Building construction dust reducing device

Abstract

The utility model discloses a building construction dust falling device, including mobile seat and setting brake trolley in its bottom four corners, mobile seat one side fixedly connected with the push rod of cooperation brake trolley movement, mobile seat top center fixedly connected with water tank, water tank top center is equipped with ring sleeve, ring sleeve top fixedly connected with annular shell, annular shell top fixedly connected with shunt shell. This device has the advantages of flexible adjustment spraying range, good dust falling effect, the water pipe can move along the radius direction of annular shell, realizes the dynamic adjustment of spraying range, adapts to different site demand, multiple water pipes and shower nozzle combination, forms annular three -dimensional spraying structure, improves dust falling efficiency, uses the corrugated pipe connection water pipe and shunt shell, still can continue to supply water in the moving process of water pipe, multiple shower nozzle and annular layout, can realize 360 no dead angle spraying, enhances dust falling effect.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a dust suppression device for building construction. Background Technology

[0002] Construction dust suppression devices are equipment or devices used to reduce dust at construction sites. They aim to improve the working environment, protect workers' health, and reduce the impact on the surrounding environment. Spray dust suppression is one of the common methods. It uses high pressure to atomize water into tiny particles, which are then sprayed into the air to capture dust, increasing its weight so that it falls back to the ground.

[0003] However, the flexibility of existing dust suppression devices is not ideal. Due to the design and power limitations of the equipment, some dust suppression devices can only cover a fixed area. For large-area or irregularly shaped construction sites, it may be necessary to install multiple devices or move them frequently, which increases costs and operational complexity. Utility Model Content

[0004] The purpose of this utility model is to provide a dust suppression device for construction sites, which has the advantages of flexible adjustment of the spray range and good dust suppression effect. The water spray pipe can move along the radius of the annular shell to realize dynamic adjustment of the spray range and adapt to the needs of different sites. Multiple water spray pipes and nozzles are combined to form an annular three-dimensional spray structure to improve dust suppression efficiency. Corrugated pipes are used to connect the water spray pipes and the diversion shell to ensure that the water spray pipes can continue to supply water during movement. The multiple nozzles and annular layout can achieve 360° spraying without dead angles and enhance the dust suppression effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dust suppression device for construction, comprising a movable base and brake casters disposed at its four bottom corners, wherein a push rod is fixedly connected to one side of the movable base to cooperate with the movement of the brake casters.

[0006] A water tank is fixedly connected to the top center of the movable base. An annular sleeve is provided at the top center of the water tank. An annular shell is fixedly connected to the top of the annular sleeve. A diverter shell is fixedly connected to the top of the annular shell. At least four rectangular shells are fixedly connected in a circumferential array on the surface of the annular shell. A first water spray pipe is provided below the bottom of each of the four rectangular shells. At least four second water spray pipes are arranged in a circumferential array on the surface of the annular shell. The four first water spray pipes and the four second water spray pipes are spaced apart on the circumferential surface of the annular shell. The moving path of the four first water spray pipes and the four second water spray pipes is from the center of the annular shell to its circumference. Multiple high-pressure nozzles are fixedly connected to the bottom of each of the four first water spray pipes and the four second water spray pipes at equal intervals. A second corrugated pipe is fixedly connected to one end of each of the four first water spray pipes and the four second water spray pipes near the annular shell. The ends of the eight second corrugated pipes away from the first water spray pipes and the second water spray pipes are fixedly connected to the circumferential surface of the diverter shell.

[0007] As a preferred embodiment of the dust suppression device for construction work according to this utility model, a water pump is fixedly connected to one side of the top of the water tank, a first corrugated pipe is fixedly connected to the water outlet end of the water pump, the end of the first corrugated pipe away from the water pump is fixedly connected to the top of the diversion shell, a support shell is fixedly connected to the bottom of the annular sleeve, the bottom of the support shell is fixedly connected to the center of the top of the water tank, and a controller is fixedly connected to the front surface of the water tank.

[0008] As a preferred embodiment of the dust suppression device for construction work according to this utility model, a water supply pipe is fixedly connected to the other side of the top of the water tank, a water pump is fixedly connected to the water pump's pumping end, the end of the water pump extending away from the water pump extends to the lower part of the water tank and is fixedly connected thereto, and a vertically arranged lifting threaded rod is rotatably connected inside the annular sleeve, the bottom of the lifting threaded rod extending to the inside of the support shell and rotatably connected thereto.

