A road construction dust reduction device

Abstract

This invention relates to the field of dust suppression devices, specifically a dust suppression device for road construction. The invention includes a platform, a water tank, a water supply assembly, and multiple dust suppression components. Each dust suppression component comprises an outer cylinder, an inner cylinder, and a dual-rotor motor. The output shaft of the inner rotor is connected to a conical atomizing disc, and the output shaft of the outer rotor is connected to fan blades. Swirling blades are provided between the outer wall of the inner cylinder and the inner wall of the outer cylinder, and a constriction section is provided at the front end of the outer cylinder. This invention independently drives the fan blades and the atomizing disc using a dual-rotor motor. The airflow generated by the fan blades forms a strong swirling flow through the swirling blades. At the constriction section, due to shear layer instability, a frequency-adjustable pulse vortex ring is formed. When the vortex ring frequency matches the natural frequency of the dust, resonance occurs, disrupting the air film on the dust surface and allowing fine dust to be efficiently captured by the mist droplets. This invention achieves targeted capture of PM2.5-PM10 level fine dust, while the pulse vortex ring can also suck out and remove dust accumulated in road surface cracks, offering advantages such as high dust suppression efficiency, water and energy saving, and prevention of secondary dust generation.

Description

Technical Field

[0001] This invention relates to the manufacture of special equipment for environmental protection, and more particularly to the field of dust suppression devices, specifically a dust suppression device for road construction. Background Technology

[0002] Road construction dust control refers to the technical measures taken to suppress and remove dust generated during road construction, renovation, milling, and sweeping. Construction dust mainly originates from dust generated during road milling, cutting, and crushing, as well as secondary dust caused by construction vehicles. The particle size distribution is wide, ranging from coarse particles of several hundred micrometers to fine dust at the PM2.5 level, seriously impacting the health of construction workers, the surrounding air quality, and the quality of road construction (such as the cleanliness requirements before applying tack coats and seal coats).

[0003] Currently, dust suppression during road construction mainly employs the following two types of technologies: High-pressure mist cannons: These use a high-pressure water pump to atomize water, which is then blown out by a fan to form a large-area water mist curtain, capturing dust using the principles of inertial collision and gravity settling. However, for fine dust particles smaller than 50μm (especially PM10-PM2.5 particles), due to their small mass and strong tracking ability, the water mist particles create an airflow around the dust as they approach, causing the dust to be carried around the water droplet surface by the airflow and making it difficult to be captured by collision, resulting in a decrease in dust suppression efficiency.

[0004] Boom spraying system: This system sprays water mist onto the road surface using booms arranged along the construction area. While simple in structure, this method suffers from problems such as high water consumption, muddy road surfaces, and dust re-entrainment after water evaporation. Especially in dry and hot road conditions, the water evaporates rapidly, and the settled dust is easily re-entrained by vehicles or wind, creating a false settling effect and failing to achieve long-term dust suppression. Summary of the Invention

[0005] The purpose of this invention is to provide a dust suppression device for road construction to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions: A dust suppression device for road construction includes: The tabletop is equipped with a power supply and control panel. A push handle is fixedly installed at the rear end of the tabletop. Support columns are fixedly connected to the bottom of the tabletop near the four corners. Casters are installed at the bottom of the support columns. A water tank is fixedly installed between the four support columns. A water supply assembly fixedly installed on the water tank; Multiple sets of dust-suppressing components are fixedly installed on the top surface of the countertop. These components are arranged in an array along the length of the countertop. Each dust-suppressing component includes: Angle adjustment assembly fixedly installed on the top surface of the table; Rotate the pulse-type vortex dust suppression assembly mounted on the adjustment component.

