Tunnel top automatic backflow water atomization cleaning device
By designing the automatic return water atomization cleaning device at the top of the tunnel, the recycling of water resources is realized, solving the problem of waste of water resources during cleaning the top of the tunnel inner wall, improving cleaning efficiency and reducing costs.
Patent Information
- Application Number
- CN202510669055.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2025-08-01
AI Technical Summary
The existing tunnel inner wall top cleaning device has serious waste of water resources during the cleaning process, which increases the cost of cleaning operations.
A automatic return water atomization cleaning device on the top of the tunnel is designed. The water recycling is realized through the water storage tank, water spray pipe and deflector structure on the substrate. The sprayed water droplets drip along the inclined surface of the deflector to the collection box, filtered by the filter element and then flow back to the water storage tank.
It improves cleaning efficiency, reduces water resource waste, reduces cleaning operation costs, and provides flexible angle adjustments and convenient operation experience.
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Figure CN120401401A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tunnel cleaning, and in particular to an automatic return water atomization cleaning device for the top of a tunnel. Background Art
[0002] Tunnels, as a key component of modern transportation networks, the maintenance of their internal environment is directly related to traffic safety and the long-term stability of the structure. With the continuous daily operation, dust, stains and other impurities often accumulate on the top of the inner wall of the tunnel, which not only damages the visual beauty of the tunnel, but may also accelerate structural corrosion and reduce the service life. More seriously, the pollutants accumulated on the top may also obscure lighting fixtures and surveillance cameras, posing a potential threat to the daily operation and safety monitoring of the tunnel. Therefore, regular and effective cleaning and maintenance of the top of the inner wall of the tunnel is an essential part of ensuring the safe and efficient operation of the tunnel.
[0003] Currently, there is already a special device on the market for cleaning the top of the inner wall of a tunnel. This device mainly consists of a moving plate, four moving wheels, a water storage tank, a water supply pump, a spray pipe and other components. Among them, one end of the spray pipe is connected to the water storage tank, and the other end is equipped with a nozzle. Through the action of the water supply pump, water is pumped from the water storage tank to the spray pipe, and finally sprayed out in the form of mist or water flow by the nozzle to achieve the cleaning purpose. During this process, the staff needs to hold the atomizing nozzle and perform manual operations on the top of the tunnel.
[0004] However, although this cleaning method meets the cleaning requirements of the top of the inner wall of the tunnel to a certain extent, its water resource utilization efficiency needs to be improved; specifically, most of the sprayed water directly drips onto the tunnel floor after completing the cleaning task, resulting in a large waste of water resources, increasing the cost of cleaning operations, and there is room for improvement. Summary of the Invention
[0005] The purpose of the present application is to provide an automatic return water atomization cleaning device for the top of a tunnel to solve the problem of serious waste of water resources during the cleaning process in the above related technologies.
[0006] An automatic return water atomization cleaning device for the top of a tunnel provided by the present application adopts the following technical solutions: An automatic backflow water atomization cleaning device for the top of a tunnel, comprising a substrate, a plurality of rollers fixedly arranged on the bottom surface of the substrate, and a handle hinged to the side surface of the substrate. A water storage tank is arranged on the upper side surface of the substrate, and collecting boxes with openings on the upper side are arranged on both sides of the substrate opposite to the water storage tank; on the upper side edges of the two collecting boxes close to each other, a flow guide plate is hinged, and an adjusting member for fixing the rotating state of the flow guide plate is arranged on the substrate; the upper edges of the two flow guide plates can rotate towards each other to an abutting state and be fixed. At this time, the flow guide plate is obliquely arranged above the water storage tank; a water spray pipe is fixedly arranged on the side surface of the flow guide plate away from the water storage tank, and a plurality of atomizing nozzles are installed on the side surface of the water spray pipe away from the flow guide plate. A first hose connecting the collecting box and the water storage tank, a second hose connecting the water storage tank and the water spray pipe, and a power member for injecting the water in the water storage tank into the water spray pipe through the second hose are arranged on the substrate. A filtering member is arranged at the connection of the collecting box and the first hose; the bottom surface of the collecting box is higher than the upper side edge of the water storage tank.
