Energy dissipation and scour prevention structure of flood discharge gate

Abstract

The utility model discloses a sluice energy dissipation and scour prevention structure, which belongs to the technical field of hydraulic engineering facilities, and comprises a sluice dam foundation and a concrete sluice dam built on the sluice dam foundation, a concrete apron is poured on the downstream side of the concrete sluice dam, an energy dissipation device is arranged above the concrete apron, and a plurality of groups of buffer waterwheels are arranged on the downstream side of the energy dissipation device. The buffer waterwheel comprises a rotating shaft rotationally arranged on the concrete apron and a plurality of rotating fan blades fixedly connected to the rotating shaft, the rotating fan blades are evenly arranged in the circumferential direction of the rotating shaft, two anti-scour walls are poured below the tail end, in the water flow direction, of the concrete apron, and the lower ends of the anti-scour walls are located in the gate dam foundation. A concrete apron is poured on the downstream side of the concrete apron, the concrete apron is composed of a plurality of rectangular frame bodies, and the rectangular frame bodies are filled with concrete tetrahedrons. The flood discharge gate has the effects of improving the structural strength of the flood discharge gate, improving the construction rapidness and improving the efficiency of the flood discharge gate.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering facilities, and particularly to an energy dissipation and erosion prevention structure for a flood discharge sluice. Background Art

[0002] In water conservancy and hydropower projects, water discharge structures (such as flood discharge sluices) are crucial for ensuring the safety of reservoirs and giving full play to the engineering benefits. The water flow pattern of water discharge structures directly affects their operational reliability. Under high-speed water flow, it often causes vibrations, cavitations, scouring, or exacerbates sediment abrasion and other adverse consequences to the gates and the buildings where they are located. The energy dissipation structure is an important part of the water discharge structure, responsible for dissipating part or most of the kinetic energy of the water flow, and enabling the water flow discharged by the energy dissipation structure to be properly connected with the original water flow in the downstream river channel. Hydraulic jump energy dissipation can be applied to various water discharge structures with high, medium, and low water heads, large, medium, and small flow rates. This energy dissipation method has low requirements for geological conditions and good adaptability to the variation range of tail water, so it has been widely used.

[0003] In water conservancy projects, flood discharge sluices are one of the key facilities for discharging the excess water volume during flood periods. However, when the flood discharge sluice discharges the excess water volume during flood periods, the high-speed water flow passing through the flood discharge sluice will generate a strong scouring force, causing serious damage to the sluice body and the downstream riverbed.

[0004] Currently, although there are already some energy dissipation and erosion prevention structures applied to flood discharge sluices, there are still many deficiencies, such as low structural strength, slow construction speed, poor energy dissipation effect, etc. Therefore, there is an urgent need for a new type of energy dissipation and erosion prevention structure for flood discharge sluices to solve the above problems. Utility Model Content

[0005] In order to improve the structural strength, construction speed, and energy dissipation effect of the flood discharge sluice, this application provides an energy dissipation and erosion prevention structure for a flood discharge sluice.

[0006] The energy dissipation and erosion prevention structure for a flood discharge sluice provided by this application adopts the following technical solutions:

[0007] An energy dissipation and erosion prevention structure for a flood discharge sluice includes a sluice dam foundation, a concrete sluice dam built on the sluice dam foundation. An energy dissipation device is arranged above the concrete apron. A plurality of buffer water wheels are arranged on the downstream side of the energy dissipation device. The buffer water wheels include a rotating shaft rotatably arranged on the concrete apron, and a plurality of rotating blades fixedly connected to the rotating shaft. The rotating blades are evenly arranged in the circumferential direction around the rotating shaft. An erosion prevention wall with its lower end located in the sluice dam foundation is poured below the end of the concrete apron along the water flow direction. There are two erosion prevention walls. A concrete apron is poured on the downstream side of the concrete apron. The concrete apron is composed of a plurality of rectangular frames, and the inside of the rectangular frames is filled with concrete tetrahedrons.

