Anti-blocking drainage method for hydraulic engineering construction

Abstract

The invention discloses an anti-blocking drainage method for hydraulic engineering construction, and belongs to the technical field of water supply and drainage. An overflow pipe is connected to the outside of one end, facing water flow, of a filter plate of a main pipeline for drainage, a drainage pipe is connected to the side wall of the top end of the overflow pipe, and a water wheel assembly is arranged in the drainage pipe; when the interior of the main pipeline is silted and blocked, water flow upwards flows into the drainage pipe through the overflow pipe and pushes the water wheel assembly to rotate in the process that the water flow flows down through the drainage pipe, so that the filter plate is driven to rotate in the main pipeline; and when the silting blockages in the main pipeline are taken away and the water flow can normally flow out through the main pipeline, no water flows into the overflow pipe, so that the impeller assembly stops rotating, and the filter plate returns to the original position for intercepting and filtering the water flow in the main pipeline. The anti-blocking device can automatically achieve the anti-blocking effect of the drainage system in water conservancy construction.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply and drainage, and particularly to a drainage method for preventing blockage in water conservancy project construction. Background Art

[0002] In water conservancy project construction, the smoothness of the drainage system is the key to ensuring project quality and construction safety. Because during the construction process, it is easy to be blocked by the accumulation of sediment, gravel and other blockage substances, which affects the construction progress and even causes safety accidents. The drainage technology in water conservancy project construction needs to be flexibly combined and implemented according to geological conditions, hydrological characteristics and project requirements. Generally, ditches are excavated on the ground surface or in the foundation pit, and then drainage pipes are laid, and the water is drained by natural gravity or combined with a water pump, that is, the water is guided to the sump and then pumped out. In the traditional drainage system, for the anti-blocking measures of the drainage system, basically a blind well such as an inspection well is set on a certain section of the drainage pipeline, and a filtering element such as a filter plate is set at a certain place in the well. When draining water, when the water flows through the blind well and then passes through the filter plate, the sediment blockage substances and the like are left on the filter plate. This structure is simple, the installation and construction are convenient, and the cost is extremely low, but the anti-blocking effect is not good. After the filter plate is used for a period of time, a large amount of sediment and gravel blocks will accumulate in the well, causing the drainage pipeline to be blocked and unable to drain water normally. At this time, it is necessary to check one by one manually and manually dredge, but it will be blocked again soon. Therefore, developing an anti-blocking drainage system that can effectively prevent the drainage system from being blocked is of great significance for improving the construction efficiency and safety of water conservancy projects. Summary of the Invention

[0003] (1) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a drainage method for preventing blockage in water conservancy project construction. By using this drainage method for water conservancy project construction, automatic dredging and dredging of the underground drainage system can be realized, and the accumulated large amount of water flow impact force is used to centrally scour the drainage system pipeline and carry away the sediment blockage substances near the filter plate, thereby effectively preventing the drainage system from being blocked.

[0004] (2) Technical Solutions To achieve the above object, the present invention provides the following technical solution: A clogging prevention drainage method for water conservancy project construction. A rotatable filter plate is arranged in the main pipe for drainage. An overflow pipe is connected to the main pipe outside one end of the filter plate facing the water flow. The overflow pipe is vertically arranged. A drainage pipe is connected to the side wall at the top of the overflow pipe. A water wheel assembly is arranged in the drainage pipe. The rotating shaft of the water wheel assembly is coaxially and fixedly connected to the hinge shaft of the filter plate as a whole. When the main pipe is silted and clogged, the water flows upward through the overflow pipe into the drainage pipe, and during the process of flowing down through the drainage pipe, it drives the water wheel assembly to rotate, so as to drive the filter plate to rotate in the main pipe, allowing the water flow to wash away at least a part of the silt and clogging substances in the main pipe. When the silt and clogging substances in the main pipe are carried away and the water flow can normally flow out of the main pipe completely, no water surges into the overflow pipe, so that the impeller assembly stops rotating, and the filter plate returns to its original position of intercepting and filtering the water flow in the main pipe.

