A passageway decontamination device

Abstract

This application provides a channel decontamination device, which includes a cantilever, a drum assembly, and a cleaning mechanism. The drum assembly includes a drum rotatably mounted on the cantilever and a take-up / de-take-up line wound on the drum. The cleaning mechanism is connected to the take-up / de-take-up line and includes a cleaning component and a first support component. The cleaning component includes a cleaning disc, cleaning nozzles, and a brush layer. The first support component includes a telescopic device. The first support component is located on one side of the cleaning disc along a first direction, and the cleaning nozzles and brush layer are located on the side of the cleaning disc opposite to the first support component along the first direction. The telescopic device adjusts the length of the cleaning mechanism along the first direction by extending or retracting along it. The channel decontamination device of this application not only effectively reduces the generation of radioactive aerosols but also has a good decontamination effect.

Description

Technical Field

[0001] This application relates to the field of nuclear facility decontamination technology, and in particular to a channel decontamination device. Background Technology

[0002] In heavy water research reactors, transport channels are the necessary routes for transferring spent fuel rods unloaded from the reactor to spent fuel storage pools. The inner walls of the transport channels are lined with stainless steel. During decommissioning, the steel lining needs to be decontaminated according to the decontamination management target values. The decontamination method is generally to use decontamination equipment to spray water directly onto the inner walls of the transport channels.

[0003] However, the stainless steel cladding of the transport channel is covered with a thick layer of radioactive contaminants. If conventional decontamination methods are used, a large amount of radioactive aerosols will be generated during the decontamination process. These radioactive aerosols are easy to spread and pollute the environment. In addition, the transport channel is usually narrow and deep. Using conventional decontamination equipment will cause the nozzles to shake violently due to the back pressure of the high-pressure water, making it easy for them to deviate from the original decontamination path and making it difficult to achieve the desired decontamination effect. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a dedicated decontamination device that can effectively reduce the generation of radioactive aerosols and has a good decontamination effect.

[0005] To achieve the above objectives, one embodiment of this application provides a channel decontamination device, comprising:

[0006] cantilever;

[0007] A drum assembly, the drum assembly including a drum rotatably disposed on the cantilever and a take-up / unwinding line wound on the drum;

[0008] A cleaning mechanism connected to the take-up and drop-out pipeline, the cleaning mechanism including a cleaning component and a first support component, the cleaning component including a cleaning disc, a cleaning nozzle and a brush layer surrounding the cleaning nozzle, the first support component including a telescopic device, the first support component being disposed on one side of the cleaning disc along a first direction, the cleaning nozzle and the brush layer being disposed on the side of the cleaning disc opposite to the first support component along the first direction, the telescopic device adjusting the length of the cleaning mechanism along the first direction by extending and retracting along the first direction.

[0009] In one embodiment, the cleaning assembly includes a plurality of the cleaning nozzles, and the brush layer surrounds the periphery of all the cleaning nozzles.

[0010] In one embodiment, there are multiple cleaning nozzles, which are arranged in a cross pattern along two intersecting directions.

[0011] In one embodiment, the first support assembly includes a first caster assembly, the first caster assembly including a first caster, the first caster assembly being disposed on the side of the telescopic device opposite to the cleaning disc along the first direction; and / or, the channel cleaning device further includes a second caster assembly, the second caster assembly including a second caster, the second caster assembly being located on the side of the cleaning disc where the brush layer is disposed.

[0012] In one embodiment, the first support assembly includes a first caster assembly, and the first support assembly further includes a mounting bracket, the mounting bracket being disposed on the side of the telescopic device opposite to the cleaning tray along the first direction, and the first caster assembly being disposed on the mounting bracket.

[0013] In one embodiment, the first caster assembly includes a caster mounting bracket rotatably connected to the first caster, and the first support assembly further includes a first elastic element disposed between the caster mounting bracket and the mounting bracket, and extending and retracting along the first direction.