[0009] As a preferred embodiment of the dust suppression device for construction work according to this utility model, a power motor is fixedly connected to the bottom of the inner wall of the support shell, the output shaft of the power motor is fixedly connected to the bottom of the lifting threaded rod, at least four moving grooves are formed in a circumferential array on the surface of the lifting threaded rod, the top of the lifting threaded rod passes through the top of the annular sleeve and extends into the interior of the annular shell and is rotatably connected thereto, a lifting plate is threadedly connected to the inner surface of the lifting threaded rod located in the annular sleeve, a guide rod is fixedly connected between the top and bottom of the inner wall of the annular sleeve, and the lifting plate and the guide rod are slidably connected.

[0010] As a preferred embodiment of the dust suppression device for construction work according to this utility model, the lifting plate has at least four connecting rods fixedly connected in a circumferential array on its surface. The four connecting rods extend to the outside of the annular sleeve and are slidably connected to the inner wall of the moving groove. The four connecting rods are rotatably connected to an upwardly inclined fixed sleeve at one end outside the annular sleeve. Telescopic rods are slidably connected inside the four fixed sleeves. The top end of each of the four telescopic rods is rotatably connected to a second water spray pipe.

[0011] As a preferred embodiment of the dust suppression device for construction work according to this utility model, each of the four No. 2 water spray pipes is slidably connected to a crossbar at its top, and each of the four crossbars is fixedly connected to an L-shaped plate at one end away from each other. The crossbars and L-shaped plates are fixedly connected to the circumferential surface of the annular shell at one end close to each other. The lifting threaded rod is fixedly fitted with a conical toothed ring on the inner surface of the annular shell.

[0012] As a preferred embodiment of the dust suppression device for construction work according to this utility model, the bottom of the bevel gear ring is rotatably connected to the bottom of the inner wall of the annular shell, and four rectangular shells arranged in a circumferential array are fixedly connected to the surface of the annular shell. The four rectangular shells are staggered with the four crossbars. The top of the bevel gear ring is meshed with four driven bevel gears arranged in a circumferential array, and the inner walls of the four driven bevel gears are all fixedly connected with horizontally threaded rods.

[0013] As a preferred embodiment of the dust suppression device for construction work according to this utility model, the four horizontal threaded rods extend into the rectangular shell from the end away from the driven bevel gear and are rotatably connected thereto. The four horizontal threaded rods are rotatably connected to the side of the rectangular shell away from the inner wall of the annular shell from the end away from the driven bevel gear. Each of the four horizontal threaded rods is threadedly connected to a movable sleeve inside the four rectangular shells.

[0014] As a preferred embodiment of the dust suppression device for construction work according to this utility model, a limiting rod is fixedly connected between the inner walls of the annular shell and the four rectangular shells, and the movable sleeve is slidably connected to the limiting rod. Each of the four rectangular shells has an opening at its bottom, and a fixing rod is fixedly connected to the bottom of each of the four movable sleeves. The bottom of the fixing rod extends to below the bottom of the rectangular shell and is fixedly connected to a No. 1 water spray pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses a power motor to provide the initial driving force, which is transmitted to the upper bevel gear ring through a lifting threaded rod. The bevel gear ring drives four driven bevel gears to rotate, and the four driven bevel gears drive the horizontal threaded rod to rotate synchronously. The synchronous rotation of the horizontal threaded rod drives the moving sleeve to slide along the limiting rod (moving left and right). The moving sleeve drives the fixed rod and the first water spray pipe to move outward or inward. By having the first water spray pipe and the second water spray pipe move outward or inward at the same time, the dust suppression coverage area can be expanded or reduced.

[0017] 2. This utility model draws water from the water tank after the water pump is started. The water flows through the water pump, the first corrugated pipe, and the distribution shell. The distribution shell distributes the water flow to eight second corrugated pipes. The second corrugated pipes are connected to four first spray pipes and four second spray pipes respectively. The high-pressure nozzles on the first and second spray pipes spray water simultaneously, atomizing the water and spraying it out to ensure that the water mist can fully capture dust particles in the air. Attached Figure Description

[0018] Figure 1 This is a three-dimensional drawing of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the spray assembly of this utility model.