[0007] Furthermore, the pulse-type vortex dust suppression assembly includes an outer cylinder, both ends of which are open. A constriction section is provided at the front of the outer cylinder, and a filter assembly is detachably and fixedly installed at the tail end of the outer cylinder. Two symmetrically arranged pins are fixedly installed at the middle position of the outer cylinder's periphery, and a hinge seat is fixedly installed at the lowest point near the tail end of the outer cylinder's periphery. An inner cylinder is coaxially arranged within the outer cylinder. A dual-rotor motor is fixedly installed within the inner cylinder. The output shaft of the inner rotor of the dual-rotor motor extends towards the outside of the inner cylinder and is then fixedly installed with a conical atomizing disc. A liquid supply pipe is provided in the conical atomizing disc. The other end of the liquid supply pipe passes through the outer cylinder and is fixedly connected to the water supply assembly in a through manner. The outer periphery of the inner cylinder is set as a tapered part near the filter component. The outer rotor output shaft of the dual rotor motor rotates through the inner cylinder away from the tapered atomizing disc via a sealed rotary bearing and is then fixedly installed with a mounting column. Multiple fan blades are fixedly installed in a circumferential array around the mounting column. The outer periphery of the inner cylinder is fixedly connected to the inner wall of the outer cylinder at a position near the tail end, with multiple swirl blades arranged in a circumferential array about the axis of the inner cylinder.

[0008] Furthermore, the conical atomizing disc has an umbrella-shaped conical structure, and multiple dispersing blocks are fixedly installed on the inner side of the conical atomizing disc near the edge, arranged in an axial array about the axis of the inner rotor output shaft. The liquid supply tube is located at one end in the conical atomizing disc, close to the inner end face of the conical atomizing disc.

[0009] Furthermore, the filter assembly includes a filter disc that is detachably and fixedly installed to the tail end of the outer cylinder, and the side of the filter disc has multiple sets of rectangular array filter holes that are circumferentially distributed about the axis of the filter disc. A motor is fixedly installed at the center of the outer side of the filter disc. The output shaft of the motor rotates through the filter disc and is then fixedly installed with a second mounting column. A triangular prism is fixedly installed on the periphery of the second mounting column, which is perpendicular to the axis of the second mounting column. Multiple sets of cleaning components that are connected to the triangular prism are fixedly installed on the inner side of the filter disc. The number of the multiple sets of cleaning components is equal to the number of multiple rectangular array filter holes and they are aligned one by one.

[0010] Furthermore, the cleaning component includes a linkage frame aligned with the rectangular array of filter holes at the corresponding position. Multiple insert rods aligned with multiple filter holes in the rectangular array are fixedly installed on the side of the linkage frame near the filter disc. A contact rod that cooperates with a triangular prism is rotatably connected to the center position of one end of the linkage frame near the axis of the filter disc. Both sides of the linkage frame are fixedly installed with protrusions near the ends, and elastic telescopic rods are fixedly connected between the protrusions and the sides of the filter disc.

[0011] Furthermore, the angle adjustment assembly includes a U-shaped mounting base and an electric push rod. The U-shaped mounting base is fixedly installed on the top surface of the table, and the outer cylinder is located at the top position between the U-shaped mounting bases. The outer cylinder is rotatably connected to both sides of the U-shaped mounting base through the pin. The electric push rod is disposed between the outer cylinder and the platform. The telescopic end of the electric push rod is fixedly connected to the outer periphery of the pin of the first hinge seat, and the other end of the electric push rod is hinged to the top surface of the platform through the second hinge seat.

[0012] Furthermore, the water supply assembly includes a water tank fixedly installed on a support frame. An extension plate is fixedly installed on one side of the water tank, and a water pump is fixedly installed on the extension plate. The water inlet of the water pump extends into the water tank, and a conduit is fixedly connected to the water outlet of the water pump. A diversion pipe fixedly installed on the table is fixedly connected to the end of the conduit away from the water pump. Multiple liquid outlets, equal in number to the number of multiple sets of dust suppression components, are provided around the periphery of the diversion pipe. Flexible conduits are connected to the liquid outlets, and the ends of the multiple flexible conduits away from the liquid outlets are respectively fixedly connected to the ends of multiple liquid supply pipes located outside the outer cylinder.

[0013] Furthermore, a dust particle size sensor electrically connected to the control panel is installed at the front end of the tabletop.

