A dust fall device for a construction site
By installing a combination structure of integrated base plate and airflow guide vane on the tower crane operating platform, and utilizing ultra-fine atomizing nozzles and rotatable capture plates, the problem of high-altitude dust diffusion at construction sites is solved, achieving efficient dust reduction and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YIZHENG XINCHENG CONSTR ENG CO LTD
- Filing Date
- 2025-09-08
- Publication Date
- 2026-07-31
AI Technical Summary
Existing dust suppression equipment at construction sites suffers from problems such as water waste, limited coverage, high energy consumption, high noise levels, and difficulty in effectively suppressing the spread of dust from high altitudes. In particular, in the construction of high-rise buildings, existing ground spraying or partial covering methods are difficult to effectively control the vertical spread and horizontal drift of dust in high-altitude work areas.
It adopts a combined structure of integrated base plate, keel frame, ultra-fine atomizing nozzle, airflow guide wing plate and capture plate, and is fixed by tower crane operating platform. It uses ultra-fine atomizing nozzle to spray extremely fine water mist and combined with the rotatable design of airflow guide wing plate to achieve efficient capture and control of dust diffusion in high-altitude operation area.
Without interfering with high-altitude operations, it efficiently captures and controls fine dust generated in high-altitude work areas, significantly improves air quality at construction sites, protects workers' health, has good environmental benefits and adaptability, has a wide coverage area, and reduces dust concentration.
Smart Images
Figure CN121103047B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of dust suppression equipment, and in particular to a dust suppression device for construction sites. Background Technology
[0002] Currently, the industry commonly uses equipment such as water sprinkler trucks and mist cannons for dust suppression, but these devices suffer from problems such as water waste and limited coverage. In recent years, technologies such as high-pressure spraying and negative pressure dust collection have been gradually applied to the field of construction dust suppression, but their adoption rate remains low due to limitations in equipment cost and energy consumption.
[0003] Existing technologies mainly employ three dust suppression methods: the first is traditional water truck spraying, which pressurizes water in the tank using a water pump and then atomizes it through nozzles; the second is fog cannon operation, which uses a high-pressure fan to spray water mist to a greater distance; and the third is a perimeter spray system, which involves setting up pipelines around the construction area for continuous spraying. Water trucks have the advantage of being mobile and flexible, but they have disadvantages such as high water consumption and short dust suppression duration; fog cannons have a long range but high energy consumption and noise; and perimeter spray systems provide uniform coverage but are complex to install and have high maintenance costs.
[0004] When concrete cutting, drilling, demolition, or facade construction is carried out on the top or mid-to-high floors of high-rise buildings using tower crane platforms, the resulting dust, influenced by wind at high altitudes, can easily spread to a wide surrounding area, causing pollution to nearby buildings, residents, and the environment. Existing ground spraying or partial covering methods are insufficient to effectively suppress the vertical diffusion and horizontal drift of dust at high altitudes. Summary of the Invention
[0005] This application provides a dust suppression device for construction sites, which has the advantages of efficiently capturing and controlling fine dust generated in high-altitude work areas that varies with wind direction and has a vertical diffusion trend without interfering with high-altitude operations, thereby optimizing dust suppression efficiency.
[0006] This application provides a dust suppression device for construction sites, which adopts the following technical solution: A dust suppression device for construction sites includes an integrated base plate, a frame, a water supply system, and an airflow guide vane. The integrated base plate is fixed to a tower crane operating platform via the frame. Ultra-fine atomizing nozzles are provided in the upper and lower regions of the integrated base plate. The water supply system includes a main pipe and branch pipes embedded within the frame, with the branch pipes connected to the ultra-fine atomizing nozzles. The airflow guide vane is rotatably connected to a lateral support of the frame via a drive shaft. A rotatable capturing plate is provided on the concave surface of the airflow guide vane, and the capturing plate cooperates with the concave surface to form a covering cavity. Dust-collecting fibers are provided on the inner wall of the covering cavity.
