Flying dust prevention and dust falling device for foundation pit excavation

Abstract

The utility model discloses a dust raising prevention and dust falling device for foundation pit excavation. The dust raising prevention and dust falling device is used for overcoming the defect that an existing spraying and dust falling device cannot achieve accurate spraying only for a construction area. The device comprises linear guide rails, sliding seats, an arched shed, auxiliary side curtains and a micro-spraying system, wherein the linear guide rails are fixed on two sides of a foundation pit; sliding bases are fixedly installed at the two ends of each metal rod support respectively, the two sliding bases are in sliding fit with linear guide rails on the two sides of a foundation pit respectively, the multiple sets of metal rod supports stretch across the foundation pit, and film covering structures are arranged on the outer sides of the metal rod supports. A spraying nozzle of the micro-spraying system has a spraying action towards the inner space of the arched shed; a D-shaped outline is formed by the transverse support and the metal rod support, two sliding blocks are installed on the transverse support in a sliding mode, and an auxiliary side curtain is installed between the two sliding blocks. The device is temporarily built in a construction area of foundation pit excavation, and the defect that accurate spraying cannot be achieved on the construction area is overcome.

Description

Technical Field

[0001] This utility model relates to the technical field of dust control and dust suppression equipment in foundation pit construction. Background Technology

[0002] In foundation pit excavation projects, the current dust suppression technology for dust generated during the excavation process generally uses mist cannons or spray nozzles for water mist dust suppression on construction sites. That is, by setting up water spray micro-pipes and micro-spray nozzles on the perimeter fence of the construction area, the dust generated during the construction process is suppressed by spraying. The principle of this technology is that the tiny water mist, after combining with the dust, increases in weight and falls down and eventually drips. Because water mist dust suppression is effective, it is widely used.

[0003] According to the applicant's technical staff, the application of existing fog cannon dust suppression technology also has limitations. For example, it requires the laying of long pipeline systems and the deployment of a large number of spray heads. In reality, taking a 500-meter-long foundation pit as an example, hundreds of spray heads are needed to achieve full coverage, and simultaneous spraying consumes a lot of energy. In other words, existing fog dust suppression systems cannot target dust-generating construction points, resulting in indiscriminate dust suppression and leading to high power and high energy consumption of dust suppression equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a dust suppression device for foundation pit excavation, which solves the problem that existing spray dust suppression devices cannot achieve precise spraying only on the construction area.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A dust control device for foundation pit excavation includes a linear guide rail, a sliding seat, an arched canopy, auxiliary side curtains, and a micro-spray system, characterized in that: the linear guide rail is fixed on both sides of the foundation pit;

[0007] The arched shed includes an arched metal rod support frame, with sliding seats fixedly installed at both ends of the metal rod support frame. The two sliding seats slide in cooperation with the linear guide rails on both sides of the foundation pit. Multiple sets of metal rod supports are arranged across the foundation pit, and a membrane structure is provided on the outside of the metal rod support frame. The spray nozzles of the micro-spray system are installed on the metal rod support frame and spray towards the interior space of the arched shed.

[0008] The metal rod supports at both ends of the arched shed are also provided with horizontal supports. The horizontal supports and the metal rod supports form a D-shaped outline. Two sliders are slidably installed on the horizontal supports. An auxiliary side curtain is installed between the two sliders. The auxiliary side curtain extends downward into the pit and upward into the D-shaped outline area.

[0009] Furthermore, the coating structure is a plastic film.

[0010] Furthermore, the slide is provided with a locking nut. When the locking nut is locked, the slide is fixed on the linear guide rail. When the locking nut is not locked, the slide slides along the linear guide rail.

[0011] Furthermore, the metal rod support is an arched structure formed by bending three parallel metal tubes, and a triangular support is provided on the metal rod support to spread the three metal tubes apart.

[0012] Furthermore, the linear guide rail has a T-shaped, I-shaped, or Ω-shaped cross-section.

[0013] Furthermore, a steel wire rope is installed on the slide.

[0014] Furthermore, the transverse support is composed of four parallel optical rods, with two sections fixedly connected to the slide block.

