An overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and capacity expansion project.

Abstract

This invention discloses an overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and capacity expansion project, relating to the field of hydraulic engineering technology. It includes: an overflow base, with at least two zigzag weir walls fixed to the top of the overflow base; and a filter assembly, comprising a debris-inducing component disposed on the top of the overflow base and two filter return components respectively disposed on both sides of the overflow base. The debris-inducing component is used to introduce impurities in the water flow into the filter return components, and the filter return components are used to separate the introduced impurities from part of the water flow. The debris-inducing component includes a side recess fixed to the top of the overflow base, disposed between the two zigzag weir walls. This invention, through the debris-inducing component, guides impurities in the water flow passing through the zigzag weir walls into the filter return components for filtration, and then the impurities flow out of the filter pool through the return outlet and are discharged back to the overflow base. This avoids the accumulation of impurities such as silt, branches, and garbage in front of the weir, maintaining effective flood control capacity and discharge capacity, and preventing damage to the downstream riverbed and banks from the collapse of accumulated impurities.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, specifically to an overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and capacity expansion project. Background Technology

[0002] A spillway is a water discharge structure built around a reservoir dam. Its main function is to safely and controllably discharge large amounts of floodwater exceeding the design storage level into the downstream river channel, thereby preventing floodwater from overflowing the dam crest and causing a catastrophic dam failure. Simply put, it is like the "outlet" of the reservoir. When the reservoir is "full," the excess water flows out automatically from here, ensuring the safety of the dam. A typical spillway usually consists of an intake channel (intake section), a control section (overflow weir), a spillway (steep channel), energy dissipation facilities (stilling basin, etc.), and a tailrace channel. The overflow weir is the core component of the spillway and is usually the "control section." An overflow weir is often simply called a weir. It is a water-retaining structure that allows water to overflow over its crest. Its core feature is that when the upstream water level exceeds the weir crest elevation, the water will freely flow over the weir crest and downstream. You can think of it as a threshold; when there is little water, it is stored in the threshold, and when there is too much water, it naturally overflows from the threshold.

[0003] A document with publication number CN115434289B discloses an overflow weir structure and its construction method for the outlet of a spillway in a reservoir efficiency enhancement and capacity expansion project. The structure includes a channel consisting of two sidewalls; one end of the channel is the inlet, and the other end is the outlet; the channel has a multi-level stepped structure, with the steps decreasing in height from the inlet to the outlet; each step of the stepped structure has a zigzag-shaped water-retaining wall fixed to its edge. The construction method includes the following steps: S1, casting the stepped structure within the channel and creating a sinking groove along the edge of each step, with bolt holes in the sinking groove; S2, connecting the prefabricated zigzag-shaped water-retaining wall to the sinking groove using bolts, with one side of the bottom edge of the zigzag-shaped water-retaining wall flush with the vertical surface of the step it is connected to, and a grouting gap formed between the other side of the zigzag-shaped water-retaining wall and the sidewall of the sinking groove; S3, filling the grouting gap with concrete to form a concrete sealing layer.

[0004] Trees, garbage, and other debris brought by floods can easily accumulate in front of the overflow weir, causing siltation problems, reducing flood control capacity and discharge capacity. Furthermore, when the blockage is suddenly washed away, the accumulated water and impurities will rush downstream, forming a powerful current that impacts the downstream riverbed and banks, inevitably causing significant damage. The aforementioned overflow weir structure cannot intercept and clear impurities, and cannot reduce or avoid the occurrence of these problems. Summary of the Invention

[0005] The purpose of this invention is to provide an overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and expansion project. This solves the problem that traditional overflow weir structures for the spillway outlet of reservoir efficiency enhancement and expansion projects do not have the function of intercepting and clearing impurities in the water flow. These impurities reduce the effective flood control capacity and discharge capacity, and when the blockage is suddenly washed away later, it will cause great damage to the downstream riverbed and bank slope.

