Water drainage method for hydraulic engineering construction

Abstract

The invention relates to the technical field of drainage structures, in particular to a drainage method for hydraulic engineering construction. The system comprises a sedimentation module and a water collection module, the sedimentation module comprises a sedimentation tank, the water collection module comprises a water collection tank, a plurality of communication mechanisms are communicated between the sedimentation tank and the water collection tank, each communication mechanism comprises two communication holes formed in the side walls of the sedimentation tank and the water collection tank at the same height, and the communication holes in the side walls of the sedimentation tank are located in the lower portion of the sedimentation tank; according to the drainage method for hydraulic engineering construction, the sedimentation tank is used for settling silt in collected water, and then the interception mechanism is used for filtering suspended impurities mixed in the water; when suspended impurities are accumulated in the intercepting plate, the intercepting plate slides up and down in the communicating pipe, so that the filtering effect can be kept while the accumulated impurities are removed; in the process that water flows through the communicating pipe, the gravitational potential energy difference of water level change can prevent silt from blocking the intercepting plate, and the intercepting plate can prevent impurities from entering the water collecting tank.

Description

Technical Field

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

[0002] When construction is carried out in low-lying areas, such as low-lying areas in cities or basements of buildings, rainwater cannot flow into the municipal rainwater pipe network by gravity after falling into these areas. Therefore, rainwater collection pools become key water conservancy engineering facilities. They collect rainwater by building a collection pool in a low-lying area, and then use a water pump to lift the water collected in the collection pool to a certain height so that it can flow into the subsequent municipal rainwater pipe network by gravity.

[0003] When the rainwater at the beginning of the rainy day and the construction water on the construction site on non-rainy days flows into the water collection tank, the water will be mixed with dust and sand from the construction site. This makes the water polluted to a certain extent and cannot be directly discharged into the municipal rainwater pipe network; on the other hand, the sand is easy to cause blockage when flowing in the pipe system, thus affecting the water supply and drainage efficiency of the water collection tank.

[0004] In view of this, we propose a drainage method for water conservancy project construction to improve the shortcomings of the existing technology. Summary of the invention

[0005] The object of the present invention is to provide a drainage method for water conservancy project construction to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides a drainage method for water conservancy project construction, comprising the following steps: S1. The sedimentation module set up in the open air in the low-lying area collects construction water and rainwater on the construction site and precipitates the sediment collected in the water; S2, after the sedimentation module is full of water, the switch provided on the connecting module is turned on to allow the water in the sedimentation module to flow into the sealed water collection module; S2.1. Construction water on non-rainy days and rainwater at the beginning of rainy days are precipitated in the sedimentation module and then flow into the water collection module; S2.2, after the rainwater in the middle and late rainy days flows into the sedimentation module, it directly passes through the connection module and enters the water collection module; S3, when the water in the sedimentation module passes through the connecting module and enters the water collection module, the interception module arranged on the water flow path filters out the suspended impurities in the water; S4, after the water collection module is full of water, the pumping module pumps out the water that has been precipitated and filtered in the low-lying water collection module; Wherein, the sedimentation module includes a sedimentation tank, the water collection module includes a water collection tank, a plurality of connecting mechanisms are connected between the sedimentation tank and the water collection tank, the connecting mechanism includes two connecting holes opened at the same height on the side walls of the sedimentation tank and the water collection tank, the connecting hole on the side wall of the sedimentation tank is located at the lower part of the sedimentation tank, and the connecting hole on the side wall of the water collection tank is located at the upper part of the water collection tank, the connecting mechanism also includes a connecting pipe arranged between the two connecting holes on the side walls of the sedimentation tank and the water collection tank, the switch includes a valve arranged on the connecting pipe, the pumping module includes a pumping pump group connected to the water collection tank, and the interception module includes an interception mechanism arranged on the connecting pipe; The interception mechanism at least comprises an interception plate capable of sliding up and down in the connecting pipe; The sedimentation tank is used to precipitate the sediment in the collected water, and the interception mechanism is used to filter the mixed suspended impurities in the water; When suspended impurities accumulate in the interception plate, the interception plate slides in the connecting pipe, which can maintain the filtering effect of the interception plate while removing the accumulated impurities; When water flows through the connecting pipe, the gravity potential energy difference caused by the change in water level can prevent the silt from clogging the interception plate, and the interception plate can prevent impurities from entering the water collection tank.