[0014] The beneficial effects of this invention are: 1. This invention utilizes a pulsed vortex dust suppression assembly driven by a dual-rotor motor. The inner rotor drives an atomizing disc to generate micron-sized droplets, while the outer rotor drives fan blades to create a strong swirling flow. Through the synergistic action of the swirling blades and the converging section, an intermittent pulsed vortex ring with an adjustable frequency is formed. When the vortex ring frequency matches the natural frequency of the dust, mechanical resonance occurs, disrupting the air film on the dust surface. This allows the fine dust to actively collide with and be captured by the droplets, solving the problem in existing technologies where fine dust is difficult to capture due to airflow around it.

[0015] 2. This invention generates instantaneous local negative pressure and airflow disturbance on the road surface through the periodic impact of the pulse vortex ring, which can suck out and capture stubborn dust embedded deep in the road surface texture on the spot, achieving deep cleaning of dust in road surface gaps and solving the technical problem that traditional sprinkler trucks cannot remove dust from road surface gaps.

[0016] 3. This invention utilizes a conical atomizing disc combined with a dispersing block structure to tear water into uniformly sized droplets under high-speed centrifugal force. Combined with a resonance capture mechanism, this allows the water mist to fully contact the dust, forming agglomerates that settle. Even if the water evaporates, what remains are large-diameter agglomerated dust particles, rather than discrete micro-dust, thus solving the problem of dust re-entrainment caused by water evaporation after traditional water spraying.

[0017] 4. By using a motor to drive a triangular prism to periodically push the insert rod into the filter hole, the filter hole is automatically cleaned online, avoiding the problems of reduced air intake and weakened pulse vortex ring intensity caused by filter hole blockage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 A three-dimensional diagram from another angle; Figure 3 This is a three-dimensional schematic diagram of the dust suppression component in this invention; Figure 4 yes Figure 3 A three-dimensional diagram from another angle; Figure 5 This is a three-dimensional schematic diagram of the internal structure of the outer cylinder in this invention; Figure 6 In this invention Figure 5 A three-dimensional diagram from another angle; Figure 7 yes Figure 6 Enlarged view of section A; Figure 8 This is a three-dimensional schematic diagram of the filtering component in this invention; Figure 9 This is a three-dimensional schematic diagram of the connection relationship between the cleaning component and the filter disc in this invention; Figure 10 yes Figure 9 Enlarged view of section B; The attached figures are labeled as follows: 1-Tabletop, 2-Support column, 3-Cascading casters, 4-Support frame, 5-Water tank, 6-Extension plate, 7-Water pump, 8-Conduit, 9-Diverter pipe, 10-Dust particle size sensor, 11-Control panel, 12-Push handle, 13-Dust suppression assembly, 14-Disintegrating block, 15-Liquid outlet, 16-Liquid supply pipe, 17-Flexible conduit, 18-U-shaped mounting base, 19-Pin, 20-Hinge base one, 21-Hinge base two, 22-Electric push rod, 23-Outer cylinder, 24- - Shrinkage section, 25- Filter assembly, 26- Inner cylinder, 27- Inner rotor output shaft, 28- Conical atomizing disc, 29- Swirl blade, 30- Outer rotor output shaft, 31- Mounting post one, 32- Fan blade, 33- Conical part, 34- Filter disc, 35- Rectangular array filter holes, 36- Motor, 37- Cleaning assembly, 38- Mounting post two, 39- Triangular prism, 40- Contact rod, 41- Linkage frame, 42- Protrusion, 43- Elastic telescopic rod, 44- Pin. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please see Figure 1 and Figure 2 In this embodiment of the invention, a road construction dust suppression device includes: The tabletop 1 is equipped with a power supply and control panel 11. A push handle 12 is fixedly installed at the rear end of the tabletop 1. A dust particle size sensor 10, which is electrically connected to the control panel 11, is installed at the front end of the tabletop 1. Support columns 2 are fixedly connected to the bottom of the tabletop 1 near the four corners. Casters 3 are installed at the bottom of the support columns 2. A water tank 5 is fixedly installed between the four support columns 2. Water supply components are fixedly installed on water tank 5; Multiple sets of dust-suppressing components 13 are fixedly installed on the top surface of the tabletop 1. The multiple sets of dust-suppressing components 13 are arranged in an array along the length of the tabletop 1. The dust-suppressing components 13 include: An angle adjustment assembly is fixedly installed on the top surface of tabletop 1; Rotate the pulse-type vortex dust suppression assembly mounted on the adjustment component.

