Water conservancy and hydropower construction drainage structure and method

Abstract

The invention discloses a water drainage structure and method for water conservancy and hydropower construction, and relates to the technical field of water conservancy and hydropower construction. The water drainage structure comprises a cart, a water pump used for pumping water and a buffer box used for secondary filtering are arranged in the cart, and a hose is arranged at the input end of the buffer box; a filtering mechanism used for preliminary filtering is arranged at one end of the hose and comprises a filtering box, a water inlet pipe, an impurity discharging box and a water discharging pipe are fixedly connected to the interior of the outer surface of the filtering box, a filtering plate is fixedly connected to the interior of the filtering box, and a first rotating shaft is rotationally connected to the interior of the filtering box; the outer surface of the first rotating shaft is sleeved with a first impeller. Water in a foundation pit is driven by the water pump to enter the filter box, the filter plate filters the water entering the filter box, the impeller I and the multiple brushes are driven to rotate when the water flows into the filter box, the brushes clean impurities filtered on the surface of the filter plate, and the impurities are prevented from blocking the filter plate and affecting the drainage efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy and hydropower construction, and in particular to a water conservancy and hydropower construction drainage structure and method. Background Art

[0002] During the construction of water conservancy and hydropower projects, it is usually necessary to excavate a foundation pit. The foundation pit is a soil pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. During the excavation of the foundation pit, if the groundwater is high, dewatering should be carried out to avoid hindering the construction workers and reduce safety hazards.

[0003] Most of the existing drainage structures for water conservancy and hydropower construction use a filter cover connected to one end of the water pump suction pipe. The filter cover filters the water pumped out by the water pump to avoid blockage of the suction pipe and damage to the water pump. However, during the use of the existing foundation pit drainage structure, the filter cover is easily blocked by impurities in the water. The operator needs to repeatedly pull out the filter cover and clean it, which increases the operator's workload and affects the drainage efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a water conservancy and hydropower construction drainage structure and method to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A drainage structure for water conservancy and hydropower construction, comprising a cart, wherein a water pump for pumping water and a buffer tank for secondary filtration are provided inside the cart, a hose is provided at the input end of the buffer tank, and a filtering mechanism for primary filtration is provided at one end of the hose; The filtering mechanism includes a filter box, the outer surface of which is fixedly connected to an inlet pipe, a discharge box and a drain pipe, the filter box is fixedly connected to a filter plate, the filter box is rotatably connected to a rotating shaft 1, the outer surface of the rotating shaft 1 is sleeved with an impeller 1, the outer end of the impeller 1 is fixedly connected to a brush in a circumferential array, and the outer end of the brush is in contact with the filter plate; The interior of the impurity discharge box is rotatably connected to a second rotating shaft, and the outer surface of the second rotating shaft is sleeved with a second impeller; The drain pipe is fixedly connected to the hose.

[0006] A further improvement of the technical solution of the present invention is that: the sides of the filter box and the impurity discharge box are fixedly connected to a gear box, one end of the first rotating shaft passes through the sides of the filter box and the gear box and is fixedly connected to the first gear, and one end of the second rotating shaft passes through the sides of the impurity discharge box and the gear box and is fixedly connected to the second gear; The gear 1 and the gear 2 are both located inside the gear box, and the outer ring surfaces of the gear 1 and the gear 2 are movably connected with a chain.

[0007] A further improvement of the technical solution of the present invention is that a rope ring is fixedly connected to the outer surface of the filter box, and the rope ring is connected to the rope.

[0008] A further improvement of the technical solution of the present invention is that: the interior of the buffer box is fixedly connected with support frame 1 and support frame 2, and the support frame 1 and support frame 2 are concentrically arranged. The outer surfaces of the support frame 1 and support frame 2 are movably connected with filter cylinder 1 and filter cylinder 2. The top surface of the support frame 1 is threadedly connected to the box cover, and the top surface of the box cover is rotatably connected to a connecting pipe, and one end of the connecting pipe is threadedly connected to the input end of the water pump.

