An anti-ponding device for foundation drainage construction of building construction

Through the double-layer filter structure and automatic cleaning system, the problem of sludge garbage entering the water storage device in the existing technology is solved, automatic filter cleaning is realized, and the efficiency and safety of drainage construction of the building foundation is improved.

CN116356861BActive Publication Date: 2025-07-11CHINA METALLURGICAL ROAD & BRIDGE CONSTR CO LTD
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Patent Information

Application Number
CN202310497955.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-27
Publication Date
2025-07-11
Estimated Expiration
2043-04-27

AI Technical Summary

Technical Problem

When the existing building foundation drainage construction equipment is cleaned by the filter, silt and garbage are prone to enter the water storage device, resulting in the accumulation of the device and reducing work efficiency.

Method used

The double-layer filter mesh structure is adopted, and an automatic cleaning system driven by hydraulic rods and motors is used to realize automatic replacement and cleaning of the filter mesh to prevent silt and garbage from entering the water storage device.

Benefits of technology

Automatic cleaning of the filter is achieved, work efficiency is improved, manual intervention is reduced, and the equipment is safe and efficient.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a water accumulation prevention device for building foundation drainage construction, specifically related to the construction field. A filtering device and a water storage device are embedded at the bottom of the foundation pit. The water storage device is located below the filtering device. The filtering device includes a filtering pipe, a first filter screen, and a second filter screen. Rotating grooves are provided on both the front surface and the rear surface of the filtering pipe. A rotating rod is rotatably connected inside the rotating groove. The first filter screen is fixedly connected to the outer side wall of the rotating rod. A first gear is fixedly connected to the outer side wall of the rotating rod. In the present invention, the first filter screen and the second filter screen are used for auxiliary replacement. When the second filter screen is cleaned, the first filter screen automatically unfolds for filtering work, preventing impurities from flowing into the water storage tank and accumulating during cleaning, thereby affecting the later work efficiency. Moreover, it realizes automatic change without manual supervision and control, increasing the work efficiency.
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Description

Technical Field

[0001] The present invention relates to the field of surveying and mapping, and more specifically, to a water accumulation prevention device for foundation drainage construction of building construction. Background Art

[0002] The building foundation refers to the enlarged part of the wall or column of a house buried underground based on the foundation. During the construction of the building foundation, it is often necessary to excavate a building foundation pit in the space below the ground to improve the stability of the building construction. However, due to groundwater or rainfall, it is easy for water to seep into the foundation pit from the soil. If the water in the foundation pit is not drained out of the foundation pit in time, it will eventually cause the soil on the inner side of the foundation pit to collapse, thereby affecting the construction progress and quality;

[0003] After retrieval, the existing patent (Publication No.: CN112523237B) discloses a building foundation drainage construction device and its construction method, which includes a collection box and a water storage tank for embedding at the bottom of the foundation pit. The water storage tank is arranged on one side of the collection box. The collection box is connected to the water storage tank through a connecting pipe, and the connecting pipe is respectively connected to the collection box and the water storage tank through a connecting component. A pumping component is arranged in the water storage tank for sucking the muddy water in the water storage tank outside the water storage tank. The top of the collection box is open, and a filter screen for filtering garbage such as silt in the muddy water is arranged in the collection box, and a fixing component for fixing the filter screen is arranged in the collection box. This application has the effect of facilitating the cleaning of garbage such as silt in the muddy water. The inventor found the following problems in the process of implementing the present invention:

[0004] The existing building foundation drainage construction devices all have filtering and water storage devices inside the foundation pit, and then the water in the water storage device is drained to the outside through the pumping component. However, for the silt and garbage blocked by the filter screen during filtering, it needs to be manually taken out for cleaning. When cleaning the filter screen, the filtering device cannot block and filter the internal water, and a part of silt and garbage will still enter the water storage device. In the long run, it will cause accumulation in the water storage device and reduce the working efficiency;

