A foundation pit drainage device for construction engineering construction

Abstract

This invention discloses a drainage device for foundation pits used in building construction, belonging to the field of foundation pit drainage technology. It includes a main pipe, a connecting bend, an insertion rod, and branch pipes. The main pipe is connected to the branch pipes via the connecting bend. A sealing pipe is connected to the upper end of each branch pipe, and a protective pipe is connected to the lower end. A sealing component is movably installed inside the sealing pipe, and a self-cleaning component is movably installed inside the branch pipe. The self-cleaning component is movably installed outside the protective pipe. Through this multi-layered sealing structure, the sealing performance of the connection points, the device, and the foundation is significantly improved, effectively preventing negative pressure leakage. Simultaneously, a pressure sensor within the sealed space can monitor pressure changes in real time, quickly locating the fault location in case of leakage, reducing troubleshooting and maintenance time, and ensuring drainage progress. The self-cleaning component can automatically unclog the filter holes on the inner and outer pipes. Furthermore, during installation, the outer pipe is stored in the placement cavity, preventing soil from directly clogging the filter holes when inserted into the ground.

Description

Technical Field

[0001] This invention belongs to the field of foundation pit drainage technology, and particularly relates to a drainage device for foundation pits used in building construction. Background Technology

[0002] Foundation pit dewatering refers to the dewatering work carried out when the groundwater level is higher than the excavation bottom during foundation pit excavation, causing groundwater to continuously seep into the pit. This is done to ensure that the foundation pit can be constructed under dry conditions and to prevent slope instability. When the groundwater depth does not exceed 6 meters, single-stage vacuum wellpoint dewatering is usually selected. The equipment involves sinking a small-diameter well pipe into the aquifer at the base of the foundation pit around the perimeter of the pit. The upper part of the well pipe is connected to a main pipe, through which pumping equipment continuously extracts groundwater from the well pipe, lowering the original groundwater level below the foundation.

[0003] However, existing wellpoint dewatering devices still have the following drawbacks in practical applications: A. Poor sealing reliability: The connection between the main pipe and branch pipes, and between the branch pipes and the foundation of traditional well point devices often adopts a single sealing structure. The sealing performance is easily affected by construction vibration and soil compression, resulting in negative pressure leakage and significantly reducing pumping efficiency. Moreover, it is difficult to quickly locate the leak point after leakage, and the investigation and maintenance are time-consuming, which seriously affects the drainage progress.

[0004] B. Filter holes are prone to clogging: The filter holes of the existing equipment are mostly directly exposed. During the process of inserting the branch pipe into the ground, soil can easily enter and clog the filter holes, resulting in poor water flow during subsequent pumping. At the same time, the lack of a self-cleaning function for the filter holes affects the continuity of construction.

[0005] C. Lack of monitoring of sealing status: Existing devices cannot monitor the sealing status of key connection parts in real time. When air leakage occurs, it can only be detected after the pumping efficiency drops significantly. By then, it has already caused safety hazards such as water accumulation in the foundation pit and soil softening, delaying the construction progress.

[0006] In view of the shortcomings of the existing technology, there is an urgent need for a wellpoint drainage device with efficient sealing, self-cleaning anti-clogging and sealing monitoring functions to improve the stability, safety and construction efficiency of foundation pit drainage. Summary of the Invention

[0007] In view of the above situation and to overcome the defects of the prior art, the present invention provides a drainage device for foundation pits in building construction, which at least partially solves the above-mentioned technical problems.

[0008] The technical solution adopted in this invention is as follows: A drainage device for foundation pits in building construction includes a main pipe, a connecting bend, a rod, and branch pipes. The main pipe is connected to the branch pipes through the connecting bend. A sealing pipe is connected to the upper end of the branch pipe, and a protective pipe is connected to the lower end of the branch pipe. A sealing component is movably installed inside the sealing pipe, and a self-cleaning component is movably installed inside the branch pipe. The outside of the self-cleaning component is movably installed inside the protective pipe. The sealing assembly contains multiple sets of fixing components, which are movably installed on the side wall of the sealing tube. The multiple sets of fixing components are evenly spaced along the circumference of the sealing tube. Each fixing component includes a limiting rod, an arc-shaped plate, and an outer sealing ring. The limiting rod is movably installed through the side wall of the sealing tube. The arc-shaped plate is located inside the sealing tube and is connected to one end of the limiting rod located inside the sealing tube. The outer sealing ring is installed on the outer bottom wall of the arc-shaped plate.

