Dust suppression device for construction sites

Abstract

The present invention discloses a dust suppression device for construction sites, specifically relating to the field of construction technology, comprising a cylinder, a column fixedly mounted in the middle of the upper end of the cylinder, a collection device mounted in the middle of the outer surface of the column, a spray device mounted on the top of the outer surface of the column, a water storage chamber, a movable chamber, an equipment chamber and an air suction chamber mounted in sequence from top to bottom inside the column, and a separator pipe fixedly mounted inside the cylinder. The dust suppression device for construction sites described in the present invention, while utilizing water mist to suppress dust in the environment of the construction site, also prevents the water mist from causing mud on the ground, thereby improving the environmental friendliness and safety of the construction site. At the same time, the sprayed water mist can also be collected and filtered for reuse, thereby avoiding waste of water resources. Recollecting the water mist can improve the utilization rate, making the device energy-saving and environmentally friendly, and more in line with the needs of current social development.

Description

Technical Field

[0001] The present invention relates to the field of construction technology, in particular to a dust suppression device for construction sites. Background Art

[0002] A large amount of cement and river sand will be stored at the construction site for mixing and use in construction. Moreover, the ground of the construction site is also sandy. Cement or river sand is easily blown up by the wind to produce dust. The sandy ground of the construction site will also bring up dust when vehicles pass by, forming dust. On the one hand, it will be inhaled by the construction workers on the construction site and endanger their health. On the other hand, if the dust is not controlled and allowed to spread, it will also harm the surrounding environment and affect the lives of surrounding residents. Therefore, it is necessary to use dust reduction equipment to absorb dust in the air and improve the air quality of the construction site.

[0003] Existing construction site dust reduction is mostly achieved by installing fog cannons and spraying water mist to reduce dust. However, this type of dust reduction has many problems. On the one hand, the water mist cannot be collected by the fog cannon, resulting in muddy ground, inconvenience for construction, and safety hazards. At the same time, the water mist method consumes a lot of water when used for a long time and is costly. Therefore, a dust reduction device for construction sites is needed. Summary of the Invention

[0004] The main purpose of the present invention is to provide a dust suppression device for construction sites, which can effectively solve the problems in the background art that spraying water mist causes muddy ground that is not conducive to construction and consumes a lot of water.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A dust suppression device for construction sites includes a cylinder, a column is fixedly installed in the middle of the upper end of the cylinder, a collecting device is installed in the middle of the outer surface of the column, a spray device is installed on the top of the outer surface of the column, a water storage chamber, an activity chamber, an equipment chamber and an air suction chamber are installed in the column from top to bottom, a separator is fixedly installed in the cylinder, the separator divides the internal chamber of the cylinder into a collecting chamber and an exhaust chamber distributed inside and outside, the bottom of the air suction chamber is connected to the top of the collecting chamber, a mounting plate is fixedly installed in the middle and upper part of the inner wall of the collecting chamber, and a mounting plate is opened in the middle of the mounting plate A first mounting port, a filter is installed inside the first mounting port, a plurality of second mounting ports connected to the exhaust chamber are opened in the middle and lower part of the inner wall of the collection chamber, a hydrophobic microporous membrane is installed in the second mounting port, a plurality of air inlet holes are opened in the side wall of the suction chamber from top to bottom, a high-pressure axial flow fan is fixedly installed at the bottom of the inner wall of the suction chamber, a plurality of exhaust ports are opened on the outer surface of the exhaust chamber, a honeycomb rectifying grid is fixedly installed at the bottom of the suction chamber, and a honeycomb rectifying grid is installed in front of the outlet to eliminate vortexes and turbulence, make the airflow uniform, and maximize the stability of the outlet speed The collecting device includes a motor, a mounting sleeve and an umbrella rib, the motor is fixedly installed in the equipment cavity, the output end of the motor extends through the active cavity and is fixedly installed with a screw, the inner wall of the active cavity is evenly provided with a plurality of limiting grooves, the mounting sleeve slides up and down on the outer surface of the column, the outer surface of the screw is threadedly connected to a driving block, and the outer surface of the driving block is evenly distributed and fixedly installed with a plurality of connecting plates, the connecting plates penetrate the limiting grooves and are fixedly connected to the mounting sleeves, the connecting plates are slidably connected to the limiting grooves, and the umbrella ribs are provided with a plurality of them, each of which is hinged The umbrella canopy is evenly distributed and rotatably installed on the middle and lower part of the outer surface of the column, and an umbrella canopy is fixedly installed between adjacent umbrella ribs. The outer surface of the mounting sleeve is rotatably connected to a plurality of linkage rods opposite to the umbrella ribs through a hinge, and the end of the linkage rod away from the mounting sleeve is hinged to the middle part of the umbrella rib; a fixing tube is fixedly installed on the upper end of the cylinder body, and the fixing tube is sleeved on the outside of the column, and a conical tube is fixedly installed on the upper end of the fixing tube, and the inner edge of the umbrella canopy is located inside the conical tube. A collecting groove is formed between the fixing tube and the column, and a through hole communicating with the bottom wall of the collecting groove is opened on the outer surface of the suction cavity.