[0007] By adopting the above technical solution, in this device, the water storage tank on the substrate stores cleaning water, and the power member injects the water into the water spray pipe and sprays it onto the top inner wall of the tunnel through the atomizing nozzles. The sprayed water droplets drip along the inclined surface of the flow guide plate and flow into the collecting box. The water in the collecting box is filtered by the filtering member and then flows back to the water storage tank through the first hose, realizing the recycling of water resources. In addition, the adjusting member allows the inclination angle of the flow guide plate to be adjusted according to actual needs to ensure that the water droplets smoothly flow into the collecting box. This device not only improves the cleaning efficiency, but also greatly reduces the waste of water resources and reduces the cleaning operation cost.
[0008] Optionally, the adjusting member includes an adjusting rod and an adjusting block. One end of the adjusting rod is hinged to the side surface of the flow guide plate away from the water spray pipe, the other end of the adjusting rod is hinged to the adjusting block, and a plurality of adjusting slots for the adjusting block to insert are opened on the substrate.
[0009] By adopting the above technical solution, this design allows the operator to easily adjust the inclination angle of the flow guide plate according to the actual height of the tunnel and the cleaning requirements. By simply inserting the adjusting block into different adjusting slots and fixing it, the precise adjustment of the angle of the flow guide plate can be realized to ensure that the water droplets can smoothly flow into the collecting box along the inclined surface of the flow guide plate.
[0010] Optionally, a protective curtain is arranged above the substrate. The flow guide plate can rotate upwards to a vertical state and be fixed. The two opposite side edges of the protective curtain are respectively detachably connected to the upper side edges of the two flow guide plates.
[0011] By adopting the above technical solution, when cleaning is not required, the deflector can be rotated upward to a vertical state and fixed. At this time, the protective curtain can be conveniently installed on the upper side edges of the two deflectors to form a protective barrier. At this time, the cleaning device can be used as a transportation tool, and the protective curtain can be used to protect the transported products. At the same time, the detachable connection method between the protective curtain and the deflector makes the installation and disassembly process simple and fast, facilitating flexible adjustment by the operator according to actual needs.
[0012] Optionally, hooks are fixedly provided on the opposite side edges of the protective curtain, and clamping rings for the hooks to be clamped into are fixedly provided on the upper side edges of the deflector.
[0013] By adopting the above technical solution, when the protective curtain needs to be installed on the deflector, only need to align the hooks with the clamping rings and gently snap them in to achieve quick connection. This design not only simplifies the installation steps, improves work efficiency, but also ensures a tight fit between the protective curtain and the deflector.
[0014] Optionally, the handle can be rotated, adjusted and fixed. A locking block is fixedly provided on the outer periphery of the handle, and a locking notch is provided on the locking block; when the handle and the deflector are both in a vertical state, the side edge of the deflector can be clamped into the locking notch.
[0015] By adopting the above technical solution, the handle can be rotated, adjusted and fixed, enabling the operator to flexibly adjust the angle of the handle according to actual situations such as personal height, operating habits or the internal space of the tunnel, so as to provide a more comfortable and convenient operating experience. At the same time, when the handle and the deflector are both in a vertical state, the side edge of the deflector can be cleverly clamped into the locking notch on the locking block to enhance the stability of the deflector in the vertical state.
[0016] Optionally, a hinge seat rotatably connected to the lower end of the handle is fixedly provided on the side surface of the substrate. A fixing through hole is provided on the hinge seat, a fixing screw hole is provided on the handle, and a fixing bolt passing through the fixing through hole and screwed into the fixing screw hole is provided outside the substrate.
[0017] By adopting the above technical solution, this design not only allows the operator to adjust the angle of the handle according to actual needs and firmly lock it with the fixing bolt, preventing inconvenience in operation or potential safety hazards caused by the handle shaking during the cleaning operation. At the same time, the disassembly and installation process of the fixing bolt is also very simple, greatly improving the convenience and practicality of the device.
[0018] Optionally, a scraper is slidably provided on the side surface of the deflector facing the water spray pipe. A driving member for driving the scraper to reciprocate in the direction close to the handle is installed on the deflector, and the scraper is used for cleaning the side surface of the deflector facing the water spray pipe.
