Energy dissipation structure of water conservancy project

Abstract

The energy dissipation structure comprises an energy dissipation pool, an energy dissipation pool tail ridge is arranged at the tail of the energy dissipation pool, a buffer groove is formed in the bottom of the energy dissipation pool in a downwards-sunken mode, a flat plate is installed at an opening of the buffer groove, a water inlet entering the buffer groove is formed in the head of the flat plate, and a water outlet discharging the buffer groove is formed in the tail of the flat plate. The first energy dissipation piece is arranged in the buffer groove, the first energy dissipation piece and the second energy dissipation piece are both used for conducting multiple times of energy dissipation on flowing water in the energy dissipation pool, the energy dissipation structure can conduct flow division and multiple times of energy dissipation on water flow, kinetic energy in the water flow is greatly reduced, and then impact of the water flow on the stilling pool is reduced; and the stilling pool is better protected, and the service life of the stilling pool is prolonged.

Description

Technical Field

[0001] This utility model relates to an energy dissipation structure for water conservancy projects. Background Technology

[0002] Hydraulic engineering is a general term for all engineering construction projects undertaken to control, utilize, and protect surface and underground water resources and the environment. During the construction of hydraulic engineering projects, energy dissipation structures can eliminate excess kinetic energy from the rapid flow discharged by spillway structures or drop structures, preventing or mitigating the scouring and damage to hydraulic structures and downstream canals. Energy dissipation structures include stilling basins, which are energy dissipation facilities that induce a bottom-flow hydraulic jump downstream of the spillway structure. Stilling basins can quickly transform a rapid flow into a slow flow, generally eliminating 40%-70% of the kinetic energy of the discharged water flow, and can shorten the length of the apron. They are an effective and economical energy dissipation facility, and stilling basins commonly come in three forms: descending type, stilling sill type, and combined type.

[0003] In dam design, flood discharge and energy dissipation are the two major tasks undertaken by spillway structures. That is, to safely discharge excess floodwater while strictly controlling the scouring of the downstream water flow on the dam body and downstream foundation pit, so as to prevent dam damage and dam foundation instability.

[0004] For example, patent application number 201810485885.7, entitled "An Energy Dissipation Structure and Adjustment Method for Adjustable Height of Stilling Pool Tail Sill," describes a device comprising a stepped overflow dam, a WES (Wave-Earth) counter-arc section, and a stilling pool, all connected in sequence. A tail sill is located at the tail end of the stilling pool, and a hydraulic lifting device is installed at the bottom of the tail sill. The height of the tail sill can be adjusted using this device. The device improves the energy dissipation rate under different water flow conditions. However, the energy reduction effect is still not ideal during use, and the effect is not significant under large water flow rates, with the outflowing water still possessing considerable kinetic energy. Although the device can increase the height of the tail sill, the force of the water flow still causes significant damage to the tail sill and the inner wall of the stilling pool it contacts, reducing the service life of the stilling pool. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an energy dissipation structure for water conservancy projects. This energy dissipation structure can divert water flow and dissipate energy multiple times, greatly reducing the kinetic energy in the water flow, thereby reducing the impact of the water flow on the stilling basin, better protecting the stilling basin and extending its service life.

[0006] To achieve the above objectives, this utility model provides an energy dissipation structure for a water conservancy project, including an energy dissipation pool, an energy dissipation pool tail sill, a buffer groove recessed at the bottom of the energy dissipation pool, a flat plate installed at the opening of the buffer groove, an inlet for entering the buffer groove at the head of the flat plate, and an outlet for exiting the buffer groove at the tail. A first energy dissipation component is provided on the flat plate, and a second energy dissipation component is provided inside the buffer groove. Both the first and second energy dissipation components are used to dissipate energy multiple times for the flowing water in the energy dissipation pool.

[0007] Furthermore, the first energy dissipation component includes a concave-convex buffer plate mounted on a flat plate and multiple sets of rotating energy dissipation parts. Each set of rotating energy dissipation parts includes a rotating plate. The rotating plate tilts under the impact of the water flow, causing the tilted rotating plate to dissipate the kinetic energy of the water flow.

[0008] Furthermore, each of the multiple sets of rotating energy-consuming parts also includes multiple sets of inclined support seats. The inclined support seats are fixedly installed on the plate. The plate has an arc-shaped groove at the front end of the inclined support seat. The end of the inclined support seat has a hinge end that is hinged to the rotating plate. The lower end of the rotating plate is vertically arranged in the arc-shaped groove and fits against the vertical end face of the arc-shaped groove. An elastic telescopic part is provided between the lower end of the rotating plate and the arc-shaped end face of the arc-shaped groove. The elastic telescopic part is used to further restrict the rotation of the rotating plate.

