Enhanced stilling pool aeration device

Abstract

The utility model discloses an enhanced stilling pool aeration device which comprises a stilling pool bottom plate, one side of the stilling pool bottom plate is connected with a release structure bottom plate, the side edges of the stilling pool bottom plate and the release structure bottom plate are jointly provided with a side wall, and the stilling pool bottom plate is provided with a rotating device and a guide ridge. According to the device for enhancing aeration of the stilling pool, the principle that water flow kinetic energy is converted into mechanical energy is utilized, the air suction fan is driven to rotate to enable air to be sucked into the air inlet hole, the air is conveyed to the portion, needing key aeration, of the stilling pool through the air conveying pipe, and the purpose of enhancing aeration of the stilling pool is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower, and particularly relates to an aeration device for enhancing a stilling basin. Background Art

[0002] Bottom flow energy dissipation means that a stilling basin is arranged downstream of a water discharge structure so that the flow energy is consumed through rolling, aeration and friction. A tail sill and stilling piers can be arranged in the stilling basin to further enhance the energy dissipation effect, which is one of the most commonly used energy dissipation methods in water conservancy and hydropower projects.

[0003] It has been found in the completed projects that cavitation damage is likely to occur at the entrance of the stilling basin, the side walls of the auxiliary stilling piers, the downstream side of the tail sill and the bottom slab of the stilling basin. Research shows that when the aeration concentration reaches 3%, cavitation damage can be effectively improved, and when the aeration concentration reaches 7%, cavitation damage can be avoided. However, it is not easy to aerate the stilling basin. Only relying on the self-aeration of the flow rolling in the stilling basin, the aeration effect is poor. Especially, the aeration concentration at the bottom slab of the stilling basin is less than 1%. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an aeration device for enhancing a stilling basin, which solves the problem of poor aeration effect existing in the prior art that relies on the self-aeration of the flow rolling in the stilling basin.

[0005] The technical solution adopted by the utility model is that the aeration device for enhancing a stilling basin includes a bottom slab of the stilling basin. One side of the bottom slab of the stilling basin is connected to a bottom slab of a water discharge structure. Side walls are jointly arranged on the side edges of the bottom slab of the stilling basin and the bottom slab of the water discharge structure. A rotating device and a guide sill are arranged on the bottom slab of the stilling basin.

[0006] The utility model is further characterized in that:

[0007] A tail sill and stilling piers are arranged on the bottom slab of the stilling basin. The tail sill is arranged at the end of the bottom slab of the stilling basin, and the stilling piers are arranged between the rotating device and the tail sill.

[0008] The rotating device is arranged close to the bottom slab of the water discharge structure. The guide sill is arranged on the side of the rotating device close to the bottom slab of the water discharge structure, and the guide sill is provided with a slope.

[0009] The rotating device includes a shaft body, blades and a driving shaft. The blades are arranged around the outer side of the shaft body, and the driving shaft is arranged at both ends of the shaft body.

[0010] Air inlet holes are vertically formed in the side walls. The air inlet holes are formed close to the driving shaft, and suction fans are arranged in the air inlet holes.

[0011] Exhaust holes are formed in the tail sill, the stilling piers and the side walls of the side walls. The exhaust holes are communicated with the air inlet holes through air pipes.

[0012] A driven shaft is arranged at the center of the suction fan, and the driven shaft is connected with a speed-changing gear.

[0013] The transmission gear includes a driving bevel gear and a driven bevel gear. The driving bevel gear is fixed on the driving shaft, and the driven bevel gear is fixed on the driven shaft.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The air entrainment device for enhancing the energy dissipation pool of the present utility model utilizes the principle of converting the kinetic energy of water into mechanical energy to drive the suction fan to rotate, so that air is sucked into the air inlet hole and is transported to the parts of the energy dissipation pool that need to be aerated through the air delivery pipe, achieving the purpose of enhancing the aeration of the energy dissipation pool and effectively reducing or avoiding the cavitation damage of the energy dissipation pool. At the same time, the rotating device also acts as an energy dissipation pier and can play a role in assisting energy dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the air entrainment device for enhancing the energy dissipation pool of the present utility model;

[0017] Figure 2 is a top view schematic of the air entrainment device for enhancing the energy dissipation pool of the present utility model;