[0019] By adopting the above technical solution, during the cleaning operation, the scraper can automatically remove the stains and residues accumulated on the flow guide plate, keeping the flow guide plate clean and unobstructed. This not only avoids the problem that the smooth inflow of water droplets into the collection box is affected due to the blockage of the flow guide plate, but also reduces the frequency and difficulty of manual cleaning, improving the cleaning efficiency.
[0020] Optionally, a locking notch is provided on the scraper; when the scraper slides to a state where it abuts against the vertical handle, the locking block can penetrate into the locking notch.
[0021] By adopting the above technical solution, when the handle is in the vertical state, the driving member can drive the scraper to slide in a direction close to the handle, so that a part of the locking block can penetrate into the locking notch, thereby further fixing the vertical handle and enhancing the installation stability of the handle and the flow guide plate in this state.
[0022] Optionally, when the handle is in the vertical state, a storage cavity for folding and placing the protective curtain is provided on the side surface facing the flow guide plate, and a blocking plate for blocking the opening of the storage cavity is provided outside the substrate.
[0023] By adopting the above technical solution, the operator only needs to fold the protective curtain and easily place it into the storage cavity to achieve the rapid storage of the protective curtain, avoiding the problems of damage or loss caused by the random placement of the protective curtain. At the same time, the blocking plate provided outside the substrate can tightly block the opening of the storage cavity, effectively preventing dust, sundries, etc. from entering the storage cavity and keeping the protective curtain clean and tidy. This design not only saves space but also improves the portability of the device.
[0024] Optionally, one side edge of the blocking plate is hinged to the opening edge of the storage cavity, a fastening through hole is provided on the other side of the blocking plate, a fastening screw hole is provided on the handle, and a fastening bolt that penetrates through the fastening through hole and is screwed into the fastening screw hole is provided outside the handle.
[0025] By adopting the above technical solution, one side edge of the blocking plate is hinged to the opening edge of the storage cavity, enabling the blocking plate to conveniently open or close the storage cavity. At the same time, the fastening through hole provided on the other side of the blocking plate cooperates with the fastening screw hole provided on the handle, allowing the operator to firmly fix the blocking plate by installing the fastening bolt.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: In this device, the water storage tank on the substrate stores cleaning water, the power member injects water into the spray pipe, and it is sprayed onto the top of the inner wall of the tunnel through the atomizing nozzle; the sprayed water droplets drip along the inclined surface of the flow guide plate and converge into the collection box. The water in the collection box is filtered by the filter element and then flows back to the water storage tank through the first hose, realizing the recycling of water resources. Brief Description of the Drawings
[0027] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0028] Figure 1 is the overall structural schematic diagram of the embodiment of the present application; Figure 2 is the cross-sectional structural schematic diagram showing the installation and cooperation of the cleaning component and the recycling component in the embodiment of the present application; Figure 3 is the partial structural schematic diagram showing the installation and cooperation of the adjusting member in the embodiment of the present application; Figure 4 is the structural schematic diagram showing the installation and cooperation of the protective curtain in the embodiment of the present application; Figure 5 is Figure 4 the enlarged schematic diagram of part A in Figure 6 is the partial cross-sectional structural schematic diagram showing the installation and cooperation of the handle in the embodiment of the present application; Figure 7 is the partial structural schematic diagram showing the installation and cooperation of the plugging plate in the embodiment of the present application; Figure 8 is the partial cross-sectional structural schematic diagram showing the handle and the guide plate in the vertical state in the embodiment of the present application.
[0029] In the figure, 1, substrate; 11, roller; 12, handle; 121, fixing screw hole; 122, storage cavity; 123, locking block; 1231, locking notch; 13, adjusting slot; 14, hinge seat; 141, fixing through hole; 15, fixing bolt; 16, plugging plate; 17, fastening bolt; 2, cleaning component; 3, cleaning component; 31, water storage tank; 32, water spraying pipe; 321, atomizing nozzle; 33, second hose; 34, power component; 4, recycling component; 41, collection box; 42, guide plate; 421, snap ring; 43, adjusting member; 431, adjusting rod; 432, adjusting block; 44, first hose; 45, driving component; 46, scraping plate; 461, locking notch; 5, protective curtain; 51, hook. Detailed Embodiments
[0030] The following will further elaborate on the present application in conjunction with all the drawings.
