CN220666152U - Arrangement structure of vertical shaft type spillway - Google Patents
Arrangement structure of vertical shaft type spillway Download PDFInfo
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- CN220666152U CN220666152U CN202322243003.5U CN202322243003U CN220666152U CN 220666152 U CN220666152 U CN 220666152U CN 202322243003 U CN202322243003 U CN 202322243003U CN 220666152 U CN220666152 U CN 220666152U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 78
- 238000009792 diffusion process Methods 0.000 claims description 33
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The utility model relates to an arrangement structure of a shaft type spillway. The utility model is suitable for the technical field of hydropower station engineering. The utility model aims to solve the technical problems that: an arrangement structure of a shaft spillway is provided. The technical scheme adopted by the utility model is as follows: an arrangement structure of a shaft type spillway is characterized in that: the energy dissipation device comprises an overflow weir, a vertical shaft, an energy dissipation well, a water return tunnel and a wake energy dissipation structure, wherein the bottom of the overflow weir is connected with the vertical shaft with a circular cross section, the bottom of the vertical shaft is connected with the energy dissipation well with a horseshoe cross section, the joint of the vertical shaft and the energy dissipation well is provided with a water inlet end of the water return tunnel, and a water outlet end of the water return tunnel is connected with the wake energy dissipation structure.
Description
Technical Field
The utility model relates to the technical field of hydropower station engineering, in particular to an arrangement structure of a vertical shaft type spillway.
Background
In recent years, the vertical shaft spillway has the characteristics of wide application range, simple structure and flexible arrangement mode, and is increasingly widely applied to pumped storage power stations.
At present, the hydraulic characteristics of the connecting section of the vertical shaft and the open flow tunnel in the conventional vertical shaft type spillway arrangement structure are quite complex, and particularly under the high-water-head operation condition, the continuous fluctuation of the water surface in the whole open flow tunnel can be caused by the complex water flow state of the connecting section, the flow state is unstable, and the structural safety of the open flow tunnel section is severely tested.
Disclosure of Invention
The utility model aims to solve the technical problems that: in order to solve the problems, the arrangement structure of the vertical shaft spillway is provided.
The technical scheme adopted by the utility model is as follows: an arrangement structure of a shaft type spillway is characterized in that: the energy dissipation device comprises an overflow weir, a vertical shaft, an energy dissipation well, a water return tunnel and a wake energy dissipation structure, wherein the bottom of the overflow weir is connected with the vertical shaft with a circular cross section, the bottom of the vertical shaft is connected with the energy dissipation well with a horseshoe cross section, the joint of the vertical shaft and the energy dissipation well is provided with a water inlet end of the water return tunnel, and a water outlet end of the water return tunnel is connected with the wake energy dissipation structure.
Through the technical means, the water-withdrawing tunnel is connected to the joint of the vertical shaft and the energy dissipation well, and the cross section shape from the vertical shaft to the energy dissipation well is expanded into a horseshoe shape from a circle, so that compared with the conventional energy dissipation well with the circular cross section, the arrangement can enable the aeration in the energy dissipation well to be more sufficient, and the water-falling flow forms a relatively stable water jump on the bottom plate of the energy dissipation well, thereby improving the water flow energy dissipation efficiency.
In some embodiments, the wall surface of the junction of the water-withdrawing tunnel and the vertical shaft and the wall surface of the junction of the water-withdrawing tunnel and the energy dissipation well are both in the form of elliptic curves.
Through the technical means, on one hand, the wall surface in the form of the elliptic curve can reduce the water pressure of water flow between the vertical shaft and the water-withdrawing tunnel and between the energy dissipation well and the water-withdrawing tunnel, so that damage to the wall surface caused by overlarge water pressure is avoided, and on the other hand, the wall surface in the form of the elliptic curve can buffer the flow velocity of high-speed water flow between the energy dissipation well and the water-withdrawing tunnel, so that the water flow is gradually stable, and the energy dissipation effect and the structural safety are improved.