[0006] This invention solves the above-mentioned technical problems through the following technical solution: An overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and capacity expansion project, characterized in that it comprises: An overflow base, the top of which is fixed with at least two zigzag weir walls; The impurity filtration assembly includes an impurity guide disposed on the top of the overflow base and two return filters disposed on both sides of the overflow base. The impurity guide is used to introduce impurities in the water flow into the return filters, and the return filters are used to separate the introduced impurities from a portion of the water flow. The impurity-attracting component includes a side recess fixed to the top of the overflow base. The side recess is disposed between two zigzag weir walls. A support column is fixed to the top of the side recess. An inverted V-shaped drainage channel is fixed to one end of the support column. An inclined wall plate is fixed between the inverted V-shaped drainage channel and one of the zigzag weir walls.

[0007] Preferably, the filter return component includes a filter pool fixed to one side of the overflow base, with an inlet for impurities and an inlet for sand on one side of the filter pool, an outlet for impurities on the inner side of the filter pool, and a return water outlet and an outlet for sand on one side of the filter pool.

[0008] Preferably, the filter pool is provided with two discharge ports. The discharge component includes two first mounting arms and two second mounting arms respectively fixed to the outside of the two discharge ports. A driven roller rotates between the two second mounting arms. A fan blade is provided on one of the first mounting arms. A driving roller rotates between the two first mounting arms. Gear rings are fixed at both ends of the driving roller and both ends of the driven roller. A mesh filter conveying layer is sleeved between the driving roller and the driven roller. Two toothed synchronous belts are fixed on the inner side of the mesh filter conveying layer. The toothed synchronous belts mesh with the gear rings at one end of the driving roller and the gear rings at one end of the driven roller. Unblocking components are provided between the two first mounting arms and between the two second mounting arms.

[0009] Preferably, vertical grooves are provided on both first mounting arms and both second mounting arms. The unblocking component includes a striking bar disposed between the two first mounting arms, two limiting heads, and two co-drive components. The two limiting heads slide in the two vertical grooves respectively, and the two co-drive components are disposed on one side of the two first mounting arms respectively. The co-drive components cause the active roller to drive the striking bar to repeatedly rise and fall when rotating.

[0010] Preferably, an inner groove is provided on one side of the limiting head, and the co-drive component includes a mounting column that rotates on one side of the first mounting arm and a mounting plate fixed to the outer wall of the filter tank. One end of the mounting column is fixedly connected to one end of the drive roller. Gears are rotatably provided on the outer surface of the mounting column and one side of the mounting plate. A toothed synchronous belt is provided between the two gears. A drive head is rotatably provided on the other side of the mounting plate. One end of the drive head is fixedly connected to the gear on the mounting plate through a connecting shaft. A plug-in post is fixed to the other end of the drive head. One end of the plug-in post extends to the inner side of the inner groove. The fan blade is fixedly connected to one end of the mounting column.

[0011] Preferably, the inner wall of the filter tank is provided with a flow channel, and a floating baffle is provided inside the flow channel.

[0012] Preferably, a support roller is rotatably mounted on the inner side of the filter pool, and the support roller passes through the inner side of the mesh filter layer.

[0013] Preferably, a partition plate is fixed to the inner side of the filter pool, and a traction plate is fixed between the partition plate and the bottom of the inner side of the filter pool.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By introducing impurities from the water flowing through the zigzag weir into the filter return section, the impurities are filtered and then flow out of the filter pool through the return outlet and discharged to the overflow base. This prevents impurities such as silt, branches, and garbage from accumulating in front of the weir, thus maintaining effective flood control capacity and discharge capacity, and preventing damage to the downstream riverbed and banks from the accumulation of impurities.

[0015] 2. When the wind blows around the overflow weir, it will drive the fan blades to rotate. The fan blades drive the active roller through the mounting column connected to them. The active roller will drive the mesh filter conveying layer and the driven roller to rotate through the toothed synchronous belt. The mesh filter conveying layer will transfer the impurities accumulated above through the impurity discharge port out of the filter pool, realizing the active discharge and cleaning of impurities.