[0021] The device can be moved by a pusher 12 or by connecting to a vehicle via a tow frame, and is also moved using casters 3. The dust particle size sensor 10 detects the dust particle size distribution in the road construction area in real time and transmits the signal to the control panel 11. Based on the detection results, the control panel 11 sends control commands to the various actuators in subsequent embodiments to achieve precise dust suppression.

[0022] Multiple dust suppression components 13 are arrayed along the length of the platform 1, which can cover a wider construction area. The water tank 5 is set between the four pillars 2, which lowers the center of gravity of the whole machine and improves the structural stability of the device.

[0023] Example 2: Please see Figures 3-6 Based on Example 1, the pulse-type vortex dust suppression assembly includes an outer cylinder 23, both ends of which are open. A constriction section 24 is provided at the front of the outer cylinder 23. A filter assembly 25 is detachably fixedly installed at the tail end of the outer cylinder 23. Two symmetrically arranged pins 19 are fixedly installed at the middle position of the outer periphery of the outer cylinder 23. A hinge seat 20 is fixedly installed at the lowest point near the tail end of the outer periphery of the outer cylinder 23. An inner cylinder 26 is coaxially arranged in the outer cylinder 23. A dual-rotor motor is fixedly installed in the inner cylinder 26. The inner rotor output shaft 27 of the dual-rotor motor extends towards the outside of the inner cylinder 26 and is fixedly installed with a conical atomizing disc 28. A liquid supply pipe 16 is provided in the conical atomizing disc 28. The other end of the liquid supply pipe 16 passes through the outer cylinder 23 and is fixedly connected to the water supply component in a through manner. The outer periphery of the inner cylinder 26 is set as a conical part 33 near the filter assembly 25. The outer rotor output shaft 30 of the dual rotor motor rotates through the inner cylinder 26 away from the conical atomizing disc 28 via a sealed rotating bearing and is then fixedly installed with a mounting post 31. Multiple fan blades 32 arranged in a circumferential array are fixedly installed around the mounting post 31. Multiple swirl blades 29 are fixedly connected to the outer wall of the outer cylinder 23 near the tail end of the outer cylinder 26. These blades are arranged in a circumferential array about the axis of the inner cylinder 26.

[0024] The dual-rotor motor fixedly installed in the inner cylinder 26 has a coaxial dual-output structure. The inner rotor output shaft 27 drives the conical atomizing disk 28 to rotate at high speed. The liquid supply pipe 16 delivers water to the inner end face of the conical atomizing disk 28, where it is torn into micron-sized droplets under centrifugal force. The outer rotor output shaft 30 drives the mounting column 31 and the circumferentially arrayed fan blades 32 to rotate, drawing in outside air from the filter assembly 25.

[0025] An annular air duct is formed between the inner cylinder 26 and the outer cylinder 23. After the airflow enters the annular air duct, it flows through the circumferentially arrayed swirl blades 29. Under the guidance of the blades, the axial momentum of the airflow is forcibly converted into tangential momentum, forming a strong swirling flow (swirl number S>0.6). During this process, the helical rise angle design of the swirl blades 29 causes the airflow to generate high-speed rotational motion, providing the energy basis for the subsequent formation of pulse vortex rings.

[0026] When the rotating airflow reaches the contraction section 24, its axial velocity increases sharply due to the tapering of the outer cylinder's front end, while the airflow in the central region of the inner cylinder's front end (behind the conical atomizing disc 28) remains almost still. At the outlet cross-section, a high-speed shear layer is formed, characterized by a slow center and a fast periphery. This shear layer satisfies the Kelvin-Helmholtz instability condition in fluid dynamics, and the shear layer interface periodically rolls up, forming independent vortex rings. Because this instability occurs periodically, after the first vortex ring detaches, the shear layer needs time to re-accumulate energy to form the second vortex ring, resulting in intermittent, pulsed jets, rather than the continuous airflow of a traditional fog cannon. The tapering structure of the contraction section 24 acts as a nozzle, further accelerating the airflow and promoting the formation and detachment of vortex rings. Furthermore, by designing the contraction ratio of the contraction section 24, the basic frequency range of the vortex rings can be preset.

