Inner wall cleaning structure and cleaning method

Abstract

The application provides an inner wall cleaning structure and a cleaning method, which comprise a container, a containing cavity and a container port; a cleaning assembly connected with the container, the cleaning assembly comprising a laser light source for emitting a light beam; a galvanometer component 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 focusing module located between the laser light source and the galvanometer component to adjust the focal length of the light beam entering the galvanometer component; a wedge mirror assembly arranged corresponding to the container port to make the cleaning light beam enter the containing cavity after refraction by the wedge mirror assembly and irradiate on the inner wall surface of the containing cavity; and a driving motor, the wedge mirror assembly being connected with the output shaft of the driving motor to drive the rotation of the wedge mirror assembly and thereby adjust the irradiation direction of the cleaning light beam passing through the wedge mirror assembly. The 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

TECHNICAL FIELD

[0001] The present application relates to the technical field of container detection, and in particular to an inner wall cleaning structure and a cleaning method. BACKGROUND

[0002] Uranium hexafluoride is a basic nuclear material, which is widely used in uranium enrichment and turnover. With the rapid development of nuclear power industry, the production of uranium hexafluoride is increasing year by year, and the use amount and processing task amount of the uranium hexafluoride container are also rapidly increasing. The uranium hexafluoride container is generally a closed hollow container, and there is a "right angle valve" and a "plug" at both ends of the container as the inlet of the container.

[0003] According to the provisions of the industry standard, when there is any one of the following situations: "periodic inspection and experiment of the container; residual amount of the empty container exceeds the standard; change of the container loading variety (abundance); maintenance of the container; and surface radiation dose rate of the container is too high", the uranium hexafluoride container needs to be cleaned and inspected, and the qualified container can be reused, and the unqualified container is scrapped and sent to temporary storage.

[0004] The cleaned uranium hexafluoride container needs to be inspected, and the inner surface (inner wall) of the container needs to be comprehensively inspected. According to the requirements of the industry standard, the inside of the container should be clean, dry and free of any pollutants; the visible surface of the valve channel should be free of corrosion marks, green spots, precipitates, moisture, scratches and white alkaline substances.

[0005] At present, the uranium hexafluoride container is cleaned by using a chemical reagent transfer cleaning method. The container is fixed on a self-rotating and rotating large container cleaning clamp, and a cleaning liquid is injected into the container for transfer cleaning. The specific process flow is: "container weighing - hydrolysis (production water) - alkali washing (5% sodium carbonate solution or 5% potassium carbonate solution mixed with 27.5% or more hydrogen peroxide solution) - water washing (production water) - rust removal (4.5%-10% oxalic acid solution) - water pressure test - blow drying - drying - vacuum measurement".

[0006] Although the above process flow can be used to clean the uranium hexafluoride container, the inner surface of the container can be fully cleaned, but the water consumption is about three times the volume of the container. In addition, due to the small impact force of the rotating water, the removal ability of the dirt with scale is poor. However, the cleaning degree of the uranium hexafluoride container affects the purity of the uranium hexafluoride loading product, and the waste liquid generated by the container cleaning accounts for about 80% of the total waste liquid of the uranium enrichment plant. The treatment of the uranium-containing waste liquid needs to consume a large amount of energy and funds, and there is a very serious environmental risk.

[0007] Laser cleaning is a physical removal method, forming gaseous particles and solid waste, without the generation of waste liquid. However, the two inlets (right angle valve and plug) of the uranium hexafluoride container are Z1" conical threaded interfaces, and the structure is a small diameter through hole. Due to the size limitation of the existing laser cleaning system, it is difficult to enter from such a small inlet, and the laser cleaning inside the container cannot be realized. In addition, there is a risk of contamination when entering the container.

[0008] In summary, with the large increase in the number of uranium hexafluoride containers to be cleaned, the existing cleaning device and method are difficult to meet the demand in terms of economy, environmental protection, cleaning efficiency and safety. SUMMARY

[0009] The purpose of the present application is to overcome the above technical deficiencies and provide an inner wall cleaning structure and a cleaning method to solve the technical problem that the related art is difficult to clean the inner wall of the container.

[0010] To achieve the above technical purpose, the following technical scheme is adopted: an inner wall cleaning structure, comprising: a container, the container having a containing cavity and a container port communicating with the containing cavity; the container port comprises a first container port and a second container port arranged opposite to each other; the first container port is arranged opposite to the second container port; a cleaning assembly connected with the container, the cleaning assembly comprising: a laser light source for emitting a light beam; a galvanometer component 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 focusing module between the laser light source and the galvanometer component to adjust the focal length of the light beam entering the galvanometer component; a wedge mirror assembly corresponding to the container port is arranged to make the cleaning light beam refract through the wedge mirror assembly and enter the containing cavity and irradiate on the inner wall surface of the containing cavity; a drive motor, the wedge mirror assembly is connected with the output shaft of the drive motor to drive the wedge mirror assembly to rotate and adjust the irradiation direction of the cleaning light beam passing through the wedge mirror assembly.