[0005] Therefore, a water accumulation prevention device for foundation drainage construction of building construction is proposed to solve the above problems. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a water accumulation prevention device for foundation drainage construction of building construction to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: a water accumulation prevention device for building foundation drainage construction, including a foundation pit, a filtering device and a water storage device are embedded at the bottom of the foundation pit, the water storage device is located below the filtering device, the filtering device includes a filtering pipe, a first filter screen, and a second filter screen. Rotating grooves are provided on both the front surface and the rear surface of the filtering pipe, a rotating rod is rotatably connected inside the rotating groove, the first filter screen is fixedly connected to the outer side wall of the rotating rod, a first gear is fixedly connected to the outer side wall of the rotating rod, a through-type cleaning hole is provided on the right side of the filtering pipe, rubber strips are integrally formed on both the front surface and the rear surface of the second filter screen, two groups of connecting plates are rotatably connected to the opposite sides of the rubber strips, the connecting plates are located inside the cleaning hole, a universal ball is rotatably connected to the right side of the connecting plate on the right side, a gravity cylinder is fixedly connected to the lower surface of the filtering pipe, a hydraulic rod is slidably connected inside the gravity cylinder, a first spring is fixedly connected between the hydraulic rod and the gravity cylinder, the bottom end of the hydraulic rod is rotatably connected to the universal ball, sliding grooves are provided on both the rear surface and the front surface of the filtering pipe, the left end of the connecting plate on the left side is rotatably connected to a limiting rod through a collar, limiting grooves are provided at both ends of the limiting rod, a second spring is fixedly connected inside the limiting groove, the top end of the second spring is fixedly connected to a limiting block, and the limiting block is adapted to the limiting groove.

[0008] Preferably, linkage grooves are symmetrically provided inside the filtering pipe, the linkage grooves are communicated with the rotating grooves and the sliding grooves, a linkage rack is provided inside the linkage grooves, the linkage rack is meshed with the first gear, a third spring is fixedly connected inside the linkage grooves, and the third spring is fixedly connected to the linkage rack.

[0009] Preferably, two groups of fitting blocks are fixedly connected to the right side of the filtering pipe at the position of the sliding groove, limiting cylinders are embedded on the opposite sides of the fitting blocks, a fourth spring is fixedly connected inside the limiting cylinders, an adsorption block is fixedly connected to the top end of the fourth spring, the limiting block is made of a magnet material, the limiting block is adapted to the adsorption block, and the sliding grooves are provided on the opposite sides of the fitting blocks.

[0010] Preferably, a placement groove is provided on the left side inside the filtering pipe, the limiting cylinder is located inside the placement groove, an upper and lower plate is fixedly connected inside the placement groove, a fifth spring is fixedly connected to the surface of the upper and lower plate, a first motor is fixedly connected to the top end of the fifth spring, a winding drum is fixedly connected to the output shaft of the first motor, a pulling rope is wound around the outer side wall of the winding drum, and the other end of the pulling rope is fixedly connected to the limiting cylinder.

[0011] Preferably, the water storage device includes a water storage tank and a sludge tank. The water storage tank corresponds to the filter pipe, and the sludge tank corresponds to the hydraulic rod. The top of the sludge tank is fixedly connected with a U-shaped member, and a second motor is fixedly connected inside the U-shaped member. The output shaft of the second motor is fixedly connected with a shaft rod, and a scraper is fixedly connected to the outer side wall of the shaft rod. The scraper is adapted to the second filter screen.

[0012] Preferably, an alarm is fixedly connected inside the gravity cylinder, and a PLC control board is fixedly connected to the lower surface of the filter pipe. The PLC control board is in signal connection with the alarm, the first motor, and the second motor.

[0013] Preferably, a water extraction pipe is fixedly connected to the outside of the foundation pit, and the water extraction pipe is communicated with the water storage tank.

[0014] Preferably, a silt pipe is fixedly connected to the outside of the foundation pit, and the silt pipe is communicated with the sludge tank.

[0015] Preferably, the second filter screen is made of nylon material.

[0016] Preferably, the pulling force of the first spring is greater than the pulling force of the third spring.