[0021] In the diagram: 1. Movable seat; 2. Brake caster; 3. Push rod; 4. Water tank; 5. Water inlet pipe; 6. Water pump; 7. Water outlet pipe; 8. No. 1 corrugated pipe; 9. Diverter shell; 10. Annular sleeve; 11. Movable groove; 12. Lifting threaded rod; 13. Support shell; 14. Power motor; 15. Lifting plate; 16. Guide rod; 17. Annular shell; 18. Bevel gear ring; 19. Driven bevel gear; 20. Rectangular shell; 21. Horizontal threaded rod; 22. Movable sleeve; 220. Fixed rod; 23. Limiting rod; 24. No. 1 spray pipe; 25. High-pressure nozzle; 26. Connecting rod; 27. Fixed sleeve; 28. Telescopic rod; 29. ​​No. 2 spray pipe; 30. Crossbar; 31. L-shaped plate; 32. No. 2 corrugated pipe; 33. Controller. Detailed Implementation

[0022] Please see Figures 1-3 A dust suppression device for construction includes a movable base 1 and brake casters 2 located at the four corners of its bottom. A push rod 3 is fixedly connected to one side of the movable base 1 to move in coordination with the brake casters 2.

[0023] Furthermore, a water tank 4 is fixedly connected to the top center of the movable seat 1. An annular sleeve 10 is provided at the top center of the water tank 4. An annular shell 17 is fixedly connected to the top of the annular sleeve 10. A diversion shell 9 is fixedly connected to the top of the annular shell 17. At least four rectangular shells 20 are fixedly connected in a circumferential array on the surface of the annular shell 17. A first water spray pipe 24 is provided below the bottom of each of the four rectangular shells 20. At least four second water spray pipes 29 are arranged in a circumferential array on the surface of the annular shell 17. The four first water spray pipes 24 and the four second water spray pipes 29 are spaced apart on the annular shell. The four No. 1 water spray pipes 24 and the four No. 2 water spray pipes 29 on the circumferential surface of the annular shell 17 move from the center of the annular shell 17 to its circumference. The bottom of the four No. 1 water spray pipes 24 and the four No. 2 water spray pipes 29 are fixedly connected to multiple high-pressure nozzles 25 arranged at equal intervals. The end of the four No. 1 water spray pipes 24 and the four No. 2 water spray pipes 29 near the annular shell 17 is fixedly connected to a No. 2 corrugated pipe 32. The end of the eight No. 2 corrugated pipes 32 away from the No. 1 water spray pipes 24 and the No. 2 water spray pipes 29 is fixedly connected to the circumferential surface of the diversion shell 9.

[0024] The mobile base 1 is equipped with casters with brakes at its four corners, facilitating flexible movement and positioning of the equipment on the construction site. A push rod 3 is fixed to one side of the mobile base 1, allowing operators to easily move the device. A water tank 4 is located at the center of the top of the mobile base 1, storing spray water or dust suppression liquid. The water tank 4 provides water supply for the entire spraying device. An annular sleeve 10 is fixedly connected to the center of the top of the water tank 4. A diverter shell 9 is fixedly connected to the top of the annular shell 17, distributing water from the main water supply pipe to each spray pipe. At least four rectangular shells 20 are arranged in a circular array on the surface of the annular shell 17. Each rectangular shell 20 has a first water spray pipe 24 below it. The first water spray pipe 24 and the second water spray pipe 29 are evenly distributed on the outer circumference of the annular shell 17 and are arranged alternately. The first water spray pipe 24 and the second water spray pipe 29 can both extend outward from the center of the annular shell 17 to expand the spraying area. The first water spray pipe 24 and the second water spray pipe 29 are provided with multiple high-pressure nozzles 25 that are evenly distributed below them to achieve efficient atomization and dust suppression. The second corrugated pipe 32 is designed to allow the first water spray pipe 24 and the second water spray pipe 29 to maintain a sealed water supply during movement, and has good extensibility and flexible connection capabilities.

[0025] Furthermore, a water pump 6 is fixedly connected to one side of the top of the water tank 4, and a first corrugated pipe 8 is fixedly connected to the outlet end of the water pump 6. The end of the first corrugated pipe 8 away from the water pump 6 is fixedly connected to the top of the diversion shell 9. A support shell 13 is fixedly connected to the bottom of the annular sleeve 10. The bottom of the support shell 13 is fixedly connected to the center of the top of the water tank 4. A controller 33 is fixedly connected to the front surface of the water tank 4.

