Metal surface radioactive contamination removing device

Abstract

The utility model relates to a metal surface radioactive contamination removing device, which belongs to the technical field of radioactive contamination removing devices and comprises a case, a decontamination mechanism and a controller, the inside of the case is divided into a water purification area, a decontamination area and an installation area, and the decontamination area and the installation area are adjacently arranged along the height direction of the case and are both positioned on one side of the water purification area; the decontamination mechanism comprises a water pump and an ultrasonic generator, and the water pump is located in the mounting area and communicates with the water purification area and the decontamination area; the ultrasonic generators are located in the decontamination area and fixed to the corresponding partition plates. The controller is electrically connected with the water pump and the ultrasonic generator. A traditional metal surface pollutant removing mode is changed, the decontamination area is filled with clean water containing cleaning agents, then the ultrasonic generator is started to emit ultrasonic waves, the acoustic cavitation phenomenon of the ultrasonic waves in liquid can be utilized, radioactive contamination on the metal surface can be rapidly removed, and the removing efficiency and the removing effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive contamination removal devices, in particular to a radioactive contamination removal device for metal surfaces. Background Art

[0002] With the continuous improvement of nuclear energy application technology, the development and utilization of nuclear energy has become more and more extensive, bringing huge economic and social benefits to mankind. At the same time, in the processing and application of nuclear materials such as mining, transportation, processing, storage and nuclear waste disposal, the surface of metal tools or components that are in direct contact with nuclear materials often has a certain amount of radioactive contamination, which needs to be decontaminated before storage. However, due to the complex structural shapes of some metal tools or components, some even have internal spaces such as screw holes, it is difficult to completely decontaminate them using traditional decontamination methods.

[0003] At present, the main methods for removing radioactive contamination from metal surfaces include vacuum dust removal, high-pressure water washing, and peelable membrane decontamination. Among them, vacuum dust removal is difficult to achieve sufficient negative pressure in engineering applications, and the removal rate is low and the effect is limited. Although high-pressure water washing can wash away radioactive contamination on the surface of the medium, it will produce a large amount of radioactive waste liquid, which increases the difficulty of subsequent disposal, and there is a problem of insufficient washing for the fine structures inside metal tooling or components. During the implementation of peelable membrane decontamination, the drying time of the membrane is greatly affected by environmental factors such as ambient temperature and humidity, and it is difficult to implement in a controllable manner. The stripping operation may require a lot of manpower and time, which increases the difficulty and risk of actual decontamination operations.

[0004] Therefore, how to design a device for removing radioactive contamination from metal surfaces that has high removal efficiency, good removal effect, is not affected by environmental factors, is easy and quick to use, and does not produce a large amount of radioactive waste liquid is an urgent problem that technical personnel in this field need to solve. Utility Model Content

[0005] The utility model provides a device for removing radioactive contamination from metal surfaces, which solves the technical problems of low removal efficiency, poor removal effect, susceptibility to environmental factors and generation of a large amount of radioactive waste liquid in existing metal surface contamination removal methods.

[0006] The utility model solves the above technical problems with the following technical solutions: a device for removing radioactive contamination from a metal surface, comprising: a chassis, a decontamination mechanism and a controller.

[0007] A plurality of partitions are fixed inside the chassis, and the plurality of partitions divide the interior of the chassis into a water purification area, a decontamination area and an installation area. The decontamination area and the installation area are arranged adjacent to each other along the height direction of the chassis and are both located on one side of the water purification area. A clean water inlet hole and a filling hole for adding detergent are provided on the outer wall of the chassis corresponding to the water purification area, and a metal access hole is provided on the top surface of the chassis corresponding to the decontamination area; the decontamination mechanism includes a water pump and an ultrasonic generator, the water pump is located in the installation area, and its water inlet passes through the corresponding partition to communicate with the water purification area, and its water outlet passes through the corresponding partition to communicate with the decontamination area; the ultrasonic generator is located in the decontamination area and fixed on the corresponding partition; the controller is electrically connected to the water pump and the ultrasonic generator respectively.

