Turnover fabricated foundation pit drainage device and construction method

Abstract

The invention relates to the technical field of foundation pit drainage devices, in particular to a turnover assembly type foundation pit drainage device and a construction method.The turnover assembly type foundation pit drainage device comprises a box cage base, a box cage body and a water pump, a motor protection box is fixed to the forehead inner wall of the box cage body, a motor is fixed in the motor protection box, and a transmission shaft of the motor is rotationally connected to the box cage body; a mounting ring is fixed on a transmission shaft of the motor, a mounting plate is fixed on the mounting ring, and a scraper is movably mounted on the mounting plate; the device has the beneficial effects that when small holes in the box cage body are blocked by stones, a battery supplies power to a motor, a transmission shaft of the motor drives a mounting plate to rotate through a mounting ring, the mounting plate drives a scraping plate to rotate, and the scraping plate scrapes the surface of the box cage body in the rotating process; when the pebbles are scraped off, the pebbles which are clamped by stuffing the sharp parts into the small holes of the box cage body are scraped off, so that the small holes of the box cage body are communicated, and the efficiency that water flows into the box cage formed by the box cage base and the box cage body is recovered.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit drainage devices, and in particular to a rotatable assembled foundation pit drainage device and a construction method. Background Art

[0002] The reusable prefabricated foundation pit drainage system is a modular system used for temporary drainage in construction projects. It is assembled on-site from prefabricated components in a factory. It is reusable, quick to assemble and disassemble, and environmentally friendly and energy-efficient. Its core design goal is to address the single-use drawbacks of traditional brick drains, reducing construction waste and lowering project costs.

[0003] In the prior art, a common rotatable assembled foundation pit drainage device is usually composed of a water pump and a cage. When in use, the water pump is fixed to the cage base by screws, and then the cage body is installed on the cage base. A large number of small holes are opened on the cage body for water to pass through and for isolating stones and other debris contained in the muddy water in the foundation pit outside the cage body, thereby protecting the water pump. When in use, the device is assembled and placed in the foundation pit, and the water in the foundation pit can be discharged through the water pump. After use, the device is fished out of the foundation pit and disassembled, so that each device can be conveniently maintained and rotated for next use.

[0004] However, in the conventional assembled foundation pit drainage device, the small holes on the cage body are often plugged by the tips of stones flowing with the water flow, resulting in blockage of the small holes, which in turn reduces the efficiency of water flowing into the cage and reduces the drainage efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a recyclable assembled foundation pit drainage device and a construction method to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotatable assembled foundation pit drainage device, comprising: a cage base, a cage body and a water pump, the water pump being movably mounted on the top of the cage base by screw connection, the cage body being movably mounted on the top of the cage base, a plurality of groups of small holes being provided on the cage body, a motor protection box being fixed on the inner wall of the cage body, a motor being fixed in the motor protection box, a drive shaft of the motor being rotatably connected to the cage body, a mounting ring being fixed on the drive shaft of the motor, a mounting plate being fixed on the mounting ring, a scraper being movably mounted on the mounting plate, and the scraper being resting on the outer wall of the cage body.

[0007] Preferably, a mounting groove is provided on the mounting plate, and the mounting groove is a convex groove structure. A lining plate is fixed on the scraper, and the shape of the lining plate matches the mounting groove, and the lining plate is movably inserted in the mounting groove.

[0008] Preferably, a card slot is provided on the lining plate, and a card slot insertion hole is provided on the mounting plate, one end of the card buckle is movably inserted in the card slot, and the other end of the card buckle is movably inserted in the card slot insertion hole and extends from the card slot insertion hole away from the end of the card slot.

[0009] Preferably, a limit plate installation slot is provided on the buckle, a limit slot is provided on the slot insertion hole, one end of the limit plate is movably inserted in the limit plate installation slot, and the other end of the limit plate is movably inserted in the limit slot.

[0010] Preferably, a limiting spring is fixed between one end of the limiting plate and the inner wall of the limiting plate mounting groove, a shift plate groove is opened on the mounting plate, a shift plate is slidably connected in the shift plate groove, the shift plate has an "L"-shaped plate structure, and one end of the shift plate is movably inserted in the limiting groove.