[0026] Furthermore, a water inlet pipe 5 is fixedly connected to the other side of the top of the water tank 4, and a water pump 6 is fixedly connected to the water pump 6 with a water pump pipe 7. The end of the water pump pipe 7 away from the water pump 6 extends into the lower part of the water tank 4 and is fixedly connected thereto. A vertically arranged lifting threaded rod 12 is rotatably connected inside the annular sleeve 10. The bottom of the lifting threaded rod 12 extends into the support shell 13 and is rotatably connected thereto.

[0027] Water tank 4 stores clean water or a mixture. After the controller 33 is started, the water pump 6 starts working and draws water from the bottom of water tank 4 through the water pipe 7. The pressurized water flows through the first corrugated pipe 8 to the distribution shell 9. The distribution shell 9 evenly distributes the water flow to multiple second corrugated pipes 32, and then delivers it to the first spray pipe 24 and the second spray pipe 29 respectively. The high-pressure nozzles 25 on the first spray pipe 24 and the second spray pipe 29 atomize the water and spray it out to form a covering dust suppression. The first spray pipe 24 and the second spray pipe 29 can slide radially along the annular shell 17 as needed to adjust the spray radius. The controller 33 monitors the status of the device in real time and can adjust it remotely or automatically when necessary.

[0028] Furthermore, a power motor 14 is fixedly connected to the bottom of the inner wall of the support shell 13. The output shaft of the power motor 14 is fixedly connected to the bottom of the lifting threaded rod 12. The surface of the lifting threaded rod 12 is provided with at least four moving slots 11 in a circumferential array. The top of the lifting threaded rod 12 passes through the top of the annular sleeve 10 and extends into the interior of the annular shell 17 and is rotatably connected thereto. A lifting plate 15 is threadedly connected to the inner surface of the lifting threaded rod 12 on the annular sleeve 10. A guide rod 16 is fixedly connected between the top and bottom of the inner wall of the annular sleeve 10. The lifting plate 15 and the guide rod 16 are slidably connected.

[0029] Furthermore, at least four connecting rods 26 are fixedly connected in a circumferential array on the surface of the lifting plate 15. The four connecting rods 26 extend to the outside of the annular sleeve 10 and are slidably connected to the inner wall of the moving groove 11. The four connecting rods 26 are rotatably connected to an upwardly inclined fixed sleeve 27 at one end outside the annular sleeve 10. Telescopic rods 28 are slidably connected inside the four fixed sleeves 27. The top end of each of the four telescopic rods 28 is rotatably connected to a second water spray pipe 29.

[0030] When the power motor 14 is started, it drives the lifting threaded rod 12 to rotate. The lifting plate 15 moves up and down along the guide rod 16 due to the thread action. The connecting rod 26 moves up and down with the lifting plate 15 and slides in the moving groove 11, driving the fixed sleeve 27 to move upward. The fixed sleeve 27 pushes the telescopic rod 28 to extend or retract, thereby changing the coverage radius of the second water spray pipe 29. The high-pressure nozzle 25 on the second water spray pipe 29 works synchronously to spray water atomized, achieving a dust suppression effect with dynamic range adjustment. The controller 33 can set different lifting positions to correspond to different spraying areas to meet the needs of different scenarios.

[0031] Furthermore, each of the four No. 2 water spray pipes 29 is slidably connected to a crossbar 30 at its top. Each of the four crossbars 30 is fixedly connected to an L-shaped plate 31 at one end away from each other. The crossbars 30 and L-shaped plates 31 are fixedly connected to the circumferential surface of the annular shell 17 at one end close to each other. A conical toothed ring 18 is fixedly sleeved on the inner surface of the annular shell 17.

[0032] Furthermore, the bottom of the bevel ring 18 is rotatably connected to the bottom of the inner wall of the annular shell 17. Four rectangular shells 20 arranged in a circumferential array are fixedly connected to the surface of the annular shell 17. The four rectangular shells 20 are staggered with the four crossbars 30. The top of the bevel ring 18 is meshed with four driven bevel gears 19 arranged in a circumferential array. The inner walls of the four driven bevel gears 19 are all fixedly connected with horizontally threaded rods 21.

[0033] Furthermore, the four horizontal threaded rods 21 extend into the rectangular shell 20 from the end away from the driven bevel gear 19 and are rotatably connected thereto. The four horizontal threaded rods 21 are rotatably connected to the side of the rectangular shell 20 away from the inner wall of the annular shell 17. Each of the four horizontal threaded rods 21 is threadedly connected to a movable sleeve 22 inside the four rectangular shells 20.