[0007] Preferably, the keel frame is formed by welding crisscrossing straight rods to form a matrix-distributed grid of mounting plates. The center of the grid of mounting plates is connected to a single plate in the integrated substrate by a snap fastener. The center of the single plate is provided with a snap fastener that matches the cross-section of the mounting plate.
[0008] Preferably, the fastener includes a claw structure adapted to the central cross intersection of the grid-shaped mounting bracket, and the claw structure is fastened to the keel frame by bolts.
[0009] Preferably, the concave surface of the airflow guide vane has a lotus petal-shaped curved surface structure, the outer surface curvature of the capture plate is adapted to the lotus petal-shaped curved surface, and one end of the capture plate is rotatably connected to the concave surface through a connecting shaft.
[0010] Preferably, the rotation angle range of the capturing plate is 0-60°, and when the capturing plate is in the closed state, its outer surface forms a continuous and smooth guide surface with the lotus petal-shaped curved surface.
[0011] Preferably, the central region of the integrated substrate is provided with two air guide strips and two symmetrically arranged air guide slots. The air guide strips are provided with first air guide ports facing both sides of the keel frame. The cross-section of the internal channel of the air guide slots is gradually narrowing and expanding along the airflow direction. The upper and lower inner walls of the air guide slots are provided with second air guide ports.
[0012] Preferably, the tapered section of the air guide groove is connected to the first air guide opening of the air guide strip, and the cross-sectional area at the junction of the tapered section and the expanding section is smaller than the cross-sectional area of the first air guide opening.
[0013] Preferably, the dust-collecting fibers covering the inner wall of the cavity have a raised, burr-like structure, and the dust-collecting fibers are made of polypropylene with triboelectric properties on their surface.
[0014] Preferably, a sealing ring is provided between the branch pipe and the ultrafine atomizing nozzle, and the sealing ring is fixed at the port of the branch pipe by compression using an elastic material.
[0015] Preferably, an electric telescopic rod is provided between the drive shaft and the airflow guide vane, one end of the electric telescopic rod is hinged to the lateral support, and the other end of the electric telescopic rod is hinged to the middle of the mounting rod.
[0016] In summary, this application has the following beneficial effects: 1. Fixed to the tower crane's operating platform via a keel frame, the ultra-fine atomizing nozzles on the upper and lower areas of the integrated base plate spray extremely fine water mist. These tiny water droplets efficiently adsorb and encapsulate airborne dust particles, increasing their weight and causing them to settle rapidly, thus significantly reducing dust concentration. Simultaneously, airflow guide vanes are rotatably connected via a drive shaft. The inner wall of the encapsulation cavity formed by the concave surface of the vanes and the capturing plates is lined with dust-collecting fibers, which guide and physically adsorb fine particles that cannot be captured by the water mist, achieving secondary capture. Its advantages lie in its highly efficient synergy, combining wet and dry dust suppression for a more comprehensive effect; utilizing the high position of the tower crane to achieve wide-area coverage; significantly improving air quality at construction sites, protecting worker health, and providing good environmental benefits; and the rotatable design of the airflow guide vanes allows for adjustment according to wind direction or dust source, making it highly adaptable and optimizing dust suppression efficiency.
[0017] 2. By mounting and dismounting the dust suppression device onto the tower crane operating platform using fasteners, and with the synergistic effect of the airflow guide vanes and ultra-fine atomizing nozzles, the device efficiently captures and controls fine dust generated in the high-altitude work area that varies with wind direction and has a vertical diffusion trend, without relying on ground equipment or interfering with high-altitude operations, thus preventing its large-scale diffusion.
[0018] 3. By utilizing the inflation device, the interiors of both the first and second air inlets are under positive pressure. This causes dust particles to suspend in the central area of the front side of the integrated substrate after absorbing water droplets and move towards the airflow guide vane. This is used to concentrate and guide the dust particles, preventing them from floating in an uncontrollable direction.
