Road and bridge side guardrail cleaning device

Abstract

The invention discloses a road and bridge side guardrail cleaning device which comprises a water tank. The water tank is fixedly connected with the cleaning box, and a water conveying pipe is arranged on the periphery of the cleaning box. The water conveying pipe comprises two vertical pipes, and the vertical pipes are provided with a plurality of outer pipes; an inner pipe is arranged in the outer pipe in a sleeved mode, and the inner pipe and the outer pipe are connected in a sliding mode and are in close fit. A partition plate is arranged in the inner pipe, and two opposite water passing holes are formed in the partition plate; two supporting columns which are oppositely arranged are arranged on one side of the partition plate, the two supporting columns are located between the two water passing holes, and the two supporting columns are rotationally connected with a rotating piece; two protruding blocks are arranged on one side of the rotating piece, and the protruding blocks correspond to the water passing holes and are matched with the water passing holes in shape. The upper portions of the two supporting columns are fixedly connected with a connecting plate, the connecting plate is fixedly connected with a first electromagnetic part, the rotating part is provided with a first permanent magnet part corresponding to the protruding block, the first electromagnetic part corresponds to the first permanent magnet part, and the pollutant cleaning efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of bridge cleaning equipment, and in particular to a road bridge side guardrail cleaning device. Background Art

[0002] During construction, bridge guardrails, crucial components for ensuring the safety of construction workers and vehicles, are exposed to the elements for extended periods, easily accumulating pollutants such as dust, oil, and rainwater sediment. These pollutants not only impact the quality of bridge construction but can also accelerate the aging and corrosion of the guardrail material, compromising its structural stability.

[0003] Traditional guardrail cleaning methods rely primarily on manual wiping or high-pressure water jets. Manual cleaning is inefficient, labor-intensive, and poses safety risks. While high-pressure water jets are highly efficient, they are limited in effectiveness on complex guardrail structures, consume a lot of water, and struggle to achieve precise cleaning.

[0004] In recent years, some automated guardrail cleaning equipment has been gradually put into use. For example, some equipment uses a fixed nozzle to continuously spray water, combined with a brush roller for physical scrubbing. However, this type of equipment generally has the following problems: The water spray pressure is constant: it cannot be adjusted according to the degree of contaminant adhesion, resulting in unstable cleaning effect; Insufficient water flow impact: Continuous water jets can easily cause water film coverage, lacking sufficient impact force to remove stubborn stains; Single cleaning mode: lacks a dynamic adjustment mechanism and cannot adapt to guardrails of different shapes or levels of contamination; Unreasonable structural design: Some equipment is bulky and difficult to move, and is not suitable for narrow or curved guardrail areas.

[0005] Therefore, there is an urgent need to provide a road and bridge guardrail cleaning device with a reasonable structure, high cleaning efficiency and dynamic water spray control function to improve the cleaning effect and reduce maintenance costs. Summary of the Invention

[0006] The technical problem solved by the present invention is to provide a road bridge side guardrail cleaning device.

[0007] The present application provides a road and bridge side guardrail cleaning device, comprising: water tank; The water tank is fixedly connected to the cleaning box, and a water pipe communicating with the water tank is provided on the periphery of the cleaning box; The water delivery pipe comprises two vertical pipes arranged opposite to each other, wherein the vertical pipes are provided with a plurality of outer pipes communicating with the vertical pipes along their axial directions; The inner tube is sleeved inside the outer tube, and the inner tube and the outer tube are slidably connected and tightly matched; A partition is provided in the inner tube, and the partition is provided with two water holes arranged opposite to each other; Two supporting columns are arranged opposite to each other on one side of the partition, and the two supporting columns are located between the two water holes, and the two supporting columns are rotatably connected to the rotating member; Two protrusions are provided on one side of the rotating member, and the protrusions are arranged correspondingly to the water holes and have matching shapes; The upper parts of the two support columns are fixedly connected to a connecting plate, and the connecting plate is fixedly connected to a first electromagnetic component. The rotating component is provided with a first permanent magnet component corresponding to the protrusion. The first electromagnetic component is arranged corresponding to the first permanent magnet component. The electromagnetic coil of the first electromagnetic component generates an alternating magnetic field, applies a magnetic field force to the first permanent magnet component, and drives the rotating component to reciprocate around the fixed axis. The two protrusions alternately close or release the water hole.

