CN201952787U - Shaft well swirling flow energy dissipating and flood discharging hole for diving swirling flow generation pier - Google Patents

Shaft well swirling flow energy dissipating and flood discharging hole for diving swirling flow generation pier Download PDF

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Publication number
CN201952787U
CN201952787U CN201020518550XU CN201020518550U CN201952787U CN 201952787 U CN201952787 U CN 201952787U CN 201020518550X U CN201020518550X U CN 201020518550XU CN 201020518550 U CN201020518550 U CN 201020518550U CN 201952787 U CN201952787 U CN 201952787U
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China
Prior art keywords
energy dissipating
flood discharging
pier
swirling flow
vertical shaft
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Expired - Lifetime
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CN201020518550XU
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Chinese (zh)
Inventor
刘林军
郭建设
方劲
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Guangdong Hydropower Planning & Design Institute
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Guangdong Hydropower Planning & Design Institute
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Priority to CN201020518550XU priority Critical patent/CN201952787U/en
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Abstract

The utility model discloses a shaft well swirling flow energy dissipating and flood discharging hole for diving swirling flow generation piers, which relates to a non-gate controlled reservoir flood discharging form in hydraulic power engineering. The flood discharging hole is formed by a water inlet, a shaft well, a horizontal tunnel and an outlet tunnel segment successively connected with each other. The outside of the annular weir of the water inlet is symmetrically equipped with a plurality of swirling flow generation piers and the included angle of each of the swirling flow generation piers with the tangent of the outside of the annular weir is smaller than 150 degrees. By utilizing the swirling flow generation piers, stable swirling flow motion with air cavities can be generated inside the annular weir and the shaft well. The negative pressure on the wall surfaces of the overflow weir and the shaft well is eliminated by means of the swirling flow centrifugal force and the mixed large amount of air and the cavitation corrosion of structural objects is avoided. Meanwhile, the energy dissipating rate is improved, which is greater than 80%. The flow velocity at the outlet tunnel segment is lowered to about 15m/s.