[0007] Preferably, the spray device includes a plurality of transverse plates evenly distributed on the top of the outer surface of the column and a second water pump installed in the water storage chamber, the transverse plate is fixedly installed with a sector gear at one end close to the column, and a fixed plate is provided on both sides of the sector gear, the sector gear is rotatably installed between the two fixed plates by a rotating rod, one end of the fixed plate is fixedly connected to the outer surface of the column, and mounting plates are fixedly installed on both sides of the bottom of the transverse plate, a water spray pipe is fixedly installed between the two mounting plates, a plurality of nozzles are provided at the bottom of the water spray pipe, and a slide groove is provided at the end of the two fixed plates close to each other, and a tooth plate is slidably connected in the two slide grooves, the sector gear is meshed with the tooth plate, and a plurality of delivery pipes are fixedly installed at the output end of the second water pump, the delivery pipe passes through the column and is fixedly installed with a hose, and the hose is connected to the water spray pipe.

[0008] Preferably, the bottom of the tooth plate is fixedly connected to a support plate, and the bottom of the support plate is fixedly connected to the top of the mounting sleeve below.

[0009] Preferably, a first water pump is fixedly installed on the bottom wall of the collecting chamber, and a connecting pipe is fixedly installed on the output end of the first water pump. The upper end of the connecting pipe passes through the mounting plate and the cylinder and extends upward close to the surface of the column and then extends into the water storage chamber. The connecting pipe does not affect the rotation of the umbrella surface and the up and down movement of the mounting sleeve.

[0010] Preferably, the inner wall of the air suction chamber is provided with spiral guide ribs to guide the airflow to rotate downward, thereby utilizing centrifugal force to reduce boundary layer separation and reduce friction loss.

[0011] Preferably, the density of the air inlet holes on the surface of the pillars decreases from top to bottom, and the hole diameters also gradually decrease. In the top section, dense holes (e.g., 20 holes per meter, 8 mm diameter) allow a large amount of gas to enter from above, creating an initial high flow rate. In the middle section, the hole density is halved (10 holes per meter, 6 mm diameter) to replenish air flow while avoiding excessive dilution of downstream kinetic energy. In the bottom section, closed or minimized holes (5 holes per meter, 4 mm diameter) reduce end-gas interference and concentrate the outlet flow rate.

[0012] Preferably, a guide vane obliquely downward is installed in the middle of the air inlet to ensure that the direction of external air entering is consistent with the main airflow, thereby reducing turbulence caused by the lateral velocity component.