[0008] Furthermore, the inner wall of the water outlet cavity of the inner tube is provided with a plurality of arc-shaped protrusions arranged at intervals, and the axial direction of the arc-shaped protrusions is inclined to the axial direction of the inner tube.

[0009] Furthermore, an annular sliding portion is provided on the outer periphery of the inner tube, and the sliding portion is slidably matched with the inner wall of the outer tube. The side wall of the sliding portion is provided with two second permanent magnets arranged at intervals. An annular limiting plate is provided in the open end of the outer tube, and the limiting plate is slidably matched with the outer wall of the inner tube. The limiting plate is provided with a second electromagnetic component, and the second electromagnetic component and the second permanent magnet are arranged correspondingly.

[0010] Furthermore, an elastic member is fixed between the sliding portion and the limiting plate.

[0011] Furthermore, a connecting pipe is provided on the side of the water tank, one end of the connecting pipe is connected to the water tank, and the other end is connected to the water supply pipe. The side wall of the water tank is fixedly connected to a water pump 8 connected to the connecting pipe.

[0012] Furthermore, the top plate of the cleaning box is provided with two fixed plates arranged at intervals, and the side walls of the fixed plates are driven by a mechanism, and the driving mechanism is connected to a rotating roller, and the rotating roller passes through the top plate of the cleaning box and extends into the cleaning channel, and the outer periphery of the rotating roller located inside the cleaning box is wrapped with an elastic belt.

[0013] Furthermore, a push handle is provided on one side of the water tank close to the water pump 8 .

[0014] Furthermore, four pulleys are provided at the four corners of the bottom of the water tank.

[0015] Furthermore, the cleaning box includes two side panels and a top panel integrally connected to the tops of the two side panels. At least one first connection portion is provided on the upper side of the top panel, one end of the first connection portion is connected to the top panel, and the other end is fixedly connected to the lower side of the middle portion of the water pipe.

[0016] Furthermore, the water pipe is in an inverted U shape as a whole, and a hollow cavity for water flow is provided inside. The water pipe is arranged on the outside of the cleaning box, and a gap is provided between the water pipe and the outer wall of the cleaning box.

[0017] Compared with the prior art, the present invention adopts a first electromagnetic component to apply an alternating magnetic field force to the first permanent magnet component, driving the two protrusions to alternately close or release the sealing of the water hole, thereby increasing the intensity of water spraying from the inner tube. Since there is a time interval between the water spraying, the water sprayed onto the bridge guardrail has a certain time to fully soak the pollutants, thereby increasing the efficiency of cleaning the pollutants. Moreover, this intermittent spraying method can have a stronger impact on the pollutants and is easy to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention.

[0019] Figure 1 It is an overall schematic diagram of the road and bridge side guardrail cleaning device of the present invention; Figure 2 This is a rear view of the road and bridge side guardrail cleaning device of the present invention; Figure 3 It is an assembled cross-sectional view of the water pipe, inner pipe and outer pipe of the present invention; Figure 4 The present invention Figure 3 A partial enlarged view of point A in the middle; Figure 5 It is a schematic diagram of the assembly of the inner tube and the elastic member of the present invention; Figure 6 It is a schematic diagram of the assembly of the outer tube and the connecting plate of the present invention; Figure 7 It is a schematic structural diagram of the second electromagnetic component of the present invention.