[0019] 4. Rotatable capture plates are evenly distributed inside the airflow guide vane. These capture plates not only capture particulate dust, but also effectively reduce wind resistance through reverse drive. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of the dust suppression device in this embodiment; Figure 2 This is a schematic diagram of the internal structure of the fastener in this embodiment; Figure 3 This is an exploded view of the structure between the integrated substrate and the keel frame in this embodiment; Figure 4 This is a schematic diagram of the positional relationship between the air guide strip and the air guide groove in this embodiment; Figure 5 This is a schematic diagram of the connection structure between the airflow guide vane and the capture plate in this embodiment; Figure 6 This is a schematic diagram of the overall structure of the airflow guide vane in this embodiment, with the vane rotated 180° on the integrated substrate. Explanation of reference numerals in the attached drawings: 1. Integrated substrate; 101. Single board; 102. Fastener; 2. Airflow guide vane; 3. Fixing component; 301. Frame; 302. Angle steel; 4. Mounting hole; 5. Ultra-fine atomizing nozzle; 6. Water supply pipe; 7. Main pipe; 8. Branch pipe; 9. Lateral support; 10. Drive shaft; 11. Electric telescopic rod; 12. Mounting rod; 13. Air guide strip; 14. Air guide groove; 15. Capturing plate; 16. Connecting shaft. Detailed Implementation
[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0022] Example: This invention discloses a dust suppression device for construction sites, such as... Figure 1 As shown, it includes an integrated base plate 1 and an airflow guide vane 2. The integrated base plate 1 is provided with a fixing member 3, and the integrated base plate 1 is installed and fixed to the tower crane operating platform for high-altitude operations through the fixing member 3.
[0023] like Figure 2 As shown, specifically, the fixing component 3 includes a keel frame 301, on the back of which three sets of L-shaped angle steel 302 are horizontally welded. During installation, these L-shaped angle steel 302 are designed to precisely engage or hook into the edge or specific structure of the tower crane operating platform, thereby achieving initial positioning and support. This engaging method provides a quick and relatively stable initial fixing point.
[0024] like Figure 2 As shown, after the angle steel 302 is initially snapped in place, the entire keel frame 301 and its integrated base plate 1 can be fine-tuned to achieve the optimal installation position. This adjustment capability ensures that the device can adapt to any slight differences that may exist in the tower crane platform and accurately align with the preset installation point.
[0025] like Figure 2 As shown, once the keel frame 301 is adjusted to the appropriate position, it is operated by the locking screws set inside the L-shaped angle steel 302. When these screws are tightened, they apply pressure to the tower crane operating platform, forming a strong clamping force, thereby firmly fixing the keel frame 301 to the platform and preventing it from shifting or loosening due to vibration, wind, or tower crane movement in the high-altitude working environment.
[0026] like Figure 2As shown, the dust suppression device is installed on the tower crane's operating platform, taking advantage of the tower crane's height. Spraying water mist or other dust suppression media from a height can cover a larger construction area, allowing water mist particles to remain in the air for a longer time, more effectively adsorbing and settling airborne dust, and improving dust suppression efficiency.
[0027] like Figure 2 As shown, the keel frame 301 is welded from crisscrossing straight bars, forming several grid-like installation grids arranged in a matrix. These crisscrossing bars create a truss or lattice structure. This structure distributes the stress across the individual bars, significantly reducing its weight while maintaining high strength and stiffness. Compared to a solid plate or scattered support bars, this grid design more effectively utilizes the material's mechanical properties. When external loads are applied, the force is evenly distributed across the intersections and bars, preventing stress concentration at any single point and thus improving the overall stability and resistance to deformation of the structure.
