House building foundation non-electricity pneumatic precipitation device

Abstract

This invention belongs to the field of building construction technology, and specifically relates to a non-electrified pneumatic dewatering device for building foundations. It includes an air storage tank, a controller connected to the side wall of the tank, a support frame connected to the side wall of the tank, and an air compressor connected to the upper side wall of the support frame. This fully automated pneumatic dewatering technology can complete foundation pit dewatering tasks with high quality and quantity, offering significant economic and environmental benefits. It not only powerfully promotes the improvement of project technological efficiency and green construction standards, but also demonstrates high promotional value in improving energy efficiency and upgrading the automation level of engineering construction. It can be widely applied under different geological and hydrological conditions and continuously optimized and improved to fully release the core functional value of fully automated pneumatic dewatering technology in the field of engineering dewatering.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a non-electrified pneumatic rainwater removal device for building foundations. Background Technology

[0002] In the construction of foundation pits for building foundation engineering, dewatering is a key link to ensure construction safety and progress. Traditional dewatering methods mostly use mechanical or manual dewatering, which have problems such as low construction efficiency, large investment in electrical equipment and cables, and prominent safety hazards of underwater electricity use. Especially under complex geological and hydrological conditions, traditional dewatering pumps are easily affected by fluctuations in water output, have high energy consumption and are difficult to control in terms of quality, making them unsuitable for the dewatering needs of deep foundation pits (such as underground two-story pits with a depth of 9.4m). At the same time, the lack of unified construction technical standards restricts the efficient progress of project construction.

[0003] Currently, fully automated pneumatic dewatering technology is relatively mature in developed countries such as Europe and the United States, but it is still in its initial stage in my country. The research on related construction technologies lacks in-depth process analysis and engineering case support. In practical applications, existing pneumatic dewatering devices face challenges such as insufficient geological adaptability. The condensate in the compressed air of the storage tank contains moisture, oil, and salt. In particular, the groundwater in Tianjin has a high salt content, which may be introduced with the air and accumulate on the inner wall of the tank over a long period of time. This can cause electrochemical corrosion, forming rust layers and pits. Long-term corrosion will lead to a gradual reduction in the thickness of the tank wall and a decrease in load-bearing capacity. When the wall thickness is below the safety threshold, the tank may bulge, rupture, or even explode under high pressure.

[0004] To address this issue, a non-electrified pneumatic dewatering device for building foundations is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a non-electrified pneumatic rainmaking device for building foundations.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a non-electrified pneumatic dewatering device for building foundations, comprising a gas storage tank, a controller connected to the side wall of the gas storage tank, a support frame connected to the side wall of the gas storage tank, an air compressor connected to the upper side wall of the support frame, the air outlet of the air compressor being connected to the gas storage tank, and further comprising:

[0007] A well is located on one side of the gas storage tank. A gas transmission pipe is connected to the side wall of the gas storage tank near the well. The end of the gas transmission pipe away from the gas storage tank is located inside the well and is connected to a pneumatic reciprocating drainage pump. The outlet end of the pneumatic reciprocating drainage pump is connected to a drainage pipe. A connecting assembly is used to connect the top cover to the upper port of the gas storage tank, and a cleaning assembly is connected to the side wall of the top cover; A drying assembly, located at the air inlet of the air compressor, is used for drying the gas.

[0008] In the aforementioned non-electrified pneumatic dewatering device for building foundations, the connecting assembly includes a connecting ring fixedly sleeved on the outer wall of the gas storage tank and the top cover. The side wall of the connecting ring is sleeved with multiple limiting frames. The side wall of the limiting frame is provided with limiting holes, and limiting pins are inserted into the limiting holes. The side walls of both connecting rings are provided with vertical holes that match the limiting pins. The upper end of the limiting pin is fixedly connected to a pull plate, and the pull plate and the limiting frame are fixedly connected with the same spring.

