Flood discharge and sand discharge device for water conservancy project

Abstract

The flood discharge and sand discharge device comprises a flood discharge and sand discharge hole, the flood discharge and sand discharge hole is connected with an upstream water source, a discharge chute pool is arranged at the downstream end of the flood discharge and sand discharge hole, an energy dissipation pool is arranged at the downstream end of the discharge chute pool, and an apron pool is arranged at the downstream end of the energy dissipation pool. The pipe hole section steps, the energy dissipation device in the energy dissipation pool and the apron jointly form a triple energy dissipation mechanism for reducing water flow resistance, and the overall energy dissipation effect is greatly improved; meanwhile, under the condition that the site is limited, the size of the energy dissipation pool can be saved while the energy dissipation effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of water conservancy project flood discharge sand discharge devices, belong to the technical field of hydroelectric and water conservancy engineering. BACKGROUND

[0002] Reservoir is the most important facility in water conservancy and hydropower engineering, flood discharge sand discharge is almost the thorny problem faced by every reservoir, more than 80% of which is in flood season with the water flow into the reservoir, especially in northwest China.In existing water conservancy engineering, especially in hydropower station, flood discharge sand discharge hole is often used as water discharge energy dissipation building to avoid the scouring of discharged water flow to riverbed or bank slope, or the abrasion of large amount of sediment to unit equipment and water delivery pipeline.In addition to meeting sufficient flood discharge capacity, flood discharge energy dissipation structure also needs to have good energy dissipation performance.The flood discharge energy dissipation structure in prior art has not ideal energy dissipation effect, and occupies large area, and the structure is quickly worn and consumed, therefore, we propose a kind of water conservancy project flood discharge sand discharge device. SUMMARY

[0003] The utility model discloses a kind of water conservancy project flood discharge sand discharge devices, energy dissipation effect is good, and in the case where site is limited, can save land size under the condition of guaranteeing energy dissipation effect.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: a kind of water conservancy project flood discharge sand discharge device, including flood discharge sand discharge hole, the flood discharge sand discharge hole is connected upstream water source, the downstream end of the flood discharge sand discharge hole is equipped with discharge channel pool, the downstream end of the discharge channel pool is provided with energy dissipation pool, the downstream end of the energy dissipation pool is provided with sea apron pool, the connecting place between the energy dissipation pool and sea apron pool is provided with apron, flood discharge sand discharge hole, energy dissipation pool and apron jointly play the role of energy dissipation, improve energy dissipation effect.

[0005] The aforementioned water conservancy project flood discharge sand discharge device, the flood discharge sand discharge hole includes water inlet, pipe hole section and water outlet, the water inlet and water outlet are placed at the both ends of pipe hole section, the water inlet is connected upstream water source, and the water outlet is connected discharge channel pool.

[0006] The aforementioned water conservancy project flood discharge sand discharge device, the whole pipe hole section is multi-slope, and the slope of the upstream side of pipe hole section is greater than the slope of the downstream side, so as to reduce the water flow impact force in pipe hole section and improve energy dissipation effect.

[0007] The aforementioned water conservancy project flood discharge sand discharge device, the hole shape of pipe hole section is circular and / or gate shape.

[0008] The aforementioned water conservancy project flood discharge sand discharge device, the hole bottom of pipe hole section is provided with step, so as to buffer water flow and improve energy dissipation effect.

[0009] The energy dissipation device in the energy dissipation pool of the water conservancy project flood discharge and sediment discharge device is arranged in the form of a plurality of rows, each row of the energy dissipation piers is arranged in an arc shape with the center of the water outlet of the flood discharge and sediment discharge tunnel as a center point, the number of energy dissipation piers in each row is gradually increased from the water outlet, the distance between each energy dissipation pier in the same row is the same, and the abrasion of the first row of energy dissipation piers with the largest water flow speed is reduced.

[0010] The energy dissipation device in the energy dissipation pool of the water conservancy project flood discharge and sediment discharge device is arranged in the form of a plurality of rows, each row of the energy dissipation piers is arranged in an arc shape with the center of the water outlet of the flood discharge and sediment discharge tunnel as a center point, the number of energy dissipation piers in each row is gradually increased from the water outlet, the distance between each energy dissipation pier in the same row is the same, and the abrasion of the first row of energy dissipation piers with the largest water flow speed is reduced.

[0011] The energy dissipation device in the energy dissipation pool of the water conservancy project flood discharge and sediment discharge device is arranged in the form of a plurality of rows, each row of the energy dissipation piers is arranged in an arc shape with the center of the water outlet of the flood discharge and sediment discharge tunnel as a center point, the number of energy dissipation piers in each row is gradually increased from the water outlet, the distance between each energy dissipation pier in the same row is the same, and the abrasion of the first row of energy dissipation piers with the largest water flow speed is reduced.