[0007] As a further improvement of the technical solution, the height of the bottom of the sedimentation tank gradually decreases from the side close to the connecting hole to the side far from the connecting hole.

[0008] As a further improvement of the technical solution, the valve includes a valve seat connected to the connecting pipe, a ball is rotatably connected inside the valve seat, and the ball has a flow channel along a diameter direction parallel to the waterway.

[0009] As a further improvement of the present technical solution, the interception mechanism also includes a mounting seat connected to the connecting pipe, the mounting seat has a water hole along the direction of the water flow path, and the interception plate slides in the mounting seat along a direction perpendicular to the water path.

[0010] As a further improvement of the present technical solution, the interception mechanism also includes a pair of hydraulic rods arranged on both sides of the mounting seat, the fixed part of each hydraulic rod is fixedly connected to the mounting seat, and the movable part of each hydraulic rod is fixedly connected to the interception plate.

[0011] As a further improvement of the technical solution, the intercepting plate includes a pair of symmetrically arranged grille bodies, and the two grille bodies are provided with fixing bolts at the ends away from each other, and the fixing bolts are fixedly connected to the movable part of the hydraulic rod. The grille bodies are provided with collecting grooves on both sides close to the sedimentation tank and the water collection tank, and the grille bodies are provided with multiple filter holes, and the multiple filter holes are connected to the two collecting grooves.

[0012] As a further improvement of the technical solution, an arc-shaped baffle is provided at the bottom of the collecting tank close to one side of the sedimentation tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the drainage method for water conservancy project construction, a sedimentation tank is set up to precipitate the silt in the collected water, and then an interception mechanism is used to filter the suspended impurities mixed in the water; when the suspended impurities accumulate in the interception plate, the interception plate slides up and down in the connecting pipe, which can maintain the filtering effect of the interception plate while removing the accumulated impurities; in the process of water flowing through the connecting pipe, the gravitational potential energy difference of the water level change can prevent the silt from clogging the interception plate, and the interception plate can prevent impurities from entering the water collection tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall mechanism of the present invention; Figure 3 It is a partially cutaway perspective view of the present invention; Figure 4 It is a cutaway front view of the sedimentation tank of the present invention; Figure 5 For the present invention Figure 3 The enlarged view of point A in the middle; Figure 6 This is a structural stereogram of the interception plate of the present invention; Figure 7 The second is a structural stereogram of the interception plate of the present invention; Figure 8 It is a cut-away front view of the grille body of the present invention.

[0015] The meaning of each number in the figure is: 100, sedimentation tank; 110, water collection tank; 120, connecting pipe; 130, water pumping unit; 140, valve; 150, connecting hole; 200, interception mechanism; 210, mounting seat; 211, water hole; 220, interception plate; 221. grille body; 222. collecting tank; 223. filter hole; 224. fixing bolt; 225. arc baffle; 230. hydraulic rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0017] In order to collect water (mainly rainwater and construction water) from construction sites in low-lying areas and then pump the collected water to a height where it can automatically flow into the municipal rainwater pipe network, a collection pool for storing water (i.e., the collection pool 110 to be described below) is set up.