[0009] Furthermore, the elastic telescopic part includes a limiting block protruding from the lower end of the rotating plate. The limiting block is convex. The arc-shaped groove has an arc-shaped sliding groove corresponding to the limiting block. The arc-shaped sliding groove is convex and has a spring inside. One end of the spring is fixed to the limiting block, and the other end is fixed to the end of the arc-shaped sliding groove away from the vertical end face.

[0010] Furthermore, the second energy dissipation component includes a first rotating energy dissipation part at the outlet of the buffer tank and an energy dissipation step at the bottom of the buffer tank. The first rotating energy dissipation part includes a support frame, the upper end of which is fixedly connected to the lower end face of the plate. The support frame is provided with multiple sets of rotating rollers, and the rotating rollers are provided with multiple rotating blades. Fixed energy dissipation blocks are distributed at intervals on each step surface of the energy dissipation step.

[0011] Furthermore, the second energy dissipation component includes a buffer tank with a first rotating energy dissipation part at the inlet and outlet, and a second rotating energy dissipation part disposed between the first rotating energy dissipation parts. Each of the first rotating energy dissipation parts includes a support frame, the upper end of which is fixedly connected to the lower end face of the plate. The support frame is provided with multiple sets of rotating rollers, and the rotating rollers are provided with multiple rotating blades.

[0012] Furthermore, the second rotating energy dissipation part includes a first support base in the shape of an isosceles trapezoid, and multiple sets of rotating rollers are longitudinally connected to the inclined end faces on both sides of the first support base, and each rotating roller is provided with multiple rotating blades.

[0013] Beneficial effects: This utility model provides a flat plate and a buffer tank for the energy dissipation pool. The flat plate is equipped with a water inlet to realize the diversion of water. The diverted water is buffered and dissipated by the first energy dissipation component on the flat plate and the second energy dissipation component in the energy dissipation pool, thereby reducing the impact of water flow on the energy dissipation pool, the energy dissipation tail sill and the downstream riverbed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of Example 1;

[0015] Figure 2 This is a schematic diagram of Example 2;

[0016] Figure 3 This is a schematic diagram of the second rotating energy dissipation section;

[0017] Figure 4 This is a schematic diagram of the rotating energy-consuming part;

[0018] Figure 5 This is a schematic diagram of the first type of inclined support.

[0019] Figure 6 This is a schematic diagram of the rotating plate.

[0020] Reference numerals in the attached drawings: 1. Energy dissipation pool; 2. Tail sill of energy dissipation pool; 3. Buffer trough; 4. Flat plate; 5. Inlet; 6. Outlet; 7. First energy dissipation component; 71. Concave-convex buffer plate; 72. Rotating energy dissipation part; 721. Inclined support seat; 722. Rotating plate; 723. Elastic telescopic part; 724. Arc-shaped groove; 725. Spring; 726. Limiting block; 727. Arc-shaped slide; 9. First rotating energy dissipation part; 91. Support frame; 10. Energy dissipation step; 101. Energy dissipation fixing block; 11. Second rotating energy dissipation part; 111. First support seat; 12. Rotating roller; 13. Rotating blade. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] For reference Figures 1-6As shown, Embodiment 1 of this utility model provides an energy dissipation structure for a water conservancy project, including an energy dissipation pool 1, a tail sill of the energy dissipation pool 1, a buffer groove 3 recessed at the bottom of the energy dissipation pool 1, a flat plate 4 installed at the opening of the buffer groove 3, an inlet 5 for water to enter the energy dissipation pool 1 on the flat plate 4, and an outlet 6 for water to exit the energy dissipation pool 1 at the tail end. A first energy dissipation component 7 is provided on the flat plate 4, and a second energy dissipation component is provided inside the energy dissipation pool 1. The water is diverted through the inlet 5, with one part of the water being dissipated by the first energy dissipation component 7, and the other part of the water entering the energy dissipation pool 1 through the inlet 5, being dissipated by the second energy dissipation component, and then being dissipated again by the water flow on the flat plate 4 through the outlet 6, thereby consuming the kinetic energy of the impact force of the water flow and reducing the impact on the tail sill of the energy dissipation pool 1 and the subsequent downstream river.

