Foundation pit drainage device for water conservancy and hydropower construction

Abstract

The application relates to the technical field of water conservancy and hydropower construction, in particular to a foundation pit drainage device for water conservancy and hydropower construction, which comprises a water pumping mechanism used for being placed into a water collecting well, the water pumping mechanism comprises a frame and a water submersible pump arranged in the frame, a water pumping pipe is connected to a water outlet end of the water submersible pump, a water group pump is connected to one end of the water pumping pipe away from the water submersible pump, the water group pump comprises a plurality of water pumps, one water submersible pump corresponds to one water pump, the water group pump is used for being installed on the top of a foundation pit, a water inlet end of the water pump is connected to one water pumping pipe, and a water storage mechanism is connected to a water outlet end of the water pump. The application has the effect that water in the foundation pit can directly reach the top of the foundation pit from the water collecting well.

Description

Technical Field

[0001] This application relates to the technical field of water conservancy and hydropower construction, and in particular to a foundation pit drainage device for water conservancy and hydropower construction. Background Technology

[0002] During the construction of water conservancy and hydropower projects, it is usually necessary to excavate foundation pits. If the groundwater level is too high during the excavation of the foundation pit, dewatering should be carried out. The usual dewatering method is to excavate drainage ditches around the foundation pit and set up a collection well at the bottom of the ditch. The water in the drainage ditch is collected in the collection well and pumped out of the foundation pit by a water pump.

[0003] A drainage device for water conservancy and hydropower construction is disclosed in the related technology, including a drainage pump, a connecting pipe, a straight pipe, and a horizontal plate. The connecting pipe is fixedly installed at the inlet of the drainage pump, the straight pipe is slidably installed inside the connecting pipe, one end of the straight pipe extends outside the connecting pipe, and the horizontal plate is fixedly installed inside the straight pipe. A filter screen is installed inside the straight pipe. In use, the water delivery pipe is fixedly installed at the outlet of the drainage pump through an external flange, the drainage pump is placed at the location of the accumulated water, and the drainage pump is started, so that the drainage pump can pump out the accumulated water. At the same time, the filter screen can filter out the garbage in the accumulated water, reducing damage to the drainage pump.

[0004] However, when the above structure is used for drainage operations in foundation pits during water conservancy and hydropower construction, the head of a single drainage pump cannot meet the drainage height requirements due to the large drainage volume and depth of the foundation pit. Therefore, a transfer pit is used in the middle of the foundation pit to drain the water inside the foundation pit to the outside of the foundation pit. Summary of the Invention

[0005] In order to enable water in the foundation pit to reach the top of the foundation pit directly from the sump, this application provides a foundation pit drainage device for water conservancy and hydropower construction.

[0006] This application provides a foundation pit drainage device for water conservancy and hydropower construction, which adopts the following technical solution:

[0007] A drainage device for foundation pits in water conservancy and hydropower construction includes a pumping mechanism for placement in a sump. The pumping mechanism includes a frame and a submersible pump installed within the frame. The outlet end of the submersible pump is connected to a pumping pipe, and the end of the pumping pipe away from the submersible pump is connected to a water pump group. The water pump group includes multiple water pumps, with one submersible pump corresponding to one water pump. The water pump group is used to install on the top of the foundation pit. The inlet end of each water pump is connected to a pumping pipe, and the outlet end of each water pump is connected to a water storage mechanism.

[0008] By adopting the above technical solution, during use, the frame of the pumping mechanism is placed in the sump, and the submersible pump is located inside the frame, enabling the submersible pump to draw water from the frame and discharge it upward through the pumping pipe connected to the sewage pump. At the same time, the end of the pumping pipe away from the submersible pump is connected to one of the pumps in the water pump group, so that one submersible pump and one pump work together to transport water in the pumping pipe, which can meet the drainage needs of foundation pits with a depth of 20-30m. The pump is installed at the top of the foundation pit, so that the water in the foundation pit can directly reach the top of the foundation pit from the sump and enter the water storage mechanism.

