Foundation pit dewatering device

Abstract

This invention provides a foundation pit dewatering device, belonging to the field of foundation pit dewatering technology; it includes: a movable body, with a mounting base installed at the top of the movable body, a top plate hinged to the middle of the mounting base, a groove formed at the end of the top plate away from the mounting base, an extension rod slidably connected in the groove, a mounting frame connected to the end of the extension rod away from the top plate, and a winding wheel rotatably connected to the middle of the mounting frame. This foundation pit dewatering device connects the top shell and the metal bottom mesh through connecting ring one and connecting ring two, preventing large foreign objects from entering the pumping components; and by installing a filter screen plate inside the top shell, the filter screen plate filters silt, preventing silt and other small foreign objects from entering the pumping pipe; a motor drives a rotating shaft to rotate, causing the rotating shaft to drive a rotating block and a brush rod to rotate, and the brush rod cleans the filter screen plate, preventing silt and other foreign objects from adhering to the surface of the filter screen plate and affecting pumping efficiency.

Description

Technical Field

[0001] This invention belongs to the field of foundation pit dewatering technology, and specifically relates to a foundation pit dewatering device. Background Technology

[0002] Application No. 202321759401.6 discloses a wellpoint pit dewatering device. By starting a first servo motor, the output end of the first servo motor drives the first threaded rod to rotate, and the first threaded rod drives the moving plate to move, which can drive the water pump, vertical pipe, corrugated pipe, connecting pipe and water pumping pipe to move, so that the water pumping pipe can move to the remaining recessed pit, and the water in the pit can be completely pumped out.

[0003] However, when the device pumps water through the pumping pipe, the pumping pipe opening is easily blocked by foreign objects, affecting the pumping efficiency. Some existing pumping pipes have metal mesh covers at the pipe opening. Although the metal mesh covers can block a large number of foreign objects, sludge will enter the pumping pipe with the water flow. When the sludge adheres to the inner wall of the pumping pipe, it will also cause the pumping pipe to be blocked, making it less practical. Summary of the Invention

[0004] To address the problem of silt easily entering the pumping pipe in the existing technology, this invention provides a foundation pit dewatering device that uses a filter screen combined with a brush rod to prevent silt from entering the pumping pipe. The specific technical solution is as follows: A foundation pit dewatering device includes a movable body, a rotating mechanism mounted on its top end, a mounting base connected to the top end of the rotating mechanism, a top plate hinged to the middle of the mounting base, and a groove formed at the end of the top plate away from the mounting base. An extension rod is slidably connected within the groove, and the extension rod is located away from the top plate. One end of the plate is connected to a mounting bracket, and a winding wheel is rotatably connected to the middle of the mounting bracket. A water suction pipe is wound around the middle of the winding wheel, and a water suction component is connected to the bottom end of the water suction pipe. A filter screen is connected inside the water suction component. The water suction component includes a top shell and a metal bottom mesh. The bottom end of the water suction pipe is connected to the top shell, and the bottom end of the top shell is connected to the metal bottom mesh. A connecting ring one is connected to the outer wall of the top shell, and a connecting ring two is connected to the outer wall of the metal bottom mesh. A locking bolt is connected between the connecting ring one and the connecting ring two.

[0005] Preferably, a water inlet is provided at the center of the top of the top shell, and the water inlet is connected to the water inlet.

[0006] Preferably, a connecting frame is connected to the inner wall of the top shell, the connecting frame is located above the filter screen plate, a motor is installed at the center of the top of the connecting frame, the output end of the motor is connected to a rotating shaft, the bottom end of the rotating shaft extends to the bottom of the filter screen plate, a rotating block is detachably connected to the bottom end of the rotating shaft, and brush rods are connected to the outer walls on both sides of the rotating block, the brush rods are in contact with the filter screen plate.

[0007] Preferably, connecting blocks are connected to both outer walls of the filter screen, and two straight grooves are symmetrically opened on both inner walls of the top shell. The bottom end of the straight groove extends to the bottom end of the top shell, and an arc groove is opened at the top end of the straight groove. The connecting blocks are adapted to both the straight groove and the arc groove.

