A vortex-eliminating and rectifying device with inlet regulation for a pumping station and a vortex-eliminating and rectifying method

Abstract

The present invention discloses a vortex-eliminating and flow-rectifying device with adjustable inlet for a pumping station, which includes a vortex-eliminating and flow-rectifying mechanism arranged in the inlet sump. The vortex-eliminating and flow-rectifying mechanism includes two U-shaped guide grooves, an angle-adjusting assembly, a height-adjusting assembly and a supporting groove. The openings of the two U-shaped guide grooves face each other. A vortex-eliminating plate is slidably clamped between the two U-shaped guide grooves. The output end of the angle-adjusting assembly is connected to the two U-shaped guide grooves and is used to adjust the rotation angle of the two U-shaped guide grooves along the wall surface of the inlet sump. The output end of the height-adjusting assembly is connected to the vortex-eliminating plate and is used to adjust the height of the vortex-eliminating plate located in the U-shaped guide grooves. The supporting groove is fixed at the lower ends of the two U-shaped guide grooves and is used to support the vortex-eliminating plate. By adjusting the arrangement height and angle of the vortex-eliminating plate of the vortex-eliminating and flow-rectifying mechanism, the present invention effectively eliminates the inlet backflow and vortices under different operating conditions of the pumping station, adjusts the flow pattern of the inlet water flow, and improves the uniformity of the water flow entering the pump and the stability of the operation of the pumping station.

Description

Technical Field

[0001] The present invention relates to the technical field of pumping station engineering, and specifically to a vortex-eliminating and flow-rectifying device with adjustable inlet for a pumping station and a vortex-eliminating and flow-rectifying method. Background Art

[0002] Pumping station engineering is an important part of water conservancy projects and is one of the effective engineering measures to solve the three major water resource problems of drought and water shortage, flood disasters, and water environment deterioration. The inlet structure of a pumping station includes a forebay and an intake sump, aiming to create good inlet conditions for the water pump to intake water. In actual pumping station projects, due to seasonal precipitation, the construction environment of water conservancy projects, the technical transformation of pumping stations, or reasons such as a short forebay with a large diffusion angle, the inlet conditions of the inlet structure have changed, causing adverse flow patterns such as vortices and backflows in the forebay and intake sump, resulting in the inlet flow pattern not meeting the water intake requirements of the water pump, causing adverse consequences to the water intake of the water pump, leading to a decrease in the efficiency of the water pump, an increase in energy consumption, and in severe cases, cavitation, vibration, and noise hazards of the water pump, which have a great impact on the normal, efficient, and safe operation of the water pump.

[0003] The adverse flow patterns in the forebay and intake sump are mainly caused by vortices. Classified by the position where the vortices occur, the vortices can be divided into two types: surface vortices and underwater vortices. At present, corresponding specific vortex-eliminating and flow-rectifying measures have been proposed for the two types of vortices generated by pumping stations: for example, using guide piers, columns, etc. to adjust the water flow distribution in the forebay before water intake; using underwater covers, above-water covers, etc. to eliminate surface vortices; using water guide cones, flow deflecting weirs, bottom weirs, cross vortex-eliminating plates, etc. to eliminate underwater vortices. Practical applications have proved that these flow-rectifying measures can effectively improve the water flow pattern at the inlet of the pumping station.

[0004] For surface vortices, they are divided into 6 types. Among them, type I and type II vortices have little impact on the performance of the water pump, and are allowed to exist in engineering without any danger to the project. Type III and type IV vortices will cause harm to the project and belong to medium-strength vortices. Vortices above type V are strong vortices when the strength is large and will cause serious harm to the project and are not allowed to exist in engineering. Therefore, for pumping stations with a large variation range of inlet water level or a large variation in inlet water flow velocity, these specific flow-rectifying measures can no longer achieve good vortex-eliminating and flow-rectifying effects. Especially when there are large backflows and strong vortices at the end of the forebay, the inlet flow pattern becomes very disordered, making it difficult to effectively improve the adverse flow patterns in the forebay and intake sump. Summary of the Invention

[0005] The purpose of the present invention is to provide a vortex-eliminating and flow-rectifying device with adjustable inlet for a pumping station and a vortex-eliminating and flow-rectifying method. By adjusting the arrangement height and angle of the vortex-eliminating plate in the vortex-eliminating and flow-rectifying mechanism, it can effectively eliminate the inlet backflow and vortices under different operating conditions of the pumping station, adjust the inlet water flow pattern, and improve the uniformity of water flow into the pump and the stability of the operation of the pumping station.