[0018] See also Figure 1-Figure 3 As shown, the purpose of this embodiment is to provide a drainage method for water conservancy project construction, comprising the following steps: S1. The sedimentation module set up in the open air in the low-lying area collects construction water and rainwater on the construction site and precipitates the sediment collected in the water; S2, after the sedimentation module is full of water, the switch provided on the connecting module is turned on to allow the water in the sedimentation module to flow into the sealed water collection module; S2.1. Construction water on non-rainy days and rainwater at the beginning of rainy days are precipitated in the sedimentation module and then flow into the water collection module; S2.2, after the rainwater in the middle and late rainy days flows into the sedimentation module, it directly passes through the connection module and enters the water collection module; S3, when the water in the sedimentation module passes through the connecting module and enters the water collection module, the interception module arranged on the water flow path filters out the suspended impurities in the water; S4, after the water collection module is full of water, the pumping module pumps out the water that has been precipitated and filtered in the low-lying water collection module; Wherein, the sedimentation module includes a sedimentation tank 100, the water collection module includes a water collection tank 110, and a plurality of connecting mechanisms are connected between the sedimentation tank 100 and the water collection tank 110, and the connecting mechanism includes two connecting holes 150 opened at the same height on the side walls of the sedimentation tank 100 and the water collection tank 110, the connecting hole 150 on the side wall of the sedimentation tank 100 is located at the lower part of the sedimentation tank 100, and the connecting hole 150 on the side wall of the water collection tank 110 is located at the upper part of the water collection tank 110, and the connecting mechanism also includes a connecting pipe 120 arranged between the two connecting holes 150 on the side walls of the sedimentation tank 100 and the water collection tank 110, and the switch includes a valve 140 arranged on the connecting pipe 120, the pumping module includes a pumping pump group 130 connected to the water collection tank 110, and the interception module includes an interception mechanism 200 arranged on the connecting pipe 120; The interception mechanism 200 at least includes an interception plate 220 that can slide up and down in the connecting pipe 120; At the construction site, the water that needs to be collected mainly comes from construction water and rainwater. Inevitably, the construction water on non-rainy days and the rainwater in the early stage of rainy days will carry dust, sand, garbage and other debris on the construction site (divided into settleable sand and non-settled suspended impurities according to their density). Therefore, the sand in the collected water is precipitated through the sedimentation tank 100, and then the suspended impurities mixed in the water are filtered out through the interception mechanism 200; When suspended impurities accumulate in the interception plate 220, the interception plate 220 slides in the connecting pipe 120, which can maintain the filtering effect of the interception plate 220 while removing the accumulated impurities; When water flows through the connecting pipe 120 , the gravitational potential energy difference caused by the change in water level can prevent sediment from clogging the interception plate 220 , and the interception plate 220 can prevent impurities from entering the water collection tank 110 .

[0019] When it is not raining or when it has just started to rain, the water flowing on the surface of the construction site will be mixed with impurities (divided into settleable and non-settled). This makes the water polluted to a certain extent and cannot be directly discharged into the municipal rainwater pipe network. On the other hand, mud and sand can easily cause blockage when flowing in the pipe system, thereby affecting the water supply and drainage efficiency of the collection tank 110.

[0020] like Figure 4 As shown, the height of the bottom of the sedimentation tank 100 gradually decreases from the side close to the connecting hole 150 to the side far away from the connecting hole 150.

[0021] The improvement lies in that the valve 140 comprises a valve seat connected to the connecting pipe 120, a ball is rotatably connected inside the valve seat, and a flow channel is opened on the ball along a diameter direction parallel to the waterway.

[0022] That is to say, these impurities flow into the open-air sedimentation tank 100. As the water level in the sedimentation tank 100 rises, the settleable sediment contained in the water in the sedimentation tank 100 will gradually settle to the bottom of the sedimentation tank 100. Before the sedimentation tank 100 reaches its maximum water capacity, the flow channel of the valve 140 is kept perpendicular to the waterway direction of the connecting pipe 120, so that the connecting pipe 120 is always kept closed. When the sedimentation tank 100 is filled with water and the connecting pipe 120 is opened, water flows from the sedimentation tank 100 through the connecting pipe 120 to the water collection tank 110. When the sediment settled at the bottom of the sedimentation tank 100 wants to flow with the water flow, the sediment will be hindered by its own gravity, the friction between the sediment and the bottom of the sedimentation tank 100, and the mutual friction between the sediment, so that the sediment stays at the bottom of the sedimentation tank 100, minimizing the amount of sediment that follows the water flow into the water collection tank 110.

[0023] In addition to the sediment that can be settled, the water flow is also mixed with large suspended impurities, which will flow into the water collection tank 110 along with the water flow, which will deteriorate the water quality in the water collection tank 110 and still cannot be directly discharged into the municipal rainwater pipe network. Therefore, the interception mechanism 200 is used to filter out these large non-settled suspended impurities.

[0024] exist Figure 5 In the figure, the interception mechanism 200 also includes a mounting seat 210 connected to the connecting pipe 120. The mounting seat 210 is provided with a water hole 211 along the direction of the water flow path. The interception plate 220 slides in the mounting seat 210 along a direction perpendicular to the water path.

[0025] Furthermore, the interception mechanism 200 further includes a pair of hydraulic rods 230 disposed on both sides of the mounting seat 210 , a fixed portion of each hydraulic rod 230 is fixedly connected to the mounting seat 210 , and a movable portion of each hydraulic rod 230 is fixedly connected to the interception plate 220 .