[0008] Preferably, a waterproof shell is installed at the center of the top of the connecting frame, and the waterproof shell is located on the outside of the motor.

[0009] Preferably, the bottom of the movable body is connected to four bottom wheels, and the top of the movable body is hinged to a hydraulic cylinder one. The output shaft of the hydraulic cylinder one is connected to the top plate, and the top of the top plate is fixedly connected to a hydraulic cylinder two. The output shaft of the hydraulic cylinder two is connected to the extension rod.

[0010] Preferably, an inner groove is provided on one side of the movable body. The rotating mechanism includes: a turntable, a second motor, a first connecting shaft, a first bevel gear, a second connecting shaft, a second bevel gear, a third connecting shaft, a third bevel gear, and a fourth bevel gear. The turntable and the second motor are respectively installed at the top of the movable body. A bearing seat is installed at the bottom of the inner groove. The third connecting shaft is fitted into the center hole of the first bearing seat. The third bevel gear and the fourth bevel gear are respectively fitted into the two ends of the third connecting shaft. The second bevel gear meshes with the top of the third bevel gear, and the first bevel gear meshes with the top of the fourth bevel gear. The first connecting shaft is fitted into the center hole of the first bevel gear and is connected to the turntable. The second connecting shaft is fitted into the center hole of the second bevel gear and is connected to the second motor.

[0011] Preferably, an insert plate is connected to the opening of the inner groove. Two slots are symmetrically formed on the end of the insert plate near the movable body. Two locking blocks are connected to the outer wall of one side of the movable body. Each locking block corresponds to and is adapted to one of the slots. A slot is formed on the end of the insert plate away from the movable body. A sliding groove is formed between the slot and each of the two slots. A baffle is installed at the opening of the slot. A worm gear is rotatably connected within the slot. A knob is rotatably connected to the outer wall of the baffle. The worm gear... The knob is connected, and a bearing seat two is installed on the inner wall of the slot. A double-threaded rod is fitted into the center hole of the bearing seat two. A worm gear is fitted onto the outer wall of the middle part of the double-threaded rod. The worm gear meshes with the worm. A slider is slidably connected in the groove. Two sliders are symmetrically threaded onto the outer wall of the double-threaded rod. Slots are opened at the opposite ends of the two locking blocks. The sliders are adapted to the slots. A limit groove is opened on the inner wall of the groove. A limit block is slidably connected in the limit groove. The limit block is connected to the slider.

[0012] The foundation pit dewatering device of the present invention has the following advantages compared with the prior art:

[0013] 1. The pit dewatering device connects the top shell and the metal bottom mesh through connecting ring one and connecting ring two, so that the metal bottom mesh prevents large foreign objects from entering the pumping components; and by installing a filter screen plate inside the top shell, the filter screen plate filters the silt and prevents silt and other small foreign objects from entering the pumping pipe.

[0014] 2. The motor drives the rotating shaft to rotate, which in turn drives the rotating block and brush rod to rotate. The brush rod cleans the filter screen to prevent silt and other foreign objects from adhering to the surface of the filter screen and affecting the pumping efficiency.

[0015] 3. The bottom wheels facilitate the movement of the entire mobile body, and the extension length and angle of the pumping components can be changed by the cooperation of hydraulic cylinder one and hydraulic cylinder two to adapt to different pumping environments;

[0016] 4. The turntable is driven by motor 2 to rotate, which in turn drives the top plate, winding wheel and pumping components to rotate, thereby changing the pumping position of the pumping components; and by installing a plate at the opening of the inner tank, foreign objects are prevented from entering the inner tank and affecting the transmission of the rotating mechanism. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of the foundation pit dewatering device provided by the present invention;

[0018] Figure 2 A cross-sectional schematic diagram of the pumping component provided by the present invention;

[0019] Figure 3for Figure 2 Enlarged view of point A;

[0020] Figure 4 A bottom sectional view of the top shell provided by the present invention;

[0021] Figure 5 This is a partial cross-sectional schematic diagram of the foundation pit dewatering device provided by the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of point B;