[0023] Specifically, the first energy dissipation component 7 includes a concave-convex buffer plate 71 mounted on the flat plate 4 and multiple sets of rotating energy dissipation parts 72. Each set of rotating energy dissipation parts 72 includes multiple sets of inclined support seats 721. The multiple sets of inclined support seats 721 are connected to a common rotating plate 722. The rotating plate 722 has a groove on its end face facing the inclined support seat 721 and a connecting end corresponding to the inclined support seat 721. The inclined support seat 721 has a hinge end corresponding to the connecting end. Figure 5 As shown, a vertical limiting post is provided on the inclined support base 721, and the vertical limiting post is integrally formed with the inclined support base 721. Or as... Figure 6 As shown, a vertical limiting post is provided on the plate 4. The vertical limiting post is located behind the inclined support 721 and is spaced at a certain distance. The upper end of the vertical limiting post is inclined and is used to limit the rotation angle of the rotating plate 722. The plate 4 has an arc-shaped groove 724 at the front end of the inclined support 721. When the rotating plate 722 is not rotating, it is in contact with the vertical end face of the arc-shaped groove 724. The lower end of the rotating plate 722 is inclined and has an elastic telescopic part 723 between it and the arc-shaped end face of the arc-shaped groove 724. The elastic telescopic part 723 is used to further limit the excessive rotation of the rotating plate 722. The elastic telescopic part 723 includes a limiting block 726 protruding from the lower end of the rotating plate 722. The limiting block 726 is convex. The arc-shaped end face of the arc-shaped groove 724 is provided with an arc-shaped sliding groove 727 corresponding to the limiting block 726. The arc-shaped sliding groove 727 is convex and has a spring 725 inside. One end of the spring 725 is fixed to the limiting block 726, and the other end is fixed to the end of the arc-shaped sliding groove 727 away from the vertical end face. The spring 725 is restricted by the convex shape and will not fall out of the arc-shaped sliding groove 727. Since the sliding groove is arc-shaped, the spring 725 is compressed or expanded in an arc shape when the limiting block 726 moves.

[0024] During operation, the water flows through the concave-convex buffer plate 71, which has a wave-like concave-convex shape. During the flow, the crests of the concave-convex buffer plate 71 consume a certain amount of kinetic energy, and the smooth water flow does not cause impact on the stilling pool. The water flows through the concave-convex buffer plate 71 and comes into contact with the rotating plate 722. The rotating plate 722 is subjected to force and tilts towards the stilling tail end. The rotating plate 722 will rotate along the hinge end. The limiting block 726 at the lower end of the rotating plate 722 will slide along the arc-shaped slide groove 727 and push the spring 725 to a certain compressed state. The degree of tilt is limited by the elastic telescopic part 723 and the vertical limiting post to prevent the rotating plate 722 from tilting excessively. At this time, the tilted rotating plate 722 will consume the kinetic energy of the water flow again, thereby further reducing the impact of the water flow on the stilling pool and providing better protection.

[0025] To further enhance energy dissipation of the water flow, a portion of the water entering the energy dissipation tank 1 is diverted into the buffer tank 3 through the inlet 5. The water then passes through a second energy dissipation component within the buffer tank 3. This second component includes a first rotating energy dissipation section 9 located at the outlet 6 of the buffer tank 3 and an energy dissipation step 10 at the bottom of the buffer tank 3. The first rotating energy dissipation section 9 includes a support frame 91, the upper end of which is fixedly connected to the lower end face of the plate 4. Multiple sets of rotating rollers 12 are mounted on the support frame 91, and each roller 12 has multiple rotating blades 13. Fixed energy dissipation blocks are spaced apart on each step of the energy dissipation step 10. Water entering the buffer tank 3 first passes through the energy dissipation step 10 and the fixed energy dissipation blocks for energy dissipation, and then passes through the first rotating energy dissipation section 9 for further energy dissipation before flowing out from the outlet 6 and meeting the water flowing on the plate 4. This further cancels out the kinetic energy, reducing the impact force of the water flow.