[0017] The technical effects and advantages of the present invention:

[0018] Compared with the prior art, the present invention uses the first filter screen and the second filter screen for auxiliary replacement. When cleaning the second filter screen, the first filter screen automatically unfolds to perform the filtering work, preventing impurities from flowing into the water storage tank and accumulating during cleaning, thereby affecting the later work efficiency. Moreover, it realizes automatic change without manual supervision and control, increasing the work efficiency.

[0019] Compared with the prior art, after the filter screen is cleaned, it is reset by the hydraulic rod and the first motor pull rope, avoiding manual installation and replacement of the filter screen, thereby ensuring the safety of the foundation pit and saving labor.

[0020] Compared with the prior art, the first motor, the second motor, and the alarm are operated through the PLC control board. When triggered, the second motor drives the scraper to rotate, thereby ensuring contact with the surface of the second filter screen for scraping. When not triggered, it is reset to avoid equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0023] Figure 3In the present invention Figure 2 is a schematic enlarged view of part A in the present invention.

[0024] Figure 4 In the present invention Figure 2 is a schematic enlarged view of part B in the present invention.

[0025] Figure 5 In the present invention Figure 2 is a schematic enlarged view of part C in the present invention.

[0026] Figure 6 is a schematic top view of the first filter screen of the filter tube in the present invention.

[0027] Figure 7 is a schematic top view of the second filter screen of the filter tube in the present invention.

[0028] Figure 8 is a schematic view of the structure after the second filter screen of the present invention is moved.

[0029] Figure 9 is a schematic side view of the U-shaped part of the present invention.

[0030] Reference numerals are: 1, foundation pit; 2, filtering device; 3, water storage device; 4, filter tube; 5, first filter screen; 6, second filter screen; 7, rotating groove; 8, rotating rod; 9, first gear; 10, cleaning hole; 11, rubber strip; 12, connecting plate; 13, universal ball; 14, gravity cylinder; 15, hydraulic rod; 16, first spring; 17, sliding groove; 18, collar; 19, limiting rod; 20, limiting groove; 21, second spring; 22, limiting block; 23, linkage groove; 24, linkage rack; 25, third spring; 26, limiting cylinder; 27, adsorption block; 28, placement groove; 29, upper and lower plates; 30, fifth spring; 31, first motor; 32, winding drum; 33, pulling rope; 34, water storage tank; 35, sludge tank; 36, U-shaped part; 37, second motor; 38, shaft rod; 39, scraper; 40, alarm; 41, PLC control board; 42, water suction pipe; 43, silt pipe; 44, fitting block; 45, fourth spring. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] As shown in the attached Figure 1 andFigure 2 A water accumulation prevention device for building foundation drainage construction as shown, including a foundation pit 1. A filtering device 2 and a water storage device 3 are embedded at the bottom of the foundation pit 1. The water storage device 3 is located below the filtering device 2. The filtering device 2 includes a filter pipe 4, a first filter screen 5, and a second filter screen 6. Rotating grooves 7 are provided on both the front surface and the rear surface of the filter pipe 4. A rotating rod 8 is rotatably connected inside the rotating groove 7. A first filter screen 5 is fixedly connected to the outer side wall of the rotating rod 8. A first gear 9 is fixedly connected to the outer side wall of the rotating rod 8. A through-type cleaning hole 10 is provided on the right side of the filter pipe 4. Rubber strips 11 are integrally formed on both the front surface and the rear surface of the second filter screen 6. Two groups of connecting plates 12 are rotatably connected to the opposite sides of the rubber strips 11. The connecting plates 12 are located inside the cleaning hole 10. A universal ball 13 is rotatably connected to the right side of the connecting plate 12 on the right side. A gravity cylinder 14 is fixedly connected to the lower surface of the filter pipe 4. A hydraulic rod 15 is slidably connected inside the gravity cylinder 14. A first spring 16 is fixedly connected between the hydraulic rod 15 and the gravity cylinder 14. The bottom end of the hydraulic rod 15 is rotatably connected to the universal ball 13. Slide grooves 17 are provided on both the rear surface and the front surface of the filter pipe 4. The left end of the connecting plate 12 on the left side is rotatably connected to a limiting rod 19 through a collar 18. Limiting grooves 20 are provided at both ends of the limiting rod 19. A second spring 21 is fixedly connected inside the limiting groove 20. A limiting block 22 is fixedly connected to the top end of the second spring 21. The limiting block 22 is adapted to the limiting groove 20.