[0026] It should be noted that when the sedimentation tank 100 is filled with water, the valve 140 is opened to allow the water in the sedimentation tank 100 that has been precipitated to enter the connecting pipe 120. The interception plate 220 located on the water flow path filters out suspended impurities in the water, thereby purifying the water collected in the collection tank 110 so that it can be directly discharged into the municipal rainwater pipe network or used as construction water on the construction site.

[0027] As the interception plate 220 is used for a longer time, the amount of large suspended impurities intercepted by the interception plate 220 will increase, thereby affecting the water flow efficiency of the interception plate 220. Therefore, the interception plate 220 is set to a sliding structure, so that when the suspended impurities accumulated on the interception plate 220 are cleaned, it can also filter the water flow.

[0028] Combined with the above description of the interception mechanism 200, Figure 6 The specific structure of the intercepting plate 220 is further disclosed. The intercepting plate 220 includes a pair of symmetrically arranged grille bodies 221. The two grille bodies 221 are provided with fixing bolts 224 at the ends away from each other. The fixing bolts 224 are fixedly connected to the movable part of the hydraulic rod 230. The grille bodies 221 are provided with collecting grooves 222 on both sides close to the sedimentation tank 100 and the collecting tank 110. A plurality of filter holes 223 are provided on the grille body 221, and the plurality of filter holes 223 are connected to the two collecting grooves 222.

[0029] Therefore, when the suspended impurities gradually increase in the collection tank 222 and affect the water flow efficiency in the water hole 211 (the particle size of these suspended impurities is relatively large, generally larger than the aperture of the filter hole 223, and the suspended impurities will only gather in the collection tank 222 and will not enter the filter hole 223), the hydraulic rod 230 is started, and the grille body 221 located in the mounting seat 210 is driven to slide to the outside through its movable part, so that the workers can clean the suspended impurities accumulated in the collection tank 222. Accordingly, the grille body 221 originally located outside will slide to the inside of the mounting seat 210, and continue to filter the water flow in the connecting pipe 120.

[0030] Furthermore, in the process of the water in the sedimentation tank 100 passing through the connecting pipe 120 and entering the water collection tank 110, the water flow will still contain a small amount of flocculants such as soil particles (the particle size of the soil flocculants carried away by the water flow is generally very small, and their amount is also much reduced compared to before sedimentation). If these soil flocculants stay in the filter holes 223 and accumulate too much, the filter holes 223 will be blocked, affecting the water flow efficiency.

[0031] It is worth noting that before the water inside the water collecting tank 110 is released into the water collecting tank 110, the valve 140 is always in a closed state, and at the same time, the height of the sedimentation tank 100 is higher than the height of the water collecting tank 110. Therefore, when the valve 140 is opened to release the water, when the water at the bottom of the sedimentation tank 100 flows through the connecting hole 150 through the connecting pipe 120, due to the combined effect of the water level pressure difference and the gravitational potential energy, the flow rate of the water flow filter hole 223 will be very fast, which makes the small particles of sediment that may remain in the filter hole 223 be washed away by the high-speed water flow, thereby preventing the filter hole 223 from being blocked.

[0032] Since the original intention of setting the interception plate 220 is to purify the water entering the water collection tank 110 (including two steps of sedimentation and filtration), the water collected in the water collection tank 110 can be directly extracted and discharged to the municipal rainwater pipe network or used as water for construction sites. Although the grille body 221 can filter impurities with larger particles, it cannot intercept impurities with a particle size smaller than the aperture of the filter hole 223. Therefore, the structure of the interception plate 220 is further optimized so that it can intercept impurities with a particle size smaller than the aperture of the filter hole 223, so that the quality of the water collected in the water collection tank 110 is further improved.

[0033] Based on the above explanation of the function of the interception plate 220, combined with Figure 7The mechanism of the interception plate 220 is further described. An arc-shaped baffle plate 225 is provided at the bottom of the collecting tank 222 near the side of the sedimentation tank 100. That is, when the valve 140 is opened to put the water in the sedimentation tank 100 into the connecting pipe 120, the larger flocculent impurities contained in the water are intercepted by the grille body 221 and will not pass through the filter hole 223 (because the particle size of the impurities is larger than the pore size of the filter hole 223).