[0009] The sealing tube has a connecting ring installed on its inner wall, and a threaded hole is provided on the inner wall of the connecting ring to facilitate the installation of a connecting bend. An inner sealing ring is installed on the upper wall of the connecting ring. An arc-shaped plate is movably mounted on the upper wall of the inner sealing ring. A pressure sensor is installed on the inner wall of the inner sealing ring to detect pressure. Both the outer and inner sealing rings are arc-shaped structures, and the inner diameter of the outer sealing ring is the same as the outer diameter of the inner sealing ring. The inner wall of the outer sealing ring can fit against the outer wall of the inner sealing ring. The lower end of the sealing tube has an inclined structure. When the sealing tube is inserted into the soil, the inclined surface can increase the sealing performance with the soil.

[0010] The arc-shaped plate has a first sealing bladder installed on its inner sidewall, and the outer sealing ring has a second sealing bladder installed on its inner sidewall. A first connecting pipe is provided inside the arc-shaped plate, with its upper end connected to the first sealing bladder and its lower end connected to the second sealing bladder. A rubber sealing gasket is installed on a set of sidewalls connected to the inner sidewall of the arc-shaped plate.

[0011] In a preferred embodiment of the present invention, the protective tube is a cavity structure with an open lower end. The protective tube includes an outer protective tube and an inner protective tube. The inner protective tube is located inside the outer protective tube. The cavity between the inner and outer protective tubes is a placement cavity. A temporary storage cavity is provided inside the inner protective tube. A dredging hole is provided at the lower end of the inner protective tube. The dredging hole is connected to the temporary storage cavity.

[0012] Furthermore, a first limiting ring and a second limiting ring are installed inside the branch pipe. The first limiting ring is located at the upper end of the second limiting ring, and the second limiting ring is located at the bottom wall of the lower end of the branch pipe. The upper end of the protective pipe is connected to the second limiting ring. Multiple sets of second connecting pipes are opened inside the second limiting ring. The second connecting pipes are evenly arranged along the circumferential direction. A sensor for flow measurement is also installed inside the branch pipe to detect the water flow in the pipe and determine whether the filter holes are blocked.

[0013] The self-cleaning component includes an inner tube and an outer tube. The upper end of the inner tube is movably disposed within the branch tube, and the inner wall of the upper end of the inner tube has an internal thread for easy subsequent installation. The lower end of the inner tube extends beyond the lower end of the inner protective tube. The lower end of the outer tube is connected to the lower end of the inner tube, and the upper end of the outer tube is movably installed within the placement cavity. A lifting plate with an annular structure is installed on the upper end of the outer tube and is movably installed within the placement cavity. The outer wall of the lifting plate and the inner wall of the outer protective tube are sealed, similar to the connection between a syringe and a piston. A sealing ring is installed on the outer wall of the inner tube. When the lifting plate is located at the lowest point of the outer protective tube, the sealing ring is located at the lowest point of the inner protective tube, which can seal the space between the inner protective tube and the inner tube, also similar to the connection between a syringe and a piston.

[0014] An annular folded bladder is installed between the upper wall of the lifting plate and the upper wall of the placement cavity. The upper wall of the lifting plate, the folded bladder, and the upper wall of the placement cavity are sealed. One end of the second connecting pipe is connected to the space inside the folded bladder, and the other end of the second connecting pipe is connected to the temporary storage cavity. When the lifting plate moves upward along the placement cavity, it can squeeze the folded bladder. The fluid inside the folded bladder enters the temporary storage cavity through the second connecting pipe and is discharged from the dredging hole.

[0015] The outer tube has multiple sets of first filter holes for filtration, and the inner tube has multiple sets of second filter holes for filtration. When the inner tube moves upward, it can drive the outer tube to move upward. The inner protective tube is inserted between the outer tube and the inner tube, and the fluid in the unblocking holes is discharged to unblock the first filter holes and the second filter holes.