[0005] Further, a flow velocity sensor is also arranged outside one end of the filter plate along the water flow direction. The flow velocity sensor is used to detect whether there is water flowing past near the filter plate; a regulating valve is also arranged in the overflow pipe. When the flow velocity sensor detects that the water flow velocity is lower than the set value, operate the regulating valve to increase the overflow flow rate in the overflow pipe.

[0006] Further, a counterweight is fixed at the lower side of the filter plate near its edge. This counterweight enables the filter plate to be in a cross-section of the main pipe when the main pipe is unclogged, so that when the water wheel assembly stops rotating, the filter plate can quickly return to its original position.

[0007] Further, the periphery of the filter plate is circular steel bars, and the steel bars are in sliding contact with the inner wall of the main pipe. A stainless steel metal hollow plate is coaxially fixed in the inner circular area of the steel bars.

[0008] Further, the rotating shaft and the hinge shaft are connected by a slipping structure. When the filter plate rotates to a temporary direction non-perpendicular to the main pipe, it can no longer rotate synchronously with the rotating shaft. At this time, the hinge shaft does not rotate, and the rotating shaft rotates coaxially relative to the hinge shaft and slips.

[0009] Further, the slipping structure is made in the following way: One end of the rotating shaft inserted into the hinge shaft has a connecting end with a T-shaped cross-section. A stud is coaxially fixed at the center of the end of the connecting end. A cylindrical spring is sleeved outside the stud. The cylindrical spring is axially pressed by a locking nut. The locking nut is tightened at one end of the stud extending out of the frame of the filter plate. Then, within a set torque range, the rotating shaft is coaxially fixed to the hinge shaft as a whole due to the axial thrust of the cylindrical spring. When the hinge shaft is blocked by a limiting block fixed on the inner wall of the main pipe and cannot rotate, the rotating shaft rotates coaxially relative to the hinge shaft against the thrust of the cylindrical spring.

[0010] Further, on the end face of the end of the hinge shaft away from the rotating shaft, a limit pin is fixed. In the installation hole for the end of the hinge shaft away from the rotating shaft to rotatably install in the main pipeline, the limit block is radially fixed. When the hinge shaft rotates until the limit pin contacts the limit block, it can no longer continue to rotate along the force of the water flow pushing the water wheel assembly. At this time, the filter plate is on the longitudinal section of the main pipeline, allowing the water flow to pass through the main pipeline to the greatest extent.

[0011] Further, the drainage pipe includes an inclined pipe and an L-shaped water inlet pipe. One end of the water inlet pipe is connected to one side of the main pipeline, and it is ensured that the connection part is on the side of the filter plate away from the inclined pipe; the other end of the water inlet pipe is connected to the inclined pipe. The middle of this water inlet pipe bulges upward to form an installation chamber, and the water wheel assembly is installed in this installation chamber. When the water flow passes through the installation chamber, it only contacts the impeller on the lower side of the water wheel assembly.

[0012] Further, one end of the main pipeline in the water flow direction is closed, but a drainage pipe is connected to the bottom of its closed end. One end of the water inlet pipe is arranged directly above the interface between the drainage pipe and the main pipeline. When the water flows out of one end of the water inlet pipe, it just falls into the inlet of the drainage pipe directly below, preventing the water flow from flowing back through the filter plate at this time.

[0013] In addition, in the above invention, a water supply pipeline can also be connected to one side of the drainage pipe. After the worker connects the water supply pipeline to an external water source, the water wheel assembly is actively started to drive the filter plate to flip.

[0014] (III) Beneficial effects The present invention provides a method for preventing blockage and draining water in water conservancy project construction. Through a drainage pipeline system formed by a main pipeline cooperating with a drainage pipe and an overflow pipe on one side, drainage is realized. Moreover, water only flows into the drainage pipe when the main pipeline is blocked to a certain extent, and then drives the rotation of a water wheel assembly installed inside, realizing the rotation of the hinge shaft of the filter plate installed coaxially, and causing the filter plate, which is a flow regulating element of the main pipeline, to open accordingly, allowing a large amount of water to suddenly gush out of the main pipeline. This not only centrally takes away the blockage deposits near the filter plate, but also flushes the inner wall of the main pipeline all the way, washing away some attachments on the rest of the pipe wall, automatically achieving the purpose of cleaning and dredging the main pipeline and preventing blockage.