[0023] in, Figures 1 to 6 The reference numerals and component names in the attached drawings are as follows: 1. Moving body, 2. Mounting base, 3. Top plate, 4. Extension rod, 5. Mounting frame, 6. Rewinding wheel, 7. Pumping pipe, 8. Pumping component, 9. Bottom wheel, 10. Hydraulic cylinder one, 11. Hydraulic cylinder two, 12. Pumping port, 13. Connecting frame, 14. Motor one, 15. Waterproof shell, 16. Filter screen, 17. Rotating shaft, 18. Rotating block, 19. Brush rod, 20. Straight groove, 21. Arc groove, 22. Connecting block, 23. Rotating mechanism, 24. Inner groove, 25. Insert plate, 26. Slot, 27. Baffle, 28. Worm gear, 29. 30. Knob, 31. Worm gear, 32. Double threaded rod, 33. Locking block, 34. Slot, 35. Slide groove, 36. Slider, 37. Bearing seat two, 38. Limiting groove, 39. Limiting block, 81. Top shell, 82. Metal bottom mesh, 83. Connecting ring one, 84. Connecting ring two, 85. Locking bolt, 231. Turntable, 232. Motor two, 233. Connecting shaft one, 234. Bevel gear one, 235. Connecting shaft two, 236. Bevel gear two, 237. Bearing seat one, 238. Connecting shaft three, 239. Bevel gear three, 2310. Bevel gear four. Detailed Implementation

[0024] The following describes specific embodiments and appendices. Figures 1-6The present invention will be further described, but the present invention is not limited to these embodiments. The present invention provides a technical solution: a foundation pit dewatering device, comprising: a movable body 1, a rotating mechanism 23 installed at the top of the movable body 1, a mounting base 2 connected to the top of the rotating mechanism 23, a top plate 3 hinged to the middle of the mounting base 2, a sliding groove provided at the end of the top plate 3 away from the mounting base 2, an extension rod 4 slidably connected in the sliding groove, a mounting frame 5 connected at the end of the extension rod 4 away from the top plate 3, a winding wheel 6 rotatably connected to the middle of the mounting frame 5, a drive motor 1 for driving the winding wheel 6 to rotate installed on the outer wall of the mounting frame 5, the drive motor 1 driving the winding wheel 6 to rotate; a pumping pipe 7 wound around the middle of the winding wheel 6, a pumping component 8 connected to the bottom end of the pumping pipe 7, and a pumping component 8 internally connected to... A filter screen 16 is horizontally arranged inside the pumping component 8 to filter small foreign objects such as silt. The pumping component 8 includes a top shell 81 and a metal bottom mesh 82. The bottom end of the pumping pipe 7 is connected to the top shell 81, which is a solid arc-shaped structure. The bottom end of the top shell 81 is connected to the metal bottom mesh 82, which is used to filter large foreign objects. A connecting ring 1 83 is connected to the outer wall of the top shell 81, and a connecting ring 2 84 is connected to the outer wall of the metal bottom mesh 82. A locking bolt 85 is connected between the connecting ring 1 83 and the connecting ring 2 84. Both the connecting ring 1 83 and the connecting ring 2 84 have threaded holes in the vertical direction. The locking bolt 85 fixes the connecting ring 1 83 and the connecting ring 2 84 through the threaded holes.

[0025] As a preferred option, a water inlet 12 is provided at the center of the top of the top shell 81, and the water inlet pipe 7 is connected to the water inlet 12.

[0026] As a preferred option, a connecting frame 13 is further connected to the inner wall of the top housing 81. The connecting frame 13 has a cross-shaped structure and is located above the filter screen plate 16. A motor 14 is installed at the center of the top of the connecting frame 13. The output end of the motor 14 is connected to a rotating shaft 17. The bottom end of the rotating shaft 17 extends to the bottom of the filter screen plate 16. A rotating block 18 is detachably connected to the bottom end of the rotating shaft 17. The detachment method can be either a threaded connection or a bolt locking method. Brush rods 19 are connected to the outer walls on both sides of the rotating block 18. The brush rods 19 are in contact with the filter screen plate 16.

