An air film air filtration device for foundation pit operations

Abstract

The present invention belongs to the technical field of air film filtering devices for foundation pits, specifically an air film air filtering device for foundation pit operations, comprising multiple air supply devices and air supply pipes installed on the sides of the air supply devices, the foundation pit is covered with a foundation pit air film, one end of the multiple air supply pipes is connected to the foundation pit air film, multiple top pump suction and filtering devices are installed above the foundation pit air film, a mounting block is installed below the top pump suction and filtering device, and an air suction head is installed below the mounting block. The top pump suction and filtering device at the top of the foundation pit air film can absorb the rising dust by suction, and the top pump suction and filtering device is preferably a dust filter pump, and the concentrated dust is absorbed by the top pump suction and filtering device together with the air, and the internal filtering structure of the top pump suction and filtering device will retain the dust, while the air is released through the air outlet pipe. Compared with traditional spray-type dust reduction methods, this solution can quickly remove dust, increase filtration efficiency, and consume less resources.

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 conducting foundation pit work in densely populated areas, to prevent disturbances and the spread of dust, an air membrane is placed over the site where the work is to be done. This membrane utilizes an inflation principle to form a protective structure. Specifically, air is injected into a specially formulated membrane material, causing it to expand and form a stable support structure that surrounds the foundation pit, providing safe and reliable protection for the construction work. This structure maintains an air pressure differential between the inside and outside of the membrane, creating an enclosed space that isolates dust and reduces construction noise.

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

[0004] In traditional technical solutions, an air membrane is required to be placed outside the construction pit to prevent the occurrence of dust that disturbs residents in residential areas. However, the air membrane of the pit needs to maintain positive pressure inside the membrane at all times, that is, air is supplied through an external air supply device, and then the air in the pit air membrane is released to achieve air circulation. Therefore, air will continue to be added to the inside of the pit air membrane, and the air will continue to flow. During the construction process, dust is easily driven by the flowing air, causing 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 its technical problem is as follows: the air film air filtration device for foundation pit operation described in the present invention includes multiple 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 multiple air supply pipes is connected to the foundation pit air film, multiple top pump suction and filtering devices are installed above the foundation pit air film, a mounting block is installed below the top pump suction and filtering 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 suction head passes through the mounting frame and extends to the interior of the foundation pit air film, and a pipe for air outlet is provided 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 air film layer 1 and 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 air bag.

[0011] Preferably, an air supply cavity and a component cavity are provided inside the lower stabilizing airbag, the air supply cavity is connected to 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 to 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 the 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, and a plurality of connecting pipes are fixedly installed on the side of the docking position of the transverse air pipes and the vertical air pipes, and one end of the plurality of connecting pipes is connected to the inside of the air supply cavity.

[0013] Preferably, a buoyancy airbag is installed on the top of the top pump suction and 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 and 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 screw installation, and the suction head is inserted into the ventilation groove.

[0015] Preferably, the top pump suction filtering device includes an air intake connected to the mounting block and air outlet one and air outlet two connected to the corresponding air outlet pipe two, and the air intake 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 below the mounting block and an air cylinder 2 fixedly installed below 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 provided at the bottom of the second air cylinder, the convex ring airbag is sleeved inside the annular groove, a filter fan is movably installed at the inner top of the second air cylinder, a drive block is connected to the top of 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 the 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 fully 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 and 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 higher, the foundation pit air film will swell to form a bubble-shaped air film covering the entire foundation pit, and then the air supply equipment and the air supply pipe are used to continuously transport air to the interior of the foundation pit air film, and the top pump suction and 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 film air filter device for foundation pit operations described in the present invention, which inputs air upward through the air inlet pipe, will drive fine dust to rise, so that a large amount of dust will be 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, and the air will be released through the air outlet pipe. The top pump suction filter device can also be preferably a simple gas conveying device, which discharges the air containing dust into the subsequent filtering structure through the air outlet pipe, 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 it is not inflated, and it is easy to transport together with the foundation pit air film. When the oblique air pipe network is filled with air and expanded, 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 multiple vertical air pipes and enter 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 with reference to 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 stabilizing 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 of 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 mounting 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] 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 pumping 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 pipe; 7. Mounting block; 71. Air storage tank; 72. Air pump; 73. Transmission pipe; 8. 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 easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0034] Example 1

