Foundation pit operation air film air filtering device

Abstract

The invention belongs to the technical field of air film filtering devices for foundation pits, and particularly relates to a foundation pit operation air film air filtering device which comprises a plurality of air supply devices and air supply pipes installed on the side edges of the air supply devices, a foundation pit air film covers a foundation pit, one ends of the air supply pipes are connected with the foundation pit air film, and the other ends of the air supply pipes are connected with the air supply devices. A plurality of top pumping and filtering devices are installed above the foundation pit air film, installation blocks are installed below the top pumping and filtering devices, air suction heads are installed below the installation blocks, the top pumping and filtering devices located at the top of the foundation pit air film can suck rising dust through air suction, and the top pumping and filtering devices are preferably dust filtering pumps. According to the technical scheme, the dust is collected through the dust collection device, the collected dust is absorbed by the top pumping and filtering device along with air, a filtering structure in the top pumping and filtering device can leave the dust, the air is released through an air outlet pipeline, and compared with a traditional spraying type dust falling means, the scheme can rapidly remove the dust, the filtering efficiency is improved, and consumed resources are few.

Description

Technical Field

[0001] The invention belongs to the field of air film filtering devices for foundation pits, in particular to an air film air filtering device for foundation pit operations. Background Art

[0002] When pit construction is carried out in areas with high population density, in order to prevent disturbance to residents and dust scattering, a pit air membrane will be placed outside the location where pit construction is required. The principle of the pit air membrane is to form a protective structure using the inflation principle. Specifically, air is injected into a special membrane material to expand it and form a stable support structure, which surrounds the pit and provides safe and reliable protection for the construction project. This structure supports the membrane body by maintaining the pressure difference between the inside and outside to form a closed space, thereby isolating the dust from the operation and reducing the construction noise.

[0003] A patent document with publication number CN215372798U discloses an air circulation device for an air-film building, which includes a circulating air duct and an air inlet duct. An exhaust fan is fixedly installed inside the exhaust fan room, an exhaust duct is fixedly connected to the right side of the circulating air duct, an exhaust fan is fixedly installed inside the exhaust fan room, an activated carbon adsorption plate is longitudinally movably installed at the inner center position of the circulating air duct, and stainless steel filter mesh plates are movably installed on the left and right sides of the activated carbon adsorption plate.

[0004] In the traditional technical solution, it is necessary to cover the construction pit with an air film to prevent the occurrence of dust nuisance in residential areas. However, the air film of the pit needs to maintain positive pressure inside the film at all times, that is, air is supplied through an external air supply device, and then the air in the air film of the pit is released to achieve air circulation. Therefore, air will continue to be added to the inside of the air film of the pit, and the air will continue to flow. During the construction process, dust is easily driven by the flowing air, which will cause dust to scatter.

[0005] To this end, the present invention provides an air film air filtering device for foundation pit operations. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the air film air filtration device for foundation pit operation described in the present invention comprises a plurality of air supply devices and air supply pipes installed on the side of the air supply devices, the foundation pit is covered with a foundation pit air film, one end of the plurality of air supply pipes is connected to the foundation pit air film, a plurality of top pump suction filter devices are installed above the foundation pit air film, a mounting block is installed below the top pump suction filter device, and an air suction head is installed below the mounting block;

[0008] A mounting frame is fixedly installed on the foundation pit air film, the mounting block is installed on the mounting frame, the air suction head penetrates the mounting frame and extends to the inside of the foundation pit air film, and a pipe for air outlet is arranged on the outside of the top pump suction and filtering device;

[0009] A lower stabilizing airbag is fixedly installed inside the foundation pit air film, the air supply pipe passes through the foundation pit air film and is connected with the lower stabilizing airbag, and a plurality of air inlet pipes are fixedly installed above the lower stabilizing airbag, and the air inlet pipes are inclined toward the inside of the foundation pit air film.

[0010] Preferably, the foundation pit air film includes an air film layer 1 and an air film layer 2, a thermal insulation layer is fixedly installed between the air film layer 1 and the air film layer 2, and the air supply pipe passes through the air film layer 1, the thermal insulation layer and the air film layer 2 and is connected to the lower stabilizing airbag.

