Foundation pit dust falling device for building municipal engineering

Abstract

The invention provides a foundation pit dust falling device for building municipal engineering, and belongs to the technical field of foundation pit dust falling. Comprising a base, a water tank is placed in the base and used for storing water for foundation pit dust falling, a water pump is installed at the top of the water tank, and a water pipe is fixed to the water outlet end of the water pump. Through the arrangement of the water tank, the driving assembly and the spraying assembly, the whole device is moved to a concrete dismantling area, a water pump is started, the water pump operates to enable a first spray head and a second spray head of the spraying assembly to spray water mist in the horizontal direction, the water mist is attached to the concrete dismantling area in a foundation pit, and the concrete dismantling area is wetted by the water mist in advance; and after the concrete is wetted, the driving assembly drives the spraying assembly to rotate downwards, the first spraying head and the second spraying head spray water mist in the vertical direction, dust falling in the construction process is achieved, the water mist directly acts on the flying dust generation position, and therefore the flying dust treatment effect on the concrete dismantling area is improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit dust reduction, and in particular to a foundation pit dust reduction 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 conduct measurement and layout, after which the foundation pit can be excavated, the cushion layer can be laid, after which the cushion layer is laid, the formwork is laid on the side of the inner wall of the foundation pit, after which the foundation is poured, but due to environmental protection requirements, atomizing nozzles need to be installed at the enclosure at the edge of the foundation pit, during the construction process, the water mist sprayed by the atomizing nozzle is used to spray dust reduction treatment on the foundation pit area to reduce the generation of dust.

[0003] During the concrete pouring process in the foundation pit, due to the influence of the quality of formwork laying, formwork expansion will occur in places where the quality of formwork laying is poor, and the formwork expansion will cause the concrete at this place to swell. After the concrete solidifies, the swollen concrete needs to be removed manually with a pneumatic pick. 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 reduction treatment, which affects the dust control effect in the concrete removal area. Therefore, the present application provides a foundation pit dust reduction device for construction and municipal engineering to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a foundation pit dust reduction device for construction and municipal engineering to solve the problem that the atomizing nozzle on the enclosure is difficult to directly act on the concrete demolition area for dust reduction treatment, affecting the dust control effect in the concrete demolition area.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A foundation pit dust suppression device for building municipal engineering, comprising a base, a water tank is placed in 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, a water pipe is fixed to the water outlet of the water pump, a lifting bracket is arranged on the side of the base, a dust suppression mechanism is arranged on the end of the lifting bracket, the dust suppression mechanism comprises a driving component and a spraying component, the water pump realizes water supply to the spraying component through the water pipe and the driving component, the driving component is used to drive the spraying component to rotate, and the spraying component comprises a first nozzle and a second nozzle; During operation, the water pump runs to make nozzles one and two 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 before construction. After wetting, the driving assembly drives the spray assembly to rotate downward, so that nozzles one and two spray water mist in the vertical direction, thereby achieving dust reduction during the construction process.

[0006] Preferably, the lifting bracket includes a fixing plate fixed to the side of the base, an electric push rod and two guide sleeves are respectively fixed to the top of the fixing plate, the electric push rod is located between the two guide sleeves, a horizontal bar is fixed to the output end of the electric push rod, a guide rod sliding along the inner wall of the guide sleeve is fixed to the bottom of the horizontal bar, an L-shaped rod is fixed to the top of the horizontal bar, the drive assembly is arranged at one end of the L-shaped rod away from the horizontal bar, a pipe sleeve is fixed to the side of the L-shaped rod, and a water pipe passes through the pipe sleeve.

[0007] Preferably, a reinforcing rib is fixed to the top of the horizontal bar, and the reinforcing rib is fixed to the side of the L-shaped rod.

[0008] Preferably, the driving assembly includes a fixing frame fixed to the end of the L-shaped rod away from the horizontal bar, the fixing frame is rotatably connected to the outer shell inside, a steering gear is fixed to one side of the fixing frame, an end of the water pipe away from the water pump is embedded in the other side of the fixing frame, the water pipe is connected to the outer shell, the output end of the steering gear is fixedly connected to the side of the outer shell, the steering gear is used for the rotation of the outer shell, a servo motor is fixed to the top of the outer shell, the bottom of the inner wall of the outer shell is rotatably connected to the inner shell, the output end of the servo motor movably passes through the outer shell and is fixed with a circular shaft, the bottom of the circular shaft is fixedly connected to the bottom of the inner wall of the inner shell, and the spray assembly is arranged at the bottom of the inner shell.