[0034] Among them: When sewage flows into the filter pipe 4, the second filter screen 6 filters and blocks sludge impurities. When the second filter screen 6 blocks impurities of a certain weight, it will drop to the slide groove 17, and drive the hydraulic rod 15 to pull the first spring 16. Then, at this time, the hydraulic rod 15 can be started. Since the hydraulic rod 15 is rotatably connected to the universal ball 13, the rubber strip 11 and the connecting plate 12 are moved downward. Due to the softness of the rubber strip 11, the impurities on the second filter screen 6 fall into the water storage device 3. After cleaning, the hydraulic rod 15 retracts, and then the second filter screen 6 blocks again.

[0035] Embodiment Two

[0036] Based on Embodiment One, the solution in Embodiment One is further refined and introduced in combination with the following specific working methods. For details, see the following description:

[0037] Such as Figure 2 and Figure 3As shown, as a preferred embodiment; interlocking grooves 23 are symmetrically arranged inside the filter pipe 4. The interlocking grooves 23 communicate with the rotating grooves 7 and the sliding grooves 17. An interlocking rack 24 is arranged inside the interlocking grooves 23. The interlocking rack 24 is meshed and connected with the first gear 9. A third spring 25 is fixedly connected inside the interlocking grooves 23. The third spring 25 is fixedly connected with the interlocking rack 24. When the second filter screen 6 descends, the third spring 25 pushes the interlocking rack 24 downward, thereby enabling the interlocking rack 24 to be meshed and connected with the first gear 9, and closing and blocking the first filter screen 5 to prevent sludge from falling into the water storage tank 34 when cleaning the second filter screen 6.

[0038] As Figure 7 shown, as a preferred embodiment; two sets of fitting blocks 44 are fixedly connected to the right side of the filter pipe 4 at the position of the sliding groove 17. Limiting cylinders 26 are embedded on the opposite sides of the fitting blocks 44. A fourth spring 45 is fixedly connected inside the limiting cylinders 26. An adsorption block 27 is fixedly connected to the top end of the fourth spring 45. The limiting block 22 is made of magnet material and is adapted to the adsorption block 27. A sliding groove 17 is formed on the opposite sides of the fitting blocks 44. When the hydraulic rod 15 pushes the universal ball 13 to the lowest position, the adsorption block 27 is magnetically fixed to the limiting block 22 to prevent the second filter screen 6 from falling off.

[0039] As Figure 4 shown, as a preferred embodiment; a placement groove 28 is formed on the left side inside the filter pipe 4. The limiting cylinder 26 is located inside the placement groove 28. An upper and lower plate 29 is fixedly connected inside the placement groove 28. A fifth spring 30 is fixedly connected to the surface of the upper and lower plate 29. A first motor 31 is fixedly connected to the top end of the fifth spring 30. A winding drum 32 is fixedly connected to the output shaft of the first motor 31. A pull rope 33 is wound around the outer side wall of the winding drum 32. The other end of the pull rope 33 is fixedly connected to the limiting cylinder 26. The first motor 31 relaxes the winding drum 32, and the pull rope 33 moves synchronously with the second filter screen 6. When it needs to be retracted, the first motor 31 winds the winding drum 32, thereby winding the pull rope 33 and resetting it in place.

[0040] As Figure 2 shown, as a preferred embodiment; the water storage device 3 includes a water storage tank 34 and a sludge tank 35. The water storage tank 34 corresponds to the filter pipe 4, and the sludge tank 35 corresponds to the hydraulic rod 15. A U-shaped member 36 is fixedly connected to the top end of the sludge tank 35. A second motor 37 is fixedly connected inside the U-shaped member 36. A shaft rod 38 is fixedly connected to the output shaft of the second motor 37. A scraping plate 39 is fixedly connected to the outer side wall of the shaft rod 38. The scraping plate 39 is adapted to the second filter screen 6. The second motor 37 drives the shaft rod 38 to rotate, thereby adjusting the angle of the scraping plate 39 to contact and clean the second filter screen 6.