[0014] In one embodiment, the mounting bracket includes a first mounting plate and a sleeve disposed on the first mounting plate, and the first caster assembly includes a guide rod connected to the caster fixing bracket, the guide rod passing through the sleeve and sliding along the first direction.

[0015] In one embodiment, the first elastic element is sleeved on the guide rod and abuts against the caster fixing frame and the sleeve, respectively.

[0016] In one embodiment, the channel cleaning device includes a second caster assembly, and the cleaning assembly further includes a second mounting plate and a second elastic member. The second mounting plate is disposed on the side of the cleaning disc away from the brush layer along the first direction, and the second elastic member is disposed between the cleaning disc and the second mounting plate and extends and retracts along the first direction. The second caster assembly is disposed on the second mounting plate.

[0017] In one embodiment, the first support assembly further includes a support bracket, which is connected to the second mounting plate and the telescopic device on opposite sides along the first direction, respectively.

[0018] In one embodiment, the cleaning assembly includes a connecting joint communicating with the cleaning nozzle, the connecting joint being located on the side of the cleaning disc away from the cleaning assembly along the first direction; the support bracket includes a third mounting plate and a plurality of support rods, the plurality of support rods surrounding the periphery of the connecting joint and connected to the second mounting plate, the third mounting plate being disposed at one end of the plurality of support rods away from the second mounting plate along the first direction.

[0019] In one embodiment, the cleaning disc has a receiving groove on the side opposite to the first support assembly along the first direction, the brush layer surrounds the outer periphery of the receiving groove, and the cleaning nozzle is disposed in the receiving groove.

[0020] In one embodiment, the channel decontamination device further includes a wastewater recovery mechanism, which includes a wastewater suction device, a wastewater recovery tank, and a recovery pipe connected to the wastewater recovery tank. The cleaning tray has a suction port connected to the receiving tank, and the recovery pipe is connected to the suction port.

[0021] In one embodiment, the feed line is a water supply pipe, and the water supply pipe is connected to the cleaning nozzle.

[0022] In one embodiment, the cleaning assembly further includes a retaining ring fitted around the outer periphery of the brush layer.

[0023] In one embodiment, the reel assembly is movable in the extension direction of the cantilever.

[0024] In one embodiment, the first support assembly is detachably connected to the cleaning assembly, and the cleaning mechanism further includes a second support assembly, the second support assembly including a frame, and at least one of a travel caster and a protective caster, wherein the travel caster is disposed at the bottom of the frame, and the protective caster is disposed on the outer side of the frame laterally;

[0025] The channel cleaning device has a first installation configuration in which the cleaning component is detachably connected to the first support component and a second installation configuration in which the cleaning component is detachably connected to the second support component. When the channel cleaning device is in the second installation configuration, the cleaning disc is located above the cleaning nozzle and the brush layer.

[0026] This application provides a channel decontamination device, including a cantilever, a drum assembly, and a cleaning mechanism. The drum assembly includes a drum rotatably mounted on the cantilever and a take-up / de-up pipeline wound on the drum. The cleaning mechanism is connected to the take-up / de-up pipeline and includes a cleaning component and a first support component. The cleaning component includes a cleaning disc, a cleaning nozzle, and a brush layer surrounding the cleaning nozzle. During the cleaning of the sidewalls of the transport channel, the telescopic device of the first support component extends, causing the first support component and the brush layer of the cleaning mechanism to abut against the sidewalls on both sides of the transport channel. The cleaning nozzle sprays cleaning fluid onto the sidewalls of the transport channel. The brush layer surrounding the cleaning nozzle and abutting against the sidewall not only reduces the contact between the cleaning fluid containing radioactive materials and the outside air, thereby reducing the generation of radioactive aerosols, but also effectively controls the diffusion of radioactive aerosols. The cleaning nozzle can also remain stable during the cleaning process without shaking due to the high-pressure backlash of the cleaning fluid. The channel decontamination device of this application can not only effectively reduce the generation of radioactive aerosols, but also has a good decontamination effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a channel decontamination device according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the cleaning mechanism from a perspective when the channel decontamination device of this application is in the first installation state, and the fixing ring is omitted in the figure;

[0029] Figure 3 This is a schematic diagram of the cleaning mechanism from another perspective when the channel decontamination device of this application is in the first installation state. The fixing ring is omitted in the figure.

