Dust falling device for constructional engineering

Abstract

The dust falling device comprises a base, a fog gun barrel is installed above the base, a water tank is installed on one side of the base and communicates with the fog gun barrel through a pipeline, a plurality of spray heads are fixedly installed on one side of an inner cavity of the fog gun barrel, and an adjusting assembly is fixedly installed between the base and the fog gun barrel. A fan assembly is fixedly installed in an inner cavity of the fog gun barrel, a recycling assembly is installed above the water tank, the problem that water mist coalesces and falls off due to high-speed airflow of a traditional fog gun machine is solved through the recycling assembly, and a collecting plate is driven to be overturned and unfolded to form a funnel-shaped structure; the inclined flow guide face is used for receiving undiffused water mist which falls off due to disturbance of high-speed airflow of a draught fan and is close to a spraying opening of the mist gun barrel, the collected water mist is guided to return to the water tank through the collecting tray and the recycling pipe, efficient recycling of water resources which do not effectively participate in dust falling is achieved, and the water resource utilization efficiency of the device is improved. And the water resource consumption of dust falling operation of the device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dust reduction in construction, and specifically to a dust reduction device for construction projects. Background Art

[0002] The dust reduction device for construction projects is used to reduce construction dust pollution. It atomizes water through high pressure and combines with dust to settle. The covering net prevents dust from flying, which can effectively improve the construction environment, reduce the concentration of pollutants such as PM2.5, and ensure the health of construction workers and the air quality of the surrounding area.

[0003] The Chinese patent discloses a small - range dust reduction device for construction sites, with the authorization announcement number CN222173556U, which includes a bottom plate. On the top of the bottom plate, there are a water storage bucket, a lifting component, and a water pump. At the top of the lifting component, there is a liquid spraying component. The liquid spraying component includes a U - shaped seat. Inside the U - shaped seat, there is a rectangular fixed pipe rotatably connected. At the rear end of the rotating shaft of the rectangular fixed pipe, there is a worm gear. Inside the rectangular fixed pipe, there are a fan and a nozzle. This patented technology adjusts the height of the liquid spraying component through the lifting component, drives the worm gear to rotate through the worm, and the worm gear drives the rectangular fixed pipe to rotate, thereby adjusting the pitching angle of the rectangular fixed pipe. The water pump pumps out the water in the water storage bucket and transports it through a liquid delivery hose to the liquid inlet connecting pipe, and finally sprays it out from the nozzle. The fan generates air flow, quickly blows the water mist sprayed out from the nozzle out of the rectangular fixed pipe, and expands the range of the water mist, which is beneficial for small - range dust reduction on construction sites. However, this patent relies on the fan to blow air to promote the diffusion of the water mist. However, in the area near the water mist spraying port, due to the strong impact formed by the high - speed air flow generated by the fan, the water mist particles are disturbed by this, and it is difficult to maintain a stable atomization state. A large number of water droplets coalesce into large particles due to surface tension before being fully refined, and quickly fall to the periphery of the equipment under the action of gravity. As a result, a part of the water mist is lost in large quantities before it can participate in the effective dust reduction link, causing waste of water resources, greatly increasing the construction water cost, and the loss of water resources will also shorten the effective service time of the device for continuous dust reduction, weakening the coherence and overall effect of the dust reduction operation.

[0004] Therefore, the present invention provides a dust reduction device for construction projects to solve the above - mentioned problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a dust reduction device for construction projects to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A dust reduction device for construction projects includes a base. Above the base, there is a fog cannon barrel. On one side of the base, there is a water tank for storing water source, and the water tank and the fog cannon barrel are connected through a pipeline to supply water to the fog cannon barrel. On one side of the inner cavity of the fog cannon barrel, there are multiple nozzles installed, and the dust reduction function is realized by spraying water mist through the nozzles; An adjustment component is fixedly installed between the base and the fog cannon barrel, and the spraying direction can be flexibly adjusted through the adjustment component. A fan component for promoting the diffusion of water mist is fixedly installed in the inner cavity of the fog cannon barrel. A recovery component is installed above the water tank, and the water mist that has not diffused near the spray outlet of the fog cannon barrel is collected through the recovery component, and the recovered water is reused, effectively reducing water resource waste and improving the utilization efficiency of water resources.

