A fixed type mist column rotatable dust falling device for house building construction site

Abstract

The utility model provides a kind of house building construction site fixed fog stake rotatable dust-settling device, including fog stake main body, water supply system, control system and waste water circulation system;The fog stake main body includes column and at least one layer of spray unit installed on the column;The water supply system includes raw water tank, water treatment device, high-pressure pump and the spray unit connected by pipeline in turn;The control system includes controller, dust sensor electrically connected with the controller and the positioning receiving module for monitoring the position of construction equipment;The controller is electrically connected with the high-pressure pump and the spray unit, for dynamically adjusting water pressure and spray range according to dust concentration and dust source position information.The utility model constitutes a set of efficient energy-saving, intelligent safety, green environmental protection construction site dust-settling solution, solves the problem of poor effect, serious waste, single function etc. of traditional dust-settling mode.

Description

Technical Field

[0001] This utility model relates to a fixed, rotatable fog pile dust suppression device for building construction sites. Background Technology

[0002] Construction sites generate significant amounts of dust during processes such as pile foundation work, earthwork excavation, material handling, and concrete pouring. This dust severely pollutes the air, harms the health of workers and nearby residents, affects the normal operation of machinery, and contradicts modern green construction principles. Therefore, developing efficient and intelligent dust control technologies has become an urgent need for the sustainable development of the construction industry.

[0003] Currently, while common dust suppression methods on the market have some effect, they suffer from many inherent defects and fail to meet the requirements of modern high-standard construction: traditional fixed dust suppression facilities are functionally limited and lack a high degree of intelligence. Existing systems such as perimeter sprinklers and tower crane sprinklers typically only have simple timed start / stop or manual control functions. Their nozzle angles, coverage areas, and water pressures are all fixed and cannot be dynamically adjusted according to the real-time location and diffusion of dust sources, resulting in numerous blind spots in dust suppression and serious waste of water resources. Most dust suppression solutions only focus on the "spraying" itself, neglecting crucial issues such as water recycling, energy consumption control, installation adaptability, and operational safety. For example, allowing sprayed wastewater to flow freely not only wastes water resources but may also lead to mud formation on the construction site. Utility Model Content

[0004] This utility model provides a fixed, rotatable fog pile dust suppression device for building construction sites, which can effectively solve the above-mentioned problems.

[0005] This utility model is implemented as follows: A fixed, rotatable mist pile dust suppression device for building construction sites includes a mist pile body, a water supply system, a control system, and a wastewater recycling system. The fog pile body includes a column and at least one layer of spraying units installed on the column; The water supply system includes a raw water tank, a water treatment device, a high-pressure pump, and the spray unit, which are connected in sequence through pipelines. The control system includes a controller, a dust sensor electrically connected to the controller, and a positioning receiving module for monitoring the position of the construction equipment; the controller is electrically connected to the high-pressure pump and the spray unit, and is used to dynamically adjust the water pressure and spray range according to the dust concentration and dust source location information; The wastewater recycling system includes a collection ditch, a sedimentation tank, and a recycled water tank, with the outlet of the recycled water tank connected to the inlet of the raw water tank.

[0006] The beneficial effects of this utility model are: (1) This utility model uses a dust sensor and a positioning receiving module to control a high-pressure pump and a rotatable spray unit to achieve automatic tracking and precise dust suppression of moving dust sources, effectively eliminating dust suppression blind spots and saving water significantly. At the same time, the integrated wastewater recycling system recycles and treats the wastewater after spraying and reuses it, forming a closed-loop utilization of water resources and significantly improving the utilization rate of water resources. In addition, its environmental adaptive adjustment and obstacle avoidance safety functions together constitute a set of efficient, energy-saving, intelligent, safe and green environmental protection construction site dust suppression solutions, solving the problems of poor effect, serious waste and single function of traditional dust suppression methods. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is the front view of this utility model.

[0009] Figure 2 This is a system module block diagram of this utility model.

[0010] Figure 3 This is a flowchart of the wastewater recycling system of this utility model.

[0011] Figure 4 This is a flowchart of the intelligent dust suppression method using fixed fog piles at building construction sites, which is based on this utility model.