[0016] A tapered component is installed at the lower connection position of the inner tube and the outer tube, and a third limiting ring is installed on the outer side wall of the upper end of the tapered component. When the outer tube is placed in the placement cavity, the third limiting ring abuts against the lower end of the outer protective tube.

[0017] The inner tube has an mounting plate installed at its upper end, which is located above the first limiting ring. A magnetic component one is installed on the bottom wall of the mounting plate, and a magnetic component two is installed on the upper wall of the first limiting ring. Magnetic components one and two have opposite magnetic properties. The mounting plate is fixedly and sealed to the first limiting ring via the magnetic components. Multiple sets of insertion holes are opened on the outer wall of the mounting plate, and these holes are evenly arranged circumferentially. Multiple sets of insertion rods are provided, with the number of rods matching the number of insertion holes. When the inner tube extends out of the sealing tube, the upper end of the insertion rod is inserted into the insertion hole, while the lower end of the rod rests against the upper wall of the sealing tube, facilitating the installation of the branch tube.

[0018] The beneficial effects of the present invention after adopting the above structure are as follows: (1) Multiple sealing protection to improve sealing reliability: This device has a multi-seal structure of "connecting ring thread seal, arc plate clamp seal, double bladder seal of the first sealing bladder and the second sealing bladder, and sealing of the lower end of the sealing tube in contact with the soil", which greatly improves the sealing performance of the connection parts, the device and the foundation, and effectively avoids negative pressure leakage; at the same time, the pressure sensor in the sealed space can monitor the pressure change in real time, and can quickly locate the fault when there is air leakage, reduce the troubleshooting and maintenance time, and ensure the drainage progress.

[0019] (2) Self-cleaning and anti-clogging to ensure smooth drainage: This application is equipped with a self-cleaning component. The folding bladder is squeezed by the up and down movement of the inner and outer pipes, so that the fluid is discharged from the unblocking hole. The filter holes on the inner and outer pipes can be automatically unblocked. During the installation stage, the outer pipe is stored in the placement cavity, which avoids the soil from directly blocking the filter hole when it is inserted into the ground, and further ensures the smoothness of the drainage channel.

[0020] (3) Easy and efficient installation, reducing construction difficulty: The device uses a rod to fix the inner pipe, sealing pipe and branch pipe simultaneously. Driven by the hydraulic rod, the branch pipe can be quickly and smoothly inserted into the ground with the help of the conical part. The relative movable design of the inner pipe and branch pipe realizes the step-by-step installation mode of "first inserting and positioning as a whole, then unfolding the outer pipe to pump water", which reduces the difficulty of construction operation and improves the installation efficiency. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0022] Figure 1 This is a schematic diagram of the branch pipe structure of a drainage device for foundation pits in building construction proposed in this invention; Figure 2 This is a cross-sectional view of the branch pipes of a drainage device for foundation pits used in building construction, as proposed in this invention. Figure 3 for Figure 2 A magnified view of a portion at point A; Figure 4 for Figure 3 A magnified view of a portion at point B; Figure 5 This is a cross-sectional view showing the positional relationship between the branch pipe, inner pipe, and first limiting ring proposed in this invention; Figure 6 for Figure 5 A magnified view of a portion at point C; Figure 7 This is a cross-sectional view showing the connection relationship between the protective tube, inner tube, and outer tube proposed in this invention. Figure 8 for Figure 7A magnified view of a portion at point D; Figure 9 for Figure 7 A magnified view of a portion at point E; Figure 10 This is a cross-sectional view of the connection relationship between the inner and outer tubes proposed in this invention. Figure 11 for Figure 10 A magnified view of a portion at point F; Figure 12 This is a top view of the branch pipes of a drainage device for foundation pits used in building construction, as proposed in this invention. Figure 13 This is a schematic diagram of the structure of a drainage device for foundation pits in building construction proposed in this invention, in which the upper end of the inner pipe extends out of the sealing pipe. Figure 14 This is a partial exploded view of a drainage device for foundation pits used in building construction proposed in this invention; Figure 15 This is a schematic diagram of the overall structure of a drainage device for foundation pits used in building construction proposed in this invention.