[0028] like Figure 2 and Figure 3 As shown, the integrated substrate 1 includes a single plate 101 that matches the cross-section of the inner ring of the mounting grid. A snap-fit element 102 is provided at the center of the single plate 101. The snap-fit element 102 is interlocked with the center cross of the grid and is fixedly installed in the mounting grid by bolts. The snap-fit element 102 is located at the center of the single plate 101 and is interlocked with the center cross of the grid. This provides a precise positioning mechanism, ensuring that the single plate 101 can quickly and accurately find its center position and automatically align when placed in the mounting grid, avoiding the tediousness and errors of manual alignment. The snap-fit connection provides temporary fixation before the bolts are tightened, preventing the single plate 101 from easily shaking or falling off during installation, freeing the installer's hands and facilitating subsequent bolt fixing operations.
[0029] like Figure 2 and Figure 3 As shown, an upper region, a middle region and a lower region are formed on the front side of the integrated substrate 1. Several rows of mounting holes 4 are provided in the upper region and the lower region of the integrated substrate 1. An ultra-fine atomizing nozzle 5 is provided inside the mounting holes 4 of the integrated substrate 1.
[0030] like Figure 2 and Figure 3As shown, the ultrafine atomizing nozzle 5 decomposes water into extremely small droplets, forming a high-density water mist. These tiny droplets diffuse in the air, and due to surface tension, van der Waals forces, and electrostatic interactions, they collide, adsorb, and combine with airborne dust particles. Especially for fine particles such as PM2.5 and PM10, the ultrafine water mist can capture them more effectively. The design of the upper and lower regions of the integrated substrate 1, as well as multiple mounting holes 4, ensures that the atomization area can cover a wider space, forming a three-dimensional water mist barrier and improving dust suppression efficiency.
[0031] like Figure 2 and Figure 3 As shown, the ultrafine atomizing nozzle 5 is equipped with a multi-angle adjustable structure. By using the wind speed sensor and wind direction sensor data on the front of the integrated substrate 1, the spray direction and intensity are intelligently adjusted to form a physical barrier against convective dust.
[0032] like Figure 2 and Figure 3 As shown, the wind speed sensor monitors the speed of airflow in real time, while the wind direction sensor determines the specific direction of airflow, providing real-time environmental information. This real-time wind speed and direction data is received and processed by the control system within the integrated substrate 1. It analyzes the most likely path and speed of dust diffusion based on a preset algorithm. Based on the analysis results, the system immediately instructs the multi-angle adjustable ultra-fine atomizing nozzle 5 to adjust its spray direction to the optimal position. For example, if the wind is blowing from a certain direction, the system intelligently adjusts the spray direction to be against the wind or perpendicular to the wind direction, so as to form a dense atomized "wall" or "curtain" along the dust diffusion path.
[0033] like Figure 2 and Figure 3 As shown, the system also adjusts the spray intensity according to the wind speed. At higher wind speeds, a higher spray intensity may be needed to ensure the atomized barrier is not easily dispersed by the wind, thus maintaining its dust collection efficiency.
[0034] like Figure 2 and Figure 3 As shown, through the aforementioned intelligent and dynamic adjustments, the system can continuously generate a physical barrier composed of ultrafine water mist in the air convection region. When the airflow carrying dust passes through this barrier, the dust particles collide with, combine with, and are captured by the high-density ultrafine water droplets, eventually settling due to increased weight, thus effectively preventing the spread of dust.
[0035] like Figure 2 and Figure 3As shown, traditional fixed spray systems may not be able to effectively cope with changes in wind direction and speed, while intelligent adjustment systems can actively track and intercept dust that is spread by the wind, greatly improving dust suppression efficiency, especially in open or windy environments.
[0036] like Figure 2 and Figure 3 As shown, by precisely constructing a fogging barrier at the dust source or along its diffusion path, it is possible to effectively prevent dust from spreading to a wider area, thereby better protecting the surrounding environment and human health.
