, the drive motor drives the wedge mirror assembly 300 to rotate, so that the cleaning beam emitted by the cleaning assembly 200 scans the first inner wall surface 104. When the cleaning assembly 200 is installed at the second container opening 103, the wedge mirror assembly 300 rotates, so that the cleaning beam emitted by the cleaning assembly 200 scans the second inner wall surface 105, thereby completing the scanning and cleaning work of the two inner wall surfaces of the container 100.

[0065] Specifically, in this embodiment, the first inner wall surface 104 is the area encompassed by the path passing through the CBD in the figure. The second inner wall surface 105 is the area encompassed by the path passing through the CAD in the figure.

[0066] The cleaning method in this embodiment includes the following processes and steps:

[0067] 1. Installation of the external container inner wall cleaning structure and the uranium hexafluoride container.

[0068] The uranium hexafluoride container is placed horizontally and secured. The auxiliary components of the right-angle valve and plug inlet are removed. Adapter cylinders 2 are installed into the two inlets, with a mounting window 1 in the middle of the adapter cylinder 2. The wedge mirror assembly 300 of the cleaning structure is aligned with one of the inlets, serving as the first container opening 102. The wedge mirror assembly 300 is adjusted to ensure that it is placed on the same optical axis as the window 1. The first wedge mirror 11 and the second wedge mirror 21 of the wedge mirror assembly 300 are adjusted to their initial positions.

[0069] 2. Laser ranging methods and procedures

[0070] The control module 91 sends a command to turn on the rangefinder 52 and emit a rangefinding laser beam. The laser beam is transmitted through the second filter 51, and then passes through the second dichroic mirror 33 and the first dichroic mirror 32 in sequence. After high reflection, the laser beam passes through the cleaning dichroic mirror 31, the wedge mirror assembly 300 and the window 1, and is incident on a certain point directly in front of the container. It is reflected at that point on the container surface. After reflection, the beam passes through the window 1, the wedge mirror assembly 300 and the cleaning dichroic mirror 31 in sequence, and then passes through the first dichroic mirror 32 and the second dichroic mirror 33 for reflection, and returns to the rangefinder 52. After data processing, the distance information is obtained and then transmitted to the control module 91.

[0071] 3. Laser cleaning methods and procedures

[0072] After passing through the shaping module, the laser beam is collimated and expanded to output a parallel laser beam. This parallel beam is then rapidly scanned into a line spot by a galvanometer, reflected by the first dichroic mirror 32, and then passed through two wedge mirrors and window 1 before being incident on the inner surface of container 100. The pulsed laser beam removes uranium hexafluoride residue from the inner wall surface of the container. The resulting gaseous particles and dust are discharged from the container via exhaust gas extraction, thus achieving the laser cleaning process.

[0073] 4. Beam illumination methods and procedures

[0074] The control module 91 sends a command to turn on the lighting component 90 and output a lighting beam. The lighting beam is transmitted through the second dichroic mirror 33 and then partially reflected by the first dichroic mirror 32. The reflected lighting beam passes through the wedge mirror component 300 and the window 1 and is incident on the front area inside the container to illuminate that area.

[0075] 5. Optical Imaging Methods and Procedures

[0076] The control module 91 sends a command to open the imaging component 43 and the focusing lens 42. Based on the obtained ranging information, it calculates a focusing length signal and sends it to the focusing lens 42 to quickly adjust the lens focal length. The reflected light beam from the illumination area passes sequentially through the window 1, wedge mirror assembly 300, cleaning dichroic mirror 31, first dichroic mirror 32, and first filter 41, and then is imaged onto the photosensitive surface of the imaging component 43 by the focusing lens 42, thus achieving imaging by the imaging component 43. The collected imaging data is transmitted to the control module 91.

[0077] 6. Rotational scanning method and procedures for wedge mirror assembly

[0078] Commands are sent via control module 91 to activate the first drive motor 10, the second drive motor 20, the first motor driver 12, and the second motor driver 22. The drive motors rotate, and the wedge mirrors follow suit, controlling the two wedge mirrors to rotate with a specific phase difference. A circular area is formed by the rotation scanning through the pulsed laser beam, ranging laser beam, and illumination beam following the wedge mirrors.

[0079] 7. Full-coverage cleaning and scanning method

[0080] First, the external container inner wall cleaning structure is installed at position A. Laser light enters from end A and exhausts from end D, enabling scanning, cleaning, illumination, and imaging of the CBD region inside the uranium hexafluoride container. Then, the external container inner wall cleaning structure is installed at position B. Laser light enters from end B and exhausts from end A, enabling scanning, cleaning, illumination, and imaging of the CAD region inside the uranium hexafluoride container. Ultimately, this achieves full-coverage laser cleaning of the entire internal surface of the container.

[0081] 8. Imaging data processing and detection

[0082] The images captured during the two scanning processes are stitched together, and surface rendering is performed based on the 3D structural model of the container to obtain 3D graphic data and provide detection conclusions.