[0012] Compared with the prior art, the pipe hole section step, the energy dissipation device in the energy dissipation pool and the apron jointly constitute a triple energy dissipation mechanism for reducing water flow resistance, greatly improving the overall energy dissipation effect; at the same time, the energy dissipation pool size can be saved while ensuring the energy dissipation effect under the condition of limited site, the energy dissipation effect can be increased under the same site utilization condition, and the material consumption of the energy dissipation pier can be reduced as much as possible. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a front perspective structural schematic view of the utility model;

[0014] Figure 2 is a back perspective structural schematic view of the utility model;

[0015] Figure 3 is a limiting part structural schematic view of the utility model;

[0016] Figure 4 is a limiting part installation structural section view of the utility model;

[0017] Figure 5 is an energy dissipation pool bottom schematic view of the utility model.

[0018] The drawings are as follows: 1-flood discharge and sediment discharge tunnel, 2-discharge pool, 3-energy dissipation pool, 4-bankfull pool, 5-apron, 6-inlet, 7-pipe hole section, 8-water outlet, 9-step, 10-energy dissipation pier.

[0019] The utility model will be further explained in combination with the drawings and specific embodiments. EMBODIMENTS

[0020] The utility model discloses an embodiment 1: a water conservancy project flood discharge and sand discharge device, including flood discharge and sand discharge hole 1, flood discharge and sand discharge hole 1 connect upstream water source, the downstream end of flood discharge and sand discharge hole 1 is equipped with the spillway pool 2, the downstream end of spillway pool 2 is provided with the energy dissipation pool 3, the downstream end of energy dissipation pool 3 is provided with the sea bank pool 4, the connecting place between energy dissipation pool 3 and sea bank pool 4 is provided with the apron 5, and flood discharge and sand discharge hole 1, energy dissipation pool 3 and apron 5 jointly play the energy dissipation effect, improve the energy dissipation effect.

[0021] The utility model discloses an embodiment 2: a water conservancy project flood discharge and sand discharge device, including flood discharge and sand discharge hole 1, flood discharge and sand discharge hole 1 connect upstream water source, the downstream end of flood discharge and sand discharge hole 1 is equipped with the spillway pool 2, the downstream end of spillway pool 2 is provided with the energy dissipation pool 3, the downstream end of energy dissipation pool 3 is provided with the sea bank pool 4, the connecting place between energy dissipation pool 3 and sea bank pool 4 is provided with the apron 5, and flood discharge and sand discharge hole 1, energy dissipation pool 3 and apron 5 jointly play the energy dissipation effect, improve the energy dissipation effect.

[0022] Wherein, flood discharge and sand discharge hole 1 includes inlet 6, pipe hole section 7 and outlet 8, and inlet 6 and outlet 8 are placed at both ends of pipe hole section 7, inlet 6 is connected with upstream water source, outlet 8 is connected with spillway pool 2, and pipe hole section 7 is in multiple slopes as a whole. Figure 1 ∠α is greater than ∠β, which is beneficial to reduce the water flow impact force in pipe hole section 7 and improve the energy dissipation effect, the hole shape of pipe hole section 7 is circular and / or gate shape, and steps 9 are arranged on the hole bottom of pipe hole section 7, so as to buffer the water flow and improve the energy dissipation effect.

[0023] The utility model discloses an embodiment 2: a water conservancy project flood discharge and sand discharge device, including flood discharge and sand discharge hole 1, flood discharge and sand discharge hole 1 connect upstream water source, the downstream end of flood discharge and sand discharge hole 1 is equipped with the spillway pool 2, the downstream end of spillway pool 2 is provided with the energy dissipation pool 3, the downstream end of energy dissipation pool 3 is provided with the sea bank pool 4, the connecting place between energy dissipation pool 3 and sea bank pool 4 is provided with the apron 5, and flood discharge and sand discharge hole 1, energy dissipation pool 3 and apron 5 jointly play the energy dissipation effect, improve the energy dissipation effect.

[0024] Wherein, flood discharge and sand discharge hole 1 includes inlet 6, pipe hole section 7 and outlet 8, and inlet 6 and outlet 8 are placed at both ends of pipe hole section 7, inlet 6 is connected with upstream water source, outlet 8 is connected with spillway pool 2, and pipe hole section 7 is in multiple slopes as a whole. Figure 1 ∠α is greater than ∠β, which is beneficial to reduce the water flow impact force in pipe hole section 7 and improve the energy dissipation effect, the hole shape of pipe hole section 7 is circular and / or gate shape, and steps 9 are arranged on the hole bottom of pipe hole section 7, so as to buffer the water flow and improve the energy dissipation effect.