[0023] In the attached diagram: 1. Main pipe; 2. Connecting bend; 3. Insert rod; 4. Branch pipe; 5. Sealing pipe; 6. Protective pipe; 7. Sealing assembly; 8. Self-cleaning assembly; 9. Limiting rod; 10. Arc plate; 11. Outer sealing ring; 12. Connecting ring; 13. Inner sealing ring; 14. Pressure sensor; 15. First sealing bladder; 16. Second sealing bladder; 17. First connecting pipe; 18. Rubber sealing gasket; 19. Outer protective pipe. 20. Inner protective tube; 21. Temporary storage cavity; 22. Unblocking hole; 23. First limiting ring; 24. Second limiting ring; 25. Second connecting pipe; 26. Inner tube; 27. Outer tube; 28. Lifting plate; 29. ​​Sealing ring; 30. Folding bladder; 31. First filter hole; 32. Second filter hole; 33. Conical piece; 34. Third limiting ring; 35. Mounting plate; 36. Insertion hole; 37. Clamp; 38. Foundation pit. Detailed Implementation

[0024] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Example

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, a drainage device for foundation pits in building construction includes a main pipe 1, a connecting bend 2, a plug 3, and branch pipes 4. The main pipe 1 is connected to the branch pipes 4 via the connecting bend 2. A sealing pipe 5 is connected to the upper end of the branch pipes 4, and a protective pipe 6 is connected to the lower end of the branch pipes 4. A sealing component 7 is movably installed inside the sealing pipe 5, and a self-cleaning component 8 is movably installed inside the branch pipes 4. The self-cleaning component 8 is movably installed outside the protective pipe 6. The sealing assembly 7 is provided with multiple sets of fixing components. The fixing components are movably installed on the side wall of the sealing tube 5. The multiple sets of fixing components are evenly spaced along the circumference of the sealing tube 5. The fixing components include a limiting rod 9, an arc plate 10 and an outer sealing ring 11. The limiting rod 9 is movably installed through the side wall of the sealing tube 5. The arc plate 10 is located inside the sealing tube 5 and is connected to one end of the limiting rod 9 located inside the sealing tube 5. The outer sealing ring 11 is installed on the outer bottom wall of the arc plate 10.

[0027] A connecting ring 12 is installed on the inner wall of the sealing tube 5. A threaded hole is opened on the inner wall of the connecting ring 12 to facilitate the installation of the connecting bend 2. An inner sealing ring 13 is installed on the upper wall of the connecting ring 12. The arc plate 10 is movably disposed on the upper wall of the inner sealing ring 13. A pressure sensor 14 is installed on the inner wall of the inner sealing ring 13 for detecting pressure. Both the outer sealing ring 11 and the inner sealing ring 13 are arc-shaped structures, and the inner diameter of the outer sealing ring 11 is the same as the outer diameter of the inner sealing ring 13. The inner wall of the outer sealing ring 11 can fit against the outer wall of the inner sealing ring 13. The lower end of the sealing tube 5 is an inclined structure. When the sealing tube 5 is inserted into the soil, the inclined surface can increase the sealing performance with the soil.

[0028] The inner wall of the arc plate 10 is equipped with a first sealing bladder 15, the inner wall of the outer sealing ring 11 is equipped with a second sealing bladder 16, a first connecting pipe 17 is opened in the arc plate 10, the upper end of the first connecting pipe 17 is connected to the first sealing bladder 15, and the lower end is connected to the second sealing bladder 16. A rubber sealing gasket 18 is installed on a set of sidewalls connected to the inner wall of the arc plate 10. It should be noted that after the connecting bend 2 is inserted into the connecting ring 12 inside the sealing tube 5, the connecting bend 2 and the sealing tube 5 are sealed together by threads. The inner diameter of the arc plate 10 is the same as the outer diameter of the connecting bend 2. The arc plate 10 is pushed to move closer to the connecting bend 2. The inner walls of multiple sets of arc plates 10 are set to fit against the connecting bend 2, and the outer sealing ring 11 is set to fit against the inner sealing ring 13. The arc plate 10 is fixed by the clamp 37. At this time, the gas in the first sealing bladder 15 and the gas pressure in the second sealing bladder 16 are in a balanced state. The first sealing bladder 15 is sealed to the connecting bend 2, and the second sealing bladder 16 is sealed to the inner sealing ring 13. Multiple sets of arc plates 10 form a complete ring. The arc plates 10 are sealed together by rubber sealing gaskets 18. The space between the outer side of the connecting bend 2, the bottom wall of the arc plate 10 forming the ring, the inner sealing ring 13, and the upper wall of the connecting ring 12 forms a sealed space. The pressure sensor 14 is located in the sealed space to detect the pressure within the sealed space. When there is an air leak at the threaded connection between the connecting bend 2 and the sealing pipe 5, the sealed space can temporarily seal the space. Furthermore, as the pressure value sensed by the pressure sensor 14 decreases, the data signal is promptly transmitted to the staff, facilitating the staff to quickly locate and repair the leaking connecting bend 2 and sealing pipe 5, reducing troubleshooting time, improving work efficiency, and minimizing the impact on the overall pumping and drainage progress. Example