[0008] By adopting the above technical solutions, when water flows out through the flood discharge opening, it first passes through the energy dissipation device on the concrete apron to perform the first energy dissipation on the water flow and reduce the scouring force on the downstream. The water flow after the first energy dissipation scours the buffer waterwheel on the downstream side of the energy dissipation device, and the buffer waterwheel rotates under the action of the water flow, thereby performing secondary energy dissipation on the water flow. The anti-scouring wall is made of concrete, which can prevent the water seeping through the transverse joints of the concrete apron from seeping into the dam foundation. While the concrete apron plays a good role in energy dissipation, the internal frame of the rectangular frame has a better matching degree with the concrete tetrahedron, preventing the concrete tetrahedron from being easily washed away by the water flow and increasing the stability of the apron; the concrete tetrahedron can well solve the problem of limited large stone resources in nature, and the concrete tetrahedron can be prefabricated in the factory with molds.

[0009] Preferably, the energy dissipation device includes a plurality of energy dissipation plates arranged above the concrete apron, and the energy dissipation plates are arranged at uniform intervals and staggered to form an energy dissipation channel.

[0010] By adopting the above technical solutions, a plurality of energy dissipation plates are arranged at uniform intervals to form an energy dissipation channel, which can perform multiple energy consumptions on the water flow, thereby greatly consuming the energy of the water flow and reducing the scouring force of the water flow.

[0011] Preferably, the outer surface of the energy dissipation plate is provided with a concave-convex structure.

[0012] By adopting the above technical solutions, the design of the concave-convex structure on the energy dissipation plate helps to increase the contact area between the water flow and the energy dissipation plate, significantly improves the energy dissipation efficiency of the water flow, and further dissipates the energy of the water flow.

[0013] Preferably, the energy dissipation plate is made of a high-strength composite material.

[0014] By adopting the above technical solutions, since the energy dissipation plate is directly in contact with the water flow and bears the scouring of the water flow, selecting a wear-resistant material can significantly improve the strength and corrosion resistance of the energy dissipation plate structure, reduce the frequency of maintenance and replacement, and lower the maintenance cost.

[0015] Preferably, the outer surface of the energy dissipation plate is coated with a polymer wear-resistant material.

[0016] By adopting the above technical solutions, the polymer wear-resistant material can significantly enhance the wear resistance of the energy dissipation plate, further extend its service life, and reduce the maintenance cost.

[0017] Preferably, the rotating fan blades are made of an elastic material.

[0018] By adopting the above technical solutions, the elastic material has good buffering and energy absorption performance, can better absorb the impact force of the water flow, and further protect the downstream riverbed from damage. At the same time, the elastic material also has a certain deformation recovery ability, and even after being scoured by the water flow for a long time, the rotating fan blades can still maintain a good working state.

[0019] Preferably, a loose body is filled below the dam foundation, and the lower end of the erosion control wall penetrates through the loose body.

[0020] By adopting the above technical solutions, the lower end of the erosion control wall penetrates through the loose body, so that the erosion control wall can better prevent water from seeping into the dam foundation, and avoid the safety hazard caused by the long-term scouring of the loose body filled below the dam foundation. The effect of the erosion control wall in blocking seepage is better.

[0021] Preferably, a number of groups of fixing rods are arranged below the concrete apron, the fixing rods are fixedly connected with the rectangular frame body, and one end of the fixing rod far away from the rectangular frame body is connected with the bottom of the dam foundation.

[0022] By adopting the above technical solutions, the arrangement of the fixing rods can improve the tensile resistance of the concrete apron, thereby improving the stability of the entire flood discharge sluice.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When the water flow flows out through the flood discharge opening, it first passes through the energy dissipation device on the concrete apron to perform the first energy dissipation on the water flow, reducing its scouring force on the downstream. The water flow after the first energy dissipation scours the buffer waterwheel on the downstream side of the energy dissipation device, and the buffer waterwheel rotates under the action of the water flow, thereby performing secondary energy dissipation on the water flow. The erosion control wall is made of concrete, which can prevent the water seeping through the transverse joints of the concrete apron from seeping into the dam foundation. While the concrete apron plays a good role in energy dissipation, the internal frame of the rectangular frame body has a better matching degree with the concrete tetrahedron, preventing the concrete tetrahedron from being easily washed away by the water flow and increasing the stability of the apron; the concrete tetrahedron can well solve the problem of limited large block stone resources in nature, and the concrete tetrahedron can be prefabricated in the factory with a mold;

[0025] 2. Since the energy dissipation plate is directly in contact with the water flow and bears the scouring of the water flow, selecting wear-resistant materials can significantly improve the strength and corrosion resistance of the energy dissipation plate structure, reduce the frequency of maintenance and replacement, and reduce the maintenance cost;

[0026] 3. The elastic material has good buffering and energy absorption performance, can better absorb the impact force of the water flow, and further protect the downstream riverbed from damage. At the same time, the elastic material also has a certain deformation recovery ability, and even after being scoured by the water flow for a long time, the rotating fan blades can still maintain a good working state. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of an energy dissipation and scour prevention structure of a flood discharge sluice according to an embodiment of the present application.