[0016] 3. After the impurities on the mesh filter conveying layer are discharged from the filter pool, the rotating drive roller and driven roller drive the mounting column, which in turn drives the drive head to rotate through the gear meshing toothed belt. The drive head drives the insertion column to rotate. When the insertion column rotates to the top, it drives the limiting head to slide to the top of the vertical groove. When the insertion column rotates to the bottom, it drives the limiting head to slide to the bottom of the vertical groove. The limiting head drives the striking bar to repeatedly rise and fall vertically, thereby continuously striking the mesh filter conveying layer, shaking out the impurities clogging the mesh, and preventing the mesh from clogging and affecting the subsequent separation and filtration effect of water flow and impurities. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overflow base and zigzag weir wall in this invention; Figure 3 This is a schematic diagram of the filter tank in this invention; Figure 4 for Figure 3 Enlarged diagram of section A in the middle; Figure 5 This is a cross-sectional view of the filter tank in this invention.

[0018] Figure 6 for Figure 5 A breakdown diagram.

[0019] Figure 7 for Figure 6 Enlarged schematic diagram of section B.

[0020] 1. Overflow base; 2. Zigzag weir wall; 3. Filter assembly; 31. Lateral concave body; 32. Support column; 33. Inverted V-shaped diversion channel; 34. Inclined wall panel; 35. Filter pool; 36. Inlet for impurities; 37. Inlet for sand; 38. Return water inlet; 39. Sand discharge inlet; 310. Impurity discharge inlet; 311. Mounting arm; 312. Driven roller; 313. Driven roller; 314. Gear ring; 315. Mesh filter conveying layer; 316. 317. Toothed synchronous belt; 318. Fan blade; 319. Vertical groove; 320. Striking bar; 321. Mounting post; 322. Mounting plate; 323. Inner groove; 324. Gear; 325. Toothed synchronous belt; 326. Drive head; 327. Insertion post; 328. Flow groove; 329. Floating baffle; 330. Support roller; 331. Separator plate; 332. Traction plate; 333. Limiting head; 333. Second mounting arm. Detailed Implementation

[0021] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0022] This invention provides a technical solution: an overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and capacity expansion project, such as... Figure 1-7 As shown, an overflow weir structure for the spillway outlet of a reservoir efficiency enhancement and capacity expansion project includes an overflow base 1 and a filter assembly 3. At least two zigzag weir walls 2 are fixed on the top of the overflow base 1. In this embodiment, two zigzag weir walls 2 are shown. The number of zigzag weir walls 2 can be set according to actual use, but the minimum is two. The filter assembly 3 includes a debriding component set on the top of the overflow base 1 and two filter return components respectively set on both sides of the overflow base 1. If the number of zigzag weir walls 2 is three or four, then a debriding component is set between two adjacent zigzag weir walls 2.

[0023] The impurity guide is used to guide impurities (such as branches or thrown garbage) in the water flowing through the zigzag weir 2 into the filter return component. The impurity guide includes a side recess 31 fixed to the top of the overflow base 1. The side recess 31 is set between two adjacent zigzag weirs 2. The side recess 31 is the highest in the middle and lower on both sides, and is an inclined body that gradually decreases from the middle to both sides. A support column 32 is fixed to the top of the side recess 31. An inverted V-shaped diversion channel 33 is fixed to one end of the support column 32. A filter screen frame is set on the inverted V-shaped diversion channel 33 to prevent impurities flowing into the inverted V-shaped diversion channel 33 from falling directly into the interception range of the next zigzag weir 2 and failing to enter the filter return component by being pulled by the inverted V-shaped diversion channel 33. The number of support columns 32 can be set according to the size of the inverted V-shaped diversion channel 33. An inclined wall plate 34 is fixed between the inverted V-shaped diversion channel 33 and one of the zigzag weirs 2 to smoothly guide the water flow to the inverted V-shaped diversion channel 33.