[0011] Preferably, an air supply cavity and a component cavity are provided inside the lower stabilizing airbag, the air supply cavity is connected with the air supply pipe, an oblique air pipe network is installed inside the component cavity, and the top of the oblique air pipe network is connected with multiple air inlet pipes.

[0012] Preferably, the oblique air pipe network includes a plurality of transverse air pipes and vertical air pipes fixed inside the component cavity, the tops of the plurality of transverse air pipes are connected to corresponding air inlet pipes, the lower ends of the plurality of transverse air pipes are connected to the bottom wall of the component cavity, the plurality of transverse air pipes and vertical air pipes are connected correspondingly, the two ends of the plurality of vertical air pipes are connected to the inner wall of the component cavity, a plurality of connecting pipes are fixedly installed on the sides of the docking positions of the transverse air pipes and the vertical air pipes, and one ends of the plurality of connecting pipes are connected to the interior of the air supply cavity.

[0013] Preferably, a buoyancy airbag is installed on the top of the top pump suction filtering device, and air outlet components are installed on both sides of the buoyancy airbag. The air outlet component includes an air outlet pipe 1 connected to the buoyancy airbag, and an electromagnetic valve pipe is installed at the end of the air outlet pipe 1 close to the buoyancy airbag. An air outlet pipe 2 is installed on the side of the air outlet pipe 1, and one end of the air outlet pipe 2 is connected to the top pump suction filtering device.

[0014] Preferably, a ventilation groove is opened through the interior of the installation frame, the ventilation groove is connected to the interior of the foundation pit air membrane, the installation block is installed inside the installation frame by means of screws, and the suction head is inserted into the ventilation groove.

[0015] Preferably, the top pump suction filtering device includes an air intake port connected to the mounting block and air outlet one and air outlet two connected to corresponding air outlet pipe two, and the air intake port is connected to the interior of the foundation pit air membrane through the mounting block and the air intake head.

[0016] Preferably, the mounting block includes an air storage tank opened inside the mounting block, an air pump is fixedly installed on the side of the air storage tank, a transmission pipe is installed at the end of the air pump, and the air pump and the transmission pipe are both inside the mounting block.

[0017] Preferably, the suction head includes an air cylinder 1 fixedly installed under the mounting block and an air cylinder 2 fixedly installed under the air cylinder 1, the lower end of the air cylinder 2 is sleeved with a convex ring air bag, and the transmission pipe passes through the mounting block, air cylinder 1 and air cylinder 2 and is connected to the convex ring air bag.

[0018] Preferably, an annular groove is opened at the bottom of the second air cylinder, the convex ring airbag is sleeved inside the annular groove, a filter fan is movably installed on the inner top of the second air cylinder, a drive block is connected to the filter fan through an axis, a plurality of support columns are fixedly installed on the outside of the drive block, and one end of the plurality of support columns is connected to the inner wall of the second air cylinder.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The air filter device for foundation pit operation air film described in the present invention is transported to the interior of the lower stabilizing air bag through an air supply pipe, and the lower stabilizing air bag is inflated and expanded rapidly, thereby driving the foundation pit air film to lift up. After the interior of the lower stabilizing air bag is completely inflated, the gas that continues to be filled is input into the interior of the foundation pit air film through multiple oblique air inlet pipes, so that the foundation pit air film is inflated and expanded. At this time, the top pump suction filtering device is in a closed state, that is, the interior of the foundation pit air film is a sealed space. When the interior of the foundation pit air film is inflated and the air pressure becomes larger, the foundation pit air film will swell to form a bubble-shaped air film covering the entire foundation pit, and then air is continuously transported to the interior of the foundation pit air film through the cooperation of the air supply equipment and the air supply pipe, and the top pump suction filtering device is responsible for exhausting air, completing the air circulation inside the foundation pit air film and maintaining the bubble state of the foundation pit air film.

[0021] 2. The air filter device for foundation pit operation air film described in the present invention can drive fine dust to rise through the upward air input through the air inlet pipe, so that a large amount of dust is concentrated in the rising air. At this time, the top pump suction filter device at the top of the foundation pit air film can absorb the rising dust by suction. The top pump suction filter device is preferably a dust filter pump, and the concentrated dust is absorbed by the top pump suction filter device together with the air. The internal filtering structure of the top pump suction filter device will retain the dust, while the air is released through the air outlet pipe, and the top pump suction filter device can also be preferably a simple gas conveying device, which discharges the air containing dust through the air outlet pipe to the subsequent filtering structure, thereby increasing construction efficiency. Compared with traditional spray-type dust reduction methods, this solution can quickly remove dust, increase filtration efficiency, and consume less resources.