[0083] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0084] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0085] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0086] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0087] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An external container inner wall cleaning structure, characterized in that, include: A container (100) having a receiving cavity (101) and a container opening (110) communicating with the receiving cavity (101); the container opening (110) includes a first container opening (102) and a second container opening (103) disposed opposite to each other; a cleaning assembly (200) connected to the container (100), the cleaning assembly (200) including: a laser source (83) for emitting a light beam, the emission frequency of the light beam of the laser source (83) being less than 1000Hz, and the energy of the light beam emitted by the laser source (83) ranging from 0.1J to 100J; and a galvanometer component (6) for receiving the laser source. (83) The emitted light beam forms a cleaning light beam for cleaning the inner wall surface of the receiving cavity (101); a wedge mirror assembly (300) is provided corresponding to the container opening (110) so that the cleaning light beam enters the receiving cavity (101) after being refracted by the wedge mirror assembly (300) and irradiates the inner wall surface of the receiving cavity (101); a drive motor is connected to the output shaft of the drive motor to drive the wedge mirror assembly (300) to rotate, thereby adjusting the irradiation direction of the cleaning light beam passing through the wedge mirror assembly (300); the wedge mirror assembly (300) includes: a first wedge mirror (11), the first wedge mirror (11) including a first incident surface (11 1) and a first exit surface (112); a second wedge mirror (21), the second wedge mirror (21) including a second incident surface (211) and a second exit surface (212); the first exit surface (112) and the second incident surface (211) are arranged parallel to each other; the drive motor includes a first drive motor (10) and a second drive motor (20); the output shaft of the first drive motor (10) is connected to the first wedge mirror (11), and the output shaft of the second drive motor (20) is connected to the second wedge mirror (21); the external container inner wall cleaning structure further includes: a rangefinder (52), the rangefinder (52) is used to emit a ranging beam into the receiving cavity (101), the ranging beam passing through After passing through the inner wall of the receiving cavity (101), the light beam is emitted from the container opening (110). The rangefinder (52) obtains distance information based on the rangefinder beam emitted from the container opening (110). The external container inner wall cleaning structure also includes a detection component (400), which is connected to the container (100). The detection component (400) includes: an illumination component (90) for emitting an illumination beam into the receiving cavity (101); an imaging component (43) for receiving the illumination beam reflected by the inner wall surface of the receiving cavity (101) and forming an image of the inner wall surface based on the illumination beam; and a focusing lens (42) for adjusting the focal length of the illumination beam.

2. The external container inner wall cleaning structure according to claim 1, characterized in that, The external container inner wall cleaning structure also includes an adapter tube (2); the adapter tube (2) is connected to the first container opening (102) and / or the second container opening (103); the adapter tube (2) is provided with a window piece (1), the window piece (1) is a cylindrical structure, and the axis of the window piece (1) coincides with the rotation axis of the second wedge mirror (21).

3. The external container inner wall cleaning structure according to claim 2, characterized in that, The external container inner wall cleaning structure includes a cleaning bicolor mirror (31), which includes: a cleaning bicolor mirror incident surface (311) for allowing the illumination beam and the ranging beam to pass through the cleaning bicolor mirror (311) through the cleaning bicolor mirror incident surface (311); and a cleaning bicolor mirror exit surface (312) opposite to the cleaning bicolor mirror incident surface (311), which allows the cleaning beam to be refracted through the cleaning bicolor mirror exit surface (312) and reach the wedge mirror assembly (300).

4. The external container inner wall cleaning structure according to claim 3, characterized in that, The external container inner wall cleaning structure includes a first bicolor mirror (32), which is located on the side of the cleaning bicolor mirror (31) away from the wedge mirror assembly (300). The first bicolor mirror (32) includes: a first bicolor mirror incident surface (321); and a first bicolor mirror exit surface (322), which allows the illumination beam reflected by the inner wall of the container (100) to pass through the first bicolor mirror (322). The first bicolor mirror exit surface (322) allows the ranging beam to reach the cleaning bicolor mirror (31) after being reflected by the first bicolor mirror exit surface (322).

5. The external container inner wall cleaning structure according to claim 4, characterized in that, The external container inner wall cleaning structure includes a second dichroic mirror (33), which includes: a second dichroic mirror incident surface (331) for allowing the illumination beam to pass through the second dichroic mirror (33) through the second dichroic mirror incident surface (331); and a second dichroic mirror exit surface (332) for allowing the ranging beam to be refracted through the second dichroic mirror exit surface (332) and reach the first dichroic mirror exit surface (322).

6. The external container inner wall cleaning structure according to claim 5, characterized in that, The external container inner wall cleaning structure includes: a first filter (41), which is located between the first dichroic mirror (32) and the focusing lens (42) to filter the illumination beam; and a second filter (51), which is located between the second dichroic mirror (33) and the rangefinder (52) to filter the ranging beam.

7. The external container inner wall cleaning structure according to claim 1, characterized in that, There are multiple first container ports (102), and the multiple first container ports (102) are arranged at intervals; there are multiple second container ports (103), and the multiple second container ports (103) are arranged at intervals.

8. A cleaning method applicable to an external container inner wall cleaning structure as described in any one of claims 1 to 7, characterized in that, The cleaning method includes: dividing the inner wall of the container (100) into a first inner wall surface (104) corresponding to the first container opening (102) of the container (100) and a second inner wall surface (105) corresponding to the second container opening (103) of the container (100); installing the cleaning assembly (200) at the first container opening (102), and using a drive motor to drive the wedge mirror assembly (300) to rotate so that the cleaning beam emitted by the cleaning assembly (200) scans the first inner wall surface (104); installing the cleaning assembly (200) at the second container opening (103), and using a drive motor to drive the wedge mirror assembly (300) to rotate so that the cleaning beam emitted by the cleaning assembly (200) scans the second inner wall surface (105).

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