[0024] The filter element is used to separate introduced impurities and part of the water flow. The filter element includes a filter pool 35 fixed to one side of the overflow base 1. One side of the filter pool 35 has an inlet 36 for impurities and an inlet 37 for sand. The inlet 36 corresponds to one end of the inverted V-shaped guide channel 33. Two discharge components are provided inside the filter pool 35. The discharge components are used to separate the water flow and impurities entering the filter pool 35 through the inverted V-shaped guide channel 33 and discharge the impurities to the outside of the filter pool 35. One side of the filter pool 35 has a return water outlet 38 and a sand discharge outlet 39. Both the return water outlet 38 and the sand discharge outlet 39 are located at the lowest end of the filter pool 35, facing the overflow base. At the bottom 1, the filter pool 35 is provided with a waste discharge port 310. The waste discharge component includes two first mounting arms 311 and two second mounting arms 333 respectively fixed to the outside of the two waste discharge ports 310. A driven roller 312 rotates between the two second mounting arms 333. One of the first mounting arms 311 is provided with a fan blade 317. The fan blade 317 can also be replaced by a variable frequency motor well known to those skilled in the art (the variable frequency motor can be fixed to the outer wall of the filter pool 35 by a support frame, and one end of the output shaft of the variable frequency motor is fixedly connected to one end of the mounting column 320 in one of the co-drive components (that is, the connection with the fan blade 317 shown in this embodiment). One end of the mounting post 320 in one of the co-drive components (not shown in this embodiment) is connected to the variable frequency motor. The number of starts, time, and interval of the variable frequency motor can be set in advance by the operator through the controller. Since the variable frequency motor and the number of starts, time, and interval of the variable frequency motor are existing mature technologies, they will not be described in detail here. Those skilled in the art can select and use them according to actual conditions and needs. An active roller 313 rotates between the two first mounting arms 311, and a support roller 329 rotates inside the filter pool 35. The number of support rollers 329 can be set according to the size of the mesh filter layer 315. The support roller 329 passes through the inner side of the mesh filter conveying layer 315. Gear rings 314 are fixed at both ends of the drive roller 313 and both ends of the driven roller 312. The mesh filter conveying layer 315 for separating impurities and water flow is sleeved between the drive roller 313 and the driven roller 312. Two toothed synchronous belts 316 are fixed on the inner side of the mesh filter conveying layer 315. The toothed synchronous belts 316 mesh with the gear rings 314 at one end of the drive roller 313 and the gear rings 314 at one end of the driven roller 312. Unblocking components are provided between the two first mounting arms 311 and between the two second mounting arms 333 to prevent the mesh filter conveying layer 315 from being blocked.

[0025] Vertical grooves 318 are provided on both first mounting arms 311 and both second mounting arms 333. The unblocking component includes a striking bar 319 disposed between the two first mounting arms 311, two limiting heads 332, and two co-drive components. The striking bar 319 passes through the mesh filter layer 315. The two limiting heads 332 slide in the two vertical grooves 318 respectively. An inner groove 322 is provided on one side of each of the two limiting heads 332. The two co-drive components are respectively disposed on one side of the two first mounting arms 311. The co-drive components cause the driving roller 313 to drive the striking bar 319 to repeatedly rise and fall when rotating. The striking bar 319 in the unblocking component located on the first mounting arm 311 is located between the two first mounting arms 311, and the striking bar 319 located on the second mounting arm 333 is disposed between the two second mounting arms 333.

[0026] The co-drive component includes a mounting post 320 rotating on one side of the first mounting arm 311 and a mounting plate 321 fixed to the outer wall of the filter tank 35. The mounting post 320 in the unblocking component on the first mounting arm 311 is located on one side of the first mounting arm 311, and the mounting post 320 on the second mounting arm 333 is located on one side of the second mounting arm 333. One end of the mounting post 320 passes through the first mounting arm 311 and is fixedly connected to one end of the drive roller 313 through a short shaft. Gears 323 are rotatably mounted on the outer surface of the mounting post 320 and one side of the mounting plate 321. A toothed synchronous belt 324 is meshed between the two gears 323. A drive head 325 is rotatably mounted on the other side of the mounting plate 321. One end of the drive head 325 is fixedly connected to the gear 323 on the mounting plate 321 through a connecting shaft. The other end of the drive head 325 is fixedly attached to an insertion post 326 extending into the inner groove 322. The fan blade 317 is fixedly connected to one end of the mounting post 320 in one of the co-drive components.