[0020] Reference numerals include: Water tank 1; connecting pipe 11; push handle 12; pulley 13; Cleaning box 2; cleaning channel 21; side plate 22; top plate 23; first connecting portion 231; fixed plate 232; driving mechanism 233; rotating roller 234; elastic belt 2341; Rotating roller 3; Water pipe 4; vertical pipe 41; horizontal pipe 42; outer pipe 43; limit plate 431; second electromagnetic component 4311; Inner tube 44; partition 441; water hole 4412; support column 4413; fixed shaft 4414; arc-shaped protrusion 442; sliding portion 443; second permanent magnet 444; water inlet cavity 45; water outlet cavity 46; Rotating member 5; convex block 52; first permanent magnet 53; Connecting plate 6; first electromagnetic member 61; elastic member 7; Water pump 8. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] like Figure 1 and 2 As shown, the road bridge side guardrail cleaning device of the present invention includes a water tank 1, one side of which is fixedly connected (via welding, riveting, bolting, or other connection methods) to a cleaning box 2. The cleaning box 2 is in an inverted U-shape and has a cleaning passage 21 inside for the bridge guardrail to pass through. The outer periphery of the cleaning box 2 is provided with a water pipe 4 that is arranged around the outer periphery of the cleaning box 2. The water pipe 4 is connected to the water tank 1 and is used to transport water from the water tank 1 to the water pipe 4. The inner side of the water pipe 4 is provided with a plurality of spaced inner tubes 44. The plurality of inner tubes 44 pass through the two opposing side plates 22 of the cleaning box 2, and the inner tubes 44 located on the two side plates 22 are arranged opposite each other. The inner tubes 44 are connected to the water pipe 4 and spray water to clean both sides of the bridge guardrail passing through the cleaning passage 21.

[0023] The water tank 1 is rectangular in shape and has a hollow interior for holding water. A water transfer valve (not shown) is fixedly connected (perhaps by rotational connection or welding) to the top wall of the water tank 1 for transferring water into the hollow interior of the water tank 1. Of course, the shape of the water tank 1 may also be cylindrical, cubic, or irregular, without limitation. The water transfer valve may also be located on the side wall of the water tank 1.

[0024] like Figure 2As shown, the cleaning box 2 is a rectangular parallelepiped as a whole, which includes two side panels 22 and a top panel 23 integrally connected to the top of the two side panels 22. At least one long cylindrical first connecting portion 231 is provided on the upper side of the top panel 23, and preferably two first connecting portions 231 are provided. One end of the first connecting portion 231 is connected to the top panel 23, and the other end is fixedly connected to the lower side of the middle part of the water pipe 4 (the connection method can be welding, riveting or bolting), which is used to fix the cleaning box 2 to the water pipe 4.

[0025] like Figure 2 As shown, the water pipe 4 is overall in an inverted U shape, with a hollow cavity for water flow inside. The water pipe 4 is arranged on the outside of the cleaning box 2, and a gap is provided between the water pipe 4 and the cleaning box 2 to facilitate the installation of the water pipe 4 on the outer wall of the cleaning box 2.

[0026] like Figure 2 and 3 As shown, the water pipe 4 includes two vertical pipes 41 arranged opposite to each other, and a horizontal pipe 42 connected to the upper ends of the two vertical pipes 41. The vertical pipe 41 is provided with a plurality of spaced outer pipes 43 along its axial direction on the side facing the cleaning box 2. Preferably, 5 outer pipes 43 are provided. They are in the shape of a long cylinder, with an opening at one end and a accommodating cavity inside for accommodating the inner pipe 44 to be described below. The outer pipe 43 passes through the side plate 22 of the cleaning box. The outer pipe 43 is connected to the vertical pipe 41, and the water in the vertical pipe 41 can flow into the outer pipe 43.

[0027] like Figure 4 As shown, a long cylindrical inner tube 44 is inserted into the outer tube 43, which is open at both ends and has a hollow cavity inside for water circulation. The inner tube 44 is slidably connected to the outer tube 43 and fits tightly. The inner tube 44 slides axially relative to the outer tube 43, and water is sprayed toward the bridge guardrail through the inner tube 44 to clean the bridge guardrail.