[0027] By adjusting the speed difference between the inner and outer rotors of the dual-rotor motor, the vortex ring disengagement frequency can be precisely controlled. When this frequency matches the specific particle size dust detected by the dust particle size sensor 10 (such as the natural frequency of PM10 cement powder, 15-25Hz), mechanical resonance occurs. The resonance disrupts the dense air film on the surface of the dust particles, preventing the dust from bypassing the water mist with the airflow. Instead, the dust is forced to vibrate and actively collide with the mist droplets, achieving efficient capture.

[0028] Furthermore, when the pulse vortex ring acts on the road surface, the instantaneous local negative pressure and periodic airflow impact force it generates can suck out and capture stubborn dust embedded deep in the texture of the asphalt pavement. This achieves deep cleaning of dust accumulated in road surface gaps, playing a dual role of pneumatic sweeping and dust suppression.

[0029] Example 3: Please see Figure 6 and Figure 7 Based on Example 2, the conical atomizing disk 28 has an umbrella-shaped conical structure, and multiple dispersing blocks 14 are fixedly installed on the inner side of the conical atomizing disk 28 near the edge, which are axially arrayed about the axis of the inner rotor output shaft 27. One end of the liquid supply tube 16 is located in the conical atomizing disk 28 and is close to the inner end face of the conical atomizing disk 28.

[0030] One end of the liquid supply pipe 16 is located close to the inner end face of the conical atomizing disk 28, ensuring that water is directly delivered to the center of the disk. Under the action of centrifugal force from high-speed rotation, the water is thrown outward along the conical disk surface. When the water flows past the circumferential array of dispersing blocks 14 near the edge, it collides at high speed with the dispersing blocks 14 and is further torn into smaller and more uniformly distributed droplets.

[0031] The finer droplets have a larger specific surface area, resulting in significantly improved wetting efficiency when they come into contact with dust particles whose air film has been disrupted by resonance. Simultaneously, because the droplet size matches the scale of the pulsed vortex ring, the droplets can be effectively entrained and transported over greater distances by the vortex ring, avoiding the tendency of traditional fine fog to disperse easily.

[0032] By precisely matching the vortex ring frequency with the natural frequency of the dust, the surface structure of the dust is destroyed due to resonance after it is captured. The water mist can more firmly wrap the dust particles, forming agglomerates that settle. Even if the water evaporates, what remains are large-diameter agglomerated dust particles, rather than discrete micro-dust, thus solving the problem of false settling of dust after traditional water spraying.

[0033] Example 4: Please see Figures 8-10 Based on embodiment 2, the filter assembly 25 includes a filter disc 34 that is detachably fixed to the tail end of the outer cylinder 23. The side of the filter disc 34 has multiple sets of rectangular array filter holes 35 that are circumferentially distributed about the axis of the filter disc 34. A motor 36 is fixedly installed at the center of the outer side of the filter disc 34. After the output shaft of the motor 36 rotates through the filter disc 34, a second mounting column 38 is fixedly installed. A triangular prism 39, which is perpendicular to the axis of the second mounting column 38, is fixedly installed around the second mounting column 38. Multiple sets of cleaning components 37 that are connected to the triangular prism 39 are fixedly installed on the inner side of the filter disc 34. The number of cleaning components 37 is equal to the number of rectangular array filter holes 35 and they are aligned one by one.

[0034] The cleaning component 37 includes a linkage frame 41 aligned with the rectangular array of filter holes 35 at the corresponding position. Multiple insertion rods 44 aligned with multiple filter holes in the rectangular array of filter holes 35 are fixedly installed on the side of the linkage frame 41 near the filter plate 34. A contact rod 40 that cooperates with the triangular prism 39 is rotatably connected to the center position of one end of the linkage frame 41 near the axis of the filter plate 34. Both sides of the linkage frame 41 are fixedly installed with protrusions 42 near the ends, and elastic telescopic rods 43 are fixedly connected between the protrusions 42 and the side of the filter disc 34.