[0009] A further improvement of the technical solution of the present invention is that: an annular groove is provided on the inner bottom surface of the support frame 1, and the number of the annular grooves is two, and the two annular grooves are respectively clamped to the filter cylinder 1 and the filter cylinder 2.

[0010] A further improvement of the technical solution of the present invention is that: an annular plate is fixedly connected to the bottom surface of the box cover, and the number of the annular plates is two, and the two annular plates are movably connected to the support frame 1 and the support frame 2 respectively.

[0011] A further improvement of the technical solution of the present invention is that a curved pipe and a porthole are fixedly connected to the inner portion of the outer surface of the support frame 1, and the curved pipe is fixedly connected to the hose.

[0012] A method for constructing a drainage structure for water conservancy and hydropower construction comprises the following steps: S1: Push the cart to drive the drainage structure to the working position. Select a hose of appropriate length according to the depth of the foundation pit, connect the hose to the buffer box and the filter mechanism respectively, connect the rope to the rope ring, lower the filter box into the foundation pit through the rope, start the water pump, and the water in the foundation pit enters the filter box through the water inlet pipe. The filter plate performs primary filtration on the water entering the filter box. The water after primary filtration enters the buffer box through the hose. The buffer box performs secondary filtration on the water, thereby reducing the impurity content in the water and preventing the impurities in the water from interfering with the operation of the water pump. The water after secondary filtration is discharged through the water pump, thereby draining the water in the foundation pit; S2: When the water in the foundation pit enters the filter box, the water flow drives the impeller and multiple brushes to rotate. The multiple brushes rotate to clean the impurities filtered on the surface of the filter plate to prevent the impurities filtered by the filter plate from clogging the filter holes on the filter plate. When the brushes rotate, the cleaned impurities are driven into the impurity discharge box, and the impurities are discharged from the filter box through the impurity discharge box; S3: When impeller 1 rotates, it drives gear 1 to rotate through shaft 1. Gear 1 drives impeller 2 to rotate through chain, gear 2 and shaft 2. The rotation of impeller 2 can discharge water in the impurity discharge box, thereby accelerating the discharge rate of impurities. S4: When water flows into the buffer tank through the hose, filter cartridge 1 and filter cartridge 2 filter the water entering the buffer tank, thereby further reducing the impurity content in the water. The water filtered by filter cartridge 1 and filter cartridge 2 is discharged from the buffer tank through the connecting pipe and enters the water pump. The output end of the water pump discharges the water, thereby discharging the water in the foundation pit.

[0013] Due to the adoption of the above technical solution, the present invention has the following technical advancements compared to the prior art: 1. The present invention provides a drainage structure for water conservancy and hydropower construction. When a water pump drives water in a foundation pit into a filter box through a water inlet pipe, the water flow drives an impeller to rotate, and a filter plate filters the water. When the impeller rotates, it drives multiple brushes to rotate, and the multiple brushes clean the impurities filtered on the surface of the filter plate to prevent the impurities from clogging the filter plate and affecting the drainage efficiency. When the brushes rotate, the cleaned impurities are driven into a discharge box, and the impurities are discharged from the filter box through the discharge box.

[0014] 2. The present invention provides a drainage structure for water conservancy and hydropower construction. When the water flow drives impeller 1 to rotate, impeller 1 drives gear 1 to rotate through shaft 1, and gear 1 drives impeller 2 to rotate through a chain, gear 2 and shaft 2. The rotation of impeller 2 can discharge water in the impurity box, thereby accelerating the discharge rate of impurities.