[0030] Figure 4 This is a schematic diagram of the cleaning mechanism when the channel decontamination device of this application is in the second installation configuration;

[0031] Figure 5 This is a schematic diagram of the cleaning assembly according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Cantilever; 2. Drum assembly; 21. Retractable / unretractable hose; 22. Drum; 3. Cleaning mechanism; 31. Cleaning assembly; 311. Cleaning tray; 311a. Receiving tank; 311b. Suction port; 312. Cleaning nozzle; 313. Brush layer; 314. Second mounting plate; 315. Second elastic element; 316. Connecting joint; 317. Fixing ring; 32. First support assembly; 321. Telescopic device; 322. First caster assembly; 3221. Guide. 3222, Caster fixing bracket; 3223, First caster; 323, Mounting bracket; 3231, First mounting plate; 3232, Sleeve; 324, First elastic element; 325, Support bracket; 3251, Third mounting plate; 3252, Support rod; 33, Second support assembly; 331, Frame; 332, Traveling caster; 333, Protective caster; 34, Second caster assembly; 341, Second caster; 40, Recycling pipe; 50, Transport channel. Detailed Implementation

[0034] In the description of the embodiments in this application, it should be noted that the term "first direction" refers to the direction based on the attached... Figure 2 The directions or positional relationships shown, "above" and "horizontal" are based on the attached... Figure 4 The orientation or positional relationship shown is merely for the convenience of describing the embodiments of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0035] This application provides a channel decontamination device; please refer to [link / reference]. Figure 1 The channel cleaning device includes a cantilever 1, a drum assembly 2, and a cleaning mechanism 3. The drum assembly 2 includes a drum 22 rotatably mounted on the cantilever 1 and a take-up / de-up line 21 wound on the drum 22. The cleaning mechanism 3 is connected to the take-up / de-up line 21.

[0036] The cleaning unit 3 is used to clean the transport channel 50 containing radioactive contaminants.

[0037] By rotating the drum assembly 2, the cleaning mechanism 3 can clean different locations within the transport channel 50.

[0038] When setting the placement of cantilever 1, the extension direction of cantilever 1 can be roughly consistent with the extension direction of transport channel 50.

[0039] For example, if a gantry rail is provided above the transport channel 50, the cantilever 1 can be installed on the gantry rail, and the cantilever 1 can be fixed on the gantry rail or slide along the gantry rail.

[0040] The drum 22 can be fixed to the cantilever 1, and the drum 22 can also move in the extension direction of the cantilever 1. For example, a slide rail can be provided on the cantilever 1, and the drum 22 is slidably connected to the slide rail. The drum 22 can slide along the slide rail under the action of external force. Alternatively, the channel cleaning device can also be provided with a drive mechanism, which drives the drum 22 to slide along the slide rail.

[0041] Furthermore, regardless of whether the drum 22 is fixed to the cantilever 1 or can move in the extending direction of the cantilever 1, for

[0042] Please see Figure 2 and Figure 3 The cleaning mechanism 3 includes a cleaning component 31 and a first support component 32. The cleaning component 31 includes a cleaning disc 311, a cleaning nozzle 312, and a brush layer 313, with the brush layer 313 surrounding the periphery of the cleaning nozzle 312. The first support component 32 is disposed on one side of the cleaning disc 311 along a first direction, and the cleaning nozzle 312 and the brush layer 313 are disposed on the side of the cleaning disc 311 opposite to the first support component 32 along the first direction.

[0043] The number of cleaning nozzles 312 can be one or more.

[0044] Figure 5 The cleaning assembly 31 shown is provided with a plurality of cleaning nozzles 312, and a brush layer 313 surrounds the periphery of all cleaning nozzles 312. In other embodiments, the brush layer 313 may also surround the periphery of each cleaning nozzle 312 separately, which is equivalent to the brush layer 313 separating two adjacent cleaning nozzles 312.