Description

Submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel
[technical field]
The utility model relates to a kind of reservoir spillway form of not having gate control in the Hydraulic and Hydro-Power Engineering.
[background technology]
In Hydraulic and Hydro-Power Engineering, when the reservoir water retaining structure is earth and rockfill dam, normal flood spillway or the flood discharge of adopting of flood discharging tunnel mode, but it is steeper to work as dam site two sides landform, when not possessing the flood spillway of doing condition, often select to adopt the flood discharging tunnel mode, and often arrange in conjunction with the construction diversion hole.
Present flood discharging tunnel has the ring dam of employing drilled shaft flood discharge hole, but its flow and head are all little.The current segregation phenomenon often occurs and produce very big negative pressure along with overflow weir and vertical shaft wall appear in project scale upgrading, particularly because the influence of excavation slope, whirlpool appears in water inlet to be influenced discharge capacity and vertical shaft and produces unsettled whirlpool bag and may cause the works vibration, even the blowout phenomenon has taken place the vertical shaft that has.Because of vertical shaft is easy to produce negative pressure, so shaft section area sudden expansion under annular aerator or the weir must be set, or make the vertical shaft bottom into contraction section and improve vertical shaft pressure, also on the turning linkage section of vertical shaft and the cave of debouchure, be provided with simultaneously and shrink bank and vent cap prevents top, hole generation cavitation erosion.For this reason, the application to drilled shaft flood discharge hole has been subjected to very big restriction.
[summary of the invention]
In view of present drilled shaft flood discharge hole exists the problems referred to above and shortcoming, the utility model provides a kind of submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel that is used to not have gate control.
Flood discharging tunnel described in the utility model, form by the water inlet, vertical shaft, adit and the cave of debouchure that link to each other successively, wherein be provided with several rotating piers symmetrically on the ring dam outside of water inlet, the angle between each rotating pier and the ring dam outside tangent line is less than 15 °.
In a preferred embodiment, the elevation of described rotating pier is lower than the reservoir peak level.
In a preferred embodiment, the angle between each rotating pier and the ring dam outside tangent line is 10 °.Wherein, can most preferably on the ring dam outside, 6-10 rotating pier be set symmetrically.
In another preferred embodiment, also be provided with the baffle pier that catchments in the described adit, and be provided with a top pressing board in the adit in the baffle pier downstream of catchmenting, the cross section of top pressing board is a del.Wherein can further preferably top pressing board be arranged to the cross section is the chamfer triangle.Also can be further preferably the height of top pressing board be made as 1/3 of adit height.Can also be further preferably on the top of top pressing board along the air vent that on the adit X direction diameter to be set be 1m, this air vent has passed whole top pressing board.
In a preferred embodiment, the cross section of the baffle pier that catchments is a triangle.Also can be further preferably the height of the baffle pier that catchments be made as 1/3 of adit height.
In another preferred embodiment, the build equation of described import ring dam is 1/4 ellipse.Can further preferred major axis be 10m also, minor axis be 4m.
The rotating pier that is provided with in the utility model makes ring dam and vertical shaft produce the stable rotating flow motion that has air chamber, utilize eddy flow centrifugal force and mix the negative pressure that a large amount of air are eliminated overflow weir, vertical shaft wall, prevent works generation cavitation corrosion, improve energy dissipation rate simultaneously, make energy dissipation rate greater than 80%, flow velocity is reduced to about 15m/s.
[description of drawings]
Fig. 1 is the structural representation of the utility model preferred implementation;
Fig. 2 is the A-A view of water inlet among Fig. 1;
Fig. 3 is the C-C sectional view of Fig. 1;
Fig. 4 is the D-D sectional view of Fig. 1;
Among the figure, 1-water inlet, 2-ring dam, 3-rotating pier, 4-vertical shaft, 5-adit, 6-catchment baffle pier, 7-cushion pool, 8-top pressing board, 9-air vent, the 10-cave of debouchure.
[specific embodiment]
Flood discharging tunnel described in the utility model is made up of the water inlet 1, vertical shaft 4, adit 5 and the cave of debouchure 10 that link to each other successively.
Wherein be provided with 6-10 rotating pier 3 symmetrically on ring dam 2 outsides of water inlet 1, the angle between each rotating pier 3 and ring dam 2 outside tangent lines is preferably 10 ° less than 15 °.The elevation of rotating pier 3 is a little less than the reservoir peak level.
Such design makes ring dam 2 and vertical shaft 4 produce the stable rotating flow motion that has air chamber, utilize eddy flow centrifugal force and mix the negative pressure that a large amount of air are eliminated overflow weir, vertical shaft 4 walls, improve energy dissipation rate simultaneously, prevent works generation cavitation corrosion, reduce flow velocity in the hole.
Be provided with catchment baffle pier 6 and top pressing board 8 successively along water (flow) direction in adit 5, the baffle pier 6 that catchments is arranged on the bottom of adit 5, and top pressing board 8 is arranged on the top of adit 5.Wherein, the cross section of the baffle pier 6 that catchments is triangles, and it highly is 1/3 of adit 5 height.And the cross section of top pressing board 8 is dels, preferably falls isosceles right triangle, its highly be adit 5 highly 1/3.
Such design makes baffle pier 6 downstreams of catchmenting form a cushion pool 7.And the top pressing board 8 in cushion pool 7 downstreams is cushion pool 7 superchargings, makes top pressing board 8 downstreams can form stable free flow fluidised form.
In addition, along the air vent 9 that on adit 5 X directions diameter to be set be 1m, this air vent 9 has passed whole top pressing board 8 on the top of top pressing board 8.
Air vent 9 is drawn onto top pressing board 8 downstreams by the suction function in top pressing board 8 downstreams with air, has eliminated the negative pressure whirlpool in top pressing board 8 downstreams, makes top pressing board 8 downstreams form free flow fluidised form more stably, and the water surface flows into the outlet absorption basin more stably.