[0009] Preferably, the frame includes a base plate and frame plates, with multiple frame plates arranged along the edge of the base plate, a submersible pump fixed on the base plate, an air column at the connection between two adjacent frame plates, a filter screen inside the frame plates, and a counterweight fixed on the base plate.

[0010] By adopting the above technical solution, the base plate and frame plate form a frame, and a filter screen is installed inside the frame plate. The frame passes through the filter screen on the frame plate to perform preliminary filtration of water. At the same time, the air column is used to generate buoyancy in the water collection well. Then, the counterweight blocks place the frame in the middle position of the water collection well, reducing the amount of mud and sand sucked up by the submersible pump. Meanwhile, the frame plate and filter screen can protect the inner wall of the water collection well.

[0011] Preferably, a top plate is fixedly installed on the frame at the upper end of the air column, a support ear is fixedly connected to the top plate, a rotating shaft is rotatably installed on the support ear, and the axis of the rotating shaft is horizontally set. A lifting ring for connecting a steel wire rope is installed on the rotating shaft.

[0012] By adopting the above technical solution, the top plate is connected to the frame, and the top plate is fixed with support ears. The support ears are rotatably connected to the pivot, and the lifting ears are fixed on the pivot. When the wire rope is connected to the lifting ring, the frame can be easily suspended.

[0013] Preferably, the water storage mechanism includes a water storage tank, one side of which is connected to the outlet of a water pump. A collection hopper is fixedly installed at the bottom of the water storage tank, and a collection pipe is fixedly connected to the bottom of the collection hopper. A storage pipe is connected to the lower end of the collection pipe, and a sludge pumping pipe for connecting a mud pump is fixedly connected to one end of the storage pipe. A grid plate for separating the water storage tank and the collection hopper is provided at the bottom of the water storage tank.

[0014] By adopting the above technical solution, a fixed collection hopper is installed at the bottom of the reservoir. The silt and sand contained in the water pumped into the reservoir will settle from the grid plate into the collection hopper, and then enter the storage pipe under the action of the collection pipe. Then, it will be pumped out from the sludge pumping pipe through the sludge pump, which facilitates the cleaning of the inside of the reservoir.

[0015] Preferably, the water storage tank is provided with a U-shaped water collection pipe inside, the U-shaped water collection pipe is arranged along the inner wall of the water storage tank, and a filter sponge is provided on the side wall of the U-shaped water collection pipe. Water in the water storage tank enters the U-shaped water collection pipe through the filter sponge. The U-shaped water collection pipe is connected to a drain pipe.

[0016] By adopting the above technical solution, filter sponges are installed on the side wall of the U-shaped water collection pipe. The water in the water storage tank is filtered by the filter sponges and then enters the U-shaped water collection pipe, and is discharged through the drain pipe, thereby enabling the water collected in the water storage tank to be utilized.

[0017] Preferably, a partition is provided at the corner of the water storage tank, and the partition, together with the interior of the water storage tank, forms a clear water cavity. The clear water cavity is connected to a U-shaped water collection pipe. The bottom of the clear water cavity is sealed, and a partition plate is provided inside the clear water cavity. One end of the drain pipe is inserted into the clear water cavity.

[0018] By adopting the above technical solution, the clear water chamber is connected to the U-shaped water collection pipe, so that the water filtered by the filter sponge enters the clear water chamber and is discharged through the drain pipe. The bottom of the clear water chamber is sealed, thereby reducing the amount of mud and sand in the collection hopper entering the clear water chamber. The partition plate allows the end of the drain pipe to be in the middle of the clear water chamber.

[0019] Preferably, a protective box is provided on the outside of the water pump, and multiple water pumps are located inside the protective box. A protective cover is provided on the top of the protective box.

[0020] By adopting the above technical solution, a protective box is installed on the outside of the water pump, which can protect the water pump inside and reduce the damage to the water pump caused by rainfall.