[0012] Figure 5 This is a functional module block diagram of the intelligent dust suppression system of this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0014] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0015] Reference Figure 1-3 As shown, a fixed rotating fog pile dust suppression device for building construction sites includes a fog pile body 1, a water supply system 2, a control system 3, and a wastewater recycling system. The fog pile body 1 includes a column 11 and at least one layer of spraying units 12 installed on the column 11; The water supply system 2 includes a raw water tank 21, a water treatment device 22, a high-pressure pump (a variable frequency vertical multi-stage centrifugal pump with an adjustable rated pressure of 0-10MPa, a motor power of 5.5kW, and stepless speed regulation via the analog output module (0-10V) of the PLC) and a spray unit 12, all connected in sequence via pipelines. The control system 3 includes a controller, a dust sensor electrically connected to the controller, and a positioning receiving module for monitoring the position of the construction equipment. The controller is electrically connected to the high-pressure pump and the spray unit 12 and is used to dynamically adjust the water pressure and spray range according to the dust concentration and dust source location information.

[0016] The spray unit 12 is a multi-layer annular nozzle array. Each layer of the spray unit 12 is independently connected to a servo motor. The servo motor (Panasonic MINAS A6 series AC servo motor) is electrically connected to the controller. In this way, it receives the signal from the positioning receiving module and controls the servo motor to drive the spray unit to rotate horizontally and adjust the pitch angle towards the dust source.

[0017] The column 11 is a segmented telescopic structure made of corrosion-resistant composite material. It is hollow inside and has pipes and cables laid on it. The bottom of the column 11 is equipped with two interchangeable mounting bases: a pre-embedded foundation and a quick-install counterweight base.

[0018] Specifically, the telescopic structure includes a bottom fixed section, a middle telescopic section, and a top mounting section. These sections are nested, with the middle telescopic section sliding within the bottom fixed section and secured and adjustable at preset height holes using high-strength stainless steel pins (not shown in the figure) or electro-hydraulic push rods (not shown in the figure). This telescopic structure allows for flexible adjustment of the spray unit 12's operating height based on dust levels at different construction stages (e.g., earthwork excavation, structural construction), optimizing dust suppression. Furthermore, when not in operation, the column 11 can be retracted to its lowest height (e.g., 4 meters), significantly reducing space requirements and facilitating transportation and storage in confined construction sites. The retracted position also prevents interference with tall equipment (e.g., crane booms) on site.

[0019] Furthermore, the inner wall of the column 11 is prefabricated with cable trays and pipe clamps to fix the pipes and cables. In addition, the pipes and cables are fixed on both sides of the cavity to achieve dry and wet separation, so as to avoid affecting electrical safety when the pipes condense or leak. At the same time, signal cables (such as sensor and servo motor cables) are laid in a dedicated cable tray with a cover plate to isolate them from power cables and effectively prevent electromagnetic interference.

[0020] Furthermore, the pre-embedded foundation (for long-term fixation) includes a pre-cast reinforced concrete base and a set of high-strength pull-out bolts embedded in the concrete. The concrete base is typically 1.5m x 1.5m x 1.0m (length x width x depth) and is equipped with a steel reinforcement cage. The upper end of the pull-out bolt set protrudes from the concrete surface, and its thread specifications are perfectly matched with the bolt holes of the bottom flange of column 11. The overall structure has excellent stability and can resist strong wind loads. It is suitable for long-term fixed construction sites with a construction period of more than one year, such as the main entrance of the project and fixed mixing plants.

[0021] Furthermore, the quick-install counterweight base (for temporary or rapid deployment) includes a precast reinforced concrete counterweight plate and multiple chemical anchors. The counterweight plate is a square precast component with a pre-drilled flange interface in the center to match the bottom of the column. During deployment, simply place the counterweight plate on a flat, hardened surface, secure it to the ground using chemical anchors through the pre-drilled holes on its edge, and then bolt the flange at the bottom of the column 11 to the flange on the counterweight plate. This allows the entire system to be easily moved to a new work site using a forklift or crane, depending on changes in the dust source.

[0022] The high-pressure pump includes a water softening device and a precision filter connected in sequence. The water softening device removes calcium and magnesium ions from the water, reducing water hardness and preventing scale formation in the high-pressure pump, pipelines, and nozzles. The precision filter, connected after the softening device, deeply filters residual suspended solids, particulate matter, rust, and other minute impurities from the water, thereby ensuring the stability of the spray unit 12 and preventing nozzle clogging.