[0034] Furthermore, a limiting rod 23 is fixedly connected between the inner walls of the annular shell 17 and the four rectangular shells 20. The movable sleeve 22 is slidably connected to the limiting rod 23. The bottom of each of the four rectangular shells 20 is provided with an opening. The bottom of each of the four movable sleeves 22 is fixedly connected with a fixing rod 220. The bottom of the fixing rod 220 extends to the bottom of the rectangular shell 20 and is fixedly connected to a first spray pipe 24.

[0035] The entire device is powered by a motor 14, which transmits the power to the upper bevel ring 18 via a lifting threaded rod 12. The bevel ring 18 drives four driven bevel gears 19 to rotate, which in turn drives the horizontal threaded rod 21 to rotate synchronously. The synchronous rotation of the horizontal threaded rod 21 causes the movable sleeve 22 to slide (move left and right) along the limiting rod 23. The movable sleeve 22 causes the fixed rod 220 and the first water spray pipe 24 to move outward or inward. The first water spray pipe 24 and the second water spray pipe 29 move outward or inward simultaneously, expanding or shrinking the dust suppression coverage area.

[0036] The operator starts the equipment via controller 33. Controller 33 sends a command to power motor 14, and the motor starts running. Power motor 14 drives the lifting threaded rod 12 to rotate. A bevel gear ring 18 is fixed to the top of the lifting threaded rod 12 and rotates synchronously with it. The bevel gear ring 18 meshes with four driven bevel gears 19, causing them to rotate. Each driven bevel gear 19 drives a horizontal threaded rod 21 to rotate synchronously. At the same time, the lifting threaded rod 12 also drives the lifting plate 15 to move up and down (due to the threaded connection), and the guide rod 16 ensures that it only moves in a straight line. The rotation of the horizontal threaded rod 21 causes the moving sleeve 22 to slide left and right along the limiting rod 23. The moving sleeve 22 drives the fixed rod 220 to move and causes the first water spray pipe 24 to extend or retract laterally. The up and down movement of the lifting plate 15 causes the connecting rod 26 to slide in the moving groove 11. The fixed sleeve 27 pushes the telescopic rod 28 to extend or retract, causing the second water spray pipe 29 to expand or retract accordingly.

[0037] After the water pump 6 starts, it draws water from the water tank 4. The water flows through the water pump 6, the first corrugated pipe 8, and the diverter shell 9. The diverter shell 9 distributes the water flow to eight second corrugated pipes 32. The second corrugated pipes 32 are connected to four first spray pipes 24 and four second spray pipes 29 respectively. The high-pressure nozzles 25 on the first spray pipes 24 and the second spray pipes 29 spray water simultaneously, atomizing the water and spraying it out to ensure that the water mist fully captures dust particles in the air.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust suppression device for construction work, comprising a movable base (1) and brake casters (2) disposed at the four corners of its bottom, wherein a push rod (3) is fixedly connected to one side of the movable base (1) to move in coordination with the brake casters (2), characterized in that: A water tank (4) is fixedly connected to the top center of the movable base (1). An annular sleeve (10) is provided at the top center of the water tank (4). An annular shell (17) is fixedly connected to the top of the annular sleeve (10). A diversion shell (9) is fixedly connected to the top of the annular shell (17). At least four rectangular shells (20) are fixedly connected in a circular array on the surface of the annular shell (17). A first water spray pipe (24) is provided below the bottom of each of the four rectangular shells (20). At least four second water spray pipes (29) are arranged in a circular array on the surface of the annular shell (17). The four first water spray pipes (24) and the four second water spray pipes (29) are spaced apart on the annular shell (17). On the circumferential surface, the four No. 1 water spray pipes (24) and the four No. 2 water spray pipes (29) move from the center of the annular shell (17) to its circumference. The bottom of the four No. 1 water spray pipes (24) and the four No. 2 water spray pipes (29) are fixedly connected to multiple high-pressure nozzles (25) arranged at equal intervals. The end of the four No. 1 water spray pipes (24) and the four No. 2 water spray pipes (29) near the annular shell (17) is fixedly connected to a No. 2 corrugated pipe (32). The end of the eight No. 2 corrugated pipes (32) away from the No. 1 water spray pipes (24) and the No. 2 water spray pipes (29) is fixedly connected to the circumferential surface of the diversion shell (9).