[0021] Preferably, a sealing plate is provided on the outer side of the frame corresponding to the position of each filter screen. The sealing plate cooperates with the frame plate to open or close the filter screen. Multiple guide rods are provided on the sealing plate. The guide rods are slidably connected to the filter screen and extend into the interior of the frame. A drive mechanism for moving the sealing plate is connected to the sealing plate.

[0022] By adopting the above technical solution, the sealing plate and the frame plate open or close the filter screen. When the sealing plate is fitted into the frame plate, it blocks the filter screen, thereby preventing water in the collection well from entering the frame. When there is less water in the collection well, the filter screen can be closed to reduce the amount of mud and sand at the bottom of the collection well entering the frame and causing damage to the submersible pump.

[0023] Preferably, the drive mechanism includes a rotating shaft, a connecting rod, and a connecting frame. The rotating shaft is vertically arranged and rotatably mounted within the frame. The connecting frame is fixed to a guide rod. A turntable is coaxially fixed on the rotating shaft. One end of the connecting rod is rotatably connected to the turntable, and the other end is rotatably connected to the connecting frame. Each connecting rod corresponds to a sealing plate. A driven bevel gear is coaxially fixed on the rotating shaft, and a driving bevel gear is coaxially fixed on the rotating shaft. The driven bevel gear meshes with the driving bevel gear. A torsion spring for driving the rotating shaft to rotate is installed on the rotating shaft, and the elastic force of the torsion spring is used to drive the sealing plate to move in the direction of opening the filter screen.

[0024] By adopting the above technical solution, when the water level in the collection well gradually decreases, the lifting ring rotates upward, causing the active bevel gear on the rotating shaft to drive the driven bevel gear on the rotating shaft to rotate. This allows the turntable to simultaneously close multiple sealing plates on the filter screen, thereby preventing sediment from entering the frame when the water level in the collection well is low. When the water level in the collection well rises, the frame also rises, reducing the force on the lifting ring. The torsion spring then automatically opens the multiple sealing plates, moving them in the direction of air filtration.

[0025] Preferably, the rotating shaft is provided with a hysteresis mechanism, which includes a pin and a spring. The pin is slidably connected to the support ear, with one end of the pin facing the side wall of the rotating shaft. The side wall of the rotating shaft has two triangular notches that mate with the ends of the pin. The spring is sleeved on the pin, with one end of the spring abutting against the pin and the other end abutting against the support ear.

[0026] By adopting the above technical solution, the end of the pin engages with the notch on the side wall of the rotating shaft. When the water level in the collection well drops significantly, the pin will disengage from one notch. At the same time, when the water level in the collection well rises, the torsion spring will drive the rotating shaft to rotate and return from one notch to another once the water level in the collection well is sufficient to float the frame. This reduces the frequency of the sealing plate opening or closing the filter screen.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The end of the water pump pipe away from the submersible pump is connected to one of the pumps in the water pump group, so that one submersible pump and one pump work together to transport water in the water pump pipe. The pump is installed at the top of the pit, so that the water in the pit can reach the top of the pit directly from the sump.

[0029] 2. The air column is used to generate buoyancy in the water collection well, and the counterweight blocks place the frame in the middle of the water collection well, reducing the amount of silt sucked up by the submersible pump. At the same time, the frame plate and filter screen can protect the inner wall of the water collection well.

[0030] 3. Water in the reservoir is filtered by a filter sponge and then enters a loop-shaped water collection pipe, before being discharged through a drain pipe, thus enabling the use of the water collected in the reservoir. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0032] Figure 2 This is a schematic diagram of the overall structure of the pumping mechanism in Embodiment 1 of this application. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the overall structure of the pumping mechanism in Embodiment 1 of this application. Figure 2 ;

[0034] Figure 4 This is a schematic diagram of the water storage mechanism in Embodiment 1 of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the partition plate cut open in Embodiment 1 of this application;

[0036] Figure 6 This is a schematic diagram of the installation of the water pump in Embodiment 1 of this application;

[0037] Figure 7 This is a schematic diagram of the pumping mechanism in Embodiment 2 of this application;

[0038] Figure 8 This is a schematic diagram of the connection structure of the drive mechanism in Embodiment 2 of this application;

[0039] Figure 9 yes Figure 7 A magnified structural diagram of part A in the middle.