[0008] The beneficial effects of the utility model are as follows: the traditional way of removing pollutants from metal surfaces is changed, clean water containing detergent is first filled into the decontamination area, and then the ultrasonic generator is started to emit ultrasonic waves, and the acoustic cavitation phenomenon of ultrasonic waves in liquid can be utilized (the acoustic cavitation phenomenon is divided into steady-state cavitation and transient cavitation, wherein steady-state cavitation and the micro-acoustic flow generated by it can provide a dissolution mechanism at the metal surface to dissolve the contaminants, and the steady-state cavitation bubbles formed between the contamination layer and the metal surface will cause the contamination layer to fall off; transient cavitation will generate shock waves, which can break the contamination layer and peel it off), and the radioactive contamination on the metal surface can be quickly removed, thereby reducing the amount of clean water used and improving the removal efficiency and removal effect.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, it also includes a filtering mechanism, and the interior of the chassis also includes a filtering area and a waste liquid area, the filtering area is located below the installation area and the water purification area; the waste liquid area is located below the filtering area; a first liquid hole is provided on the partition corresponding to the decontamination area and the installation area; a second liquid hole opposite to the first liquid hole is provided on the partition corresponding to the installation area and the filtering area, and the first liquid hole and the second liquid hole are connected by a connecting pipe; the filtering mechanism includes a filter element and a casing for shielding radioactivity, the casing is located in the filtering area and fixed on the corresponding partition, and a waste liquid inlet hole and a clean water outlet hole are provided on the casing; the filter element is located in the casing; the second liquid hole is connected to the waste liquid inlet hole through a clean water inlet pipe; the waste liquid area is connected to the clean water outlet hole through a clean water outlet pipe; a drainage hole is provided on the outer box wall of the chassis corresponding to the waste liquid area.

[0011] Furthermore, the filter element is activated carbon.

[0012] A further beneficial effect of the above method is that the radioactive waste liquid discharged from the decontamination area is filtered using activated carbon to avoid direct discharge of the radioactive waste liquid and protect the environment.

[0013] Furthermore, the decontamination mechanism also includes a mounting frame, a first water supply pipe, a second water supply pipe, a spray head and a storage rack located in the decontamination area, the mounting frame is fixed on the corresponding partition; the second water supply pipe is arranged vertically to the first water supply pipe and the first water supply pipe is rotatably connected to the mounting frame with the height direction of the chassis as the axis, and the water inlet at the bottom end of the first water supply pipe is connected to the water outlet of the water pump; the water inlet at one end of the second water supply pipe is fixed and connected to the water outlet at the top end of the first water supply pipe, and the other end can extend to the middle of the upper end of the decontamination area; the spray head is fixed and connected to the other end of the second water supply pipe; the storage rack is located below the spray head and fixed on the corresponding partition.

[0014] The further beneficial effects of adopting the above are:

[0015] 1. The first water supply pipe is rotated with the height direction of the chassis as the axis, which can drive the sprinkler head to rotate horizontally, so as to avoid the sprinkler head and the second water supply pipe occupying the metal access hole and affecting the metal access work;

[0016] 2. Use a spray head to spray clean water onto the radioactively contaminated metal on the rack. This can rinse the metal before ultrasonic cleaning to improve the metal decontamination effect.

[0017] Further, the controller includes a first flow control valve, a second flow control valve, a flow meter, a third flow control valve, a fourth flow control valve and a computer, the first flow control valve is installed at the clean water inlet hole; the second flow control valve is located in the installation area and installed at the water outlet of the water pump; the flow meter and the third flow control valve are both located in the filtration area and installed at intervals on the clean water inlet pipe; the fourth flow control valve is installed at the drain hole; the computer is fixed on the outer wall of the chassis and is electrically connected to the water pump, the ultrasonic generator, the first flow control valve, the second flow control valve, the flow meter, the third flow control valve and the fourth flow control valve respectively.