[0022] 3. The air filter device for foundation pit operation air film described in the present invention allows gas to enter the air supply cavity, and the gas inside the air supply cavity enters the horizontal air pipe and the vertical air pipe through multiple connecting pipes. The oblique air pipe network is in a shrunken state when not inflated, and is easy to transport together with the foundation pit air film. When the oblique air pipe network is filled with air, it will be in an inclined state, keeping the bottom of the foundation pit air film in a fixed state, thereby maintaining the bubble state of the foundation pit air film. The setting of the oblique air pipe network increases the stability of the foundation pit air film. After the oblique air pipe network is filled, the gas will be output from the top of the multiple vertical air pipes and enter the multiple corresponding air inlet pipes. At this time, the gas is input into the foundation pit air film through the air inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is an overall stereogram of the present invention;

[0025] Figure 2 It is a three-dimensional schematic diagram of the lower stable airbag in the present invention;

[0026] Figure 3 It is a three-dimensional schematic diagram of the oblique tracheal network in the present invention;

[0027] Figure 4 It is a three-dimensional schematic diagram of the buoyancy airbag and the air outlet assembly in the present invention;

[0028] Figure 5 It is a three-dimensional schematic diagram of the installation frame in the present invention;

[0029] Figure 6 It is a three-dimensional schematic diagram of the installation block in the present invention;

[0030] Figure 7 It is a three-dimensional schematic diagram of the convex ring airbag in the present invention;

[0031] Figure 8 It is a three-dimensional schematic diagram of the filter fan in the present invention.

[0032] In the figure: 1. foundation pit air film; 11. lower stabilizing air bag; 111. air supply cavity; 112. component cavity; 12. air inlet pipe; 13. oblique air pipe network; 131. vertical air pipe; 132. horizontal air pipe; 133. connecting pipe; 14. air film layer 1; 15. thermal insulation layer; 16. air film layer 2; 2. top pump suction and filtering device; 21. air inlet; 22. air outlet 1; 23. air outlet 2; 3. air supply equipment; 4. Air supply pipe; 5. Buoyancy airbag; 6. Air outlet assembly; 61. Air outlet pipe 1; 62. Air outlet pipe 2; 63. Solenoid valve pipeline; 7. Mounting block; 71. Air storage tank; 72. Air pump; 73. Transmission pipe; 8. Air suction head; 81. Air cylinder 1; 82. Air cylinder 2; 821. Annular groove; 83. Convex ring airbag; 84. Filter fan; 85. Drive block; 86. Support column; 9. Mounting frame; 91. Ventilation groove. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1-Figure 5 As shown, an air film air filtration device for foundation pit operation according to an embodiment of the present invention comprises a plurality of air supply devices 3 and an air supply pipe 4 installed on the side of the air supply device 3, a foundation pit air film 1 is covered on the foundation pit, one end of the plurality of air supply pipes 4 is connected to the foundation pit air film 1, a plurality of top pump suction filter devices 2 are installed above the foundation pit air film 1, a mounting block 7 is installed below the top pump suction filter device 2, and an air suction head 8 is installed below the mounting block 7;

[0036] A mounting frame 9 is fixedly installed on the foundation pit air film 1, a mounting block 7 is installed on the mounting frame 9, a suction head 8 penetrates the mounting frame 9 and extends to the inside of the foundation pit air film 1, and a pipe for exhausting air is arranged on the outside of the top pump suction filter device 2;

[0037] A lower stabilizing airbag 11 is fixedly installed inside the foundation pit air film 1, and the air supply pipe 4 passes through the foundation pit air film 1 and is connected to the lower stabilizing airbag 11. A plurality of air inlet pipes 12 are fixedly installed above the lower stabilizing airbag 11, and the air inlet pipes 12 are inclined toward the inside of the foundation pit air film 1.