[0031] Embodiment: Refer to Figure 1, An automatic backflow water atomization cleaning device for the top of a tunnel, including a substrate 1, four rollers 11 fixedly arranged on the bottom surface of the substrate 1, and a handle 12 hinged on the vertical side surface of the substrate 1. Among them, a cleaning component 3 and a recycling component 4 are arranged on the substrate 1. The top of the inner wall of the tunnel is cleaned by the cleaning component 3, and the sprayed water is recycled by the recycling component 4.
[0032] Referring to Figure 1 and Figure 2 , the cleaning component 3 includes a water storage tank 31 installed on the upper side surface of the substrate 1, and the recycling component 4 includes collection boxes 41 fixedly arranged on the substrate 1 and located on the opposite side surfaces of the water storage tank 31. The upper side surface of the collection box 41 is open; a diversion plate 42 is hinged on the upper side edges of the two collection boxes 41 close to each other, and an adjusting member 43 for fixing the rotation state of the diversion plate 42 is arranged on the substrate 1; the upper edges of the two diversion plates 42 can rotate towards each other to the abutting state and be fixed, and can also be adjusted to the required inclination angle as needed. At this time, the two diversion plates 42 are jointly inclined above the water storage tank 31; A water spray pipe 32 is fixedly arranged on the side surface of the diversion plate 42 away from the water storage tank 31. A plurality of atomizing nozzles 321 are uniformly installed on the outer periphery of the water spray pipe 32 away from the diversion plate 42. A first hose 44 connecting the collection box 41 and the water storage tank 31, a second hose 33 connecting the water storage tank 31 and the water spray pipe 32, and a power member 34 for injecting the water in the water storage tank 31 into the water spray pipe 32 through the second hose 33 are arranged on the substrate 1. A filtering member (not shown in the figure) is fixedly arranged at the connection of the collection box 41 and the first hose 44. The filtering member is a conventional filter screen or filter cotton and will not be elaborated here; The power member 34 is used to inject the water in the water storage tank 31 into the water spray pipe 32 through the second hose 33, and then spray it from the atomizing nozzles 321 to the top of the inner wall of the tunnel. Then the water droplets drip onto the inclined surface of the diversion plate 42 and flow into it; and since the bottom surface of the collection box 41 is higher than the upper side edge of the water storage tank 31, the water in the collection box 41 flows into the collection box 41 through the first hose 44 after being filtered by the filtering member.
[0033] Referring to Figure 1 [[ID=1ó]]and Figure 3 , a scraping plate 46 is slidably arranged on the side surface of the diversion plate 42 facing the water spray pipe 32. A driving member 45 for driving the scraping plate 46 to reciprocate in the direction close to the handle 12 is arranged on the diversion plate 42. The driving member 45 is a motor-screw combination structure and will not be elaborated here; one side of the scraping plate 46 abuts against the inclined side surface of the diversion plate 42, so as to clean the side surface of the diversion plate 42 facing the water spray pipe 32 through the scraping plate 46.
[0034] Referring to Figure 3, the adjusting member 43 includes an adjusting rod 431 and an adjusting block 432. One end of the adjusting rod 431 is hinged to the side surface of the deflector 42 away from the water spray pipe 32, and the other end of the adjusting rod 431 is hinged to the adjusting block 432. A plurality of adjusting slots 13 for the adjusting block 432 to insert are formed on the base plate 1. When it is necessary to adjust the inclination state of the deflector 42, the adjusting block 432 can be inserted into different adjusting slots 13.
[0035] Refer to Figure 4 and Figure 5 , a protective curtain 5 made of non-woven fabric is provided above the base plate 1. Two hooks 51 are fixedly provided on both opposite side edges of the protective curtain 5, and a clamping ring 421 for the hooks 51 to be clamped into is fixedly provided on the upper side edge of the deflector 42. When the deflector 42 rotates upward to the vertical state and is fixed, the hooks 51 on the protective curtain 5 can be clamped into the clamping ring 421 on the deflector 42, so as to realize the installation and cooperation of the protective curtain 5.