[0009] In the aforementioned non-electrified pneumatic dewatering device for building foundations, the cleaning component includes a cylinder fixedly connected to the upper side wall of a cover. A linear screw module is fixedly connected to the inner wall of the cylinder. A bent rod is fixedly connected to the moving end of the linear screw module. The bent rod has an inverted L-shaped structure. A reduction motor is connected to the lower end of the bent rod via a bracket. A rotating seat is fixedly connected to the output end of the reduction motor. Multiple crossbars are fixedly connected to the outer wall of the rotating seat. The ends of the multiple crossbars away from the rotating seat are fixedly connected to the same scraper ring. A rotating cylinder is rotatably connected to the lower end of the air tank via a sealed bearing. The lower end of the rotating cylinder has an open structure. A scraper is connected to the upper end of the rotating cylinder via a bracket. A water collection hood is fixedly connected to the lower side wall of the air tank. A drive motor is connected to the side wall of the water collection hood via a bracket. The drive motor is connected to the rotating cylinder via a gear ring transmission assembly. Multiple water inlets are opened on the side wall of the rotating cylinder. A detection component is provided inside the scraper ring.

[0010] In the aforementioned non-electrified pneumatic dewatering device for building foundations, the detection component includes an annular groove formed on the outer wall of a scraper ring. The groove wall is rotatably connected to a rotating ring via a bearing. A servo motor is connected to the side wall of the rotating ring. The output end of the servo motor is connected to the annular groove via a gear ring transmission assembly. A small electric push rod is connected to the side wall of the rotating ring. The output end of the small electric push rod is connected to a detection probe. The detection probe is electrically connected to a controller.

[0011] In the above-mentioned non-electrified pneumatic dewatering device for building foundations, the drying component includes a telescopic pipe connected to the air inlet of an air compressor. The lower end of the telescopic pipe is fixedly connected to a connecting cover. A drying cylinder is threadedly connected to the outer wall of the connecting cover. The drying cylinder is filled with a desiccant. A gravity sensor is fixedly connected to the lower side wall of the support frame. The detection end of the gravity sensor is connected to the connecting cover through a hook mechanism.

[0012] In the above-mentioned non-electrified pneumatic dewatering device for building foundation, a baffle is fixedly connected to the inner wall of the upper cover, and a circular hole matching the bent rod is opened on the side wall of the baffle. A scraper ring is fixedly connected to the inner wall of the circular hole, and the bent rod passes through the scraper ring.

[0013] In the above-mentioned non-electrified pneumatic dewatering device for building foundations, multiple indicator lights are vertically distributed on the outer wall of the cylinder, a metal plate is fixedly connected to the wall of the bent rod, the metal plate is electrically connected to an external power source, and multiple metal blocks corresponding to the indicator lights are fixedly connected to the inner wall of the cylinder, the metal blocks are electrically connected to the corresponding indicator lights through a controller.

[0014] In the aforementioned non-electrified pneumatic dewatering device for building foundations, the side wall of the water collection hood is connected to a sewage pipe, and the end of the sewage pipe is threadedly connected to a cap.

[0015] Compared with existing technologies, the advantages of a non-electrified pneumatic dewatering device for building foundations are: 1. Through the installation of air storage tanks, controllers, support frames, air compressors, wells, air transmission pipes, pneumatic reciprocating drainage pumps, and drainage pipes, the fully automated pneumatic dewatering technology can complete the foundation pit dewatering and drainage tasks with high quality and quantity. The economic and environmental benefits are particularly significant. It not only powerfully promotes the improvement of the project's technological innovation and green and civilized construction level, but also demonstrates extremely high promotional value in improving energy utilization efficiency and upgrading the degree of automation in engineering construction. It can be widely applied under different geological and hydrological conditions and continuously optimized and improved to fully release the core functional value of fully automated pneumatic dewatering technology in the field of engineering dewatering and drainage.

[0016] 2. Through the set cleaning components, the device automatically cleans the condensate on the side wall of the gas storage tank after a period of use. This effectively avoids the electrochemical corrosion of the tank caused by the long-term accumulation of condensate containing moisture, oil, and salt, reducing the risk of rust, pitting, and wall thinning, ensuring the structural strength and operational safety of the gas storage tank, and extending the service life of the equipment. At the same time, it can maintain the effective gas storage volume of the gas storage tank, avoid pressure fluctuations affecting the pressure stability and water output efficiency of pneumatic dewatering, reduce the probability of failures such as drain valve blockage and safety accessory malfunction caused by condensate, reduce equipment maintenance costs and downtime losses, and take into account the requirements of construction safety, economy, and green environmental protection, thus helping to promote the efficient and continuous advancement of pneumatic dewatering operations in building foundation engineering.