[0037] like Figure 2 and Figure 3 As shown, the keel frame 301 has several horizontally distributed water supply pipes 6 inside, and a vertically distributed main pipe 7 is pre-embedded inside the keel frame 301. The several rows of water supply pipes 6 are interconnected with the main pipe 7. The water supply pipes 6 have several branch pipes 8 connected to the ultra-fine atomizing nozzles 5 inside. The input end of the main pipe 7 is connected to the water storage tank set on the tower crane operating platform through a water pump. The main pipe 7 is the main water supply artery of the entire spray system. The vertically distributed main pipe 7 is responsible for receiving and transporting a large amount of water from the water source. These horizontally distributed water supply pipes 6 are interconnected with the main pipe 7. They are secondary distribution pipes responsible for distributing the water flow from the main pipe 7 to specific heights or areas to ensure that each spray unit can obtain sufficient water pressure and water volume.
[0038] like Figure 2 and Figure 3 As shown, the water supply pipes 6 extend directly from the inside of the branch pipes 8 and connect directly to each ultra-fine atomizing nozzle 5. These branch pipes 8 are the smallest distribution units, precisely directing the water flow to each individual ultra-fine atomizing nozzle 5, ensuring that each ultra-fine atomizing nozzle 5 can spray independently.
[0039] like Figure 2 and Figure 3 As shown, the function of the keel frame 301 is to provide robust physical support and protection for the entire water system. By pre-embedding or fixing the main pipe 7 and water supply pipe 6 inside the keel frame 301, damage and deformation of the pipes can be effectively prevented, while making the entire system structure more compact and neat.
[0040] like Figure 2 and Figure 3 As shown, the branch pipe 8 and the ultra-fine atomizing nozzle 5 are sealed together by a sealing ring. This is crucial because the ultra-fine atomizing nozzle 5 typically needs to operate at high pressure to produce an extremely fine water mist. The sealing ring effectively prevents high-pressure water leakage, ensures stable water pressure transmission to the nozzle, thereby maintaining the spray effect and extending the system's service life.
[0041] like Figure 3 and Figure 4As shown, lateral support columns 9 are fixedly installed on both the left and right sides of the keel frame 301. A drive shaft 10 is provided on the lateral support column 9. The drive shaft 10 is connected to a mounting rod 12 for connecting the airflow guide vane 2. Specifically, an electric telescopic rod 11 is provided on the lateral support column 9. One end of the electric telescopic rod 11 is hinged to the lateral support column 9, and the other end of the electric telescopic rod 11 is hinged to the middle of the mounting rod 12. By extending and retracting the electric telescopic rod 11, the airflow guide vane 2 rotates around the central axis of the drive shaft 10 through the mounting rod 12. Therefore, the angle of the airflow guide vane 2 on both sides of the keel frame 301 is changed.
[0042] like Figure 3 and Figure 4 As shown, two air guide strips 13 are provided at the center of the front center area of the integrated substrate 1. The air guide strips 13 have a first air guide port inside, and the first air guide ports of the two air guide strips 13 face the two sides of the keel frame 301 respectively.
[0043] like Figure 4 As shown, firstly, high-density ultrafine water droplets collide and combine with dust particles in the air. After absorbing the water droplets, the dust particles increase in weight, lose their levitation ability, and eventually settle to the central area of the front side of the integrated substrate 1. Once the dust particles settle onto the integrated substrate 1, they pass through the first air guides inside the air guide strips 13 on the integrated substrate 1, which face both sides of the keel frame 301. These first air guides generate airflow guidance, moving the captured dust particles along the direction of the airflow guide vanes 2.
[0044] like Figure 4 As shown, two air guide grooves 14 are symmetrically arranged about the air guide strip 13 on the central area of the front side of the integrated substrate 1. The internal channel cross-section of the air guide groove 14 changes uniformly and forms a narrowing end and an expanding end at its two ends. The narrowing end of the air guide groove 14 faces the first air guide port of the air guide strip 13, and its function is to accelerate the airflow, which may generate local high pressure or guide stronger airflow, thereby effectively sucking in or blowing the settled dust particles from the first air guide port area into the air guide groove 14. This is similar to the Venturi effect, increasing the flow rate to better transport particles.
