A dust reduction device for foundation pits in building municipal engineering

Abstract

The present invention provides a foundation pit dust suppression device for building municipal engineering, belonging to the technical field of foundation pit dust suppression; it includes a base, a water tank is placed inside the base, the water tank is used to store water for foundation pit dust suppression, a water pump is installed on the top of the water tank, and a water pipe is fixed at the water outlet end of the water pump. Through the settings of the water tank, the driving component and the spraying component, the whole device is moved to the concrete demolition area, the water pump is started, and the water pump operates to make the nozzles 1 and 2 of the spraying component spray water mist in the horizontal direction. The water mist adheres to the concrete demolition area in the foundation pit, and the water mist wets the concrete demolition area in advance to reduce the generation of dust during the subsequent demolition process. After being wet, the driving component drives the spraying component to rotate downward, so that the nozzles 1 and 2 spray water mist in the vertical direction, realizing dust suppression during the construction process, making the water mist directly act on the position where the dust is generated, thereby improving the dust control effect on the concrete demolition area.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit dust suppression, and particularly relates to a foundation pit dust suppression device for building municipal engineering. Background Art

[0002] In the construction of building municipal engineering, it is necessary to first level the construction site, then carry out surveying and setting out. After setting out, the foundation pit can be excavated. After the excavation of the foundation pit is completed, the cushion layer is laid. After the laying of the cushion layer is completed, the formwork is laid on the side of the inner wall of the foundation pit. After the laying is completed, the foundation is poured. However, due to environmental protection requirements, atomizing nozzles need to be installed at the enclosure at the edge of the foundation pit, and the water mist sprayed by the atomizing nozzles during the construction process is used to spray and suppress dust in the foundation pit area to reduce the generation of dust.

[0003] During the concrete pouring process in the foundation pit, affected by the laying quality of the formwork, formwork bulging will occur at the place where the laying quality of the formwork is poor. After the formwork bulging, the concrete here will bulge. After the concrete solidifies, it is necessary to manually hold a pneumatic pick to remove the bulging concrete. Dust will be generated during the removal process, and the atomizing nozzles on the enclosure are difficult to directly act on the concrete removal area for dust suppression treatment, affecting the treatment effect of dust in the concrete removal area. Therefore, the present application provides a foundation pit dust suppression device for building municipal engineering to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a foundation pit dust suppression device for building municipal engineering to solve the problem that the atomizing nozzles on the enclosure are difficult to directly act on the concrete removal area for dust suppression treatment, affecting the treatment effect of dust in the concrete removal area.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] A foundation pit dust suppression device for building municipal engineering, including a base. A water tank is placed inside the base, and the water tank is used to store water for foundation pit dust suppression. A water pump is installed on the top of the water tank, and a water pipe is fixed to the water outlet end of the water pump. A lifting bracket is arranged on the side of the base, and a dust suppression mechanism is arranged at the end of the lifting bracket. The dust suppression mechanism includes a driving component and a spraying component. The water pump supplies water to the spraying component through the water pipe and the driving component. The driving component is used to drive the spraying component to rotate. The spraying component includes a first nozzle and a second nozzle;

[0007] During operation, the water pump operates to make the first nozzle and the second nozzle spray water mist in the horizontal direction. The water mist adheres to the concrete removal area in the foundation pit. The water mist wets the concrete removal area before construction. After wetting, the driving component drives the spraying component to rotate downward, so that the first nozzle and the second nozzle spray water mist in the vertical direction, realizing dust suppression during the construction process.

[0008] Preferably, the lifting bracket includes a fixing plate fixed to the side of the base. At the top of the fixing plate, an electric push rod and two guide sleeves are respectively fixed. The electric push rod is located between the two guide sleeves. The output end of the electric push rod is fixed with a cross bar. At the bottom of the cross bar, a guide rod sliding along the inner wall of the guide sleeve is fixed. At the top of the cross bar, an L-shaped rod is fixed. The driving assembly is arranged at one end of the L-shaped rod away from the cross bar. A pipe sleeve is fixed to the side of the L-shaped rod, and the water pipe passes through the pipe sleeve.

[0009] Preferably, a reinforcing rib is fixed to the top of the cross bar, and the reinforcing rib is fixed to the side of the L-shaped rod.