[0009] Preferably, the spray assembly includes two rubber tubes fixed to the bottom of the inner shell, the nozzle 1 and the nozzle 2 are respectively fixed to the bottom of the two rubber tubes, and the rubber tubes are connected to the inner shell.

[0010] Preferably, two positioning seats are fixed on the bottom of the inner shell, the two rubber tubes are respectively located inside the two positioning seats, and the sides of the two positioning seats are respectively fixed with rotating shaft 1 and rotating shaft 2, and the bottoms of the two positioning seats are respectively provided with rotating cover 1 and rotating cover 2, and the two positioning seats are rotatably connected with rotating cover 1 and rotating cover 2 through rotating shaft 1 and rotating shaft 2, respectively, and the two rubber tubes are respectively located inside the rotating cover 1 and rotating cover 2, and a limiting ring 1 is fixed on the side of rotating cover 1, rotating shaft 1 is located inside the limiting ring 1, and an opening 1 is provided on the outer wall of the limiting ring 1, and a fixing block 1 is fixed on the circumferential surface of the rotating shaft 1, and the fixing block 1 is fitted with the side of the inner wall of the opening 1, and a limiting ring 2 is fixed on the side of the rotating cover 2, and the rotating shaft 2 is located inside the limiting ring 2, and an opening 2 is provided on the outer wall of the limiting ring 2, and a fixing block 2 is fixed on the circumferential surface of the rotating shaft 2, and the fixing block 2 is fitted with the side of the inner wall of the opening 2, and the arc length of the opening 1 is greater than the arc length of the opening 2.

[0011] Preferably, spring plates are fixed to the facing away surfaces of the two positioning seats, and the sides of the rotating cover 1 and the rotating cover 2 close to the spring plates are respectively fitted with the side surfaces of the spring plates.

[0012] Preferably, the two spring pieces are provided with wear-resistant parts at positions corresponding to rotating cover one and rotating cover two, the side of rotating cover one and rotating cover two close to the wear-resistant parts are in contact with the side faces of the wear-resistant parts, and the sides of rotating cover one and rotating cover two are provided with curved surfaces at positions corresponding to the wear-resistant parts.

[0013] Preferably, the length of the rotating cover one is greater than the length of the rotating cover two, and the rotation angle of the rotating cover one is greater than the rotation angle of the rotating cover two.

[0014] Preferably, a plurality of universal wheels are fixed to the bottom of the base.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, the whole device is moved to the concrete demolition area through the setting of water tank, driving assembly and spray assembly, and the water pump is started. The operation of the water pump makes nozzles 1 and 2 of the spray assembly 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 in the subsequent demolition process. After wetting, the driving assembly drives the spray assembly to rotate downward, so that nozzles 1 and 2 spray water mist in the vertical direction, so as to achieve dust reduction during the construction process, and make the water mist directly act on the dust generation position, thereby improving the dust control effect on the concrete demolition area.

[0016] By setting the rotating cover one and the rotating cover two, due to the influence that the length of the rotating cover one is greater than the length of the rotating cover two and the rotation angle of the rotating cover one is greater than the rotation angle of the rotating cover two, the distance of the water mist sprayed by the nozzle one is greater than the distance of the water mist sprayed by the nozzle two, and a double water curtain can be formed around the construction personnel during the rotation of the nozzles one and two. The outer water curtain acts on the concrete demolition area to continuously wet 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, thereby reducing the generation of dust again. When the outer water curtain acts on a 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 personnel. The inner water curtain acts on the periphery of the construction personnel, further preventing the dust generated in the concrete demolition area from affecting the construction personnel and performing dust reduction treatment on the generated dust, and the inner water curtain cooperates with the outer water curtain to further improve the blocking ability of the dust generated in the construction site where the foundation pit is located.