[0015] This method can set filter plates at specific main pipeline positions, and then cooperate with corresponding conventional inspection wells to actively set the silted parts of the main pipeline at an easily maintainable position, avoiding the situation of aimless siltation in the pipeline, which may lead to problems of difficult cleaning and dredging. Moreover, when cleaning and dredging, a filtering device for intercepting blockages can be set in advance at the outlet end of the drainage system to systematically remove and transfer the silt, gravel, residual geotextiles and other wastes generated by water conservancy construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of the present invention; Figure 2 is a top view of the present invention; Figure 3 is a schematic connection diagram of the water wheel assembly and the filter plate in linkage; Figure 4 is a schematic cross-sectional view of the water inlet pipe at the installation bin; Figure 5 is a schematic diagram of the installation of the water wheel assembly in the installation bin; Figure 6 is Figure 3 an enlarged sectional view at F in

[0017] In the figure: 1 - main pipeline, 2 - filter plate, 3 - overflow pipe, 4 - regulating valve, 5 - installation bin, 6 - rotating shaft, 601 - connection end, 7 - hinge shaft, 8 - stud, 9 - steel bar, 10 - water wheel assembly, 11 - water inlet pipe, 12 - cylindrical spring, 13 - flow velocity sensor, 14 - inclined pipe, 15 - drainage pipeline, 16 - locking nut, 17 - counterweight, 18 - limit pin, 19 - limit block, 20 - installation hole, 701 - step surface. SPECIFIC EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] This embodiment introduces a drainage method for preventing blockage in water conservancy project construction, as Figure 1 - Figure 2As shown in the figure, after the drainage ditch is excavated, when installing the drainage pipe, a rotatable filter plate 2 can be arranged in the main pipe 1 for drainage. On the main pipe 1 outside one end of the filter plate 2 facing the water flow, assuming the water flow is from right to left, an overflow pipe 3 is fixedly connected to the main pipe 1 on the right side of the filter plate 2. This overflow pipe 3 is preferably installed vertically. At the same time, a drainage pipe is connected to the side wall of the top end of the overflow pipe 3, and a water wheel assembly 10 is arranged in the drainage pipe. When the water flows through the drainage pipe, it will surely touch the water wheel assembly 10, and then the water wheel assembly 10 can be rotated. Moreover, the rotating shaft 6 of the water wheel assembly 10 in this embodiment needs to be integrally combined with the hinge shaft 7 of the filter plate 2 in a coaxial fixed connection manner. When the main pipe 1 is silted and blocked, the water flows through the overflow pipe 3, and then the water flows upward into the drainage pipe and flows down through the drainage pipe, pushing the water wheel assembly 10 to rotate, so that the filter plate 2 can be driven to rotate in the main pipe 1. In this way, when the filter plate 2 is not in the cross-section of the main pipe 1, the water flow and part of the silted and blocked materials can flow through. When the filter plate 2 is in a horizontal position, for example, the water flow can wash away most or even all of the silted and blocked materials in the main pipe 1. When the silted and blocked materials in the main pipe 1 are taken away, and then the water flow can normally flow out of the main pipe 1 completely, no more water will rush into the overflow pipe 3, so that the impeller assembly stops rotating, and then the filter plate 2 returns to the original position of intercepting and filtering the water flow in the main pipe 1, that is, maintaining its filtering and intercepting function, thus preventing blockage. When the main pipe 1 is blocked to a certain extent, the water flow changes direction and drives the water wheel assembly 10 to open the filter plate 2, so that the blocked silted and blocked materials can be carried out of the pipe under the scouring of a large amount of concentrated water flow.