[0010] Preferably, the driving assembly includes a fixing frame fixed to one end of the L-shaped rod away from the cross bar. Inside the fixing frame, a housing is rotatably connected. On one side of the fixing frame, a steering gear is fixed. One end of the water pipe away from the water pump is embedded in the other side of the fixing frame, and the water pipe is communicated with the housing. The output end of the steering gear is fixedly connected to the side of the housing. The steering gear is used for the rotation of the housing. At the top of the housing, a servo motor is fixed. At the bottom of the inner wall of the housing, an inner housing is rotatably connected. The output end of the servo motor movably penetrates through the housing and is fixed with a round shaft. The bottom of the round shaft is fixedly connected to the bottom of the inner wall of the inner housing. The spraying assembly is arranged at the bottom of the inner housing.

[0011] Preferably, the spraying assembly includes two rubber hoses fixed to the bottom of the inner housing. Nozzle 1 and Nozzle 2 are respectively fixed to the bottoms of the two rubber hoses, and the rubber hoses are communicated with the inner housing.

[0012] Preferably, two positioning seats are fixed to the bottom of the inner housing. The two rubber hoses are respectively located inside the two positioning seats. On the sides of the two positioning seats, a rotating shaft 1 and a rotating shaft 2 are respectively fixed. At the bottoms of the two positioning seats, a rotating cover 1 and a rotating cover 2 are respectively arranged. The two positioning seats are respectively rotatably connected to the rotating cover 1 and the rotating cover 2 through the rotating shaft 1 and the rotating shaft 2. The two rubber hoses are respectively located inside the rotating cover 1 and the rotating cover 2. A limiting ring 1 is fixed to the side of the rotating cover 1. The rotating shaft 1 is located inside the limiting ring 1. An opening 1 is formed on the outer wall of the limiting ring 1. A fixing block 1 is fixed to the circumferential surface of the rotating shaft 1, and the fixing block 1 is attached to the side of the inner wall of the opening 1. A limiting ring 2 is fixed to the side of the rotating cover 2. The rotating shaft 2 is located inside the limiting ring 2. An opening 2 is formed on the outer wall of the limiting ring 2. A fixing block 2 is fixed to the circumferential surface of the rotating shaft 2, and the fixing block 2 is attached to the side of the inner wall of the opening 2. The arc length of the opening 1 is greater than the arc length of the opening 2.

[0013] Preferably, elastic pieces are fixed to the opposite surfaces of the two positioning seats, and the sides of the rotating cover 1 and the rotating cover 2 close to the elastic pieces are respectively attached to the sides of the elastic pieces.

[0014] Preferably, wear-resistant parts are provided at positions corresponding to the first rotating cover and the second rotating cover on both of the two elastic pieces. The sides of the first rotating cover and the second rotating cover close to the wear-resistant parts are in contact with the side surfaces of the wear-resistant parts. Curved surfaces are provided at positions corresponding to the wear-resistant parts on the side surfaces of the first rotating cover and the second rotating cover.

[0015] Preferably, the length of the first rotating cover is greater than the length of the second rotating cover, and the rotation angle of the first rotating cover is greater than the rotation angle of the second rotating cover.

[0016] Preferably, a plurality of universal wheels are fixed to the bottom of the base.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above solution, through the settings of the water tank, the driving component and the spraying component, the whole device is moved to the concrete demolition area. The water pump is started, and the operation of the water pump causes the nozzles 1 and 2 of the spraying component to spray water mist in the horizontal direction. The water mist adheres to the concrete demolition area in the foundation pit. The water mist wets the concrete demolition area in advance to reduce the generation of dust during the subsequent demolition process. After being wet, the driving component drives the spraying component to rotate downward, so that the nozzles 1 and 2 spray water mist in the vertical direction, realizing dust reduction during the construction process, enabling the water mist to directly act on the position where dust is generated, thereby improving the dust control effect on the concrete demolition area.