[0029] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 13 , Figure 14 and Figure 15 As shown, the protective tube 6 is a cavity structure with an open lower end. The protective tube 6 includes an outer protective tube 19 and an inner protective tube 20. The inner protective tube 20 is located inside the outer protective tube 19. The cavity between the inner protective tube 20 and the outer protective tube 19 is a placement cavity. A temporary storage cavity 21 is provided inside the inner protective tube 20. A dredging hole 22 is provided at the lower end of the inner protective tube 20. The dredging hole 22 is connected to the temporary storage cavity 21.

[0030] The branch pipe 4 is equipped with a first limiting ring 23 and a second limiting ring 24. The first limiting ring 23 is located at the upper end of the second limiting ring 24, and the second limiting ring 24 is located at the bottom wall of the lower end of the branch pipe 4. The upper end of the protective pipe 6 is connected to the second limiting ring 24. Multiple sets of second connecting pipes 25 are opened in the second limiting ring 24. The second connecting pipes 25 are evenly arranged in the circumferential direction. A sensor for flow measurement is also installed in the branch pipe 4 to detect the water flow in the pipe and determine whether the filter hole is blocked.

[0031] The self-cleaning component includes an inner tube 26 and an outer tube 27. The upper end of the inner tube 26 is movably disposed within the branch pipe 4, and the inner wall of the upper end of the inner tube 26 has an internal thread for easy subsequent installation. The lower end of the inner tube 26 extends beyond the lower end of the inner protective tube 20. The lower end of the outer tube 27 is connected to the lower end of the inner tube 26, and the upper end of the outer tube 27 is movably installed within the placement cavity. A lifting plate 28, which has an annular structure, is installed on the upper end of the outer tube 27 and is movably installed within the placement cavity. The outer wall of the lifting plate 28 and the inner wall of the outer protective tube 19 are sealed, and the inner wall of the lifting plate 28 and the outer wall of the inner protective tube 20 are sealed, similar to the connection between a syringe and a piston. A sealing ring 29 is installed on the outer wall of the inner tube 26. When the lifting plate 28 is located at the lowest end of the outer protective tube 19, the sealing ring 29 is located at the lowest end of the inner protective tube 20, which can seal the space between the inner protective tube 20 and the inner tube 26, which is also similar to the connection between a syringe and a piston. It should be noted that if initially, the outer tube 27 is placed inside the placement cavity and the entire device is in a compressed state, the inner tube 26 extends out of the upper end of the sealing tube 5; the inner tube 26 moves down, causing the outer tube 27 to move down, and the outer tube 27 is gradually pulled out from the placement cavity.

[0032] An annular folded bladder 30 is installed between the upper wall of the lifting plate 28 and the upper wall of the placement cavity. The upper wall of the lifting plate 28, the folded bladder 30 and the upper wall of the placement cavity are sealed. One end of the second connecting pipe 25 is connected to the space inside the folded bladder 30, and the other end of the second connecting pipe 25 is connected to the temporary storage cavity 21. When the lifting plate 28 moves upward along the placement cavity, it can squeeze the folded bladder 30. The fluid in the folded bladder 30 enters the temporary storage cavity 21 through the second connecting pipe 25 and is discharged from the dredging hole 22.