[0013] Preferably, a centrifugal fan is fixedly installed in the middle of the suction chamber to balance the pressure gradient and prevent insufficient upstream air flow speed, which affects the speed of external air entering the suction chamber and further affects the collection of water mist.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention discloses a dust suppression device for construction sites, which is provided with a collecting device. The collecting device is unfolded into an umbrella shape and is arranged under the spray device to collect the water mist sprayed by the spray device to prevent the water mist from falling on the ground and causing muddy ground after absorbing dust. At the same time, by arranging an air suction chamber, spiral guide ribs, air inlet holes, and a high-pressure axial flow fan, which cooperate with each other, a negative pressure suction force toward the center of the column can be generated, which can prompt the peripheral water mist to gather toward the middle, prevent the water mist from diffusing, and further improve the collection effect of the water mist. The collected water mist is filtered through a filter to filter the dust adsorbed by the water mist, and then the water mist is separated into gas and liquid through a hydrophobic microporous membrane. The water remains in the collection chamber and the gas is discharged to the outside. The water collected in the collection chamber is transported to the water storage chamber through a first water pump and a connecting pipe for reuse by the spray device. When the present invention uses water mist to reduce dust in the environment of the construction site, it also avoids the water mist from causing the ground to become muddy, thereby improving the environmental protection and construction safety of the construction environment of the construction site. At the same time, the sprayed water mist can be collected and filtered and reused, avoiding the waste of water resources. Re-collecting the water mist can improve the utilization rate, so that the device has the advantages of energy saving and environmental protection, and is more in line with the needs of current social development. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a cutaway schematic diagram of the present invention;

[0018] Figure 3 for Figure 1 A magnified schematic diagram of point A in the middle;

[0019] Figure 4 for Figure 2 A magnified schematic diagram of point B in the middle;

[0020] Figure 5 Schematic diagram of the detailed structure inside the suction cavity.

[0021] In the figure: 1, cylinder; 2, column; 3, spray device; 4, collection device; 5, high-pressure axial flow fan; 6, centrifugal fan; 7, separator tube; 8, mounting plate; 9, filter screen; 10, hydrophobic microporous membrane; 11, fixed tube; 12, tapered tube; 13, connecting tube; 14, support plate; 15, first water pump; 16, spiral guide rib; 17, honeycomb rectifier grid; 18, guide vane; 19, flexible solar panel; 41, motor; 42, screw; 43, drive block; 44, connecting plate; 45, mounting sleeve; 4 6. Linkage rod; 47. Umbrella rib; 48. Umbrella surface; 21. Intake chamber; 22. Equipment chamber; 23. Active chamber; 24. Water storage chamber; 101. Exhaust chamber; 102. Collecting chamber; 211. Air inlet; 212. Through hole; 103. Exhaust port; 81. First mounting port; 71. Second mounting port; 231. Restriction groove; 31. Fixing plate; 32. Horizontal plate; 33. Sector gear; 34. Tooth plate; 35. Mounting plate; 36. Spray pipe; 37. Hose; 38. Spray head; 39. Second water pump; 310. Delivery pipe. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See Figure 1 and Figure 2As shown, a dust suppression device for construction sites includes a cylinder 1, a column 2 is fixedly installed in the middle of the upper end of the cylinder 1, a collecting device 4 is installed in the middle of the outer surface of the column 2, a spray device 3 is installed on the top of the outer surface of the column 2, and a water storage chamber 24, an active chamber 23, an equipment chamber 22 and an air suction chamber 21 are installed in sequence from top to bottom inside the column 2, a separator pipe 7 is fixedly installed inside the cylinder 1, the separator pipe 7 divides the internal chamber of the cylinder 1 into a collecting chamber 102 and an exhaust chamber 101 distributed inside and outside, the bottom of the air suction chamber 21 is connected with the top of the collecting chamber 102, a mounting plate 8 is fixedly installed in the middle and upper part of the inner wall of the collecting chamber 102, a first mounting port 81 is opened in the middle of the mounting plate 8, a filter screen 9 is installed inside the first mounting port 81, a plurality of second mounting ports 71 connected with the exhaust chamber 101 are opened in the middle and lower part of the inner wall of the collecting chamber 102, a hydrophobic microporous membrane 10 is installed in the second mounting port 71, The side walls of the air intake chamber 21 are provided with a plurality of air inlet holes 211 from top to bottom, and a high-pressure axial flow fan 5 is fixedly installed at the bottom of the inner wall of the air intake chamber 21 to provide a strong negative pressure to attract the gas to flow downward and directly accelerate the outlet airflow. A plurality of exhaust ports 103 are provided on the outer surface of the exhaust chamber 101, and a honeycomb rectifier grid 17 is fixedly installed at the bottom of the air intake chamber 21. A fixed pipe 11 is fixedly installed at the upper end of the cylinder 1, and the fixed pipe 11 is sleeved on the outside of the column 2. A conical pipe 12 is fixedly installed on the upper end of the fixed pipe 11, and a collecting tank is formed between the fixed pipe 11 and the column 2. A through hole 212 communicating with the bottom wall of the collecting tank is provided on the outer surface of the air intake chamber 21. The water mist collected by the collecting device 4 is gathered into a water flow and collected in the collecting tank, and then enters the air intake chamber 21 through the through hole 212, and is then transported to the collecting chamber 102. An inspection port is provided on the cylinder 1 for maintaining the filter screen 9 and the hydrophobic microporous membrane 10.

