CN111809580B - Air-entraining cavitation erosion preventing structure behind gate of flood discharge tunnel - Google Patents
Air-entraining cavitation erosion preventing structure behind gate of flood discharge tunnel Download PDFInfo
- Publication number
- CN111809580B CN111809580B CN202010759700.4A CN202010759700A CN111809580B CN 111809580 B CN111809580 B CN 111809580B CN 202010759700 A CN202010759700 A CN 202010759700A CN 111809580 B CN111809580 B CN 111809580B
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- Prior art keywords
- gate
- tunnel
- flood discharge
- flood
- downstream
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
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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
- Y02E10/20—Hydro energy
Abstract
The invention discloses a post-aeration cavitation-erosion-prevention structure of a gate of a flood discharge tunnel, which comprises the flood discharge tunnel, wherein the flood discharge tunnel is provided with the gate, the downstream of the gate is provided with at least one vent groove, the vent groove is communicated with the external atmospheric environment, the flood discharge tunnel between the gate and the first vent groove is a closed section, and a deflector is arranged in the closed section. By adopting the technical scheme of the invention, the downstream flood discharging tunnel at the position of installing the gate on the flood discharging tunnel is provided with the closed section, the deflector is arranged in the closed end, so that the water flow forms high-speed jet flow after flowing through the closed section, the flow speed of the water flow is accelerated, and the telling jet flow is aerated by arranging the vent groove communicated with the atmospheric environment at the downstream non-pressure section of the closed section, so that the cavitation erosion damage of the downstream flood discharging tunnel of the gate is effectively avoided, the safety of the water conservancy facility is ensured, and the service life of the water conservancy facility is prolonged.
Description
Technical Field
The invention relates to the technical field of hydraulic facility engineering, in particular to a rear aeration cavitation erosion prevention structure of a gate of a flood discharge tunnel.
Background
The design of cavitation erosion prevention behind the flood discharge tunnel gate of the hydraulic and hydroelectric engineering is an important content. At present, most of aeration facilities are adopted to prevent cavitation erosion of high-speed water flow, but the aeration facilities often fail to play a good protection role due to the fact that the design is not ideal. With the rapid development of high dam engineering, the scale of a flood discharge building is larger and larger, the flood discharge flow rate of partial engineering exceeds 50m/s, cavitation erosion damage of water flow after a gate happens occasionally, the conventional cavitation erosion prevention structure is difficult to meet the requirements, and particularly cavitation erosion damage is easy to happen to the downstream of a flood discharge tunnel after the gate is installed, so that the damage of the whole flood discharge engineering is caused, and the engineering safety is threatened.
Disclosure of Invention
In order to solve the technical problems, the invention provides a rear aeration cavitation erosion prevention structure of a gate of a flood discharge tunnel.
The invention is realized by the following technical scheme.
The invention provides a post-aeration cavitation-erosion-prevention structure of a gate of a flood discharge tunnel, which comprises the flood discharge tunnel, wherein the flood discharge tunnel is provided with the gate, the downstream of the gate is provided with at least one vent groove, the vent groove is communicated with the external atmospheric environment, the flood discharge tunnel between the gate and the first vent groove is a closed section, and a deflector is arranged in the closed section.
The deflector is arranged at one or more of the left side wall, the right side wall and the bottom plate of the closed section.
The gradient of the bottom plate baffle is 1: 10-1: 30.
The slope of the left side wall or the right side wall deflector is 1: 10-1: 50.
The number of the vent grooves is multiple, the vent grooves are arranged at the downstream of the gate at proper intervals, and the flood discharge tunnel between any two adjacent vent grooves is sequentially provided with a gradually-reduced section with the gradually-reduced tunnel diameter and a flush joint section with the constant tunnel diameter according to the internal water flow downward discharge path.
The gradient of the inner wall of the reducing section is 1: 10-1: 20.
And a fillet of 0-1 m is arranged at the joint of the vent groove and the downstream flood discharge tunnel of the gate.
And along the water flow discharging path inside the spillway tunnel, the downstream spillway tunnel of the first vent groove is a non-pressure section.
The floodgate is characterized in that the upstream flood discharge tunnel of the gate is a pressure section.
The invention has the beneficial effects that: by adopting the technical scheme of the invention, the downstream flood discharging tunnel at the position of installing the gate on the flood discharging tunnel is provided with the closed section, the baffle is arranged in the closed end, so that the water flow forms high-speed jet flow after flowing through the closed section, the flow speed of the water flow is accelerated, and the high-speed jet flow is aerated by arranging the vent groove communicated with the atmospheric environment at the downstream non-pressure section of the closed section, thereby effectively avoiding cavitation damage of the downstream flood discharging tunnel of the gate, ensuring the structural safety and prolonging the service life.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a pressureless section of the present invention;
fig. 3 is a schematic view of the present invention taken along a-a in fig. 1.
In the figure: 1-flood discharge tunnel, 2-gate, 3-aeration tank, 4-closed section, 5-deflector, 6-reducing section, 7-flat joint section, 8-non-pressure section and 9-pressure section.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, 2 and 3, the post-aeration cavitation erosion prevention structure of the gate of the flood discharge tunnel comprises a flood discharge tunnel 1, wherein a gate 2 is installed on the flood discharge tunnel 1, at least one vent channel 3 is arranged at the downstream of the gate 2, the vent channel 3 is communicated with the external atmosphere, the flood discharge tunnel 1 between the gate 2 and the first vent channel 3 is a closed section 4, and a deflector 5 is arranged in the closed section 4.