[0017] 3. Through the set detection components, the system simultaneously detects the wear of the inner wall while automatically cleaning the condensate on the side wall of the gas storage tank. This not only prevents rust, pitting, and wall thinning caused by electrochemical corrosion by promptly draining condensate containing moisture, oil, and salt, thus ensuring the structural safety and operational stability of the tank and extending its service life, but also allows for real-time monitoring of inner wall wear, coating damage, and weld defects. This enables early detection, early warning, and early handling of corrosion and mechanical damage, preventing minor issues from escalating into major safety accidents such as tank rupture and explosion. Furthermore, it reduces downtime losses due to equipment failure, lowers maintenance costs and emergency response risks, and balances the efficiency, safety, and economy of pneumatic dewatering operations, providing dual protection for the continuous and stable construction of building foundation projects.

[0018] 4. The installed drying components can detect the weight of the desiccant at the air compressor inlet, enabling real-time monitoring of the desiccant's saturation level for adsorbing moisture, salt, and other impurities. This allows for timely assessment of whether the dehumidification efficiency has decreased, preventing excessive moisture and salt levels in the compressed air from entering the storage tank due to desiccant failure. This reduces problems such as electrochemical corrosion of the tank, blockage of the drain valve, and wear of core components in pneumatic dehumidification systems. Simultaneously, it allows for precise control of desiccant replacement timing, avoiding material waste from premature replacement or equipment failure caused by exceeding the desiccant's lifespan. This reduces maintenance costs and downtime risks, ensuring stable compressed air quality and providing crucial support for the efficient, safe, and continuous operation of pneumatic dehumidification in building foundation engineering. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a non-electrified pneumatic precipitation device for building foundations provided by the present invention; Figure 2 This is a schematic diagram of the internal structure of the gas storage tank in a non-electrified pneumatic precipitation device for building foundations provided by the present invention; Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 yes Figure 2 Enlarged schematic diagram of part B in the middle; Figure 5 yes Figure 2 An enlarged schematic diagram of section C.

[0020] In the diagram: 1. Gas storage tank; 2. Controller; 3. Support frame; 4. Air compressor; 5. Pipe well; 6. Gas transmission pipe; 7. Pneumatic reciprocating drainage pump; 8. Drain pipe; 9. Top cover; 10. Connecting assembly; 101. Connecting ring; 102. Limiting frame; 11. Limiting pin; 12. Pull plate; 13. Cleaning assembly; 131. Cylinder; 132. Linear screw module; 14. Bending rod; 15. Gear motor; 16. Rotary seat; 17. Crossbar; 18. Scraper ring; 19. Rotary drum; 20. Scraper; 21. Water collection cover; 22. Drive motor; 23. Detection component; 231. Annular groove; 232. Rotating ring; 24. Servo motor; 25. Small electric push rod; 26. Detection probe; 27. Drying component; 271. Telescopic tube; 272. Connecting cover; 28. Drying cylinder; 29. ​​Desiccant; 30. Gravity sensor; 31. Baffle; 32. Scraper ring; 33. Indicator light; 34. Metal plate; 35. Metal block; 36. Drain pipe; 37. Cap. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] like Figures 1-5 As shown, a non-electrified pneumatic dewatering device for building foundations includes an air storage tank 1, a controller 2 connected to the side wall of the air storage tank 1, a support frame 3 connected to the side wall of the air storage tank 1, an air compressor 4 connected to the upper side wall of the support frame 3, and the air outlet of the air compressor 4 connected to the air storage tank 1. It also includes: Well 5 is located on one side of gas storage tank 1. Gas storage tank 1 is connected to the side wall of well 5 via gas transmission pipe 6. The end of gas transmission pipe 6 away from gas storage tank 1 is located inside well 5 and is connected to pneumatic reciprocating drainage pump 7. The outlet end of pneumatic reciprocating drainage pump 7 is connected to drainage pipe 8. The connecting component 10 connects the upper cover 9 to the upper port of the gas storage tank 1. The side wall of the upper cover 9 is connected to the cleaning component 13. Drying assembly 27 is located at the air inlet of air compressor 4 and is used for drying gas.