[0018] The further beneficial effects of adopting the above are:

[0019] 1. The first flow control valve can be used to open or close the water supply in the water purification area at any time;

[0020] 2. The second flow control valve can be used to control the water flow rate in the decontamination area;

[0021] 3. Using the flow meter and the third flow control valve, the flow rate on the waste liquid inlet pipe can be monitored in real time to assist in determining whether the filter element needs to be replaced;

[0022] 4. The fourth flow control valve can be used to control the drainage flow in the waste liquid area.

[0023] Furthermore, the controller also includes a fixed liquid level sensor and a floating liquid level sensor, the fixed liquid level sensor is located in the clean water area and fixed on the corresponding partition; the floating liquid level sensor is located in the waste liquid area; the computer is electrically connected to the fixed liquid level sensor and the floating liquid level sensor respectively.

[0024] A further beneficial effect of the above is: using a fixed liquid level sensor to monitor the liquid level in the clean water area in real time, and using a floating liquid level sensor to monitor the liquid level in the waste liquid area in real time, which can provide the computer with data basis for opening or closing the first flow valve and the fourth flow valve.

[0025] Furthermore, the partitions between the decontamination area and the installation area are arranged to be tilted upward in sequence from a direction close to the first liquid passage hole to a direction away from the first liquid passage hole.

[0026] A further beneficial effect of the above method is that the partitions between the decontamination area and the installation area are arranged in an upward tilt from the direction close to the first liquid hole to the direction away from the first liquid hole, which can facilitate the discharge of waste liquid in the decontamination area and avoid sludge accumulation in the decontamination area.

[0027] Furthermore, it also includes a hot air blower, which is fixed on the outer wall of the chassis and has a hot air outlet connected to the decontamination area; the controller is electrically connected to the hot air blower.

[0028] A further beneficial effect of the above method is that the hot air blower is used to blow hot air into the decontamination area, so that the decontaminated metal can be dried, making it convenient to take it out later and use it directly.

[0029] Furthermore, it also includes a top cover, which is detachably buckled on the metal access hole.

[0030] Furthermore, it also includes a plurality of universal wheels, which are rotatably connected to the outer bottom surface of the chassis at intervals. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a front view structural schematic diagram of a device for removing radioactive contamination from a metal surface according to the utility model;

[0032] Figure 2 This is a schematic diagram of the internal structure of a device for removing radioactive contamination from a metal surface according to the utility model;

[0033] Figure 3 It is a schematic diagram of the top view of the structure of a device for removing radioactive contamination from a metal surface according to the utility model after the top cover is removed;

[0034] Figure 4 The utility model is a three-dimensional structural schematic diagram of a storage rack in a device for removing radioactive contamination from a metal surface.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Chassis, 11. Water purification area, 12. Decontamination area, 13. Installation area, 14. Filter area, 15. Waste liquid area, 16. Clean water inlet hole, 17. Filling hole, 18. Drain hole, 2. Decontamination mechanism, 21. Water pump, 22. Ultrasonic generator, 23. Mounting frame, 24. First water supply pipe, 25. Second water supply pipe, 26. Sprinkler head, 27. Storage rack, 3. Controller, 31. First flow control valve, 32. Second flow control valve, 33. Flow meter, 34. Third flow control valve, 35. Fourth flow control valve, 36. Computer, 37. Fixed liquid level sensor, 38. Floating liquid level sensor, 4. Partition, 5. Filter mechanism, 51. Filter element, 52. Chassis, 6. Connecting pipe, 7. Second switch door, 8. Hot air blower, 9. Top cover, 10. Universal wheel. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0038] like Figure 2 As shown, a device for removing radioactive contamination from a metal surface comprises: a chassis 1, a decontamination mechanism 2 and a controller 3.