[0006] The technical solution of the present invention is: a vortex-eliminating and rectifying device for regulating the water inlet of a pumping station, which includes a vortex-eliminating and rectifying mechanism arranged in the water inlet pool. The vortex-eliminating and rectifying mechanism includes two U-shaped guide grooves, an angle-adjusting component, a height-adjusting component, and a supporting groove; the openings of the two U-shaped guide grooves are arranged facing each other, and a vortex-eliminating plate is slidably clamped between the two U-shaped guide grooves; the output end of the angle-adjusting component is connected to the two U-shaped guide grooves for adjusting the rotation angle of the two U-shaped guide grooves along the wall surface of the water inlet pool; the output end of the height-adjusting component is connected to the vortex-eliminating plate for adjusting the height of the vortex-eliminating plate in the U-shaped guide groove; the supporting groove is fixed at the lower ends of the two U-shaped guide grooves for supporting the vortex-eliminating plate.

[0007] Preferably, a partition pier is arranged in the water inlet pool. The partition pier is arranged along the length direction of the water inlet pool, and the length of the partition pier is the same as the length of the water inlet pool. The partition pier divides the water inlet pool into two equal regions, and a vortex-eliminating and rectifying mechanism is arranged in each region.

[0008] Preferably, the angle-adjusting component includes two rotating shafts and two connecting components; the two rotating shafts are respectively fixed on the outer side walls of the bottoms of the two U-shaped guide grooves, and the other ends of the two rotating shafts are respectively rotatably connected to the wall surface of the partition pier and the wall surface of the water inlet pool; the lengths of the two connecting components are adjustable and are correspondingly arranged on the two U-shaped guide grooves. One connecting component is connected to the upper part of the U-shaped guide groove and the upper side of the wall surface of the water inlet pool, and the other connecting component is connected to the upper part of the U-shaped guide groove and the upper side of the wall surface of the partition pier. By adjusting the length of the connecting component, the vortex-eliminating plate and the U-shaped guide groove can rotate counterclockwise within 0° to 90° around the rotating shaft.

[0009] Preferably, the connecting component is a plurality of connecting rods with different lengths, and hanging rings are fixed at both ends of each connecting rod. A first hook is fixed at the upper part of each U-shaped guide groove, and a second hook is fixed at the upper side of the wall surface of the partition pier and the upper side of the wall surface of the water inlet pool.

[0010] Preferably, the vortex-eliminating plate includes a rectangular steel plate and steel plate tie rods arranged on both sides of the rectangular steel plate. The two steel plate tie rods are correspondingly slidably clamped in the two U-shaped guide grooves.

[0011] Preferably, the height-adjusting component includes a plurality of U-shaped guide groove locking holes, a plurality of lifting locking holes, and a locking pin insert; the plurality of U-shaped guide groove locking holes are opened on the inner wall of the opening of the U-shaped guide groove and are evenly distributed along the height direction of the U-shaped guide groove; the plurality of lifting locking holes are opened on the steel plate tie rod and are evenly distributed along the height direction of the steel plate tie rod; the locking pin insert is used to pass through the U-shaped guide groove locking hole and the lifting locking hole and then lock them.

[0012] Preferably, a lifting hole for the vortex-eliminating plate is fixed at the top of the steel plate tie rod.

[0013] Preferably, a gate is provided in the intake pool, and the gate is located at the rear side of the vortex elimination and rectification mechanism.

[0014] The present invention also provides a vortex elimination and rectification method, which is completed by using the above-mentioned pump station intake regulating vortex elimination and rectification device, and includes the following steps:

[0015] S1. Under the conditions of type III vortex and type IV vortex, adjust the rotation angle of the U-shaped guide groove in the vortex elimination and rectification mechanism along the wall surface of the intake pool to 0° - 45°, and at the same time adjust the upper edge of the vortex elimination plate to be 5 cm - 15 cm lower than the intake water level. Affected by the velocity gradient and the side wall, the incoming water flow forms water flows with different degrees of circulation and entrained vortexes to the vortex elimination and rectification mechanism. After passing through the vortex elimination plate, the flow pattern of the water flow is redistributed, and most of the vortexes are eliminated, and the water flow smoothly enters the intake pool;