[0027] As a preferred embodiment, the filter screen 16 is further provided with connecting blocks 22 on both outer walls. Two straight grooves 20 are symmetrically formed on both inner walls of the top housing 81. The bottom of the straight grooves 20 extends to the bottom of the top housing 81, and an arc-shaped groove 21 is formed at the top of the straight grooves 20. The connecting blocks 22 are compatible with both the straight grooves 20 and the arc-shaped grooves 21. When installing the filter screen 16, the connecting blocks 22 are inserted into the straight grooves 20 from bottom to top, and then rotated to rotate them into the arc-shaped grooves 21. Then, the metal bottom mesh 82 is installed, blocking the bottom opening of the straight grooves 20, thus completing the installation and fixing of the filter screen 16.

[0028] As a preferred option, a waterproof housing 15 is further installed at the top center of the connecting frame 13. The waterproof housing 15 is located on the outside of the motor 14 and is used to protect the motor 14.

[0029] As a preferred embodiment, the bottom of the movable body 1 is further equipped with four bottom wheels 9 at each of its four corners, and a hydraulic cylinder 10 is hinged to the top of the movable body 1. The output shaft of the hydraulic cylinder 10 is connected to the top plate 3, and the top plate 3 is rotated by the hydraulic cylinder 10 to change the tilt angle of the top plate 3. A hydraulic cylinder 21 is fixedly connected to the top of the top plate 3, and the output shaft of the hydraulic cylinder 211 is connected to the extension rod 4. The extension rod 4 is slid within the top plate 3 by the hydraulic cylinder 211 to change the extension length of the extension rod 4.

[0030] As a preferred embodiment, the movable body 1 is further provided with an inner groove 24 on one side. The rotating mechanism 23 includes: a turntable 231, a second motor 232, a first connecting shaft 233, a first bevel gear 234, a second connecting shaft 235, a second bevel gear 236, a third connecting shaft 238, a third bevel gear 239, and a fourth bevel gear 2310. The turntable 231 and the second motor 232 are respectively installed at the top of the movable body 1. A bearing seat 237 is installed at the inner bottom of the inner groove 24, and the center hole of the bearing seat 237 is fitted with an inner sleeve. The device is equipped with a connecting shaft 238. Both ends of the connecting shaft 238 are fitted with bevel gears 239 and 2310 respectively. The top of bevel gear 239 meshes with bevel gear 236, and the top of bevel gear 2310 meshes with bevel gear 234. The connecting shaft 233 is fitted into the center hole of bevel gear 234 and is connected to turntable 231. The connecting shaft 235 is fitted into the center hole of bevel gear 236 and is connected to motor 232.

[0031] As a preferred embodiment, further, an insert plate 25 is connected to the opening of the inner groove 24. Two slots 34 are symmetrically formed on the end of the insert plate 25 near the moving body 1. Two locking blocks 32 are connected to the outer wall of one side of the moving body 1, with each locking block 32 corresponding to a slot 34 and fitting together. A slot 26 is formed on the end of the insert plate 25 away from the moving body 1. A sliding groove 35 is formed between the slot 26 and each of the two slots 34. A baffle 27 is installed at the opening of the slot 26. A worm gear 28 is rotatably connected inside the slot 26. A knob 29 is rotatably connected to the outer wall of the baffle 27, and the worm gear 28 is connected to the knob 29. A bearing seat 37 is installed on the inner wall of the slot 26. A double-threaded rod 31 is fitted inside the central hole. The threads at both ends of the double-threaded rod 31 are in opposite directions. A worm gear 30 is fitted on the outer wall of the middle part of the double-threaded rod 31. The worm gear 30 meshes with the worm 28. A slider 36 is slidably connected in the sliding groove 35. Two sliders 36 are symmetrically threaded onto the outer wall of the double-threaded rod 31. Slots 33 are opened at the opposite ends of the two locking blocks 32. The sliders 36 are adapted to the slots 33. A limiting groove 38 is opened on the inner wall of the sliding groove 35. A limiting block 39 is slidably connected in the limiting groove 38. The limiting block 39 is connected to the slider 36. The limiting block 39 and the limiting groove 38 are used to limit the movement position of the slider 36 and prevent the slider 36 from rotating with the rotation of the double-threaded rod 31.