[0011] Further, the wedge mirror assembly comprises: a first wedge mirror comprising a first incident surface and a first exit surface; a second wedge mirror comprising a second incident surface and a second exit surface; the first exit surface and the second incident surface are arranged in parallel to each other; the drive motor comprises a first drive motor and a second drive motor; the output shaft of the first drive motor is connected with the first wedge mirror, and the output shaft of the second drive motor is connected with the second wedge mirror.

[0012] Further, the inner wall cleaning structure further comprises an adapter cylinder; the adapter cylinder is connected with the first container port and / or the second container port; a window piece is arranged on the adapter cylinder, the window piece is a cylindrical structure, and the axis of the window piece coincides with the rotation axis of the second wedge mirror.

[0013] Further, the inner wall cleaning structure further comprises a range finder, the range finder is configured to emit a ranging light beam into the accommodating cavity, the ranging light beam is emitted out of the container port after passing through the inner wall surface, and the range finder obtains distance information according to the ranging light beam emitted out of the container port, so that the focusing module adjusts the focal length of the light beam entering the galvanometer component according to the distance information.

[0014] Further, the inner wall cleaning structure further comprises a control module, the control module is in signal connection with the range finder, the control module calculates according to the distance information to obtain focal length information, and transmits the focal length information to the focusing module, so that the focusing module adjusts the focal length according to the focal length information.

[0015] Further, the inner wall cleaning structure further comprises a detection assembly, the detection assembly is connected with the container, and the detection assembly comprises: an illumination assembly configured to emit an illumination light beam into the accommodating cavity; an imaging assembly configured to receive the illumination light beam reflected by the inner wall surface of the accommodating cavity and form an image of the inner wall surface according to the illumination light beam; and a focusing lens in signal connection with the control module to adjust the focal length of the illumination light beam.

[0016] Further, the inner wall cleaning structure comprises a cleaning dichroic mirror, the cleaning dichroic mirror comprises: a cleaning dichroic mirror incident surface configured to allow the illumination light beam and the ranging light beam to penetrate the cleaning dichroic mirror through the cleaning dichroic mirror incident surface; and a cleaning dichroic mirror exit surface arranged opposite to the cleaning dichroic mirror incident surface, the cleaning dichroic mirror exit surface is configured to allow the cleaning light beam to refract through the cleaning dichroic mirror exit surface and then reach the wedge lens assembly.

[0017] Further, the inner wall cleaning structure comprises a first dichroic mirror, the first dichroic mirror is located on the side of the cleaning dichroic mirror away from the wedge lens assembly; the first dichroic mirror comprises: a first dichroic mirror incident surface configured to allow the illumination light beam to penetrate the first dichroic mirror through the first dichroic mirror incident surface; and a first dichroic mirror exit surface configured to allow the illumination light beam to penetrate the first dichroic mirror through the first dichroic mirror exit surface, and the first dichroic mirror exit surface is configured to allow the ranging light beam to reflect through the first dichroic mirror exit surface and then reach the cleaning dichroic mirror.

[0018] Further, the inner wall cleaning structure comprises a second dichroic mirror, the second dichroic mirror comprises: a second dichroic mirror incident surface configured to allow the illumination light beam to penetrate the second dichroic mirror through the second dichroic mirror incident surface; and a second dichroic mirror exit surface configured to allow the ranging light beam to refract through the second dichroic mirror exit surface and then reach the first dichroic mirror exit surface.

[0019] Further, the inner wall cleaning structure comprises: a first filter located between the first dichroic mirror and the focusing lens to filter the illumination light beam; and a second filter located between the second dichroic mirror and the range finder to filter the ranging light beam.

[0020] Further, the first container port is multiple, and the multiple first container ports are arranged at intervals; the second container port is multiple, and the multiple second container ports are arranged at intervals.

[0021] A cleaning method suitable for the inner wall cleaning structure, the cleaning method comprising: dividing the inner wall surface of the container into a first inner wall surface corresponding to the first container port of the container and a second inner wall surface corresponding to the second container port of the container; installing the cleaning assembly at the first container port, and rotating the wedge mirror assembly by the driving motor to enable the cleaning assembly to scan the first inner wall surface with the cleaning light beam; and installing the cleaning assembly at the second container port, and rotating the wedge mirror assembly by the driving motor to enable the cleaning assembly to scan the second inner wall surface with the cleaning light beam.

[0022] Advantages:

[0023] 1. The inner wall cleaning structure and the cleaning method adopt a laser cleaning method, realize laser cleaning of the uranium hexafluoride container, do not generate liquid waste water, the generated gaseous and solid waste is convenient for recycling and utilization, the structure is simple, the cleaning efficiency is high, the waste disposal cost is low, and the method is economic and environmentally friendly.

[0024] 2. The inner wall cleaning structure and the cleaning method adopt a pulse light source, a galvanometer, double-wedge mirror scanning, active illumination, laser ranging, dynamic focusing and imaging mode, realize full-coverage scanning laser cleaning of the inner wall of the container, and the whole system is simple in structure, convenient in operation and low in cost.