[0023] The connecting assembly 10 includes a connecting ring 101 fixedly sleeved on the outer wall of the gas storage tank 1 and the upper cover 9. Multiple limiting frames 102 are sleeved on the side wall of the connecting ring 101. Limiting holes are opened on the side wall of the limiting frame 102, and limiting pins 11 are inserted into the limiting holes. The side walls of the two connecting rings 101 are each opened with vertical holes that match the limiting pins 11. A pull plate 12 is fixedly connected to the upper end of the limiting pin 11. The same spring is fixedly connected between the pull plate 12 and the limiting frame 102.

[0024] The cleaning assembly 13 includes a cylinder 131 fixedly connected to the upper side wall of the cover 9. A linear screw module 132 is fixedly connected to the inner wall of the cylinder 131. A bent rod 14 with an inverted L-shaped structure is fixedly connected to the moving end of the linear screw module 132. A reduction motor 15 is connected to the lower end of the bent rod 14 via a bracket. A rotating seat 16 is fixedly connected to the output end of the reduction motor 15. Multiple crossbars 17 are fixedly connected to the outer wall of the rotating seat 16. The ends of the multiple crossbars 17 away from the rotating seat 16 are fixedly connected to the same scraper ring 18. A rotating cylinder 19 is rotatably connected to the lower end of the gas storage tank 1 via a sealed bearing. The lower end of the rotating cylinder 19 has an open structure. A scraper 20 is connected to the upper end of the rotating cylinder 19 via a bracket. A water collection hood 21 is fixedly connected to the lower side wall of the gas storage tank 1. A drive motor 22 is connected to the side wall of the water collection hood 21 via a bracket. The motor 22 is connected to the rotating drum 19 via a gear ring transmission assembly. The rotating drum 19 has multiple water inlet holes on its side wall. The scraper ring 18 contains a detection component 23, which automatically cleans the condensate on the side wall of the gas storage tank after a period of use. This effectively avoids the electrochemical corrosion of the tank caused by the long-term accumulation of condensate containing moisture, oil, and salt, reduces the risk of rust, pitting, and wall thinning, ensures the structural strength and operational safety of the gas storage tank, and extends the service life of the equipment. At the same time, it can maintain the effective gas storage volume of the gas storage tank, avoid pressure fluctuations affecting the pressure stability and water output efficiency of pneumatic dewatering, reduce the probability of failures such as drain valve blockage and safety accessory malfunction caused by condensate, reduce equipment maintenance costs and downtime losses, and take into account the requirements of construction safety, economy, and green environmental protection, thus helping to promote the efficient and continuous advancement of pneumatic dewatering operations in building foundation engineering.

[0025] The detection component 23 includes an annular groove 231 formed on the outer wall of the scraper ring 18. A rotating ring 232 is rotatably connected to the groove wall of the annular groove 231 via a bearing. A servo motor 24 is connected to the side wall of the rotating ring 232. The output end of the servo motor 24 is connected to the annular groove 231 via a gear ring transmission assembly. A small electric push rod 25 is connected to the side wall of the rotating ring 232. A detection probe 26 is connected to the output end of the small electric push rod 25. The detection probe 26 is electrically connected to the controller 2. This allows for simultaneous detection of wear on the inner wall while automatically cleaning condensate from the side wall of the gas storage tank. This ensures timely removal of moisture and oil contaminants. The condensation of salt water avoids rust, pitting, and wall thinning caused by electrochemical corrosion at the source, ensuring the structural safety and operational stability of the tank, extending the service life of the equipment, and enabling real-time monitoring of inner wall wear, coating damage, and weld defects. This allows for early detection, early warning, and early handling of corrosion and mechanical damage, preventing minor issues from escalating into major safety accidents such as tank rupture and explosion. It also reduces downtime losses due to equipment failure, lowers maintenance costs and emergency response risks, and balances the efficiency, safety, and economy of pneumatic dewatering operations, providing dual protection for the continuous and stable construction of building foundation projects.

[0026] The drying assembly 27 includes a telescopic pipe 271 connected to the air inlet of the air compressor 4. The lower end of the telescopic pipe 271 is fixedly connected to a connecting cover 272. The outer wall of the connecting cover 272 is threadedly connected to a drying cylinder 28. The drying cylinder 28 is filled with a desiccant 29. A gravity sensor 30 is fixedly connected to the lower side wall of the support frame 3. The detection end of the gravity sensor 30 is connected to the connecting cover 272 through a hook mechanism.