2. The dust suppression device for construction sites as described in claim 1, characterized in that: A water pump (6) is fixedly connected to one side of the top of the water tank (4). A corrugated pipe (8) is fixedly connected to the outlet end of the water pump (6). The end of the corrugated pipe (8) away from the water pump (6) is fixedly connected to the top of the diversion shell (9). A support shell (13) is fixedly connected to the bottom of the annular sleeve (10). The bottom of the support shell (13) is fixedly connected to the center of the top of the water tank (4). A controller (33) is fixedly connected to the front surface of the water tank (4).

3. A construction dust suppression device as described in claim 2, characterized in that: A water inlet pipe (5) is fixedly connected to the other side of the top of the water tank (4). A water pump (6) is fixedly connected to a water pump pipe (7). The end of the water pump pipe (7) away from the water pump (6) extends to the lower part of the water tank (4) and is fixedly connected thereto. A vertically arranged lifting threaded rod (12) is rotatably connected inside the annular sleeve (10). The bottom of the lifting threaded rod (12) extends to the inside of the support shell (13) and is rotatably connected thereto.

4. A construction dust suppression device as described in claim 3, characterized in that: A power motor (14) is fixedly connected to the bottom of the inner wall of the support shell (13). The output shaft of the power motor (14) is fixedly connected to the bottom of the lifting threaded rod (12). The surface of the lifting threaded rod (12) is provided with at least four moving slots (11) in a circumferential array. The top of the lifting threaded rod (12) passes through the top of the annular sleeve (10) and extends into the annular shell (17) and is rotatably connected thereto. The lifting threaded rod (12) is located on the inner surface of the annular sleeve (10) and is threadedly connected to a lifting plate (15). A guide rod (16) is fixedly connected between the top and bottom of the inner wall of the annular sleeve (10). The lifting plate (15) and the guide rod (16) are slidably connected.

5. A construction dust suppression device as described in claim 4, characterized in that: The lifting plate (15) has at least four connecting rods (26) fixedly connected in a circumferential array on its surface. The four connecting rods (26) extend to the outside of the annular sleeve (10) and are slidably connected to the inner wall of the moving groove (11). The four connecting rods (26) are rotatably connected to an upwardly inclined fixed sleeve (27) at one end outside the annular sleeve (10). The four fixed sleeves (27) are slidably connected to a telescopic rod (28). The top end of the four telescopic rods (28) is rotatably connected to a second water spray pipe (29).

6. A construction dust suppression device as described in claim 5, characterized in that: The top of each of the four No. 2 water spray pipes (29) is slidably connected with a crossbar (30). Each of the four crossbars (30) is fixedly connected with an L-shaped plate (31) at one end away from each other. The crossbars (30) and the L-shaped plates (31) are fixedly connected to the circumferential surface of the annular shell (17) at one end close to each other. The lifting threaded rod (12) is fixedly fitted with a conical toothed ring (18) on the inner surface of the annular shell (17).

7. A construction dust suppression device as described in claim 6, characterized in that: The bottom of the bevel ring (18) is rotatably connected to the bottom of the inner wall of the annular shell (17). Four rectangular shells (20) arranged in a circumferential array are fixedly connected to the surface of the annular shell (17). The four rectangular shells (20) are staggered with the four crossbars (30). The top of the bevel ring (18) is meshed with four driven bevel gears (19) arranged in a circumferential array. The inner walls of the four driven bevel gears (19) are all fixedly connected with horizontally placed threaded rods (21).

8. A construction dust suppression device as described in claim 7, characterized in that: The four horizontal threaded rods (21) extend into the rectangular shell (20) from the end away from the driven bevel gear (19) and are rotatably connected thereto. The four horizontal threaded rods (21) are rotatably connected to the side of the rectangular shell (20) away from the inner wall of the annular shell (17). The four horizontal threaded rods (21) are all threadedly connected to movable sleeves (22) inside the four rectangular shells (20).

9. A construction dust suppression device as described in claim 8, characterized in that: Limiting rods (23) are fixedly connected between the inner walls of the annular shell (17) and the four rectangular shells (20). The movable sleeve (22) is slidably connected to the limiting rods (23). The bottom of the four rectangular shells (20) is provided with an opening. The bottom of the four movable sleeves (22) is fixedly connected with a fixing rod (220). The bottom of the fixing rod (220) extends to the bottom of the rectangular shell (20) and is fixedly connected to a first spray pipe (24).

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