[0020] As Figure 1 shown, in practice, a flow velocity sensor 13 can also be arranged outside one end of the filter plate 2 along the water flow direction. This flow velocity sensor 13 is used to detect whether there is water flowing past the filter plate 2 and how large the flow velocity is. At the same time, a regulating valve 4 can also be arranged in the overflow pipe 3. When the flow velocity sensor 13 detects that the water flow velocity is lower than the set value, the regulating valve 4 is operated to increase the overflow flow in the overflow pipe 3, so that the water flow quickly and largely flows into the overflow pipe 3, and then quickly pushes the water wheel assembly 10 to rotate, timely discharging the silted and blocked materials and dredging the pipe. In order to maintain the filter plate 2 in a set initial position, as Figure 3 shown, a counterweight 17 can be fixed at the lower side near the edge of the filter plate 2. Due to the action of this counterweight 17, when the main pipe 1 is unblocked, the filter plate 2 is in a cross-section of the main pipe 1, so that when the water wheel assembly 10 stops rotating, the filter plate 2 can quickly return to the original position, that is, resume the intercepting and filtering function, and only when it is necessary to actively clean the silted and blocked materials at the filter plate 2, the filter plate 2 is flipped to let the silted and blocked materials flow out, and then collected and processed centrally.

[0021] In addition, in practice, an external water supply pipe can be installed on the overflow pipe 3 to actively supply water to the corresponding pipeline, and the filter plate 2 can be flipped by the water wheel assembly 10. Of course, an additional automatic flipping mechanism can also be provided to manually flip the filter plate 2 actively when necessary, so as to manually and actively discharge the accumulated blockages, and a device for collecting the accumulated blockages can be preparedly arranged at the discharge outlet of the main pipeline 1.

[0022] Specifically, as Figure 3 shown, the periphery of the filter plate 2 is a circular steel bar 9, and the steel bar 9 is in sliding contact with the inner wall of the main pipeline 1 for flexible rotation. A stainless steel metal hollow plate is coaxially fixed within the inner circular area of the steel bar 9 to intercept some of the accumulated blockages, so as to avoid being scattered everywhere in the main pipeline 1, which is not convenient for later dredging and maintenance. And it is specially arranged near the filter plate 2, which can facilitate the excavation of a manhole for cleaning nearby. The specific implementation can refer to the existing technology.

[0023] To prevent the continuous rotation of the filter plate 2, as Figure 3 and Figure 6 shown, a slipping structure needs to be used to connect the rotating shaft 6 and the hinge shaft 7. When the filter plate 2 rotates to a temporary direction that is not perpendicular to the main pipeline 1, it can no longer rotate synchronously with the rotating shaft 6. That is, at this time, the hinge shaft 7 does not rotate, while the rotating shaft 6 rotates coaxially relative to the hinge shaft 7 and slips. The filter plate 2 maintains an attitude of opening the main pipeline 1, continuously discharging a large amount of water, and discharging the accumulated blockages concentratedly. During specific production, the slipping structure is as Figure 6 shown, and it is mainly manufactured in the following way. One end of the rotating shaft 6 inserted into the hinge shaft 7 has a connecting end 601 with a T-shaped cross-section. In the center of the end of this connecting end 601, a stud 8 is also coaxially fixed. A cylindrical spring 12 is sleeved outside the stud 8. Preferably, the surface of the stud 8 where the spring is sleeved is smooth and has no threads. The cylindrical spring 12 is axially pressed by a locking nut 16. This locking nut 16 is tightened at one end of the stud 8 extending out of the frame of the filter plate 2. That is, after the stud 8 extends out of the clearance-fitting screw hole, a locking nut 16 is screwed onto the end of the stud 8. Depending on the end face of the locking nut 16 in contact with a step surface 701 at the integrated part of the hinge shaft 7 and the steel bar 9, such as Figure 6 shown, the left end face of the locking nut 16, to achieve relative sliding, and then the rotating shaft 6 can be coaxially fixed to the hinge shaft 7 as a whole within a set torque range due to the axial thrust of the cylindrical spring 12, and temporarily rotate synchronously as one shaft. When the hinge shaft 7 is fixed on the inner wall of the main pipeline 1, as Figure 3When the limit block 19 shown is blocked and cannot rotate, the rotating shaft 6 overcomes the thrust of the cylindrical spring 12 and then rotates coaxially relative to the hinge shaft 7. The filter plate 2 does not move, and the water wheel assembly 10 continues to rotate until the water flow in the main pipe 1 is only enough to flow out of the main pipe 1. The water wheel assembly 10 naturally stops, and because the water volume is reduced, the filter plate 2 is automatically flipped and reset due to its own weight.