[0034] In addition, impurities with a particle size smaller than the filter hole 223 are mixed in the water flow. If the adhesion of these impurities is low (such as fine sand particles), they will enter the water collection tank 110 with the water flow and affect the water quality; if the adhesion of these impurities is high (such as flocs of soil and cement), these impurities will accumulate in the filter hole 223, affecting the efficiency of water flow over time. However, after the arc baffle 225 is set, after the water flows through the filter hole 223 of the grille body 221, the impurities with low adhesion will be intercepted by the arc baffle 225 and stay on the inner side of the collection tank 222, waiting for the hydraulic rod 230 to switch the grille body 221 and then clean up the impurities with low adhesion. At the same time, the arc baffle 225 will also guide the water flow to flow back to flush the grille body 221, and flush the impurities with high adhesion originally accumulated in the filter hole 223 back to the side of the collection tank 222 (close to the sedimentation tank 100), thereby ensuring the water flow efficiency of the grille body 221.

[0035] In summary, the working principle of the present invention is as follows: First, the valve 140 is kept in a closed state, and the sediment in the collected water is precipitated through the sedimentation tank 100. As the water level in the sedimentation tank 100 rises, the settleable sediment in the water in the sedimentation tank 100 will gradually settle to the bottom of the sedimentation tank 100. When the connecting pipe 120 is opened after the sedimentation tank 100 is filled with water, water flows from the sedimentation tank 100 through the connecting pipe 120 to the water collection tank 110. When the sediment at the bottom of the sedimentation tank 100 wants to flow with the water flow, the sediment will be hindered by its own gravity, the friction between the sediment and the bottom of the sedimentation tank 100, and the mutual friction between the sediments, so that the sediment stays at the bottom of the sedimentation tank 100, and the amount of sediment that follows the water flow into the water collection tank 110 is minimized.

[0036] When the water after sedimentation in the sedimentation tank 100 enters the connecting pipe 120 , the interception plate 220 located on the water flow path filters out the suspended impurities in the water, thereby purifying the water entering the water collection tank 110 .

[0037] As the interception plate 220 is used for a longer time, the amount of large suspended impurities intercepted by the interception plate 220 will increase, and the water passing efficiency of the interception plate 220 will be affected. Therefore, the hydraulic rod 230 is activated to drive the grille body 221 located in the mounting seat 210 to slide to the outside through its movable part, so that the worker can clean the suspended impurities accumulated in the collection tank 222. Accordingly, the grille body 221 originally located outside will slide to the inside of the mounting seat 210, and continue to filter the water flow in the connecting pipe 120.

[0038] Because the valve 140 is always in a closed state before the water in the water collection tank 110 is put into the water collection tank 110, and the height of the sedimentation tank 100 is higher than the height of the water collection tank 110. Therefore, when the valve 140 is opened to release water, due to the combined effect of the water level pressure difference and the gravitational potential energy, the flow rate of the water flow through the filter hole 223 will be very fast, but the water flow is also mixed with impurities with a particle size smaller than the filter hole 223. If the adhesion of these impurities is low (such as fine sediment particles), they will enter the water collection tank 110 with the water flow and affect the water quality; if the adhesion of these impurities is high (such as soil and cement flocs), these impurities will accumulate in the filter hole 223, affecting the efficiency of water flow over time. However, after the arc baffle 225 is provided, after the water flows through the filter holes 223 of the grille body 221, the impurities with low adhesion will be intercepted by the arc baffle 225 and will remain inside the collecting tank 222, waiting for the hydraulic rod 230 to switch the grille body 221 and then clean up the impurities with low adhesion. At the same time, the arc baffle 225 will also guide the water flow to flow back to flush the grille body 221, and flush the impurities with high adhesion originally accumulated in the filter holes 223 back to one side of the collecting tank 222 (close to the sedimentation tank 100), thereby ensuring the water flow efficiency of the grille body 221.

[0039] It should be noted that for polluted water sources such as rainwater and construction water collected on construction sites that cannot be directly discharged into the municipal rainwater pipe network, after passing through the above-mentioned sedimentation tank 100 to remove settleable sediment, the grille body 221 intercepts large-particle floc impurities (referring to particle size larger than the aperture of the filter hole 223), and the arc-shaped baffle 225 intercepts small-particle flocs and sediment (referring to particle size smaller than the aperture of the filter hole 223), the water quality that finally enters the collection tank 110 has been purified to the greatest extent, and the small amount of impurities still contained therein can be ignored for the water quality requirements for discharge into the municipal rainwater pipe network.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A drainage method for water conservancy project construction, characterized in that: The following steps are involved: S1. The sedimentation module set up in the open air in the low-lying area collects construction water and rainwater on the construction site and precipitates the sediment collected in the water; S2, after the sedimentation module is full of water, the switch provided on the connecting module is turned on to allow the water in the sedimentation module to flow into the sealed water collection module; S2.