[0045] During the cleaning process, the cleaning mechanism 3 is placed inside the transport channel 50. The first direction of the cleaning disc 311 can be roughly consistent with the width direction of the transport channel 50, that is, the cleaning nozzle 312 and the brush layer 313 face the side wall of the transport channel 50. The cleaning nozzle 312 can spray cleaning liquid towards the side wall of the transport channel 50. The cleaning liquid can be water or other liquids containing cleaning components.

[0046] It should be noted that during the cleaning process, the cleaning nozzle 312 and the brush layer 313 first clean the side wall of one side of the transport channel 50. After the cleaning is completed, the direction of the cleaning mechanism 3 is adjusted so that the cleaning nozzle 312 and the brush layer 313 face the side wall of the other side of the transport channel 50 to clean the side wall of the other side of the transport channel 50.

[0047] The first support assembly 32 includes a telescopic device 321, which adjusts the length of the cleaning mechanism 3 along the first direction by extending and retracting along the first direction.

[0048] Specifically, before the cleaning mechanism 3 is placed into the transport channel 50, the telescopic device 321 is in a retracted state, and the length of the cleaning mechanism 3 along the first direction is relatively small, so as to facilitate the placement of the cleaning mechanism 3 into the transport channel 50 and the adjustment of its initial position within the transport channel 50. After the cleaning mechanism 3 is positioned within the transport channel 50, the telescopic device 321 extends, so that the first support assembly 32 and the brush layer 313 of the cleaning mechanism 3 abut against the side walls on both sides of the transport channel 50, respectively. After abutment, the cleaning mechanism 3 can be activated to clean the side walls of the transport channel 50. Throughout the cleaning process, the first support assembly 32 and the brush layer 313 of the cleaning mechanism 3 abut against the side walls on both sides of the transport channel 50. The cleaning nozzle 312 sprays the cleaning fluid onto the side walls of the transport channel 50, and the radioactive material dissolves into the cleaning fluid. Because the brush layer 313 surrounds the cleaning nozzle 312 and abuts against the side walls, it reduces the contact between the cleaning fluid containing radioactive material and the outside air, thereby reducing the generation of radioactive aerosols. Even if a small amount of radioactive aerosol is generated, it can be blocked by the brush layer 313 to effectively control the spread of radioactive aerosols. In addition, during the cleaning process, because the first support assembly 32 and the brush layer 313 of the cleaning mechanism 3 abut against the side walls on both sides of the transport channel 50, the cleaning nozzle 312 will not shake due to the high-pressure backlash of the cleaning fluid, and it will not deviate from its original decontamination path, thus significantly improving the decontamination effect.

[0049] In other words, the channel decontamination device of this application embodiment, by setting a cleaning mechanism 3 with a cleaning nozzle 312 and a brush layer 313 and a first support component 32 with a telescopic device 321, can make the first support component 32 and the brush layer 313 of the cleaning mechanism 3 abut against the side walls on both sides of the transport channel 50 during the cleaning process. The brush layer 313 surrounding the cleaning nozzle 312 and abutting against the side wall can not only reduce the full contact between the cleaning liquid containing radioactive substances and the outside air, thereby reducing the generation of radioactive aerosols, but also effectively control the diffusion of radioactive aerosols. The cleaning nozzle 312 can also remain stable during the cleaning process and will not shake due to the high pressure back force of the cleaning liquid. The channel decontamination device of this application embodiment can not only effectively reduce the generation of radioactive aerosols, but also have a good decontamination effect.

[0050] In one embodiment, please refer to Figure 5 For a channel cleaning device with multiple cleaning nozzles 312, the multiple cleaning nozzles 312 can be arranged in a cross shape along two intersecting directions. This arrangement can use a relatively small number of cleaning nozzles 312 to clean a relatively large cleaning surface, so that the effect of each cleaning nozzle 312 is maximized.

[0051] More preferably, please refer to Figure 5 Multiple cleaning nozzles 312 can be arranged in a cross shape.