[0018] Figure 3 is a bottom view schematic of the air entrainment device for enhancing the energy dissipation pool of the present utility model;

[0019] Figure 4 is a schematic structural view of the transmission gear of the present utility model;

[0020] In the figure, 1. energy dissipation pool bottom slab; 2. bottom slab of the water discharge structure; 3. side wall; 4. end sill; 5. energy dissipation pier; 6. rotating device, 61. shaft body, 62. blade, 63. driving shaft; 7. guide sill; 8. air inlet hole; 9. suction fan, 91. driven shaft; 10. exhaust hole; 11. air delivery pipe; 12. transmission gear, 121. driving bevel gear, 122. driven bevel gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments.

[0022] The present utility model provides an air entrainment device for enhancing the energy dissipation pool, as shown in Figure 1 and 2As shown in the figure, it includes the stilling basin floor slab 1. One side of the stilling basin floor slab 1 is connected to the discharge structure floor slab 2. Side walls 3 are jointly arranged on the sides of the stilling basin floor slab 1 and the discharge structure floor slab 2. A rotating device 6 and a guide sill 7 are arranged on the stilling basin floor slab 1. A tail sill 4 and stilling blocks 5 are arranged on the stilling basin floor slab 1. The tail sill 4 is arranged at the end of the stilling basin floor slab 1, and the stilling blocks 5 are arranged between the rotating device 6 and the tail sill 4. The rotating device 6 is arranged near the discharge structure floor slab 2, and the guide sill 7 is arranged on the side of the rotating device 6 close to the discharge structure floor slab 2. The guide sill 7 has a slope. The rotating device 6 includes a shaft body 61, blades 62 and a driving shaft 63. The blades 62 surround the outside of the shaft body 61, and the driving shaft 63 is arranged at both ends of the shaft body 61. Air inlet holes 8 are vertically opened on the side walls 3, and the air inlet holes 8 are opened near the driving shaft 63. A suction fan 9 is arranged in the air inlet holes 8. Exhaust holes 10 are opened on the side walls of the tail sill 4, the stilling blocks 5 and the side walls 3, and the exhaust holes 10 are communicated with the air inlet holes 8 through an air duct 11. A driven shaft 91 is arranged at the center of the suction fan 9, and the driven shaft 91 is connected with a speed-changing gear 12. The speed-changing gear 12 includes a driving bevel gear 121 and a driven bevel gear 122. The driving bevel gear 121 is fixed on the driving shaft 63, and the driven bevel gear 122 is fixed on the driven shaft 91.

[0023] Among them, as Figure 1 shown, three layers of suction fans 9 are arranged on the driven shaft 91. To further increase the air intake volume, more layers of suction fans 9 can also be arranged.

[0024] Among them, as Figure 3 shown, the elevation of the stilling basin floor slab 1 is lower than the elevation of the end of the discharge structure floor slab 2, so that the water flow enters the stilling basin and forms a cavity here, which is more conducive to air entrainment. The tail sill 4 is located at the end of the stilling basin, the stilling blocks 5 are located at the 2 / 3 position of the stilling basin, and the rotating device 6 is located at the 1 / 3 position of the stilling basin.

[0025] The tail sill 4 and the stilling blocks 5 are not necessarily arranged. The function of the two is to increase the energy dissipation effect of the stilling basin. Whether to arrange them specifically is designed according to the energy dissipation effect. Whether there are the tail sill 4 and the stilling blocks 5 does not affect the implementation of the air entrainment device for enhancing the stilling basin of the present invention.

[0026] Among them, as Figure 3 shown, a part of the rotating device 6 is embedded in the stilling basin floor slab 1, and a part is located on the stilling basin floor slab 1, and it rotates by the impact of the water flow on the blades 62.

[0027] It should be noted that the part of the rotating device 6 embedded in the stilling basin floor slab 1 should not be less than 1 / 2 of the rotating device 6, so that the water flow impacts the upper blades and drives the rotating device to rotate in the direction of the water flow.

[0028] Among them, as Figure 3As shown, the guide sill 7 is arranged on the upstream side of the rotating device with a slope of 1:10. Its purpose is to prevent the water flow from hitting the shaft body 61, so that the water flow hits the upper blade 62, thereby driving the shaft body 61 to rotate in the direction of the water flow.