[0019] Through the settings of the first rotating cover and the second rotating cover, affected by the fact that the length of the first rotating cover is greater than the length of the second rotating cover and the rotation angle of the first rotating cover is greater than the rotation angle of the second rotating cover, the distance that the nozzle 1 sprays water mist is greater than the distance that the nozzle 2 sprays water mist. During the rotation of the nozzles 1 and 2, a double water curtain can be formed around the construction workers. The outer water curtain acts on the concrete demolition area, continuously wetting the concrete demolition area, further reducing the generation of dust during the demolition process, and at the same time wetting the newly exposed concrete during the demolition, reducing the generation of dust again. When the outer water curtain acts on the position outside the concrete demolition area, it can prevent the dust generated in the construction site where the foundation pit is located from drifting to the position of the construction workers. The inner water curtain acts around the construction workers, further preventing the dust generated in the concrete demolition area from affecting the construction workers and performing dust reduction treatment on the generated dust, and the inner water curtain and the outer water curtain cooperate to further improve the blocking ability of the dust generated in the construction site where the foundation pit is located.

[0020] Through the setting of the elastic pieces, when the nozzles 1 and 2 spray water mist in the horizontal direction, the elastic force of the elastic pieces acts on the first rotating cover and the second rotating cover, so that under the drive of the servo motor on the driving component, the nozzles 1 and 2 are in a state of approaching each other during the initial rotation process, and then gradually move away from each other under the influence of centrifugal force during the rotation process. This design enables the water mist to spread from the center to the surrounding when acting on the concrete demolition area, effectively reducing the wetting dead angle of the concrete demolition area. Brief Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a front sectional view of the water tank of the present invention;

[0023] Figure 3 is a front sectional view of the outer shell of the present invention;

[0024] Figure 4 is a side sectional view of the electric push rod of the present invention;

[0025] Figure 5 is a three-dimensional structure schematic diagram of the first rotating cover of the present invention;

[0026] Figure 6 is a three-dimensional structure schematic diagram of the steering gear of the present invention;

[0027] Figure 7 is a three-dimensional structure schematic diagram of the servo motor of the present invention;

[0028] Figure 8 is a three-dimensional structure schematic diagram of the second rotating cover of the present invention;

[0029] Figure 9 is a three-dimensional structure schematic diagram of the elastic sheet of the present invention;

[0030] Figure 10 is a schematic diagram of the water mist state sprayed by the spray assembly of the present invention in the horizontal direction.

[0031] In the figure: 1, base; 2, water tank; 3, water pump; 4, universal wheel; 5, lifting bracket; 6, electric push rod; 7, guide rod; 8, guide sleeve; 9, fixing plate; 10, cross bar; 11, L-shaped rod; 12, water pipe; 13, dust reduction mechanism; 14, drive assembly; 15, steering gear; 16, outer shell; 17, inner shell; 18, servo motor; 19, fixing frame; 20, spray assembly; 21, first nozzle; 22, second nozzle; 23, rubber hose; 24, positioning seat; 25, first rotating cover; 26, second rotating cover; 27, first rotating shaft; 28, first limiting ring; 29, first opening; 30, second opening; 31, elastic sheet; 32, wear-resistant part; 33, second rotating shaft; 34, first fixing block; 35, second fixing block; 36, second limiting ring.

[0032] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. Detailed implementation manners

[0033] The following will describe in detail a foundation pit dust suppression device for building municipal engineering provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments, and are not intended to specifically limit the present invention.

[0034] It should be pointed out that in the specification, the mention of "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicates that the described embodiment may include specific features, structures or characteristics, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, when combining an embodiment to describe a specific feature, structure or characteristic, implementing such a feature, structure or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge scope of those skilled in the relevant art.

[0035] Generally, terms can be understood at least in part from their use in the context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that may not be explicitly described.

[0036] As Figures 1-10 shown, an embodiment of the present invention provides a foundation pit dust suppression device for building municipal engineering, including a base 1. A water tank 2 is placed inside the base 1. The water tank 2 is used to store water for foundation pit dust suppression. A water pump 3 is installed on the top of the water tank 2. A water pipe 12 is fixed to the water outlet end of the water pump 3. A lifting bracket 5 is arranged on the side of the base 1. A dust suppression mechanism 13 is arranged at the end of the lifting bracket 5. The dust suppression mechanism 13 includes a driving component 14 and a spraying component 20. The water pump 3 supplies water to the spraying component 20 through the water pipe 12 and the driving component 14. The driving component 14 is used to drive the spraying component 20 to rotate. The spraying component 20 includes a first nozzle 21 and a second nozzle 22;