[0041] As Figure 1As shown, as a preferred embodiment, an alarm 40 is fixedly connected inside the gravity cylinder 14, and a PLC control board 41 is fixedly connected to the lower surface of the filter pipe 4. The PLC control board 41 is in signal connection with the alarm 40, the first motor 31, and the second motor 37. The PLC control board 41 detects the alarm 40 and controls the first motor 31 and the second motor 37.

[0042] As Figure 1 shown, as a preferred embodiment, a water extraction pipe 42 is fixedly connected to the outside of the foundation pit 1. The water extraction pipe 42 is communicated with the water storage tank 34, and the water extraction pipe 42 discharges the muddy water in the water storage tank 34.

[0043] As Figure 1 shown, as a preferred embodiment, a silt pipe 43 is fixedly connected to the outside of the foundation pit 1. The silt pipe 43 is communicated with the sludge tank 35, and the silt pipe 43 removes the impurities in the sludge tank 35.

[0044] As Figure 1 shown, as a preferred embodiment, the second filter screen 6 is made of nylon material and has a large flexible strength.

[0045] As Figure 1 shown, as a preferred embodiment, the pulling force of the first spring 16 is greater than the pulling force of the third spring 25. During normal use, it prevents the third spring 25 from moving the second filter screen 6 downward by itself.

[0046] The working process of the present invention is as follows:

[0047] When the muddy water flows into the water storage tank 34 through the filter pipe 4, the second filter screen 6 blocks the impurities. As the continuous work progresses, the impurities on the surface of the second filter screen 6 become heavier, moving the second filter screen 6 downward. Thereby, the hydraulic rod 15 pulls the first spring 16 and triggers the alarm 40. At the same time, the third spring 25 moves the linkage rack 24 downward, causing the first filter screen 5 to unfold for auxiliary work. Further, the PLC controller 41 controls the first motor 31 and the second motor 37 to work. The first motor 31 releases the pulling rope 33, and the hydraulic rod 15 moves the rubber strip 11 and the connecting plate 12 downward. Due to the softness of the rubber strip 11, the impurities on the second filter screen 6 fall into the sludge tank 35, and the scraper 39 performs secondary cleaning on them. After completion, the first motor 31 winds up the pulling rope 33, and the hydraulic rod 15 resets, causing the second filter screen 6 to reset along the track of the sliding groove 17 again. Then, due to the pulling force of the first spring 16 being greater than that of the third spring 25, the second filter screen 6 rises, lifting the linkage rack 24, and the first filter screen 5 resets.