[0028] Figure 2 is Figure 1 an enlarged schematic diagram at position A in

[0029] Figure 3 It is a schematic internal structure diagram of an energy dissipation and scour prevention structure of a flood discharge sluice according to an embodiment of the present application.

[0030] Reference Signs:

[0031] 1. Sluice dam foundation; 2. Concrete sluice dam; 3. Concrete apron; 31. Scour prevention wall; 4. Energy dissipation device; 41. Energy dissipation plate; 42. Concave-convex structure; 5. Buffer water truck; 51. Rotating shaft; 52. Rotating fan blade; 6. Concrete sea mattress; 61. Rectangular frame; 62. Concrete tetrahedron; 7. Fixed rod. Detailed Description of the Embodiment

[0032] The following further elaborates on the present application in conjunction with the attached Figures 1-3 drawings.

[0033] An embodiment of the present application discloses an energy dissipation and scour prevention structure of a flood discharge sluice. Referring to Figure 1 , an energy dissipation and scour prevention structure of a flood discharge sluice includes a sluice dam foundation 1, a concrete sluice dam 2 is built on the sluice dam foundation 1, a concrete apron 3 is poured on the downstream side of the concrete sluice dam 2, and an energy dissipation device 4 is arranged above the concrete apron 3. The energy dissipation device 4 includes an energy dissipation plate 41 arranged above the concrete apron 3. The energy dissipation plate 41 is horizontally arranged. There are several groups of energy dissipation plates 41. The energy dissipation plates 41 are fixedly connected above the concrete apron 3 and are evenly spaced to form an energy dissipation channel. The arrangement of the energy dissipation device 4 can perform primary energy dissipation on the water flow, reduce its scouring force on the downstream, and improve the safety and stability of the flood discharge sluice.

[0034] Referring to Figure 1 , Figure 2, a buffer waterwheel 5 is arranged on the downstream side of the energy dissipation device 4. The buffer waterwheel 5 includes a rotating shaft 51 and rotating blades 52. The rotating shaft 51 is circular and cylindrical, the rotating shaft 51 is arranged vertically, and multiple groups of rotating shafts 51 are provided. The rotating shaft 51 is rotatably arranged above the concrete apron 3. The rotating blade 52 is in the shape of a rectangular plate, the rotating blade 52 is arranged vertically, and multiple groups of rotating blades 52 are provided. The rotating blades 52 are evenly arranged around the circumference of the rotating shaft 51. The buffer waterwheel 5 can dissipate the energy of the water flow after the first energy dissipation again. The elastic rotating blades 52 have good buffering and energy absorption performance, and can better absorb the impact force of the water flow to achieve the effect of dissipating the energy of the water flow. The outer surface of the energy dissipation plate 41 is provided with a concave-convex structure 42, and the concave-convex structure 42 on the outer surface of the energy dissipation plate 41 further increases the contact area between the water flow and the energy dissipation plate 41, thereby increasing the energy dissipation efficiency of the energy dissipation plate 41 for the water flow.

[0035] Refer to Figure 3 , a scour prevention wall 31 is cast below the end of the concrete apron 3 along the water flow direction. The scour prevention wall 31 is in the shape of a rectangular plate, the scour prevention wall 31 is arranged vertically, two scour prevention walls 31 are provided, and the lower end of the scour prevention wall 31 is arranged in the dam foundation 1. The arrangement of the scour prevention wall 31 can prevent water from seeping into the dam foundation 1 through the transverse joints of the concrete apron 3, and avoid potential safety hazards caused by the long-term scouring of the loose body buried below the dam foundation 1.