[0052] In one embodiment, please refer to Figure 2 and Figure 5 The cleaning tray 311 can be provided with a receiving groove 311a on the side away from the first support component 32 along the first direction. The brush layer 313 surrounds the outer periphery of the receiving groove 311a, and the cleaning nozzle 312 is provided in the receiving groove 311a. In this way, it is convenient to set the cleaning nozzle 312, and it can also ensure that after the brush layer 313 abuts against the side wall of the transport channel 50, the receiving groove 311a can form a relatively closed space. Therefore, it can not only better prevent the cleaning liquid containing radioactive substances from contacting the outside air, but also better prevent the generated radioactive aerosol from spreading to the outside.

[0053] In one embodiment, please refer to Figure 3 The first support component 32 includes a first caster component 322, which includes a first caster 3223. The first caster component 322 is located on the side of the telescopic device 321 away from the cleaning disc 311 in the first direction. That is, when the telescopic device 321 is extended, the first caster 3223 contacts the side wall of the transport channel 50 near the first support component 32. The first caster 3223 can roll along the side wall of the transport channel 50 to reduce the friction between the first support component 32 and the side wall, so that the cleaning mechanism 3 can move freely along the side wall.

[0054] In one embodiment, please refer to Figure 3 The first support component 32 also includes a mounting bracket 323, which is disposed on the side of the telescopic device 321 away from the cleaning disc 311 along the first direction, and the first caster assembly 322 can be disposed on the mounting bracket 323.

[0055] Further, please refer to Figure 3 The first caster assembly 322 includes a caster mounting bracket 3222, and a first caster 3223 is rotatably connected to the caster mounting bracket 3222. The first support assembly 32 also includes a first elastic element 324, which is disposed between the caster mounting bracket 3222 and the mounting bracket 323 and extends and retracts in a first direction. When the first caster 3223 contacts the side wall of the transport channel 50, the first elastic element 324 between the caster mounting bracket 3222 and the mounting bracket 323 is in an elastically compressed state. The first elastic element 324 can play a buffering role, enabling the cleaning mechanism 3 to operate more stably and efficiently in the transport channel 50. Moreover, it is less likely that the first caster 3223 will get stuck due to garbage or other substances on the side wall of the transport channel 50.

[0056] For example, please refer to Figure 3 The mounting bracket 323 may include a first mounting plate 3231 and a sleeve 3232 disposed on the first mounting plate 3231. The first caster assembly 322 includes a guide rod 3221 connected to the caster fixing bracket 3222. The guide rod 3221 passes through the sleeve 3232 and slides along the first direction. Thus, the movement of the caster fixing bracket 3222 along the first direction can be guided, ensuring that the first elastic member 324 can be compressed and extended well along the first direction.

[0057] Further, please refer to Figure 2 and Figure 3 The first elastic element 324 can be sleeved on the guide rod 3221 and abut against the caster fixing frame 3222 and the sleeve 3232 respectively. Under the action of the guide rod 3221, the first elastic element 324 can extend and retract in the first direction with more precision, effectively avoiding the situation where the cleaning mechanism 3 is deviated due to the non-directional elastic force of the first elastic element 324.

[0058] In one embodiment, please refer to Figure 3 The channel cleaning device may also include a second caster assembly 34. The second caster assembly 34 is located on the side of the cleaning tray 311 where the brush layer 313 is provided and includes a second caster 341. When the telescopic device 321 is extended, the second caster 341 contacts the side wall of the transport channel 50 near the brush layer 313 to reduce the friction between the brush layer 313 and the side wall, so that the cleaning mechanism 3 can move freely along the side wall.

[0059] In one embodiment, please refer to Figure 3 The cleaning assembly 31 also includes a second mounting plate 314 and a second elastic member 315. The second mounting plate 314 is disposed on the side of the cleaning disc 311 opposite to the brush layer 313 along the first direction. The second elastic member 315 is disposed between the cleaning disc 311 and the second mounting plate 314 and extends and retracts along the first direction. The second caster assembly 34 is disposed on the second mounting plate 314. When the cleaning mechanism 3 is in operation, the second elastic member 315 elastically compresses and applies a certain elastic pressure to the cleaning disc 311, ensuring that the brush layer 313 can better adhere to the side wall of the transport channel 50 to prevent the generation and diffusion of radioactive aerosols.