[0032] The hydraulic cylinder 1, hydraulic cylinder 2, motor 1, motor 2, filter screen, and metal bottom mesh in this case are existing technologies. Motor 1 and motor 2 have the same structure and connection method as those in the cited documents. The filter screen is used to filter small foreign objects such as silt. As long as the hydraulic cylinder 1, hydraulic cylinder 2, motor 1, motor 2, filter screen, and metal bottom mesh meet the requirements of this case, they are all acceptable. The hydraulic cylinder 1, hydraulic cylinder 2, motor 1, motor 2, filter screen, and metal bottom mesh are not limited to a single model.

[0033] Working principle: All electrical components mentioned in this application are externally connected to a power supply and control switch during use. After installation, first check the installation, fixation, and safety precautions before use. During use, the movable body 1 is moved to the pumping location via the bottom wheel 9. Then, the hydraulic cylinder 10 is adjusted to rotate the top plate 3, changing the initial height of the winding wheel 6. Next, the hydraulic cylinder 11 drives the extension rod 4 to slide within the top plate 3, changing the extension length of the winding wheel 6. The starting motor 232 drives the connecting shaft 235 and bevel gear 236 to rotate. Bevel gear 236 meshes with bevel gear 2310, causing bevel gear 2310 to drive the connecting shaft 238 to rotate. The connecting shaft 238 then drives the bevel gear 239 to rotate, and bevel gear 239 meshes with bevel gear 234. The bevel gear 234 rotates, driving the connecting shaft 233 and the turntable 231 to rotate. The turntable 231 drives the winding wheel 6 to rotate horizontally. After adjustment, the winding wheel 6 is rotated to lower the water pumping pipe 7, and the water pumping component 8 enters the pit to pump water. The water pump is connected to the water pumping pipe 7, and the water in the pit is pumped out through the water pumping port 12. During the pumping process, large foreign objects are blocked by the metal bottom mesh 82. After the silt and small foreign objects enter the metal bottom mesh 82, they are blocked below by the filter screen plate 16 to prevent the silt from entering the top shell 81. During the pumping process, the motor 14 drives the rotating shaft 17 to rotate, which in turn drives the rotating block 18 and the brush rod 19 to rotate. The brush rod 19 cleans the filter screen plate 16 to prevent silt from accumulating on the surface of the filter screen plate 16.

[0034] After the water pumping is complete, the user can remove the locking bolt 85 to separate the top housing 81 from the metal bottom mesh 82. After separation, the rotating block 18 can be removed from the rotating shaft 17. Then, the filter screen plate 16 can be rotated so that the connecting block 22 rotates from the arc groove 21 into the straight groove 20. Then, the filter screen plate 16 can be slid down to remove the connecting block 22 from the straight groove 20. This completes the replacement of the filter screen plate 16, which is quite practical.

[0035] When disassembling the insert plate 25, turn the knob 29 to drive the worm 28 to rotate. The worm 28 meshes with the worm wheel 30 to rotate, which in turn drives the double threaded rod 31 to rotate. This causes the two sliders 36 to slide in the groove 35, disengaging the sliders 36 from the slot 33. Then the insert plate 25 can be removed from the retaining block 32.