[0025] Wherein, the energy dissipation pool 3 is provided with energy dissipation piers 10, a plurality of energy dissipation piers 10 are arranged in multiple rows, each row of energy dissipation piers 10 is arranged in an arc shape with the center of the water outlet 8 of the flood discharge and sand discharge tunnel 1 as the center point, the number of energy dissipation piers 10 in each row is from less to more and then to less from the water outlet 8 as the starting point, the spacing of each energy dissipation pier 10 in the same row is the same, the first row of energy dissipation piers 10 with the largest water flow speed is reduced to reduce abrasion, the energy dissipation piers 10 are arranged in a wedge shape, the backwater surface of the energy dissipation piers 10 is wedge-shaped, so that the energy dissipation effect of the water surface is ensured while the material consumption of the energy dissipation piers 10 is reduced as much as possible.

[0026] Meanwhile, the bottom of the energy dissipation pool 3 is in a corrugated shape, the corrugated direction is parallel to the water direction, which is beneficial to sediment deposition and also helps to reduce the water flow speed.

[0027] The working principle of one embodiment of the utility model is as follows: when the upstream reservoir discharges flood and discharges sand, the water flow flows into the pipe hole section 7 along the water inlet 6, the pipe hole section 7 is a whole with multiple slopes, so as to reduce the water flow impact force in the pipe hole section 7 and preliminarily play the energy dissipation effect, meanwhile, the steps 9 at the bottom of the pipe hole section 7 can buffer the water flow, the buffered water flow enters the spillway pool 2 through the water outlet 8, flows through the spillway pool 2 and enters the energy dissipation pool 3, the energy dissipation piers 10 in the energy dissipation pool 3 reduce the water flow speed, a plurality of rows are arranged in an arc shape, so as to reduce the abrasion of the first row of energy dissipation piers 10, the energy dissipation piers 10 are arranged in a wedge shape, so that the energy dissipation effect of the water surface is ensured while the material consumption of the energy dissipation piers 10 is reduced as much as possible, meanwhile, the bottom of the energy dissipation pool 3 is in a corrugated shape, which is beneficial to sediment deposition and also helps to reduce the water flow speed, after the water flow passes through the energy dissipation pool 3, the water flow enters the sea apron pool 4 with a size larger than that of the energy dissipation pool 3, so as to further slow down the water flow speed.

Claims

1. A hydraulic flood discharge and sediment discharge device, characterized in that, The application relates to a flood discharge and sand discharge tunnel (1) connected with an upstream water source, a chute pool (2) arranged at the downstream end of the tunnel (1), an energy dissipation pool (3) arranged at the downstream end of the chute pool (2), a seawall pool (4) arranged at the downstream end of the energy dissipation pool (3), and a riprap (5) arranged at the joint between the energy dissipation pool (3) and the seawall pool (4).

2. The hydraulic engineering flood discharge and sand discharge device according to claim 1, characterized in that, The tunnel (1) comprises a water inlet (6), a tunnel section (7) and a water outlet (8), the water inlet (6) and the water outlet (8) are arranged at the two ends of the tunnel section (7), the water inlet (6) is connected with the upstream water source, and the water outlet (8) is connected with the chute pool (2).

3. The hydraulic engineering flood discharge and sand discharge device according to claim 2, characterized in that, The tunnel section (7) is composed of multiple sections with different slopes, and the slope of the upstream side of the tunnel section (7) is greater than that of the downstream side.

4. The hydraulic engineering flood discharge and sand discharge device according to claim 3, characterized in that, The tunnel section (7) is circular and / or in the shape of a city gate.

5. The hydraulic engineering flood discharge and sand discharge device according to claim 4, characterized in that, The tunnel section (7) is provided with a step (9) at the bottom.

6. The hydraulic engineering flood discharge and sand discharge device according to claim 2, characterized in that, The energy dissipation pool (3) is provided with energy dissipation piers (10), the energy dissipation piers (10) are arranged in multiple rows, each row of the energy dissipation piers (10) is arranged in an arc shape with the center of the water outlet (8) of the tunnel (1) as the center point, the number of the energy dissipation piers (10) in each row increases from the water outlet (8) to the maximum and then decreases, and the distance between the energy dissipation piers (10) in the same row is the same.

7. The hydraulic engineering flood discharge and sand discharge device according to claim 6, characterized in that, The energy dissipation piers (10) are arranged in a wedge shape, and the backwater surface of the energy dissipation piers (10) is wedge-shaped.

8. The hydraulic engineering flood discharge and sand discharge device according to claim 7, characterized in that, The bottom of the energy dissipation pool (3) is in a corrugated shape, and the corrugated direction is parallel to the water flow direction.

Images