[0011] Preferably, a cage mounting groove is opened on the surface of the cage base, and the cage mounting groove is a rectangular groove structure. A cage mounting rod is fixed to the bottom end of the cage body, and the shape of the cage mounting rod matches the cage mounting groove, and the cage mounting rod is movably inserted into the cage mounting groove.

[0012] Preferably, a cage mounting screw hole is provided on the cage base, a cage mounting screw is rotatably connected to the cage mounting rod, and the cage mounting screw is installed in the cage mounting screw hole through a threaded connection.

[0013] Preferably, a motor protection cover is movably connected to the motor protection box.

[0014] Preferably, a drainage pipe is fixed on the water pump, a pipe hole is opened on the cage body, and the drainage pipe is movably inserted into the pipe hole.

[0015] A recyclable prefabricated foundation pit construction method, comprising a recyclable prefabricated foundation pit drainage device and the following steps:

[0016] Step 1: Assemble the recyclable assembled foundation pit drainage device: fix the water pump on the top of the cage base by screw connection, pass one end of the drainage pipe through the pipe hole and fix it on the water outlet of the water pump, then insert the cage mounting rods fixed at the bottom end of the cage body into the cage mounting grooves opened on the cage base, screw the cage mounting screws into the cage mounting screw holes, so that the cage body is installed on the cage base, and the assembly of the recyclable assembled foundation pit drainage device is completed;

[0017] Step 2: Drain the foundation pit through a removable assembled foundation pit drainage device: insert one end of the rope into and tie it to the cage body, fix the other end of the rope to the hook of the crane, lift the device by the crane and place it into the foundation pit, leave the end of the drainage pipe extending from the pipe hole on the shore and insert it into the reserved drainage ditch, the water in the foundation pit flows into the cage body through the small holes on the cage body, start the water pump to suck water from the water inlet of the water pump and pump it out from the discharge port of the water pump, and then discharge it into the drainage ditch through the drainage pipe;

[0018] Step 3: Remove the stones on the cage body: When the small holes on the cage body are blocked by stones, the battery powers the motor, and the drive shaft of the motor drives the mounting plate to rotate through the mounting ring, and the mounting plate drives the scraper to rotate. The scraper scrapes the surface of the cage body during the rotation process, and the stones stuck in the small holes of the cage body are scraped off, thereby restoring the penetration of the small holes of the cage body and restoring the efficiency of water flowing into the cage composed of the cage base and the cage body;

[0019] Step 4: Perform maintenance on the recyclable assembled foundation pit drainage device: After completing the foundation pit drainage, lift the device out of the foundation pit, then remove the cage body from the cage base, and then remove the water pump from the cage base, inspect the water pump, and complete the maintenance of the water pump; then remove the motor protection cover from the motor protection box, charge the battery, and after charging is completed, install the motor protection cover back on the motor protection box to restore the waterproof protection of the motor and battery, and complete the maintenance of the battery; finally, move the dial plate, the dial plate moves in the dial plate slot, push the limit plate out of the limit slot, and remove the buckle from the slot and Pull it out from the slot plug-in hole, and then the liner and scraper can be removed from the mounting slot. If the scraper is lightly worn, clean the scraper. If the scraper is heavily worn, replace the liner and scraper. Then insert the cleaned or replaced liner back into the mounting slot, manually press the limit plate completely into the limit plate mounting slot to compress the limit spring, and then insert the buckle back into the slot along the slot plug-in hole. After the limit plate mounting slot is aligned with the limit slot, the limit spring pushes one end of the limit plate into the limit slot. The maintenance of the scraper is completed, and the maintenance of the entire turnover assembled foundation pit drainage device can be completed.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention proposes a recyclable assembled foundation pit drainage device and construction method. When the small holes on the cage body are blocked by stones, the battery powers the motor, and the drive shaft of the motor drives the mounting plate to rotate through the mounting ring, and the mounting plate drives the scraper to rotate. During the rotation, the scraper scrapes the surface of the cage body, inserts the tip into the small holes of the cage body, and scrapes off the stuck stones, thereby restoring the penetration of the small holes of the cage body and restoring the efficiency of water flowing into the cage composed of the cage base and the cage body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the water pump installation structure;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0025] Figure 4 Schematic diagram of the cross-section structure of the installation groove;

[0026] Figure 5 for Figure 4 A schematic diagram of the structure at center A;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point B in the middle;

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the cage installation slot;

[0029] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C in the middle.