[0040] Explanation of reference numerals in the attached drawings: 1. Water storage mechanism; 11. Water storage tank; 12. Manifold; 13. Collection hopper; 14. Converging pipe; 15. Accumulation pipe; 16. Sludge pumping pipe; 17. Grid plate; 18. U-shaped water collection pipe; 181. Filter sponge; 19. Partition plate; 191. Clear water chamber; 192. Partition plate; 2. Water pump; 21. Water pump; 22. Outlet pipe; 23. Protective box; 24. Distribution box; 25. Protective cover; 3. Pumping mechanism; 31. Frame; 311. Base plate; 312. Frame plate; 313. Filter screen 314. Air column; 315. Leg; 316. Counterweight; 32. Submersible pump; 33. Curved plate; 34. Top plate; 35. Support lug; 36. Rotating shaft; 37. Lifting ring; 38. Connecting pipe; 4. Pumping pipe; 5. Draining pipe; 6. Sealing plate; 61. Guide rod; 7. Drive mechanism; 71. Rotating shaft; 72. Connecting rod; 73. Connecting frame; 74. Turntable; 75. Driving bevel gear; 76. Driven bevel gear; 77. Torsion spring; 8. Hysteresis mechanism; 81. Pin; 82. Spring; 83. Notch. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0042] This application discloses a foundation pit drainage device for water conservancy and hydropower construction.

[0043] Example 1:

[0044] This embodiment discloses a foundation pit drainage device for water conservancy and hydropower construction, referencing... Figure 1 The system includes a water storage mechanism 1, a water pump 2, and a pumping mechanism 3. The water pump 2 needs to be pre-installed on the top of the foundation pit. The water storage mechanism 1 is located outside the foundation pit to store water pumped out from inside the pit. The pumping mechanism 3 is located inside the foundation pit and in a sump well inside the pit, allowing the pumping mechanism 3 to pump water from the sump well. A pumping pipe 4 is installed between the pumping mechanism 3 and the water pump 2. One end of the pumping pipe 4 is connected to the pumping mechanism 3, and the other end is connected to the water pump 2. Through the cooperation of the pumping mechanism 3 and the water pump 2, the water in the sump well is directly placed into the water storage mechanism 1 located outside the foundation pit, making it easier to drain the water from the foundation pit.

[0045] refer to Figure 2 and Figure 3The pumping mechanism 3 includes a frame 31 and a submersible pump 32. The frame 31 includes a base plate 311 and frame plates 312. The frame plates 312 are arranged circumferentially at the edge of the top surface of the base plate 311 and are fixedly connected to the base plate 311. A filter screen 313 is fixedly connected to the inner wall of each frame plate 312. An air column 314 is provided at the junction of two adjacent frame plates 312. The air column 314 is a hollow structure used to provide buoyancy. The side of the air column 314 away from the center of the frame 31 extends beyond the outer surface of the frame plate 312. The frame 31 is used to place in the water collection well. The arrangement of the air column 314 allows the outer surface of the frame plate 312 to be spaced apart from the inner surface of the water collection well. At the same time, the air column 314 can provide buoyancy for the frame 31, keeping the frame 31 in the middle of the water in the water collection well and reducing the risk of the frame 31 falling to the bottom of the water collection well. A bracket 315 is provided on the upper surface of the base plate 311. The submersible pump 32 is fixedly connected to the bracket 315. A filter screen 313 can also be fixedly installed on the inner or outer wall of the base plate 311. A counterweight block 316 is fixedly connected to the middle of the bottom of the filter screen 313 on the base plate 311. The counterweight block 316 is used to adjust the depth of the frame 31 submerged in water, thereby reducing the amount of mud and sand sucked in by the submersible pump 32. Two arc-shaped plates 33 are installed on the frame 31. Each arc-shaped plate 33 is fixedly connected to the top of two adjacent air columns 314 at both ends. A top plate 34 is fixedly connected between the shaped plates 33. A support lug 35 is also fixedly connected to the top of the top plate 34. A rotating shaft 36 is vertically rotatably mounted on the support lug 35. A lifting ring 37 is fixedly mounted on the rotating shaft 36. A steel wire rope is connected to the lifting ring 37. The steel wire rope is used to control the minimum height of the frame 31 and maintain the connection to the frame 31. A connecting pipe 38 is fixedly connected to the outlet of the submersible pump 32. The end of the connecting pipe 38 away from the submersible pump 32 is fixedly connected to the pumping pipe 4. Water is pumped from the submersible pump 32 into the pumping pipe 4 through the connecting pipe 38. The submersible pump 32, together with the water pump 2, can meet the drainage needs of foundation pits with a depth of 20-30m, and has a wider range of applications.