[0037] During operation, the water pump 3 operates to make the first nozzle 21 and the second nozzle 22 spray water mist in the horizontal direction. The water pump 3 operates to transport the water in the water tank 2 to the driving assembly 14 through the water pipe 12 and spray it out from the positions of the first nozzle 21 and the second nozzle 22 of the spraying assembly 20. The water mist adheres to the concrete demolition area in the foundation pit, and the water mist wets the concrete demolition area before construction. After wetting, the driving assembly 14 drives the spraying assembly 20 to rotate downward, so that the first nozzle 21 and the second nozzle 22 spray water mist in the vertical direction, realizing the downward rotation of dust reduction during the construction process.

[0038] As Figure 2 and Figure 4 shown, in this implementation scheme, the lifting bracket 5 includes a fixing plate 9 fixed to the side of the base 1. The top of the fixing plate 9 is respectively fixed with an electric push rod 6 and two guide sleeves 8. The electric push rod 6 is located between the two guide sleeves 8. The output end of the electric push rod 6 is fixed with a cross bar 10. The bottom of the cross bar 10 is fixed with a guide rod 7 sliding along the inner wall of the guide sleeve 8. The top of the cross bar 10 is fixed with an L-shaped rod 11. The driving assembly 14 is arranged at one end of the L-shaped rod 11 away from the cross bar 10. A pipe sleeve is fixed to the side of the L-shaped rod 11, and the water pipe 12 passes through the pipe sleeve. The fixing plate 9 firmly connects the lifting bracket 5 to the base 1. The electric push rod 6 serves as the lifting power source, pushes the cross bar 10 up and down through the output end, and through the cooperation of the guide rod 7 and the guide sleeve 8, can ensure the smoothness and accuracy of the cross bar 10 during the lifting process, prevent it from shifting or shaking, so as to ensure that the L-shaped rod 11 and the driving assembly 14 and the spraying assembly 20 installed at its end can be accurately adjusted to the required height. The L-shaped rod 11 not only supports the driving assembly 14, but also provides a fixed path for the water pipe 12, enabling the water pipe 12 to smoothly transport water to the dust reduction mechanism 13, ensuring the stable operation of the entire dust reduction system.

[0039] As Figure 4 shown, in this implementation scheme, a reinforcing rib is fixed to the top of the cross bar 10, and the reinforcing rib is fixed to the side of the L-shaped rod 11. The reinforcing rib enhances the connection strength between the cross bar 10 and the L-shaped rod 11. During the process of the electric push rod 6 pushing the cross bar 10 to lift and lower, it can effectively prevent the connection part between the cross bar 10 and the L-shaped rod 11 from deforming or being damaged, improving the stability and reliability of the overall structure of the lifting bracket 5.

[0040] As Figure 2 、 Figure 3 and Figure 6As shown in the figure, in this embodiment, the driving component 14 includes a fixing frame 19 fixed to one end of the L-shaped rod 11 away from the cross bar 10. A housing 16 is rotatably connected inside the fixing frame 19. A steering gear 15 is fixed to one side of the fixing frame 19. One end of the water pipe 12 away from the water pump 3 is embedded in the other side of the fixing frame 19. The water pipe 12 is communicated with the housing 16. The output end of the steering gear 15 is fixedly connected to the side surface of the housing 16. The steering gear 15 is used for the rotation of the housing 16. A servo motor 18 is fixed to the top of the housing 16. The bottom of the inner wall of the housing 16 is rotatably connected with an inner housing 17. The output end of the servo motor 18 movably penetrates through the housing 16 and is fixed with a round shaft. The bottom of the round shaft is fixedly connected to the bottom of the inner wall of the inner housing 17. The spraying component 20 is arranged at the bottom of the inner housing 17. The fixing frame 19 firmly mounts the driving component 14 on the L-shaped rod 11. The steering gear 15 can accurately control the rotation angle of the housing 16, so as to realize the angle adjustment of the spraying component 20 in the vertical direction, enabling the nozzle one 21 and the nozzle two 22 to flexibly switch between horizontal spraying before construction and vertical spraying during construction according to the construction requirements. The water pipe 12 is communicated with the housing 16 through the fixing frame 19, enabling water to enter the inner housing 17 and be conveyed to the spraying component 20. The servo motor 18 drives the inner housing 17 to rotate through the round shaft, and then drives the spraying component 20 installed at the bottom of the inner housing 17 to rotate, enabling the nozzle one 21 and the nozzle two 22 to spray water mist during the rotation process, expanding the coverage range of the water mist and improving the dust suppression effect.

