CN208201812U - A kind of diversion tunnel water inlet disappears whirlpool figure - Google Patents
A kind of diversion tunnel water inlet disappears whirlpool figure Download PDFInfo
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- CN208201812U CN208201812U CN201721640662.0U CN201721640662U CN208201812U CN 208201812 U CN208201812 U CN 208201812U CN 201721640662 U CN201721640662 U CN 201721640662U CN 208201812 U CN208201812 U CN 208201812U
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- water inlet
- whirlpool
- diversion tunnel
- lattice structure
- portraitlandscape
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Abstract
The utility model discloses a kind of diversion tunnel water inlet and disappears whirlpool figure, belongs to hydraulic and hydroelectric engineering field.The structural style is specially, at the top of diversion tunnel water inlet and before gate shaft, criss-cross vertical lattice structure is set, lattice structure downstream is connect with gate shaft upstream, and the lattice structure includes longitudinal baffle and lateral partitions, and portraitlandscape partition forms plenum chamber, portraitlandscape partition angle is 90 °, lattice structure is set at the top of inlet of diversion tunnel, is fixedly connected with gate shaft, upstream face is flushed with inlet of diversion tunnel.Diversion structure import provided by the utility model disappear whirlpool, rectifier structure figure and lay mode, so that water flow is in diversion tunnel water inlet, when entering pressure tunnel by free flow, effectively adjustment entrance flow boundary condition and water flow three-dimensional flow structure, the primary condition that vertical-axis eddy is formed before destruction import, the formation for inhibiting whirlpool achievees the purpose that pressurized tunnel water inlet water flow is smooth, balanced transition.
Description
Technical field
The invention belongs to hydraulic and hydroelectric engineering fields, are related to a kind of whirlpool figure that disappears for eliminating diversion tunnel water inlet whirlpool.
Background technique
In hydraulic and hydroelectric engineering, water conservancy project diversion tunnel, flood discharging tunnel etc. have pressure type to draw, occur often before sluice pipe water inlet
Vertical-axis eddy phenomenon.This whirlpool, especially through air-breathing whirlpool, job facilities can be generated with following harm: (1) whirlpool is taken
After the air of band enters diversion tunnel, area of passage is reduced, increases overcurrent resistance, to reduce diversion tunnel conveyance capacity；
(2) air bag is formed, waterflow stabilization in diversion tunnel is influenced, increases barrel fluctuation pressure, easily leads to negative pressure and cavitation phenomenon hair in hole
It is raw, it will cause the destruction to diversion tunnel when serious；(3) water-absorption surface floating material, blocking or destruction diversion tunnel are rolled up.Therefore, it is necessary to
Take measures to avoid or weaken the harm of diversion tunnel water inlet whirlpool.Currently, common counteracting vortex mainly has three classes: (1) adjusting
Whole engineering operation mode guarantees certain depth of the water submerging etc. before water inlet.(2) it rationally designs breastwork, lead wall displacement and form,
Optimize water inlet leading edge landform etc.；(3) special structures, such as anti-whirlpool beam, floatation type raft, the vortex shield of fenestrated, gold are installed
Belong to net etc..It is above-mentioned disappear whirlpool mode to a certain extent with the intensity that can cut down import whirlpool under some actual conditions, but with
The influence of import SEA LEVEL VARIATION or the method for operation, the whirlpool effect that disappears it is undesirable.These whirlpool beam slabs that disappear, it is especially horizontal positioned
The whirlpool grid that the disappears whirlpool effect that disappears it is undesirable, often limited by landform or the method for operation, it is difficult to implement.
Summary of the invention
Gate shaft is usually arranged in position among inlet of diversion tunnel, and open waters is formed between gate shaft and admission section,
Diversion tunnel is open-channel flow under normal conditions, but when meeting great flood also can flowing full flood discharge, at this time by depth of the water submerging is insufficient and import
Terrain influences, and usually forms the vertical-axis eddy of the biggish Plane Rotation of scale when influent stream to this water disturbance.
Disappear whirlpool, rectifier structure figure and cloth technical problem to be solved by the invention is to provide a kind of diversion structure import
If mode, so that water flow in diversion tunnel water inlet, when entering pressure tunnel by free flow, effectively adjusts entrance water flow perimeter strip
Part and water flow three-dimensional flow structure destroy the primary condition of vertical-axis eddy formation before import, inhibit the formation of whirlpool, reaching has pressure
The purpose of smooth, the balanced transition of tunnel water inlet water flow.For the above-mentioned technical problem of solution, the invention discloses a kind of diversion tunnels
Water inlet disappears whirlpool figure, specifically adopts the following technical scheme that
A kind of diversion tunnel water inlet whirlpool figure that disappears is arranged criss-cross at the top of diversion tunnel water inlet and before gate shaft
Vertical lattice structure, lattice structure downstream are connect with gate shaft upstream, the lattice structure include longitudinal baffle and laterally every
Plate, portraitlandscape partition form plenum chamber, and portraitlandscape partition angle is 90 °.