[0035] like Figure 1-Figure 5 As shown, an air film air filtration device for foundation pit operations according to an embodiment of the present invention includes multiple 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 multiple air supply pipes 4 is connected to the foundation pit air film 1. Multiple top pump suction and filtering devices 2 are installed above the foundation pit air film 1. A mounting block 7 is installed below the top pump suction and filtering device 2. 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, and a mounting block 7 is installed on the mounting frame 9. An air suction head 8 passes through the mounting frame 9 and extends to the interior of the foundation pit air film 1. A pipe for air outlet is provided on the outside of the top pump suction and filtering 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 carrying out foundation pit work, first use the foundation pit air film 1 to cover the foundation pit, and then fix and seal the edge position of the foundation pit air film 1. At this time, the interior of the foundation pit air film 1 is not inflated, and the top pump suction filter device 2 is taken out. The top pump suction filter device 2 is installed on the mounting frame 9 through the mounting 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 interior 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 jack up, and the interior 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 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-shaped air film covering the entire foundation pit, and then the air supply equipment 3 and the air supply pipe 4 are used to 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 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 foundation pit air film needs to maintain 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 on the top of the foundation pit air film 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 is 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 to increase construction efficiency. Compared with traditional spray dust reduction methods, this solution can quickly remove dust, increase filtration 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 2 16, and a thermal insulation layer 15 is fixedly installed between the air film layer 14 and the air film layer 2 16. The air supply pipe 4 passes through the air film layer 14, the thermal insulation layer 15 and the air film layer 2 16 and is connected to the lower stabilizing air bag 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 world, 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, an air supply cavity 111 and a component cavity 112 are provided inside the lower stabilizing airbag 11. 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 multiple horizontal air pipes 132 and vertical air pipes 131 fixed inside the component cavity 112. The tops of the multiple horizontal air pipes 132 are connected to the corresponding air inlet pipes 12, and the lower ends of the multiple horizontal air pipes 132 are connected to the bottom wall of the component cavity 112. The multiple horizontal air pipes 132 and the vertical air pipes 131 are connected correspondingly, and the two ends of the multiple vertical air pipes 131 are connected to the inner wall of the component cavity 112. Multiple connecting pipes 133 are fixedly installed on the side of the docking position of the horizontal air pipes 132 and the vertical air pipes 131, and one end of the multiple 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 shrunken 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 and expanded, 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 and 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 1 61 connected to the buoyancy airbag 5, and an electromagnetic valve pipe 63 is installed at the end of the air outlet pipe 1 61 close to the buoyancy airbag 5. An air outlet pipe 2 62 is installed on the side of the air outlet pipe 1 61, and one end of the air outlet pipe 2 62 is connected to the top pump suction and 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. 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, so that the interior of the buoyancy airbag 5 is 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. At this time, 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 21 connected to the mounting block 7 and air outlet 1 22 and air outlet 2 23 connected to the corresponding air outlet pipe 2 62. The air intake 21 is connected to the interior of the foundation pit air film 1 through the mounting block 7 and the air suction head 8.

[0048] Example 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 the air pump 72 and the transmission pipe 73 are both 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, when 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 in the air storage tank 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 the collapsed 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 from leaking 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 top of the filter fan 84 through an axis. A plurality of support columns 86 are fixedly installed on the outside 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 there is a lot of dust generated by the construction inside the foundation pit air film 1, the filter fan 84 can be driven by the driving block 85, so that the filter fan 84 can rotate, 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 edge position 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 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 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 multiple 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-shaped air film covering the entire foundation pit, and then the air supply equipment 3 and the air supply pipe 4 are cooperated to 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 foundation pit air membrane 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 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 on 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 is 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 to increase construction efficiency. Compared with traditional spray dust reduction methods, this solution can quickly remove dust, increase filtration 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 shrunken 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 and expanded, 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.

[0056] 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. 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 air outlet pipes After the air is input into the buoyancy airbag 5 by one 61, the electromagnetic valve pipe 63 is closed, so that the interior of the buoyancy airbag 5 is in a sealed space, and the air outlet pipe one 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. At this time, the gas will be transported out through the air outlet pipe two 62 and the air outlet pipe one 61.

[0057] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An air film air filtration device for foundation pit operations, comprising a plurality of air supply devices (3) and air supply pipes (4) installed on the sides of the air supply devices (3), a foundation pit air film (1) covering the foundation pit, and one end of the plurality of air supply pipes (4) being 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 film (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) passes through the mounting frame (9) and extends to the interior of the foundation pit air film (1), and a pipe for air outlet is provided on the outside of the top pump suction and filtering device (2); A lower stabilizing air bag (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 air bag (11), and a plurality of air inlet pipes (12) are fixedly installed above the lower stabilizing air bag (11), and the air inlet pipes (12) are tilted toward the inside of the foundation pit air film (1); A buoyancy air bag (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 air bag (5). The air outlet component (6) includes an air outlet pipe (61) connected to the buoyancy air bag (5), and an electromagnetic valve pipe (63) is installed at the end of the air outlet pipe (61) close to the buoyancy air bag (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); The top pump suction filtering device (2) includes an air intake (21) connected to the mounting block (7) and an air outlet 1 (22) and an air outlet 2 (23) connected to the corresponding air outlet pipe 2 (62). The air intake (21) is connected to the interior of the foundation pit air film (1) through the mounting block (7) and the air intake head (8); The mounting block (7) includes an air storage tank (71) provided 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); 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).

2. The air film air filtration device for foundation pit operations according to claim 1, characterized in that: The foundation pit air film (1) includes 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: An air supply cavity (111) and a component cavity (112) are provided inside the lower stabilizing air bag (11), 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), and 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, characterized in that: The oblique air pipe network (13) comprises a plurality of transverse air pipes (132) and vertical air pipes (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 correspondingly connected; 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 ventilation groove (91) is provided through the interior of the mounting frame (9), and the ventilation groove (91) is connected to the interior of the foundation pit air membrane (1). The mounting block (7) is mounted inside the mounting frame (9) by screw mounting, and the suction head (8) is inserted into the ventilation groove (91).

6. The air film air filtration device for foundation pit operations according to claim 1, characterized in that: An annular groove (821) is provided below 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 top of the filter fan (84) through an axis. A plurality of support columns (86) are fixedly installed on the outside 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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