[0024] Specifically, the honeycomb rectifying grid 17 adopts a gradual honeycomb structure, gradually reducing the aperture along the flow direction, and adopts a rotational alignment design to match the honeycomb axis with the downward spiral flow direction. At the same time, the honeycomb rectifying grid 17 is mirror polished to reduce the surface friction coefficient and maintain a high-speed core flow.

[0025] When in use, the spray device 3 is started to spray, so that the water mist combines with the dust in the air, increases the weight of the dust, and causes the dust to fall into the collecting device 4 below, ultimately achieving the purpose of dust removal and air purification, while preventing the ground from becoming muddy due to the water mist. The water mist with dust is then collected by the collecting device 4, and the high-pressure axial-flow fan 5 is started to provide a strong negative pressure to attract the gas to flow downward, and directly accelerate the outlet airflow, generating a negative pressure in the suction chamber 21, and the external water mist with dust enters the suction chamber 21 through the air inlet 211, and then enters the collecting chamber 102. The high-pressure water mist filters the dust in the water mist when passing through the filter 9, and then the clean water mist enters the bottom of the collecting chamber 102, and passes through the hydrophobic microporous membrane 10 under the action of the wind pressure generated by the high-pressure axial-flow fan 5. The liquid water cannot pass through the membrane pores due to surface tension, and forms droplets that are The air (N2, O2, etc.) is trapped on the surface of the membrane, and passes through the membrane pores under pressure to achieve gas-liquid separation, and then the separated gas is discharged to the outside through the exhaust port 103. The present invention collects the water mist sprayed by the spray device 3 through the collection device 4, and then, with the cooperation of the high-pressure axial fan 5, the dust and water mist generated at the construction site are collected into the suction chamber 21 through the air inlet 211, and then a preliminary solid-liquid separation is performed by setting a filter 9 to separate the dust and water mist. The water mist enters the bottom of the mounting plate 8, and then the water mist is separated into gas and liquid through the hydrophobic microporous membrane 10. The water remains at the bottom of the collection chamber 102, and the rest is discharged to the outside, completing the dust reduction work at the construction site. At the same time, it avoids the muddy ground due to water mist, performs dust reduction and adsorption on the construction environment of the construction site, and improves the environmental protection and construction safety of the construction environment of the construction site.

[0026] See Figure 2 and Figure 4 As shown, the collecting device 4 includes a motor 41, a mounting sleeve 45 and an umbrella rib 47. The motor 41 is fixedly installed in the equipment cavity 22. The output end of the motor 41 extends through the active cavity 23 and is fixedly installed with a screw 42. The inner wall of the active cavity 23 is evenly provided with a plurality of limiting grooves 231. The mounting sleeve 45 slides up and down on the outer surface of the column 2. The outer surface of the screw 42 is threadedly connected to the driving block 43. The outer surface of the driving block 43 is evenly distributed and fixedly installed with a plurality of connecting plates 44. The connecting plates 44 pass through the limiting grooves. 231 and is fixedly connected to the mounting sleeve 45, the connecting plate 44 is slidably connected to the limiting groove 231, a plurality of ribs 47 are provided, and each rib 47 is evenly distributed and rotatably mounted on the middle and lower part of the outer surface of the column 2 through a hinge, and an umbrella cover 48 is fixedly mounted between adjacent ribs 47, and the inner edge of the umbrella cover 48 is located inside the conical tube 12. The outer surface of the mounting sleeve 45 is rotatably connected to a plurality of linkage rods 46 opposite to the ribs 47 through a hinge, and the end of the linkage rod 46 away from the mounting sleeve 45 is hinged to the middle part of the rib 47.