[0007] As a further scheme of the present invention, the recovery component includes a top rod located above the water tank. Four groups of collection plates are rotatably installed on the outer part of the top rod. The bottom end of the top rod is rotatably connected to a threaded column. A moving sleeve is threadedly sleeved on the outer wall of the threaded column. A driving rod for controlling the extension of the collection plate is rotatably connected to the outer wall of the moving sleeve.

[0008] As a further scheme of the present invention, one end of the driving rod away from the moving sleeve is rotatably connected to a connecting rod. On both sides of the outer wall of each collection plate, a transmission ring is fixedly connected, and the transmission ring is rotatably sleeved on the outer wall of the connecting rod.

[0009] As a further scheme of the present invention, a collection tray is fixedly sleeved on the outer wall of the bottom end of the top rod, which is used to uniformly receive the water mist that converges and drips on the surfaces of the collection plates. The bottom end of the collection tray is rotatably sleeved on the threaded column through a bearing. A recovery pipe is fixedly connected to the bottom end of the collection tray, and the bottom end of the recovery pipe is hermetically communicated with the water tank to form a recovered water diversion channel.

[0010] As a further scheme of the present invention, the nozzle is composed of a spray pipe and a rotating pipe, and the spray pipe and the rotating pipe are rotatably connected to each other. A spiral plate and a connecting piece for guiding the flowing water to rotate are fixedly installed on the inner wall of the spray pipe. A rotating blade for providing the rotation power of the rotating pipe is ball-jointed at the center of the connecting piece.

[0011] As a further scheme of the present invention, an orifice plate for forming water mist is fixedly installed at the top end of the rotating blade, and the orifice plate is fixedly connected to the inner wall of the rotating pipe.

[0012] As a further scheme of the present invention, the fan component includes spiral guide vanes fixedly connected to the inner wall of the fog cannon barrel. A driving motor is fixedly connected to one side of the spiral guide vanes. The output end of the driving motor is fixedly connected to a central transmission shaft. One end of the central transmission shaft penetrates through the spiral guide vanes and is fixedly connected to a turbine drive impeller.

[0013] As a further solution of the present invention, the adjusting assembly includes a rotating frame located on the top surface of the base. A support column is fixedly connected to the top surface of the rotating frame, and the support column is rotatably connected to the fog cannon barrel. An electric push rod for pushing the fog cannon barrel to tilt is installed on one side of the support column, and the upper and lower ends of the electric push rod are respectively rotatably connected to the rotating frame and the fog cannon barrel.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the present invention is used, the recycling assembly solves the problem of water mist coalescence and loss caused by high-speed air flow in traditional fog cannons. The motor drives the screw column to rotate, causing the moving sleeve to displace axially and drive the collection plate to flip and unfold into a funnel-shaped structure. The inclined diversion surface is used to receive the un-diffused water mist that falls due to the high-speed air flow disturbance of the fan near the spray port of the fog cannon barrel. The silica gel soft plate between adjacent collection plates forms an elastic sealing structure to prevent water mist from overflowing. The collected water mist is guided back to the water tank through the collection tray and the recycling pipe, realizing the efficient recycling and reuse of the water resources that have not effectively participated in dust suppression, improving the water resource utilization efficiency of the device, and reducing the water resource consumption of the device's dust suppression operation.

[0015] 2. When the present invention is used, efficient operation is achieved through the spray head, the adjusting assembly, and the fan assembly. The spray head adopts a composite structure of spiral diversion and centrifugal atomization. By virtue of the built-in spiral plate to guide the water flow to form a swirl, combined with the centrifugal force of the rotating pipe, the liquid water is converted into fog droplets with high dispersion and uniform particle size, providing an ideal medium for dust suppression. The fan assembly is integrated with spiral diversion blades and a tapered horn-shaped outlet. By restricting the air flow path and optimizing the flow field distribution, the air flow is accelerated into a spiral jet with high kinetic energy, effectively improving the spraying distance and coverage range of the fog droplets, enhancing the dust suppression efficiency. Then, the adjustment mechanism adopts an electromechanical linkage design. The servo motor drives the horizontal rotation mechanism, and the electric push rod is used to flexibly adjust the spraying angle of the fog cannon barrel, which can accurately aim at the dust sources at different spatial positions during building construction, improving the coverage range of the device's dust suppression operation. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a dust suppression device for construction engineering.

[0017] Figure 2 It is a rear view of the structure of a dust suppression device for construction engineering.

[0018] Figure 3 It is a schematic structural diagram of the recycling assembly in a dust suppression device for construction engineering.