[0038] Specifically, when the foundation pit work is carried out, the foundation pit is first covered with the foundation pit air film 1, and then the surrounding edge position of the foundation pit air film 1 is fixed and sealed. At this time, the inside of the foundation pit air film 1 is not inflated, and the top pump suction filter device 2 is taken. The top pump suction filter device 2 is installed on the installation frame 9 through the installation block 7, that is, at this time, the top pump suction filter device 2 is installed above the foundation pit air film 1, and air is supplied through the air supply equipment 3. At this time, the gas is transported to the inside of the lower stabilizing air bag 11 through the air supply pipe 4, and the lower stabilizing air bag 11 is inflated and expanded rapidly, thereby driving the foundation pit air film 1 to be lifted up, and the inside of the lower stabilizing air bag 11 is inflated After completion, the gas that continues to be filled is input into the interior of the foundation pit air film 1 through multiple oblique air inlet pipes 12, so that the foundation pit air film 1 is inflated. At this time, the top pump suction filtering device 2 is in a closed state, that is, the interior of the foundation pit air film 1 is a sealed space. When the air pressure inside the foundation pit air film 1 increases, the foundation pit air film 1 will swell to form a bubble-like air film covering the entire foundation pit, and then the air supply equipment 3 and the air supply pipe 4 will continuously supply air to the interior of the foundation pit air film 1, while the top pump suction filtering device 2 is responsible for exhausting air, completing the air circulation inside the foundation pit air film 1 and maintaining the bubble state of the foundation pit air film 1. After the air film 1 is inflated, construction can be carried out inside the foundation pit. The noise caused by the construction will be blocked by the foundation pit air film 1, and the dust generated by the construction will be sealed inside the foundation pit air film 1. The air film of the foundation pit needs to maintain a positive pressure inside the film at all times. Therefore, air will continue to be added to the inside of the foundation pit air film 1. At this time, the air continues to flow. During the construction process, the dust is easily driven by the flowing air, which causes the dust to scatter. In this device, the upward air input through the air inlet pipe 12 will drive the fine dust to rise, so that a large amount of dust is concentrated in the rising air. At this time, the top pump suction filter device 2 at the top of the foundation pit air film 1 can be The rising dust is absorbed by the suction, and the top pump suction filter device 2 is preferably a dust filter pump. The concentrated dust is absorbed by the top pump suction filter device 2 together with the air. The internal filtering structure of the top pump suction filter device 2 will retain the dust, and the air will be released through the air outlet pipe. The top pump suction filter device 2 can also be preferably a simple gas conveying device, which discharges the air containing dust through the air outlet pipe to the subsequent filtering structure, thereby increasing construction efficiency. Compared with traditional spray dust reduction methods, this solution can quickly remove dust, increase filtering efficiency, and consume less resources.

[0039] like Figure 2 As shown, the foundation pit air film 1 includes an air film layer 14 and an air film layer 16, a thermal insulation layer 15 is fixedly installed between the air film layer 14 and the air film layer 16, and the air supply pipe 4 passes through the air film layer 14, the thermal insulation layer 15 and the air film layer 16 and is connected to the lower stabilizing airbag 11.

[0040] Specifically, when the gas is transmitted through the gas supply pipe 4, the gas will also serve as a sound insulation medium, cooperating with the air film layer 14, the thermal insulation layer 15 and the air film layer 2 16 at this time to prevent the construction noise inside the foundation pit air film 1 from being transmitted to the outside, and the setting of the thermal insulation layer 15 can ensure a suitable temperature inside the foundation pit air film 1.

[0041] like Figure 3 As shown, the lower stabilizing airbag 11 has an air supply cavity 111 and a component cavity 112 . The air supply cavity 111 is connected to the air supply pipe 4 . An oblique air pipe network 13 is installed inside the component cavity 112 . The top of the oblique air pipe network 13 is connected to multiple air inlet pipes 12 .

[0042] The oblique air pipe network 13 includes a plurality of transverse air pipes 132 and a vertical air pipe 131 fixed inside the component cavity 112. The tops of the plurality of transverse air pipes 132 are connected to the corresponding air inlet pipes 12, and the lower ends of the plurality of transverse air pipes 132 are connected to the inner bottom wall of the component cavity 112. The plurality of transverse air pipes 132 and the vertical air pipes 131 are correspondingly connected, and both ends of the plurality of vertical air pipes 131 are connected to the inner wall of the component cavity 112. A plurality of connecting pipes 133 are fixedly installed on the side of the docking position between the transverse air pipes 132 and the vertical air pipes 131, and one end of the plurality of connecting pipes 133 is connected to the inside of the air supply cavity 111.