[0041] As Figure 3 shown, in this embodiment, the spraying component 20 includes two rubber hoses 23 fixed to the bottom of the inner housing 17. The nozzle one 21 and the nozzle two 22 are respectively fixed to the bottoms of the two rubber hoses 23. The rubber hoses 23 are communicated with the inner housing 17. The rubber hoses 23 have a certain flexibility, which can ensure the smooth water flow between the nozzle one 21 and the nozzle two 22 and the inner housing 17 when the inner housing 17 rotates, and at the same time adapt to the position change of the nozzle one 21 and the nozzle two 22 during the rotation process. The water in the inner housing 17 is respectively conveyed to the nozzle one 21 and the nozzle two 22 through the two rubber hoses 23 to realize the spraying of water mist.

[0042] As Figure 3 and Figures 5-8As shown in the figure, in this embodiment, two positioning seats 24 are fixed at the bottom of the inner shell 17. Two rubber tubes 23 are respectively located inside the two positioning seats 24. A first rotating shaft 27 and a second rotating shaft 33 are respectively fixed on the sides of the two positioning seats 24. Rotating covers one 25 and two 26 are respectively arranged at the bottoms of the two positioning seats 24. The two positioning seats 24 are respectively rotationally connected to the rotating covers one 25 and two 26 through the first rotating shaft 27 and the second rotating shaft 33. The two rubber tubes 23 are respectively located inside the rotating covers one 25 and two 26. A first limiting ring 28 is fixed on the side of the rotating cover one 25. The first rotating shaft 27 is located inside the first limiting ring 28. An opening one 29 is formed on the outer wall of the first limiting ring 28. A first fixing block 34 is fixed on the circumferential surface of the first rotating shaft 27. The first fixing block 34 is attached to the side of the inner wall of the opening one 29. A second limiting ring 36 is fixed on the side of the rotating cover two 26. The second rotating shaft 33 is located inside the second limiting ring 36. An opening two 30 is formed on the outer wall of the second limiting ring 36. A second fixing block 35 is fixed on the circumferential surface of the second rotating shaft 33. The second fixing block 35 is attached to the side of the inner wall of the opening two 30. The arc length of the opening one 29 is greater than the arc length of the opening two 30. The first rotating shaft 27 and the second rotating shaft 33 on the positioning seat 24 respectively provide rotation fulcrums for the rotating covers one 25 and two 26. Through the first rotating shaft 27 and the second rotating shaft 33, the rotating covers one 25 and two 26 can rotate relative to the positioning seat 24. The first limiting ring 28 and the second limiting ring 36 respectively rotate with the rotating covers one 25 and two 26. During the rotation of the first limiting ring 28, one side of the opening one 29 is separated from the first fixing block 34 until the other side of the opening one 29 is attached to the first fixing block 34. During the rotation of the second limiting ring 36, one side of the opening two 30 is separated from the second fixing block 35 until the other side of the opening two 30 is attached to the second fixing block 35. Through the cooperation of the first limiting ring 28 and the second limiting ring 36 and the first fixing block 34 and the second fixing block 35, the rotation angle ranges of the rotating covers one 25 and two 26 are limited. And because the arc length of the opening one 29 is greater than the arc length of the opening two 30, the rotation angle of the rotating cover one 25 is greater than the rotation angle of the rotating cover two 26. This design enables the first nozzle 21 and the second nozzle 22 to form water mist jets with different distances and ranges during rotation, laying a foundation for the subsequent formation of a double water curtain, and effectively improving the dust reduction effect and flexibility.