[0045] like Figure 4 As shown, the enlarged end of the air guide slot 14 faces the airflow guide vane 2; its function is to slow down the airflow and provide a wider outlet area, so that the accelerated dust particles can enter the capture range of the airflow guide vane 2 more smoothly and dispersedly.
[0046] like Figure 4As shown, the upper and lower inner walls of the air guide groove 14 are provided with second air guide ports. The second air guide ports are provided to suspend and guide dust particles to the center position of the front center area of the integrated substrate 1.
[0047] like Figure 5 As shown, specifically, the airflow guide vane 2 has a concave center forming a lotus petal-shaped concave surface. This lotus petal-shaped concave surface has a specific curvature and structure, which can effectively guide the airflow containing dust particles. This shape allows the airflow to change direction when entering the concave region and be guided into the encapsulation cavity described below. Rotatable capturing plates 15 are uniformly arranged on the concave surface of the airflow guide vane 2. The center of the capturing plates 15 is concave in the opposite direction and forms an encapsulation cavity for capturing dust particles with the concave surface of the airflow guide vane 2. When the airflow enters these concave surfaces, its velocity is slowed down due to the expansion of space or the guiding effect. The airflow deceleration helps dust particles to separate from the airflow due to inertia or gravity, making them easier to capture. At the same time, this special shape may help to form local vortices or low-pressure areas, causing dust particles to accumulate in these areas.
[0048] like Figure 5 As shown, the center of the capturing plate 15 is concave inwards, forming a relatively closed encapsulation cavity when it combines with the concave surface of the airflow guide vane 2. When dust particles enter or are adsorbed onto the surface of the capturing plate 15 by inertia, the rotating capturing plate 15 carries them into this encapsulation cavity. Once inside the cavity, the dust particles are relatively locked in, effectively preventing them from being re-entrained by the airflow and ensuring a high collection efficiency. This cavity provides a low-speed or stationary space, which is conducive to the stable retention of dust.
[0049] like Figure 5 As shown, the inner wall of the enclosure cavity of the capturing plate 15 is uniformly distributed with dust-collecting fibers that have a raised, burr-like structure for dust collection. The dust-collecting fibers are made of polypropylene. When dust particles in the airflow carry an electric charge, or when the dust-collecting fibers themselves carry an electrostatic charge, opposite charges will attract each other. Even neutral dust particles may be attracted by induction when they approach charged fibers. This electrostatic effect is particularly effective for capturing fine particles because fine particles are lightweight, have little inertial effect, but are more susceptible to the influence of electric field forces.
[0050] like Figure 5 As shown, polypropylene fiber material will naturally become charged by friction when it rubs against airflow or dust, thus pre-charging the dust-collecting fibers.
[0051] like Figure 5As shown, when the dust-laden airflow enters the encapsulation cavity, the airflow velocity slows down, and the dust particles move within the airflow. The raised dust-collecting fibers increase the effective surface area of the capturing plate 15 and form a dense barrier network. During their movement, dust particles physically collide with these fibers and adhere to the surface of the dust-collecting fibers due to van der Waals forces, capillary forces, or mechanical interlocking.
[0052] like Figure 5 As shown, the raised structure of the dust-collecting fibers allows them to extend more effectively into the airflow, increasing the chance of collision with dust particles.
[0053] like Figure 5 As shown, dust-collecting fibers, by combining electrostatic adsorption and physical interception, can more effectively capture dust of various particle sizes, especially ultrafine particles such as PM2.5, which is difficult to achieve with traditional mechanical filtration.