[0016] S2. Under the conditions above type V vortex, adjust the rotation angle of the U-shaped guide groove in the vortex elimination and rectification mechanism along the wall surface of the intake pool to 45° - 90°, and at the same time adjust the upper edge of the vortex elimination plate to be the same as the intake water level or 5 cm higher than the intake water level. The water flow with strong intermittent suction vortexes or continuous suction vortexes flows to the vortex elimination and rectification mechanism. After passing through the vortex elimination plate, the continuity of the formed vortex is destroyed and divided into upper and lower parts. The upper part of the water flow forms a post-plate vortex after passing through the vortex elimination and rectification mechanism, eliminating the residual energy in the water flow, and the lower part of the water flow stably and uniformly enters the intake pool.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The pump station intake regulating vortex elimination and rectification mechanism of the present invention optimizes the traditional fixed-arrangement vortex elimination and rectification mechanism. In view of the complex incoming water flow characteristics of the pump station operation, by adjusting the arrangement height and angle of the vortex elimination plate in the vortex elimination and rectification mechanism, it can effectively eliminate the incoming water backflow and vortexes under different operating conditions of the pump station, achieve an ideal vortex elimination and rectification effect, provide a stable water flow pattern for the intake pool, thus ensuring that the water pump has good water intake conditions, and further improving the uniformity of the water flow into the pump and the stability of the pump station operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a top view structural schematic diagram of the present invention;

[0020] Figure 2 is the present invention Figure 1 a cross-sectional structural schematic diagram at A-A in;

[0021] Figure 3 is a structural schematic diagram when the vortex elimination plate in the present invention rotates to 90°

[0022] Figure 4 is a side view structural schematic diagram of the vortex elimination plate in the present invention;

[0023] Figure 5 Front view structural schematic diagram of the vortex elimination plate in the present invention

[0024] Figure 6 Side view structural schematic diagram of the U-shaped guide groove in the present invention;

[0025] Figure 7 Front view structural schematic diagram of the U-shaped guide groove in the present invention.

[0026] Explanation of reference numerals in the drawings:

[0027] 1. Diversion channel; 2. Forebay; 3. Intake sump; 4. Inlet pipe; 5. Inlet bellmouth; 6. Vortex elimination and rectification mechanism; 7. Gate; 8. Pier; 9. Lift locking hole; 10. Vortex elimination plate; 11. U-shaped guide groove; 12. Rotating shaft; 13. Hoisting hole for vortex elimination plate; 14. Connecting component; 15. Steel plate tie rod; 16. Steel plate; 17. Locking hole for U-shaped guide groove; 18. Support groove. Detailed implementation manners

[0028] The following combines the attached Figure 1 to the attached Figure 7 to describe the detailed implementation manners of the present invention in detail. In the description of the invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; in the description of the invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0030] Embodiment 1

[0031] As Figure 1As shown in the figure, an inlet regulating vortex-eliminating and flow-rectifying device for a pumping station according to an embodiment of the present invention includes an inlet sump 3 and a vortex-eliminating and flow-rectifying mechanism 6 disposed in the inlet sump 3. The vortex-eliminating and flow-rectifying mechanism 6 includes two U-shaped guide grooves 11, an angle adjusting component, a height adjusting component, and a support groove 18. The openings of the two U-shaped guide grooves 11 face each other. A vortex-eliminating plate 10 is slidably clamped between the two U-shaped guide grooves 11. The output end of the angle adjusting component is connected to the two U-shaped guide grooves 11 for adjusting the rotation angle of the two U-shaped guide grooves 11 along the wall surface of the inlet sump 3. The output end of the height adjusting component is connected to the vortex-eliminating plate 10 for adjusting the height of the vortex-eliminating plate 10 located in the U-shaped guide grooves 11. The support groove 18 is fixed to the lower ends of the two U-shaped guide grooves 11 for supporting the vortex-eliminating plate 10.

[0032] Wherein, a diversion channel 1 and a forebay 2 are respectively provided on the front side of the inlet sump 3. An inlet device for supplying water to the water pump composed of a water inlet pipe 4 and a water inlet bellmouth 5 is placed in the inlet sump 3.

