Underground regulating pond with energy dissipation structure

Abstract

The present invention discloses an underground regulating pool with an energy dissipation structure, including a power station. A plurality of tail water outlets are provided on the power station. The underground regulating pool also includes a regulating pool chamber arranged below the ground surface, and the regulating pool chamber is located downstream of the power station. The regulating pool chamber is communicated with the tail water outlets of the power station through a plurality of energy dissipation chambers, and an energy dissipation structure is arranged in the energy dissipation chambers. By improving the structure of the underground regulating pool, the present invention adds energy dissipation chambers between the chamber of the underground regulating pool and the surface power station, and uses the energy dissipation structure in the energy dissipation chambers to dissipate the energy of the tail water flow flowing out from the tail water outlets of the power station, thereby effectively reducing the falling potential energy of the tail water flow of the power station and reducing the impact of the tail water of the power station on the water flow in the chamber after entering the chamber of the underground regulating pool, being able to avoid the disorder of the water flow in the chamber of the underground regulating pool and ensure the normal progress of the work of the underground regulating pool in controlling the inflow and outflow water volume of the power station.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic structures, and in particular to an underground regulating reservoir with an energy dissipation structure. Background Art

[0002] A regulating reservoir can regulate the inlet and outlet flow rates of a power station. Generally, regulating reservoirs are installed on the ground. If a regulating reservoir is installed on the ground, it is easy to damage the ecological environment. An underground regulating reservoir built underground can avoid the impact on the surface environment.

[0003] When an underground regulating reservoir controls the inlet and outlet flow rates of a power station, since the power station is installed on the ground surface and there is a large elevation difference between the underground regulating reservoir and the power station, the falling potential energy of the tail water flowing from the power station into the underground regulating reservoir is large, and it is easy to cause the water flow in the underground regulating reservoir to be disordered, seriously affecting the flow regulation function of the underground regulating reservoir. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide an underground regulating reservoir with an energy dissipation structure, which can dissipate the energy of the tail water flow falling from the surface power station and ensure the smooth water flow in the underground regulating reservoir.

[0005] The technical solution adopted by the present invention to solve the above technical problem is: an underground regulating reservoir with an energy dissipation structure, including a power station, on which there are a plurality of tail water outlets, and further including a regulating reservoir chamber arranged below the ground surface, the regulating reservoir chamber being located downstream of the power station; the regulating reservoir chamber is communicated with the tail water outlets of the power station through a plurality of energy dissipation chambers, and an energy dissipation structure is arranged in the energy dissipation chambers.

[0006] Further: the energy dissipation structure is composed of multi-stage stepped energy dissipators arranged on the bottom surface of the energy dissipation chamber, and the stepped energy dissipators are laid step by step from the power station direction to the regulating reservoir chamber direction in the energy dissipation chamber, and the height of each stage of stepped energy dissipator decreases step by step.

[0007] Further: there are also energy dissipation piers arranged on the stepped energy dissipators, and the energy dissipation piers correspond to the stepped energy dissipators one by one, and each stage of stepped energy dissipator is fixed with an energy dissipation pier; the energy dissipation piers extend along the length direction of the stepped energy dissipators to both ends of the stepped energy dissipators.

[0008] Further: the energy dissipation piers are arranged at the edges of the junction of the corresponding stepped energy dissipator and the next stage of stepped energy dissipator.

[0009] Further: the height of the energy dissipation piers decreases synchronously with the height of each stage of stepped energy dissipator.

[0010] Further: there is also a slope arranged on the energy dissipation piers, and the slope is arranged on the inner side of the energy dissipation piers.

[0011] Further: It further includes a tailrace tunnel arranged between the energy dissipation chamber and the power station, and both ends of the tailrace tunnel are respectively communicated with the tailrace outlet of the power station and the energy dissipation chamber.

[0012] Further: It further includes a tailrace gate arranged at the junction of the tailrace tunnel and the energy dissipation chamber.

[0013] Further: The tailrace tunnel extends horizontally from the tailrace outlet of the power station to the tailrace gate, and the bottom elevation of the tailrace tunnel is higher than the elevation of the first-stage drop energy dissipator.

[0014] Further: The regulating pool chamber is composed of a plurality of horizontally and vertically arranged transverse chambers and longitudinal chambers that are communicated with each other.

[0015] The beneficial effects of the present invention are as follows: By improving the structure of the underground regulating pool, an energy dissipation chamber is added between the chamber of the underground regulating pool and the surface power station. The energy dissipation structure in the energy dissipation chamber is used to dissipate the energy of the tailwater flow flowing out from the tailwater outlet of the power station, thereby effectively reducing the falling potential energy of the tailwater flow of the power station and reducing the impact on the water flow in the chamber after the tailwater of the power station enters the chamber of the underground regulating pool. It can avoid the disorder of the water flow in the chamber of the underground regulating pool and ensure the normal progress of the work of the underground regulating pool in controlling the inflow and outflow of the power station. Description of the Drawings

[0016] Figure 1 is a sectional view of the present invention;

[0017] Figure 2 is a top view of the present invention.