Preferably, the lattice structure is set at the top of import, is fixedly connected with gate shaft, upstream face and diversion tunnel into
Mouth flushes, wherein for portraitlandscape partition room away from that can be adjusted according to specific streamflow regime, plenum chamber is vertical continuously distributed.
Preferably, the portraitlandscape partition uses concrete slab or steel plate, and concrete slab can be used prefabricated or cast-in-place.
Preferably, the portraitlandscape block board thickness according to structure safety and stability it needs to be determined that, preferably 0.1m~1m,
Described, the vertical height of longitudinal baffle is higher than design water level, and lateral partitions horizontal width and the slope terrain that two sides are excavated are smooth
Connection, to increase the contact area with the preceding waters water body of import.Preferably, the plenum chamber that the portraitlandscape partition is formed is met
The water surface is connected to the water body in the preceding waters of import, and single cavity chamber size is the 1/2~1/ of maximum depth of the water submerging on depth of water direction
10, horizontal direction having a size of water inlet overall width 1/2~1/10.
Preferably, the water inlet is more than two and when being closer, and integrally lays the concatenated whirlpool that disappears to water inlet group
Structure, better effect.
If regarding the water body of whirlpool easy to form before import as an entirety, water boundary part is inserted embedded in of the invention
Disappear in the plenum chamber of vortex lattice lattice, effectively increase boundary resistance, weakens the shearing force in boundary layer.Inhibit a wide range of vertical-axis eddy nascent
With development, and as the rising of water level, lattice structure are greatly increased with water body contact surface, effect is more obvious.
The beneficial effect that grid type of the present invention disappears whirlpool figure and three-dimensional laying mode reaches is embodied in:
(1) formation condition and movement characteristic based on whirlpool, the longitudinal lattice structure laid can lead to change and easily form whirlpool
The boundary condition of eddy water body, increases boundary resistance, and the shearing force in smoothization boundary layer can inherently inhibit the nascent and hair of whirlpool
Exhibition, to the abatement significant effect of the vertical-axis eddy of large scale.(2) grid-like pattern is arranged above water inlet leading edge to disappear whirlpool figure,
And it can effectively inhibit whirlpool in different import water levels using longitudinal array laying mode and be formed, and with dampening
The raising of position, lattice structure greatly increases with water body contact surface, inhibition volute at effect it is more significant.Therefore, to water inlet
SEA LEVEL VARIATION is adaptable before mouthful.(3) lattice structure is set to diversion tunnel water inlet top leading edge, connects gate shaft and import
Top plate, structural stability are strong.(4) there are multiple water inlets, as needed, series connection cloth can be carried out to water inlet group
More preferable than an independent water inlet conditional effect if the eddy clearing structure between different water inlets plays synergistic action effect, this is also
The feature that other counteracting vortex do not have.(5) this lattice structure uses vertical characteristics mode, relative to lateral eddy clearing structure
(in the waters plane before being arranged in water inlet), it is small to water inlet turbulent water, and project amount is small, operation expense is low, warp
Ji remarkable benefit.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the side diagram of the embodiment of the present invention；
Fig. 3 is the positive diagram of the embodiment of the present invention；
The perspective view of the position Fig. 4 embodiment of the present invention；
Wherein, diversion tunnel water inlet 1, diversion tunnel water inlet top 2, gate shaft 6, gate shaft upstream 5, longitudinal baffle 3, cross
To partition 4, plenum chamber 7.
Specific embodiment
The present invention is further described below in conjunction with attached drawing.The present embodiment is merely to illustrate the present invention rather than limitation originally
The range of invention.In the following examples, the experimental methods for specific conditions are not specified, usually according to normal condition or according to manufactory
Condition proposed by quotient.Unless otherwise defined, all professional and scientific terms as used herein and one skilled in the art institute
Known meaning is identical.In addition, any method similar to or equal to what is recorded and material all can be applied to present invention side
In method.In fact, those skilled in the art can be easily referring to description above and attached drawing other than content as described herein
It grasps to a variety of improvement of the invention.The improvement is also fallen within the scope of the appended claims.It is described in the text preferable
Implementation method is for illustrative purposes only with material.