[0015] 3. The present invention provides a drainage structure for water conservancy and hydropower construction, which performs secondary filtration on water through filter cylinder 1 and filter cylinder 2, further reducing the impurity content in the water and preventing impurities from entering the water pump and causing damage to the water pump. The elbow is connected to the buffer box at a certain angle, and the water entering the buffer box will rotate in the buffer box. The rotating water flow cleans the impurities attached to filter cylinder 1 and filter cylinder 2, preventing impurities from affecting the filtration efficiency of filter cylinder 1 and filter cylinder 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic cross-sectional structural diagram of the filter box of the present invention; Figure 3 This is an enlarged structural diagram of point A of the present invention; Figure 4 It is a schematic cross-sectional structural diagram of the impurity removal box of the present invention; Figure 5This is a schematic cross-sectional view of the gearbox of the present invention; Figure 6 This is a schematic diagram of the explosion structure of the buffer box of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the box cover of the present invention.

[0018] In the picture: 1. Push cart; 2. Water pump; 3. Buffer box; 301. Support frame 1; 302. Support frame 2; 303. Filter cartridge 1; 304. Filter cartridge 2; 305. Box cover; 306. Connecting pipe; 307. Elbow pipe; 308. Porthole; 4. Hose; 5. Filter mechanism; 501. Filter box; 502. Water inlet pipe; 503. Drain box; 504. Filter plate; 505. Impeller 1; 506. Brush; 507. Impeller 2; 508. Gear box; 509. Gear 1; 510. Gear 2; 511. Chain; 512. Rope ring. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] Example 1 like Figure 1-7As shown, the present invention provides a drainage structure for water conservancy and hydropower construction, including a cart 1, the interior of the cart 1 is provided with a water pump 2 for pumping water and a buffer box 3 for secondary filtration, the input end of the buffer box 3 is provided with a hose 4, one end of the hose 4 is provided with a filtering mechanism 5 for preliminary filtration, the filtering mechanism 5 includes a filter box 501, the outer surface of the filter box 501 is fixedly connected to the water inlet pipe 502, the impeller box 503 and the drain pipe, the filter box 501 is fixedly connected to the filter plate 504, the filter box 501 is rotatably connected to the interior of the filter box 501, the outer surface of the shaft is sleeved with an impeller 505, the outer end of the impeller 505 is fixedly connected to a brush 506 in a circumferential array, and the outer end of the brush 506 is fixedly connected to the filter plate 5 04 contact, the internal rotation of the exhaust box 503 is connected to the rotating shaft 2, the outer surface of the rotating shaft 2 is sleeved with the impeller 2 507, the drain pipe is fixedly connected to the hose 4, the filter box 501 and the side of the exhaust box 503 are fixedly connected to the gear box 508, one end of the rotating shaft 1 passes through the side of the filter box 501 and the gear box 508 and is fixedly connected to the gear 1 509, one end of the rotating shaft 2 passes through the side of the exhaust box 503 and the gear box 508 and is fixedly connected to the gear 2 510, the gear 1 509 and the gear 2 510 are both located inside the gear box 508, the outer ring surface of the gear 1 509 and the gear 2 510 is movably connected with a chain 511, the outer surface of the filter box 501 is fixedly connected to the rope ring 512, and the rope ring 512 is connected to the rope.

[0022] In this embodiment, when draining the foundation pit, the cart 1 is pushed to drive the drainage structure as a whole to the working position, a hose 4 of appropriate length is selected according to the depth of the foundation pit, and the hose 4 is connected to the buffer box 3 and the filter mechanism 5 respectively, the rope is connected to the rope ring 512, and the filter box 501 is lowered into the foundation pit through the rope, and the water pump 2 is started. The water in the foundation pit enters the filter box 501 through the water inlet pipe 502, and the filter plate 504 performs a primary filtration on the water entering the filter box 501. The water after the primary filtration enters the buffer box 3 through the hose 4, and the buffer box 3 performs a secondary filtration on the water, thereby reducing the impurity content in the water and preventing the impurities in the water from interfering with the operation of the water pump 2. The water after the secondary filtration is discharged through the water pump 2, thereby draining the water in the foundation pit; When water in the foundation pit enters the filter box 501, the water flow drives the impeller 505 to rotate, and the filter plate 504 filters the water. When the impeller 505 rotates, it drives the multiple brushes 506 to rotate. The multiple brushes 506 rotate to clean the impurities filtered on the surface of the filter plate 504, so as to prevent the impurities filtered by the filter plate 504 from clogging the filter holes on the filter plate 504 and affecting the filtering efficiency of the filter plate 504. As the brushes 506 rotate, the brushes 506 drive the cleaned impurities into the discharge box 503 and discharge them from the filter box 501 through the discharge box 503. When the water flow drives the impeller 1 505 to rotate, the impeller 1 505 drives the gear 1 509 to rotate through the rotating shaft 1, and the gear 1 509 drives the impeller 2 507 to rotate through the chain 511, the gear 2 510 and the rotating shaft 2. The rotation of the impeller 2 507 can discharge the water in the impurity discharge box 503, thereby accelerating the discharge rate of impurities. The gear box 508 stores and protects the gear 1 509 , the gear 2 510 and the chain 511 to prevent impurities in the water from affecting the rotation of the gear 1 509 , the gear 2 510 and the chain 511 .