[0043] As Figure 3As shown in the figure, in this implementation scheme, elastic pieces 31 are fixed on the back surfaces of the two positioning seats 24. The sides of the first rotating cover 25 and the second rotating cover 26 close to the elastic pieces 31 are respectively in contact with the side surfaces of the elastic pieces 31. The elastic pieces 31 act on the first rotating cover 25 and the second rotating cover 26 by virtue of their own elastic force. When the servo motor 18 drives the first nozzle 21 and the second nozzle 22 to rotate, the first nozzle 21 and the second nozzle 22 approach each other during the initial rotation process, and then gradually move away from each other under the influence of centrifugal force during the rotation process. Such a design makes the water mist concentrate at the center of the concrete demolition area at the initial stage of spraying, and then gradually spread to the surrounding areas, effectively reducing the wetting dead corners in the concrete demolition area and improving the coverage effect of the water mist on the concrete demolition area.

[0044] As Figure 3 and Figure 9 As shown in the figure, in this implementation scheme, wear-resistant parts 32 are arranged at the positions of the two elastic pieces 31 corresponding to the first rotating cover 25 and the second rotating cover 26. The sides of the first rotating cover 25 and the second rotating cover 26 close to the wear-resistant parts 32 are in contact with the side surfaces of the wear-resistant parts 32. Curved surfaces are arranged on the side surfaces of the first rotating cover 25 and the second rotating cover 26 corresponding to the positions of the wear-resistant parts 32. The wear-resistant parts 32 can improve the wear resistance of the contact positions between the elastic pieces 31 and the first rotating cover 25 and the second rotating cover 26, thereby increasing the service life of the elastic pieces 31. The corresponding curved surface design on the side surfaces of the first rotating cover 25 and the second rotating cover 26 fits better with the wear-resistant parts 32, further reducing friction while ensuring the elastic force of the elastic pieces 31 on the first rotating cover 25 and the second rotating cover 26, and further increasing the service life of the elastic pieces 31.

[0045] As Figures 5-7 As shown in the figure, in this implementation scheme, the length of the first rotating cover 25 is greater than the length of the second rotating cover 26, and the rotation angle of the first rotating cover 25 is greater than the rotation angle of the second rotating cover 26. Since both the length and the rotation angle of the first rotating cover 25 are greater than those of the second rotating cover 26, the distance at which the first nozzle 21 sprays water mist is greater than the distance at which the second nozzle 22 sprays water mist. During the rotation process of the first nozzle 21 and the second nozzle 22, a double water curtain can be formed around the construction workers. The outer water curtain is formed by the water mist of the first nozzle 21, acting on the concrete demolition area, continuously wetting the concrete demolition area, further reducing the generation of dust during the demolition process, and at the same time wetting the newly exposed concrete during the demolition, reducing the generation of dust again. And when the outer water curtain acts on the positions outside the concrete demolition area, it can prevent the dust generated in the construction site where the foundation pit is located from drifting to the position of the construction workers; the inner water curtain is formed by the water mist of the second nozzle 22, acting around the construction workers, further preventing the dust generated in the concrete demolition area from affecting the construction workers and performing dust reduction treatment on the generated dust. The inner water curtain and the outer water curtain cooperate with each other, greatly improving the blocking ability of the dust generated in the construction site where the foundation pit is located.

[0046] As Figure 2and Figure 4 As shown, in this embodiment, a plurality of universal wheels 4 are fixed to the bottom of the base 1. The universal wheels 4 endow the entire dust suppression device with good mobility, facilitating construction workers to quickly and conveniently move the device to different concrete demolition areas in the foundation pit.

[0047] Working principle: The base 1, water tank 2, water pump 3, lifting bracket 5, dust suppression mechanism 13, etc. constitute the dust suppression device. The bottom of the base 1 is equipped with universal wheels 4, which facilitate moving the entire device to the concrete demolition area in the foundation pit. Before construction, start the electric push rod 6. The output end of the electric push rod 6 drives the cross bar 10 to move upward. The guide rod 7 at the bottom of the cross bar 10 slides upward along the inner wall of the guide sleeve 8, causing the L-shaped rod 11 to rise and increasing the height of the spray assembly 20, or the output end of the electric push rod 6 drives the cross bar 10 to move downward to lower the height of the spray assembly 20. By adjusting the height of the spray assembly 20, the nozzles 21 and 22 of the spray assembly 20 are directed towards the central position of the concrete demolition area;