[0015] Furthermore, the micro-spray system includes a water tank, a variable frequency water pump, water pipes, spray nozzles, and an electrical control cabinet. The water tank, variable frequency water pump, and electrical control cabinet are mounted on a handcart, and the water pipes extend to a metal rod bracket and are arranged along an arched direction to install the spray nozzles.

[0016] The beneficial effects of this utility model are:

[0017] This device, by being temporarily erected within the construction area of ​​the excavated foundation pit, overcomes the drawback of being unable to achieve precise spraying of the construction area. Simultaneously, this device has a certain degree of mobility, allowing it to move its position as the excavation progresses, meeting the usage requirements of the construction site. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the usage status of this device.

[0019] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0020] Figure 3 for Figure 1 The corresponding vertical cross-sectional view.

[0021] Figure 4 for Figure 1 The corresponding longitudinal cross-sectional view.

[0022] Figure 5 This is a three-dimensional view of the device.

[0023] Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0024] Figure 7 This forms the skeleton structure of the device.

[0025] In the picture:

[0026] 00 foundation pit,

[0027] 100 linear guide rail,

[0028] 200 slide block, 210 locking nut, 220 wire rope

[0029] 300 arched canopy, 310 metal pole support, 311 triangular support, 320 plastic film, 330 horizontal support.

[0030] 400 auxiliary side curtain, 410 slider, 420 support rod.

[0031] 500 micro-spray system, 510 spray nozzle. Detailed Implementation

[0032] This embodiment will be described in conjunction with the appendix to the instruction manual. Figure 1 To be continued Figure 7 A detailed description of a dust control device for foundation pit excavation is provided. This description is exemplary and is presented as comprehensively as possible.

[0033] This device includes a linear guide rail 100, a slide 200, an arched canopy 300, an auxiliary side curtain 400, and a micro-spray system 500. The linear guide rail 100 is temporarily fixed to the foundation on both sides of the pit 00 by means of ground anchors or steel rods. The two linear guide rails are parallel to each other after fixing.

[0034] Furthermore, the linear guide 100 has a T-shaped, I-shaped, or Ω-shaped cross-section and is either a self-made guide or a standard guide, with a corresponding slide block having a corresponding groove profile.

[0035] The arched shed 300 includes a metal rod support 310 and a plastic film 320. The metal rod support 310 is an arched structure formed by bending three parallel metal tubes. Triangular supports 311 are installed on the metal rod support, maintaining the three metal tubes at an appropriate distance, effectively improving the rigidity of the metal rod support. A sliding block 200 is mechanically fixed to each end of the metal rod support by welding. That is, there is a sliding block at each end of the metal rod support, and the two sliding blocks slide into linear guide rails on both sides of the pit. A locking nut 210 is provided on each sliding block 200. When locked, the locking nut temporarily fixes the sliding block to the linear guide rail, completing the temporary fixation. In the unlocked state, the sliding block can slide along the linear guide rail.

[0036] Furthermore, a wire rope 220 is provided on the slide block 200. The wire rope is looped, and the wire rope is provided to facilitate the operator to move the position of the slide block.

[0037] The plastic film cover 320 forms a film structure on the outside or inside of the aforementioned metal rod support.

[0038] In this embodiment, there are 7 sets of metal rod supports 310 in the arched shed, which are set across the foundation pit. The 7 sets of metal rod supports are independent of each other. The metal rod supports 310 at both ends of the arched shed are also provided with transverse supports 330. The two ends of the transverse supports are fixed on the corresponding two slides 200, forming a D-shaped outline with the metal rod supports.

[0039] In a preferred embodiment, the aforementioned transverse support 330 is composed of four parallel optical rods, and two sliders 410 are slidably mounted on the transverse support, with the two sliders adjusting their positions on the transverse support.

[0040] The distance between the two sliders 410 is adjusted quickly according to the foundation pit. After adjustment, the distance between the two sliders is equivalent to the width of the foundation pit. After adjustment, a support rod 420 and an auxiliary side curtain 400 are installed between the two sliders. The auxiliary side curtain extends downward into the foundation pit and upward to the D-shaped area on the side of the arched canopy to form a dustproof structure on the side.