[0036] In the description of this invention, the term "a plurality of" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A foundation pit dewatering device, comprising: A mobile body (1) is characterized in that a rotating mechanism (23) is installed at the top of the mobile body (1), a mounting base (2) is connected to the top of the rotating mechanism (23), a top plate (3) is hinged to the middle of the mounting base (2), a sliding groove is provided at the end of the top plate (3) away from the mounting base (2), an extension rod (4) is slidably connected in the sliding groove, a mounting frame (5) is connected to the end of the extension rod (4) away from the top plate (3), a winding wheel (6) is rotatably connected to the middle of the mounting frame (5), a water pumping pipe (7) is wound around the middle of the winding wheel (6), and the water pumping pipe (7) is connected to a water pumping component (8) at its bottom end. The water pumping component (8) is connected to a filter screen (16) inside. The water pumping component (8) includes a top shell (81) and a metal bottom mesh (82). The bottom end of the water pumping pipe (7) is connected to the top shell (81). The bottom end of the top shell (81) is connected to the metal bottom mesh (82). A connecting ring one (83) is connected to the outer wall of the top shell (81). A connecting ring two (84) is connected to the outer wall of the metal bottom mesh (82). A locking bolt (85) is connected between the connecting ring one (83) and the connecting ring two (84). A water inlet (12) is provided at the center of the top of the top shell (81), and the water inlet (7) is connected to the water inlet (12). A connecting frame (13) is connected to the inner wall of the top shell (81). The connecting frame (13) is located above the filter screen plate (16). A motor (14) is installed at the center of the top of the connecting frame (13). The output end of the motor (14) is connected to a rotating shaft (17). The bottom end of the rotating shaft (17) extends to the bottom of the filter screen plate (16). A rotating block (18) is detachably connected to the bottom end of the rotating shaft (17). Brush rods (19) are connected to the outer walls on both sides of the rotating block (18). The brush rods (19) are in contact with the filter screen plate (16). Connecting blocks (22) are connected to both outer walls of the filter screen (16). Two straight grooves (20) are symmetrically opened on both inner walls of the top shell (81). The bottom end of the straight groove (20) extends to the bottom end of the top shell (81). An arc groove (21) is opened at the top end of the straight groove (20). The connecting blocks (22) are adapted to both the straight groove (20) and the arc groove (21). The bottom of the moving body (1) is connected to four corners of the bottom with bottom wheels (9), and the top of the moving body (1) is hinged with a hydraulic cylinder (10). The output shaft of the hydraulic cylinder (10) is connected to the top plate (3). The top of the top plate (3) is fixedly connected with a hydraulic cylinder (11). The output shaft of the hydraulic cylinder (11) is connected to the extension rod (4). The moving body (1) has an inner groove (24) on one side. The rotating mechanism (23) includes: a turntable (231), a second motor (232), a first connecting shaft (233), a first bevel gear (234), a second connecting shaft (235), a second bevel gear (236), a third connecting shaft (238), a third bevel gear (239), and a fourth bevel gear (2310). The top of the moving body (1) is respectively equipped with a turntable (231) and a second motor (232). The inner bottom of the inner groove (24) is equipped with a bearing seat (237). The third connecting shaft (239) is fitted into the center hole of the bearing seat (237). 38), the two ends of the connecting shaft three (238) are respectively fitted with bevel gear three (239) and bevel gear four (2310). The top of the bevel gear three (239) is meshed with bevel gear two (236), and the top of the bevel gear four (2310) is meshed with bevel gear one (234). The connecting shaft one (233) is fitted in the center hole of the bevel gear one (234). The connecting shaft one (233) is connected to the turntable (231). The connecting shaft two (235) is fitted in the center hole of the bevel gear two (236). The connecting shaft two (235) is connected to the motor two (232). The opening of the inner groove (24) is connected to a plate (25). Two slots (34) are symmetrically opened at one end of the plate (25) near the moving body (1). Two blocks (32) are connected to the outer wall of one side of the moving body (1). The blocks (32) correspond one-to-one with the slots (34) and are adapted to each other. A slot (26) is opened at one end of the plate (25) away from the moving body (1). A sliding groove (35) is opened between the slot (26) and the two slots (34). A baffle (27) is installed at the opening of the slot (26). A worm gear (28) is rotatably connected in the slot (26). A knob (29) is rotatably connected on the outer wall of the baffle (27). The worm gear (28) and the knob (29) are connected to each other. 29) Connected, a bearing seat two (37) is installed on the inner wall of the slot (26), a double threaded rod (31) is fitted in the center hole of the bearing seat two (37), a worm wheel (30) is fitted on the middle outer wall of the double threaded rod (31), the worm wheel (30) meshes with the worm (28), a slider (36) is slidably connected in the groove (35), two sliders (36) are symmetrically threaded on the outer wall of the double threaded rod (31), slots (33) are opened at the opposite ends of the two locking blocks (32), the sliders (36) are adapted to the slots (33); a limiting groove (38) is opened on the inner wall of the groove (35), a limiting block (39) is slidably connected in the limiting groove (38), and the limiting block (39) is connected to the slider (36).

2. The foundation pit dewatering device according to claim 1, characterized in that, A waterproof shell (15) is installed at the top center of the connecting frame (13), and the waterproof shell (15) is located on the outside of the motor (14).

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