[0046] When in use, a water storage tank can be pre-excavated on one side of the top of the foundation pit, and the water storage mechanism 1 can be placed in the water storage tank. The number of pumping mechanisms 3 is determined according to the number of water collection wells inside the foundation pit. One pumping mechanism 3 is installed in each water collection well. At the same time, the size of the frame 31 can be equal to the size of the water collection well. After the pumping mechanism 3 is placed in the water collection well, the filter screen 313 set between the air columns 314 can filter the pumped water and also protect the well wall of the water inlet well, thereby reducing the collapse of the inner wall of the water collection well at the pumping part.

[0047] refer to Figure 4 and Figure 5The water storage mechanism 1 includes a water storage tank 11. A collecting pipe 12, which communicates with the interior of the water storage tank 11, is fixedly connected to one side of the top of the water storage tank 11. One end of the collecting pipe 12 is connected to a water pump 2, which pumps water into the collecting pipe 12 and into the water storage tank 11. A collecting hopper 13 is fixedly connected to the bottom of the water storage tank 11. The upper end of the collecting hopper 13 is larger than the lower end. The upper end of the collecting hopper 13 is connected to the water storage tank 11, and the lower end of the collecting hopper 13 is fixedly connected to a collecting pipe 14. A sludge collection pipe 15 is fixedly connected to the bottom of the collecting pipe 14, and one end of the sludge collection pipe 15 is fixedly connected to a sludge pumping pipe 16. The bottom of the water storage tank 11 is provided with a grid plate 17, which is used to separate the water storage tank 11 and the collecting hopper 13, so that the sludge entering the collecting hopper 13 is less disturbed by the water flow in the water storage tank 11. The water storage tank 11 is equipped with a U-shaped water collection pipe 18, which is located above the grid plate 17 and arranged along the inner wall of the water storage tank 11. A filter sponge 181 is installed on the side wall of the U-shaped water collection pipe 18. The filter sponge 181 can filter the water in the water storage tank 11 before it enters the U-shaped water collection pipe 18. A partition plate 19 is fixedly connected at one corner of the water storage tank 11. The partition plate 19 and the inner wall of the water storage tank 11 form a clear water cavity 191. The bottom of the clear water cavity 191 is sealed to reduce the amount of muddy water below the grid plate 17 entering the drain pipe 5. At the same time, a partition plate 192 is fixedly installed at the bottom of the clear water cavity 191. A drain pipe 5 is installed inside the clear water cavity 191. The water in the clear water cavity 191 is pumped out of the water storage tank 11 through the drain pipe 5. The partition plate 192 can prevent the drain pipe 5 from contacting the bottom of the clear water cavity 191.

