Building foundation pit drainage device

Abstract

The utility model provides a building foundation pit drainage device, and belongs to the technical field of building construction. The building foundation pit drainage device comprises a floating platform and a soft water pumping pipe, a lifting mechanism is arranged on the floating platform, the water pumping pipe is installed on the lifting mechanism, a sewage pump is arranged at the upper end of the water pumping pipe, and an outlet of the sewage pump is communicated with a sand filtering piece. The device has the following effects that according to the height of the water level in the foundation pit, the distance between the water pumping pipe and the water surface is adjusted through the lifting mechanism, water can still be pumped at the low water level, pumping of sediment at the water bottom is reduced, and a mixture of the sediment and the water is pumped into the sediment filtering piece on the ground to be filtered and separated.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and more specifically, to a drainage device for building foundation pits. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plan dimensions. During the excavation of an excavation pit in a construction project, if the groundwater level is high and the base surface is below the groundwater level, dewatering is necessary to ensure subsequent construction.

[0003] In response, Chinese patent application number CN202323310073.4 discloses a drainage device for building foundation pits. This solution mainly utilizes the cutter and deflector plates in the crushing assembly fixed to one end of the shaft and the auger blades on the side surface of the propeller and shaft inside the suction tank. During the drainage process, it can first remove sand and gravel impurities in the foundation pit and crush any remaining sand and gravel, thereby reducing the chance of the drainage device being blocked. Secondly, it can discharge the silt and impurities sucked into the pipe again, thus avoiding blockage of the drainage device, reducing the trouble for workers, and improving the efficiency of foundation pit drainage.

[0004] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this utility model discovered that the above-mentioned technology has at least the following technical problems:

[0005] The sewage pump and suction tank are located below the float and need to be hoisted into the pit. When the water level in the pit is low, the suction tank and crushing components cannot be submerged, so the effect of blocking mud and sand is poor and it is not easy to pump out all the water in the pit. Utility Model Content

[0006] To overcome the above deficiencies, this application provides a building foundation pit drainage device, which aims to improve the problems mentioned in the background art.

[0007] This application provides a drainage device for a building foundation pit, including a floating platform and a flexible pumping pipe. The floating platform is equipped with a lifting mechanism, the pumping pipe is installed on the lifting mechanism, and a sewage pump is installed at the upper end of the pumping pipe. The outlet of the sewage pump is connected to a sand filter.

[0008] In one specific implementation, the floating platform includes a tube base and floats, with the float array circumferentially surrounding the tube base.

[0009] In the above process, the float is used to keep the pipe seat above the water surface, which helps to cope with low water levels.

[0010] In one specific implementation, the floating platform further includes a support rod, one end of which is hinged to the tube seat, and the other end of which is fixedly connected to the buoy.

[0011] In the above implementation process, the support rod adopts an interlocking method, which can be used to fold up the float when storing it, which helps to reduce space occupation. When in use, the support rod is flipped outward and locked in place by a buckle to form a tripod support method.

[0012] In one specific implementation, the lifting mechanism includes a sleeve that is axially slidably connected to the pipe seat and fixedly connected to the outer wall of the pumping pipe.

[0013] In one specific implementation, the lifting mechanism includes a worm gear, a worm, and a motor. The worm gear and the worm are both rotatably connected to the tube seat. The worm gear is threadedly connected to the tube sleeve. The worm meshes with the worm gear. The motor is mounted on the tube seat, and the output end of the motor is fixedly connected to the worm.

[0014] In the above process, the motor drives the worm to rotate, which in turn drives the worm wheel to rotate. Since the tube sleeve has an axial groove that engages with the tube seat, the tube sleeve can only move axially. Therefore, when the worm wheel rotates, it can drive the tube sleeve to move axially through the thread engagement, thereby adjusting the vertical height of the lower opening of the pumping pipe from the water surface.

[0015] In one specific implementation, the sand filter includes a sedimentation tank, an array of grids inside the sedimentation tank, and a water outlet at the rear end of the sedimentation tank.

[0016] In the above process, the sewage pump in the pit draws water into the sedimentation tank. The water flows from the top of the screen to the outlet at the rear end, while the silt sinks to the bottom of the sedimentation tank due to its own weight and is blocked by the screen, thus achieving the separation of silt and water.

[0017] In one specific implementation, a drain outlet is provided at one end of the sedimentation tank.

[0018] During the above process, after a large amount of sediment has settled, it can be discharged through the sewage outlet.