[0060] It should be noted that, Figure 3 The cleaning mechanism 3 shown is provided with both a first caster assembly 322 and a second caster assembly 34. In some other embodiments, only the first caster assembly 322 may be provided without the second caster assembly 34, or only the second caster assembly 34 may be provided without the first caster assembly 322.

[0061] In one embodiment, please refer to Figure 3The first support component 32 also includes a support bracket 325, which is connected to the second mounting plate 314 and the telescopic device 321 on opposite sides along the first direction. The support bracket 325 facilitates the installation of the telescopic device 321.

[0062] The structure of the support bracket 325 is not limited; for example, please refer to [link to relevant documentation]. Figure 1 and Figure 3 The cleaning assembly 31 includes a connecting joint 316 communicating with the cleaning nozzle 312. The connecting joint 316 is located on the side of the cleaning disc 311 facing away from the cleaning assembly 31 along a first direction. The support bracket 325 may include a third mounting plate 3251 and a plurality of support rods 3252. The plurality of support rods 3252 surround the periphery of the connecting joint 316 and are connected to a second mounting plate 314. The third mounting plate 3251 is disposed at one end of the plurality of support rods 3252 facing away from the second mounting plate 314 along the first direction. The support bracket 325 formed by the plurality of support rods 3252 and the third mounting plate 3251 not only has a good supporting function, but also effectively protects the connecting joint 316, reducing the risk of damage to the connecting joint 316.

[0063] In one embodiment, the channel decontamination device further includes a wastewater recovery mechanism, which includes a wastewater suction device, a wastewater recovery tank, and a recovery pipe 40 connected to the wastewater recovery tank. For a cleaning tray 311 with a receiving tank 311a, the cleaning tray 311 can be provided with a suction port 311b connected to the receiving tank 311a. The recovery pipe 40 is connected to the suction port 311b. After the wastewater suction device is started, a negative pressure is formed in the receiving tank 311a, thereby sucking the decontamination cleaning liquid back into the wastewater recovery tank. The recovered waste liquid can be temporarily stored and periodically treated in a centralized manner, effectively preventing the decontamination waste liquid from causing secondary contamination to the sidewalls of the decontamination channel.

[0064] In one embodiment, the take-up and release line 21 can be a water supply pipe, which is connected to the cleaning nozzle 312 through the connecting joint 316 and provides a continuous cleaning solution. In other words, the take-up and release line 21 is not only used for taking up and releasing the cleaning mechanism 3, but can also be used to provide the cleaning solution.

[0065] Optionally, the water supply pipe can be a high-pressure hose to meet the higher liquid pressure required when the cleaning nozzle 312 is working.

[0066] In one embodiment, please refer to Figure 5 The cleaning assembly 31 also includes a retaining ring 317 fitted around the outer periphery of the brush layer 313. The retaining ring 317 can be connected to the cleaning disc 311 by a snap to prevent it from falling off. The retaining ring 317 can effectively prevent the brush layer 313 from collapsing outward due to excessive pressure in the first direction, and can also block the outward diffusion of cleaning liquid containing radioactive substances.

[0067] In one embodiment, please refer to Figure 1 and Figure 4 The first support component 32 can be detachably connected to the cleaning component 31, and the cleaning mechanism 3 also includes a second support component 33.

[0068] Figure 4 The second support assembly 33 shown includes a frame 331 and travel casters 332 and protective casters 333 mounted on the frame 331. The travel casters 332 are located at the bottom of the frame 331, and the protective casters 333 are located on the outer side of the frame 331 in the lateral direction. The travel casters 332 are used to contact the bottom wall of the transport channel 50 and roll along the bottom wall of the transport channel 50, and the protective casters 333 are used to contact the side wall of the transport channel 50 and roll along the side wall of the transport channel 50.