[0029] As Figure 4 shown, the driving bevel gear and the driven bevel gear are engaged and driven through saw teeth. The radius of the driving bevel gear is larger than that of the driven bevel gear, so as to achieve the effect of accelerating the rotation speed of the driven shaft.

[0030] The enhanced energy dissipation pool aeration device provided by the present embodiment is specifically implemented as follows: The high-speed water flow flows from the bottom plate 2 of the water discharge structure to the bottom plate 1 of the energy dissipation pool; the water flow hits the blade 62 through the guide sill 7, and part of the kinetic energy is converted into mechanical energy, driving the shaft body 61 to rotate; the shaft body 61 rotates, and the driven shaft 91 is accelerated to rotate through the speed-changing gear 12; the rotation of the driven shaft 91 drives the suction fan 9 to rotate, and the rotation of the suction fan causes air to be sucked into the air inlet hole 8; the sucked air is transmitted through the air delivery pipe 11 and discharged from the exhaust hole 10 to reach the parts of the energy dissipation pool that need to be aerated.

[0031] Embodiment 1

[0032] The present embodiment provides an enhanced energy dissipation pool aeration device. As Figures 1-4 shown, it includes the bottom plate 1 of the energy dissipation pool. One side of the bottom plate 1 of the energy dissipation pool is connected to the bottom plate 2 of the water discharge structure. Side walls 3 are jointly arranged on the sides of the bottom plate 1 of the energy dissipation pool and the bottom plate 2 of the water discharge structure. A rotating device 6 and a guide sill 7 are arranged on the bottom plate 1 of the energy dissipation pool.

[0033] Embodiment 2

[0034] The present embodiment provides an enhanced energy dissipation pool aeration device. As Figures 1-4 shown, it includes the bottom plate 1 of the energy dissipation pool. One side of the bottom plate 1 of the energy dissipation pool is connected to the bottom plate 2 of the water discharge structure. Side walls 3 are jointly arranged on the sides of the bottom plate 1 of the energy dissipation pool and the bottom plate 2 of the water discharge structure. A rotating device 6 and a guide sill 7 are arranged on the bottom plate 1 of the energy dissipation pool. A tail sill 4 and energy dissipation piers 5 are arranged on the bottom plate 1 of the energy dissipation pool. The tail sill 4 is arranged at the end of the bottom plate 1 of the energy dissipation pool. The energy dissipation piers 5 are arranged between the rotating device 6 and the tail sill 4. The rotating device 6 is arranged near the bottom plate 2 of the water discharge structure. The guide sill 7 is arranged on the side of the rotating device 6 close to the bottom plate 2 of the water discharge structure. The guide sill 7 has a slope. The rotating device 6 includes a shaft body 61, blades 62 and a driving shaft 63. The blades 62 surround the outside of the shaft body 61. The driving shaft 63 is arranged at both ends of the shaft body 61.

[0035] Embodiment 3

[0036] The present embodiment provides an enhanced energy dissipation pool aeration device. As Figures 1-4As shown in the figure, it includes the stilling basin floor slab 1. One side of the stilling basin floor slab 1 is connected to the discharge structure floor slab 2. Side walls 3 are jointly arranged on the sides of the stilling basin floor slab 1 and the discharge structure floor slab 2. A rotating device 6 and a guide sill 7 are provided on the stilling basin floor slab 1. A tail sill 4 and stilling blocks 5 are arranged on the stilling basin floor slab 1. The tail sill 4 is arranged at the end of the stilling basin floor slab 1. The stilling blocks 5 are arranged between the rotating device 6 and the tail sill 4. The rotating device 6 is arranged near the discharge structure floor slab 2. The guide sill 7 is arranged on the side of the rotating device 6 close to the discharge structure floor slab 2. The guide sill 7 has a slope. The rotating device 6 includes a shaft body 61, blades 62 and a driving shaft 63. The blades 62 surround the outside of the shaft body 61. The driving shaft 63 is arranged at both ends of the shaft body 61. Air intake holes 8 are vertically opened on the side walls 3. The air intake holes 8 are opened near the driving shaft 63. An air suction fan 9 is arranged in the air intake holes 8. Exhaust holes 10 are opened on the side walls of the tail sill 4, the stilling blocks 5 and the side walls 3. The exhaust holes 10 are communicated with the air intake holes 8 through air pipes 11.