[0019] Figure 4 It is a disassembled view of the structure of the recycling assembly in a dust suppression device for construction engineering.

[0020] Figure 5It is a structural sectional view of a spray head in a dust reduction device for construction engineering.

[0021] Figure 6 It is a structural sectional view of a fan assembly in a dust reduction device for construction engineering.

[0022] Figure 7 It is a schematic structural view of an adjustment assembly in a dust reduction device for construction engineering.

[0023] Figure 8 It is a usage range diagram of a recovery assembly in a dust reduction device for construction engineering.

[0024] In the figure: 1, base; 2, fog cannon barrel; 3, water tank; 4, spray head; 401, spray pipe; 402, rotating pipe; 403, spiral plate; 404, connecting piece; 405, rotating blade; 406, orifice plate; 5, adjustment assembly; 501, rotating frame; 502, support column; 503, electric push rod; 504, rotating motor; 6, fan assembly; 601, spiral guide vane; 602, drive motor; 603, central transmission shaft; 604, turbine drive impeller; 7, recovery assembly; 701, ejector rod; 702, collection plate; 703, threaded column; 704, moving sleeve; 705, drive rod; 706, motor; 707, connecting rod; 708, transmission ring; 709, auxiliary rod; 710, collection tray; 711, recovery pipe; 712, silica gel soft plate; 713, water pump; 8, trolley; 9, fixing frame; 10, control panel; 11, support frame. Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figure 1 , Figure 2 , Figure 8 , in the embodiments of the present invention, a dust reduction device for construction engineering includes a base 1. A fog cannon barrel 2 is installed above the base 1. A water tank 3 for storing water source is installed on one side of the base 1, and the water tank 3 and the fog cannon barrel 2 are connected and communicated through a pipeline to supply water to the fog cannon barrel 2. A plurality of spray heads 4 are fixedly installed on one side of the inner cavity of the fog cannon barrel 2, and the dust reduction function is realized by spraying water mist through the spray heads 4; An adjustment component 5 is fixedly installed between the base 1 and the fog cannon barrel 2, and the spraying direction can be flexibly adjusted through the adjustment component 5 to meet different dust suppression requirements. A fan component 6 for promoting the diffusion of water mist is fixedly installed in the inner cavity of the fog cannon barrel 2. The water mist is diffused by the air supply of the fan component 6. However, during actual use, the high-speed airflow generated by the fan component 6 forms a strong impact in the area near the muzzle, resulting in the water mist particles being difficult to maintain a stable atomization state due to this disturbance. A large number of water droplets are not fully refined and coalesce into large particles due to surface tension, and quickly fall to the periphery of the equipment under the action of gravity, resulting in a large amount of water mist being lost before participating in the effective dust suppression link, causing waste of water resources (for details, please check Figure 8 ). To solve the above problems, a recovery component 7 is installed above the water tank 3, and the water mist that has not diffused near the spray port of the fog cannon barrel 2 is collected through the recovery component 7, and the recovered water is reused, effectively reducing the waste of water resources and improving the utilization efficiency of water resources; Specifically, the bottom surface of the base 1 is fixedly connected with a trolley 8 for facilitating the overall movement of the device. One side of the trolley 8 is fixedly connected with a fixing frame 9 for fixing and supporting the water tank 3, and the water tank 3 is located within the fixing frame 9. One side of the base 1 is fixedly installed with a control panel 10, which integrates functions such as start-stop buttons, spray volume adjustment, and fan speed control.