[0036] Refer to Figure 6 , a hinge seat 14 rotatably connected to the lower end of the handle 12 is fixedly provided on the side surface of the base plate 1. A fixing through hole 141 is formed in the hinge seat 14, a fixing screw hole 121 is formed in the handle 12, and a fixing bolt 15 passing through the fixing through hole 141 and screwed into the fixing screw hole 121 is provided outside the base plate 1. The fixing bolt 15 is a wing nut. The user can rotate and fix the handle 12 by tightening or rotating the fixing bolt 15.
[0037] Refer to Figure 7 , a storage cavity 122 for the protective curtain 5 to be folded and placed is formed on the side surface of the handle 12 facing the deflector 42 when the handle 12 is in the vertical state. A sealing plate 16 for blocking the opening of the storage cavity 122 is provided outside the base plate 1. One side edge of the sealing plate 16 is hinged to the opening edge of the storage cavity 122, a fastening through hole is formed on the other side of the sealing plate 16, a fastening screw hole is formed in the handle 12, and a fastening bolt 17 passing through the fastening through hole and screwed into the fastening screw hole is provided outside the handle 12. The fastening bolt 17 is also a wing nut, so as to realize the folding and storage of the protective curtain 5.
[0038] Refer to Figure 8 , a locking block 123 is fixedly provided on the outer periphery of the handle 12, and a locking notch 1231 is formed in the locking block 123. When the handle 12 and the deflector 42 are both in the vertical state, the side edge of the deflector 42 can be clamped into the locking notch 1231 to further fix the deflector 42 in the vertical state.
[0039] Refer to Figure 7 and Figure 8, a locking notch 461 is formed in the scraping plate 46; when the scraping plate 46 slides to be in the same position as the handle 12 in the vertical state, the driving member 45 can drive the scraping plate 46 to slide towards the handle 12, so that a part of the locking block 123 can penetrate into the locking notch 461 to further fix the handle 12 in the vertical state.
[0040] The implementation principle of the embodiment of the present application is as follows: The automatic backflow water atomization cleaning device for the top of the tunnel realizes the cleaning of the top inner wall of the tunnel and the recycling of water resources through the cleaning component 3 and the recycling component 4 on the substrate 1. The water storage tank 31 in the cleaning component 3 provides water source, and the power component 34 injects water into the spray pipe 32, which is sprayed onto the top of the tunnel by the atomizing nozzle 321, and the water droplets drip onto the guide plate 42 and flow into the collection box 41. The adjusting member 43 can adjust the inclination angle of the guide plate 42 to adapt to different cleaning requirements.
[0041] When cleaning is not required, the protective curtain 5 is taken out from the storage cavity 122 in advance, then the guide plate 42 and the handle 12 are both adjusted to the vertical state, and then the protective curtain 5 is installed above the substrate 1; at this time, the cleaning device can be used as a transportation tool, and the protective curtain 5 can be used to protect the transported products.
[0042] Unless otherwise defined, the terms or scientific terms used in this application should have the ordinary meaning understood by those with ordinary skills in the field to which this application belongs. The terms "first", "second", "third" and similar words used in the text of this application do not represent any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not represent a quantity limitation, but mean that there is at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.
[0043] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. An automatic backflow water atomization cleaning device for the tunnel top, characterized in that It includes a substrate (1), several rollers (11) fixedly arranged on the bottom surface of the substrate (1), and a handle (12) hinged to the side surface of the substrate (1). A water storage tank (31) is arranged on the upper side surface of the substrate (1), and collection boxes (41) with openings on the upper side are arranged on two opposite sides of the substrate (1) relative to the water storage tank (31); a diversion plate (42) is hinged on the upper side edges of the two collection boxes (41) close to each other, and an adjusting member (43) for fixing the rotation state of the diversion plate (42) is arranged on the substrate (1); the upper side edges of the two diversion plates (42) can rotate towards each other to the abutting state and be fixed. At this time, the diversion plate (42) is obliquely arranged above the water storage tank (31). A water spraying pipe (32) is fixedly arranged on the side surface of the diversion plate (42) far from the water storage tank (31). Several atomizing nozzles (321) are installed on the side surface of the water spraying pipe (32) far from the diversion plate (42). A first hose (44) connecting the collection box (41) and the water storage tank (31), a second hose (33) connecting the water storage tank (31) and the water spraying pipe (32), and a power member (34) for injecting the water in the water storage tank (31) into the water spraying pipe (32) through the second hose (33) are arranged on the substrate (1). A filtering member is arranged at the connection of the collection box (41) and the first hose (44); the bottom surface of the collection box (41) is higher than the upper side edge of the water storage tank (31).