[0017] Through the setting of the spring piece, when the nozzles 1 and 2 spray water mist in the horizontal direction, the elastic force of the spring piece acts on the rotating cover 1 and the rotating cover 2, so that the nozzles 1 and 2 are close to each other during the initial rotation process under the drive of the servo motor on the driving assembly, and then gradually move away from each other under the influence of centrifugal force during the rotation process. This design allows the water mist to diffuse from the center to the surrounding areas when it acts on the concrete demolition area, effectively reducing the dead corners of the concrete demolition area from being wetted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front cross-sectional view of the water tank of the present invention; Figure 3 It is a front cross-sectional view of the housing of the present invention; Figure 4 It is a side sectional view of the electric push rod of the present invention; Figure 5 It is a schematic diagram of a three-dimensional structure of a rotating cover of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the steering gear of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the servo motor of the present invention; Figure 8 It is a schematic diagram of two three-dimensional structures of the rotating cover of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the spring piece of the present invention; Fig.10 It is a schematic diagram of the spray assembly of the present invention spraying water mist in the horizontal direction.

[0019] 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. horizontal bar; 11. L-shaped rod; 12. water pipe; 13. dust suppression mechanism; 14. driving assembly; 15. steering gear; 16. outer shell; 17. inner shell; 18. servo motor; 19. fixing bracket; 20. spray assembly; 21. nozzle 1; 22. nozzle 2; 23. rubber tube; 24. positioning seat; 25. rotating cover 1; 26. rotating cover 2; 27. rotating shaft 1; 28. limiting ring 1; 29. ​​opening 1; 30. opening 2; 31. spring; 32. wear-resistant part; 33. rotating shaft 2; 34. fixing block 1; 35. fixing block 2; 36. limiting ring 2.

[0020] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0021] The following is a detailed description of a foundation pit dust reduction device for construction and municipal engineering provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0022] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0023] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0024] like Figure 1-Figure 10 As 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 in 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 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 spray component 20, the water pump 3 realizes water supply to the spray component 20 through the water pipe 12 and the driving component 14, the driving component 14 is used to drive the spray component 20 to rotate, and the spray component 20 includes a nozzle 1 21 and a nozzle 2 22; During operation, the water pump 3 operates to make the nozzle 1 21 and the nozzle 2 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 component 14 through the water pipe 12 and spray it from the nozzle 1 21 and the nozzle 2 22 of the spray component 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 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 realizing the downward rotation for dust reduction during the construction process.

[0025] like Figure 2 and Figure 4 As shown, in this embodiment, the lifting bracket 5 includes a fixing plate 9 fixed to the side of the base 1, and an electric push rod 6 and two guide sleeves 8 are fixed to the top of the fixing plate 9 respectively. 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, and 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. The 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. The fixing plate 9 firmly connects the lifting bracket 5 On the base 1, the electric push rod 6 serves as a lifting power source, and pushes the horizontal bar 10 up and down through the output end. Through the cooperation of the guide rod 7 and the guide sleeve 8, the stability and accuracy of the horizontal bar 10 during the lifting process can be guaranteed to prevent it from shifting or shaking, thereby ensuring that the L-shaped rod 11 and the drive assembly 14 and the spray assembly 20 installed at its end can be accurately adjusted to the required height. The L-shaped rod 11 not only supports the drive assembly 14, but also provides a fixed path for the water pipe 12, so that the water pipe 12 can smoothly transport water to the dust reduction mechanism 13, thereby ensuring the stable operation of the entire dust reduction system.

[0026] like Figure 4 As shown, in this embodiment, a reinforcing rib is fixed on the top of the horizontal bar 10, and the reinforcing rib is fixed on the side of the L-shaped rod 11. The reinforcing rib enhances the connection strength between the horizontal bar 10 and the L-shaped rod 11. When the electric push rod 6 pushes the horizontal bar 10 up and down, the connection part between the horizontal bar 10 and the L-shaped rod 11 can be effectively prevented from being deformed or damaged, thereby improving the stability and reliability of the overall structure of the lifting bracket 5.