[0048] During construction, water is needed to recycle and reuse the water in the foundation pit. Since the water pumped out of the foundation pit contains a lot of silt, it needs to be settled for 8-10 hours after being transported into the water storage tank 11 before it can be used. During the settling process, the silt will pass through the grid plate 17 to the bottom of the collection hopper 13 and finally converge into the storage pipe 15. The silt can be pumped out by the mud pump connected to the mud pumping pipe 16. There is still a small amount of silt above the grid plate 17. The water is then filtered through the filter sponge 181 into the loop water collection pipe 18, and then enters the clear water chamber 191 from the loop water collection pipe 18. It can be transported and used through the drain pipe 5.

[0049] refer to Figure 6The water pump group 2 includes multiple water pumps 21. Each water pump 21 has an inlet end corresponding to a pumping pipe 4, and each water pump 21 has an outlet end connected to an outlet pipe 22. The outlet pipes 22 of the multiple water pumps 21 are all connected to a manifold 12, so that the water pumped by the water pumps 21 enters the water storage tank 11 through the outlet pipes 22 and the manifold 12. A protective box 23 is set on the outside of the multiple water pumps 21. A power distribution box 24 is also set on the outer wall of one end of the protective box 23. A protective cover 25 is set on the top of the protective box 23, so that the multiple water pumps 21 can be protected by the protective box 23. In use, the number of water pumps 21 in the water pump group 2 needs to be set according to the needs of use. Generally, there are no fewer than four sets. Three-phase power is used for power supply. The power distribution box 24 can meet the power supply needs of the water pump group 2 and the pumping mechanism 3.

[0050] Example 2:

[0051] This embodiment discloses a foundation pit drainage device for water conservancy and hydropower construction, referencing... Figure 7 and Figure 8 The difference from Embodiment 1 is that the base plate 311 is a closed structure. A sealing plate 6 is provided on the outside of the frame 31 corresponding to the position of each filter screen 313. The sealing plate 6 cooperates with the frame plate 312 to block the filter screen 313, thus interrupting the process of water entering the inside of the filter screen 313 from the collection well. A guide rod 61 is fixedly provided on the sealing plate 6. The guide rod 61 is perpendicular to the filter screen 313 and is slidably connected to the filter screen 313. Multiple guide rods 61 are fixed on each sealing plate 6. A driving mechanism 7 is provided inside the frame 31. The driving mechanism 7 is connected to the sealing plate 6 to open or close the sealing plate 6 on the outside of the frame plate 312, so as to achieve the open or closed state of the filter screen 313.

[0052] refer to Figure 7 and Figure 8 The drive mechanism 7 includes a rotating shaft 71, a connecting rod 72, and a connecting frame 73. The connecting frame 73 is used to fix the guide rod 61 to one end inside the frame 31. The rotating shaft 71 is vertically arranged inside the frame 31 and rotatably connected to the frame 31. A turntable 74 is coaxially fixed on the rotating shaft 71. The connecting rod 72 is connected between the turntable 74 and the connecting frame 73. One end of the connecting rod 72 is rotatably connected to the connecting frame 73, and the other end is rotatably connected to the turntable 74, so that when the turntable 74 rotates, multiple connecting rods 72 can move multiple sealing plates 6 simultaneously.