[0018] The markings in the figure are: 100 - power station, 200 - regulating pool chamber, 300 - energy dissipation chamber, 410 - drop energy dissipator, 420 - energy dissipation pier, 500 - tailrace tunnel, 600 - tailrace gate. Detailed Embodiments

[0019] For the convenience of understanding the present invention, the present invention will be further described below with reference to the drawings.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] Such as Figure 1 and Figure 2As shown in the figure, the underground regulating pool with an energy dissipation structure disclosed by the present invention includes a power station 100, a regulating pool chamber 200, and an energy dissipation chamber 300. The power station 100 is arranged on the ground surface, and the power station 100 is provided with a plurality of tail water outlets for discharging the generated tail water; the regulating pool chamber 200 is arranged below the ground surface, and the regulating pool chamber 200 is connected to the tail water outlets of the power station 100 through the energy dissipation chamber 300. The energy dissipation chamber 300 and the tail water outlets of the power station 100 are in a one-to-one correspondence relationship, and each tail water outlet of the power station 100 is respectively connected to an energy dissipation chamber 300. Since the power station 100 is arranged on the ground surface while the regulating pool chamber 200 is arranged below the ground surface, there is a large elevation difference between the power station 100 and the regulating pool chamber 200. The generated tail water flowing from the power station 100 to the regulating pool chamber 200 has a high falling potential energy. If the generated tail water is not subjected to energy dissipation treatment, the water flow in the regulating pool chamber 200 will be disordered. Therefore, the present invention is provided with an energy dissipation structure in the energy dissipation chamber 300 to buffer and dissipate the falling generated tail water, thereby reducing the impact of the generated tail water on the water flow in the regulating pool chamber 200.

[0022] As Figure 1 and Figure 2 shown in the figure, the energy dissipation structure adopted in the energy dissipation chamber 300 of the present invention is composed of a multi-stage drop energy dissipator 410 arranged on the bottom surface of the energy dissipation chamber 300. The drop energy dissipator 410 is laid step by step in the energy dissipation chamber 300 from the direction of the power station 100 to the direction of the regulating pool chamber 200, and the height of each stage of the drop energy dissipator 410 decreases step by step. The generated tail water entering the energy dissipation chamber 300 from each tail water outlet of the power station 100 falls onto each stage of the drop energy dissipator 410 in turn during the falling process and is buffered and dissipated by each stage of the drop energy dissipator 410. When the generated tail water enters the regulating pool chamber 200, the impact force on the water flow in the regulating pool chamber 200 is greatly reduced. Finally, the generated tail water flows steadily into the regulating pool chamber 200, avoiding the formation of turbulent flow in the regulating pool chamber 200 and affecting the normal regulating function of the regulating pool chamber 200.

[0023] In order to further improve the energy dissipation effect of the power generation tail water, in the present invention, the structure of the drop energy dissipator 410 is optimized, and energy dissipation piers 420 are added to the drop energy dissipator 410. One energy dissipation pier 420 is fixed on each stage of the drop energy dissipator 410, and the energy dissipation pier 420 extends along the length direction of the drop energy dissipator 410 to both ends of the drop energy dissipator 410; the energy dissipation pier 420 can be integrally cast with the drop energy dissipator 410 to improve the strength of the overall structure. By adding the energy dissipation piers 420 to each stage of the drop energy dissipator 410, the power generation tail water falling on each stage of the drop energy dissipator 410 can be further blocked and dissipated. When the power generation tail water falls on the drop energy dissipator 410 and flows along the surface of the drop energy dissipator 410 to the energy dissipation pier 420, the energy dissipation pier 420 blocks it in the flowing direction of the power generation tail water, slows down the flow rate of the power generation tail water, and makes the power generation tail water gather on each stage of the drop energy dissipator 410. When the water level of the power generation tail water gathered on the upper-stage drop energy dissipator 410 is higher than the height of the energy dissipation pier 420, the power generation tail water will overflow from the energy dissipation pier 420 to the next-stage drop energy dissipator 410, and then the above-mentioned buffering and energy dissipation work will be gradually repeated on each stage of the drop energy dissipator 410 until it enters the regulating pool chamber 200, thereby realizing further buffering and energy dissipation of the power generation tail water.

[0024] As Figure 1 shown, the best setting position of the energy dissipation pier 420 is to be set at the edge of the drop energy dissipator 410, that is, the energy dissipation pier 420 is set at the edge of the junction of the corresponding drop energy dissipator 410 and the next-stage drop energy dissipator 410; in this way, the largest water-collecting space can be left on each stage of the drop energy dissipator 410, and the power generation tail water has sufficient buffering paths and buffering time on each stage of the drop energy dissipator 410, making the drop energy dissipation process of the power generation tail water smoother and conducive to improving the energy dissipation effect of the power generation tail water.