[0033] The outer tube 27 has multiple sets of first filter holes 31 for filtration, and the inner tube 26 has multiple sets of second filter holes 32 for filtration. When the inner tube 26 moves upward, it can drive the outer tube 27 to move upward. The inner protective tube 20 is inserted between the outer tube 27 and the inner tube 26, and the fluid in the unblocking hole 22 is discharged to unblock the first filter holes 31 and the second filter holes 32.

[0034] A tapered component 33 is installed at the lower connection position of the inner tube 26 and the outer tube 27. A third limiting ring 34 is installed on the outer side wall of the upper end of the tapered component 33. When the outer tube 27 is placed in the placement cavity, the third limiting ring 34 abuts against the lower end of the outer protective tube 19.

[0035] An mounting plate 35 is installed at the upper end of the inner tube 26. The mounting plate 35 is located at the upper end of the first limiting ring 23. A magnetic component 1 is installed on the bottom wall of the mounting plate 35, and a magnetic component 2 is installed on the upper wall of the first limiting ring 23. The magnetic components 1 and 2 have opposite magnetic properties. The mounting plate 35 is fixedly and sealed to the first limiting ring 23 through the magnetic components. Multiple sets of insertion holes 36 are opened on the outer wall of the mounting plate 35. The multiple sets of insertion holes 36 are evenly arranged along the circumferential direction. Multiple sets of insertion rods 3 are provided. The number of insertion rods 3 is the same as the number of insertion holes 36, and they are matched with the insertion holes 36. When the inner tube 26 extends out of the sealing tube 5, the upper end of the insertion rod 3 is inserted into the insertion hole 36. At this time, the lower end of the insertion rod 3 is set against the upper wall of the sealing tube 5, which facilitates the installation of the branch tube 4. It should be noted that the installation steps for branch pipe 4 are as follows: Initially, the upper end of the inner tube 26 extends out of the sealing tube 5, and the outer tube 27 is placed inside the placement cavity. The entire device is in a compressed state. The upper end of the insertion rod 3 is inserted into the insertion hole 36, and the lower end of the insertion rod 3 abuts against the upper wall of the sealing tube 5. The external threaded rod is connected to the inner tube 26 by threads and is connected to the hydraulic rod. The hydraulic rod drives the inner tube 26 through the threaded rod. The inner tube 26 drives the sealing tube 5 and the branch pipe 4 to move down synchronously through the insertion rod 3. The tapered part 33 at the lower end of the inner tube 26 facilitates the insertion of the branch pipe 4 into the ground. After the lower ends of the branch pipe 4 and the sealing pipe 5 are inserted into the ground, the hydraulic rod stops working. Under the premise of ensuring safety, the insertion rod 3 is taken out from the insertion hole 36. Then the hydraulic rod continues to work. Under the action of the hydraulic rod and the threaded rod, the inner pipe 26 continues to move down along the branch pipe 4. The outer pipe 27 is gradually pulled out from the placement cavity and extends into the groundwater. This combination method can reduce the impact of soil on the filter hole during the insertion into the ground. After the installation is completed, the hydraulic rod is separated from the threaded rod, and then the threaded rod is removed from the inner pipe 26. The lower end of the connecting bend 2 is connected to the connecting ring 12 in the sealing pipe 5 by a thread, and the upper end of the connecting bend 2 is connected to the main pipe 1. The main pipe 1 is connected to the vacuum pump for extracting groundwater.

[0036] The specific usage is as follows: Check the integrity of each component of the device to ensure that none of them are damaged; the upper end of the inner tube 26 extends out of the sealing tube 5, and the outer tube 27 is stored in the placement cavity, and the device is in a compressed state; insert multiple sets of insert rods 3 into the corresponding insertion holes 36 of the mounting plate 35, so that the lower end of the insert rod 3 abuts against the upper wall of the sealing tube 5, thereby fixing the inner tube 26, the sealing tube 5, and the branch tube 4 relatively; connect the external threaded rod to the internal thread at the upper end of the inner tube 26, and connect and fix the other end of the threaded rod to the hydraulic rod; start the hydraulic rod, and drive the inner tube 26 to move down through the threaded rod. The inner tube 26 drives the sealing tube 5 and the branch tube 4 to move down synchronously through the insert rod 3. Use the tapered part 33 at the lower end of the inner tube 26 to smoothly insert the branch tube 4 and the sealing tube 5 into the ground until the lower ends of the branch tube 4 and the sealing tube 5 are completely embedded in the soil, and then stop the hydraulic rod.