[0043] Specifically, the gas is transported through the air supply pipe 4, and the gas will first enter the air supply cavity 111, and the gas inside the air supply cavity 111 enters the horizontal air pipe 132 and the vertical air pipe 131 through multiple connecting pipes 133. The oblique air pipe network 13 is in a collapsed state when it is not inflated, and it is easy to transport together with the foundation pit air film 1. When the oblique air pipe network 13 is filled with air, it will be in an inclined state, keeping the bottom of the foundation pit air film 1 in a fixed state, thereby maintaining the bubble state of the foundation pit air film 1. The setting of the oblique air pipe network 13 increases the stability of the foundation pit air film 1. After the oblique air pipe network 13 is filled, the gas will be output from the top of the multiple vertical air pipes 131 and enter the multiple corresponding air inlet pipes 12. At this time, the gas is input into the foundation pit air film 1 through the air inlet pipe 12.

[0044] like Figure 4 As shown, a buoyancy airbag 5 is installed on the top of the top pump suction filtering device 2, and air outlet components 6 are installed on both sides of the buoyancy airbag 5. The air outlet component 6 includes an air outlet pipe 61 connected to the buoyancy airbag 5, and an electromagnetic valve pipe 63 is installed at the end of the air outlet pipe 61 close to the buoyancy airbag 5. An air outlet pipe 2 62 is installed on the side of the air outlet pipe 61, and one end of the air outlet pipe 2 62 is connected to the top pump suction filtering device 2.

[0045] Specifically, the top pumping and filtering device 2 is installed on the mounting frame 9 on the top of the foundation pit air film 1 through the mounting block 7, and the top pumping and filtering device 2 can be lifted up by inflating the inside of the foundation pit air film 1, so that the top pumping and filtering device 2 is always on the top of the foundation pit air film 1. In order to avoid the influence of the top pumping and filtering device 2 on the foundation pit air film 1, air can be first supplied to the inside of the air outlet pipe 61. At this time, the gas enters the buoyancy airbag 5 through the solenoid valve pipe 63, so that the shrunken buoyancy airbag 5 is inflated. At this time, the top pumping and filtering device 2 is in a closed state, and a steady stream of gas passes through the two outlets After the air pipe 61 is input into the buoyancy airbag 5, the electromagnetic valve pipe 63 is closed to make the interior of the buoyancy airbag 5 in a sealed space, and the air outlet pipe 61 no longer takes in air. The air pressure inside the buoyancy airbag 5 that is filled with air is relatively high, and buoyancy will be generated at this time, thereby reducing the downward pressure of the top pump suction filter device 2 on the foundation pit air membrane 1, and avoiding the gravity of the top pump suction filter device 2 from causing damage to the foundation pit air membrane 1. When the foundation pit air membrane 1 is inflated into a bubble state, the top pump suction filter device 2 works to extract the air containing dust inside the foundation pit air membrane 1, and the gas will be transported out through the air outlet pipe 2 62 and the air outlet pipe 1 61.

[0046] like Figure 5-Figure 6 As shown, a ventilation groove 91 is opened inside the mounting frame 9, and the ventilation groove 91 is connected to the inside of the foundation pit air membrane 1. The mounting block 7 is installed inside the mounting frame 9 by screw installation, and the suction head 8 is inserted into the ventilation groove 91.

[0047] The top pump suction filtering device 2 includes an air intake port 21 connected to the mounting block 7 and air outlets 1 22 and 23 connected to the corresponding air outlet pipes 2 62 . The air intake port 21 is connected to the interior of the foundation pit air membrane 1 through the mounting block 7 and the air intake head 8 .

[0048] Embodiment 2

[0049] like Figure 6-Figure 7 As shown, in contrast to Example 1, another embodiment of the present invention is: the mounting block 7 includes an air storage tank 71 opened inside the mounting block 7, an air pump 72 is fixedly installed on the side of the air storage tank 71, a transmission pipe 73 is installed at the end of the air pump 72, and both the air pump 72 and the transmission pipe 73 are inside the mounting block 7.