[0048] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and defined, the terms "installed", "connected", and "linked" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. The terms "up", "down", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0049] Second, in the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0050] Finally, the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An anti-ponding device for building foundation drainage construction, including a foundation pit (1), characterized in that: A filtering device (2) and a water storage device (3) are embedded at the bottom of the foundation pit (1). The water storage device (3) is located below the filtering device (2). The filtering device (2) includes a filter pipe (4), a first filter screen (5), and a second filter screen (6). Rotating grooves (7) are formed on both the front and rear surfaces of the filter pipe (4). A rotating rod (8) is rotatably connected inside the rotating groove (7). The first filter screen (5) is fixedly connected to the outer side wall of the rotating rod (8). A first gear (9) is fixedly connected to the outer side wall of the rotating rod (8). A through cleaning hole (10) is formed on the right side of the filter pipe (4). Rubber strips (11) are integrally formed on both the front and rear surfaces of the second filter screen (6). Two groups of connecting plates (12) are rotatably connected to the opposite sides of the rubber strips (11). The connecting plates (12) are located inside the cleaning hole (10). A universal ball (13) is rotatably connected to the right side of the connecting plate (12) on the right side. A gravity cylinder (14) is fixedly connected to the lower surface of the filter pipe (4). A hydraulic rod (15) is slidably connected inside the gravity cylinder (14). A first spring (16) is fixedly connected between the hydraulic rod (15) and the gravity cylinder (14). The bottom end of the hydraulic rod (15) is rotatably connected to the universal ball (13). Slide grooves (17) are formed on both the rear and front surfaces of the filter pipe (4). The left end of the connecting plate (12) on the left side is rotatably connected to a limiting rod (19) through a collar (18). Limiting grooves (20) are formed at both ends of the limiting rod (19). A second spring (21) is fixedly connected inside the limiting groove (20). A limiting block (22) is fixedly connected to the top end of the second spring (21). The limiting block (22) is adapted to the limiting groove (20). Linkage grooves (23) are symmetrically arranged inside the filter pipe (4). The linkage grooves (23) communicate with the rotating grooves (7) and the slide grooves (17). A linkage rack (24) is arranged inside the linkage groove (23). The linkage rack (24) is meshed with the first gear (9). A third spring (25) is fixedly connected inside the linkage groove (23). The third spring (25) is fixedly connected to the linkage rack (24). Two groups of fitting blocks (44) are fixedly connected to the right side of the filter pipe (4) at the position of the slide groove (17). Limiting cylinders (26) are embedded on the opposite sides of the fitting blocks (44). A fourth spring (45) is fixedly connected inside the limiting cylinder (26). An adsorption block (27) is fixedly connected to the top end of the fourth spring (45). The limiting block (22) is made of a magnet material and is adapted to the adsorption block (27). Slide grooves (17) are formed on the opposite sides of the fitting blocks (44).A placement groove (28) is formed on the left side inside the filter pipe (4). The limiting cylinder (26) is located inside the placement groove (28). An upper and lower plate (29) is fixedly connected inside the placement groove (28). A fifth spring (30) is fixedly connected to the surface of the upper and lower plate (29). The top end of the fifth spring (30) is fixedly connected to a first motor (31). The output shaft of the first motor (31) is fixedly connected to a winding drum (32). A pulling rope (33) is wound around the outer sidewall of the winding drum (32). The other end of the pulling rope (33) is fixedly connected to the limiting cylinder (26). The water storage device (3) includes a water storage tank (34) and a sludge tank (35). The water storage tank (34) corresponds to the filter pipe (4). The sludge tank (35) corresponds to the hydraulic rod (15). A U-shaped member (36) is fixedly connected to the top end of the sludge tank (35). A second motor (37) is fixedly connected inside the U-shaped member (36). The output shaft of the second motor (37) is fixedly connected to a shaft rod (38). A scraping plate (39) is fixedly connected to the outer sidewall of the shaft rod (38). The scraping plate (39) is adapted to the second filter screen (6).; 2. The anti-ponding device for building foundation drainage construction according to claim 1, characterized in that: An alarm (40) is fixedly connected inside the gravity cylinder (14), and a PLC control board (41) is fixedly connected to the lower surface of the filter pipe (4). The PLC control board (41) is in signal connection with the alarm (40), the first motor (31), and the second motor (37).

3. The anti-ponding device for building foundation drainage construction according to claim 1, wherein: A water extraction pipe (42) is fixedly connected to the outside of the foundation pit (1), and the water extraction pipe (42) communicates with the water storage tank (34).

4. The anti-ponding device for building foundation drainage construction according to claim 1, characterized in that: A silt pipe (43) is fixedly connected to the outside of the foundation pit (1), and the silt pipe (43) communicates with the sludge tank (35).

5. The anti-ponding device for building foundation drainage construction according to claim 1, characterized in that: The second filter screen (6) is made of nylon material.

6. The anti-ponding device for building foundation drainage construction according to claim 1, characterized in that: The pulling force of the first spring (16) is greater than the pulling force of the third spring (25).

Citation Information

Patent Citations

  • Building foundation drainage construction device and construction method

    CN112523237B

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    CN112523237A

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    CN115450228A

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    CN213433165U