[0039] A plurality of partitions 4 are fixed inside the chassis 1 and the plurality of partitions 4 divide the interior of the chassis 1 into a water purification area 11, a decontamination area 12 and an installation area 13. The decontamination area 12 and the installation area 13 are arranged adjacent to each other along the height direction of the chassis 1 and are both located on one side of the water purification area 11. A clean water inlet 16 and a filling hole 17 for adding detergent are provided on the outer wall of the chassis 1 corresponding to the water purification area 11, and a metal access hole is provided on the top surface of the chassis 1 corresponding to the decontamination area 12; the decontamination mechanism 2 includes a water pump 21 and an ultrasonic generator 22, the water pump 21 is located in the installation area 13 and its water inlet passes through the corresponding partition 4 to communicate with the water purification area 11, and its water outlet passes through the corresponding partition 4 to communicate with the decontamination area 12; the ultrasonic generator 22 is located in the decontamination area 12 and is fixed on the corresponding partition 4; the controller 3 is electrically connected to the water pump 21 and the ultrasonic generator 22 respectively.

[0040] In some specific embodiments, a filtering mechanism 5 may also be included, and the interior of the chassis 1 also includes a filtering area 14 and a waste liquid area 15, the filtering area 14 is located below the installation area 13 and the clean water area 11; the waste liquid area 15 is located below the filtering area 14; a first liquid hole is provided on the partition 4 corresponding to the decontamination area 12 and the installation area 13; a second liquid hole opposite to the first liquid hole is provided on the partition 4 corresponding to the installation area 13 and the filtering area 14, and the first liquid hole and the second liquid hole are connected through a connecting pipe 6; the filtering mechanism 5 includes a filter element 51 and a casing 52 for shielding radioactivity, the casing 52 is located in the filtering area 14 and fixed on the corresponding partition 4, and a waste liquid inlet hole and a clean water outlet hole are provided on the casing 52; the filter element 51 is located in the casing 52; the second liquid hole is connected to the waste liquid inlet hole through the clean water inlet pipe; the waste liquid area 15 is connected to the clean water outlet through the clean water outlet pipe; a drainage hole 18 is provided on the outer box wall of the chassis 1 corresponding to the waste liquid area 15.

[0041] In some specific embodiments, the decontamination mechanism 2 may further include a mounting frame 23, a first water supply pipe 24, a second water supply pipe 25, a spray head 26 and a storage rack 27 located in the decontamination area 12, the mounting frame 23 is fixed on the corresponding partition 4; the second water supply pipe 25 is arranged vertically to the first water supply pipe 24 and the first water supply pipe 24 is rotatably connected to the mounting frame 23 with the height direction of the chassis 1 as the axis, and the water inlet at the bottom end of the first water supply pipe 24 is connected to the water outlet of the water pump 21; the water inlet at one end of the second water supply pipe 25 is fixed and connected to the water outlet at the top end of the first water supply pipe 24, and the other end thereof can extend to the middle of the upper end of the decontamination area 12; the spray head 26 is fixed and connected to the other end of the second water supply pipe 25; the storage rack 27 is located below the spray head 26 and fixed on the corresponding partition 4.

[0042] In some specific embodiments, the controller 3 may include a first flow control valve 31, a second flow control valve 32, a flow meter 33, a third flow control valve 34, a fourth flow control valve 35 and a computer 36, the first flow control valve 31 is installed at the clean water inlet hole 16; the second flow control valve 32 is located in the installation area 13 and is installed at the water outlet of the water pump 21; the flow meter 33 and the third flow control valve 34 are both located in the filtration area 14 and are installed at intervals on the clean water inlet pipe; the fourth flow control valve 35 is installed at the drain hole 18; the computer 36 is fixed on the outer box wall of the chassis 1 and is electrically connected to the water pump 21, the ultrasonic generator 22, the first flow control valve 31, the second flow control valve 32, the flow meter 33, the third flow control valve 34 and the fourth flow control valve 35 respectively.