[0023] The wastewater recycling system includes a collection ditch, a sedimentation tank, and a recycled water tank. The outlet of the recycled water tank is connected to the inlet of the raw water tank. The wastewater recycling system also includes a multi-stage filtration device and a disinfection device installed between the sedimentation tank and the recycled water tank. The outlet of the recycled water tank is connected to the inlet of the raw water tank 21 through a recycled water pump.

[0024] The multi-stage filtration system consists of three stages: the first stage is a stainless steel wedge-shaped wire mesh filter with a filtration accuracy of 100μm, used to intercept large particles; the second stage is a quartz sand pressure filter with a filtration accuracy of 20μm; and the third stage is a bag-type precision filter with a filtration accuracy of 5μm. This allows for precise filtration of wastewater. Simultaneously, the disinfection device is a low-pressure, high-intensity ultraviolet disinfector. Its 254nm wavelength UV-C ultraviolet light can kill 99.9% of bacteria and viruses in the water, preventing biofilm formation. After this process, the filtered water can be reused in the spray system for recycling.

[0025] The control system 3 also includes an anemometer and a soil moisture sensor that are electrically connected to the controller; the controller further optimizes the spray angle of the spray unit 12 based on the wind speed and direction information, and suppresses spraying based on the soil moisture information to prevent the ground from becoming muddy.

[0026] It also includes an obstacle avoidance safety system, which includes a lidar sensor and an audible and visual alarm. The lidar sensor is fixedly installed on the top of the column 11, and its signal output terminal is electrically connected to the signal input terminal of the controller. The audible and visual alarm is electrically connected to the electrical output terminal of the controller. When an obstacle is detected to have entered the spray area, the controller controls the audible and visual alarm to sound an alarm and adjusts or shuts down the spray unit.

[0027] The controller is also equipped with a 4G / 5G communication module and a GPS / BeiDou positioning and timing module, which are used to link data with the remote monitoring platform and construction equipment to realize remote start and stop, fault diagnosis and fully automatic start and stop in conjunction with vehicle operation.

[0028] Working Principle: The system first monitors the concentration of PM2.5, PM10, and other particulate matter in the air in real time using dust sensors, and acquires the real-time location information of dust-generating equipment such as excavators and dump trucks through a positioning receiver module. This environmental data is then uploaded to the central controller. The controller's built-in intelligent algorithm analyzes and integrates the data, issuing control commands. On one hand, it drives the variable frequency high-pressure pump to adjust the output water pressure to control the spray volume and range. On the other hand, it controls the servo motors of the multi-layer spray units mounted on the segmented retractable column, driving them to perform 360° horizontal rotation and pitch angle adjustment, thereby precisely directing the water mist jet towards the moving dust source. Simultaneously, the system integrates an anemometer and soil moisture sensor, allowing the controller to adjust the spray direction based on wind speed and direction. The system optimizes the spray angle to enhance coverage and suppresses spraying when the ground is too wet to prevent mud formation. Wastewater and surface runoff after spraying are collected in drainage ditches, purified through sedimentation tanks, multi-stage filtration devices, and disinfection devices, then stored in a recycled water tank. Finally, a recycled water pump returns the wastewater to the original water tank, achieving a closed-loop water resource recycling system. Furthermore, a lidar unit atop the column continuously scans the surrounding environment. If personnel or equipment are detected entering the spray area, the controller immediately triggers an audible and visual alarm and adjusts or stops the spraying to ensure safety. The entire system can also be linked with a remote monitoring platform and construction equipment via 4G / 5G communication modules and GPS / BeiDou modules, enabling remote monitoring, intelligent start / stop, and fully automated, energy-efficient dust suppression operations synchronized with the work process. Reference Figure 4 As shown, this utility model also includes a method for intelligent dust suppression using fixed fogging piles at building construction sites, comprising the following steps: S1: Obtain real-time location and operating status information of construction equipment; S2: Based on the real-time location information and construction plan information, predict the high-dust operation areas and operation types within a future preset time period; S3: Before the construction equipment enters the high dust operation area, a pre-start command is generated to control the fixed fog pile system to enter the preparatory state; S4: Acquire environmental monitoring data of the high-dust work area in real time, and the environmental monitoring data includes at least dust concentration and wind speed and direction; S5: Based on the operation type and the environmental monitoring data, dynamically adjust the spray parameters of the fixed fog pile system, wherein the spray parameters include spray range, spray angle, spray pressure and spray flow rate.