Diversion tunnel water inlet eddy eliminating structure figure of the invention is used in some hydropower station diversion tunnel water inlet, such as Fig. 1 institute
Show, the top of diversion tunnel water inlet 12 with before gate shaft 6, the staggered vertical lattice structure of setting portraitlandscape, under lattice structure
Trip is connect with gate shaft upstream 5, and lattice structure includes longitudinal baffle 3 and lateral partitions 4, and portraitlandscape partition forms plenum chamber 7,
Longitudinal diaphragm plate angle is 90 °, and lattice structure is set at the top of import, is fixedly connected with gate shaft, upstream face and diversion tunnel into
Mouth flushes, and portraitlandscape partition uses concrete slab or steel plate.Portraitlandscape block board thickness needs true according to structure safety and stability
It is fixed, the present embodiment block board thickness 0.2m.The vertical height of longitudinal baffle is higher than design water level, the hillside that lateral partitions and two sides are excavated
Landform smoothly connects, to increase the contact area with the preceding waters water body of import.Shown in as shown in Figure 2, Figure 3 and Figure 4, specific setting is vertical
The perpendicular whirlpool portraitlandscape partition that disappears of three cross three, structure crest level is 2435.0m, lowest part horizontal baffle elevation 2412.0m；Partition edge
The long 6m in diversion tunnel influent stream direction, portraitlandscape partition room according to specific streamflow regime away from can adjust；What portraitlandscape partition was formed
Plenum chamber is connected to the water body in the preceding waters of import, and single cavity chamber size floods water on depth of water direction for inlet of diversion tunnel maximum
Deep 1/2~1/10 is 7m in the present embodiment；Horizontal direction having a size of water inlet overall width 1/2~1/10, the present embodiment
In be 10m.As a result, not formed whirlpool, disappear whirlpool significant effect under different operating water levels；Water inlet leading edge reservoir area water flow is steady
It is fixed, other unfavorable fluidised forms are not generated because the eddy clearing structure is arranged, and water flow more can smoothly enter diversion tunnel；Disappear whirlpool
Structural style is simple, and it is convenient to lay.
Working principle, if regarding the water body of whirlpool easy to form before water inlet as an entirety, water boundary part is inserted
In the plenum chamber for disappearing vortex lattice lattice of the invention, boundary resistance is effectively increased, weakens the shearing force in boundary layer.Inhibit a wide range of
Vertical-axis eddy is nascent and develops, and as the rising of water level, lattice structure are greatly increased with water body contact surface, effect is brighter
It is aobvious.Formation condition and movement characteristic based on whirlpool, the longitudinal lattice structure laid, which can lead to change, easily forms whirlpool water body
Boundary condition increases boundary resistance, and the shearing force distribution in smoothization boundary layer can inherently inhibit the nascent and development of whirlpool,
To the abatement significant effect of the vertical-axis eddy of large scale.Grid-like pattern is arranged above water inlet leading edge to disappear whirlpool figure, and uses
Longitudinal array lays mode and can effectively inhibit whirlpool in different import water levels and be formed, and with the liter of water level
Height, lattice structure are greatly increased with water body contact surface, inhibit volute at effect it is more significant.Therefore, to water before water inlet
Position changes adaptable.Lattice structure is set to diversion tunnel water inlet top leading edge, connection gate shaft and import top plate, structure
Stability is strong.This lattice structure uses vertical characteristics mode, and relative to lateral eddy clearing structure, (waters before being arranged in water inlet is flat
On face), it is small to water inlet turbulent water, and project amount is small, operation expense is low, remarkable in economical benefits.
Claims (5)
- The whirlpool figure 1. a kind of diversion tunnel water inlet disappears, which is characterized in that at the top of diversion tunnel water inlet (1) (2) and gate shaft (6) Before, criss-cross vertical lattice structure is set, and lattice structure downstream is connect with gate shaft upstream (5), the lattice structure Including longitudinal baffle (3) and lateral partitions (4), portraitlandscape partition forms plenum chamber (7), and portraitlandscape partition angle is 90 °.
- The whirlpool figure 2. diversion tunnel water inlet according to claim 1 disappears, which is characterized in that the lattice structure is set to At the top of import, it is fixedly connected with gate shaft, upstream face is flushed with inlet of diversion tunnel.
- The whirlpool figure 3. diversion tunnel water inlet according to claim 1 disappears, which is characterized in that the portraitlandscape partition is adopted With concrete slab or steel plate.
- The whirlpool figure 4. diversion tunnel water inlet according to claim 1 disappears, which is characterized in that the portraitlandscape partition is thick Degree according to structure safety and stability it needs to be determined that；The vertical height of the longitudinal baffle is higher than design water level, lateral partitions and two sides The slope terrain of excavation smoothly connects, to increase the contact area with the preceding waters water body of import.
- The whirlpool figure 5. diversion tunnel water inlet according to claim 1 disappears, which is characterized in that the portraitlandscape partition shape At plenum chamber upstream face be connected to the water body in the preceding waters of import, single plenum chamber (7) size is that maximum is flooded on depth of water direction Do not have the 1/2~1/10 of the depth of water, 1/2~1/10 in the horizontal direction having a size of water inlet overall width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721640662.0U CN208201812U (en) | 2017-11-30 | 2017-11-30 | A kind of diversion tunnel water inlet disappears whirlpool figure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721640662.0U CN208201812U (en) | 2017-11-30 | 2017-11-30 | A kind of diversion tunnel water inlet disappears whirlpool figure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208201812U true CN208201812U (en) | 2018-12-07 |
Family
ID=64489932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721640662.0U Expired - Fee Related CN208201812U (en) | 2017-11-30 | 2017-11-30 | A kind of diversion tunnel water inlet disappears whirlpool figure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208201812U (en) |
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2017
- 2017-11-30 CN CN201721640662.0U patent/CN208201812U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181207 Termination date: 20201130 |