[0043] In some specific embodiments, the housing 52, the movement 51 and the third flow control valve 35 all correspond to two, which can automatically switch to another movement 51 for filtration after a single movement 51 is used up, so as to avoid shutdown of the filtering mechanism.

[0044] In some specific embodiments, the controller 3 may also include a fixed liquid level sensor 37 and a floating liquid level sensor 38. The fixed liquid level sensor 37 is located in the clean water area 11 and fixed on the corresponding partition 4; the floating liquid level sensor 38 is located in the waste liquid area 15; and the computer 36 is electrically connected to the fixed liquid level sensor 37 and the floating liquid level sensor 38, respectively.

[0045] In some specific embodiments, a first switch door and a second switch door 7 may also be included, and a filter element replacement hole is provided on the outer side of the casing 52; the first switch door is hinged on the filter element replacement hole; a filter element removal hole is provided on the outer box wall of the chassis 1 corresponding to the filter area 14; the second switch door 7 is hinged on the filter element removal hole.

[0046] In some specific embodiments, the partitions 4 corresponding to the decontamination area 12 and the installation area 13 are arranged to be tilted upwards in sequence from a direction close to the first liquid through hole to a direction away from the first liquid through hole.

[0047] In some specific embodiments, a hot air blower 8 may be further included. The hot air blower 8 is fixed on the outer wall of the chassis 1 and its hot air outlet is connected to the decontamination area 12 ; the controller 3 is electrically connected to the hot air blower 8 .

[0048] In some specific embodiments, a top cover 9 may also be included, and the top cover 9 may be detachably buckled on the metal access hole.

[0049] In some specific embodiments, a plurality of universal wheels 10 may be further included, and the plurality of universal wheels 10 are rotatably connected to the outer bottom surface of the chassis 1 at intervals.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for removing radioactive contamination from metal surfaces, characterized in that: include: A case (1), wherein a plurality of partitions (4) are fixed inside the case (1), and the plurality of partitions (4) divide the inside of the case (1) into a water purification area (11), a decontamination area (12), and an installation area (13); the decontamination area (12) and the installation area (13) are arranged adjacent to each other along the height direction of the case (1) and are both located on one side of the water purification area (11); a clean water inlet hole (16) and a filling hole (17) for adding a cleaning agent are provided on the outer wall of the case (1) corresponding to the water purification area (11); and a metal access hole is provided on the top surface of the case (1) corresponding to the decontamination area (12); A decontamination mechanism (2), the decontamination mechanism (2) comprising a water pump (21) and an ultrasonic generator (22), the water pump (21) being located in the installation area (13) and having a water inlet passing through the corresponding partition (4) to communicate with the water purification area (11), and having a water outlet passing through the corresponding partition (4) to communicate with the decontamination area (12); the ultrasonic generator (22) being located in the decontamination area (12) and fixed on the corresponding partition (4); A controller (3), wherein the controller (3) is electrically connected to the water pump (21) and the ultrasonic generator (22) respectively.

2. The device for removing radioactive contamination from metal surface according to claim 1, characterized in that: The machine box (1) further comprises a filtering mechanism (5), wherein the interior of the machine box (1) further comprises a filtering area (14) and a waste liquid area (15), wherein the filtering area (14) is located below the installation area (13) and the water purification area (11); and the waste liquid area (15) is located below the filtering area (14); a first liquid through hole is provided on the partition plate (4) corresponding to the decontamination area (12) and the installation area (13); and a second liquid through hole is provided on the partition plate (4) corresponding to the installation area (13) and the filtering area (14) opposite to the first liquid through hole, wherein the first liquid through hole and the second liquid through hole are The filter mechanism (5) comprises a filter element (51) and a casing (52) for shielding radioactivity, the casing (52) being located in the filter area (14) and fixed on the corresponding partition plate (4), the casing (52) being provided with a waste liquid inlet hole and a clean water outlet hole; the filter element (51) being located in the casing (52); the second liquid hole being connected to the waste liquid inlet hole through a clean water inlet pipe; the waste liquid area (15) being connected to the clean water outlet hole through a clean water outlet pipe; and a drainage hole (18) being provided on the outer wall of the casing (1) corresponding to the waste liquid area (15).