[0019] In one specific implementation, the bottom wall of the sedimentation tank is inclined, and all the grids have through holes at their bottom ends.

[0020] In the above process, the inclined bottom wall helps the silt to accumulate at the sewage outlet, and the through holes at the bottom of the screen facilitate the silt to pass through the screen and collect near the sewage outlet. Combined with flushing, the silt in the sedimentation tank can be easily flushed away.

[0021] Compared with the prior art, the beneficial effects of this application are: according to the water level in the pit, the distance between the pumping pipe and the water surface is adjusted by the lifting mechanism, so that water can still be pumped when the water level is low and the extraction of mud and sand at the bottom of the water is reduced. The mixture of mud and sand and water is pumped to the sand filter on the ground for filtration and separation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a building foundation pit drainage device provided in the embodiments of this application;

[0024] Figure 2 A schematic diagram illustrating the connection relationship between the floating platform and the pumping pipe provided for an embodiment of this application;

[0025] Figure 3 A schematic diagram illustrating the connection relationship between the tube seat and the lifting mechanism provided in this embodiment of the application;

[0026] Figure 4 A schematic diagram of the filter element structure provided for an embodiment of this application.

[0027] In the diagram: 10-Floating platform; 11-Pipe seat; 12-Float; 13-Support rod; 20-Water pumping pipe; 30-Lifting mechanism; 31-Pipe sleeve; 32-Worm gear; 33-Worm; 34-Motor; 40-Sewage pump; 50-Filter sand component; 51-Sedimentation tank; 52-Grate; 53-Outlet; 54-Sewage outlet; 55-Through hole. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] Please see Figures 1-4 This application provides a drainage device for a building foundation pit, including a floating platform 10 and a flexible pumping pipe 20. A lifting mechanism 30 is installed on the floating platform 10, and the pumping pipe 20 is mounted on the lifting mechanism 30. A sewage pump 40 is installed at the upper end of the pumping pipe 20, and the outlet of the sewage pump 40 is connected to a sand filter element 50. The distance between the pumping pipe 20 and the water surface is adjusted by the lifting mechanism 30 according to the water level in the foundation pit. Even at low water levels, water can still be pumped while reducing the extraction of sediment from the bottom of the pit. The mixture of sediment and water is then pumped to the sand filter element 50 on the ground for filtration and separation.

[0030] Please see Figures 1-4 The floating platform 10 includes a tube base 11 and floats 12, with the floats 12 arranged in an array around the tube base 11. The floats 12 are used to keep the tube base 11 above the water surface, which helps to cope with low water levels.

[0031] Please see Figures 1-4 The floating platform 10 also includes a support rod 13, one end of which is hinged to the tube base 11, and the other end of which is fixedly connected to the float 12. The support rod 13 is connected in an interlocking manner, which allows the float 12 to be folded up when stored, thus reducing space occupation. When in use, the support rod 13 is flipped outward and locked in place by a buckle, forming a tripod support.

[0032] Please see Figures 1-4 The lifting mechanism 30 includes a sleeve 31, which is axially slidably connected to the pipe seat 11 and fixedly connected to the outer wall of the pumping pipe 20. The lifting mechanism 30 includes a worm gear 32, a worm 33, and a motor 34. Both the worm gear 32 and the worm 33 are rotatably connected to the pipe seat 11. The worm gear 32 is threadedly connected to the sleeve 31, and the worm 33 meshes with the worm gear 32. The motor 34 is mounted on the pipe seat 11, and its output end is fixedly connected to the worm 33. The motor 34 drives the worm 33 to rotate, which in turn drives the worm gear 32 to rotate. Because the sleeve 31 has an axial groove that engages with the pipe seat 11, the sleeve 31 can only move axially. Therefore, when the worm gear 32 rotates, it can drive the sleeve 31 to move axially through the threaded engagement, thereby adjusting the vertical height of the lower opening of the pumping pipe 20 relative to the water surface.

[0033] Please see Figures 1-4 The sand filter element 50 includes a sedimentation tank 51, with a grid 52 arrayed inside the sedimentation tank 51, and a water outlet 53 located at the rear end of the sedimentation tank 51. The sewage pump 40 in the pit draws water into the sedimentation tank 51, and the water flows from the top of the grid 52 to the water outlet 53 at the rear end, while the silt sinks to the bottom of the sedimentation tank 51 due to its own weight and is blocked by the grid 52, thus achieving the separation of silt and water.