[0027] A baffle 31 is fixedly connected to the inner wall of the top cover 9. A round hole matching the bent rod 14 is opened on the side wall of the baffle 31, and a scraper ring 32 is fixedly connected to the inner wall of the round hole. The bent rod 14 passes through the scraper ring 32.

[0028] Multiple indicator lights 33 are vertically distributed on the outer wall of the cylinder 131. A metal plate 34 is fixedly connected to the wall of the bent rod 14. The metal plate 34 is electrically connected to an external power source. Multiple metal blocks 35 corresponding to the indicator lights 33 are fixedly connected to the inner wall of the cylinder 131. The metal blocks 35 are electrically connected to the corresponding indicator lights 33 through the controller 2.

[0029] The side wall of the water collection cover 21 is connected to a drain pipe 36, and the end of the drain pipe 36 is threadedly connected to a cap 37.

[0030] The operating principle of this invention is explained as follows: Air is compressed in the air storage tank 1 of the air compressor 4 to maintain the internal air pressure of the air storage tank 1 at a set threshold. The compressed air is transmitted to the pneumatic reciprocating drainage pump 7 located at the bottom of the well 5 by the controller 2. Water is discharged from the well 5 using pneumatic technology to achieve automatic and intelligent pneumatic dewatering. When the pneumatic reciprocating drainage pump 7 is placed in the water, the one-way valve of the pneumatic reciprocating drainage pump 7 opens, and water flows into the pneumatic reciprocating drainage pump 7. The air storage tank 1 supplies air to the water pump through the air supply pipe 6. The water inlet one-way valve is closed under pressure, and the water outlet one-way valve is opened, and water flows into the water outlet pipe under pressure. After the water in the pneumatic reciprocating drainage pump 7 is discharged, the controller 2 controls the water outlet one-way valve to close, the gas in the pneumatic reciprocating drainage pump 7 is discharged, the water inlet one-way valve opens, and water flows into the pneumatic reciprocating drainage pump 7. This cycle continues. After the gas tank 1 has been used for a long time, the controller 2 will control the linear screw module 132 to work. The linear screw module 132 drives the reduction motor 15 and the scraper ring 18 to move downward together through the bent rod 14. The scraper ring 18 will move downward along the inner wall of the gas tank 1 to scrape off the condensate on the inner wall of the gas tank 1. While the scraper ring 18 moves downward slowly, the controller 2 will also control the servo motor 24 and the small electric push rod 25 to work. The small electric push rod 25 will drive the detection probe 26 to contact the inner wall of the gas tank 1, and the servo motor 24 will control the detection probe to rotate along the inner wall of the gas tank 1, so as to detect the wear degree of the inner wall of the gas tank 1. When the detection probe 26 moves to the inlet of the gas pipe 6 and the outlet of the air compressor 4, the controller 2 will control the small electric push rod 25 to drive the detection probe to retract, so as to avoid misjudgment. After the scraper ring 18 scrapes the condensate to the bottom, the controller 2 will control the drive motor 22 to work. The drive motor 22 controls the rotating drum 19 to rotate through the gear ring transmission assembly. The rotating drum 19 drives the scraper 20 to rotate through the bracket. The scraper 20 scrapes the inclined side wall at the bottom of the gas storage tank 1. The scraped condensate is discharged into the water collection cover 21 through the water inlet hole on the side wall of the rotating drum 19. The collected condensate can be discharged by opening the cap 37.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-electrified pneumatic dewatering device for building foundations, comprising a gas storage tank (1), a controller (2) connected to the side wall of the gas storage tank (1), a support frame (3) connected to the side wall of the gas storage tank (1), an air compressor (4) connected to the upper side wall of the support frame (3), and the air outlet of the air compressor (4) communicating with the gas storage tank (1), characterized in that, Also includes: A well (5) is located on one side of the gas storage tank (1). The side wall of the gas storage tank (1) near the well (5) is connected to a gas transmission pipe (6). The end of the gas transmission pipe (6) away from the gas storage tank (1) is located inside the well (5) and is connected to a pneumatic reciprocating drainage pump (7). The outlet end of the pneumatic reciprocating drainage pump (7) is connected to a drainage pipe (8). A connecting component (10) is used to connect the top cover (9) to the upper port of the gas storage tank (1), and a cleaning component (13) is connected to the side wall of the top cover (9). A drying assembly (27) is provided at the air inlet of the air compressor (4) for drying the gas.