[0027] During use, the motor 41 starts, driving the screw 42 to rotate, the screw 42 drives the driving block 43 to move downward, the driving block 43 drives the connecting plate 44 to move downward, the connecting plate 44 drives the installation sleeve 45 to move downward, the installation sleeve 45 drives the linkage rod 46 to move downward, and the linkage rod 46 drives the umbrella ribs 47 to flip outward while moving downward, thereby driving the umbrella surface 48 to open, forming an umbrella-shaped structure, which collects the water mist and dust carried by the upper spray device 3 when it is working, and prevents the water mist from falling to the ground and causing the ground to be wet. At the same time, the umbrella-shaped structure can also form a uniform velocity field to prevent dust particles from escaping. When not in use, the umbrella surface 48 can be folded up, thereby reducing the volume of the entire device and facilitating later transportation and storage.

[0028] See Figure 2 and Figure 3 As shown, the spray device 3 includes a plurality of horizontal plates 32 evenly distributed on the top of the outer surface of the column 2 and a second water pump 39 installed in the water storage chamber 24. The horizontal plate 32 is fixedly installed with a sector gear 33 at one end close to the column 2. A fixing plate 31 is provided on both sides of the sector gear 33. The sector gear 33 is rotatably installed between the two fixing plates 31 through a rotating rod. One end of the fixing plate 31 is fixedly connected to the outer surface of the column 2. The two sides of the bottom of the horizontal plate 32 are fixedly installed with a mounting plate 35. A fixing plate 35 is fixedly installed between the two mounting plates 35. A water spray pipe 36 is provided with multiple nozzles 38 at the bottom of the water spray pipe 36. A slide groove is provided at one end of the two fixed plates 31 close to each other. A tooth plate 34 is slidably connected in the two slide grooves. The sector gear 33 is engaged with the tooth plate 34. A plurality of delivery pipes 310 are fixedly installed at the output end of the second water pump 39. The delivery pipe 310 passes through the column 2 and is fixedly installed with a hose 37. The hose 37 is connected to the water spray pipe 36. The bottom of the tooth plate 34 is fixedly connected to the support plate 14. The bottom of the support plate 14 is fixedly connected to the top of the mounting sleeve 45 below.

[0029] When in use, in the initial state, the cross plate 32 is in a vertical state. During the opening of the collecting device 4, the mounting sleeve 45 moves downward, driving the support plate 14 to move downward, and the support plate 14 drives the tooth plate 34 to move downward. The downward movement of the tooth plate 34 drives the fan gear to rotate, thereby driving the cross plate 32 to rotate and expand outward. When the mounting sleeve 45 moves to the bottom, the cross plate 32 rotates from a vertical state to a horizontal state. The expansion and folding of the cross plate 32 and the folding of the umbrella surface 48 do not conflict, thereby expanding the spraying range of the nozzle 38, thereby expanding the dust reduction range and improving the dust reduction efficiency. Then the second water pump 39 transports the water in the water storage chamber 24 to the hose 37 through the water pipe, and the hose 37 transports the water to the water spray pipe 36, and then sprays water mist from the nozzle 38 at the bottom of the water spray pipe 36, so that the water mist combines with the dust in the air, increases the weight of the dust, and causes the dust to fall into the collecting device 4 below.