[0030] In the figure: cage base 1, cage body 2, water pump 3, motor 4, battery 5, mounting ring 6, mounting plate 7, mounting groove 8, lining plate 9, scraper 10, card slot 11, card slot plug-in hole 12, buckle 13, limit plate mounting groove 14, limit slot 15, limit plate 16, limit spring 17, paddle plate groove 18, paddle plate 19, cage body mounting groove 20, cage body mounting rod 21, cage body mounting screw hole 22, cage body mounting screw 23, motor protection box 24, motor protection cover 25, pipe hole 26, drain pipe 27. DETAILED DESCRIPTION

[0031] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1 to 8 The present invention provides a technical solution: a rotatable assembled foundation pit drainage device, comprising: a cage base 1, a cage body 2 and a water pump 3, the water pump 3 is movably mounted on the top of the cage base 1 through screw connection, the cage body 2 is movably mounted on the top of the cage base 1, and a plurality of small holes are opened on the cage body 2. A motor protection box 24 is fixed on the inner wall of the cage body 2, and a motor 4 is fixed in the motor protection box 24. The drive shaft of the motor 4 is rotatably connected to the cage body 2, and a mounting ring 6 is fixed on the drive shaft of the motor 4. A mounting plate 7 is fixed on the mounting ring 6. A scraper 10 is movably mounted on the mounting plate 7, and the scraper 10 is against the outer wall of the cage body 2.

[0033] When the small holes on the cage body 2 are blocked by stones, the battery 5 supplies power to the motor 4, and the drive shaft of the motor 4 drives the mounting plate 7 to rotate through the mounting ring 6, and the mounting plate 7 drives the scraper 10 to rotate. During the rotation process, the scraper 10 scrapes the surface of the cage body 2, and the stones stuck in the small holes of the cage body 2 are scraped off, thereby restoring the penetration of the small holes of the cage body 2 and restoring the efficiency of water flowing into the cage formed by the cage base 1 and the cage body 2.

[0034] Example 2: On the basis of Example 1, in order to realize drainage of the foundation pit through a rotatable assembled foundation pit drainage device, a drainage pipe 27 is fixed on the water pump 3, and a pipe hole 26 is opened on the cage body 2. The drainage pipe 27 is movably inserted in the pipe hole 26. A cage mounting groove 20 is opened on the surface of the cage base 1. The cage mounting groove 20 is a rectangular groove structure. A cage mounting rod 21 is fixed to the bottom end of the cage body 2. The shape of the cage mounting rod 21 matches the cage mounting groove 20. The cage mounting rod 21 is movably inserted in the cage mounting groove 20. A cage mounting screw hole 22 is opened on the cage base 1. A cage mounting screw 23 is rotatably connected to the cage mounting rod 21. The cage mounting screw 23 is installed in the cage mounting screw hole 22 through a threaded connection.

[0035] The water pump 3 is fixedly mounted on the top of the cage base 1 by screw connection, one end of the drainage pipe 27 is passed through the pipe hole 26 and fixed on the water outlet of the water pump 3, and then the cage mounting rods 21 fixed to the bottom end of the cage body 2 are inserted into the cage mounting grooves 20 opened on the cage base 1, and the cage mounting screws 23 are screwed into the cage mounting screw holes 22, so that the cage body 2 is installed on the cage base 1, and the turnover assembled foundation pit drainage device is completed. Assembly of the device; pass one end of the rope through and tie it to the cage body 2, fix the other end of the rope on the hook of the crane, lift the device by the crane and place it into the foundation pit, and leave one end of the drainage pipe 27 extending from the pipe hole 26 on the shore and insert it into the reserved drainage ditch. The water in the foundation pit flows into the cage body 2 through the small holes on the cage body 2, and the water pump 3 is started to suck water from the water inlet of the water pump 3 and pump it out from the discharge port of the water pump 3, and then discharged into the drainage ditch through the drainage pipe 27.