[0035] The filter assembly 25 includes a filter disc 34 with multiple sets of rectangular array filter holes 35 on its side to block larger particles such as gravel and bolts, protecting the fan blades 32, swirl blades 29, and motor from damage. However, during long-term use, the filter holes are easily clogged by fine dust, resulting in a decrease in air intake and affecting the strength of the pulse vortex ring.

[0036] In this embodiment, after the motor 36 starts, it drives the mounting column 38 and the triangular prism 39 to rotate. During rotation, the edges of the triangular prism 39 sequentially contact the contact rods 40 of each cleaning component 37. When the triangular prism 39 contacts the contact rod 40, the contact rod 40 is pressed, causing the linkage frame 41 to move towards the filter disc 34 under the limiting and guiding action of the protrusion 42 and the elastic telescopic rod 43, thereby inserting the insertion rod 44 into the corresponding filter hole and pushing out the blockage. After the triangular prism 39 continues to rotate and separates from the contact rod 40, the elastic telescopic rod 43 drives the linkage frame 41 to reset, and the set of filter holes reopens.

[0037] Example 5: Please see Figure 3 and Figure 4 Based on embodiment 2, the angle adjustment assembly includes a U-shaped mounting base 18 and an electric push rod 22. The U-shaped mounting base 18 is fixedly installed on the top surface of the platform 1, and the outer cylinder 23 is located at the top position between the U-shaped mounting bases 18. The outer cylinder 23 is rotatably connected to both sides of the U-shaped mounting base 18 through a pin 19. The electric push rod 22 is disposed between the outer cylinder 23 and the platform 1. The telescopic end of the electric push rod 22 is fixedly connected to the outer periphery of the pin of the first hinge seat 20. The other end of the electric push rod 22 is hinged to the top surface of the platform 1 through the second hinge seat 21.

[0038] The pitch angle of the outer cylinder 23 can be precisely adjusted by controlling the extension and retraction of the electric push rod 22. When the construction area is flat, horizontal spraying can be used; when the construction area has a slope or when it is necessary to suppress dust from high altitudes, the pitch angle can be adjusted to a suitable angle. This adjustment mechanism is linked with the dust particle size sensor 10: when it detects that the dust mainly comes from secondary dust caused by vehicles on the ground, the control panel 11 automatically lowers the pitch angle, making the pulse vortex ring spray closer to the ground, enhancing the suction effect on dust accumulated in ground crevices; when it detects that the dust mainly comes from high altitude dispersion, it automatically increases the pitch angle to expand the coverage area. This linkage control allows the device to adapt to different construction conditions without frequent manual intervention.

[0039] Example 6: Please see Figure 1Based on embodiment 2, the water supply assembly includes a water tank 5 fixedly installed on a support frame 4. An extension plate 6 is fixedly installed on one side of the water tank 5. A water pump 7 is fixedly installed on the extension plate 6. The water inlet of the water pump 7 extends into the water tank 5. A conduit 8 is fixedly connected to the water outlet of the water pump 7. A diversion pipe 9 fixedly installed on the platform 1 is fixedly connected to the end of the conduit 8 away from the water pump 7. Multiple liquid outlets 15 are provided around the diversion pipe 9, the number of which is equal to the number of multiple sets of dust suppression components 13. Flexible conduits 17 are connected to the liquid outlets 15. The ends of the multiple flexible conduits 17 away from the liquid outlets 15 are respectively fixedly connected to the ends of multiple liquid supply pipes 16 located outside the outer cylinder 23.

[0040] Multiple dust suppression components 13 share a water tank 5 and a water pump 7, but are connected in parallel via a branch pipe 9. Each dust suppression component 13 has an independent water supply pipe 16, ensuring no interference between them. When the speed of the atomizing disc in one dust suppression component 13 needs to be adjusted due to operating conditions, the change in its liquid supply will not affect the working stability of other components. The design of the flexible conduit 17 allows the water supply pipe to bend accordingly when the elevation angle of the dust suppression component 13 is adjusted by the electric push rod 22.