[0033] In this embodiment, the water flow with vortices enters the inlet sump 3 through the diversion channel 1 and the forebay 2. Since the height and the rotation angle along the wall surface of the inlet sump 3 of the vortex-eliminating and flow-rectifying mechanism 6 are adjustable, by adjusting the different heights and angles of the vortex-eliminating and flow-rectifying mechanism 6, the adverse water flow patterns under different operating conditions can be adjusted, ensuring good water flow characteristics in the inlet sump 3, and further ensuring good water inlet conditions for the water pump.

[0034] Embodiment 2

[0035] Based on Embodiment 1, this embodiment defines the specific structure of the angle adjusting component, as Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 shown. The angle adjusting component includes two rotating shafts 12 and two connecting components 14. The two rotating shafts 12 are respectively fixed on the outer side walls of the bottoms of the two U-shaped guide grooves 11. The other ends of the two rotating shafts 12 are respectively rotatably connected to the wall surface of the pier 8 and the wall surface of the inlet sump 3. The lengths of the two connecting components 14 are adjustable and are respectively connected to the upper parts of the two U-shaped guide grooves 11 and the upper ends of the wall surfaces of the pier 8.

[0036] When adjusting the rotation angle of the vortex-eliminating and flow-rectifying mechanism 6 along the wall surface of the pier 8 and the wall surface of the inlet sump 3 through the angle adjusting component, by adjusting the lengths of the connecting components 14 connected to the U-shaped guide grooves 11 and the pier 8, the vortex-eliminating plate 10 and the U-shaped guide grooves 11 can rotate arbitrarily in the range of 0 to 90° counterclockwise with the rotating shaft 12 as the center, enabling the vortex-eliminating plate 10 to freely rotate around the rotating shaft 12.

[0037] Further, the connecting component 14 is a plurality of connecting rods with different lengths, and hanging rings are fixed at both ends of each connecting rod. First hooks are fixed at the upper parts of each U-shaped guide groove 11, and second hooks are fixed at the upper sides of the walls of the pier 8 and the water inlet tank 3.

[0038] When adjusting the angle between the vortex elimination plate 10 and the U-shaped guide groove 11 by adjusting the length of the connecting component 14 itself, first rotate the vortex elimination plate 10 and the U-shaped guide groove 11 to the required angle, then take out two connecting rods with corresponding lengths, and connect the hanging rings at both ends of one connecting rod to the first hook on the U-shaped guide groove 11 outside the vortex elimination plate 10 and the second hook arranged on the upper side of the wall of the water inlet tank 3 respectively. Connect the hanging rings at both ends of the other connecting rod to the first hook on the U-shaped guide groove 11 inside the vortex elimination plate 10 and the second hook arranged on the upper side of the wall of the pier 8 respectively.

[0039] Embodiment 3

[0040] On the basis of Embodiment 2, in order to be able to replace the vortex elimination plate 10 at any time, the vortex elimination plate 10 includes a rectangular steel plate 16 and steel plate tie rods 15 arranged on both sides of the rectangular steel plate 16. The two steel plate tie rods 15 are correspondingly slidably clamped in the two U-shaped guide grooves 11. Among them, the length of the vortex elimination plate 10 is determined according to the width of the unit water inlet interval, and the height is determined according to the actual vortex elimination and rectification effect.

[0041] Embodiment 4

[0042] On the basis of Embodiment 3, the specific structure of the height adjustment component is defined, as Figures 4 to 7 shown, the height adjustment component includes a plurality of U-shaped guide groove locking holes 17, a plurality of lifting locking holes 9 and a locking pin insert. The plurality of U-shaped guide groove locking holes 17 are opened on the inner wall of the opening of the U-shaped guide groove 11 and are evenly distributed along the height direction of the U-shaped guide groove 11. The plurality of lifting locking holes 9 are opened on the steel plate tie rod 15 and are evenly distributed along the height direction of the steel plate tie rod 15. The locking pin insert is used for locking after passing through the U-shaped guide groove locking hole 17 and the lifting locking hole 9.

[0043] Further, in order to facilitate the movement and adjustment of the position of the steel plate tie rod 15, a vortex elimination plate lifting hole 13 is fixed at the top of the steel plate tie rod 15, and the position of the steel plate tie rod 15 is moved and adjusted by connecting the steel wire rope on the external crane to the vortex elimination plate lifting hole 13.