Claims (11)

1. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel, form by the water inlet (1), vertical shaft (4), adit (5) and the cave of debouchure (10) that link to each other successively, it is characterized in that being provided with several rotating piers (3) symmetrically on ring dam (2) outside of water inlet (1), the angle between each rotating pier (3) and ring dam (2) outside tangent line is less than 15 °.
2. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 1 is characterized in that the elevation of described rotating pier (3) is lower than the reservoir peak level.
3. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 1 or 2 is characterized in that the angle between the tangent line of each rotating pier (3) and ring dam (2) outside is 10 °.
4. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 3 is characterized in that described rotating pier (3) is 6-10.
5. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 1 or 2, it is characterized in that also being provided with in the described adit (5) baffle pier that catchments (6), it is characterized in that catchmenting is provided with a top pressing board (8) in the adit (5) in baffle pier (6) downstream, and the cross section of top pressing board (8) is a del.
6. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 5, the cross section that it is characterized in that top pressing board (8) is the chamfer triangle.
7. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 5, the height that it is characterized in that top pressing board (8) are 1/3 of adit (5) height.
8. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 6, the top that it is characterized in that top pressing board (8) is along adit (5) the X direction air vent (9) that to be provided with a diameter be 1m, and this air vent (9) has passed whole top pressing board (8).
9. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 5, the cross section of the baffle pier (6) that it is characterized in that catchmenting is a triangle.
10. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 5, the height of the baffle pier (6) that it is characterized in that catchmenting are 1/3 of adit (5) height.
11. submerged rotating pier vertical shaft eddy flow energy dissipating flood discharging tunnel as claimed in claim 1, the build equation that it is characterized in that described ring dam (2) is 1/4 ellipse.
CN201020518550XU 2010-09-02 2010-09-02 Shaft well swirling flow energy dissipating and flood discharging hole for diving swirling flow generation pier Expired - Lifetime CN201952787U (en)

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Application Number Priority Date Filing Date Title
CN201020518550XU CN201952787U (en) 2010-09-02 2010-09-02 Shaft well swirling flow energy dissipating and flood discharging hole for diving swirling flow generation pier

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963322A (en) * 2015-07-17 2015-10-07 南昌大学 Hydraulic junction facility
CN105714746A (en) * 2016-02-26 2016-06-29 四川大学 Pressure slope type ventilation shaft used for mid-gate chamber in high-water-head flood discharging tunnel
CN109487762A (en) * 2018-12-19 2019-03-19 中国电建集团中南勘测设计研究院有限公司 A kind of annular overflow weir with diversion pier
CN111851435A (en) * 2020-08-10 2020-10-30 洛阳水利勘测设计有限责任公司 Diving whirl-raising pier vertical shaft rotational flow energy dissipation flood discharge hole
CN113174911A (en) * 2021-05-07 2021-07-27 中国电建集团西北勘测设计研究院有限公司 Rotational flow hole structure for improving horizontal rotational flow energy dissipation rate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963322A (en) * 2015-07-17 2015-10-07 南昌大学 Hydraulic junction facility
CN104963322B (en) * 2015-07-17 2016-08-17 南昌大学 A kind of key water control project facility
CN105714746A (en) * 2016-02-26 2016-06-29 四川大学 Pressure slope type ventilation shaft used for mid-gate chamber in high-water-head flood discharging tunnel
CN109487762A (en) * 2018-12-19 2019-03-19 中国电建集团中南勘测设计研究院有限公司 A kind of annular overflow weir with diversion pier
CN109487762B (en) * 2018-12-19 2024-01-30 中国电建集团中南勘测设计研究院有限公司 Annular overflow weir with flow guiding pier
CN111851435A (en) * 2020-08-10 2020-10-30 洛阳水利勘测设计有限责任公司 Diving whirl-raising pier vertical shaft rotational flow energy dissipation flood discharge hole
CN111851435B (en) * 2020-08-10 2021-11-30 洛阳水利勘测设计有限责任公司 Diving whirl-raising pier vertical shaft rotational flow energy dissipation flood discharge hole
CN113174911A (en) * 2021-05-07 2021-07-27 中国电建集团西北勘测设计研究院有限公司 Rotational flow hole structure for improving horizontal rotational flow energy dissipation rate

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Granted publication date: 20110831

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