[0025] 3. The inner wall cleaning structure and the cleaning method adopt an external double-wedge mirror scanning mode, realize full coverage, and do not enter the container interior, so that the risk of contamination of the equipment is avoided, and the safety of the laser cleaning system is greatly improved.

[0026] 4. The inner wall cleaning structure and the cleaning method adopt an optical window and an adapter tube to seal the two entrances of the container, can effectively prevent the leakage of harmful substances possibly remaining in the container, and further ensure the safety of personnel in the cleaning process. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure schematic view of the inner wall cleaning structure adopted by the embodiment of the present application;

[0028] Figure 2 is a structure schematic view of the cleaning assembly of the inner wall cleaning structure adopted by the embodiment of the present application;

[0029] Figure 3 is a structure schematic view of the wedge mirror assembly of the inner wall cleaning structure adopted by the embodiment of the present application;

[0030] Figure 4is a structural schematic view of a dichroic mirror of the inner wall cleaning structure adopted by the embodiment of the present application;

[0031] Figure 5 is a structural schematic view of a container of the inner wall cleaning structure adopted by the embodiment of the present application.

[0032] Among them, the above-mentioned drawings include the following reference signs:

[0033] 1, window sheet; 100, container; 101, containing cavity; 110, container port; 102, first container port; 103, second container port; 104, first inner wall surface; 105, second inner wall surface; 10, first driving motor; 11, first wedge mirror; 111, first incident surface; 112, first emergent surface; 2, adapter cylinder; 12, first motor driver; 20, second driving motor; 21, second wedge mirror; 211, second incident surface; 212, second emergent surface; 200, cleaning assembly; 22, second motor driver; 300, wedge mirror assembly; 31, cleaning dichroic mirror; 311, cleaning dichroic mirror incident surface; 312, cleaning dichroic mirror emergent surface; 32, first dichroic mirror; 321, first dichroic mirror incident surface; 322, first dichroic mirror emergent surface; 33, second dichroic mirror; 331, second dichroic mirror incident surface; 332, second dichroic mirror emergent surface; 400, detection assembly; 41, first filter; 42, focusing lens; 43, imaging assembly; 51, second filter; 52, range finder; 6, galvanometer component; 7, focusing module; 81, output head; 82, optical fiber cable; 83, laser light source; 90, illumination assembly; 91, control module. DETAILED DESCRIPTION

[0034] In order for those skilled in the art to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0035] According to the embodiment of the present application, an inner wall cleaning structure is provided, please refer to Figures 1 to 5The container 100 has a containing cavity 101 and a container port 110 communicating with the containing cavity 101; the container port 110 includes oppositely arranged first and second container ports 102 and 103; the first container port 102 is opposite to the second container port 103; a cleaning assembly 200 is connected with the container 100, and the cleaning assembly 200 includes: a laser light source 83 for emitting a light beam; a galvanometer component 6 for receiving the light beam emitted by the laser light source 83 and forming a cleaning light beam for cleaning the inner wall surface of the containing cavity 101; a focusing module 7 located between the laser light source 83 and the galvanometer component 6 to adjust the focal length of the light beam entering the galvanometer component 6; a wedge lens assembly 300 corresponding to the container port 110 is arranged to make the cleaning light beam enter the containing cavity 101 after refraction by the wedge lens assembly 300 and irradiate on the inner wall surface of the containing cavity 101; and a driving motor, the wedge lens assembly 300 is connected with the output shaft of the driving motor to drive the wedge lens assembly 300 to rotate and thereby adjust the irradiation direction of the resulting cleaning light beam passing through the wedge lens assembly 300.

[0036] The inner wall cleaning structure of the embodiment is arranged to clean the inner wall of the containing cavity 101 of the container 100 by the cleaning assembly 200. The laser light source 83 emits a light beam, which first passes through the focusing module 7 to adjust the focal length of the light beam entering the galvanometer component 6, and then enters the galvanometer component 6 to form a cleaning light beam for cleaning the inner wall surface of the containing cavity 101. The cleaning light beam enters the containing cavity 101 after refraction by the wedge lens assembly 300 and irradiates on the inner wall surface of the containing cavity 101. The wedge lens assembly 300 is connected with the output shaft of the driving motor to drive the wedge lens assembly 300 to rotate and thereby adjust the irradiation direction of the resulting cleaning light beam passing through the wedge lens assembly 300, so that the cleaning light beam can realize laser cleaning work on each region through different irradiation directions, which is simple to operate and saves time and effort. The inner wall cleaning structure of the present application solves the technical problem that it is difficult to clean the inner wall of the container in the related art.

[0037] Specifically, the laser light source 83 is used to output pulsed laser, and the cleaning assembly 200 is also provided with an output head 81 for collimating pulsed light. The laser light source 83 is connected with the output head through an optical fiber cable 82, so that the angle of the output head 81 receiving the laser light source 83 is more flexible. The laser light source 83 is a pulsed fiber laser, which outputs pulsed laser with a wavelength of L1; and the output head 81 is a collimating output head for collimating the output pulsed laser.