[0027] like Figure 2 , Figure 3 and Figure 6As shown, in this embodiment, the driving assembly 14 includes a fixing frame 19 fixed to the 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, and the 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, the 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 the rotation of the outer shell 16, a servomotor 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 servomotor 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 inner shell 17. At the bottom, the fixing frame 19 firmly mounts the driving assembly 14 on the L-shaped rod 11, and the servo 15 can accurately control the rotation angle of the outer shell 16, so as to realize the angle adjustment of the spray assembly 20 in the vertical direction, so that the nozzle 1 21 and the nozzle 2 22 can be flexibly switched between the horizontal spray before construction and the vertical spray during the construction process according to the construction requirements. The water pipe 12 is connected with the outer shell 16 through the fixing frame 19, so that the water can enter the inner shell 17 and be transported to the spray assembly 20. The servo motor 18 drives the inner shell 17 to rotate through the circular shaft, and then drives the spray assembly 20 installed at the bottom of the inner shell 17 to rotate, so that the nozzle 1 21 and the nozzle 2 22 can spray water mist during the rotation process, thereby expanding the coverage of the water mist and improving the dust reduction effect.

[0028] like Figure 3 As shown, in this embodiment, the spray assembly 20 includes two rubber tubes 23 fixed at the bottom of the inner shell 17, and the nozzle 1 21 and the nozzle 2 22 are respectively fixed at the bottom of the two rubber tubes 23. The rubber tube 23 is connected to the inner shell 17. The rubber tube 23 has a certain flexibility. When the inner shell 17 rotates, it can ensure the smooth flow of water between the nozzle 1 21 and the nozzle 2 22 and the inner shell 17, and at the same time adapt to the position change of the nozzle 1 21 and the nozzle 2 22 during the rotation process. The water in the inner shell 17 is respectively transported to the nozzle 1 21 and the nozzle 2 22 through the two rubber tubes 23 to realize the spraying of water mist.

[0029] like Figure 3 and Figure 5-Figure 8As shown, 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, and the sides of the two positioning seats 24 are respectively fixed with a rotating shaft 1 27 and a rotating shaft 2 33, and the bottoms of the two positioning seats 24 are respectively provided with a rotating cover 1 25 and a rotating cover 2 26, and the two positioning seats 24 are respectively rotatably connected with the rotating cover 1 25 and the rotating cover 2 26 through the rotating shaft 1 27 and the rotating shaft 2 33, and the two rubber tubes 23 are respectively located inside the rotating cover 1 25 and the rotating cover 2 26, and the side of the rotating cover 1 25 is fixed with a limiting ring 1 28 , the rotating shaft 27 is located inside the limiting ring 28, the outer wall of the limiting ring 28 is provided with an opening 29, a fixing block 34 is fixed on the circumferential surface of the rotating shaft 27, and the fixing block 34 is fitted with the side of the inner wall of the opening 29, the side of the rotating cover 26 is fixed with a limiting ring 36, the rotating shaft 233 is located inside the limiting ring 236, the outer wall of the limiting ring 236 is provided with an opening 230, a fixing block 235 is fixed on the circumferential surface of the rotating shaft 233, and the fixing block 235 is fitted with the side of the inner wall of the opening 230, the arc length of the opening 29 is greater than the arc length of the opening 230, the positioning seat 24 The rotating shaft 1 27 and the rotating shaft 2 33 on the upper surface provide a rotating fulcrum for the rotating cover 1 25 and the rotating cover 2 26 respectively. Through the rotating shaft 1 27 and the rotating shaft 2 33, the rotating cover 1 25 and the rotating cover 2 26 can rotate relative to the positioning seat 24, and the limiting ring 1 28 and the limiting ring 2 36 rotate with the rotating cover 1 25 and the rotating cover 2 26 respectively. During the rotation of the limiting ring 1 28, one side of the opening 1 29 is separated from the fixed block 1 34 until the other side of the opening 1 29 is attached to the fixed block 1 34. During the rotation of the limiting ring 2 36, one side of the opening 2 30 is separated from the fixed block 2 35 until the opening The other side of opening 230 is fitted with fixed block 235. Through the cooperation of limiting ring 1 28 and limiting ring 2 36 as well as fixing block 1 34 and fixing block 2 35, the rotation angle range of rotating cover 1 25 and rotating cover 2 26 is limited. Moreover, since the arc length of opening 1 29 is greater than the arc length of opening 2 30, the rotation angle of rotating cover 1 25 is greater than the rotation angle of rotating cover 26. This design enables nozzle 1 21 and nozzle 2 22 to form water mist sprays of different distances and ranges when rotating, laying the foundation for the subsequent formation of a double water curtain and effectively improving the dust reduction effect and flexibility.