[0069] Figure 4 The frame 331 is provided with protective casters 333 on opposite sides along the lateral direction. In other embodiments, protective casters 333 may be provided only on one side of the frame 331 along the lateral direction.

[0070] In other embodiments, the second support component 33 may only have the entry caster 332 without the protective caster 333, or only have the protective caster 333 without the entry caster 332.

[0071] The channel cleaning device has a first installation configuration in which the cleaning assembly 31 and the first support assembly 32 are detachably connected (i.e., Figure 2 The second mounting configuration (i.e., the configuration shown) and the second mounting configuration in which the cleaning assembly 31 and the second support assembly 33 are detachably connected. Figure 4 (As shown in the diagram), when the channel cleaning device is in the second installation configuration, the cleaning disc 311 is located above the cleaning nozzle 312 and the brush layer 313.

[0072] When the channel cleaning device is in its first installation configuration, such as Figure 2 As shown, the cleaning mechanism 3 consists of a first support component 32 and a cleaning component 31. At this time, the cleaning mechanism 3 is used to clean the side wall of the transport channel 50. The specific cleaning method and installation structure are as described above and will not be repeated here.

[0073] When the channel cleaning device is in the second installation configuration, such as Figure 4As shown, the first support assembly 32 is removed from the cleaning assembly 31, and the cleaning assembly 31 is detachably connected to the second support assembly 33. It should be noted that in the second installation configuration, the take-up and retraction pipeline 21 is connected to the cleaning assembly 31. In this configuration, the cleaning assembly 31 is used to clean the bottom wall of the transport channel 50; that is, the side of the cleaning tray 311 with the cleaning nozzles 312 and the brush layer 313 faces the bottom wall of the transport channel 50. The second support assembly 33 drives the cleaning assembly 31 to move within the transport channel 50, and cleans the bottom wall of the transport channel 50 through the cleaning nozzles 312 and the brush layer 313. Due to the weight of the cleaning assembly 31 itself, the brush layer 313 can adhere to the bottom wall of the transport channel 50 during cleaning, thereby effectively preventing the large-scale generation and diffusion of radioactive aerosols.

[0074] Additionally, please see Figure 4 The cleaning component 31 can be positioned on the second support component 33 to one side of the second support component 33. That is, during the cleaning of the bottom wall of the transport channel 50, the cleaning component 31 is closer to one side wall of the transport channel 50. After the second support component 33 moves the cleaning component 31 from the first end of the transport channel 50 to the opposite second end, the cleaning component 31 and the second support component 33 can be removed from the transport channel 50. After the direction of the second support component 33 is reversed, the cleaning component 31 and the second support component 33 are put back into the transport channel 50, and the second support component 33 moves the cleaning component 31 from the second end of the transport channel 50 to the opposite first end. That is, at this time, the cleaning component 31 is closer to the other side wall of the transport channel 50. This ensures that the cleaning component 31 can effectively clean the part of the bottom wall close to the side wall, thereby improving the cleaning effect of the bottom wall.

[0075] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0076] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A channel cleaning device, characterized in that, include: cantilever; A drum assembly, the drum assembly including a drum rotatably disposed on the cantilever and a take-up / unwinding line wound on the drum; A cleaning mechanism connected to the take-up and release pipeline, the cleaning mechanism including a cleaning component and a first support component, the cleaning component including a cleaning disc, a cleaning nozzle and a brush layer surrounding the cleaning nozzle, the first support component including a telescopic device, the first support component being disposed on one side of the cleaning disc along a first direction, the cleaning nozzle and the brush layer being disposed on the side of the cleaning disc opposite to the first support component along the first direction, the telescopic device extending and retracting along the first direction to adjust the length of the cleaning mechanism along the first direction; The first support assembly further includes a first caster assembly, a mounting bracket, and a first elastic element. The first caster assembly includes a first caster and a caster mounting bracket rotatably connected to the first caster. The first caster assembly is disposed on the side of the telescopic device opposite to the cleaning tray along the first direction. The mounting bracket is disposed on the side of the telescopic device opposite to the cleaning tray along the first direction. The first caster assembly is mounted on the mounting bracket. The first elastic element is disposed between the caster mounting bracket and the mounting bracket and extends and retracts along the first direction; and / or, The channel cleaning device also includes a second caster assembly, which includes a second caster and is located on the side of the cleaning tray where the brush layer is provided.