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

[0039] Specifically, the focusing module 7 is a dynamic focusing lens composed of multiple lenses, and the front and back surfaces of the lenses are coated with L1 waveband anti-reflection film, so that the collimated light beam can be dynamically focused.

[0040] Specifically, the galvanometer component 6 is composed of one or two high-speed galvanometers, which can realize fast scanning of the input cleaning light beam and realize a line spot or a narrow-band rectangular spot.

[0041] Referring to Figure 2 and Figure 3 In the inner wall cleaning structure of the embodiment, the wedge mirror assembly 300 includes: a first wedge mirror 11 including a first incident surface 111 and a first exit surface 112; a 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 in parallel with 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 with the first wedge mirror 11, and the output shaft of the second drive motor 20 is connected with the second wedge mirror 21. One surface of each wedge mirror of the wedge mirror assembly 300 is a plane, and the other surface is an inclined surface 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 exit light beam is not deflected in the direction.

[0042] Specifically, the two surfaces of the first wedge mirror 11 and the second wedge mirror 21 are coated with visible light waveband anti-reflection film, which changes an angle for output for the normally incident light beam. If the wedge mirror is rotated for one circle, the exit light beam will follow the rotation for one circle. The first wedge mirror 11 and the second wedge mirror 21 are placed in sequence to form a double-wedge mirror group. The parallel light beam is normally incident to the mirror group, and by controlling the rotation of the two wedge mirrors, any track scanning in a disc area can be realized. By controlling the phase difference, the exit light beam can be scanned into a spiral disc. By repeatedly operating the first wedge mirror 11 and the second wedge mirror 21 to rotate through the first drive motor 10 and the second drive motor 20, the inner wall structure of the container 100 can be scanned and cleaned in the disc area.

[0043] 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 installed on the hollow rotating shafts in the two drive motors, and the first motor driver 12 and the second motor driver 22 are connected with the first drive motor 10 and the second drive motor 20 and control them.

[0044] Specifically, the first drive motor 10 and the second drive motor 20 are hollow high-precision ring motors, and the hollow parts are used for installing the wedge mirrors to drive the wedge mirrors to rotate, and the motors have a position sensor.

[0045] The first motor driver 12 and the second motor driver 22 control the motor, realize the control of the rotating speed and the rotating direction of the motor through the electric control signal, and can obtain the position of the rotating shaft of the motor through the position sensor on the motor.

[0046] Referring to Figure 2 In the inner wall cleaning structure, the inner wall cleaning structure further comprises an adapter cylinder 2, the adapter cylinder 2 is connected with the first container port 102 and the second container port 103, and the adapter cylinder 2 is provided with a window sheet 1, the window sheet 1 is a cylindrical structure, and the axis of the window sheet 1 coincides with the rotating axis of the second wedge mirror 21. The outer part of the adapter cylinder 2 is a conical external thread, which is matched with the conical thread of the inlet of the container 100 and is installed to the first container port 102 and the second container port 103 of the container 100. The inner part of the adapter cylinder 2 is a hollow structure, the window sheet 1 is installed in the middle, and the two surfaces of the window sheet 1 are coated with a visible light band anti-reflection film. The axis of the window sheet 1 coincides with the rotating axis of the second wedge mirror 21, so that the outgoing illumination light beam is not deflected.

[0047] In some inner wall cleaning structures, during operation, laser cleaning is first performed from one container port, and then laser cleaning is performed from the other corresponding container port. The cleaning areas of the two times are combined to obtain the entire cleaning area of the containing cavity 101.

[0048] Referring to Figure 2 In the inner wall cleaning structure, the inner wall cleaning structure further comprises a range finder 52, the range finder 52 is used for emitting a ranging light beam into the containing cavity 101, the ranging light beam is emitted out of the container port 110 after passing through the inner wall surface, and the range finder 52 obtains distance information according to the ranging light beam emitted out of the container port 110, so that the focusing module 7 adjusts the focal length of the light beam entering the galvanometer component 6 according to the distance information. The focusing module 7 adjusts the focal length of the light beam entering the galvanometer component 6 according to the distance information obtained by the range finder 52.

[0049] Specifically, the range finder 52 is a laser ranging module, and the phase method is used for laser ranging. The range finder 52 emits a monochromatic laser beam, the wavelength of the laser beam is L2, the laser light source is irradiated to the surface of an object, and the reflected laser light is reflected back to the range finder 52, so that the distance is measured.