[0023] Example 2 like Figure 1-7 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the interior of the buffer box 3 is fixedly connected with a support frame 1 301 and a support frame 2 302, the support frame 1 301 and the support frame 2 302 are concentrically arranged, the outer surfaces of the support frame 1 301 and the support frame 2 302 are movably connected with a filter cylinder 1 303 and a filter cylinder 2 304, the top surface of the support frame 1 301 is threadedly connected to a box cover 305, the top surface of the box cover 305 is rotatably connected to a connecting pipe 306, and the connecting pipe 306 is rotatably connected to the inner surface of the connecting pipe 306. One end is threadedly connected to the input end of the water pump 2. An annular groove is provided on the inner bottom surface of the support frame 1 301. There are two annular grooves, which are respectively clamped on the filter cylinder 1 303 and the filter cylinder 2 304. The bottom surface of the box cover 305 is fixedly connected to an annular plate. There are two annular plates, which are movably connected to the support frame 1 301 and the support frame 2 302 respectively. The outer surface of the support frame 1 301 is fixedly connected to a bend pipe 307 and a porthole 308. The bend pipe 307 is fixedly connected to the hose 4.

[0024] In this embodiment, when draining the foundation pit, the water pump 2 is started, and the water in the foundation pit enters the hose 4 through the water inlet pipe 502, the filter box 501 and the filter plate 504. The water in the hose 4 enters the buffer box 3 through the elbow 307. The filter cartridge 1 303 and the filter cartridge 2 304 filter the water entering the buffer box 3, thereby further reducing the impurity content in the water. The water filtered by the filter cartridge 1 303 and the filter cartridge 2 304 is discharged from the buffer box 3 through the connecting pipe 306 and enters the water pump 2. The output end of the water pump 2 discharges the water, thereby draining the water in the foundation pit. The buffer box 3 supports the filter cartridge 1 303 and the filter cartridge 2 304 through the support frame 1 301, the support frame 2 302 and the annular groove, respectively, to improve the working stability of the filter cartridge 1 303 and the filter cartridge 2 304. Two annular plates are connected to the bottom of the box cover 305. When the box cover 305 is connected to the support frame 1 301, the two annular plates are respectively located on the outer surface of the top of the filter cartridge 1 303 and the filter cartridge 2 304, thereby further improving the stability of the filter cartridge 1 303 and the filter cartridge 2 304. The elbow 307 is connected to the buffer tank 3 at a certain angle. The water entering the buffer tank 3 rotates in the buffer tank 3. The rotating water flow can clean the impurities filtered by the filter cartridge 1 303 and the filter cartridge 2 304, thereby preventing the impurities from adhering to the filter cartridge 1 303 and the filter cartridge 2 304 for a long time and affecting the filtration efficiency of the filter cartridge 1 303 and the filter cartridge 2 304. During the drainage process, the operator can observe the impurity content inside the buffer box 3 through the porthole 308, which is convenient for the operator to clean the impurities inside the buffer box 3 in time.