[0027] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 , the recovery component 7 includes a top rod 701. The top rod 701 is located above the water tank 3. Four groups of collecting plates 702 evenly distributed along the circumference of the top rod 701 are rotatably installed on the outside of the top rod 701. The bottom end of the top rod 701 is rotatably connected with a threaded column 703 through a bearing. A moving sleeve 704 is threadedly sleeved on the outer wall of the threaded column 703. A driving rod 705 for controlling the expansion of the collecting plate 702 is rotatably connected to the outer wall of the moving sleeve 704 through a pin shaft; Specifically, the top surface of the fixing frame 9 is fixedly connected with a support frame 11 for supporting the recovery component 7. A motor 706 for providing power is fixedly installed in the inner cavity of the support frame 11. The bottom end of the threaded column 703 passes through the support frame 11 and is fixedly connected to the output end of the motor 706; One end of the driving rod 705 away from the moving sleeve 704 is rotatably connected with a connecting rod 707 through a pin shaft. Both sides of the outer wall of each collecting plate 702 are fixedly connected with a transmission ring 708, and the transmission ring 708 is rotatably sleeved on the outer wall of the connecting rod 707; Specifically, the outer wall of the top rod 701 is rotatably connected to an auxiliary rod 709 for assisting the collection plate 702 to rotate and flip through a pin shaft. The auxiliary rod 709 and the connecting rod 707 are provided with four groups and are alternately distributed. The transmission ring 708 on one side of the outer wall of the collection plate 702 is rotatably sleeved with the connecting rod 707, and the transmission ring 708 on the other side of the outer wall of the collection plate 702 is rotatably sleeved with the auxiliary rod 709; More specifically, when the motor 706 is started, its output shaft drives the threaded column 703 to rotate, and the movable sleeve 704 is axially displaced through the threaded transmission. The movable sleeve 704 pushes the connecting rod 707 through the driving rod 705, and cooperates with the limiting effect of the auxiliary rod 709 to make the collecting plate 702 produce a synchronous flipping movement. When the collecting plate 702 is fully unfolded at the maximum angle, the four are evenly distributed at an angle of 135°, forming a funnel-shaped structure together, and its inclined guide surface can fully cover and receive the water mist falling near the spray port of the fog cannon barrel 2, thereby significantly improving the water resource recovery efficiency; The outer wall of the bottom end of the top rod 701 is fixedly sleeved with a collecting tray 710, which is used to uniformly receive the water mist gathered and dripping on the surface of each collecting plate 702, and the bottom end of the collecting tray 710 is rotatably sleeved through the bearing and the threaded column 703, and the bottom end of the collecting tray 710 is fixedly connected to a recovery pipe 711, and the bottom end of the recovery pipe 711 is sealed and connected to the water tank 3 to form a recovery water diversion channel; Specifically, a gap is reserved between the top surface of the collecting tray 710 and the collecting plate 702 to ensure that when the collecting plate 702 is turned down for storage, its edge and the collecting tray 710 do not mechanically interfere with each other, which not only meets the activity requirements of the collecting plate 702 for rotation, but also ensures that the collecting tray 710 can completely receive the recovered water mist sliding off the surface of the collecting plate 702; More specifically, a silicone soft plate 712 is fixedly installed on the adjacent side of each two adjacent groups of collecting plates 702, and the two groups of silicone soft plates 712 are arranged in an overlapping manner in the vertical direction. The silicone soft plate 712 of the upper collecting plate 702 covers the silicone soft plate 712 of the lower collecting plate 702, which has flexibility and sealing properties. After the collecting plate 702 completes the flipping and unfolding action, an elastic sealing structure is formed between the adjacent silicone soft plates 712, which can not only ensure the free rotation of the collecting plate 702, but also effectively prevent water mist from overflowing from the joint gap of the collecting plate 702, thereby realizing fully enclosed surround collection of the spray port area of the fog cannon barrel 2.

[0028] See also Figure 7 A water pump 713 is fixedly installed in the inner cavity of the base 1, and the water pump 713 is fixedly connected to the water tank 3 and the nozzle 4 through pipelines.

[0029] See also Figure 1 , Figure 5, the spray head 4 is composed of a spray pipe 401 and a rotating pipe 402, and the spray pipe 401 and the rotating pipe 402 are rotatably connected to each other. A spiral plate 403 and a connecting piece 404 for guiding the flowing water to rotate are fixedly installed on the inner wall of the spray pipe 401. A rotating blade 405 for providing the rotating power of the rotating pipe 402 is ball-jointed at the axis of the connecting piece 404; A perforated plate 406 for forming water mist is fixedly installed at the top end of the rotating blade 405, and the perforated plate 406 is fixedly connected to the inner wall of the rotating pipe 402; Specifically, a protruding block is fixedly installed on the inner wall of the rotating pipe 402, and a sliding groove for providing the rotation of the protruding block is opened on the outer wall of the spray pipe 401, and the protruding block is located in the sliding groove.