[0054] like Figure 5 As shown, once the dust is captured and adsorbed by the dust collection fiber, it will adhere firmly to the fiber surface. Even if the capture plate 15 rotates or the airflow fluctuates, it can effectively prevent the captured dust from escaping again, ensuring the purification effect of the system.
[0055] like Figure 5 As shown, one end of the capturing plate 15 rotates on the concave surface of the airflow guide vane 2 via the connecting shaft 16, and the rotation angle range of the capturing plate 15 is 0-60°.
[0056] like Figure 5 As shown, when the airflow direction aligns with the design streamlines of the capture plate 15, the airflow will flow smoothly on the outer surface of the capture plate 15. At this time, the torque generated by the airflow will push the capture plate 15 into contact with the concave surface of the airflow guide vane 2. This contact allows the capture plate 15 and the vane to form a continuous, smooth curved surface, minimizing turbulence and frontal area, thereby reducing wind resistance. This is intended to reduce air resistance.
[0057] like Figure 5 As shown, when the airflow direction is opposite to the design streamline of the capture plate 15, the airflow will directly impact the capture plate 15, generating an outward pushing force on its surface. This torque will overcome the resistance when closed, causing the capture plate 15 to rotate outward around the connecting shaft 16, thereby opening. As the capture plate 15 opens, the encapsulation cavity below it will be exposed.
[0058] like Figure 5As shown, the key point is that the intensity of the airflow is directly proportional to the opening angle of the capturing plate 15: the greater the airflow, the greater the force applied to the capturing plate 15, the greater the angle at which the capturing plate 15 is pushed open, and the larger the exposed area of the encapsulation cavity. This exposure of the encapsulation cavity allows the device to capture or guide more reverse airflow into the cavity. like Figure 5 As shown, this system requires no external energy source or complex control system, relying entirely on the power and direction of airflow to automatically adjust its operating state—"closed or open." This greatly simplifies the structure, reduces the failure rate, and provides a fast response time.
[0059] Working principle: Before use, the user first installs and fixes the integrated base plate 1 to the tower crane operating platform for high-altitude operations using the fastener 3.
[0060] The single board 101 on the integrated base plate 1 is installed in the center of the grid-shaped mounting grid according to the specifications using the snap fastener 102, and the main pipe 7 is connected to the water storage tank set on the tower crane operating platform via a water pump. The air guide strip 13 and the air guide duct in the air guide slot 14 are connected to the air inflation device set on the tower crane operating platform.
[0061] Using data from wind speed and direction sensors, the spray direction and intensity of the ultrafine atomizing nozzle 5 are intelligently adjusted to form a physical barrier against convective dust. High-density ultrafine water droplets collide and combine with dust particles in the air. After absorbing water droplets, the dust particles increase in weight, lose their levitation ability, and eventually settle to the central area of the front side of the integrated substrate 1.
[0062] Then, using the inflation device, both the first and second air inlets are under positive pressure. This causes dust particles, after absorbing water droplets, to suspend in the central area of the front surface of the integrated substrate 1 and move towards the airflow guide vane 2. The airflow direction is opposite to the design streamline of the capturing plate 15 on the airflow guide vane 2, and the airflow directly impacts the capturing plate 15, generating an outward pushing force on its surface. This torque overcomes the resistance during closure, causing the capturing plate 15 to rotate outward around the connecting shaft 16, thus opening. As the capturing plate 15 opens, the encapsulation cavity beneath it is exposed. When the dust-containing airflow enters the encapsulation cavity, the airflow speed slows down, and the dust particles move within the airflow. The raised dust-collecting fibers increase the effective surface area of the capturing plate 15 and form a dense barrier network. During movement, dust particles physically collide with these fibers and adhere to the surface of the dust-collecting fibers due to van der Waals forces, capillary forces, or mechanical interlocking.