[0025] A method for constructing a drainage structure for water conservancy and hydropower, comprising the following steps: S1: Push the cart 1 to drive the drainage structure as a whole to the working position, select a hose 4 of appropriate length according to the depth of the foundation pit, and connect the hose 4 to the buffer box 3 and the filter mechanism 5 respectively, connect the rope to the rope ring 512, and lower the filter box 501 into the foundation pit through the rope, start the water pump 2, and the water in the foundation pit enters the filter box 501 through the water inlet pipe 502. The filter plate 504 performs a primary filtration on the water entering the filter box 501. The water after the primary filtration enters the buffer box 3 through the hose 4. The buffer box 3 performs a secondary filtration on the water, thereby reducing the impurity content in the water and preventing the impurities in the water from interfering with the operation of the water pump 2. The water after the secondary filtration is discharged through the water pump 2, thereby draining the water in the foundation pit; S2: When water in the foundation pit enters the filter box 501, the water flow drives the impeller 1 505 and the multiple brushes 506 to rotate. The multiple brushes 506 rotate to clean the impurities filtered on the surface of the filter plate 504 to prevent the impurities filtered by the filter plate 504 from clogging the filter holes on the filter plate 504. When the brushes 506 rotate, the cleaned impurities are driven into the impurity discharge box 503, and the impurities are discharged from the filter box 501 through the impurity discharge box 503; S3: When the impeller 1 505 rotates, the gear 1 509 is driven to rotate through the rotating shaft 1. The gear 1 509 drives the impeller 2 507 to rotate through the chain 511, the gear 2 510 and the rotating shaft 2. The rotation of the impeller 2 507 can discharge the water in the impurity discharge box 503, thereby accelerating the discharge rate of impurities. S4: When the water flows into the buffer tank 3 through the hose 4, the filter cartridge 1 303 and the filter cartridge 2 304 filter the water entering the buffer tank 3, thereby further reducing the impurity content in the water. The water filtered by the filter cartridge 1 303 and the filter cartridge 2 304 is discharged from the buffer tank 3 through the connecting pipe 306 and enters the water pump 2. The output end of the water pump 2 discharges the water, thereby discharging the water in the foundation pit.

[0026] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0027] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A drainage structure for water conservancy and hydropower construction, comprising a cart (1), characterized in that: The cart (1) is provided with a water pump (2) for pumping water and a buffer tank (3) for secondary filtration. The input end of the buffer tank (3) is provided with a hose (4). One end of the hose (4) is provided with a filtering mechanism (5) for primary filtration. The filtering mechanism (5) comprises a filter box (501), the outer surface of the filter box (501) is fixedly connected to a water inlet pipe (502), a debris removal box (503) and a drain pipe, the filter box (501) is fixedly connected to a filter plate (504), the filter box (501) is rotatably connected to a rotating shaft 1, the outer surface of the rotating shaft 1 is sleeved with an impeller 1 (505), the outer end of the impeller 1 (505) is fixedly connected to a brush (506) in a circumferential array, and the outer end of the brush (506) is in contact with the filter plate (504); The interior of the impurity discharge box (503) is rotatably connected to a second rotating shaft, and the outer surface of the second rotating shaft is sleeved with a second impeller (507); The drain pipe is fixedly connected to the hose (4).

2. A water conservancy and hydropower construction drainage structure according to claim 1, characterized in that: The sides of the filter box (501) and the impurity discharge box (503) are fixedly connected to a gear box (508); one end of the first rotating shaft passes through the sides of the filter box (501) and the gear box (508) and is fixedly connected to a gear one (509); one end of the second rotating shaft passes through the sides of the impurity discharge box (503) and the gear box (508) and is fixedly connected to a gear two (510); The gear 1 (509) and the gear 2 (510) are both located inside the gear box (508), and the outer ring surfaces of the gear 1 (509) and the gear 2 (510) are movably connected with a chain (511).