[0030] See Figure 2 As shown, a first water pump 15 is fixedly installed on the bottom wall of the collecting chamber 102, and a connecting pipe 13 is fixedly installed on the output end of the first water pump 15. The upper end of the connecting pipe 13 passes through the mounting plate 8 and the cylinder 1 and extends upward close to the surface of the column 2 and then passes through and extends into the water storage chamber 24. The connecting pipe 13 does not affect the rotation of the umbrella surface 48 and the up and down movement of the mounting sleeve 45. The water mist is then separated into gas and liquid through the hydrophobic microporous membrane 10, and the water remains in the collecting chamber 102. It is then re-delivered to the water storage chamber 24 for reuse through the first water pump 15, which effectively avoids the waste of water resources. Re-collecting the water mist can improve utilization and reduce waste, so that the device has the advantages of energy saving and environmental protection, and is more in line with the needs of current social development.

[0031] See Figure 5 As shown, the inner wall of the suction cavity 21 is installed with a spiral guide rib 16, which is streamlined and welded or embedded on the inner wall of the suction cavity 21. The spiral structure guides the airflow to rotate, generates centrifugal force, pushes the airflow to the center of the pipe, reduces boundary layer separation, reduces wall friction resistance, and maintains high-speed core flow.

[0032] See Figure 5 As shown, the density of the air inlet holes 211 on the surface of the pillar 2 decreases from top to bottom, and the hole diameter also gradually decreases. A preferred embodiment provides a top section with dense openings (e.g., 15-20 holes per meter, 8 mm diameter) to allow a large amount of gas to enter from above, resulting in a high initial flow rate. In the middle section, the opening density is halved (8-10 holes per meter, 6 mm diameter) to replenish airflow while avoiding excessive dilution of downstream kinetic energy. In the bottom section, the openings are minimized (3-5 holes per meter, 4 mm diameter) to reduce end-gas interference and concentrate the outlet flow rate.

[0033] See Figure 5 As shown, a downward-slanting guide vane 18 is installed in the middle of the air inlet 211 to ensure that the direction of external air entering is consistent with the main airflow and reduce turbulence caused by the lateral velocity component.

[0034] See Figure 2 As shown, a centrifugal fan 6 is fixedly installed in the middle of the suction chamber 21 to balance the pressure gradient and prevent insufficient upstream air flow speed, which affects the speed of external air entering the suction chamber 21 and further affects the collection of water mist.

[0035] See Figure 1 As shown, a flexible solar cell panel 19 is provided on the surface of the column 2 to provide auxiliary power for the first water pump 15, the second water pump 39, the fan, etc., thereby reducing external energy consumption and improving the applicability of the device in an off-grid environment.

[0036] The working principle of the present invention is as follows: when in use, the motor 41 is started, driving the screw 42 to rotate, the screw 42 drives the driving block 43 to move downward, the driving block 43 drives the connecting plate 44 to move downward, the connecting plate 44 drives the installation sleeve 45 to move downward, the installation sleeve 45 drives the linkage rod 46 to move downward, and the linkage rod 46 moves downward while driving the umbrella ribs 47 to flip outward, thereby driving the umbrella surface 48 to open, forming an umbrella-shaped structure, the installation sleeve 45 moves downward while driving the support plate 14 to move downward, the support plate 14 drives the tooth plate 34 to move downward, and the tooth plate 34 moves downward. The fan gear is driven to rotate, thereby driving the horizontal plate 32 to rotate and expand outward. When the installation sleeve 45 moves to the bottom, the horizontal plate 32 rotates from the vertical state to the horizontal state. The second water pump 39 transports the water in the water storage chamber 24 to the hose 37 through the water pipe. The hose 37 transports the water to the water spray pipe 36, and then sprays water mist from the nozzle 38 at the bottom of the water spray pipe 36, so that the water mist combines with the dust in the air, increases the weight of the dust, and causes the dust to fall onto the umbrella-shaped umbrella surface 48 below. At the same time, the high-pressure axial flow fan 5 is started, providing a strong negative pressure to attract the gas to flow downward, and directly The outlet airflow is then accelerated, and negative pressure is generated in the air intake chamber 21. The sprayed water mist will gather in the middle, thereby preventing the water mist from spreading outward, and then enter the air intake chamber 21 through the provided air inlet hole 211, and then enter the collecting chamber 102 driven by the high-pressure axial flow fan. When the high-pressure water mist passes through the filter 9, the filter 9 filters the dust in the water mist, and then the clean water mist enters the bottom of the collecting chamber 102, and passes through the hydrophobic microporous membrane 10 under the action of the wind pressure generated by the high-pressure axial flow fan 5. The liquid water cannot pass through the membrane pores due to surface tension, and forms droplets that are trapped on the membrane surface and collected to the collecting chamber. At the bottom of the cavity 102, air passes through the membrane holes under pressure to achieve gas-liquid separation, and then is discharged to the outside through the exhaust port 103. The water collected in the collection cavity 102 is re-transported to the water storage cavity 24 through the first water pump 15 for use in the spray device 3. The water resources can be reused, so that the device has the advantages of energy saving and environmental protection, which is more in line with the needs of current social development. While completing the dust reduction work at the construction site, it avoids the ground from becoming muddy due to water mist, and performs dust reduction and adsorption on the construction environment of the construction site, thereby improving the environmental protection and construction safety of the construction environment of the construction site.

