CN106400753A - Key weir flow-type classified energy dissipation defoaming siphon well and method - Google Patents
Key weir flow-type classified energy dissipation defoaming siphon well and method Download PDFInfo
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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
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Abstract
The invention discloses a key weir flow-type classified energy dissipation defoaming siphon well and method. The siphon well comprises a water inlet, a well body and a water outlet. An overflow weir is arranged in the middle of the well body to divide the well body into a weir front section and a weir rear section. The water inlet and the water outlet are connected with the bottom of the weir front section and the bottom of the weir rear section correspondingly. The weir front section is in a gradual change diffusion type. A plurality of flow equalizing piers are arranged right in front of the water outlet. The overflow weir is a key weir. The weir rear section is provided with a plurality of layers of horizontal pore plates and vertical pore plates. According to the key weir flow-type classified energy dissipation defoaming siphon well and method, the gradual change diffusion type well body is adopted at the weir front section, the water outlet is further provided with the flow equalizing piers, a plate weir is changed into the key weir, the multiple layers of pore plates are arranged on the rear portion of the weir, bubbles in the water discharged out of the siphon well can be greatly reduced through water conservancy project facilities like improvement of the shape of the well body and increase of the pore plates, and the influence on the ambient environment is reduced. By the adoption of the siphon well and method, the work amount of the siphon well can be greatly reduced under the premises that bubble pollution disturbance is removed and relative clean drainage is realized, building cost is reduced, and manpower and material resources are saved.
Description
Technical field
The present invention relates to a kind of key weir flow formula classified energy-dissipation froth breaking siphonic water-collecting well and method, it is a kind of hydraulic facility and side
Method, is a kind of environmental protection facility and method.
Background technology
Using strand thermoelectricity or the nuclear power station of direct cooling mode, it is generally provided with drain siphon well, to make using siphon
With reducing pump head, save energy.It is provided with the effluent weir that crest level exceedes mean tide tlevel, to mitigate off-lying sea tidal level in siphonic water-collecting well
The impact to siphonic water-collecting well Upstream section for the change.Adopting the free Overflow drainages of weir crest such as sharp-crested weir, practical weir and broad-crested weir these weirs more,
Producing strong moisture mixing during dropping after causing weir, thus produce being difficult shattered to pieces slightly yellow foam, forming foam dirty
Dye area, the saliferous water smoke of splashing also can corrode the metallic structures near discharge outlet, and in order to reduce during many Power Plant Design
Quantities, the siphonic water-collecting well size of design is often less than normal, leads to the fluidised form of current on weir poor, more exacerbates the generation of foam.This
A little foams are once enter discharge outlet surrounding waters with current, it will form foam pollution area, form visual pollution, and impact power station is attached
Near marine environment.Traditional standard siphonic water-collecting well build is the right angle water inlet being not provided with all flowing pier.This standard figure is for chi
Very little larger siphonic water-collecting well is suitable although being right angle water inlet, but if siphonic water-collecting well size is larger, water movement path is relatively
Long, current fully can adjust streamline and more smooth out so that crossing sluice body.Existing siphonic water-collecting well engineering, is cost-effective, reduces
Earthwork volume, size is often less（Can reduce investment outlay tens million of at least, at most more than one hundred million）, the problem that this brings is：Before weir
Fluidised form is very poor, there is paroxysmal water body and stops up height, crosses sluice body turbulence intensity greatly, brings adverse effect to froth breaking behind weir.
Content of the invention
In order to overcome problem of the prior art, the present invention propose a kind of key weir flow formula classified energy-dissipation froth breaking siphonic water-collecting well and
Method.Described siphonic water-collecting well and method, on the basis of existing siphonic water-collecting well, by carrying out the improvement on some bodily forms and increasing by one
A little hydraulic facilities, can greatly reduce the bubble in the water of siphonic water-collecting well discharge, decrease the impact to surrounding.
The object of the present invention is achieved like this：A kind of key weir flow formula classified energy-dissipation froth breaking siphonic water-collecting well, including：Water inlet
Mouthful, well body and outlet, be provided with downflow weir in the middle part of described well body, well body be divided into weir leading portion and weir back segment, described water inlet
Mouthful and outlet is connected with the bottom of weir leading portion and weir back segment respectively, described weir leading portion is gradual change diffusion type, outlet just before
Side's setting is multiple all to flow pier, and described downflow weir is key weir, and described weir back segment arranges multiple-layer horizontal orifice plate and vertical orifice plate.
Further, multiple described all stream piers all flow pier for the bilayer of interlaced arrangement.
Further, the horizontal cross sectional geometry of described all stream pier is rectangle.
Further, each described upstream end of horizontal orifice plate is connected with downflow weir rear wall, ground floor horizontal orifice plate distance
Weir crest one segment distance is arranged, and other layer of horizontal orifice plate is arranged in parallel to shaft bottom extension successively；Each described vertical orifice plate is along current
Direction be arranged in parallel, and the bottom of each vertical orifice plate keeps certain distance setting with the downstream of the horizontal orifice plate of each layer, makes each layer water
Flat hole plate is L-shaped with each layer vertical holes plate shape.