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

[0051] Referring to Figure 2In the inner wall cleaning structure of the embodiment, the inner wall cleaning structure further comprises a control module 91, the control module 91 is in signal connection with the distance meter 52, the control module 91 calculates according to the distance information to obtain the focal length information, and transmits the focal length information to the focusing module 7, so that the focusing module 7 adjusts the focal length according to the focal length information. The distance meter 52 measures the distance to obtain the distance signal, which is sent to the control module 91, and then calculated as a signal for the focusing module 7. The laser is focused, and the focused light beam is scanned by the galvanometer component 6 at a high speed to form a linear light spot, two wedge mirrors and the window sheet 1, and then is incident on the inner surface of the container 100. Through the control of the distance signal and the focusing, the laser focus point is located at the irradiation point position of the cleaning light beam and the inner surface of the container 100. The cleaning light beam removes the uranium hexafluoride residue on the inner wall surface of the container 100.

[0052] Referring to Figure 2 In the inner wall cleaning structure of the embodiment, the inner wall cleaning structure further comprises a detection assembly 400 connected with the container 100, the detection assembly 400 comprises: an illumination assembly 90 for emitting an illumination light beam into the containing cavity 101; an imaging assembly 43 for receiving the illumination light beam reflected by the inner wall surface of the containing cavity 101 and forming an image of the inner wall surface according to the illumination light beam; and a focusing lens 42 in signal connection with the control module to adjust the focal length of the illumination light beam.

[0053] Specifically, the focusing lens 42 is a liquid lens, which dynamically adjusts the focal length of the lens by controlling the current and voltage, and can achieve very fast dynamic adjustment of the focal length. In cooperation with the imaging assembly 43, fast imaging at different distances can be achieved. The imaging assembly 43 is an industrial camera CCD, which can be a black and white camera or a color camera.

[0054] Specifically, the illumination assembly 90 irradiates a white light source or a monochromatic light source to output an illumination light beam. The illumination light beam is a large-aperture light beam with a certain divergence angle, which provides illumination for the internal region of the container 100, so that the camera can image and observe the illuminated region.

[0055] Specifically, the control module 91 centrally controls the laser light source 83, the focusing module 7, the galvanometer component 6, the first motor driver 12, the second motor driver 22, the illumination assembly 90, the distance meter 52 and the focusing lens 42, and is connected with them through corresponding cables.

[0056] Referring to Figure 4In the inner wall cleaning structure, the inner wall cleaning structure comprises a cleaning dichroic mirror 31, the cleaning dichroic mirror 31 comprises: a cleaning dichroic mirror incident surface 311, used for making the illumination light beam and the ranging light beam penetrate the cleaning dichroic mirror 31 through the cleaning dichroic mirror incident surface 311; and a cleaning dichroic mirror exit surface 312, oppositely arranged with the cleaning dichroic mirror incident surface 311, the cleaning dichroic mirror exit surface 312 is used for making the cleaning light beam refract through the cleaning dichroic mirror exit surface 312 and then reach the wedge mirror assembly 300.

[0057] The illumination light beam and the ranging light beam penetrate the cleaning dichroic mirror 31 through the cleaning dichroic mirror incident surface 311, and the cleaning light beam refracts through the cleaning dichroic mirror exit surface 312 and then reaches the wedge mirror assembly 300.

[0058] Specifically, the cleaning dichroic mirror 31 is placed at an angle of 45°, and is high-reflective to the pulsed laser (L1) and high-transmissive to the illumination light beam and the ranging laser (L2). The two surfaces are coated with optical medium films, the cleaning dichroic mirror incident surface 311 is coated with a visible light band anti-reflection film, and the cleaning dichroic mirror exit surface 312 is coated with an L1 band high-reflection and visible light other band high-transmission film.

[0059] Referring to Figure 4 In the inner wall cleaning structure, the inner wall cleaning structure comprises a first dichroic mirror 32, the first dichroic mirror 32 is located on a side of the cleaning dichroic mirror 31 away from the wedge mirror assembly 300; the first dichroic mirror 32 comprises: a first dichroic mirror incident surface 321, used for making the illumination light beam penetrate the first dichroic mirror 32 through the first dichroic mirror incident surface 321; and a first dichroic mirror exit surface 322, used for making the illumination light beam penetrate the first dichroic mirror 32 through the first dichroic mirror exit surface 322, and the first dichroic mirror exit surface 322 is used for making the ranging light beam reflect through the first dichroic mirror exit surface 322 and then reach the cleaning dichroic mirror 31. The illumination light beam penetrates the first dichroic mirror 32 through the first dichroic mirror incident surface 321, and the ranging light beam reflects through the first dichroic mirror exit surface 322 and then reaches the cleaning dichroic mirror 31.

[0060] Specifically, the first dichroic mirror 32 is placed at an angle of 45°, and is semi-reflective and semi-transmissive to the illumination light beam and high-reflective to the ranging laser (L1). The two surfaces are coated with optical medium films, the first dichroic mirror exit surface 322 is coated with a visible light band semi-reflective and semi-transmissive film and an L2 band high-reflection film, and the first dichroic mirror incident surface 321 is coated with a visible light band high-transmission film.