[0027] The inner wall of the filter pool 35 is provided with a flow channel 327. The lowest point of the flow channel 327 is above the partition plate 330. A floating baffle 328 is provided inside the flow channel 327. If the water flow into the filter pool 35 is large, the floating baffle 328 will rise under buoyancy, raising the height of the inlet 36 and reducing the water flow through the inlet 36.

[0028] A partition plate 330 is fixed on the inner side of the filter pool 35. The partition plate 330 is located below the mesh filter conveying layer 315 and between the return water port 38 and the sand discharge port 39. A traction plate 331 is fixed between the partition plate 330 and the bottom of the inner side of the filter pool 35. The traction plate 331 is used to form a bend channel in the space of the filter pool 35 below the partition plate 330, so that fine impurities such as mud and sand entering the filter pool 35 will not accumulate in the filter pool 35 and can be smoothly discharged to the bottom of the overflow base 1, and will not accumulate between the two zigzag weir walls 2.

[0029] In use: If the water flow blocked by the zigzag weir 2 at a high position exceeds the height of the zigzag weir 2, it will flow out of the zigzag weir 2. At the same time, impurities floating in the water flow, such as mud, sand, branches and garbage thrown in from outside, will flow down together. The water flow and impurities flowing out of the zigzag weir 2 will fall on the inverted V-shaped diversion channel 33. Some larger impurities and some mud and sand and water flow will be pulled by the inverted V-shaped diversion channel 33 and pass through the impurity inlet 36 into the filter pool 35. Some fine impurities such as mud and sand and water flow will fall directly below the inverted V-shaped diversion channel 33. Under the condition that the sides of the concave body 31 are inclined and in a bottom trend, the mud and sand will be washed by the water flow to both sides of the concave body 31 and enter the filter pool 35 through the sand inlet 37. The water and impurities entering the filter pool 35 through the inlet 36 are separated by the mesh filter conveying layer 315. The impurities flow onto the mesh filter conveying layer 315, while the water flows through the mesh filter conveying layer 315 and falls onto the partition plate 330. The water flows along the inclined direction of the partition plate 330 to the return water outlet 38 and flows out of the filter pool 35. The silt entering the filter pool 35 through the sand inlet 37 will be gradually washed out of the filter pool 35 along the inclined direction of the inner side of the filter pool 35 by the water flow, thus avoiding the accumulation of silt, branches, garbage and other impurities in front of the weir, thereby maintaining effective flood control capacity and discharge capacity, and preventing the damage to the downstream riverbed and bank slope caused by the accumulation of impurities.

[0030] When the wind blows around the overflow weir, it drives the fan blades 317 to rotate. The fan blades 317 then drive the drive roller 313 to rotate via the mounting column 320 connected to them (if a variable frequency motor is used as the drive method, the drive roller 313 can be driven to rotate via the output shaft of the variable frequency motor through the mounting column 320 connected to it). When the drive roller 313 rotates, it drives the mesh filter conveying layer 315 and the driven roller 312 to rotate via the meshing toothed synchronous belt 316. The mesh filter conveying layer 315 rotates the impurities accumulated on it through the impurity discharge port 310 out of the filter pool 35, realizing the active discharge and cleaning of impurities. After the impurities on the mesh filter conveying layer 315 are discharged from the filter pool 35, the drive roller 313 and the driven roller 312... The rotating mounting column 320 drives the drive head 325 to rotate via the gear 323 and the toothed synchronous belt 324. The rotation of the drive head 325 drives the insertion column 326 to rotate. When the insertion column 326 rotates, it slides in the inner groove 322. When the insertion column 326 rotates to the uppermost position, it drives the limiting head 332 to slide to the uppermost position of the vertical groove 318. When the insertion column 326 rotates to the lowermost position, it drives the limiting head 332 to slide to the lowermost position of the vertical groove 318. The limiting head 332 drives the striking bar 319 to repeatedly rise and fall vertically, thereby continuously striking the mesh filter layer 315 to shake out the impurities clogging the mesh and prevent the mesh from clogging and affecting the subsequent separation and filtration effect of water flow and impurities.