[0029] Specifically, this case takes the earthwork excavation stage of a large commercial complex project as an example, as follows: A fixed fogging station is placed every 35 meters along the construction fence. The fogging station posts are fixed with quick-installation bases, and the height is adjusted to 6 meters. Dust sensors (model: Panteng PMS7003) are installed at the center of the construction site and on each fogging station; an anemometer (model: Vaisala WXT520) is installed at the highest point; soil moisture sensors (model: STE soil three-parameter sensor) are buried 5cm deep in the earthwork operation area, main access roads and material storage yards. In addition, Beidou positioning terminals are installed on all excavators and dump trucks, and their equipment types (such as "excavator-CAT320D", "dump truck-FAW Jiefang") are entered into the system database. Specific implementation process: In step S1, the system polls and reads the NMEA-0183 protocol data of each Beidou terminal once per second through the 4G network, and parses out its latitude and longitude coordinates (WGS-84 standard), speed, and heading angle. The operating status information is obtained by parsing the CAN bus data (through the equipment manufacturer's authorized interface). For excavators, the "hydraulic main pump pressure" value (unit: Bar) is taken as the work intensity index. In step S2, the pre-stored job models exist in the form of database tables. For example:

[0030] The system reads the real-time location of a CAT320D (ID: EXC-001) as (E116.°XX, N39.°YY), with a hydraulic pressure of 180 Bar, and immediately marks it as a high-intensity dust source. Combining this with its heading angle (e.g., 90°) and speed (0 km / h), the system predicts that the high-dust work area within the next 2 minutes will be a circular area with a radius of 15 meters centered on this point. Preferably, the system is deployed on a cloud platform, and its prediction module embeds the open-source OpenFOAM CFD solver. After receiving the equipment data, this module automatically calls a pre-generated 3D mesh model of the construction site (generated based on the BIM model) and, using the current wind speed of 4.8 m / s and northwest wind direction as boundary conditions, initiates a transient simulation. The simulated dust diffusion velocity vector (e.g., direction 135°, speed 0.5 m / s) is returned to the ground-based linkage control module via a RESTful API. The entire CFD calculation process can be completed within 60 seconds to meet real-time requirements. In step S3, the system sends a pre-start command to the mist dome (ID: MIST-005) located downwind of EXC-001, southeast of it. This command causes the variable frequency high-pressure pump of MIST-005 to run at a low speed of 25Hz, maintaining the pipeline pressure at 0.8MPa. Simultaneously, it controls the servo motor of the top spray unit to rotate, pointing its nozzle axis to an azimuth angle of 135° (i.e., the vector direction predicted by CFD), and lowering the pitch angle to -10° (to cover a closer area). At this moment, the system is in a "trigger half-pulled" state, and the actual measured response delay of the entire system is 380 milliseconds. In steps S4 and S5, based on the "intensity level 4" obtained in S2, the system sets the following baseline values ​​for MIST-005: water pump frequency 50Hz (pressure approximately 7 MPa), flow rate 60 L / min. The dust sensor of MIST-005 detects that the PM10 concentration instantly rises to 800 micrograms per cubic meter. The PID control algorithm in the system (proportional coefficient Kp=0.5, integral time Ti=10s) calculates the correction amount based on the deviation between the set value (150 micrograms per cubic meter) and the measured value, and increases the water pump frequency to 55Hz. The anemometer shows that the instantaneous wind speed increases to 4.8m / s, and the system immediately executes headwind compensation. The PID control algorithm is executed in the PLC of the fog pile with a cycle of 100ms, and its control error e(t) = PM10 set value - PM10 measured value. Its output u(t) is the increment of the water pump frequency (unit: Hz), and the calculation formula is: u(t) = Kp * e(t) + Ki * ∫e(t)dt + Kd * de(t) / dt, where Kp=0.5, Ki=1 / Ti=0.1, Kd=0 (PI control is used in this example). The calculated u(t) is added to the current frequency value to obtain the new target frequency (e.g., 50 + 5 = 55Hz), and written to the frequency setpoint register of the frequency converter (e.g., address: 0x1001) via the Modbus RTU protocol, thereby completing a closed-loop control: the horizontal angle of the spray unit is finely adjusted from 135° to 120° to counteract the offset caused by the wind; at the same time, the water pump frequency is further increased to 58Hz to increase the pressure so that the droplets are finer and avoid being blown away by the strong wind, ensuring that the droplets can effectively cover the dust diffusion path.