[0037] The present invention realizes the collection, solid-liquid separation and gas-liquid separation of water mist through an umbrella-shaped collecting device 4, a filter screen 9 and a hydrophobic microporous membrane 10, thereby solving the problems of muddy ground and waste of water resources caused by traditional fog cannon dust reduction, and is outstandingly environmentally friendly; a water recycling mechanism (water storage chamber 24 → spray device 3 → collection chamber 102 → water storage chamber 24) is provided to form a closed loop, which significantly reduces water resource consumption; the spiral guide ribs 16 and the gradient-distributed air inlet holes 211 (density and aperture decrease) in the suction chamber 21 are combined with the honeycomb rectifying grid 17 to reduce turbulence and improve the negative pressure adsorption efficiency; the high-pressure axial flow fan 5 and the centrifugal fan 6 work together to balance the airflow pressure and enhance the water mist gathering effect; the umbrella-shaped collecting device 4 is automatically unfolded / folded by the screw 42-drive block 43-linkage rod 46, which saves space and is easy to operate; the spray device 3 is linked with the tooth plate 34 through the sector gear 33, and the angle of the nozzle 38 is synchronously adjusted as the umbrella surface 48 unfolds, thereby expanding the dust reduction range.

[0038] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust suppression device for a construction site, comprising a cylinder (1), characterized in that: A column (2) is fixedly mounted in the middle of the upper end of the cylinder (1), a collecting device (4) is mounted in the middle of the outer surface of the column (2), a spray device (3) is mounted on the top of the outer surface of the column (2), a water storage chamber (24), a movable chamber (23), an equipment chamber (22) and an air suction chamber (21) are mounted in sequence from top to bottom inside the column (2), a separating pipe (7) is fixedly mounted inside the cylinder (1), the separating pipe (7) separates the inner chamber of the cylinder (1) into a collecting chamber (102) and an exhaust chamber (101) distributed inside and outside, the bottom of the air suction chamber (21) is connected to the top of the collecting chamber (102), and the collecting chamber (101) is connected to the exhaust chamber (102). 2) A mounting plate (8) is fixedly installed at the middle upper portion of the inner wall, a first mounting opening (81) is provided at the middle portion of the mounting plate (8), a filter screen (9) is installed inside the first mounting opening (81), a plurality of second mounting openings (71) communicating with the exhaust chamber (101) are provided at the middle lower portion of the inner wall of the collection chamber (102), a hydrophobic microporous membrane (10) is installed in the second mounting opening (71), a plurality of air inlet holes (211) are sequentially provided on the side wall of the air intake chamber (21) from top to bottom, a high-pressure axial flow fan (5) is fixedly installed at the bottom of the inner wall of the air intake chamber (21), and a plurality of exhaust openings (103) are provided on the outer surface of the exhaust chamber (101) The bottom of the air intake cavity (21) is fixedly mounted with a honeycomb rectifier grid (17); the collecting device (4) comprises a motor (41), a mounting sleeve (45) and an umbrella rib (47); the motor (41) is fixedly mounted in the equipment cavity (22); the output end of the motor (41) extends through the active cavity (23) and is fixedly mounted with a screw (42); the inner wall of the active cavity (23) is evenly provided with a plurality of limiting grooves (231); the mounting sleeve (45) slides up and down on the outer surface of the column (2); the outer surface of the screw (42) is threadedly connected with a driving block (43); the outer surface of the driving block (43) is evenly distributed with fixed mounting holes (231). A plurality of connecting plates (44) are installed, the connecting plates (44) pass through the limiting groove (231) and are fixedly connected to the mounting sleeve (45), the connecting plates (44) are slidably connected to the limiting groove (231), a plurality of umbrella ribs (47) are provided, each umbrella rib (47) is evenly distributed and rotatably mounted on the middle and lower part of the outer surface of the column (2) through a hinge, and an umbrella surface (48) is fixedly mounted between adjacent umbrella ribs (47), and the outer surface of the mounting sleeve (45) is rotatably connected to a plurality of linkage rods (46) opposite to the umbrella ribs (47) through a hinge, and one end of the linkage rod (46) away from the mounting sleeve (45) is hinged to the middle part of the umbrella rib (47);A fixed tube (11) is fixedly mounted on the upper end of the cylinder (1), the fixed tube (11) being sleeved on the outside of the column (2), a conical tube (12) being fixedly mounted on the upper end of the fixed tube (11), the inner edge of the umbrella surface (48) being located inside the conical tube (12), a collection trough being formed between the fixed tube (11) and the column (2), and a through hole (212) communicating with the bottom wall of the collection trough being opened on the outer surface of the suction cavity (21).