[0031] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A spillway structure for the outlet of a spillway in a reservoir efficiency enhancement and capacity expansion project, characterized in that, include: An overflow base (1) is provided, and at least two zigzag weir walls (2) are fixed to the top of the overflow base (1). The impurity filtration assembly (3) includes an impurity guide disposed on the top of the overflow base (1) and two filter return components disposed on both sides of the overflow base (1). The impurity guide is used to introduce impurities in the water flow into the filter return components, and the filter return components are used to separate the introduced impurities and part of the water flow. The impurity-attracting component includes a side recess (31) fixed to the top of the overflow base (1), the side recess (31) being disposed between two zigzag weir walls (2), a support column (32) being fixed to the top of the side recess (31), an inverted V-shaped diversion channel (33) being fixed to one end of the support column (32), and an inclined wall plate (34) being fixed between the inverted V-shaped diversion channel (33) and one of the zigzag weir walls (2).

2. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 1, characterized in that, The filter includes a filter pool (35) fixed to one side of the overflow base (1). The filter pool (35) has an inlet (36) for impurities and an inlet (37) for sand on one side. The filter pool (35) has a discharge device on the inner side. The filter pool (35) has a return water inlet (38) and a discharge sand inlet (39) on one side.

3. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 2, characterized in that, The filter pool (35) is provided with two discharge ports (310). The discharge component includes two first mounting arms (311) and a second mounting arm (333) respectively fixed to the outside of the two discharge ports (310). A driven roller (312) rotates between the two second mounting arms (333). One of the first mounting arms (311) is provided with a fan blade (317). A driving roller (313) rotates between the two first mounting arms (311). The two ends of the driving roller (313) and the driven roller (312) are connected. Both ends of the roller (313) are fixed with gear rings (314). A mesh filter layer (315) is sleeved between the driving roller (313) and the driven roller (312). Two toothed synchronous belts (316) are fixed on the inner side of the mesh filter layer (315). The toothed synchronous belts (316) mesh with the gear rings (314) at one end of the driving roller (313) and the gear rings (314) at one end of the driven roller (312). Unblocking parts are provided between the two first mounting arms (311) and between the two second mounting arms (333).

4. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 3, characterized in that, Vertical grooves (318) are provided on both first mounting arms (311) and both second mounting arms (333). The unblocking component includes a striking bar (319) disposed between the two first mounting arms (311), two limiting heads (332) and two co-drive components. The two limiting heads (332) slide in the two vertical grooves (318) respectively. The two co-drive components are disposed on one side of the two first mounting arms (311). The co-drive components cause the active roller (313) to drive the striking bar (319) to repeatedly rise and fall when rotating.

5. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 4, characterized in that, The limiting head (332) has an inner groove (322) on one side. The co-drive component includes a mounting column (320) rotating on one side of the first mounting arm (311) and a mounting plate (321) fixed to the outer wall of the filter tank (35). One end of the mounting column (320) is fixedly connected to one end of the drive roller (313). Gears (323) are rotatably mounted on the outer surface of the mounting column (320) and on one side of the mounting plate (321). The two gears (323) are... A toothed synchronous belt (324) is provided between the mounting plate (321). A drive head (325) is rotatably mounted on the other side of the mounting plate (321). One end of the drive head (325) is fixedly connected to the gear (323) on the mounting plate (321) via a connecting shaft. The other end of the drive head (325) is fixedly connected to a plug post (326). One end of the plug post (326) extends to the inner side of the inner groove (322). The fan blade (317) is fixedly connected to one end of the mounting post (320).

6. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 2, characterized in that, The inner wall of the filter pool (35) is provided with a flow channel (327), and a floating baffle (328) is provided on the inner side of the flow channel (327).

7. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 3, characterized in that, The filter pool (35) has a support roller (329) rotating inside, which passes through the inner side of the mesh filter layer (315).

8. The overflow weir structure at the spillway outlet of the reservoir efficiency enhancement and capacity expansion project according to claim 2, characterized in that, A partition plate (330) is fixed to the inner side of the filter pool (35), and a traction plate (331) is fixed between the partition plate (330) and the bottom of the inner side of the filter pool (35).

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