[0031] The prediction in step S2 specifically includes: calling a pre-stored construction equipment operation model, which defines the mapping relationship between different equipment types and typical dust emission intensities; and calculating the predicted dust generation intensity level of the high-dust operation area by combining the real-time location information, equipment type, and operating status information.

[0032] Furthermore, in step S2, the prediction module constructs a digital twin scene based on the BIM model or 3D point cloud scan model of the target construction site. This model includes not only the terrain and landforms, but also details such as buildings and stockpiles. The system combines the principles of computational fluid dynamics (CFD) to simulate the dust diffusion path and settling law under different wind speeds and directions in the digital twin, thereby achieving ultra-high accuracy prediction of the dust cloud movement trajectory and providing more accurate guidance for the vector spraying of the spray unit.

[0033] The preparatory state described in step S3 includes: starting the high-pressure pump to a low-speed standby state, maintaining the pipeline base pressure, and controlling the spray unit to rotate toward the work point that the construction equipment is expected to reach; the spray unit is in a ready-to-trigger state with a response delay of less than 500 milliseconds.

[0034] Furthermore, the standby state is a low-power standby mode, distinct from complete shutdown and full-power operation. In this state, the high-pressure pump operates at low speed, maintaining only the baseline pressure within the pipeline (e.g., 0.5-1 MPa), avoiding wear and tear on the pump body from frequent start-stop cycles. Simultaneously, the servo motor of the spray unit has been pre-rotated to the expected operating point direction, ensuring that the system's overall response time (i.e., response delay) from receiving the trigger command to spraying effective droplets can be controlled within 500 milliseconds. This allows for timely responses to sudden dust emissions, solving the problem of excessively long delays (typically several seconds to over ten seconds) caused by pump startup and mechanical inertia in traditional systems.

[0035] The dynamic adjustment in step S5 specifically includes: setting a baseline value for the spray parameters based on the predicted dust generation intensity level; and then performing closed-loop feedback correction on the baseline value based on the real-time dust concentration data and wind speed and direction data.

[0036] The dynamic adjustment in step S5 also includes: calculating the direction and velocity vector of dust diffusion based on wind speed and direction data; controlling the spray unit to spray towards the upwind direction of the vector; and adjusting the spray pressure according to the wind speed value to ensure that the droplets effectively cover the diffusion path.

[0037] The dynamic adjustment of spray parameters includes headwind compensation control based on wind speed and direction data: the linkage control module receives data from the anemometer in real time and calculates the target spray azimuth angle and target pressure of the spray unit through the built-in headwind compensation algorithm. The target spray azimuth angle is the opposite direction of the current wind direction plus a compensation offset angle calculated based on wind speed and empirical coefficients to ensure that the droplets can accurately cover the dust diffusion path under the action of wind. The target pressure is positively correlated with the wind speed value. When the wind speed increases, the variable frequency high-pressure pump is controlled to increase the output frequency to increase the spray pressure, generating finer and higher kinetic energy droplets to counteract the wind dispersion. The calculated instructions are sent to the servo motor and variable frequency water pump of the spray unit in real time to drive their precise actions, forming a dynamic, closed-loop vector spray control mechanism that effectively counteracts the impact of changing wind direction. Furthermore, the headwind compensation vector control is based on the fact that lateral wind forces can cause droplets to deviate from their predetermined paths. To counteract this effect, the system calculates a headwind compensation angle θ in real time using a built-in model. This angle is directly proportional to the wind speed and inversely proportional to the spray pressure (θ ∝ WS / P). Subsequently, the system controls the spray unit to rotate to the target azimuth angle = current wind direction + 180° + θ for spraying, ensuring that the actual trajectory of the droplets under the influence of the wind precisely covers the dust diffusion path. Simultaneously, the system synchronously increases the spray pressure based on the wind speed value to ensure that the droplets have sufficient kinetic energy and range to penetrate the wind field, achieving precise dust suppression.