[0050] The suction head 8 includes an air cylinder 1 81 fixedly installed under the mounting block 7 and an air cylinder 2 82 fixedly installed under the air cylinder 1 81 . The lower end of the air cylinder 2 82 is sleeved with a convex ring air bag 83 . The transmission pipe 73 passes through the mounting block 7 , the air cylinder 1 81 , and the air cylinder 2 82 and is connected to the convex ring air bag 83 .

[0051] Specifically, after the suction head 8 is inserted into the ventilation groove 91, the convex ring airbag 83 is located inside the foundation pit air membrane 1. In order to increase the sealing performance between the suction head 8 and the foundation pit air membrane 1, the air inside the air storage groove 71 can be pumped out by the air pump 72. The gas is pumped into the transmission pipe 73 by the air pump 72 until it is input into the convex ring airbag 83. The convex ring airbag 83 is inflated. When the convex ring airbag 83 is in a convex ring state in its deflated state, it will not affect the insertion of the air cylinder 82. After the convex ring airbag 83 is inflated, the outer side of the deformed convex ring airbag 83 will be in close contact with the inner top wall of the foundation pit air membrane 1, thereby strengthening the sealing state and preventing a large amount of gas leakage from the outside of the suction head 8.

[0052] like Figure 8 As shown, an annular groove 821 is provided at the bottom of the second air cylinder 82, and the convex ring air bag 83 is sleeved inside the annular groove 821. A filter fan 84 is movably installed on the inner top of the second air cylinder 82, and a driving block 85 is connected to the filter fan 84 through an axis. A plurality of support columns 86 are fixedly installed on the outer side of the driving block 85, and one end of the plurality of support columns 86 is connected to the inner wall of the second air cylinder 82.

[0053] Specifically, when the construction inside the foundation pit air film 1 generates a lot of dust, the filter fan 84 can be driven by the driving block 85 to rotate the filter fan 84, thereby enhancing the air circulation efficiency inside the foundation pit air film 1 and replacing the air containing dust more quickly.

[0054] Working principle: When working on the foundation pit, first use the foundation pit air film 1 to cover the foundation pit, and then fix and seal the surrounding edge of the foundation pit air film 1. At this time, the inside of the foundation pit air film 1 is not inflated. Take the top pump suction filter device 2, and the top pump suction filter device 2 is installed on the installation frame 9 through the installation block 7. That is, at this time, the top pump suction filter device 2 is installed above the foundation pit air film 1, and gas is supplied through the gas supply device 3. At this time, the gas is transported to the inside of the lower stabilizing air bag 11 through the gas supply pipe 4, and the lower stabilizing air bag 11 is inflated and expanded rapidly, thereby driving the foundation pit air film 1 to jack up, and the inside of the lower stabilizing air bag 11 is inflated. After the air is exhausted, the gas that continues to be filled is input into the interior of the foundation pit air film 1 through a plurality of oblique air inlet pipes 12, so that the foundation pit air film 1 is inflated. At this time, the top pump suction and filtering device 2 is in a closed state, that is, the interior of the foundation pit air film 1 is a sealed space. When the air pressure inside the foundation pit air film 1 increases, the foundation pit air film 1 will swell to form a bubble-like air film covering the entire foundation pit, and then the air supply equipment 3 and the air supply pipe 4 will continuously supply air to the interior of the foundation pit air film 1, while the top pump suction and filtering device 2 is responsible for exhausting air, completing the air circulation inside the foundation pit air film 1 and maintaining the bubble state of the foundation pit air film 1. After the membrane 1 is inflated, construction can be carried out inside the foundation pit. The noise caused by the construction will be blocked by the foundation pit air membrane 1, and the dust generated by the construction will be sealed inside the foundation pit air membrane 1. The air membrane of the foundation pit needs to maintain positive pressure inside the membrane at all times. Therefore, air will continue to be added to the inside of the foundation pit air membrane 1. At this time, the air continues to flow. During the construction process, dust is easily driven by the flowing air, which in turn causes the dust to scatter. In this device, the upward air input through the air inlet pipe 12 will drive the fine dust to rise, so that a large amount of dust is concentrated in the rising air. At this time, the top pump suction filter device 2 at the top of the foundation pit air membrane 1 can pass The rising dust is absorbed by the suction, and the top pump suction filter device 2 is preferably a dust filter pump. The concentrated dust is absorbed by the top pump suction filter device 2 together with the air. The internal filtering structure of the top pump suction filter device 2 will retain the dust, and the air will be released through the air outlet pipe. The top pump suction filter device 2 can also be preferably a simple gas conveying device, which discharges the air containing dust through the air outlet pipe to the subsequent filtering structure, thereby increasing construction efficiency. Compared with traditional spray dust reduction methods, this solution can quickly remove dust, increase filtering efficiency, and consume less resources.