2. The automatic backflow water atomization cleaning device for the tunnel top according to claim 1, characterized in that, The adjusting member (43) includes an adjusting rod (431) and an adjusting block (432). One end of the adjusting rod (431) is hinged to the side surface of the diversion plate (42) far from the water spraying pipe (32), the other end of the adjusting rod (431) is hinged to the adjusting block (432), and several adjusting slots (13) for the adjusting block (432) to insert are formed on the substrate (1).
3. The automatic backflow water atomization cleaning device for the tunnel top according to claim 1, characterized in that, A protective curtain (5) is arranged above the substrate (1). The diversion plate (42) can rotate upwards to the vertical state and be fixed. The two opposite side edges of the protective curtain (5) are respectively detachably connected to the upper side edges of the two diversion plates (42).
4. The automatic backflow water atomization cleaning device for the tunnel top according to claim 3, characterized in that, Hook-shaped fasteners (51) are fixedly arranged on the two opposite side edges of the protective curtain (5), and clamping rings (421) for the hook-shaped fasteners (51) to be clamped into are fixedly arranged on the upper side edges of the diversion plates (42).
5. The automatic backflow water atomization cleaning device for the tunnel top according to claim 3, characterized in that, The handle (12) can be rotated and adjusted and fixed. A locking block (123) is fixedly arranged on the outer periphery of the handle (12), and a locking notch (1231) is formed on the locking block (123); when the handle (12) and the diversion plate (42) are both in the vertical state, the side edge of the diversion plate (42) can be clamped into the locking notch (1231).
6. The automatic backflow water atomization cleaning device for the tunnel top according to claim 5, characterized in that, A hinge seat (14) rotatably connected to the lower end of the handle (12) is fixedly arranged on the side surface of the substrate (1). A fixing through hole (141) is formed on the hinge seat (14), a fixing screw hole (121) is formed on the handle (12), and a fixing bolt (15) passing through the fixing through hole (141) and screwed into the fixing screw hole (121) is arranged outside the substrate (1).
7. The automatic backflow water atomization cleaning device for the tunnel top according to claim 5, characterized in that, A scraper (46) is slidably provided on the side of the deflector (42) facing the water spray pipe (32). A driving member (45) for driving the scraper (46) to reciprocate in the direction close to the handle (12) is installed on the deflector (42). The scraper (46) is used for cleaning the side of the deflector (42) facing the water spray pipe (32).
8. The automatic backflow water atomization cleaning device for the tunnel top according to claim 7, characterized in that, A locking notch (461) is formed in the scraper (46); when the scraper (46) slides to a state where it abuts against the vertically - positioned handle (12), the locking block (123) can penetrate into the locking notch (461).
9. The automatic backflow water atomization cleaning device for the tunnel top according to claim 5, characterized in that, A storage cavity (122) for folding and placing the protective curtain (5) is formed on the side of the handle (12) facing the deflector (42) when the handle (12) is in the vertical state. A sealing plate (16) for blocking the opening of the storage cavity (122) is provided outside the substrate (1).
10. The automatic backflow water atomization cleaning device for the tunnel top according to claim 9, characterized in that, One side edge of the sealing plate (16) is hinged to the opening edge of the storage cavity (122). A fastening through - hole is formed on the other side of the sealing plate (16). A fastening screw hole is formed on the handle (12). A fastening bolt (17) passing through the fastening through - hole and then screwed into the fastening screw hole is provided outside the handle (12).
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