Further, a deflector 5 is provided at one or more of the left side wall, the right side wall and the floor of the closed section 4. The gradient of the bottom plate deflector 5 is preferably 1:10 to 1: 30. The slope of the left side wall or the right side wall deflector 5 is 1: 10-1: 50.
In addition, the number of the vent grooves 3 is plural, the plurality of vent grooves 3 are arranged at the downstream of the gate 2 according to proper intervals, and the flood discharging tunnel 1 between any two adjacent vent grooves 3 is sequentially provided with a tapered section 6 with the gradually reduced hole diameter and a flat section 7 with the constant hole diameter according to the internal water flow discharging path. The gradient of the inner wall of the tapered section 6 is preferably 1: 10-1: 20. And a fillet of 0-1 m is arranged at the joint of the vent groove 3 and the downstream flood discharge tunnel 1 of the gate 2.
Further, along the water flow discharging path inside the spillway tunnel 1, the spillway tunnel 1 downstream of the first aeration tank 3 is a pressureless section 8. The flood discharge tunnel 1 at the upper part of the gate 2 is provided with a pressure section 9.
By adopting the technical scheme of the invention, the downstream flood discharging tunnel at the position of installing the gate on the flood discharging tunnel is provided with the closed section, the deflector is arranged in the closed end, so that the water flow forms high-speed jet flow after flowing through the closed section, the flow speed of the water flow is accelerated, and the high-speed jet flow is aerated by arranging the vent groove communicated with the atmospheric environment at the downstream non-pressure section of the closed section, so that the cavitation erosion damage to the downstream flood discharging tunnel of the gate is effectively avoided, the structural safety is ensured, and the service life is prolonged.
Claims (6)
1. The utility model provides a behind flood discharge hole gate aerify anti-cavitation erosion structure which characterized in that: the flood discharge tunnel comprises a flood discharge tunnel (1), a gate (2) is installed on the flood discharge tunnel (1), at least one vent groove (3) is arranged at the downstream of the gate (2), the vent groove (3) is communicated with the external atmospheric environment, the flood discharge tunnel (1) between the gate (2) and the first vent groove (3) is a closed section (4), a deflector (5) is arranged in the closed section (4), the deflector (5) is arranged at one or more of a left side wall, a right side wall and a bottom plate of the closed section (4), the gradient of the bottom plate deflector (5) is 1: 10-1: 30, and the gradient of the deflector (5) on the left side wall or the right side wall is 1: 10-1: 50.
2. The structure of claim 1, wherein the structure is characterized in that: the number of the vent grooves (3) is multiple, the vent grooves (3) are arranged at the downstream of the gate (2) at proper intervals, and the flood discharging tunnel (1) between any two adjacent vent grooves (3) is sequentially provided with a reducing section (6) with gradually reduced tunnel diameter and a flat connection section (7) with constant tunnel diameter according to the internal water flow discharging path.
3. The structure of claim 2, wherein the structure is characterized in that: the gradient of the inner wall of the reducing section (6) is 1: 10-1: 20.
4. The structure of claim 1, wherein the structure is characterized in that: and a fillet of 0-1 m is arranged at the joint of the vent groove (3) and the downstream flood discharge tunnel (1) of the gate (2).
5. The structure of claim 1, wherein the structure is characterized in that: and along the water flow discharging path inside the flood discharging tunnel (1), the downstream flood discharging tunnel (1) of the first vent groove (3) is a non-pressure section (8).
6. The structure of claim 1, wherein the structure is characterized in that: the upstream flood discharge tunnel (1) of the gate (2) is provided with a pressure section (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010759700.4A CN111809580B (en) | 2020-07-31 | 2020-07-31 | Air-entraining cavitation erosion preventing structure behind gate of flood discharge tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010759700.4A CN111809580B (en) | 2020-07-31 | 2020-07-31 | Air-entraining cavitation erosion preventing structure behind gate of flood discharge tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111809580A CN111809580A (en) | 2020-10-23 |
| CN111809580B true CN111809580B (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010759700.4A Active CN111809580B (en) | 2020-07-31 | 2020-07-31 | Air-entraining cavitation erosion preventing structure behind gate of flood discharge tunnel |
Country Status (1)
| Country | Link |
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| CN (1) | CN111809580B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1036143C (en) * | 2008-10-31 | 2010-05-04 | Oranjewoud Ingb Bv | DEVICE FOR PREVENTING DROWNING DANGER IN LEAVE. |
| KR20110009781U (en) * | 2010-04-08 | 2011-10-14 | 코지텍 주식회사 | siphon spillway |
| CN102277862B (en) * | 2011-05-11 | 2013-07-10 | 中国水利水电科学研究院 | Side-wall aeration ramp for free flow tunnel |
| US9476185B2 (en) * | 2014-04-21 | 2016-10-25 | James Edward Clark | Pond water diversion apparatus for flood control and prevention of castor infestation |
| CN108149651B (en) * | 2017-12-21 | 2020-03-31 | 西安理工大学 | Design method of rotational flow blocking and diffusion composite energy dissipater |
| CN109295939A (en) * | 2018-10-29 | 2019-02-01 | 中国电建集团华东勘测设计研究院有限公司 | A kind of air compensating system and its ventilation amount control method of high-velocity flow tunnel |
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2020
- 2020-07-31 CN CN202010759700.4A patent/CN111809580B/en active Active
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| CN111809580A (en) | 2020-10-23 |
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