[0037] Embodiment 4

[0038] The present embodiment provides an enhanced aeration device for the stilling basin, as Figures 1-4 shown in the figure, it includes the stilling basin floor slab 1. One side of the stilling basin floor slab 1 is connected to the discharge structure floor slab 2. Side walls 3 are jointly arranged on the sides of the stilling basin floor slab 1 and the discharge structure floor slab 2. A rotating device 6 and a guide sill 7 are provided on the stilling basin floor slab 1. A tail sill 4 and stilling blocks 5 are arranged on the stilling basin floor slab 1. The tail sill 4 is arranged at the end of the stilling basin floor slab 1. The stilling blocks 5 are arranged between the rotating device 6 and the tail sill 4. The rotating device 6 is arranged near the discharge structure floor slab 2. The guide sill 7 is arranged on the side of the rotating device 6 close to the discharge structure floor slab 2. The guide sill 7 has a slope. The rotating device 6 includes a shaft body 61, blades 62 and a driving shaft 63. The blades 62 surround the outside of the shaft body 61. The driving shaft 63 is arranged at both ends of the shaft body 61. Air intake holes 8 are vertically opened on the side walls 3. The air intake holes 8 are opened near the driving shaft 63. An air suction fan 9 is arranged in the air intake holes 8. Exhaust holes 10 are opened on the side walls of the tail sill 4, the stilling blocks 5 and the side walls 3. The exhaust holes 10 are communicated with the air intake holes 8 through air pipes 11. A driven shaft 91 is arranged at the center of the air suction fan 9. The driven shaft 91 is connected with a speed change gear 12. The speed change gear 12 includes a driving bevel gear 121 and a driven bevel gear 122. The driving bevel gear 121 is fixed on the driving shaft 63. The driven bevel gear 122 is fixed on the driven shaft 91.

[0039] The enhanced aeration device for the stilling basin provided by the present utility model utilizes the principle of converting the kinetic energy of water flow into mechanical energy to drive the air suction fan 9 to rotate, so that air is sucked into the air intake holes 8 and is transported to the parts of the stilling basin that need to be aerated through the air pipes 11, achieving the purpose of enhancing the aeration of the stilling basin.

Claims

1. Energy dissipation pool aeration device for enhancement, characterized in that It includes a stilling basin bottom slab (1), one side of the stilling basin bottom slab (1) is connected to a water discharge structure bottom slab (2), side walls (3) are jointly arranged on the sides of the stilling basin bottom slab (1) and the water discharge structure bottom slab (2), a rotating device (6) and a guide sill (7) are arranged on the stilling basin bottom slab (1); a tail sill (4) and stilling basin piers (5) are arranged on the stilling basin bottom slab (1), the tail sill (4) is arranged at the end of the stilling basin bottom slab (1), and the stilling basin piers (5) are arranged between the rotating device (6) and the tail sill (4); the rotating device (6) is arranged near the water discharge structure bottom slab (2), the guide sill (7) is arranged on the side of the rotating device (6) close to the water discharge structure bottom slab (2), and the guide sill (7) has a slope; the rotating device (6) includes a shaft body (61), blades (62) and a driving shaft (63), the blades (62) surround the outside of the shaft body (61), and the driving shaft (63) is arranged at both ends of the shaft body (61); air inlet holes (8) are vertically opened in the side walls (3), the air inlet holes (8) are opened near the driving shaft (63), and an air suction fan (9) is arranged in the air inlet holes (8); exhaust holes (10) are opened on the side walls of the tail sill (4), the stilling basin piers (5) and the side walls (3), and the exhaust holes (10) are communicated with the air inlet holes (8) through air pipes (11).

2. The aeration device for enhancing the energy dissipation pool according to claim 1, wherein A driven shaft (91) is arranged at the center of the air suction fan (9), and a speed change gear (12) is connected to the driven shaft (91).

3. The aeration device for enhancing the energy dissipation pool according to claim 2, characterized in that, The speed change gear (12) includes a driving bevel gear (121) and a driven bevel gear (122), the driving bevel gear (121) is fixed on the driving shaft (63), and the driven bevel gear (122) is fixed on the driven shaft (91).

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