[0037] Under the premise of ensuring construction safety, pull out the insertion rods 3 one by one from the insertion holes 36; restart the hydraulic rod to drive the inner tube 26 to continue to move down along the branch pipe 4, and the inner tube 26 drives the outer tube 27 to be gradually pulled out from the placement cavity until the first filter hole 31 on the outer tube 27 is completely inserted into the groundwater; close the hydraulic rod, disconnect the connection between the hydraulic rod and the threaded rod, and then disassemble the threaded rod from the inner tube 26.

[0038] Tighten the lower end of the connecting bend 2 to the connecting ring 12 inside the sealing tube 5 by screwing it in. Push the arc plate 10 towards the connecting bend 2 and fix the arc plate 10 with the clamp 37. At this time, the inner wall of the arc plate 10 is in contact with the outer wall of the connecting bend 2, the outer sealing ring 11 is in contact with the inner sealing ring 13, the first sealing bladder 15 and the connecting bend 2, and the second sealing bladder 16 and the inner sealing ring 13 form a sealed connection. The arc plates 10 are sealed with rubber sealing gaskets 18. Connect and fix the upper end of the connecting bend 2 to the main pipe 1. Connect the other end of the main pipe 1 to the vacuum pump. Check the installation status of the pressure sensor 14 to ensure that it can monitor the pressure in the sealed space normally.

[0039] The vacuum pump is started, and groundwater is extracted through the channel consisting of main pipe 1, connecting bend 2, branch pipe 4, inner pipe 26, and outer pipe 27. The groundwater enters the inner pipe 26 through the first filter hole 31 and the second filter hole 32, and then exits through the branch pipe 4, connecting bend 2, and main pipe 1 in sequence. During the pumping process, the data of pressure sensor 14 is monitored in real time. If the pressure value decreases abnormally, the leaking connection is located and repaired in time. If the pumping efficiency is found to be reduced, the connecting bend 2 at that location is disassembled, and the threaded rod is inserted into the branch pipe 4 and connected to the inner pipe 26 by threads. The other end of the threaded rod is connected to the external drive structure, which drives the inner pipe 26 to move up and down, so that the lifting plate 28 squeezes the folded bladder 30, and the fluid is discharged from the unblocking hole 22, which self-cleans the first filter hole 31 and the second filter hole 32.

[0040] After the basic construction is completed, turn off the vacuum pump; disconnect the main pipe 1 from the vacuum pump, the main pipe 1 from the connecting bend 2, and the connecting bend 2 from the sealing pipe 5 in sequence; reconnect the inner pipe 26 through the hydraulic rod and the threaded rod, drive the inner pipe 26 to move upward, and drive the outer pipe 27 back into the placement cavity; start the hydraulic rod to lift the inner pipe 26 upward, and pull the branch pipe 4 and the sealing pipe 5 out of the ground, completing the dismantling and recycling of the device.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A drainage device for foundation pits used in building construction, characterized in that: It includes a main pipe, a connecting bend, a plug, and branch pipes. The main pipe is connected to the branch pipes via the connecting bend. A sealing pipe is connected to the upper end of the branch pipe, and a protective pipe is connected to the lower end of the branch pipe. A sealing component is movably installed inside the sealing pipe, and a self-cleaning component is movably installed inside the branch pipe. The outside of the self-cleaning component is movably installed inside the protective pipe. The sealing assembly contains multiple sets of fixing components, which are movably installed on the side wall of the sealing tube. The multiple sets of fixing components are evenly spaced along the circumference of the sealing tube. Each fixing component includes a limiting rod, an arc-shaped plate, and an outer sealing ring. The limiting rod is movably installed through the side wall of the sealing tube. The arc-shaped plate is located inside the sealing tube and is connected to one end of the limiting rod located inside the sealing tube. The outer sealing ring is installed on the outer bottom wall of the arc-shaped plate.