[0041] Example 7: The device also includes a PLC control system, which is integrated inside the control panel 11 and is electrically connected to the dust particle size sensor 10, each dual rotor motor, each electric push rod 22, each water pump 7 and each motor 36.

[0042] The dust particle size sensor 10 uses the laser scattering principle to detect the dust concentration and particle size distribution in the road construction area in real time, and transmits the detection signal to the PLC control system. The PLC control system has a built-in database of the correspondence between dust particle size and optimal dust suppression parameters, and automatically executes the following control logic based on the detected dust particle size distribution: When a high percentage of PM10 fine dust is detected, the PLC control system issues a command to reduce the speed of the outer rotor of each dual-rotor motor, while appropriately increasing the speed of the inner rotor (to refine the droplets) and improve the resonance capture efficiency of fine dust. When a high proportion of coarse dust particles is detected, the PLC control system issues a command to increase the speed of the outer rotor (to enhance the impact force of the vortex ring) and decrease the speed of the inner rotor (to increase the droplet size), with inertial collision capture as the primary method. The PLC control system adjusts the output pressure of water pump 7 through frequency converter according to the dust concentration change trend, so as to achieve dynamic matching between water supply and dust concentration, and save water while ensuring dust reduction effect. The PLC control system sends commands to each electric push rod 22 based on the dust distribution detected by the dust particle size sensor 10, so as to independently adjust the pitch angle of each group of dust suppression components 13 and achieve precise dust suppression in different zones.

[0043] The PID control algorithm, variable frequency speed control technology, sensor signal processing, and database matching used in the above control logic are all existing technologies known in the art. The hardware connection method, programming method, and parameter calibration technology of the PLC control system can all be implemented by those skilled in the art based on conventional automation control knowledge.

[0044] Through the closed-loop control described above, this device achieves automatic matching of the optimal vortex frequency, droplet size, water supply pressure, and spray angle based on the particle size distribution of the dust.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A dust suppression device for road construction, characterized in that, include: The table (1) is equipped with a power supply and control panel (11). A pusher (12) is fixedly installed at the end of the table (1). A support column (2) is fixedly connected to the bottom of the table (1) near the four corners. A caster wheel (3) is installed at the bottom of the support column (2). A water tank (5) is fixedly installed between the four support columns (2). A water supply assembly fixedly installed on the water tank (5); Multiple sets of dust-suppressing components (13) are fixedly installed on the top surface of the tabletop (1). The multiple sets of dust-suppressing components (13) are arranged in an array along the length of the tabletop (1). The dust-suppressing components (13) include: An angle adjustment component is fixedly installed on the top surface of the table (1); Rotate the pulse-type vortex dust suppression assembly mounted on the adjustment component.

2. The road construction dust suppression device according to claim 1, characterized in that, The pulse-type vortex dust suppression assembly includes an outer cylinder (23), both ends of which are open. A constriction section (24) is provided at the front of the outer cylinder (23). A filter assembly (25) is detachably fixed at the tail end of the outer cylinder (23). Two symmetrically arranged pins (19) are fixedly installed at the middle position of the outer periphery of the outer cylinder (23). A hinge seat (20) is fixedly installed at the low point near the tail end of the outer periphery of the outer cylinder (23). An inner cylinder (26) is coaxially arranged in the outer cylinder (23). A dual-rotor motor is fixedly installed in the inner cylinder (26). The inner rotor output shaft (27) of the dual-rotor motor extends towards the outside of the inner cylinder (26) and is fixedly installed with a conical atomizing disc (28). A liquid supply pipe (16) is provided in the conical atomizing disc (28). The other end of the liquid supply pipe (16) passes through the outer cylinder (23) and is fixedly connected to the water supply assembly in a through manner. The outer periphery of the inner cylinder (26) is set as a tapered part (33) near the filter assembly (25). The outer rotor output shaft (30) of the dual rotor motor rotates through the inner cylinder (26) away from the tapered atomizing disk (28) via a sealed rotating bearing and is then fixedly installed with a mounting post (31). Multiple fan blades (32) arranged in a circumferential array are fixedly installed on the outer periphery of the mounting post (31). The outer periphery of the inner cylinder (26) is fixedly connected to the inner wall of the outer cylinder (23) at a position near the tail end by a plurality of swirl blades (29) arranged in a circumferential array about the axis of the inner cylinder (26).