[0044] When adjusting the height of the vortex elimination plate 10 located in the U-shaped guide groove 11 through the height adjustment component, by moving the vortex elimination plate 10, a crane is used to control the lifting height of the vortex elimination plate 10 through the lifting hole 13 of the vortex elimination plate. And there are scale marks on the steel plate tie rod 15 for indicating the lifting height. After the installation height is determined, the locking pin is inserted into the guide groove locking hole and the lifting locking hole 9, then the vortex elimination plate 10 can be fixed on the U-shaped guide groove 11, and the entire vortex elimination and rectification mechanism 11 is fixed on the pier 8 through the U-shaped guide groove 11 and the connection component 14 on the pier 8.

[0045] Furthermore, a gate 7 is provided in the intake basin 3, and the gate 7 is located at the rear side of the vortex elimination and rectification mechanism 6.

[0046] The installation process of the present invention is as follows:

[0047] First, the U-shaped guide groove 11 should be installed in front of the gate 7. The lower end of the U-shaped guide groove 11 should be placed below the actual lowest water level of the pump station intake basin and fixed at the wall surfaces of the pier 8 and the intake basin 3 through the rotating shaft 12. When the U-shaped guide groove 11 rotates to be perpendicular to the wall surface of the pier 8, the upper end is fixed on the pier 8 through the connecting rod to keep the U-shaped guide groove 11 in a vertical state. Then, the crane hoists the vortex elimination plate 10 along the U-shaped guide groove 11 through the lifting hole 13 of the vortex elimination plate, and controls the installation height of the vortex elimination plate 10 according to the scale marks on the steel plate tie rod 15. After the installation height is determined, the locking pin is inserted into the guide groove locking hole 17 and the lifting locking hole 9 to fix the vortex elimination plate 10 on the U-shaped guide groove 11.

[0048] Embodiment 5

[0049] This embodiment discloses a vortex elimination and rectification method, which is completed by using the above-mentioned pump station intake adjustment type vortex elimination and rectification device, and includes the following steps:

[0050] S1. Under the conditions of type III vortices and type IV vortices, adjust the rotation angle of the U-shaped guide groove 11 along the wall surface of the intake basin 3 in the vortex elimination and rectification mechanism 6 to be 0° to 45°, and at the same time adjust the upper edge of the vortex elimination plate 10 to be 5 cm to 15 cm lower than the intake water level. Affected by the velocity gradient and the side wall, the incoming water flow forms water flows with different degrees of circulation and entrained vortices to the vortex elimination and rectification mechanism 6. After passing through the vortex elimination plate 10, the flow pattern of the water flow is redistributed, and most of the vortices are eliminated, and the water flow smoothly enters the intake basin 3.

[0051] S2. Under the condition above the V-shaped vortex, adjust the rotation angle of the U-shaped guide groove 11 on the vortex-eliminating and flow-rectifying mechanism 6 along the wall surface of the intake basin 3 to 45°-90°. At the same time, adjust the upper edge of the vortex-eliminating plate 10 to be the same as the intake water level or about 5 cm higher than the intake water level. The water flow of the intermittent suction vortex or continuous suction vortex with high intensity flows to the vortex-eliminating and flow-rectifying mechanism 6. After passing through the vortex-eliminating plate 10, the continuity of the vortex formation is destroyed and it is divided into upper and lower parts. The upper water flow forms a post-plate vortex after passing through the vortex-eliminating and flow-rectifying mechanism 6, eliminating the residual energy in the water flow, and the lower water flow stably and evenly enters the intake basin 3.