[0028] like Figure 4 As shown, a disc-shaped partition 441 is provided in the inner tube 44, and the partition 441 divides the hollow cavity of the inner tube 44 into a water inlet cavity 45 and a water outlet cavity 46. The internal area of ​​the partition 441 is provided with two oppositely arranged water holes 4412 for connecting the water inlet cavity 45 and the water outlet cavity 46.

[0029] like Figure 4As shown, two oppositely arranged long columnar support columns 4413 are provided on the side of the partition 441 away from the water inlet cavity 45, and the two support columns 4413 are located between the two water holes 4412. The lower parts of the two support columns 4413 are fixedly connected to a fixed shaft 4414, and the fixed shaft 4414 is rotatably connected to the flat rotating member 5. A long strip-shaped protrusion with a through hole is provided in the middle of the rotating member 5, and the fixed shaft 4414 passes through the through hole to rotatably connect the support columns 4413 to the rotating member 5.

[0030] like Figure 4 As shown, the rotating member 5 is provided with two oppositely arranged disc-shaped protrusions 52 on the side facing the partition 441 . The protrusions 52 are arranged correspondingly to the water hole 4412 and matched in shape, and are used to close or release the water hole 4412 .

[0031] like Figure 4 and 6 As shown, the upper part of the two support columns 4413 is fixedly connected to the connecting plate 6, which is T-shaped as a whole. The lower side of the end of the connecting plate 6 away from the support column 4413 is fixedly connected to the first electromagnetic component 61. The first electromagnetic component 61 is provided with an electromagnetic coil connected to an external alternating power supply. The rotating component 5 is provided with a long strip of first permanent magnet 53 corresponding to the protrusion 52 on the side facing the first electromagnetic component 61. The material is permanent magnet materials such as aluminum nickel cobalt alloy, ferrite or samarium cobalt. The first electromagnetic component 61 is corresponding to the first permanent magnet 53. The electromagnetic coil of the first electromagnetic component 61 generates an alternating magnetic field, applies a magnetic field force to the first permanent magnet 53, and drives the rotating component 5 to rotate back and forth around the fixed axis 4414. The two protrusions 52 alternately close or release the water hole 4412, so that water is alternately sprayed out from the two holes to clean the bridge guardrail.

[0032] Compared with the prior art, the present invention adopts the first electromagnetic component 61 to apply an alternating magnetic field force to the first permanent magnet component 53, driving the two protrusions 52 to alternately close or release the sealing of the water hole 4412, thereby increasing the intensity of water sprayed from the inner tube 44. Since there is a time interval between the water sprays, the water sprayed onto the bridge guardrail has a certain amount of time to fully soak the pollutants, thereby increasing the efficiency of cleaning the pollutants. Moreover, this intermittent spraying method can have a stronger impact on the pollutants and is easy to clean.

[0033] like Figure 6 As shown, the inner wall of the water outlet cavity 46 of the inner tube 44 is provided with a plurality of spaced arc-shaped protrusions 442. The arc-shaped protrusions 442 have a certain inclination angle axially with the axial direction of the inner tube 44, which guides the sprayed water, so that the water is spirally sprayed from the inner tube 44 to the bridge guardrail, achieving a better cleaning effect.