3. A water conservancy and hydropower construction drainage structure according to claim 1, characterized in that: A rope ring (512) is fixedly connected to the outer surface of the filter box (501), and the rope ring (512) is connected to a rope.

4. A water conservancy and hydropower construction drainage structure according to claim 1, characterized in that: The buffer box (3) is fixedly connected to a support frame 1 (301) and a support frame 2 (302) inside, and the support frame 1 (301) and the support frame 2 (302) are concentrically arranged. The outer surfaces of the support frame 1 (301) and the support frame 2 (302) are movably connected to a filter cylinder 1 (303) and a filter cylinder 2 (304). The top surface of the support frame 1 (301) is threadedly connected to a box cover (305), and the top surface of the box cover (305) is rotatably connected to a connecting pipe (306), and one end of the connecting pipe (306) is threadedly connected to the input end of the water pump (2).

5. A water conservancy and hydropower construction drainage structure according to claim 4, characterized in that: The inner bottom surface of the support frame 1 (301) is provided with an annular groove, and the number of the annular grooves is two. The two annular grooves are respectively connected to the filter cylinder 1 (303) and the filter cylinder 2 (304).

6. A water conservancy and hydropower construction drainage structure according to claim 4, characterized in that: The bottom surface of the box cover (305) is fixedly connected to an annular plate, and the number of the annular plates is two. The two annular plates are movably connected to the support frame 1 (301) and the support frame 2 (302) respectively.

7. A water conservancy and hydropower construction drainage structure according to claim 4, characterized in that: A curved pipe (307) and a porthole (308) are fixedly connected to the inner portion of the outer surface of the support frame 1 (301), and the curved pipe (307) is fixedly connected to the hose (4).

8. A method for constructing a drainage structure for water conservancy and hydropower, applied to a drainage structure for water conservancy and hydropower construction as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The drainage structure is driven as a whole to the working position by pushing the cart (1), a hose (4) of appropriate length is selected according to the depth of the foundation pit, and the hose (4) is connected to the buffer box (3) and the filter mechanism (5) respectively, a rope is connected to the rope ring (512), and the filter box (501) is lowered into the foundation pit through the rope, and the water pump (2) is started. The water in the foundation pit enters the filter box (501) through the water inlet pipe (502), and the filter plate (504) performs a primary filtration on the water entering the filter box (501). The water after the primary filtration enters the buffer box (3) through the hose (4), and the buffer box (3) performs a secondary filtration on the water, thereby reducing the impurity content in the water and preventing the impurities in the water from interfering with the operation of the water pump (2). The water after the secondary filtration is discharged through the water pump (2), thereby discharging the water in the foundation pit; S2: When water in the foundation pit enters the filter box (501), the water flow drives the impeller 1 (505) and the plurality of brushes (506) to rotate. The plurality of brushes (506) rotate to clean the impurities filtered on the surface of the filter plate (504), so as to prevent the impurities filtered by the filter plate (504) from clogging the filter holes on the filter plate (504). When the brushes (506) rotate, the cleaned impurities are driven into the impurity discharge box (503), and the impurities are discharged from the filter box (501) through the impurity discharge box (503); S3: When the impeller 1 (505) rotates, the gear 1 (509) is driven to rotate via the rotating shaft 1. The gear 1 (509) drives the impeller 2 (507) to rotate via the chain (511), the gear 2 (510) and the rotating shaft 2. The rotation of the impeller 2 (507) can discharge the water in the impurity discharge box (503), thereby accelerating the discharge rate of impurities. S4: When the water flows into the buffer tank (3) through the hose (4), the filter cylinder 1 (303) and the filter cylinder 2 (304) filter the water entering the buffer tank (3), thereby further reducing the impurity content in the water. The water filtered by the filter cylinder 1 (303) and the filter cylinder 2 (304) is discharged from the buffer tank (3) through the connecting pipe (306) and enters the water pump (2). The output end of the water pump (2) discharges the water, thereby discharging the water in the foundation pit.

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