In some embodiments, a wall surface of the junction of the water-return tunnel and the vertical shaft is provided with a slope pressing section, and the length of the slope pressing section is 4 times of the diameter of the water-return tunnel.
Through the technical means, the water level is controlled by the slope pressing section, so that the water flow state can be adjusted, the flow speed of water flow can be reduced, and the energy dissipation effect is improved.
In some embodiments, the drop tunnel is provided with a corner having a turning radius 30 times the drop tunnel diameter.
Through the technical means, the corner arranged in the water-return tunnel increases the complexity of the drainage process, so that the water flow is effectively prevented from directly flushing the tunnel wall surface, the water flow is buffered and the drainage is facilitated, the turning radius of the water-return tunnel is determined according to the path of the water-return tunnel, and the water flow drift phenomenon caused by turning of the tunnel can be effectively slowed down.
In some embodiments, the overflow weir is an annular weir, and a flow dividing pier is further arranged on the weir body of the annular weir, and divides the annular weir into a plurality of areas.
Through the technical means, the water flow is dispersed to each area by the diversion piers, and the water flow before entering the vertical shaft can be flattened.
In some embodiments, the wake energy dissipation structure comprises an open channel diffusion section and a stilling pool, wherein the open channel diffusion section is connected to the water outlet end of the water return tunnel, and the stilling pool is connected to the open channel diffusion section.
Through the technical means, the open channel diffusion section can diffuse water flow, the single-width flow is reduced, the flow speed of the water flow flowing out of the water return tunnel is reduced, and the relief pool can enable the downward leakage rapid flow to eliminate water leaps in the pool, so that the purpose of energy dissipation is achieved.
In some embodiments, the slope of the water-withdrawal tunnel is 4% -5% and the diffusion angle of the open channel diffusion section is 10 °.
Through the technical means, the slope of the water return tunnel can guide water flow, the slope of the water return tunnel is matched with the diffusion angle of the open channel diffusion section, the arrangement form can form the diversion water, the expansion of the water tongue is increased, the energy dissipation efficiency of the outlet is improved, and the flow state in the absorption basin is obviously improved.
In some embodiments, the tail of the stilling pool is provided with a tail ridge and a rear extension guard.
By the technical means, energy-dissipation buffering is formed, energy is continuously dissipated to the slow-flow area, the subsequent downstream riverbed is protected, and the subsequent downstream riverbed is prevented from being subjected to strong impact.
The other technical scheme adopted by the utility model is as follows: an arrangement structure of a shaft type spillway is characterized in that: the energy dissipation device comprises an overflow weir, a vertical shaft, an energy dissipation well, a water return tunnel and a wake energy dissipation structure, wherein the bottom of the overflow weir is connected with the vertical shaft with a circular cross section, the bottom of the vertical shaft is connected with the energy dissipation well with a horseshoe cross section, the joint of the vertical shaft and the energy dissipation well is provided with a water inlet end of the water return tunnel, and a water outlet end of the water return tunnel is connected with the wake energy dissipation structure;
the wall surface of the junction of the water-withdrawing tunnel and the vertical shaft and the wall surface of the junction of the water-withdrawing tunnel and the energy dissipation well are in elliptic curve forms;
the wall surface of the junction of the water-return tunnel and the vertical shaft is provided with a slope pressing section, and the length of the slope pressing section is 4 times of the diameter of the water-return tunnel;
the water-return tunnel is provided with a corner, and the turning radius of the corner is 30 times of the diameter of the water-return tunnel;
the overflow weir is an annular weir, a weir body of the annular weir is also provided with a diversion pier, and the diversion pier divides the annular weir into a plurality of areas;
the wake energy dissipation structure comprises an open channel diffusion section and a force dissipation tank, wherein the open channel diffusion section is connected with the water outlet end of the water return tunnel, and the force dissipation tank is connected with the open channel diffusion section;
the gradient of the water return tunnel is 4-5%, and the diffusion angle of the open channel diffusion section is 10 degrees;
the tail part of the stilling pool is provided with a tail ridge and a rear extension guard.