[0034] like Figure 5 As shown, the inner tube 44 is provided with an annular sliding portion 443 arranged around the peripheral wall of the inner tube 44, and the sliding portion 443 is slidably matched with the inner wall of the outer tube 43. The side wall of the sliding portion 443 is provided with two arc-shaped second permanent magnets 444 arranged at intervals, and the material is a permanent magnet material such as aluminum nickel cobalt alloy, ferrite or samarium cobalt, such as Figure 7 As shown, the inner wall of the open end of the outer tube 43 is provided with an annular limiting plate 431 arranged around the opening, and the limiting plate 431 is slidably matched with the outer wall of the inner tube 44. The limiting plate 431 is provided with a second electromagnetic member 4311 on the side facing the sliding portion 443. The second electromagnetic member 4311 is correspondingly arranged with the second permanent magnet 444. The second electromagnetic member 4311 is provided with an electromagnetic coil connected to an external alternating power supply. An elastic member 7 is fixed between the sliding portion 443 and the limiting plate 431. The elastic member 7 is preferably a compression spring, a torsion spring, or a spring. Spring or leaf spring, the electromagnetic coil of the second electromagnetic component 4311 generates an alternating magnetic field, which generates a magnetic field force on the second permanent magnet 444, driving the inner tube 44 to slide back and forth axially relative to the outer tube 43, so that the water inlet cavity 45 of the inner tube 44 applies a reciprocating force to the water in the outer tube 43, so that the water in the outer tube 43 switches between a fast speed spraying mode and a slower speed spraying mode from the through hole, and then the water ejected from the inner tube 44 applies different forces to the pollutants on the bridge guardrail, which makes it easy to loosen the pollutants and increase the cleaning effect. In this way, the second electromagnetic element 4311 applies a magnetic field force in a first direction to the second permanent magnet 444, driving the inner tube 44 to move away from the second electromagnetic element 4311. The elastic element 7 stretches. When the pulling force of the elastic element 7 on the inner tube 44 equals the magnetic field force in the first direction applied by the second electromagnetic element 4311 on the second permanent magnet 444, the inner tube 44 stops moving. The second electromagnetic element 4311 changes the direction of its magnetic field, applying a magnetic field force in a second direction to the second permanent magnet 444, driving the inner tube 44 to move toward the second electromagnetic element 4311. The elastic element 7 gradually compresses. When the rebound force of the elastic element 7 on the inner tube 44 equals the magnetic field force in the second direction applied by the second electromagnetic element 4311 on the second permanent magnet 444, the inner tube 44 stops moving. It should be noted that the first direction is opposite to the second direction.

[0035] like Figure 2 As shown, a long columnar connecting pipe 11 is provided on the side of the water tank 1 facing the water pipe 4, and a hollow structure for water circulation is provided inside the water tank 1. One end of the connecting pipe 11 is connected to the water tank 1, and the other end is connected to the water pipe 4. The end of the connecting pipe 11 close to the water tank 1 is connected to a water pump 8 fixed to the side wall of the water tank 1, which is used to pump the water in the water tank 1 into the water pipe 4.

[0036] like Figure 1 As shown, the top plate 23 of the cleaning box 2 is provided with two spaced-apart fixed plates 232. A drive mechanism 233, preferably a motor, is mounted on the sidewall of the fixed plates 232. The output end of the drive mechanism 233 is connected to a rotating roller 3234, which extends through the top plate 23 of the cleaning box 2 and into the cleaning channel 21. The portion of the rotating roller 3234 located within the cleaning box 2 is wrapped around an array of elastic belts 2341. The bridge guardrail is passed between the two rotating rollers 3234. Thus, the drive mechanism 233 drives the two rotating rollers 3234 to rotate, and the elastic belts 2341 clean contaminants from both sides of the bridge guardrail.

[0037] like Figure 2 As shown, the water tank 1 is provided with a push handle 12 on one side close to the water pump 8 for the user to hold, and four pulleys 13 are provided at the four corners of the bottom of the water tank 1. The user holds the handle to push the cleaning device to move and clean the bridge guardrail.