[0061] Referring to Figure 4In the inner wall cleaning structure, the inner wall cleaning structure comprises a second dichroic mirror 33, the second dichroic mirror 33 comprises: a second dichroic mirror incident surface 331, configured to allow the illumination light beam to penetrate the second dichroic mirror 33 through the second dichroic mirror incident surface 331; and a second dichroic mirror exit surface 332, configured to allow the ranging light beam to reach the first dichroic mirror exit surface 322 after refraction through the second dichroic mirror exit surface 332. The illumination light beam penetrates the second dichroic mirror 33 through the second dichroic mirror incident surface 331, and the ranging light beam reaches the first dichroic mirror exit surface 322 after refraction through the second dichroic mirror exit surface 332.

[0062] Specifically, the second dichroic mirror 33 is placed at an angle of 45°, which is highly transmissive to the illumination light and highly reflective to the ranging laser (L2). The second dichroic mirror 33 is realized by coating optical medium films on two surfaces, the second dichroic mirror incident surface 331 is coated with an anti-reflection film in the visible light band, and the second dichroic mirror exit surface 332 is coated with a high-reflection film in the L2 band and a high-transmission film in other visible light bands.

[0063] Referring to Figure 2 and Figure 4 In the inner wall cleaning structure, the inner wall cleaning structure comprises: a first filter 41 located between the first dichroic mirror 32 and the focusing lens 42 to filter the illumination light beam; and a second filter 51 located between the second dichroic mirror 33 and the range finder 52 to filter the ranging light beam. The first filter 41 is a narrow-band filter with low transmittance in the L2 band and high transmittance in other bands, so that the laser beam L2 of the range finder 52 cannot be transmitted, and the light beam of the illumination light source can be transmitted with high efficiency, thereby preventing the illumination light beam from interfering with the imaging of the imaging assembly 43 and ensuring clear imaging of the imaging assembly 43 on the illumination area. The second filter 51 is a band-pass narrow-band filter with high transmittance in the L2 band and low transmittance in other bands, so that the laser beam L2 of the range finder 52 can be transmitted with high efficiency, and the light beam of the illumination light source cannot pass through, thereby ensuring the ranging accuracy and precision of the range finder 52.

[0064] Referring to Figure 1In the inner wall cleaning structure of the embodiment, the first container port 102 is provided in multiple, and the multiple first container ports 102 are arranged at intervals; the second container port 103 is provided in multiple, and the multiple second container ports 103 are arranged at intervals. Conventionally, the first container port 102 is provided as a channel for the cleaning light beam to enter the containing cavity 101, and the second container port 103 is provided as a waste gas exhaust port for exhausting the gaseous particles and dust generated by the laser cleaning out of the container 100. The first container port 102 can be provided in multiple according to actual conditions, and multiple cleaning assemblies 200 are used to clean the inner wall of the container 100 respectively; the second container port 103 can also be provided in multiple, and the gaseous particles and dust generated inside are exhausted respectively.

[0065] Referring to Figure 5 In the cleaning method of the embodiment, the inner wall cleaning structure is included, and 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 port 102 of the container 100 and a second inner wall surface 105 corresponding to the second container port 103 of the container 100; installing the cleaning assembly 200 at the first container port 102, and rotating the wedge mirror assembly 300 by the driving motor to make the cleaning assembly 200 emit the cleaning light beam to scan the first inner wall surface 104; installing the cleaning assembly 200 at the second container port 103, and rotating the wedge mirror assembly 300 by the driving motor to make the cleaning assembly 200 emit the cleaning light beam to scan the second inner wall surface 105. When the cleaning assembly 200 is installed at the first container port 102, the driving motor rotates the wedge mirror assembly 300 to make the cleaning assembly 200 emit the cleaning light beam to scan the first inner wall surface 104, and when the cleaning assembly 200 is installed at the second container port 103, the wedge mirror assembly 300 rotates to make the cleaning assembly 200 emit the cleaning light beam to scan the second inner wall surface 105, thereby completing the scanning and cleaning work of the two inner wall surfaces of the container 100.

[0066] Specifically, the first inner wall surface 104 of the embodiment is the area contained by the path C-B-D in the figure. The second inner wall surface 105 is the area contained by the path C-A-D in the figure.

[0067] The cleaning method of the embodiment includes the following processes and steps:

[0068] 1. Inner wall cleaning structure and installation of hexafluoride uranium container

[0069] The uranium hexafluoride container is placed horizontally and fixed, the right-angle valve and the auxiliary assembly of the plug inlet are removed, and the adapter sleeve 2 is installed in each of the two inlets, and the window sheet 1 is installed in the middle of the adapter sleeve 2. The wedge mirror assembly 300 of the cleaning structure is aligned with one of the inlets as the first container port 102, and the wedge mirror assembly 300 is adjusted and ensured to be coaxial with the window sheet 1, and the first wedge mirror 11 and the second wedge mirror 21 of the wedge mirror assembly 300 are adjusted to the initial position.