[0048] Start the water pump 3 so that the water in the water tank 2 is transported through the water pipe 12 into the outer shell 16, then enters the rubber pipe 23 through the inner shell 17 and sprays out from the first nozzle 21 and the second nozzle 22. During the spraying process of the first nozzle 21 and the second nozzle 22, start the servo motor 18. The servo motor 18 drives the inner shell 17 to rotate along the inner wall of the outer shell 16 through a round shaft. The inner shell 17 drives the first nozzle 21 and the second nozzle 22 to rotate through the cooperation with the first rotating cover 25 and the second rotating cover 24 respectively. When the first nozzle 21 and the second nozzle 22 spray water mist in the horizontal direction (i.e., when the outer shell 16 is in a horizontal state), the elastic force of the elastic piece 31 acts on the first rotating cover 25 and the second rotating cover 26, so that under the drive of the servo motor 18, the first nozzle 21 and the second nozzle 22 are in a state of approaching each other during the initial rotation process, and then gradually move away from each other under the influence of centrifugal force during the rotation process. The first nozzle 21 and the second nozzle 22 spray water mist in the horizontal direction, pre-wetting the concrete demolition area in advance to reduce the generation of subsequent demolition dust. After wetting, the steering gear 15 drives the outer shell 16 to rotate downward, so that the spraying assembly 20 rotates downward, and the first nozzle 21 and the second nozzle 22 spray water mist in the vertical direction (i.e., when the outer shell 16 is in a vertical state). The length and rotation angle of the first rotating cover 25 are greater than those of the second rotating cover 26. During the rotation of the first nozzle 21 and the second nozzle 22, a double water curtain can be formed. The construction workers enter the double water curtain and hold a pneumatic pick to carry out the demolition work in the concrete demolition area. The outer water curtain acts on the concrete demolition area, continuously wetting the concrete demolition area, further reducing the generation of dust during the demolition process, and at the same time wetting the newly exposed concrete during the demolition, reducing the generation of dust again. When the outer water curtain acts on the position outside the concrete demolition area, it can prevent the dust generated in the construction site where the foundation pit is located from spreading to the position of the construction workers. The inner water curtain acts around the construction workers, further preventing the dust generated in the concrete demolition area from affecting the construction workers and carrying out dust reduction treatment on the generated dust, and the inner water curtain and the outer water curtain cooperate to further improve the blocking ability of the dust generated in the construction site where the foundation pit is located;

[0049] After the demolition of the concrete demolition area is completed, turn off the entire device, and then move the entire device to other areas to be demolished and repeat the above steps for dust reduction.

[0050] The present invention covers any substitutions, modifications, equivalent methods and solutions made within the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A foundation pit dust suppression device for construction and municipal engineering, comprising a base (1), characterized in that: A water tank (2) is placed in the base (1), the water tank (2) is used to store water for dust reduction in the foundation pit, a water pump (3) is installed on the top of the water tank (2), a water pipe (12) is fixed to the water outlet end of the water pump (3), a lifting bracket (5) is arranged on the side of the base (1), a dust reduction mechanism (13) is arranged at the end of the lifting bracket (5), the dust reduction mechanism (13) comprises a driving assembly (14) and a spray assembly (20), the driving assembly (14) is used to drive the spray assembly (20) to rotate, and the spray assembly (20) comprises a first spray head (21) and a second spray head (22); When working, the water pump (3) operates to cause the nozzle 1 (21) and the nozzle 2 (22) to spray water mist in the horizontal direction. The water mist adheres to the concrete demolition area in the foundation pit, and the water mist wets the concrete demolition area before construction. After wetting, the driving component (14) drives the spray component (20) to rotate downward, so that the nozzle 1 (21) and the nozzle 2 (22) spray water mist in the vertical direction, thereby achieving dust reduction during the construction process; The driving assembly (14) comprises a fixing frame (19) fixed to an end of the L-shaped rod (11) away from the horizontal bar (10), the fixing frame (19) is rotatably connected to the outer shell (16), a steering gear (15) is fixed to one side of the fixing frame (19), an end of the water pipe (12) away from the water pump (3) is embedded in the other side of the fixing frame (19), the water pipe (12) is connected to the outer shell (16), an output end of the steering gear (15) is fixedly connected to the side of the outer shell (16), the steering gear (15) is used for rotating the outer shell (16), a servo motor (18) is fixed to the top of the outer shell (16), the bottom of the inner wall of the outer shell (16) is rotatably connected to the inner shell (17), the output end of the servo motor (18) movably passes through the outer shell (16) and is fixed with a round shaft, the bottom of the round shaft is fixedly connected to the bottom of the inner wall of the inner shell (17), and the spray assembly (20) is arranged at the bottom of the inner shell (17); The spray assembly (20) comprises two rubber tubes (23) fixed to the bottom of the inner shell (17), the spray head 1 (21) and the spray head 2 (22) are respectively fixed to the bottom of the two rubber tubes (23), and the rubber tubes (23) are connected to the inner shell (17); Two positioning seats (24) are fixed at the bottom of the inner shell (17), two rubber tubes (23) are respectively located inside the two positioning seats (24), a first rotating shaft (27) and a second rotating shaft (33) are respectively fixed to the sides of the two positioning seats (24), a first rotating cover (25) and a second rotating cover (26) are respectively arranged at the bottom of the two positioning seats (24), the two positioning seats (24) are rotatably connected to the first rotating cover (25) and the second rotating cover (26) through the first rotating shaft (27) and the second rotating shaft (33), and the two rubber tubes (23) are respectively located inside the first rotating cover (25) and the second rotating cover (26); The two positioning seats (24) have spring plates (31) fixed to their facing away surfaces, and the sides of the rotating cover 1 (25) and the rotating cover 2 (26) close to the spring plates (31) are respectively in contact with the side surfaces of the spring plates (31); The length of the rotating cover 1 (25) is greater than the length of the rotating cover 2 (26), and the rotation angle of the rotating cover 1 (25) is greater than the rotation angle of the rotating cover 2 (26).