[0030] Please refer to Figure 2 , Figure 6 , the fan assembly 6 includes a spiral guide vane 601, the spiral guide vane 601 is fixedly connected to the inner wall of the fog cannon barrel 2, a driving motor 602 is fixedly connected to one side of the spiral guide vane 601, an output shaft of the driving motor 602 is fixedly connected to a central transmission shaft 603, and one end of the central transmission shaft 603 penetrates through the spiral guide vane 601 and is fixedly connected to a turbine drive impeller 604; Specifically, there are multiple spiral guide vanes 601, and an annular space formed by every two spiral guide vanes 601 and the inner wall of the barrel forms a fluid channel, which forcibly restricts the fluid path, avoids energy dispersion, and plays a role in preliminary pressure stabilization at the same time. The fog cannon barrel 2 is set to be trumpet-shaped, and the side close to the spray head 4 is set to be a narrow opening, so that the flow rate of the fluid increases sharply when passing through the narrow opening, so that the atomized water mist obtains a higher spraying speed, extends the shooting range and expands the coverage area; Please refer to Figure 1 , Figure 7 , the adjusting assembly 5 includes a rotating frame 501, the rotating frame 501 is located on the top surface of the base 1, a support column 502 is fixedly connected to the top surface of the rotating frame 501, and the support column 502 is rotatably connected to the fog cannon barrel 2 through a pin shaft. An electric push rod 503 for pushing the fog cannon barrel 2 to tilt is installed on one side of the support column 502, and both the upper and lower ends of the electric push rod 503 are rotatably connected to the rotating frame 501 and the fog cannon barrel 2 through pin shafts respectively; Specifically, a rotating motor 504 for providing the left and right rotation power of the fog cannon barrel 2 is fixedly installed in the inner cavity of the base 1, and an output shaft of the rotating motor 504 penetrates through the base 1 and is fixedly connected to the rotating frame 501.

[0031] The working principle of the present invention is: When the present invention is used, water is first stored in the water tank 3. After the water pump 713 is started, water is transported to the nozzle 4 in the inner cavity of the fog cannon barrel 2. The nozzle 4 is composed of a spray pipe 401 and a rotating pipe 402. When water flows into the spray pipe 401, the spiral plate 403 on the inner wall of the spray pipe 401 is used to guide the water flow to rotate, thereby generating rotational kinetic energy. The rotating water flow drives the ball-hinged rotating blade 405 to rotate, thereby driving the orifice plate 406 and the rotating pipe 402 to rotate synchronously. When the rotating pipe 402 rotates, the water flow is thrown out at high speed through the fine holes of the orifice plate 406, and is atomized into fine water droplets, thereby achieving preliminary dust reduction. The driving motor 602 of the fan assembly 6 drives the central transmission shaft 603 and the turbine driving impeller 604 to rotate, generating high-speed airflow. The spiral guide blades 601 constrain the airflow into a spiral shape. When the airflow passes through the trumpet-shaped narrow mouth of the fog cannon barrel 2, the airflow speed increases sharply, pushing the atomized water mist to spray far away, expanding the dust reduction coverage, allowing the water mist particles to combine with the dust in the air, increasing the weight of the dust, causing it to settle, and achieving the purpose of dust reduction; At the same time, the rotating motor 504 in the inner cavity of the base 1 is started, and its output shaft drives the rotating frame 501 to rotate, so that the fog cannon barrel 2 can achieve 360° horizontal rotation to meet the dust reduction needs in different directions. The upper and lower ends of the electric push rod 503 are respectively connected to the rotating frame 501 and the fog cannon barrel 2 through the pin shaft. When the electric push rod 503 is extended and retracted, it pushes the fog cannon barrel 2 to rotate around the pin shaft of the support column 502 to adjust the pitch angle of the spray. When spraying water mist, the high-speed airflow generated by the fan assembly 6 forms a strong impact in the area near the muzzle, causing some water mist particles to fall to the periphery of the equipment due to this disturbance, and then starting the motor 706, allowing its output shaft to drive the threaded column 703 to rotate, and the movable sleeve 704 is moved up and down along the axis through the threaded transmission. When the movable sleeve 704 moves upward, the connecting rod 707 is pushed by the driving rod 705, and the limiting effect of the auxiliary rod 709 is cooperated to make the four groups of collecting plates 702 synchronously flip outward and unfold, and finally form an angle of 135°, forming a funnel-shaped structure, covering the area below the spray port of the fog cannon barrel 2, and collecting water mist. On the contrary, when the movable sleeve 704 moves downward, the collecting plate 702 is flipped inward and stored to reduce the occupied space; Finally, the inclined surface of the unfolded collecting plate 702 is used to receive the water mist that falls near the spray port of the fog cannon barrel 2 and is not fully diffused due to air flow disturbance. The water mist gathers along the surface of the collecting plate 702 to the collecting tray 710, and the collecting tray 710 guides the recovered water back to the water tank 3 through the recovery pipe 711, thereby realizing the recycling of water resources.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dust reduction device for construction engineering, comprising a base (1), characterized in that, Above the base (1), a fog cannon barrel (2) is installed. On one side of the base (1), a water tank (3) for storing water source is installed, and the water tank (3) and the fog cannon barrel (2) are connected and communicated through a pipeline to supply water to the fog cannon barrel (2). On one side of the inner cavity of the fog cannon barrel (2), a plurality of spray nozzles (4) are fixedly installed, and the dust reduction function is realized by spraying water mist through the spray nozzles (4). An adjustment component (5) is fixedly installed between the base (1) and the fog cannon barrel (2), and the spray direction is flexibly adjusted through the adjustment component (5). A fan component (6) for promoting the diffusion of water mist is fixedly installed in the inner cavity of the fog cannon barrel (2). Above the water tank (3), a recovery component (7) is installed, and the water mist that has not diffused near the spray port of the fog cannon barrel (2) is collected through the recovery component (7), and the recycled water is reused, effectively reducing water resource waste and improving the utilization efficiency of water resources.