[0053] refer to Figure 7A driving bevel gear 75 is coaxially fixed on the rotating shaft 36, and a driven bevel gear 76 is coaxially fixed on the upper end of the rotating shaft 71. The driving bevel gear 75 meshes with the driven bevel gear 76. A torsion spring 77 is sleeved on the rotating shaft 71, with one end fixed to the driven bevel gear 76 and the other end fixed to the top plate 34. The force of the torsion spring 77 can drive the rotating shaft 71 to rotate, and the direction in which the torsion spring 77 drives the rotating shaft 71 to rotate is the direction in which the turntable 74 drives the sealing plate 6 to open the filter screen 313. When the lifting ring 37 fixedly installed on the rotating shaft 36 rotates upward, it can drive the rotating shaft 71 in the direction of increasing elastic force of the torsion spring 77. In use, the pumping pipe 4 is flexible and works in conjunction with the air column 314. Because the air column 314 allows the frame 31 to float within the collection well, as the water level in the collection well drops, the frame 31 also descends. If the frame 31 reaches the bottom of the collection well, a large amount of sediment can easily enter the frame 31, thus reducing the lifespan of the submersible pump 32. Therefore, a steel wire rope is connected to the lifting ring 37 to limit the lowest downward movement of the frame 31. When the frame 31 moves downward as the water level in the collection well decreases, the steel wire rope tightens and pulls the frame 31. The weight of the frame 31 then causes the lifting ring 37 to rotate the shaft 36, moving the sealing plate 6 towards the direction of the closed filter screen 313. This stops water from entering the frame 31 from the collection well, stopping the submersible pump 32 from pumping water. Simultaneously, water continues to collect in the collection well, allowing the frame 31 to move upward.

[0054] refer to Figure 9A hysteresis mechanism 8 is provided at one end of the rotating shaft 36. The hysteresis mechanism 8 includes a pin 81 and a spring 82. The pin 81 is slidably connected to the support ear 35, and the end of the pin 81 faces the side wall of the rotating shaft 36. An isosceles triangle is formed at the end of the pin 81. Two notches 83 are opened on the side wall of the rotating shaft 36. The shape of the two notches 83 matches the end of the pin 81. The angle of the two notches 83 is the maximum angle of rotation of the rotating shaft 36. When the end of the pin 81 is inserted into the two notches 83, it corresponds to the position of the sealing plate 6 in the open or closed filter screen 313 respectively. The spring 82 is sleeved on the pin 81. One end of the spring 82 abuts against the pin 81, and the other end abuts against the support ear 35, so that the force of the spring 82 is used to drive the pin 81 to move in the direction of the notch 83. In operation, as the water level in the collection well gradually decreases, the buoyancy of the frame 31 gradually decreases, leading to a gradual increase in the force on the wire rope. This drives the rotating shaft 36, allowing the pin 81 to quickly move from one notch 83 to another, enabling the sealing plate 6 to close the filter screen 313 in a timely manner. Conversely, as the water level in the collection well increases, the buoyancy of the frame 31 gradually increases until it equals the weight of the frame 31. Only then will the pin 81 actuate, opening the sealing plate 6 and allowing water to enter the frame 31. This hysteresis mechanism 8 reduces the frequency of water intake and stop actions. A sensor can be installed on the rotating shaft 36 to detect its rotational position, and the position of the shaft 36 controls the start and stop of the submersible pump 32 and the water pump 21, enabling timely pumping of water from the collection well.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foundation pit drainage device for water conservancy and hydropower construction, characterized in that: The system includes a pumping mechanism (3) for placement in a sump. The pumping mechanism (3) includes a frame (31) and a submersible pump (32) disposed within the frame (31). The outlet end of the submersible pump (32) is connected to a pumping pipe (4). The end of the pumping pipe (4) away from the submersible pump (32) is connected to a water pump group (2). The water pump group (2) includes multiple water pumps (21), with one submersible pump (32) corresponding to one water pump (21). The water pump group (2) is used to be installed on the top of the pit. The inlet end of the water pump (21) is connected to a pumping pipe (4). The outlet end of the water pump (21) is connected to a water storage mechanism (1). The frame (31) includes a base plate (311) and a frame plate (312). Multiple frame plates (312) are arranged along the edge of the base plate (311). A submersible pump (32) is fixed on the base plate (311). An air column (314) is provided at the connection between two adjacent frame plates (312). A filter screen (313) is provided inside the frame plate (312). A counterweight (316) is fixed on the base plate (311). A top plate (34) is fixedly installed on the frame (31) at the upper end of the air column (314). A support ear (35) is fixedly connected to the top plate (34). A rotating shaft (36) is rotatably installed on the support ear (35), and the axis of the rotating shaft (36) is set horizontally. A lifting ring (37) for connecting a steel wire rope is installed on the rotating shaft (36). A sealing plate (6) is provided on the outer side of the frame (31) corresponding to the position of each filter screen (313). The sealing plate (6) cooperates with the frame plate (312) to open or close the filter screen (313). Multiple guide rods (61) are provided on the sealing plate (6). The guide rods (61) are slidably connected to the filter screen (313) and extend into the interior of the frame (31). A drive mechanism (7) for moving the sealing plate (6) is connected to the sealing plate (6). The drive mechanism (7) includes a rotating shaft (71), a connecting rod (72), and a connecting frame (73). The rotating shaft (71) is vertically arranged and rotatably mounted inside the frame (31). The connecting frame (73) is fixed to the guide rod (61). A turntable (74) is coaxially fixed on the rotating shaft (71). One end of the connecting rod (72) is rotatably connected to the turntable (74), and the other end is rotatably connected to the connecting frame (73). Furthermore, one connecting rod (72) is connected to one... For each sealing plate (6), a driven bevel gear (76) is coaxially fixedly connected to the rotating shaft (71), and a driving bevel gear (75) is coaxially fixedly connected to the rotating shaft (36). The driven bevel gear (76) meshes with the driving bevel gear (75), and a torsion spring (77) for driving the rotating shaft (71) to rotate is installed on the rotating shaft (71). The elastic force of the torsion spring (77) is used to drive the sealing plate (6) to move in the direction of opening the filter screen (313). The rotating shaft (36) is provided with a hysteresis mechanism (8), which includes a pin (81) and a spring (82). The pin (81) is slidably connected to the support ear (35). One end of the pin (81) faces the side wall of the rotating shaft (36). Two triangular notches (83) are provided on the side wall of the rotating shaft (36) to cooperate with the end of the pin (81). The spring (82) is sleeved on the pin (81), and one end of the spring (82) abuts against the pin (81) and the other end abuts against the support ear (35).