[0036] Refer to Figure 1 , Figure 3 , a concrete apron 6 is cast on the downstream side of the concrete apron 3. The concrete apron 6 includes a rectangular frame body 61 and concrete tetrahedrons 62. The rectangular frame body 61 is arranged horizontally and is cast on the downstream side of the concrete apron 3. The concrete tetrahedrons 62 are filled inside the rectangular frame body 61. A fixing rod 7 is arranged below the rectangular frame body 61. The fixing rod 7 is in the shape of a rectangular rod, the fixing rod 7 is arranged vertically, multiple groups of fixing rods 7 are provided, and the fixing rod 7 is fixedly connected to the rectangular frame body 61. The concrete apron 6 can dissipate the energy of the water flow well. The internal frame of the rectangular frame body 61 has a better matching degree with the concrete tetrahedrons 62, preventing the concrete tetrahedrons 62 from being easily washed away by the water flow and increasing the overall stability of the concrete apron 6. The arrangement of the fixing rod 7 can also improve the tensile resistance of the concrete apron 6 well, thereby improving the overall stability of the flood discharge sluice.

[0037] The implementation principle of an energy dissipation and scour prevention structure for a flood discharge sluice in an embodiment of the present application is as follows: Water flows out through the flood discharge opening and first undergoes primary energy dissipation through multiple energy dissipation plates 41 on the concrete apron. The concave-convex structure 42 on the energy dissipation plates 41 can further dissipate the energy of the water flow, reducing the scouring force on the downstream. The water flow after primary energy dissipation scours the buffer waterwheel 5. The buffer waterwheel 5 rotates under the action of the water flow and dissipates the energy of the water flow again. The rotating fan blades 52 made of elastic material can well absorb the impact force of the water flow, further protecting the downstream riverbed from damage. The scour prevention wall 31 cast below the end of the concrete apron 3 along the water flow direction can effectively prevent water from seeping into the dam foundation 1. While the concrete apron 6 plays a good role in energy dissipation, the internal frame of the rectangular frame 61 has a better matching degree with the concrete tetrahedron 62, preventing the concrete tetrahedron 62 from being easily washed away by the water flow, increasing the stability of the concrete apron 6, and thus enhancing the stability of the entire flood discharge sluice.

[0038] The above are all the preferred embodiments of the present application. Without restricting the protection scope of the present application based on this, therefore: All equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A energy dissipation and scour prevention structure for flood discharge sluice, comprising a sluice dam foundation (1) and a concrete sluice dam (2) built on the sluice dam foundation (1), characterized in that: A concrete apron (3) is cast on the downstream side of the concrete sluice dam (2). An energy dissipation device (4) is arranged above the concrete apron (3). A plurality of buffer waterwheels (5) are arranged on the downstream side of the energy dissipation device (4). The buffer waterwheel (5) includes a rotating shaft (51) rotatably arranged on the concrete apron (3) and a plurality of rotating blades (52) fixedly connected to the rotating shaft (51). The rotating blades (52) are uniformly arranged in the circumferential direction around the rotating shaft (51). An erosion control wall (31) with its lower end located in the dam foundation (1) is cast below the end of the concrete apron (3) along the water flow direction. There are two erosion control walls (31). A concrete filter (6) is cast on the downstream side of the concrete apron (3). The concrete filter (6) is composed of a plurality of rectangular frames (61), and the interior of the rectangular frame (61) is filled with concrete tetrahedrons (62).

2. The energy dissipation and scour prevention structure of a flood discharge sluice according to claim 1, characterized in that: The energy dissipation device (4) includes a plurality of energy dissipation plates (41) arranged above the concrete apron (3). The energy dissipation plates (41) are uniformly spaced and staggered to form an energy dissipation channel.

3. The energy dissipation and scour prevention structure of a flood discharge sluice according to claim 2, characterized in that: The outer surface of the energy dissipation plate (41) is provided with a concave-convex structure (42).

4. A flood discharge sluice energy dissipation and erosion prevention structure according to claim 2, characterized in that: The energy dissipation plate (41) is made of a high-strength composite material.

5. A flood discharge sluice energy dissipation and scour prevention structure according to claim 2, characterized in that: The outer surface of the energy dissipation plate (41) is coated with a polymer wear-resistant material.

6. A flood discharge sluice energy dissipation and erosion prevention structure according to claim 1, characterized in that: The rotating blade (52) is made of an elastic material.

7. A flood discharge sluice energy dissipation and scour prevention structure according to claim 1, characterized in that: A loose body is buried below the dam foundation (1), and the lower end of the erosion control wall (31) penetrates through the loose body.

8. A flood discharge sluice energy dissipation and scour prevention structure according to claim 1, characterized in that: A plurality of groups of fixing rods (7) are arranged below the concrete filter (6). The fixing rods (7) are fixedly connected to the rectangular frames (61), and the end of the fixing rod (7) away from the rectangular frame (61) is connected to the bottom of the dam foundation (1).

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