[0063] like Figure 6As shown, when the wind pressure in the air is too high during high-altitude operations, the drive motor on the mounting rod 12 is activated, causing the airflow guide vane 2 connected to the output end of the drive motor to rotate 180°. At this time, the airflow direction is consistent with the design streamline of the capturing plate 15, and the airflow will form a smooth flow on the outer surface of the capturing plate 15. At this time, the torque generated by the airflow will push the capturing plate 15 into a state of contact with the concave surface of the airflow guide vane 2. This contact makes the capturing plate 15 and the vane form a continuous and smooth curved surface, minimizing turbulence and windward area, thereby reducing wind resistance. This is intended to reduce air resistance.
[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A dust faller for a construction site, characterized in that The system includes an integrated base plate (1), a frame (301), a water supply system, and an airflow guide vane (2). The integrated base plate (1) is fixed to the tower crane operating platform via the frame (301). The upper and lower regions of the integrated base plate (1) are provided with ultra-fine atomizing nozzles (5). The water supply system includes a main pipe (7) and branch pipes (8) pre-embedded in the frame (301). The branch pipes (8) are respectively connected to the ultra-fine atomizing nozzles (5). The airflow guide vane (2) is rotatably connected to the lateral support (9) of the frame (301) via a drive shaft (10). A rotatable capturing plate (15) is provided on the concave surface of the airflow guide vane (2). The capturing plate (15) cooperates with the concave surface to form a covering cavity. The inner wall of the covering cavity is provided with dust collection fibers.
2. The dust fall device according to claim 1, characterized in that The keel frame (301) is formed by welding crisscrossing straight rods to form a matrix-distributed grid of installation grids. The center of the grid of installation grids is connected to a single plate (101) in the integrated base plate (1) by a snap fastener. The center of the single plate (101) is provided with a snap fastener (102) that matches the cross section of the installation grid.
3. The dust suppression device according to claim 2, characterized in that, The fastener (102) includes a claw structure adapted to the central cross intersection of the grid, and the claw structure is fastened to the keel frame (301) by bolts.
4. The dust fall device of claim 1, wherein The concave surface of the airflow guide vane (2) has a lotus petal-shaped curved surface structure. The outer surface curvature of the capture plate (15) is adapted to the lotus petal-shaped curved surface. One end of the capture plate (15) is rotatably connected to the concave surface through the connecting shaft (16).
5. The dust fall device according to claim 4, characterized in that The rotation angle range of the capture plate (15) is 0-60°. When the capture plate (15) is in the closed state, its outer surface forms a continuous and smooth guide surface with the lotus petal-shaped curved surface.
6. The dust fall device of claim 1, wherein The integrated substrate (1) has two air guide strips (13) and two symmetrically arranged air guide grooves (14) in the middle area. The air guide strips (13) have first air guide ports facing both sides of the keel frame (301). The cross section of the air guide groove (14) has a gradually narrowing and expanding structure along the airflow direction. The upper and lower inner walls of the air guide groove (14) have second air guide ports.
7. The dust suppression device according to claim 6, characterized in that, The tapering section of the air guide groove (14) is connected to the first air guide port of the air guide strip (13), and the cross-sectional area at the junction of the tapering section and the expanding section is smaller than the cross-sectional area of the first air guide port.
8. The dust fall device of claim 1, wherein, The dust-collecting fibers covering the inner wall of the cavity have a raised, burr-like structure, and the dust-collecting fibers are made of polypropylene with triboelectric properties on their surface.
9. The dust fall device of claim 1, wherein, A sealing ring is provided between the branch pipe (8) and the ultrafine atomizing nozzle (5), and the sealing ring is fixed at the port of the branch pipe (8) by extrusion of elastic material.
10. The dust fall device of claim 1, wherein, The drive shaft (10) is connected to an mounting rod (12) for connecting the airflow guide vane (2). Specifically, an electric telescopic rod (11) is provided on the side support (9). One end of the electric telescopic rod (11) is hinged to the side support (9), and the other end of the electric telescopic rod (11) is hinged to the middle of the mounting rod (12).