[0024] like Figure 3 As shown, in this embodiment, a limit pin 18 is fixed on the end face of the hinge shaft 7 away from the rotating shaft 6, and a limit block 19 is radially fixed in the mounting hole 20 of the main pipe 1 for the hinge shaft 7 to be rotatably mounted at the end away from the rotating shaft 6, that is, the limit block 19 is protrudingly fixed on the inner wall of the mounting hole 20. During use, when the hinge shaft 7 rotates until the limit pin 18 contacts the limit block 19, the water wheel assembly 10 can no longer continue to rotate along the force of the water flow, and the filter plate 2 can be located on the longitudinal section of the main pipe 1, so that the water flow can pass through the main pipe 1 to the greatest extent, and the silt blockage accumulated near the filter plate 2 can be discharged in a concentrated manner.

[0025] As a more detailed implementation, Figure 1 - Figure 2 As shown, the drainage pipe includes an inclined pipe 14 and an L-shaped water inlet pipe 11. One end of the water inlet pipe 11 is connected to one side of the main pipeline 1, and the connecting portion is located on the side of the filter plate 2 away from the inclined pipe 14. The other end of the water inlet pipe 11 is connected to the inclined pipe 14, as shown in FIG. Figure 4 - Figure 5 ,actually, Figure 3 The structure shown is Figure 5 A schematic diagram of the installation structure of the present invention in the AA section direction in FIG. 1 shows that the center of the water inlet pipe 11 used in the invention has an upward bulge with an installation chamber 5, in which a water wheel assembly 10 is installed. When water flows through the installation chamber 5, it only contacts the impeller on the lower side of the water wheel assembly 10, so as to drive the water wheel assembly 10 to rotate. In order to prevent water from flowing back and impacting the end surface of the filter plate 2, as shown in FIG. Figure 1 As shown, one end of the main pipe 1 along the water flow direction is closed, but a drainage pipe 15 is connected to the bottom of the closed end. One end of the water inlet pipe 11 mentioned above is specially arranged just above the interface between the drainage pipe 15 and the main pipe 1. When water flows out of one end of the water inlet pipe 11, it just falls into the inlet of the drainage pipe 15 just below it, and then discharged outward, avoiding the water flow at this time to flow back through the filter plate 2.

[0026] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drainage method for preventing blockage in water conservancy project construction, characterized in that, A rotatable filter plate (2) is arranged in the main pipe (1) for drainage. An overflow pipe (3) is connected to the main pipe (1) outside one end of the filter plate (2) facing the water flow. The overflow pipe (3) is arranged vertically. A drainage pipe is connected to the side wall at the top of the overflow pipe (3). A water wheel assembly (10) is arranged in the drainage pipe. The rotating shaft (6) of the water wheel assembly (10) is coaxially and fixedly connected to the hinge shaft (7) of the filter plate (2). When the main pipe (1) is silted and blocked, the water flows upward through the overflow pipe (3) into the drainage pipe, and during the process of flowing down through the drainage pipe, it pushes the water wheel assembly (10) to rotate, so as to drive the filter plate (2) to rotate in the main pipe (1), allowing the water flow to wash away at least a part of the silt and blockage in the main pipe (1). When the silt and blockage in the main pipe (1) are carried away and the water flow can normally flow out of the main pipe (1) completely, no water surges into the overflow pipe (3), causing the impeller assembly to stop rotating, and the filter plate (2) returns to the original position of intercepting and filtering the water flow in the main pipe (1).

2. The anti-clogging drainage method for water conservancy project construction according to claim 1, characterized in that, A flow velocity sensor (13) is further arranged outside one end of the filter plate (2) along the water flow direction. The flow velocity sensor (13) is used to detect whether there is water flowing past near the filter plate (2). A regulating valve (4) is further arranged in the overflow pipe (3). When the flow velocity sensor (13) detects that the water flow velocity is lower than the set value, the regulating valve (4) is operated to increase the overflow flow rate in the overflow pipe (3).