3. The device for removing radioactive contamination from metal surface according to claim 2, characterized in that: The decontamination mechanism (2) further comprises a mounting frame (23), a first water supply pipe (24), a second water supply pipe (25), a spray head (26) and a storage rack (27) located in the decontamination area (12); the mounting frame (23) is fixed on the corresponding partition (4); the second water supply pipe (25) is arranged vertically with the first water supply pipe (24) and the first water supply pipe (24) is rotatably connected to the mounting frame (23) with the height direction of the chassis (1) as an axis; The water inlet at the bottom end of the first water supply pipe (24) is connected to the water outlet of the water pump (21); the water inlet at one end of the second water supply pipe (25) is fixed and connected to the water outlet at the top end of the first water supply pipe (24), and the other end can extend to the middle of the upper end of the decontamination area (12); the spray head (26) is fixed and connected to the other end of the second water supply pipe (25); the storage rack (27) is located below the spray head (26) and is fixed on the corresponding partition (4).

4. The device for removing radioactive contamination from metal surface according to claim 3, characterized in that: The controller (3) comprises a first flow control valve (31), a second flow control valve (32), a flow meter (33), a third flow control valve (34), a fourth flow control valve (35) and a computer (36). The first flow control valve (31) is installed at the clean water inlet hole (16); the second flow control valve (32) is located in the installation area (13) and installed at the water outlet of the water pump (21); the flow meter (33) and the third flow control valve (34) are both located in the filtering area (14) and installed at intervals on the clean water inlet pipe; the fourth flow control valve (35) is installed at the drain hole (18); and the computer (36) is fixed on the outer wall of the case (1) and is electrically connected to the water pump (21), the ultrasonic generator (22), the first flow control valve (31), the second flow control valve (32), the flow meter (33), the third flow control valve (34) and the fourth flow control valve (35) respectively.

5. The device for removing radioactive contamination from metal surface according to claim 4, characterized in that: The controller (3) further comprises a fixed liquid level sensor (37) and a floating liquid level sensor (38), wherein the fixed liquid level sensor (37) is located in the clean water area (11) and fixed on the corresponding partition (4); the floating liquid level sensor (38) is located in the waste liquid area (15); and the computer (36) is electrically connected to the fixed liquid level sensor (37) and the floating liquid level sensor (38), respectively.

6. The device for removing radioactive contamination from metal surface according to claim 2, characterized in that: It also comprises a first switch door and a second switch door (7); the outer side surface of the casing (52) is provided with a filter element replacement hole; the first switch door is hinged on the filter element replacement hole; the outer side wall of the casing (1) corresponding to the filter area (14) is provided with a filter element removal hole; the second switch door (7) is hinged on the filter element removal hole.

7. The device for removing radioactive contamination from metal surface according to claim 2, characterized in that: The partition plates (4) corresponding to the decontamination area (12) and the installation area (13) are arranged in an upwardly inclined manner in a direction from close to the first liquid passage hole to far away from the first liquid passage hole.

8. The device for removing radioactive contamination from metal surface according to claim 1, characterized in that: It also includes a hot air blower (8), which is fixed on the outer wall of the chassis (1) and has a hot air outlet connected to the decontamination area (12); the controller (3) is electrically connected to the hot air blower (8).

9. The device for removing radioactive contamination from metal surface according to claim 1, characterized in that: It also comprises a top cover (9), and the top cover (9) is detachably buckled on the metal access hole.

10. The device for removing radioactive contamination from metal surface according to claim 1, characterized in that: It also comprises a plurality of universal wheels (10), wherein the plurality of universal wheels (10) are rotatably connected to the outer bottom surface of the chassis (1) at intervals.

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