[0038] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0041] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A road and bridge side guardrail cleaning device, characterized in that: include, Water tank (1); The water tank (1) is fixedly connected to the cleaning box (2), and a water pipe (4) communicating with the water tank (1) is provided on the outer periphery of the cleaning box (2); The water delivery pipe (4) comprises two vertical pipes (41) arranged opposite to each other, and the vertical pipes (41) are provided with a plurality of outer pipes (43) in communication with the vertical pipes (41) along their axial directions. The inner tube (44) is sleeved inside the outer tube (43), and the inner tube (44) and the outer tube (43) are slidably connected and tightly matched; A partition (441) is provided in the inner tube (44), and the partition (441) is provided with two water holes (4412) arranged opposite to each other; Two supporting columns (4413) arranged opposite to each other are provided on one side of the partition (441), the two supporting columns (4413) are located between the two water holes (4412), and the two supporting columns (4413) are rotatably connected to the rotating member (5); Two protrusions (52) are provided on one side of the rotating member (5), and the protrusions (52) are arranged correspondingly to the water holes (4412) and have matching shapes; The upper parts of the two support columns (4413) are fixedly connected to a connecting plate (6), and the connecting plate (6) is fixedly connected to a first electromagnetic component (61). The rotating component (5) is provided with a first permanent magnet component (53) corresponding to the protrusion (52). The first electromagnetic component (61) and the first permanent magnet component (53) are arranged correspondingly. The electromagnetic coil of the first electromagnetic component (61) generates an alternating magnetic field, exerts a magnetic field force on the first permanent magnet component (53), and drives the rotating component (5) to reciprocate around the fixed shaft (4414). The two protrusions (52) alternately close or release the water hole (4412).

2. The road bridge side guardrail cleaning device according to claim 1, characterized in that: The inner wall of the water outlet cavity (46) of the inner tube (44) is provided with a plurality of arc-shaped protrusions (442) arranged at intervals, and the arc-shaped protrusions (442) are arranged axially inclined with respect to the axial direction of the inner tube (44).

3. The road and bridge side guardrail cleaning device according to claim 1, characterized in that: An annular sliding portion (443) is provided on the outer periphery of the inner tube (44), the sliding portion (443) is in sliding engagement with the inner wall of the outer tube (43), two second permanent magnets (444) are provided on the side wall of the sliding portion (443), an annular limiting plate (431) is provided in the open end of the outer tube (43), the limiting plate (431) is in sliding engagement with the outer wall of the inner tube (44), the limiting plate (431) is provided with a second electromagnetic member (4311), and the second electromagnetic member (4311) and the second permanent magnet (444) are provided correspondingly.

4. The road and bridge side guardrail cleaning device according to claim 3, characterized in that: An elastic member (7) is fixedly connected between the sliding portion (443) and the limiting plate (431).

5. The road bridge side guardrail cleaning device according to claim 1, characterized in that: A connecting pipe (11) is provided on the side of the water tank (1), one end of the connecting pipe (11) is connected to the water tank (1), and the other end is connected to the water delivery pipe (4). A water pump (8) connected to the connecting pipe (11) is fixedly connected to the side wall of the water tank (1).

6. The road and bridge side guardrail cleaning device according to claim 1, characterized in that: The top plate (23) of the cleaning box (2) is provided with two fixed plates (232) arranged at intervals. The side wall of the fixed plate (232) is provided with a driving mechanism (233). The driving mechanism (233) is connected to a rotating roller (3234). The rotating roller (3234) passes through the top plate (23) of the cleaning box (2) and extends into the cleaning channel (21). The outer periphery of the portion of the rotating roller (3234) located inside the cleaning box (2) is wrapped with an elastic belt (2341).

7. The road and bridge side guardrail cleaning device according to claim 1, characterized in that: A push handle (12) is provided on one side of the water tank (1) close to the water pump (8).

8. The road and bridge side guardrail cleaning device according to claim 1, characterized in that: Four pulleys (13) are provided at the four corners of the bottom of the water tank (1).

9. The road bridge side guardrail cleaning device according to claim 1, characterized in that: The cleaning box (2) comprises two side panels (22) and a top panel (23) integrally connected to the tops of the two side panels (22). At least one first connecting portion (231) is provided on the upper side of the top panel (23). One end of the first connecting portion (231) is connected to the top panel (23), and the other end is fixedly connected to the lower side of the middle portion of the water pipe (4).

10. The road and bridge side guardrail cleaning device according to claim 1, characterized in that: The water pipe (4) is generally in an inverted U-shape, and is provided with a hollow cavity for water flow inside. The water pipe (4) is arranged outside the cleaning box (2), and a gap is provided between the water pipe (4) and the outer wall of the cleaning box (2).

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