[0036] Example 3: On the basis of Example 2, in order to realize the maintenance of the turnover assembled foundation pit drainage device, a mounting groove 8 is provided on the mounting plate 7, and the mounting groove 8 is a "convex" shaped groove structure. A lining plate 9 is fixed on the scraper 10, and the shape of the lining plate 9 matches the mounting groove 8. The lining plate 9 is movably inserted in the mounting groove 8. A card slot 11 is provided on the lining plate 9, and a card slot plug hole 12 is provided on the mounting plate 7. One end of a card buckle 13 is movably inserted in the card slot 11, and the other end of the card buckle 13 is movably inserted in the card slot plug hole 12 and extends from the card slot plug hole 12 at the end away from the card slot 11. A limit plate mounting groove 14 is provided on the buckle 13, and a limit groove 15 is provided on the slot plug-in hole 12. One end of the limit plate 16 is movably inserted in the limit plate mounting groove 14, and the other end of the limit plate 16 is movably inserted in the limit groove 15. A limit spring 17 is fixed between one end of the limit plate 16 and the inner wall of the limit plate mounting groove 14. A dial plate groove 18 is provided on the mounting plate 7, and a dial plate 19 is slidably connected to the dial plate groove 18. The dial plate 19 has an "L"-shaped plate structure. One end of the dial plate 19 is movably inserted in the limit groove 15, and a motor protection cover 25 is movably connected to the motor protection box 24.

[0037] After the foundation pit drainage is completed, the device is lifted out of the foundation pit, and then the cage body 2 is removed from the cage base 1, and then the water pump 3 is removed from the cage base 1, and the water pump 3 is repaired to complete the maintenance of the water pump 3; then the motor protection cover 25 is removed from the motor protection box 24, and the battery 5 is charged. After the charging is completed, the motor protection cover 25 is installed back on the motor protection box 24 to restore the waterproof protection of the motor 4 and the battery 5, and the maintenance of the battery 5 is completed; finally, the dial plate 19 is toggled, and the dial plate 19 moves in the dial plate slot 18, pushing the limit plate 16 out of the limit slot 15, and pulling out the buckle 13 from the slot 11 and the slot insertion hole 12, and then the lining can be removed. The plate 9 and the scraper 10 are removed from the mounting groove 8. If the scraper 10 is lightly worn, the scraper 10 is cleaned. If the scraper 10 is heavily worn, the lining plate 9 and the scraper 10 are replaced. Then the cleaned or replaced lining plate 9 is inserted back into the mounting groove 8. Manually press the limit plate 16 completely into the limit plate mounting groove 14 to compress the limit spring 17. Then insert the buckle 13 back into the slot 11 along the slot plug-in hole 12. After the limit plate mounting groove 14 is aligned with the limit groove 15, the limit spring 17 pushes one end of the limit plate 16 into the limit groove 15. The maintenance of the scraper 10 is completed, and the maintenance of the entire turnover assembled foundation pit drainage device can be completed.