1. Construction water on non-rainy days and rainwater at the beginning of rainy days are precipitated in the sedimentation module and then flow into the water collection module; S2.2, after the rainwater in the middle and late rainy days flows into the sedimentation module, it directly passes through the connection module and enters the water collection module; S3, when the water in the sedimentation module passes through the connecting module and enters the water collection module, the interception module arranged on the water flow path filters out the suspended impurities in the water; S4, after the water collection module is full of water, the pumping module pumps out the water that has been precipitated and filtered in the low-lying water collection module; The sedimentation module comprises a sedimentation tank (100), the water collection module comprises a water collection tank (110), a plurality of communication mechanisms are connected between the sedimentation tank (100) and the water collection tank (110), the communication mechanisms comprise two communication holes (150) opened at the same height on the side walls of the sedimentation tank (100) and the water collection tank (110), the communication holes (150) on the side wall of the sedimentation tank (100) are located at the lower part of the sedimentation tank (100), and the side wall of the water collection tank (110) is located at the lower part of the sedimentation tank (100). The connecting hole (150) on the water collecting tank (110) is located at the upper part of the water collecting tank (110), the connecting mechanism also includes a connecting pipe (120) arranged between the two connecting holes (150) on the side walls of the sedimentation tank (100) and the water collecting tank (110), the switch includes a valve (140) arranged on the connecting pipe (120), the pumping module includes a pumping pump group (130) connected to the water collecting tank (110), and the interception module includes an interception mechanism (200) arranged on the connecting pipe (120); The interception mechanism (200) comprises at least an interception plate (220) capable of sliding up and down in the connecting pipe (120); The sedimentation tank (100) is used to precipitate the sediment in the collected water, and the interception mechanism (200) is used to filter the suspended impurities mixed in the water; When suspended impurities accumulate in the interception plate (220), the interception plate (220) slides in the connecting pipe (120), thereby maintaining the filtering effect of the interception plate (220) while removing the accumulated impurities; When water flows through the connecting pipe (120), the gravitational potential energy difference caused by the change in water level can prevent sediment from clogging the interception plate (220), and the interception plate (220) can prevent impurities from entering the water collection tank (110).

2. The drainage method for water conservancy project construction according to claim 1, characterized in that: The height of the bottom of the sedimentation tank (100) gradually decreases from a side close to the connecting hole (150) to a side far from the connecting hole (150).

3. The drainage method for water conservancy project construction according to claim 1, characterized in that: The valve (140) comprises a valve seat connected to the connecting pipe (120), a ball being rotatably connected inside the valve seat, and a flow channel being formed on the ball along a diameter direction parallel to the waterway.

4. The drainage method for water conservancy project construction according to claim 1, characterized in that: The interception mechanism (200) further comprises a mounting seat (210) connected to the connecting pipe (120), the mounting seat (210) being provided with a water hole (211) along the direction of the water flow path, and the interception plate (220) sliding in the mounting seat (210) along a direction perpendicular to the water path.

5. The drainage method for water conservancy project construction according to claim 4, characterized in that: The interception mechanism (200) further comprises a pair of hydraulic rods (230) arranged on both sides of the mounting seat (210), wherein the fixed portion of each hydraulic rod (230) is fixedly connected to the mounting seat (210), and the movable portion of each hydraulic rod (230) is fixedly connected to the interception plate (220).

6. The drainage method for water conservancy project construction according to claim 5, characterized in that: The interception plate (220) comprises a pair of symmetrically arranged grille bodies (221), each of the two grille bodies (221) being provided with a fixing bolt (224) at one end away from each other, the fixing bolt (224) being fixedly connected to a movable portion of a hydraulic rod (230), the grille bodies (221) being provided with collecting grooves (222) on both sides close to the sedimentation tank (100) and the water collection tank (110), the grille bodies (221) being provided with a plurality of filter holes (223), the plurality of filter holes (223) being connected to the two collecting grooves (222).

7. The drainage method for water conservancy project construction according to claim 6, characterized in that: An arc-shaped baffle (225) is provided at the bottom of the collecting tank (222) on one side close to the sedimentation tank (100).

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