[0070] 2. Laser ranging method and steps

[0071] The control module 91 sends a command to turn on the range finder 52 to emit a ranging laser beam, which is transmitted through the second filter 51, then sequentially reflected by the second dichroic mirror 33 and the first dichroic mirror 32, and then reflected by the cleaning dichroic mirror 31, the wedge mirror assembly 300 and the window sheet 1, and then incident on a certain point in front of the container, and then reflected on the surface of the container, and then sequentially reflected by the window sheet 1, the wedge mirror assembly 300, the cleaning dichroic mirror 31, and then the first dichroic mirror 32 and the second dichroic mirror 33, and then returned to the range finder 52, and then the distance information is obtained through data processing, and then transmitted to the control module 91.

[0072] 3. Laser cleaning method and steps

[0073] The range finder 52 performs ranging to obtain a distance signal, which is sent to the control module 91, and then calculated as a signal of the focusing module 7 to focus the laser beam, and then the focused laser beam is scanned into a line spot by the galvanometer component 6 at a high speed, and then reflected by the cleaning dichroic mirror 31, and then passed through the wedge mirror assembly 300 and the window sheet 1, and then incident on the inner surface of the container 100, and then the laser focus point is located at the irradiation point of the laser beam on the inner surface of the container through the control of the ranging signal and the focusing, and then the uranium hexafluoride residue on the inner wall of the container is removed by the pulsed laser beam, and then the gaseous particles and dust generated in the laser cleaning process are discharged to the outside of the container 100 through the second container port 103 as a waste gas exhaust port.

[0074] 4. Beam illumination method and steps

[0075] The control module 91 sends a command to turn on the illumination assembly 90 to output an illumination beam, which is transmitted through the second dichroic mirror 33, and then partially reflected by the first dichroic mirror 32, and then passed through the wedge mirror assembly 300 and the window sheet 1, and then incident on the area in front of the container to achieve illumination of the area.

[0076] 5. Optical imaging method and steps

[0077] The imaging assembly 43 and the focusing lens 42 are opened by sending instructions through the control module 91. According to the obtained ranging information, the focusing length signal is calculated and sent to the focusing lens 42, so that the adjustment of the focusing length of the lens is quickly realized. The reflected light beam of the illumination light beam of the illumination area passes through the window sheet 1, the wedge mirror assembly 300, the cleaning dichroic mirror 31, the first dichroic mirror 32, the first filter 41 in turn, and then passes through the focusing lens 42 to form an image on the photosensitive surface of the imaging assembly 43, so that the imaging of the imaging assembly 43 is realized. The collected imaging data is transmitted to the control module 91.

[0078] 6. Wedge mirror assembly rotation scanning method and steps

[0079] The first drive motor 10, the second drive motor 20, the first motor driver 12 and the second motor driver 22 are opened by sending instructions through the control module 91, the drive motor is rotated, the wedge mirror follows the rotation, and the two wedge mirrors are controlled to rotate with a certain phase difference. The pulsed laser beam, the ranging laser beam and the illumination light beam follow the rotation scanning through the wedge mirror, forming a disc area.

[0080] 7. Full-coverage cleaning scanning mode

[0081] First, the inner wall cleaning structure is installed at position A, and the waste gas is extracted from the D end, so as to realize the scanning, cleaning, illumination and imaging of the C-B-D area inside the uranium hexafluoride container; then the inner wall cleaning structure is installed at position B, and the waste gas is extracted from the A end, so as to realize the scanning, cleaning, illumination and imaging of the C-A-D area inside the uranium hexafluoride container. Finally, the full-surface full-coverage laser cleaning of the container is realized.

[0082] 8. Imaging data processing and detection

[0083] The pictures taken in the two scanning processes are spliced, the surface rendering is performed based on the three-dimensional structure model of the container, the three-dimensional graphic data is obtained, and the detection conclusion is provided.

[0084] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0085] Alternatively, the specific examples in the present embodiment can refer to the examples described in the above embodiments, which will not be described herein again.

[0086] The serial numbers of the above embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0087] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0088] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. An inner wall cleaning structure characterized by, The utility model relates to a container cleaning device, including: A container (100) has a containing cavity (101) and the container mouth (110) that communicates with the containing cavity (101);The container mouth (110) includes oppositely arranged first container mouth (102) and second container mouth (103);The first container mouth (102) is opposite with second container mouth (103) arrangement; A cleaning assembly (200) is connected with the container (100), and the cleaning assembly (200) includes: A laser light source (83) is used to emit a light beam; A galvanometer component (6) is used to receive the light beam emitted by the laser light source (83) and form a cleaning light beam for cleaning the inner wall surface of the containing cavity (101); A focusing module (7) is located between the laser light source (83) and the galvanometer component (6) to adjust the focal length of the light beam entering the galvanometer component (6); A wedge mirror assembly (300) is arranged corresponding to the container mouth (110) to make the cleaning light beam enter the containing cavity (101) after refraction through the wedge mirror assembly (300) and irradiate on the inner wall surface of the containing cavity (101); A drive motor, the wedge mirror assembly (300) is connected with the output shaft of the drive motor to drive the wedge mirror assembly (300) to rotate and adjust 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) includes a first incident surface (111) and a first exit surface (112); A second wedge mirror (21) 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 in parallel with 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 with the first wedge mirror (11), and the output shaft of the second drive motor (20) is connected with the second wedge mirror (21); A range finder (52) is used to emit a ranging light beam into the containing cavity (101), and the ranging light beam is emitted out of the container mouth (110) after passing through the inner wall surface, and the range finder (52) obtains distance information according to the ranging light beam emitted out of the container mouth (110) to make the focusing module (7) adjust the focal length of the light beam entering the galvanometer component (6) according to the distance information; A control module (91) is signal connected with the range finder (52), the control module (91) calculates according to the distance information to obtain focal length information, and transmits the focal length information to the focusing module (7) to make the focusing module (7) adjust the focal length according to the focal length information.