2. The foundation pit drainage device for water conservancy and hydropower construction according to claim 1, characterized in that: The water storage mechanism (1) includes a water storage tank (11), one side of which is connected to the outlet of a water pump (21). A collection hopper (13) is fixedly installed at the bottom of the water storage tank (11), and a collection pipe (14) is fixedly connected to the bottom of the collection hopper (13). A storage pipe (15) is connected to the lower end of the collection pipe (14), and a mud pumping pipe (16) for connecting a mud pump is fixedly connected to one end of the storage pipe (15). A grid plate (17) for separating the water storage tank (11) and the collection hopper (13) is provided at the bottom of the water storage tank (11).

3. A foundation pit drainage device for water conservancy and hydropower construction according to claim 2, characterized in that: The water storage tank (11) is equipped with a loop-shaped water collection pipe (18) inside. The loop-shaped water collection pipe (18) is arranged along the inner wall of the water storage tank (11), and a filter sponge (181) is arranged on the side wall of the loop-shaped water collection pipe (18). Water in the water storage tank (11) enters the loop-shaped water collection pipe (18) through the filter sponge (181). The loop-shaped water collection pipe (18) is connected to a drain pipe (5).

4. A foundation pit drainage device for water conservancy and hydropower construction according to claim 3, characterized in that: A partition (19) is provided at the corner of the water storage tank (11). The partition (19) and the interior of the water storage tank (11) form a clear water cavity (191). The clear water cavity (191) is connected to the U-shaped water collection pipe (18). The bottom of the clear water cavity (191) is sealed, and a partition plate (192) is provided inside the clear water cavity (191). One end of the drain pipe (5) is inserted into the clear water cavity (191).

5. A foundation pit drainage device for water conservancy and hydropower construction according to claim 1, characterized in that: A protective box (23) is provided on the outside of the water pump (21), and multiple water pumps (21) are located inside the protective box (23). A protective cover (25) is provided on the top of the protective box (23).

Images