[0052] The above-disclosed are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A vortex-eliminating and rectifying device with adjustable intake for a pumping station, characterized in that, Including: A partition pier (8) is arranged in the intake sump (3) along the length direction of the intake sump (3). The length of the partition pier (8) is the same as that of the intake sump (3). The partition pier (8) divides the intake sump (3) into two equal regions, and a vortex dissipation and flow rectification mechanism (6) is arranged in each region. The vortex dissipation and flow rectification mechanism (6) includes: Two U-shaped guide grooves (11) with their openings facing each other. A vortex dissipation plate (10) is slidably clamped between the two U-shaped guide grooves (11). The vortex dissipation plate (10) includes a rectangular steel plate (16) and steel plate tie rods (15) arranged on both sides of the rectangular steel plate (16). The two steel plate tie rods (15) are correspondingly slidably clamped in the two U-shaped guide grooves (11). An angle adjustment component, whose output end is connected to the two U-shaped guide grooves (11) for adjusting the rotation angle of the two U-shaped guide grooves (11) along the wall surface of the intake sump (3). The angle adjustment component includes: two rotating shafts (12) respectively fixed on the outer bottom walls of the two U-shaped guide grooves (11), and the other ends of the two rotating shafts (12) are respectively rotatably connected to the wall surface of the partition pier (8) and the wall surface of the intake sump (3); two connection components (14) with adjustable lengths, correspondingly arranged on the two U-shaped guide grooves (11). One connection component (14) is connected to the upper part of the U-shaped guide groove (11) and the upper side of the wall surface of the intake sump (3), and the other connection component (14) is connected to the upper part of the U-shaped guide groove (11) and the upper side of the wall surface of the partition pier (8). By adjusting the length of the connection component (14), the vortex dissipation plate (10) and the U-shaped guide groove (11) rotate counterclockwise within 0° to 90° with the rotating shaft (12) as the center. A height adjustment component, whose output end is connected to the vortex dissipation plate (10) for adjusting the height of the vortex dissipation plate (10) located in the U-shaped guide groove (11). The height adjustment component includes: a plurality of U-shaped guide groove locking holes (17) opened on the inner wall of the opening of the U-shaped guide groove (11) and uniformly arranged along the height direction of the U-shaped guide groove (11); a plurality of lifting locking holes (9) opened on the steel plate tie rod (15) and uniformly arranged along the height direction of the steel plate tie rod (15); a locking pin for passing through the U-shaped guide groove locking hole (17) and the lifting locking hole (9) for locking. A support groove (18) is fixed at the lower ends of the two U-shaped guide grooves (11) for supporting the vortex dissipation plate (10).

2. The vortex elimination and rectification device with inlet regulation for a pumping station according to claim 1, characterized in that, The connection component (14) is a plurality of connecting rods with different lengths, and hanging rings are fixed at both ends of each connecting rod. A first hook is fixed at the upper part of each U-shaped guide groove (11), and a second hook is fixed at the upper side of the wall surface of the partition pier (8) and the upper side of the wall surface of the intake sump (3).

3. A vortex-eliminating and rectifying device with adjustable inlet for a pumping station according to claim 1, characterized in that, A vortex dissipation plate lifting hole (13) is fixed at the top of the steel plate tie rod (15).

4. A vortex-eliminating and rectifying device with adjustable intake for a pumping station according to claim 1, characterized in that, A gate (7) is arranged in the intake sump (3), and the gate (7) is located at the rear side of the vortex dissipation and flow rectification mechanism (6).

5. A vortex elimination and rectification method, characterized in that, Completed by using the pump station intake regulating vortex dissipation and flow rectification device according to any one of claims 1 - 4, including the following steps: S1. Under the conditions of type III vortex and type IV vortex, adjust the rotation angle of the U-shaped guide groove (11) in the vortex-eliminating and flow-rectifying mechanism (6) along the wall surface of the intake basin (3) to be 0° to 45°. At the same time, adjust the upper edge of the vortex-eliminating plate (10) to be 5 cm to 15 cm below the intake water level. Affected by the velocity gradient and the side wall, the incoming water flow forms water flows with different degrees of circulation and entrained vortices and reaches the vortex-eliminating and flow-rectifying mechanism (6). After passing through the vortex-eliminating plate (10), the flow pattern of the water flow is redistributed, and most of the vortices are eliminated, and the water flow smoothly enters the intake basin (3). S2. Under the conditions above type V vortex, adjust the rotation angle of the U-shaped guide groove (11) in the vortex-eliminating and flow-rectifying mechanism (6) along the wall surface of the intake basin (3) to be 45° to 90°. At the same time, adjust the upper edge of the vortex-eliminating plate (10) to be the same as the intake water level or 5 cm higher than the intake water level. The water flow with strong intermittent suction vortices or continuous suction vortices reaches the vortex-eliminating and flow-rectifying mechanism (6). After passing through the vortex-eliminating plate (10), the continuity of the formed vortices is destroyed and divided into upper and lower parts. The upper water flow forms vortices behind the plate after passing through the vortex-eliminating and flow-rectifying mechanism (6) to eliminate the residual energy in the water flow, and the lower water flow stably and evenly enters the intake basin (3).

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