[0041] The micro-spray system 500 includes a water tank, a variable frequency water pump, water pipes, spray nozzles 510, and an electrical control cabinet. The water tank, variable frequency water pump, and electrical control cabinet are mounted on a handcart, providing a certain degree of mobility. The water pipes are arranged on the aforementioned metal rod support and along the arched direction. The spray nozzles 510 are installed, and through the pressurization of the variable frequency water pump, the spray nozzles are located inside the arched canopy and spray timed and quantitatively into the internal working space to achieve dust suppression in the working area.

[0042] The usage process of this embodiment is as follows:

[0043] Based on the construction site requirements, the construction area for the foundation pit was determined. Linear guide rails were installed on both sides of this area, and the arched canopy was then installed in place. Once installed, the position of the arched canopy could be adjusted. Theoretically, the length of the linear guide rails could be extended as needed, thus enabling the relocation of the device. After the auxiliary side curtains were installed, the micro-spray system was set up. A trial spray was then conducted after setup, completing the construction area setup for the device. When workers were operating within this area, dust suppression operations were performed on the foundation pit construction area.

[0044] In this embodiment, the construction area of ​​the foundation pit is partially or semi-enclosed, which can effectively prevent the spread of dust in the construction area, and the dust is controlled in the smallest area by the help of the micro-spray system, thus achieving clean construction.

[0045] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements to the present utility model by those skilled in the art should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A dust raising and falling prevention device for foundation pit excavation, comprising a linear guide rail, a sliding seat, an arched shed, an auxiliary side curtain and a micro-spray system, characterized in that: The linear guide rails are fixed on both sides of the foundation pit; The arched shed comprises metal rod supports in arched structure, the metal rod supports are respectively fixedly installed with sliding seats at two ends, the two sliding seats are respectively in sliding cooperation with the linear guide rails on both sides of the foundation pit, a plurality of groups of metal rod supports are arranged across the foundation pit, and a film covering structure is arranged outside the metal rod supports; the spray nozzles of the micro-spray system are installed on the metal rod supports and have a spraying action towards the interior space of the arched shed; The metal rod supports at two ends of the arched shed are further provided with transverse supports, the transverse supports and the metal rod supports form a D-shaped profile, two sliding blocks are slidably installed on the transverse supports, and an auxiliary side curtain is installed between the two sliding blocks, the auxiliary side curtain extends downwards to the interior of the foundation pit and extends upwards to the D-shaped profile area.

2. The dust raising and falling prevention device for foundation pit excavation according to claim 1, characterized in that, The film covering structure is a plastic film.

3. The device according to claim 1, characterized in that, The sliding seat is provided with a locking nut, in the locked state, the sliding seat is fixed on the linear guide rail, and in the unlocked state, the sliding seat slides along the linear guide rail.

4. The dust raising and falling prevention device for foundation pit excavation according to claim 1, characterized in that, The metal rod support is an arched structure formed by bending three metal pipes parallel to each other, and a triangular support is arranged on the metal rod support to support the three metal pipes.

5. The dust raising and falling prevention device for foundation pit excavation according to claim 1, characterized in that, The linear guide rail is in T-shaped, I-shaped or Ω-shaped section.

6. The dust raising and falling prevention device for foundation pit excavation according to claim 1, characterized in that, Steel wire ropes are arranged on the sliding seats.

7. The dust raising and falling prevention device for foundation pit excavation according to claim 1, characterized in that, The transverse support is composed of four parallel light rods, and two sections are fixedly connected with the sliding seat.

8. The dust raising and falling prevention device for foundation pit excavation according to claim 1, characterized in that, The micro-spray system comprises a water tank, a variable frequency water pump, a water pipe, a spray nozzle and an electric control cabinet, wherein the water tank, the variable frequency water pump and the electric control cabinet are installed on the handcart, the water pipe extends to the metal rod support and is arranged along the arched direction to install the spray nozzle.

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