[0030] like Figure 3As shown, in the present embodiment, spring pieces 31 are fixed to the back surfaces of the two positioning seats 24, and the sides of the rotating cover 1 25 and the rotating cover 2 26 close to the spring pieces 31 are respectively fitted with the side surfaces of the spring pieces 31, and the spring pieces 31 act on the rotating cover 1 25 and the rotating cover 2 26 by their own elastic force. When the servo motor 18 drives the nozzle 1 21 and the nozzle 2 22 to rotate, the nozzle 1 21 and the nozzle 2 22 are made to 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 diffuse to the surrounding areas, effectively reducing the wetting dead corners of the concrete demolition area and improving the coverage effect of the water mist on the concrete demolition area.

[0031] like Figure 3 and Fig. 9 As shown, in the present embodiment, the two spring pieces 31 are provided with wear-resistant parts 32 at the positions corresponding to the rotating cover 1 25 and the rotating cover 2 26, and the side of the rotating cover 1 25 and the rotating cover 2 26 close to the wear-resistant part 32 is fitted with the side of the wear-resistant part 32, and the side of the rotating cover 1 25 and the rotating cover 2 26 corresponding to the wear-resistant part 32 is provided with a curved surface, and the wear-resistant part 32 can improve the wear resistance of the contact position between the spring piece 31 and the rotating cover 1 25 and the rotating cover 2 26, thereby improving the service life of the spring piece 31, and the curved surface design corresponding to the side of the rotating cover 1 25 and the rotating cover 2 26 better fits with the wear-resistant part 32, while ensuring the elastic force of the spring piece 31 on the rotating cover 1 25 and the rotating cover 2 26, further reduces the friction, and further improves the service life of the spring piece 31.

[0032] like Figure 5-Figure 7 As shown, in this embodiment, the length of the rotating cover 1 25 is greater than the length of the rotating cover 26, and the rotation angle of the rotating cover 1 25 is greater than the rotation angle of the rotating cover 26. Since the length and rotation angle of the rotating cover 1 25 are greater than the rotating cover 26, the distance of the water mist sprayed by the nozzle 1 21 is greater than the distance of the water mist sprayed by the nozzle 2 22. During the rotation of the nozzle 1 21 and the nozzle 2 22, a double water curtain can be formed around the construction personnel. The outer water curtain is formed by the water mist of the nozzle 1 21, which acts on the concrete demolition area, continuously wets the concrete demolition area, and further reduces the demolition work. In addition to the generation of dust during the process, the newly exposed concrete during the demolition is also wetted, which further reduces the generation of dust. When the outer water curtain acts on a 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 location of the construction workers; the inner water curtain is formed by the water mist of the nozzle 22, which acts on the periphery of 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, which greatly improves the ability to block the dust generated in the construction site where the foundation pit is located.

[0033] like 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 allow the entire dust reduction device to have good mobility, making it convenient for construction workers to quickly and conveniently move the device to different concrete demolition areas in the foundation pit.