2. The inner wall cleaning structure according to claim 1, characterized by, The inner wall cleaning structure further comprises an adapter cylinder (2); the adapter cylinder (2) is connected with the first container port (102) and / or the second container port (103); a window sheet (1) is arranged on the adapter cylinder (2), the window sheet (1) is a cylindrical structure, and the axis of the window sheet (1) coincides with the rotation axis of the second wedge mirror (21).

3. The inner wall cleaning structure according to claim 2, characterized by The inner wall cleaning structure further comprises a detection assembly (400) connected with the container (100), and the detection assembly (400) comprises: an illumination assembly (90) for emitting an illumination light beam into the containing cavity (101); an imaging assembly (43) for receiving the illumination light beam reflected by the inner wall surface of the containing cavity (101) and forming an image of the inner wall surface according to the illumination light beam; a focusing lens (42) connected with the control module to adjust the focal length of the illumination light beam.

4. The inner wall cleaning structure according to claim 3, characterized by The inner wall cleaning structure comprises a cleaning dichroic mirror (31), and the cleaning dichroic mirror (31) comprises: a cleaning dichroic mirror incident surface (311) for allowing the illumination light beam and the ranging light beam to penetrate the cleaning dichroic mirror (31) through the cleaning dichroic mirror incident surface (311); a cleaning dichroic mirror exit surface (312) arranged opposite to the cleaning dichroic mirror incident surface (311), and the cleaning dichroic mirror exit surface (312) allows the cleaning light beam to reach the wedge mirror assembly (300) after refraction through the cleaning dichroic mirror exit surface (312).

5. The inner wall cleaning structure according to claim 4, characterized by The inner wall cleaning structure comprises a first dichroic mirror (32) located on the side of the cleaning dichroic mirror (31) away from the wedge mirror assembly (300). The first dichroic mirror (32) comprises: a first dichroic mirror incident surface (321) for allowing the illumination light beam to penetrate the first dichroic mirror (32) through the first dichroic mirror incident surface (321); a first dichroic mirror exit surface (322) for allowing the illumination light beam to penetrate the first dichroic mirror (32) through the first dichroic mirror exit surface (322), and the first dichroic mirror exit surface (322) is used for allowing the ranging light beam to reach the cleaning dichroic mirror (31) after reflection through the first dichroic mirror exit surface (322).

6. The inner wall cleaning structure according to claim 5, characterized by The inner wall cleaning structure comprises a second dichroic mirror (33), and the second dichroic mirror (33) comprises: a second dichroic mirror incident surface (331) for allowing the illumination light beam to penetrate the second dichroic mirror (33) through the second dichroic mirror incident surface (331); a second dichroic mirror exit surface (332) for allowing the ranging light beam to reach the first dichroic mirror exit surface (322) after refraction through the second dichroic mirror exit surface (332).

7. The inner wall cleaning structure according to claim 6, characterized by The inner wall cleaning structure comprises: a first filter (41) arranged between the first dichroic mirror (32) and the focusing lens (42) to filter the illumination light beam; A second filter (51) is located between the second dichroic mirror (33) and the rangefinder (52) to filter the ranging light beam.

8. The inner wall cleaning structure according to claim 1, wherein, The first container port (102) is a plurality of, a plurality of first container port (102) is set apart; The second container port (103) is a plurality of, a plurality of second container port (103) is set apart.

9. A cleaning method suitable for the inner wall cleaning structure according to any one of claims 1 to 8, characterized by, The cleaning method comprises: Divide the inner wall surface of the container (100) into a first inner wall surface (104) corresponding to the first container port (102) of the container (100) and a second inner wall surface (105) corresponding to the second container port (103) of the container (100); Install the cleaning assembly (200) at the first container port (102), and drive the wedge mirror assembly (300) to rotate by using the driving motor, so that the cleaning light beam emitted by the cleaning assembly (200) scans the first inner wall surface (104); Install the cleaning assembly (200) at the second container port (103), and drive the wedge mirror assembly (300) to rotate by using the driving motor, so that the cleaning light beam emitted by the cleaning assembly (200) scans the second inner wall surface (105).

Images