3. A drainage method for preventing blockage in water conservancy project construction according to claim 1, characterized in that, A counterweight (17) is fixed at the lower side of the filter plate (2) near its edge. This counterweight (17) enables the filter plate (2) to be in a cross-section of the main pipe (1) when the main pipe (1) is unobstructed, so that when the water wheel assembly (10) stops rotating, the filter plate (2) can promptly return to the original position.

4. A drainage method for preventing blockage in water conservancy project construction according to claim 1, characterized in that, The periphery of the filter plate (2) is a circular steel bar (9). The steel bar (9) is in sliding contact with the inner wall of the main pipe (1). A stainless steel metal hollow plate is coaxially fixed in the inner circular area of the steel bar (9).

5. A drainage method for preventing blockage in water conservancy project construction according to claim 1, characterized in that, The rotating shaft (6) and the hinge shaft (7) are connected by a slipping structure. When the filter plate (2) rotates to a temporary direction non-perpendicular to the main pipe (1), it can no longer rotate synchronously with the rotating shaft (6). At this time, the hinge shaft (7) does not rotate, and the rotating shaft (6) rotates coaxially relative to the hinge shaft (7) and slips.

6. A drainage method for preventing blockage in water conservancy project construction according to claim 5, characterized in that, The slipping structure is fabricated in the following manner: One end of the rotating shaft (6) inserted into the hinge shaft (7) has a connecting end (601) with a T-shaped cross-section. A stud (8) is coaxially fixed at the center of the end of the connecting end (601). A cylindrical spring (12) is sleeved outside the stud (8), and the cylindrical spring (12) is axially pressed by a lock nut (16). The lock nut (16) is screwed onto one end of the stud (8) extending out of the frame of the filter plate (2). Then, within a set torque range, the rotating shaft (6) is coaxially fixed to the hinge shaft (7) as a whole due to the axial thrust of the cylindrical spring (12). When the hinge shaft (7) is blocked by a limiting block (19) fixed on the inner wall of the main pipe (1) and cannot rotate, the rotating shaft (6) rotates coaxially relative to the hinge shaft (7) against the thrust of the cylindrical spring (12).

7. A drainage method for preventing blockage in water conservancy project construction according to claim 6, characterized in that, On the end face of the end of the hinge shaft (7) facing away from the rotating shaft (6), a limiting pin (18) is fixed. In the installation hole (20) of the main pipe (1) for the end of the hinge shaft (7) facing away from the rotating shaft (6) to be rotatably installed, the limiting block (19) is radially fixed. When the hinge shaft (7) rotates to the position where the limiting pin (18) contacts the limiting block (19), it can no longer continue to rotate along the direction of the force pushing the water wheel assembly (10) by the water flow. At this time, the filter plate (2) is in the longitudinal section of the main pipe (1) to allow the water flow to pass through the main pipe (1) to the greatest extent.

8. A drainage method for preventing blockage in water conservancy project construction according to claim 1, characterized in that, The diversion pipe includes an inclined pipe (14) and an L-shaped water inlet pipe (11). One end of the water inlet pipe (11) is connected to one side of the main pipe (1), and it is ensured that the connection part is on the side of the filter plate (2) facing away from the inclined pipe (14). The other end of the water inlet pipe (11) is connected to the inclined pipe (14). The middle of this water inlet pipe (11) bulges upward to form an installation chamber (5), and the water wheel assembly (10) is installed in this installation chamber (5). When the water flow passes through the installation chamber (5), it only contacts the impeller on the lower side of the water wheel assembly (10).

9. A drainage method for preventing blockage in water conservancy project construction according to claim 8, characterized in that, One end of the main pipe (1) along the water flow direction is closed, but a drain pipe (15) is connected to the bottom of its closed end. One end of the water inlet pipe (11) is arranged directly above the interface between the drain pipe (15) and the main pipe (1). When the water flows out of one end of the water inlet pipe (11), it just falls into the inlet of the drain pipe (15) directly below, preventing the water flow from flowing back through the filter plate (2) at this time.

10. A drainage method for preventing blockage in water conservancy project construction according to claim 1, characterized in that, A water supply pipeline is also connected to one side of the diversion pipe. After the worker connects the water supply pipeline to an external water source, the water wheel assembly is actively started to drive the filter plate (2) to flip.

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