[0025] The height of the energy dissipation piers 420 on each stage of the drop energy dissipator 410 should be gradually reduced, so that the height of the energy dissipation piers 420 is synchronously reduced with the height of each stage of the drop energy dissipator 410, and a more stable energy dissipation effect can be achieved.

[0026] When the energy dissipation pier 420 blocks and buffers the power generation tail water flowing on each stage of the drop energy dissipator 410, it will be subjected to a large impact force from the power generation tail water. As Figure 1 shown, in the present invention, the surface of the energy dissipation pier 420 in direct contact with the power generation tail water is set as a slope surface, that is, a slope surface is provided on the inner side of the energy dissipation pier 420, so that an obtuse angle is formed between the energy dissipation pier 420 and the drop energy dissipator 410, and a smooth transition is formed between the energy dissipation pier 420 and the drop energy dissipator 410, which can conform to the flowing direction of the power generation tail water, reduce the direct impact force of the power generation tail water on the energy dissipation pier 420 while blocking and buffering the power generation tail water, and is conducive to improving the service life of the entire energy dissipation structure.

[0027] AsFigure 1 and Figure 2 As shown, a tailrace tunnel 500 is also added between each energy dissipation chamber 300 and each tailwater outlet of the power station 100 in the present invention. Both ends of the tailrace tunnel 500 are respectively communicated with the tailwater outlet of the power station 100 and the energy dissipation chamber 300; the tailrace tunnel 500 horizontally extends from the tailwater outlet of the power station 100 to the tailwater gate 600, and the bottom elevation of the tailrace tunnel 500 is higher than the elevation of the first-stage hydraulic jump energy dissipator 410, so that the generated tailwater discharged from the tailwater outlet of the power station 100 can smoothly flow into the energy dissipation chamber through the tailrace tunnel 500, and the transition between the tailwater outlet of the power station 100 and the energy dissipation chamber 300 is realized through the tailrace tunnel 500; the length of the tailrace tunnel 500 is set according to the actual engineering situation. A tailwater gate 600 can also be arranged between the tailrace tunnel 500 and the energy dissipation chamber 300 to control the flow rate of the generated tailwater flowing from the tailwater outlet of the power station 100 into the energy dissipation chamber 300, and adjust it when the flow rate of the generated tailwater is too large to avoid the flow rate of the generated tailwater exceeding the efficiency load of the energy dissipation structure.

[0028] The regulating pond chamber 200 in the present invention can adopt a separate underground chamber structure, or the number of chambers can be increased according to the flow rate regulation requirements of the generated tailwater of the power station 100. If a multi-stage power station is adopted, the regulating pond chamber 200 composed of multiple horizontally and vertically arranged transverse chambers and longitudinal chambers connected to each other can also be used to realize the series connection with the multi-stage power station.

Claims

1. An underground regulating pond with an energy dissipation structure, comprising a power station (100), wherein a plurality of tail water outlets are provided on the power station (100), and it is characterized in that: It further includes a regulating pond chamber (200) arranged below the ground surface, and the regulating pond chamber (200) is located in the downstream direction of the power station (100); the regulating pond chamber (200) is communicated with the tail water outlet of the power station (100) through a plurality of energy dissipation chambers (300), and an energy dissipation structure is arranged in the energy dissipation chamber (300); The energy dissipation structure is composed of multi-stage stepped energy dissipators (410) arranged on the bottom surface of the energy dissipation chamber (300), and the stepped energy dissipators (410) are laid step by step in the energy dissipation chamber (300) from the direction of the power station (100) to the direction of the regulating pond chamber (200), and the height of each stage of stepped energy dissipator (410) decreases step by step; It further includes energy dissipation piers (420) arranged on the stepped energy dissipators (410), and the energy dissipation piers (420) correspond to the stepped energy dissipators (410) one by one, and one energy dissipation pier (420) is fixed on each stage of stepped energy dissipator (410); the energy dissipation piers (420) extend along the length direction of the stepped energy dissipators (410) to both ends of the stepped energy dissipators (410); the energy dissipation piers (420) are arranged at the edge of the junction of the corresponding stepped energy dissipator (410) and the next stage of stepped energy dissipator (410); the height of the energy dissipation piers (420) decreases synchronously with the height of each stage of stepped energy dissipator (410); It further includes a slope arranged on the energy dissipation piers (420), and the slope is arranged on the inner side of the energy dissipation piers (420); It further includes a tail water tunnel (500) arranged between the energy dissipation chamber (300) and the power station (100), and both ends of the tail water tunnel (500) are respectively communicated with the tail water outlet of the power station (100) and the energy dissipation chamber (300); It further includes a tail water gate (600) arranged at the junction of the tail water tunnel (500) and the energy dissipation chamber (300); the tail water tunnel (500) extends horizontally from the tail water outlet of the power station (100) to the tail water gate (600), and the bottom elevation of the tail water tunnel (500) is higher than the elevation of the first-stage stepped energy dissipator (410); The regulating pond chamber (200) is composed of a plurality of horizontally and vertically arranged transverse chambers and longitudinal chambers communicated with each other.

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