[0034] Working principle: The dust suppression device is composed of a base 1, a water tank 2, a water pump 3, a lifting bracket 5, a dust suppression mechanism 13, etc. A universal wheel 4 is installed at the bottom of the base 1 to facilitate moving the entire device to the concrete demolition area in the foundation pit. Before construction, the electric push rod 6 is started, and the output end of the electric push rod 6 drives the horizontal bar 10 to move upward. The guide rod 7 at the bottom of the horizontal bar 10 slides upward along the inner wall of the guide sleeve 8, so that the L-shaped rod 11 rises to increase the height of the spray assembly 20, or the output end of the electric push rod 6 drives the horizontal bar 10 to move downward to reduce the height of the spray assembly 20. By adjusting the height of the spray assembly 20, the nozzle 1 21 and the nozzle 2 22 of the spray assembly 20 are directed to the center of the concrete demolition area; Start the water pump 3, so that the water in the water tank 2 is transported to the outer shell 16 through the water pipe 12, and then enters the rubber tube 23 through the inner shell 17 and is sprayed out from the nozzle 1 21 and the nozzle 2 22. During the spraying process of the nozzle 1 21 and the nozzle 2 22, start the servo motor 18, and the servo motor 18 drives the inner shell 17 to rotate along the inner wall of the outer shell 16 through the circular shaft. The inner shell 17 drives the nozzle 1 21 and the nozzle 2 22 to rotate through the two positioning seats 24 and the rotating cover 1 25 and the rotating cover respectively. The nozzle 1 21 and the nozzle 2 When the first and second nozzles 22 spray water mist in the horizontal direction (i.e., the housing 16 is in a horizontal state), the elastic force of the spring piece 31 acts on the rotating cover 1 25 and the rotating cover 2 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 being close to 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 to wet the concrete demolition area in advance, thereby reducing the generation of dust from subsequent demolition. After wetting, the steering gear 15 drives The movable housing 16 rotates downward, causing the spray assembly 20 to rotate downward, and the nozzle 1 21 and the nozzle 2 22 spray water mist in the vertical direction (that is, the housing 16 is in a vertical state). The length and rotation angle of the rotating cover 1 25 are greater than those of the rotating cover 2 26. A double water curtain can be formed during the rotation of the nozzle 1 21 and the nozzle 2 22. Construction personnel enter the double water curtain and hold a pneumatic pick to carry out demolition work in the concrete demolition area. The outer water curtain acts on the concrete demolition area to continuously wet the concrete demolition area, further reducing the generation of dust during the demolition process, and at the same time, wets the newly exposed concrete during the demolition, further reducing the generation of dust. When the outer water curtain acts on a 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 personnel. The inner water curtain acts on the periphery of the construction personnel, further preventing the dust generated in the concrete demolition area from affecting the construction personnel and performing dust reduction treatment on the generated dust. The inner water curtain cooperates with the outer water curtain to further improve the ability to block the dust generated in the construction site where the foundation pit is located. After the demolition of the concrete demolition area is completed, the entire device is turned off, and then the entire device is moved to other areas that need to be demolished and the above steps are repeated to reduce dust.

[0035] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection 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.

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 dust suppression device for foundation pits used in construction and municipal engineering according to claim 2, characterized in that: 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 a 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).

5. The foundation pit dust suppression device for construction and municipal engineering according to claim 4, characterized in that: The spray assembly (20) comprises two rubber tubes (23) fixed to the bottom of the inner shell (17), spray head 1 (21) and 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).

6. The foundation pit dust suppression device for construction and municipal engineering according to claim 5, characterized in that: 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) via the first rotating shaft (27) and the second rotating shaft (33), the two rubber tubes (23) are respectively located inside the first rotating cover (25) and the second rotating cover (26), a first limiting ring (28) is fixed to the side of the first rotating cover (25), and the second rotating cover (26) is provided with a first rotating cover (25). The shaft one (27) is located inside the limiting ring one (28), and the outer wall of the limiting ring one (28) is provided with an opening one (29). A fixing block one (34) is fixed on the circumferential surface of the rotating shaft one (27), and the fixing block one (34) is in contact with the side surface of the inner wall of the opening one (29). The side surface of the rotating cover two (26) is fixed with the limiting ring two (36). The rotating shaft two (33) is located inside the limiting ring two (36), and the outer wall of the limiting ring two (36) is provided with an opening two (30). A fixing block two (35) is fixed on the circumferential surface of the rotating shaft two (33), and the fixing block two (35) is in contact with the side surface 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).

7. The foundation pit dust suppression device for construction and municipal engineering according to claim 6, characterized in that: The two facing surfaces of the two positioning seats (24) are both fixed with spring plates (31), and the sides of the rotating cover 1 (25) and the rotating cover 2 (26) close to the spring plates (31) are respectively fitted with the side surfaces of the spring plates (31).

8. The foundation pit dust suppression device for construction and municipal engineering according to claim 7, 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).

9. The foundation pit dust suppression device for construction and municipal engineering according to claim 7, characterized in that: 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).

10. 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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