[0055] The gas is transported through the air supply pipe 4, and the gas will first enter the air supply cavity 111, and the gas inside the air supply cavity 111 enters the horizontal air pipe 132 and the vertical air pipe 131 through multiple connecting pipes 133. The oblique air pipe network 13 is in a collapsed state when not inflated, and it is easy to transport together with the foundation pit air film 1. When the oblique air pipe network 13 is filled with air, it will be inclined, keeping the bottom of the foundation pit air film 1 in a fixed state, thereby maintaining the bubble state of the foundation pit air film 1. The setting of the oblique air pipe network 13 increases the stability of the foundation pit air film 1. After the oblique air pipe network 13 is filled, the gas will be output from the top of the multiple vertical air pipes 131 and enter the multiple corresponding air inlet pipes 12. At this time, the gas is input into the foundation pit air film 1 through the air inlet pipe 12.

[0056] The top pumping and filtering device 2 is installed on the mounting frame 9 at the top of the foundation pit air film 1 through the mounting block 7. The top pumping and filtering device 2 can be lifted up by inflating the inside of the foundation pit air film 1, so that the top pumping and filtering device 2 is always at the top of the foundation pit air film 1. In order to avoid the influence of the top pumping and filtering device 2 on the foundation pit air film 1, air can be first supplied to the inside of the air outlet pipe 61. At this time, the gas enters the buoyancy airbag 5 through the solenoid valve pipe 63, so that the shrunken buoyancy airbag 5 is inflated. At this time, the top pumping and filtering device 2 is in a closed state, and a steady stream of gas passes through the two air outlet pipes. After the air 61 is input into the buoyancy airbag 5, the electromagnetic valve pipe 63 is closed to make the interior of the buoyancy airbag 5 in a sealed space, and the air outlet pipe 61 no longer takes in air. The air pressure inside the buoyancy airbag 5 that is filled with air is relatively high, and buoyancy will be generated at this time, thereby reducing the downward pressure of the top pump suction filter device 2 on the foundation pit air membrane 1, and avoiding the gravity of the top pump suction filter device 2 from causing damage to the foundation pit air membrane 1. When the foundation pit air membrane 1 is inflated into a bubble state, the top pump suction filter device 2 works to extract the air containing dust inside the foundation pit air membrane 1, and the gas will be transported out through the air outlet pipe 2 62 and the air outlet pipe 1 61.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An air film air filtration device for foundation pit operation, comprising a plurality of air supply devices (3) and air supply pipes (4) installed on the side of the air supply devices (3), the foundation pit is covered with a foundation pit air film (1), one end of the plurality of air supply pipes (4) is connected to the foundation pit air film (1), characterized in that: A plurality of top pumping and filtering devices (2) are installed above the foundation pit air membrane (1), a mounting block (7) is installed below the top pumping and filtering device (2), and a suction head (8) is installed below the mounting block (7); A mounting frame (9) is fixedly mounted on the foundation pit air film (1), the mounting block (7) is mounted on the mounting frame (9), the air suction head (8) penetrates the mounting frame (9) and extends to the interior of the foundation pit air film (1), and a pipe for air outlet is arranged on the outside of the top pump suction and filtering device (2); A lower stabilizing airbag (11) is fixedly installed inside the foundation pit air film (1), the air supply pipe (4) passes through the foundation pit air film (1) and is connected to the lower stabilizing airbag (11), and a plurality of air inlet pipes (12) are fixedly installed above the lower stabilizing airbag (11), and the air inlet pipes (12) are inclined toward the inside of the foundation pit air film (1).