The beneficial effects of the utility model are as follows:
1. through the cross section shape design of shaft to the energy dissipation well is for expanding into the horseshoe shape by the circle, and special shape structure can avoid rivers to produce vortex and unstable flow state in the energy dissipation well, for conventional circular energy dissipation well bottom plate arrangement form, this arrangement can make the aeration more abundant in the energy dissipation well to increase the energy dissipation effect of the rivers between shaft, energy dissipation well and the water-return tunnel, effectively guaranteed the stability of flow state in the open flow tunnel section and the structural security thereof.
2. Through setting up the elliptic curve form is personally submitted to two junction walls of water-withdrawal tunnel and shaft and water-withdrawal tunnel and energy dissipation well, makes the water conservancy characteristic in its junction section tend to be stable, and stable flow state can avoid high-speed rivers to strike junction and influence open cut tunnel section structural security.
3. The turning angle and the gradient of the water return tunnel are reasonably arranged in combination with the tunnel diameter, so that the rapid flow inside the tunnel section tends to be gentle, then the open channel diffusion section is matched to enable the water flow flowing out of the tunnel section to form the water flow to be selected, the energy dissipation efficiency of the water outlet is improved, the integral arrangement structure utilizes the open channel diffusion section to realize the flow selection energy dissipation and utilizes the stilling pool to realize the underflow energy dissipation, and the better water flow energy dissipation effect is realized.
Drawings
Fig. 1 is a schematic plan view of an arrangement structure of a shaft type spillway according to an embodiment.
Fig. 2 is a schematic cross-sectional layout of an arrangement of a shaft spillway according to an embodiment.
Fig. 3 is a schematic cross-sectional view of the shaft of fig. 2 taken along the line E-E.
Fig. 4 is a schematic cross-sectional view of the energy dissipating well of fig. 2 along F-F.
Reference numerals illustrate:
1. an overflow weir; 2. a split pier; 3. an energy dissipation vertical shaft; 4. a water-withdrawal tunnel; 5. an open channel diffusion section; 6. a stilling pool; 7. and a vent hole.
Detailed Description
In order to make the person skilled in the art better understand the solution of the present utility model, the following describes the solution of the present utility model with reference to specific embodiments.
Referring to fig. 1 to 4, this embodiment is an arrangement structure of a shaft type spillway, including a vortex-preventing guide wall, a overflow weir 1, a diversion pier 2, an energy dissipation shaft 3, a water return tunnel 4, and a wake energy dissipation structure, in this embodiment, the overflow weir 1 is an annular free overflow weir 1, a vortex-preventing guide wall and a diversion pier 2 are disposed on the weir body, the diversion pier 2 is a concrete diversion pier 2, the annular free overflow weir 1 is divided into 6 areas averagely by the diversion pier 2, the vortex-preventing guide wall is used for preventing water flow from generating vortex on the weir surface, thereby avoiding energy waste, the diversion pier 2 is used for dispersing water flow, thereby avoiding generating excessive impact force, the bottom of the overflow weir 1 is connected with the energy dissipation shaft 3, the side wall of the energy dissipation shaft 3 is connected with the water inlet end of the water return tunnel 4, and the water outlet end of the water return tunnel 4 is connected with the wake energy dissipation structure.