3. A road construction dust suppression device according to claim 2, characterized in that, The conical atomizing disk (28) has an umbrella-shaped conical structure. On the inner side of the conical atomizing disk (28), near the edge, there are multiple dispersing blocks (14) that are axially arrayed about the axis of the inner rotor output shaft (27). The end of the liquid supply pipe (16) located in the conical atomizing plate (28) is close to the inner end face of the conical atomizing plate (28).

4. A road construction dust suppression device according to claim 2, characterized in that, The filter assembly (25) includes a filter disc (34) that is detachably fixed to the tail end of the outer cylinder (23). The side of the filter disc (34) has multiple sets of rectangular array filter holes (35) arranged in a circumferential array about the axis of the filter disc (34). A motor (36) is fixedly installed at the center of the outer side of the filter disc (34). The output shaft of the motor (36) rotates through the filter disc (34) and is then fixedly installed with a second mounting column (38). A triangular prism (39) is fixedly installed on the periphery of the second mounting column (38) and is perpendicular to the axis of the second mounting column (38). Multiple sets of cleaning components (37) that are connected to the triangular prism (39) are fixedly installed on the inner side of the filter disc (34). The number of the multiple sets of cleaning components (37) is equal to the number of multiple rectangular array filter holes (35) and they are aligned one by one.

5. A road construction dust suppression device according to claim 4, characterized in that, The cleaning assembly (37) includes a linkage frame (41) aligned with the rectangular array of filter holes (35) at the corresponding position. Multiple insertion rods (44) aligned with multiple filter holes in the rectangular array of filter holes (35) are fixedly installed on the side of the linkage frame (41) near the filter disc (34). A contact rod (40) that cooperates with the triangular prism (39) is rotatably connected to the center position of one end of the linkage frame (41) near the axis of the filter disc (34). Both sides of the linkage frame (41) are fixedly installed with protrusions (42) near the end, and an elastic telescopic rod (43) is fixedly connected between the protrusions (42) and the side of the filter disc (34).

6. A road construction dust suppression device according to claim 2, characterized in that, The angle adjustment assembly includes a U-shaped mounting base (18) and an electric push rod (22). The U-shaped mounting base (18) is fixedly mounted on the top surface of the table (1). The outer cylinder (23) is located at the top position between the U-shaped mounting bases (18). The outer cylinder (23) is rotatably connected to both sides of the U-shaped mounting base (18) through the pin (19). The electric push rod (22) is set between the outer cylinder (23) and the table (1). The telescopic end of the electric push rod (22) is fixedly connected to the outer periphery of the pin of the first hinge seat (20). The other end of the electric push rod (22) is hinged to the top surface of the table (1) through the second hinge seat (21).

7. A road construction dust suppression device according to claim 2, characterized in that, The water supply assembly includes a water tank (5) fixedly installed on a support frame (4). An extension plate (6) is fixedly installed on one side of the water tank (5). A water pump (7) is fixedly installed on the extension plate (6). The water inlet of the water pump (7) extends into the water tank (5). A conduit (8) is fixedly connected to the water outlet of the water pump (7). A diversion pipe (9) fixedly installed on the table (1) is fixedly connected to the end of the conduit (8) away from the water pump (7). A plurality of liquid outlets (15) are provided around the diversion pipe (9) as many as the number of the multiple sets of dust suppression assemblies (13). A flexible conduit (17) is connected to the liquid outlet (15). The ends of the multiple flexible conduits (17) away from the liquid outlets (15) are respectively fixedly connected to the ends of the multiple liquid supply pipes (16) located outside the outer cylinder (23).

8. A road construction dust suppression device according to claim 1, characterized in that, A dust particle size sensor (10) electrically connected to the control panel (11) is installed at the front end of the tabletop (1).

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