2. The air film air filtration device for foundation pit operations according to claim 1 is characterized in that: The foundation pit air film (1) comprises an air film layer 1 (14) and an air film layer 2 (16), a thermal insulation layer (15) is fixedly installed between the air film layer 1 (14) and the air film layer 2 (16), and the air supply pipe (4) passes through the air film layer 1 (14), the thermal insulation layer (15) and the air film layer 2 (16) and is connected to the lower stabilizing air bag (11).

3. The air film air filtration device for foundation pit operations according to claim 1, characterized in that: The lower stabilizing airbag (11) is provided with an air supply cavity (111) and a component cavity (112) therein; the air supply cavity (111) is connected to the air supply pipe (4); an oblique air pipe network (13) is installed inside the component cavity (112); the top of the oblique air pipe network (13) is connected to a plurality of air inlet pipes (12).

4. The air film air filtration device for foundation pit operations according to claim 3 is characterized in that: The oblique air pipe network (13) comprises a plurality of transverse air pipes (132) and a vertical air pipe (131) fixed inside the component cavity (112); the tops of the plurality of transverse air pipes (132) are connected to the corresponding air inlet pipes (12); the lower ends of the plurality of transverse air pipes (132) are connected to the inner bottom wall of the component cavity (112); the plurality of transverse air pipes (132) and the vertical air pipes (131) are connected correspondingly; the two ends of the plurality of vertical air pipes (131) are connected to the inner wall of the component cavity (112); a plurality of connecting pipes (133) are fixedly installed on the side of the docking position of the transverse air pipes (132) and the vertical air pipes (131); one end of the plurality of connecting pipes (133) is connected to the inside of the air supply cavity (111).

5. The air film air filtration device for foundation pit operations according to claim 1, characterized in that: A buoyancy airbag (5) is installed on the top of the top pump suction filter device (2), and air outlet components (6) are installed on both sides of the buoyancy airbag (5). The air outlet component (6) includes an air outlet pipe (61) connected to the buoyancy airbag (5), and an electromagnetic valve pipeline (63) is installed at the end of the air outlet pipe (61) close to the buoyancy airbag (5). An air outlet pipe (62) is installed on the side of the air outlet pipe (61), and one end of the air outlet pipe (62) is connected to the top pump suction filter device (2).

6. The air film air filtration device for foundation pit operations according to claim 1, characterized in that: A ventilation groove (91) is provided inside the installation frame (9), and the ventilation groove (91) is connected to the inside of the foundation pit air membrane (1). The installation block (7) is installed inside the installation frame (9) by means of screws, and the suction head (8) is inserted into the ventilation groove (91).

7. The air film air filtration device for foundation pit operations according to claim 5, characterized in that: The top pump suction filtering device (2) comprises an air intake port (21) connected to the mounting block (7) and an air outlet port 1 (22) and an air outlet port 2 (23) connected to the corresponding air outlet pipe 2 (62); the air intake port (21) is connected to the interior of the foundation pit air membrane (1) via the mounting block (7) and the air intake head (8).

8. The air film air filtration device for foundation pit operations according to claim 7, characterized in that: The mounting block (7) comprises an air storage tank (71) opened inside the mounting block (7), an air pump (72) is fixedly mounted on the side of the air storage tank (71), a transmission pipe (73) is mounted on the end of the air pump (72), and both the air pump (72) and the transmission pipe (73) are located inside the mounting block (7).

9. The air film air filtration device for foundation pit operations according to claim 8, characterized in that: The air suction head (8) comprises an air cylinder 1 (81) fixedly mounted below the mounting block (7) and an air cylinder 2 (82) fixedly mounted below the air cylinder 1 (81), the lower end of the air cylinder 2 (82) being sleeved with a convex ring air bag (83), and the transmission pipe (73) passing through the mounting block (7), the air cylinder 1 (81) and the air cylinder 2 (82) being connected to the convex ring air bag (83).

10. The air film air filtration device for foundation pit operations according to claim 9, characterized in that: An annular groove (821) is provided at the bottom of the second air cylinder (82), and the convex ring air bag (83) is sleeved inside the annular groove (821). A filter fan (84) is movably installed at the inner top of the second air cylinder (82), and a driving block (85) is connected to the top of the filter fan (84) through an axis. A plurality of support columns (86) are fixedly installed on the outer side of the driving block (85), and one end of the plurality of support columns (86) is connected to the inner wall of the second air cylinder (82).

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