Further, the energy dissipation shaft 3 includes shaft and energy dissipation well, the shaft top connects in overflow weir 1 bottom, the shaft bottom connects the energy dissipation well, the shaft transversal is circular, the energy dissipation well transversal is horseshoe-shaped, the junction of shaft and energy dissipation well is equipped with the water inlet end of water return tunnel 4, the upper wall face and the shaft of water inlet end of water return tunnel 4 meet, the lower wall face and the energy dissipation well of water inlet end of water return tunnel 4 meet, the water inlet end of water return tunnel 4 is faced to its sharp limit lateral wall of water dissipation well of horseshoe, the upper and lower wall face of water inlet end of water return tunnel 4 all is elliptic curve form, and the upper wall face of water return tunnel 4 and shaft junction is equipped with the pressure slope section, can possess better stationary flow effect and make the drainage ripple little through setting up the pressure slope section, be equipped with the steel pipe in the reposition of redundant personnel mound 2 on overflow weir 1, the inside formation 7 of steel pipe, air vent 7 extends to the pressure slope section downwards through the interior of shaft lateral wall, air vent 7 and is by the pressure slope section in 4, the water return section 4 has a high grade, the water return 4.0% is carried out in the tunnel 4.0% and the water return 4.0% is high grade, the water outlet 4.0% is realized to the water outlet 4.0% of the water in the water channel, the water outlet 4% and the water outlet 4% is high grade.
Further, the wake flow energy dissipation structure comprises an open channel diffusion section 5 and a stilling pool 6, the open channel diffusion section 5 is connected to the water outlet end of the water return tunnel 4, the open channel diffusion section 5 is provided with a 10-degree diffusion angle to form a wake flow energy dissipation mode, the water flow energy dissipation efficiency of the water outlet end of the water return tunnel 4 can be improved, the stilling pool 6 is connected to the open channel diffusion section 5, the stilling pool 6 is arranged symmetrically in the middle, large-scale backflow in the pool can be avoided, the tail of the stilling pool 6 is provided with a tail ridge, and the stilling pool 6 is connected with a long guard, and then connected to a stream.
The model example data of the arrangement structure of the shaft type spillway in the embodiment is as follows, the total length of the shaft type spillway is 565.30m, the height of the weir top of the annular free overflow weir 1 is 237.00m and is the same as the normal water storage level, the height of the dead water level is 202.00m, the width of the split pier 2 on the weir body is 2.41m, the width of each area formed by splitting the annular weir by the split pier 2 is 2.28m, and the total width is 13.68m;
the cross section of the vertical shaft is circular, the diameter of the vertical shaft is 5.00m, the maximum drop of the vertical shaft is 77.40m, the cross section of the energy dissipation well extends 2m from the circular cross section of the vertical shaft to the water outlet end of the water return tunnel 4 so as to form a horseshoe shape, and the depth of the energy dissipation well is 12m;
the height of the water inlet end of the water-return tunnel 4 is 158.60m, the height of the water outlet end of the water-return tunnel 4 is 134.00m, the clearance size of the water-return tunnel 4 is 3.50m×5.30m (width×height), the length of a pressure slope section is 4 times of the diameter of the water-return tunnel 4, the length of the pressure slope section is 22.50m, the turning radius of a turning section of the water-return tunnel 4 is 30 times of the diameter of the water-return tunnel 4, and the turning section of the water-return tunnel 4 is a circular arc section with the radius of 150m and the radian of 14.5 degrees;
the water outlet end of the water-return tunnel 4 is connected with an open channel diffusion section 5 with the length of 10m, the open channel diffusion section 5 is connected with a stilling pool 6 with the length of 40.00m and the width of 35.00m, the height of the bottom plate is 122.0m, the height of a tail ridge arranged at the tail part of the stilling pool 6 is 130.00m, and the stilling pool 6 is also connected with a long guard bar with the length of 10.00m and is led into a stream.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (9)
1. An arrangement structure of a shaft type spillway is characterized in that: including overflow weir (1), shaft, energy dissipation well, water-withdrawal tunnel (4), wake energy dissipation structure, the cross section has been connect to overflow weir (1) bottom and has been connect the energy dissipation well that the cross section is the horseshoe shape, and the shaft links up the water inlet that department was equipped with water-withdrawal tunnel (4) with the energy dissipation well, and water-withdrawal tunnel (4) play water termination has wake energy dissipation structure.