[0034] Please see Figures 1-4 A drain outlet 54 is provided at one end of the sedimentation tank 51. After a large amount of sediment has settled, it can be discharged through the drain outlet 54.

[0035] Please see Figures 1-4 The bottom wall of the sedimentation tank 51 is inclined, and all the grids 52 have through holes 55 at their bottom ends. The inclined bottom wall helps the sediment to accumulate at the discharge outlet 54. The through holes 55 at the bottom of the grids 52 make it easy for the sediment to pass through the grids 52 and collect near the discharge outlet 54. Combined with flushing, the sediment in the sedimentation tank 51 can be easily flushed away.

[0036] The working principle of this foundation pit drainage device is as follows: Support rod 13 is flipped outwards and secured with a snap-fit ​​mechanism, forming a tripod support. Float 12 floats pipe seat 11 and lifting mechanism 30 on the water surface. Motor 34 drives worm gear 33 to rotate, which in turn drives worm wheel 32 to rotate. Because the pipe sleeve 31 has an axial groove that engages with pipe seat 11, the pipe sleeve 31 can only move axially. Therefore, when the worm wheel 32 rotates, it drives the pipe sleeve 31 to move axially through a threaded engagement. This allows for adjustment of the vertical distance between the lower opening of the pumping pipe 20 and the water surface according to the water depth. When the water in the foundation pit is deep, the pumping pipe 20 can be submerged below the water surface, facilitating large-scale water pumping and minimizing the risk of pumping out silt. When the water level is low, the pumping pipe can be... While the inlet of pump 20 is submerged underwater, it is brought as close to the water surface as possible. Then, water is pumped slowly to reduce the amount of silt pumped in. The sewage pump 40, which contains silt, is pumped into the sedimentation tank 51. The water flows from the top of the screen 52 to the outlet 53 at the rear end. The silt, due to its own weight, sinks to the bottom of the sedimentation tank 51 and is blocked by the screen 52, thus separating the silt from the water. After a large amount of silt has settled, it can be discharged through the sewage outlet 54, thus separating the silt from the water. In summary, according to the water level in the pit, the distance between the pumping pipe 20 and the water surface is adjusted by the lifting mechanism 30. Water can still be pumped in at low water levels, and the extraction of silt from the bottom of the water is reduced. The mixture of silt and water is then pumped to the sand filter 50 on the ground for filtration and separation.

[0037] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A drainage device for building foundation pits, characterized in that, It includes a floating platform (10) and a flexible water pumping pipe (20). The floating platform (10) is equipped with a lifting mechanism (30). The water pumping pipe (20) is installed on the lifting mechanism (30). A sewage pump (40) is installed at the upper end of the water pumping pipe (20). The outlet of the sewage pump (40) is connected to a sand filter element (50).

2. The building foundation pit drainage device according to claim 1, characterized in that, The floating platform (10) includes a tube seat (11) and floats (12), with the floats (12) arranged around the tube seat (11).

3. A building foundation pit drainage device according to claim 2, characterized in that, The floating platform (10) also includes a support rod (13), one end of which is hinged to the tube seat (11), and the other end of which is fixedly connected to the float (12).

4. A building foundation pit drainage device according to claim 3, characterized in that, The lifting mechanism (30) includes a sleeve (31), which is axially slidably connected to the pipe seat (11) and fixedly connected to the outer wall of the pumping pipe (20).

5. A building foundation pit drainage device according to claim 4, characterized in that, The lifting mechanism (30) includes a worm gear (32), a worm (33) and a motor (34). The worm gear (32) and the worm (33) are rotatably connected to the tube seat (11). The worm gear (32) is threadedly connected to the tube sleeve (31). The worm (33) meshes with the worm gear (32). The motor (34) is mounted on the tube seat (11). The output end of the motor (34) is fixedly connected to the worm (33).

6. A building foundation pit drainage device according to claim 5, characterized in that, The sand filter element (50) includes a sedimentation tank (51), in which a grid (52) is arranged, and a water outlet (53) is provided at the rear end of the sedimentation tank (51).

7. A building foundation pit drainage device according to claim 6, characterized in that, A drain outlet (54) is provided at one end of the sedimentation tank (51).

8. A building foundation pit drainage device according to claim 7, characterized in that, The bottom wall of the sedimentation tank (51) is inclined, and all the grids (52) have through holes (55) at their bottom ends.

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