[0038] It also includes the following safety obstacle avoidance steps: S6: Real-time monitoring of obstacles around fog cones using lidar point cloud data, and construction of a dynamic obstacle map; S7: When equipment or personnel are detected entering the preset safe distance range, the danger azimuth angle is automatically calculated; S8: Immediately shut down the spray unit covering the dangerous azimuth angle and trigger an audible and visual alarm, while simultaneously generating a safety log on the construction management platform.

[0039] In step S8, the system further uploads the hash values ​​of key environmental data (such as early warning records, dust suppression equipment operation logs, and water and electricity consumption) to the blockchain for evidence storage, generating an immutable and self-verified environmental report. This provides absolutely credible data support for environmental supervision and also makes it easier for construction companies to prove the compliance of their green construction.

[0040] In steps S6-S8, the 16-line lidar on top of the MIST-005 scans at a frequency of 10Hz. The point cloud clustering algorithm detects a moving object entering its 2-meter radius and calculates its azimuth angle to be 70°. The control system immediately shuts down the nozzle group covering the 60°-80° azimuth angle (but not all of them) and sends an audible and visual alarm to the worker's wristband and the terminal in the excavator cab in the area via the LORA wireless module.

[0041] Among them, the 16-line lidar (model: Hesai QT16) scans at a frequency of 10Hz, outputting raw point cloud data, and the fog pile has an embedded computer (such as Jetson) built in. The Nano runs the Euclidean clustering extraction algorithm in the Point Cloud Library (PCL) with the following parameters: point cloud distance threshold of 0.25 meters, minimum number of points in a cluster of 50, and maximum number of points of 25,000. The algorithm identifies a cluster center point entering a 2-meter warning range. This parameter combination can effectively distinguish independent obstacles on the construction site and filter noise. For each identified valid cluster, the system calculates its three-dimensional centroid coordinates and converts them into distance and azimuth relative to the fog cones. When an obstacle is detected entering the warning area, the system does not simply shut down the entire area. Instead, it generates a zone control command based on the azimuth information and closes the solenoid valves within the corresponding azimuth range via CAN bus communication. This achieves precise obstacle avoidance and maximizes the continuity of dust suppression operations. When the azimuth is 70°, the system immediately generates a control command and sends it to the solenoid valve controller via CAN bus to close the solenoid valves controlling the nozzles within the 70° azimuth range. At the same time, an alarm message is broadcast via the LORA wireless module.

[0042] It also includes the following water resource recycling steps: S9: Collect wastewater generated during dust suppression operations through site drainage ditches; S10: The wastewater is treated by passing it through a sedimentation tank, a multi-stage filtration device, and an ultraviolet disinfection device; S11: Store the treated water in a recycled water tank and use it preferentially in subsequent dust suppression operations.

[0043] The process after step S5 also includes: S12: Real-time monitoring of ground surface humidity in the dustfall area using a humidity sensor buried underground; S13: When the surface humidity exceeds a preset threshold, a control command is generated to reduce the spray volume or switch to intermittent spray mode to prevent the ground from becoming muddy.

[0044] Furthermore, in steps S12 and S13, surface humidity refers to the moisture content of the shallow soil layer, monitored by a soil moisture sensor buried 5-10cm underground. This value more directly reflects the risk of mud formation on the ground, superior to monitoring only air humidity. The 'intermittent spray mode' refers to the system switching from continuous spraying to a 'spray-stop cycle' mode, for example, working for 2 seconds and stopping for 8 seconds. This maintains a certain level of dust-suppressing humidity in the air while allowing sufficient time for the ground to absorb or evaporate moisture, effectively preventing mud formation and water accumulation caused by continuous overspraying.

[0045] In steps S9-13, the sprayed wastewater flows into a three-stage sedimentation tank through a drainage ditch, and is then treated by a multi-stage filtration device of "quartz sand + activated carbon" and a UVLED ultraviolet disinfection device before being stored in a recycled water tank (45). When the soil moisture sensor detects that the humidity in a certain area reaches 25% (the threshold is set to 22%), the system automatically switches the spray mode corresponding to that area from continuous spraying to intermittent mode (spray for 3 seconds, stop for 10 seconds), effectively preventing the ground from becoming muddy.

[0046] The method also includes a nighttime construction mode: receiving ambient light sensor signals or determining the nighttime mode based on system time; in nighttime mode, automatically reducing the spray intensity and controlling the spray unit to avoid main traffic lanes and lighting areas, so as to avoid water mist causing scattering interference to vehicle lights and illumination.