2. The arrangement of shaft spillways of claim 1, wherein: the wall surface of the junction of the water-withdrawing tunnel (4) and the vertical shaft and the wall surface of the junction of the water-withdrawing tunnel (4) and the energy dissipation well are both in elliptic curve form.
3. The arrangement of shaft spillways of claim 1, wherein: the wall surface of the junction of the water return tunnel (4) and the vertical shaft is provided with a slope pressing section, and the length of the slope pressing section is 4 times of the diameter of the water return tunnel (4).
4. The arrangement of shaft spillways of claim 1, wherein: the water return tunnel (4) is provided with a corner, and the turning radius of the corner is 30 times of the diameter of the water return tunnel (4).
5. The arrangement of shaft spillways of claim 1, wherein: the overflow weir (1) is an annular weir, a flow dividing pier (2) is further arranged on the weir body of the annular weir, and the flow dividing pier (2) divides the annular weir into a plurality of areas.
6. The arrangement of shaft spillways of claim 1, wherein: the wake energy dissipation structure comprises an open channel diffusion section (5) and a force dissipation tank (6), wherein the open channel diffusion section (5) is connected to the water outlet end of the water return tunnel (4), and the force dissipation tank (6) is connected to the open channel diffusion section (5).
7. The arrangement of shaft spillways of claim 6, wherein: the gradient of the water return tunnel (4) is 4% -5%, and the diffusion angle of the open channel diffusion section (5) is 10 degrees.
8. The arrangement of shaft spillways of claim 6, wherein: the tail part of the stilling pool (6) is provided with a tail ridge and a rear extension guard bar.
9. An arrangement structure of a shaft type spillway is characterized in that: the energy dissipation device comprises an overflow weir (1), a vertical shaft, an energy dissipation well, a water-return tunnel (4) and a wake energy dissipation structure, wherein the bottom of the overflow weir (1) is connected with the vertical shaft with a circular cross section, the bottom of the vertical shaft is connected with the energy dissipation well with a horseshoe cross section, the joint of the vertical shaft and the energy dissipation well is provided with a water inlet end of the water-return tunnel (4), and a water outlet end of the water-return tunnel (4) is connected with the wake energy dissipation structure;
the wall surface of the junction of the water-return tunnel (4) and the vertical shaft and the wall surface of the junction of the water-return tunnel (4) and the energy dissipation well are in elliptic curve forms;
the wall surface of the junction of the water-return tunnel (4) and the vertical shaft is provided with a slope pressing section, and the length of the slope pressing section is 4 times of the diameter of the water-return tunnel (4);
the water return tunnel (4) is provided with a corner, and the turning radius of the corner is 30 times of the hole diameter of the water return tunnel (4);
the overflow weir (1) is an annular weir, a flow dividing pier (2) is further arranged on the weir body of the annular weir, and the flow dividing pier (2) divides the annular weir into a plurality of areas;
the wake flow energy dissipation structure comprises an open channel diffusion section (5) and a force dissipation tank (6), wherein the open channel diffusion section (5) is connected to the water outlet end of the water return tunnel (4), and the force dissipation tank (6) is connected to the open channel diffusion section (5);
the gradient of the water return tunnel (4) is 4-5%, and the diffusion angle of the open channel diffusion section (5) is 10 degrees;
the tail part of the stilling pool (6) is provided with a tail ridge and a rear extension guard bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322243003.5U CN220666152U (en) | 2023-08-18 | 2023-08-18 | Arrangement structure of vertical shaft type spillway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322243003.5U CN220666152U (en) | 2023-08-18 | 2023-08-18 | Arrangement structure of vertical shaft type spillway |
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| Publication Number | Publication Date |
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| CN220666152U true CN220666152U (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322243003.5U Active CN220666152U (en) | 2023-08-18 | 2023-08-18 | Arrangement structure of vertical shaft type spillway |
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| CN (1) | CN220666152U (en) |
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2023
- 2023-08-18 CN CN202322243003.5U patent/CN220666152U/en active Active
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