2. A dust suppression device for construction sites according to claim 1, characterized in that: The spray device (3) comprises a plurality of transverse plates (32) evenly distributed on the top of the outer surface of the column (2) and a second water pump (39) installed in the water storage chamber (24), wherein a sector gear (33) is fixedly installed on one end of the transverse plate (32) close to the column (2), and a fixing plate (31) is provided on both sides of the sector gear (33), and the sector gear (33) is rotatably installed between the two fixing plates (31) through a rotating rod, and one end of the fixing plate (31) is fixedly connected to the outer surface of the column (2), and a mounting plate ( 35), a water spray pipe (36) is fixedly installed between the two mounting plates (35), and a plurality of nozzles (38) are provided at the bottom of the water spray pipe (36). A sliding groove is provided at one end of the two fixing plates (31) close to each other, and a tooth plate (34) is slidably connected in the two sliding grooves. The sector gear (33) is meshed with the tooth plate (34), and a plurality of delivery pipes (310) are fixedly installed at the output end of the second water pump (39). The delivery pipe (310) passes through the column (2) and is fixedly installed with a hose (37), and the hose (37) is connected to the water spray pipe (36).

3. A dust suppression device for construction sites according to claim 2, characterized in that: The bottom of the tooth plate (34) is fixedly connected to a support plate (14), and the bottom of the support plate (14) is fixedly connected to the top of the mounting sleeve (45) below.

4. The dust suppression device for construction sites according to claim 1, characterized in that: A first water pump (15) is fixedly mounted on the bottom wall of the collecting chamber (102), and a connecting pipe (13) is fixedly mounted on the output end of the first water pump (15). The upper end of the connecting pipe (13) passes through the mounting plate (8) and the cylinder (1), closely adheres to the surface of the column (2), and then extends upward and into the water storage chamber (24). The connecting pipe (13) does not affect the rotation of the umbrella cover (48) and the up and down movement of the mounting sleeve (45).

5. The dust suppression device for construction sites according to claim 1, characterized in that: The inner wall of the air suction cavity (21) is provided with spiral guide ribs (16).

6. The dust suppression device for construction sites according to claim 1, characterized in that: The density of the air inlet holes (211) provided on the surface of the pillar (2) decreases from top to bottom, and the hole diameters also gradually decrease.

7. The dust suppression device for construction sites according to claim 1, characterized in that: A guide plate (18) is installed in the middle of the air inlet (211) obliquely downward.

8. The dust suppression device for construction sites according to claim 1, characterized in that: A centrifugal fan (6) is fixedly installed in the middle of the air suction cavity (21).

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