[0047] Reference Figure 5 As shown, the present invention also includes an intelligent dust suppression system, comprising: The prediction module is used to predict high-dust work areas based on the location and planning information of construction equipment. This module is implemented by a Python program deployed on a cloud server, integrating an MQTT client, database interface, and OpenFOAM API. The linkage control module is used to generate pre-start commands and dynamically adjust spray parameters; this module is implemented by a structured control program in the local Siemens S7-1200 PLC of the fog pile, responsible for performing PID calculations, MQTT communication, and Modbus control. The environmental sensing module is used to acquire dust concentration, wind speed and wind direction data; The equipment positioning module is used to obtain the real-time location of the construction equipment.

[0048] Example 2: Taking steel structure cutting and welding as an example The "plasma cutter" and "welding machine" are entered into the system. Their operating status is determined by monitoring their working current using a wireless current clamp meter. The rule is set as follows: if the current is >30A, the dust / fume emission intensity level is "high". When the system detects that the current of the cutting machine in a certain area reaches 50A, it immediately predicts that point is a dust source. Because the cutting fume particles are smaller, the system automatically adjusts the spray parameters, increasing the water pump pressure to over 10MPa to ensure finer droplets and higher capture efficiency. Other steps are similar to those in Example 1.

[0049] Therefore, the system of the present invention has a high degree of flexibility and configurability, and can be easily adapted to completely different working conditions by adjusting the parameters and spray parameters in the operation model database.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixed, rotatable mist pile dust suppression device for building construction sites, characterized in that, It includes the fog pile body (1), water supply system (2), control system (3) and wastewater recycling system; The fog pile body (1) includes a column (11) and at least one layer of spraying units (12) installed on the column (11). The water supply system (2) includes a raw water tank (21), a water treatment device (22), a high-pressure pump and the spray unit (12) connected in sequence by pipelines. The control system (3) includes a controller, a dust sensor electrically connected to the controller, and a positioning receiving module for monitoring the location of construction equipment; the controller is electrically connected to the high-pressure pump and the spray unit (12) and is used to dynamically adjust the water pressure and spray range according to the dust concentration and dust source location information; The wastewater recycling system includes a collection ditch, a sedimentation tank, and a recycled water tank, with the outlet of the recycled water tank connected to the inlet of the raw water tank.

2. The fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, The spray unit (12) is a multi-layer annular nozzle array. Each layer of the spray unit (12) is independently connected to a servo motor, which is electrically connected to the controller. In this way, the controller receives the signal from the positioning receiving module and controls the servo motor to drive the spray unit to rotate horizontally and adjust the pitch angle towards the dust source.

3. The fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, The column (11) is a segmented telescopic structure made of corrosion-resistant composite material, with a hollow interior and the pipelines and cables laid inside; the bottom of the column (11) is provided with two interchangeable mounting bases: a pre-embedded foundation and a quick-install counterweight base.

4. A fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, The high-pressure pump includes a water softening device and a precision filter connected in sequence.

5. A fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, The wastewater recycling system also includes a multi-stage filtration device and a disinfection device installed between the sedimentation tank and the recycled water tank; the outlet of the recycled water tank is connected to the inlet of the raw water tank (21) through a recycled water pump.

6. A fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, The control system (3) also includes a wind speed and direction sensor and a soil moisture sensor that are electrically connected to the controller; the controller further optimizes the spray angle of the spray unit (12) based on the wind speed and direction information, and suppresses spraying based on the soil moisture information to prevent the ground from becoming muddy.

7. A fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, It also includes an obstacle avoidance safety system, which includes a laser radar sensor and an audible and visual alarm; the laser radar sensor is fixedly installed on the top of the column (11), and its signal output terminal is electrically connected to the signal input terminal of the controller, and the audible and visual alarm is electrically connected to the electrical output terminal of the controller; when an obstacle is detected to intrude into the spray area, the controller controls the audible and visual alarm to sound an alarm and adjusts or shuts down the spray unit.

8. A fixed, rotatable mist pile dust suppression device for building construction sites according to claim 1, characterized in that, The controller is also equipped with a 4G / 5G communication module and a GPS / BeiDou positioning and timing module, which are used to link data with the remote monitoring platform and construction equipment to realize remote start and stop, fault diagnosis and fully automatic start and stop in conjunction with vehicle operation.

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