[0038] In actual use, when the small holes on the cage body 2 are blocked by stones, the battery 5 supplies power to the motor 4, and the transmission shaft of the motor 4 drives the mounting plate 7 to rotate through the mounting ring 6, and the mounting plate 7 drives the scraper 10 to rotate. The scraper 10 scrapes the surface of the cage body 2 during the rotation, and the stones stuck in the small holes of the cage body 2 are scraped off, thereby restoring the penetration of the small holes of the cage body 2 and restoring the efficiency of water flowing into the cage composed of the cage base 1 and the cage body 2; the water pump 3 is fixed to the top of the cage base 1 by screw connection, one end of the drain pipe 27 is passed through the pipe hole 26 and fixed to the water outlet of the water pump 3, and then the fixed part at the bottom end of the cage body 2 is fixed. The fixed groups of cage mounting rods 21 are inserted into the groups of cage mounting grooves 20 opened on the cage base 1, and the cage mounting screws 23 are screwed into the cage mounting screw holes 22, so that the cage body 2 is installed on the cage base 1, and the assembly of the turnover assembled foundation pit drainage device can be completed; one end of the rope is passed through and tied to the cage body 2, and the other end of the rope is fixed to the hook of the crane. The device is lifted by the crane and placed into the foundation pit. The end of the drainage pipe 27 extending from the pipe hole 26 is left on the shore and inserted into the reserved drainage ditch. The water in the foundation pit flows into the cage body 2 through the small holes on the cage body 2, and the water pump 3 is turned on to suck water from the water inlet of the water pump 3 and pump it out from the drain outlet of the water pump 3. , and then discharged into the drainage ditch through the drain pipe 27; after completing the drainage of the foundation pit, the device is hoisted out of the foundation pit, and then the cage body 2 is removed from the cage base 1, and then the water pump 3 is removed from the cage base 1, and the water pump 3 is repaired to complete the maintenance of the water pump 3; then the motor protection cover 25 is removed from the motor protection box 24, and the battery 5 is charged. After the charging is completed, the motor protection cover 25 is installed back on the motor protection box 24 to restore the waterproof protection of the motor 4 and the battery 5, and the maintenance of the battery 5 is completed; finally, the dial plate 19 is toggled, and the dial plate 19 moves in the dial plate slot 18, pushing the limit plate 16 out of the limit slot 15, and pulling the buckle 13 out of the card slot 11 and the card slot plug hole 12. After the scraper 10 is out, the liner 9 and the scraper 10 can be removed from the mounting groove 8. If the scraper 10 is lightly worn, the scraper 10 can be cleaned. If the scraper 10 is heavily worn, the liner 9 and the scraper 10 can be replaced. Then, the cleaned or replaced liner 9 is inserted back into the mounting groove 8, and the limit plate 16 is manually pressed completely into the limit plate mounting groove 14 to compress the limit spring 17. Then, the buckle 13 is inserted back into the slot 11 along the slot plug-in hole 12. After the limit plate mounting groove 14 is aligned with the limit groove 15, the limit spring 17 pushes one end of the limit plate 16 into the limit groove 15. The maintenance of the scraper 10 is completed, and the maintenance of the entire turnover assembled foundation pit drainage device can be completed.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A recyclable assembled foundation pit drainage device, comprising: A cage base (1), a cage body (2) and a water pump (3), wherein the water pump (3) is movably mounted on the top of the cage base (1) through screw connection, the cage body (2) is movably mounted on the top of the cage base (1), and a plurality of small holes are opened on the cage body (2), characterized in that: a motor protection box (24) is fixed on the inner wall of the cage body (2), a motor (4) is fixed in the motor protection box (24), a transmission shaft of the motor (4) is rotatably connected to the cage body (2), a mounting ring (6) is fixed on the transmission shaft of the motor (4), a mounting plate (7) is fixed on the mounting ring (6), a scraper (10) is movably mounted on the mounting plate (7), and the scraper (10) is against the outer wall of the cage body (2).

2. The recyclable assembled foundation pit drainage device according to claim 1, characterized in that: The mounting plate (7) is provided with a mounting groove (8), which is a convex groove structure. A lining plate (9) is fixed on the scraper (10), and the shape of the lining plate (9) matches the mounting groove (8). The lining plate (9) is movably inserted into the mounting groove (8).

3. The recyclable assembled foundation pit drainage device according to claim 2, characterized in that: A card slot (11) is provided on the lining plate (9), and a card slot insertion hole (12) is provided on the mounting plate (7). One end of a buckle (13) is movably inserted into the card slot (11), and the other end of the buckle (13) is movably inserted into the card slot insertion hole (12) and extends from the card slot insertion hole (12) at one end away from the card slot (11).

4. The recyclable assembled foundation pit drainage device according to claim 3, characterized in that: A limit plate installation slot (14) is provided on the buckle (13), a limit slot (15) is provided on the slot insertion hole (12), one end of the limit plate (16) is movably inserted into the limit plate installation slot (14), and the other end of the limit plate (16) is movably inserted into the limit slot (15).

5. The recyclable assembled foundation pit drainage device according to claim 4, characterized in that: A limiting spring (17) is fixed between one end of the limiting plate (16) and the inner wall of the limiting plate mounting groove (14); a shifting plate groove (18) is provided on the mounting plate (7); a shifting plate (19) is slidably connected in the shifting plate groove (18); the shifting plate (19) is an "L"-shaped plate structure; one end of the shifting plate (19) is movably inserted into the limiting groove (15).

6. The recyclable assembled foundation pit drainage device according to claim 1, characterized in that: A cage body mounting groove (20) is provided on the surface of the cage base (1), and the cage body mounting groove (20) is a rectangular groove structure. A cage body mounting rod (21) is fixed to the bottom end of the cage body (2), and the shape of the cage body mounting rod (21) matches the cage body mounting groove (20), and the cage body mounting rod (21) is movably inserted into the cage body mounting groove (20).