2. The dust reduction device for construction engineering according to claim 1, characterized in that, The recovery component (7) includes a top rod (701). The top rod (701) is located above the water tank (3). Four groups of collection plates (702) are rotatably installed on the outer part of the top rod (701). The bottom end of the top rod (701) is rotatably connected to a threaded column (703). A moving sleeve (704) is threadedly sleeved on the outer wall of the threaded column (703). A driving rod (705) for controlling the extension of the collection plate (702) is rotatably connected to the outer wall of the moving sleeve (704).

3. The dust reduction device for construction engineering according to claim 2, wherein One end of the driving rod (705) far from the moving sleeve (704) is rotatably connected to a connecting rod (707). On both sides of the outer wall of each group of collection plates (702), a transmission ring (708) is fixedly connected, and the transmission ring (708) is rotatably sleeved on the outer wall of the connecting rod (707).

4. A dust reduction device for construction projects according to claim 2, characterized in that, A collection tray (710) is fixedly sleeved on the bottom outer wall of the top rod (701) for uniformly receiving the water mist that converges and drips on the surfaces of the collection plates (702). The bottom end of the collection tray (710) is rotatably sleeved on the threaded column (703) through a bearing. A recovery pipe (711) is fixedly connected to the bottom end of the collection tray (710), and the bottom end of the recovery pipe (711) is hermetically communicated with the water tank (3) to form a recycled water diversion channel.

5. The dust reduction device for construction engineering according to claim 1, wherein The spray nozzle (4) is composed of a spray pipe (401) and a rotating pipe (402), and the spray pipe (401) and the rotating pipe (402) are rotatably connected to each other. A spiral plate (403) and a connecting piece (404) for guiding the flowing water to rotate are fixedly installed on the inner wall of the spray pipe (401). A rotating blade (405) for providing the rotation power of the rotating pipe (402) is ball-jointed at the axis of the connecting piece (404).

6. The dust reduction device for construction engineering according to claim 5, wherein, At the top end of the rotating blade (405), an orifice plate (406) for forming water mist is fixedly installed, and the orifice plate (406) is fixedly connected to the inner wall of the rotating pipe (402).

7. The dust reduction device for construction engineering according to claim 1, characterized in that, The fan assembly (6) includes a spiral guide vane (601), the spiral guide vane (601) is fixedly connected to the inner wall of the fog cannon barrel (2), a drive motor (602) is fixedly connected to one side of the spiral guide vane (601), the output end of the drive motor (602) is fixedly connected to a central drive shaft (603), and one end of the central drive shaft (603) penetrates through the spiral guide vane (601) and is fixedly connected to a turbine drive impeller (604).

8. A dust reduction device for construction engineering according to claim 1, characterized in that, The adjustment assembly (5) includes a rotating frame (501), the rotating frame (501) is located on the top surface of the base (1), a support column (502) is fixedly connected to the top surface of the rotating frame (501), and the support column (502) is rotatably connected to the fog cannon barrel (2). An electric push rod (503) for pushing the fog cannon barrel (2) to tilt is installed on one side of the support column (502), and the upper and lower ends of the electric push rod (503) are respectively rotatably connected to the rotating frame (501) and the fog cannon barrel (2).

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