2. The channel decontamination device according to claim 1, characterized in that, The cleaning assembly includes a plurality of the cleaning nozzles, and the brush layer surrounds the periphery of all the cleaning nozzles.

3. The channel decontamination device according to claim 2, characterized in that, The cleaning nozzles are multiple, and the multiple cleaning nozzles are arranged in a cross shape along two intersecting directions.

4. The channel decontamination device according to claim 1, characterized in that, The first support assembly includes the first caster assembly, the mounting bracket, and the first elastic element. The mounting bracket includes a first mounting plate and a sleeve disposed on the first mounting plate. The first caster assembly includes a guide rod connected to the caster fixing bracket. The guide rod passes through the sleeve and slides along the first direction.

5. The channel decontamination device according to claim 4, characterized in that, The first elastic element is sleeved on the guide rod and abuts against the caster fixing frame and the sleeve, respectively.

6. The channel decontamination device according to claim 1, characterized in that, The channel cleaning device includes a second caster assembly, and the cleaning assembly further includes a second mounting plate and a second elastic member. The second mounting plate is disposed on the side of the cleaning disc away from the brush layer along the first direction. The second elastic member is disposed between the cleaning disc and the second mounting plate and extends and retracts along the first direction. The second caster assembly is disposed on the second mounting plate.

7. The channel decontamination device according to claim 6, characterized in that, The first support assembly further includes a support bracket, which is connected to the second mounting plate and the telescopic device on opposite sides along the first direction, respectively.

8. The channel decontamination device according to claim 7, characterized in that, The cleaning assembly includes a connecting joint communicating with the cleaning nozzle, the connecting joint being located on the side of the cleaning disc away from the brush layer along the first direction; the support bracket includes a third mounting plate and a plurality of support rods, the plurality of support rods surrounding the periphery of the connecting joint and connected to the second mounting plate, the third mounting plate being disposed at one end of the plurality of support rods away from the second mounting plate along the first direction.

9. The channel decontamination device according to any one of claims 1-3, characterized in that, The cleaning disc has a receiving groove on the side opposite to the first support assembly along the first direction, the brush layer surrounds the outer periphery of the receiving groove, and the cleaning nozzle is disposed in the receiving groove.

10. The channel decontamination device according to claim 9, characterized in that, The channel decontamination device also includes a sewage recovery mechanism, which includes a sewage suction device, a sewage recovery tank, and a recovery pipe connected to the sewage recovery tank. The cleaning tray has a suction port connected to the receiving tank, and the recovery pipe is connected to the suction port.

11. The channel decontamination device according to any one of claims 1-3, characterized in that, The feed line is a water supply pipe, and the water supply pipe is connected to the cleaning nozzle.

12. The channel decontamination device according to any one of claims 1-3, characterized in that, The cleaning assembly also includes a retaining ring fitted around the outer periphery of the brush layer.

13. The channel decontamination device according to claim 1, characterized in that, The reel assembly is movable in the extension direction of the cantilever.

14. The channel decontamination device according to any one of claims 1-3, characterized in that, The first support assembly is detachably connected to the cleaning assembly. The cleaning mechanism further includes a second support assembly, which includes a frame and at least one of a travel caster and a protective caster. The travel caster is located at the bottom of the frame, and the protective caster is located on the outer side of the frame laterally. The channel cleaning device has a first installation configuration in which the cleaning component is detachably connected to the first support component and a second installation configuration in which the cleaning component is detachably connected to the second support component. When the channel cleaning device is in the second installation configuration, the cleaning disc is located above the cleaning nozzle and the brush layer.

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