2. The drainage device for foundation pits used in building construction according to claim 1, characterized in that: A connecting ring is installed on the inner wall of the sealing tube, and an inner sealing ring is installed on the upper wall of the connecting ring. The arc-shaped plate is movably disposed on the upper wall of the inner sealing ring. A pressure sensor is installed on the inner wall of the inner sealing ring. Both the outer sealing ring and the inner sealing ring are arc-shaped structures, and the inner diameter of the outer sealing ring is the same as the outer diameter of the inner sealing ring. The inner wall of the outer sealing ring can fit against the outer wall of the inner sealing ring. The lower end of the sealing tube is an inclined structure.

3. The drainage device for foundation pits used in building construction according to claim 2, characterized in that: A first sealing bladder is installed on the inner sidewall of the arc-shaped plate, and a second sealing bladder is installed on the inner sidewall of the outer sealing ring. A first connecting pipe is provided inside the arc-shaped plate, with the upper end of the first connecting pipe connected to the first sealing bladder and the lower end connected to the second sealing bladder. A rubber sealing gasket is installed on a set of sidewalls connected to the inner sidewall of the arc-shaped plate.

4. The drainage device for foundation pits used in building construction according to claim 3, characterized in that: The protective tube is a hollow structure with an open bottom. The protective tube includes an outer protective tube and an inner protective tube. The inner protective tube is located inside the outer protective tube. The cavity between the inner and outer protective tubes is a placement cavity. A temporary storage cavity is opened inside the inner protective tube. A dredging hole is opened at the lower end of the inner protective tube. The dredging hole is connected to the temporary storage cavity.

5. The drainage device for foundation pits used in building construction according to claim 4, characterized in that: The branch pipe is equipped with a first limiting ring and a second limiting ring. The first limiting ring is located at the upper end of the second limiting ring, and the second limiting ring is located at the bottom wall of the lower end of the branch pipe. The upper end of the protective pipe is connected to the second limiting ring. Multiple sets of second connecting pipes are opened inside the second limiting ring, and the second connecting pipes are evenly arranged along the circumferential direction.

6. The drainage device for foundation pits used in building construction according to claim 5, characterized in that: The self-cleaning component includes an inner tube and an outer tube. The upper end of the inner tube is movably disposed within the branch tube, and the lower end of the inner tube extends out of the lower end of the inner protective tube. The lower end of the outer tube is connected to the lower end of the inner tube, and the upper end of the outer tube is movably installed in the placement cavity. A lifting plate is installed on the upper end of the outer tube and is movably installed in the placement cavity. A sealing ring is installed on the outer side wall of the inner tube.

7. The drainage device for foundation pits in building construction according to claim 6, characterized in that: An annular folded bladder is installed between the upper wall of the lifting plate and the upper wall of the placement cavity. One end of the second connecting tube is connected to the space inside the folded bladder, and the other end of the second connecting tube is connected to the temporary storage cavity.

8. The drainage device for foundation pits used in building construction according to claim 7, characterized in that: The outer tube has multiple sets of first filter holes for filtration, and the inner tube has multiple sets of second filter holes for filtration.

9. The drainage device for foundation pits used in building construction according to claim 8, characterized in that: A tapered component is installed at the lower connection position of the inner tube and the outer tube. A third limiting ring is installed on the outer side wall of the upper end of the tapered component. When the outer tube is placed in the placement cavity, the third limiting ring abuts against the lower end of the outer protective tube.

10. The drainage device for foundation pits in building construction according to claim 9, characterized in that: An mounting plate is installed at the upper end of the inner tube. The mounting plate is located at the upper end of the first limiting ring. A magnetic component one is installed on the bottom wall of the mounting plate, and a magnetic component two is installed on the upper wall of the first limiting ring. Magnetic components one and two have opposite magnetic properties. Multiple sets of insertion holes are opened on the outer wall of the mounting plate. The multiple sets of insertion holes are evenly arranged along the circumferential direction. Multiple sets of insertion rods are provided. The number of insertion rods in the multiple sets is the same as the number of insertion holes, and they are matched with the insertion holes. When the inner tube extends out of the sealing tube, the upper end of the insertion rod is inserted into the insertion hole. At this time, the lower end of the insertion rod is set against the upper wall of the sealing tube.

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