7. The recyclable assembled foundation pit drainage device according to claim 6, characterized in that: The cage base (1) is provided with a cage mounting screw hole (22), the cage mounting rod (21) is rotatably connected with a cage mounting screw (23), and the cage mounting screw (23) is installed in the cage mounting screw hole (22) through threaded connection.

8. The recyclable assembled foundation pit drainage device according to claim 1, characterized in that: A motor protection cover (25) is movably connected to the motor protection box (24).

9. The recyclable assembled foundation pit drainage device according to claim 1, characterized in that: A drainage pipe (27) is fixed on the water pump (3), a pipe hole (26) is opened on the cage body (2), and the drainage pipe (27) is movably inserted into the pipe hole (26).

10. A method for constructing a rotatable prefabricated foundation pit using the rotatable prefabricated foundation pit drainage device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: Assemble the recyclable assembled foundation pit drainage device: fix the water pump (3) on the top of the cage base (1) by screw connection, insert one end of the drainage pipe (27) through the pipe hole (26) and fix it on the water outlet of the water pump (3), then insert the cage mounting rods (21) fixed to the bottom end of the cage body (2) into the cage mounting grooves (20) opened on the cage base (1), screw the cage mounting screws (23) into the cage mounting screw holes (22), so that the cage body (2) is installed on the cage base (1), and the assembly of the recyclable assembled foundation pit drainage device is completed; Step 2: Drain the foundation pit through a rotatable assembled foundation pit drainage device: insert one end of the rope into and tie it to the cage body (2), fix the other end of the rope to the hook of the crane, lift the device by the crane and place it into the foundation pit, leave the end of the drainage pipe (27) extending from the pipe hole (26) on the shore and insert it into the reserved drainage channel, the water in the foundation pit flows into the cage body (2) through the small hole on the cage body (2), start the water pump (3) to suck water from the water inlet of the water pump (3) and pump it out from the drainage port of the water pump (3), and then discharge it into the drainage channel through the drainage pipe (27); Step 3: removing stones from the cage body (2): when the small holes on the cage body (2) are blocked by stones, the battery (5) supplies power to the motor (4), the transmission shaft of the motor (4) drives the mounting plate (7) to rotate through the mounting ring (6), and the mounting plate (7) drives the scraper (10) to rotate. The scraper (10) scrapes the surface of the cage body (2) during the rotation process, and scrapes off the stones that are stuck in the small holes of the cage body (2), thereby restoring the penetration of the small holes of the cage body (2) and restoring the efficiency of water flowing into the cage formed by the cage base (1) and the cage body (2); Step 4: Perform maintenance on the recyclable assembled foundation pit drainage device: After completing the foundation pit drainage, lift the device out of the foundation pit, then remove the cage body (2) from the cage base (1), and then remove the water pump (3) from the cage base (1), inspect the water pump (3), and complete the maintenance of the water pump (3); then remove the motor protection cover (25) from the motor protection box (24), charge the battery (5), and after charging is completed, install the motor protection cover (25) back on the motor protection box (24) to restore the waterproof protection of the motor (4) and the battery (5), and complete the maintenance of the battery (5); finally, move the dial plate (19), the dial plate (19) moves in the dial plate slot (18), push the limit plate (16) out of the limit slot (15), and remove the buckle (13) from the card slot (11) and the card slot plug hole (1 2), then the lining plate (9) and the scraper (10) can be removed from the installation groove (8), if the scraper (10) is lightly worn, the scraper (10) is cleaned, if the scraper (10) is heavily worn, the lining plate (9) and the scraper (10) are replaced, and then the cleaned or replaced lining plate (9) is inserted back into the installation groove (8), and the limit plate (16) is manually pressed completely into the limit plate installation groove (14) to compress the limit spring (17), and then the buckle (13) is inserted back into the slot (11) along the slot insertion hole (12), and after the limit plate installation groove (14) is aligned with the limit groove (15), the limit spring (17) pushes one end of the limit plate (16) into the limit groove (15), and the maintenance of the scraper (10) is completed, and the maintenance of the entire turnover assembled foundation pit drainage device can be completed.

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