2. The foundation pit dust suppression device for construction and municipal engineering according to claim 1, characterized in that: The lifting bracket (5) comprises a fixing plate (9) fixed to the side of the base (1), an electric push rod (6) and two guide sleeves (8) are fixed to the top of the fixing plate (9), the electric push rod (6) is located between the two guide sleeves (8), a horizontal bar (10) is fixed to the output end of the electric push rod (6), a guide rod (7) sliding along the inner wall of the guide sleeve (8) is fixed to the bottom of the horizontal bar (10), an L-shaped rod (11) is fixed to the top of the horizontal bar (10), a driving assembly (14) is arranged at one end of the L-shaped rod (11) away from the horizontal bar (10), a pipe sleeve is fixed to the side of the L-shaped rod (11), and a water pipe (12) passes through the pipe sleeve.

3. The foundation pit dust suppression device for construction and municipal engineering according to claim 2, characterized in that: A reinforcing rib is fixed to the top of the horizontal bar (10), and the reinforcing rib is fixed to the side of the L-shaped rod (11).

4. The foundation pit dust suppression device for construction and municipal engineering according to claim 1, characterized in that: A limit ring (28) is fixed on the side of the rotating cover (25), the rotating shaft (27) is located inside the limit ring (28), the outer wall of the limit ring (28) is provided with an opening (29), a fixed block (34) is fixed on the circumferential surface of the rotating shaft (27), the fixed block (34) is fitted with the side of the inner wall of the opening (29), a limit ring (36) is fixed on the side of the rotating cover (26), the rotating shaft (33) is located inside the limit ring (36), the outer wall of the limit ring (36) is provided with an opening (30), a fixed block (35) is fixed on the circumferential surface of the rotating shaft (33), the fixed block (35) is fitted with the side of the inner wall of the opening (30), and the arc length of the opening (29) is greater than the arc length of the opening (30).

5. The foundation pit dust suppression device for construction and municipal engineering according to claim 1, characterized in that: The two spring pieces (31) are both provided with wear-resistant parts (32) at positions corresponding to the rotating cover 1 (25) and the rotating cover 2 (26); a side of the rotating cover 1 (25) and the rotating cover 2 (26) close to the wear-resistant part (32) is in contact with a side surface of the wear-resistant part (32); and a curved surface is both provided on the side surfaces of the rotating cover 1 (25) and the rotating cover 2 (26) at positions corresponding to the wear-resistant part (32).

6. The foundation pit dust suppression device for construction and municipal engineering according to claim 1, characterized in that: A plurality of universal wheels (4) are fixed to the bottom of the base (1).

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