[0026] See example 2. Figure 3 As shown, this utility model also provides a second embodiment, which is basically the same as the first embodiment, except that: the second energy dissipation component includes a buffer tank 3 with a first rotating energy dissipation part 9 corresponding to the water inlet 5 and the water outlet 6, and a second rotating energy dissipation part 11 disposed between the first rotating energy dissipation parts 9. The first rotating energy dissipation part 9 includes a support frame 91, the upper end of which is fixedly connected to the lower end face of the plate 4. The support frame 91 is provided with multiple sets of rotating rollers 12, and the rotating rollers 12 are provided with multiple rotating blades 13. The second rotating energy dissipation part 11 includes a first support seat 111 in the shape of an isosceles trapezoid. The first support seat 111 is used to support the middle part of the plate 4. Multiple sets of rotating rollers 12 are longitudinally connected to the inclined end faces on both sides of the first support seat 111. The rotating rollers 12 are provided with multiple rotating blades 13. The ability of the rotating blades 13 to consume the flowing water reduces the impact force of the water flow.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hydraulic energy dissipation structure comprising a dissipation basin (1) provided with a tail sill at the tail of the dissipation basin (1), characterized in that: It also includes a plate (4), the bottom of the energy dissipation pool (1) is recessed and a buffer groove (3) is provided, the plate (4) is installed at the opening of the buffer groove (3), the head of the plate (4) is provided with an inlet (5) for entering the buffer groove (3), and the tail is provided with an outlet (6) for discharging from the buffer groove (3). The plate (4) is provided with a first energy dissipation component (7), and the buffer groove (3) is provided with a second energy dissipation component (8). The first energy dissipation component (7) and the second energy dissipation component are both used to dissipate the energy of the flowing water in the energy dissipation pool (1) multiple times.

2. A hydraulic energy dissipating structure according to claim 1, characterised in that: The first energy dissipation component (7) includes a concave-convex buffer plate (71) mounted on a flat plate (4) and multiple sets of rotating energy dissipation parts (72). Each set of rotating energy dissipation parts (72) includes a rotating plate (722). The rotating plate (722) tilts under the impact of the water flow, so that the tilted rotating plate (722) dissipates the kinetic energy of the water flow.

3. A hydraulic energy dissipating structure according to claim 2, characterised in that: Each of the multiple sets of rotating energy-consuming parts (72) also includes multiple sets of inclined support seats (721). The inclined support seats (721) are fixedly installed on the plate (4). The plate (4) is provided with an arc-shaped groove (724) at the front end of the inclined support seats (721). The end of the inclined support seats (721) is provided with a hinge end that is hinged to the rotating plate (722). The lower end of the rotating plate (722) is vertically arranged in the arc-shaped groove (724) and fits against the vertical end face of the arc-shaped groove (724). An elastic telescopic part (723) is provided between the lower end of the rotating plate (722) and the arc-shaped end face of the arc-shaped groove (724). The elastic telescopic part (723) is used to further restrict the rotation of the rotating plate (722).

4. A hydraulic energy dissipating structure according to claim 3, characterised in that: The elastic telescopic part (723) includes a limiting block (726) protruding from the lower end of the rotating plate (722). The limiting block (726) is convex. The arc-shaped groove (724) has an arc-shaped sliding groove (727) corresponding to the limiting block (726). The arc-shaped sliding groove (727) is convex and has a spring (725) inside. One end of the spring (725) is fixed to the limiting block (726), and the other end is fixed to the end of the arc-shaped sliding groove (727) away from the vertical end face.

5. A hydraulic energy dissipating structure according to claim 4, characterised in that: The second energy dissipation component includes a first rotating energy dissipation part (9) provided at the outlet (6) of the buffer tank (3) and an energy dissipation step (10) provided at the bottom of the buffer tank (3). The first rotating energy dissipation part (9) includes a support frame (91). The upper end of the support frame (91) is fixedly connected to the lower end face of the plate (4). The support frame (91) is provided with multiple sets of rotating rollers (12). The rotating rollers (12) are provided with multiple rotating blades (13). Fixed energy dissipation blocks are distributed at intervals on each step surface of the energy dissipation step (10).

6. A hydraulic energy dissipating structure according to claim 4, characterised in that: The second energy dissipation component includes a buffer tank (3) with a first rotating energy dissipation part (9) and a second rotating energy dissipation part (11) disposed between the first rotating energy dissipation parts (9). The first rotating energy dissipation part (9) includes a support frame (91). The upper end of the support frame (91) is fixedly connected to the lower end face of the plate (4). The support frame (91) is provided with multiple sets of rotating rollers (12). The rotating rollers (12) are provided with multiple rotating blades (13).

7. A hydraulic energy dissipating structure according to claim 6, characterised in that: The second rotating energy dissipation part (11) includes a first support base (111) in the shape of an isosceles trapezoid. Multiple sets of rotating rollers (12) are longitudinally connected to the inclined end faces on both sides of the first support base (111). Each rotating roller (12) is provided with multiple rotating blades (13).

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