2. The non-electrified pneumatic dewatering device for building foundations according to claim 1, characterized in that, The connecting assembly (10) includes a connecting ring (101) fixedly sleeved on the outer wall of the gas storage tank (1) and the top cover (9). The side wall of the connecting ring (101) is sleeved with a plurality of limiting frames (102). The side wall of the limiting frame (102) is provided with a limiting hole, and a limiting pin (11) is inserted into the limiting hole. The side walls of the two connecting rings (101) are provided with vertical holes that match the limiting pins (11). The upper end of the limiting pin (11) is fixedly connected to a pull plate (12). The pull plate (12) and the limiting frame (102) are fixedly connected with the same spring.

3. The non-electrified pneumatic dewatering device for building foundations according to claim 1, characterized in that, The cleaning assembly (13) includes a cylinder (131) fixedly connected to the upper side wall of the cover (9). A linear screw module (132) is fixedly connected to the inner wall of the cylinder (131). A bent rod (14) is fixedly connected to the moving end of the linear screw module (132). The bent rod (14) has an inverted L-shaped structure. A geared motor (15) is connected to the lower end of the bent rod (14) through a bracket. A rotating seat (16) is fixedly connected to the output end of the geared motor (15). Multiple crossbars (17) are fixedly connected to the outer wall of the rotating seat (16). The ends of the multiple crossbars (17) away from the rotating seat (16) are fixed. The gas storage tank (1) is connected to the same scraper ring (18). The lower end of the gas storage tank (1) is rotatably connected to a rotating drum (19) through a sealed bearing. The lower end of the rotating drum (19) is an open structure. The upper end of the rotating drum (19) is connected to a scraper (20) through a bracket. A water collection cover (21) is fixedly connected to the lower side wall of the gas storage tank (1). A drive motor (22) is connected to the side wall of the water collection cover (21) through a bracket. The drive motor (22) is connected to the rotating drum (19) through a gear ring transmission assembly. Multiple water inlets are opened on the side wall of the rotating drum (19). A detection component (23) is provided inside the scraper ring (18).

4. The non-electrified pneumatic dewatering device for building foundations according to claim 3, characterized in that, The detection component (23) includes an annular groove (231) formed on the outer wall of the scraper ring (18). The groove wall of the annular groove (231) is rotatably connected to a rotating ring (232) via a bearing. A servo motor (24) is connected to the side wall of the rotating ring (232). The output end of the servo motor (24) is connected to the annular groove (231) via a gear ring transmission assembly. A small electric push rod (25) is connected to the side wall of the rotating ring (232). A detection probe (26) is connected to the output end of the small electric push rod (25). The detection probe (26) is electrically connected to the controller (2).

5. The non-electrified pneumatic dewatering device for building foundations according to claim 1, characterized in that, The drying assembly (27) includes a telescopic pipe (271) connected to the air inlet of the air compressor (4). The lower end of the telescopic pipe (271) is fixedly connected to a connecting cover (272). The outer wall of the connecting cover (272) is threadedly connected to a drying cylinder (28). The drying cylinder (28) is filled with a desiccant (29). The lower side wall of the support frame (3) is fixedly connected to a gravity sensor (30). The detection end of the gravity sensor (30) is connected to the connecting cover (272) through a hook mechanism.

6. The non-electrified pneumatic dewatering device for building foundations according to claim 1, characterized in that, The inner wall of the cover (9) is fixedly connected to a baffle (31). The side wall of the baffle (31) is provided with a round hole that matches the bent rod (14), and the inner wall of the round hole is fixedly connected to a scraper ring (32). The bent rod (14) passes through the scraper ring (32).

7. A pneumatic dewatering device for building foundations without electricity according to claim 3, characterized in that, The outer wall of the cylinder (131) is vertically distributed with multiple indicator lights (33). The wall of the bent rod (14) is fixedly connected with a metal plate (34). The metal plate (34) is electrically connected to an external power source. The inner wall of the cylinder (131) is fixedly connected with multiple metal blocks (35) corresponding to the indicator lights (33). The metal blocks (35) are electrically connected to the corresponding indicator lights (33) through the controller (2).

8. A non-electrified pneumatic dewatering device for building foundations according to claim 3, characterized in that, The side wall of the water collection cover (21) is connected to a drain pipe (36), and the end of the drain pipe (36) is threaded with a cap (37).

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