Further, each described vertical holes top of the plate portion is concordant, and the height in vertical holes top of the plate portion is higher than elevation of weir crest+mistake weir
The water body depth of water.
Further, horizontal orifice plate and vertical orifice plate are respectively three layers.
Further, the distance between described horizontal orifice plate downstream and vertical orifice plate bottom are 10-20cm.
Further, uniform multiple buttresses for supporting orifice plate on downflow weir, the height of described buttress and vertical orifice plate
Concordantly.
Further, all using circular arc before and after described buttress.
A kind of key weir flow formula classified energy-dissipation debubbling method using above-mentioned siphonic water-collecting well, the step of methods described is as follows：
The step of shunting：For current when culvert pipe of intaking flows into well body, run into multiple baffle piers in exit, moisture is many
Stock stock current；
The step of diffusion：It is divided into after multi-strand flow dispersion of flow in the presence of the leading portion of gradual change diffusion type weir to come for current,
The weir crest on guiding uniform fluid flow, smoothly arrival key weir, improved the discharge section area of sluice stream using key downflow weir,
Significantly increase discharge coefficient, reduce on weir acting head and go out stream and fall drop, slow down the falling process of current and the product of bubble
Raw；
The step of pore plate energy dissipation：The ground floor gone along with sb. to guard him through the weir crest entrance horizontal orifice plate of ground floor and vertical orifice plate for current disappears
Energy area, in ground floor energy dissipating area, in the presence of lateral aperture and vertical orifice plate, current produce the eddy flow around trunnion axis, rotation
Current produce energy dissipating effect, so that the air of dissolving is separated out simultaneously and form bubble, current pass through horizontal orifice plate and perpendicular simultaneously
Hole on straight hole plate enters second layer energy dissipating area, and in second layer energy dissipating, the horizontal orifice plate of the second layer and the vertical orifice plate of the second layer are same
Sample makes current generation around the eddy flow of trunnion axis, makes bubble while energy dissipating within short distance, can float up to the water surface, break
Split；Current, eventually through all layers of horizontal orifice plate and vertical orifice plate, flow to outlet；
Another one significant advantage using three layers of pore plate energy dissipation is that the classification achieving under the low turbulence intensity of water body is fallen and disappeared
Can, first order energy dissipating water body falls few, and turbulence intensity is low, and moisture mixing is not violent, and first order orifice plate can completely cut off again after two-layer
The contact with air for the water body during pore plate energy dissipation, greatly reduce on the whole air and water body moisture mixing intensity and
Contact area, is effectively reduced the number of bubbles in water body, it is to avoid the formation of foam.
The step flowing out well body：Enter water outlet culvert pipe for the current through energy dissipating and froth breaking by outlet to discharge.
The beneficial effect comprise that：The present invention adopts the well body of gradual change diffusion type in weir leading portion, in water outlet
Also set up multiple all flow piers, sharp-crested weir is changed to key weir, multilamellar orifice plate is set behind weir, by the improvement on the well body bodily form and
Increase the hydraulic facilities such as orifice plate, the bubble in the water of siphonic water-collecting well discharge can be greatly reduced, decrease the impact to surrounding.
The premise of relative clean draining can be realized using siphonic water-collecting well of the present invention and method in the interference of exclusion bubble pollution
Under, greatly reduce the quantities of siphonic water-collecting well, reduce construction cost, use manpower and material resources sparingly.
Brief description
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the planar structure schematic diagram of siphonic water-collecting well described in embodiments of the invention one, eight；
Fig. 2 is the facade structures schematic diagram of siphonic water-collecting well described in embodiments of the invention one, eight.
Specific embodiment
Embodiment one：
The present embodiment is a kind of key weir flow formula classified energy-dissipation froth breaking siphonic water-collecting well, as shown in Figure 1, 2.The present embodiment includes：Water inlet
Mouth 1, well body 2 and outlet 3, are provided with downflow weir 4, well body are divided into weir leading portion 201 and weir back segment 202 in the middle part of described well body,
Described water inlet and outlet are connected with the bottom of weir leading portion and weir back segment respectively, and described weir leading portion is gradual change diffusion type,
The setting of outlet dead ahead is multiple all to flow pier 5, and described downflow weir is key weir, and described weir back segment arranges multiple-layer horizontal orifice plate
6 and vertical orifice plate 7.
Gradual change is adopted to spread+all flow the design type of pier before the weir of the siphonic water-collecting well described in the present embodiment.Concentrate on siphonic water-collecting well
The water body at middle part first passes around to spread under the shunting action all flowing pier and comes, and before recycling weir, the bodily form of gradual change diffusion draws further
Lead uniform fluid flow, steadily reach key weir crest, before raising weir, the stationarity of fluidised form is so that water inlet enters the water body energy of siphonic water-collecting well
Enough uniformly spread, and sharp-crested weir is changed to key weir, increases area of passage it is easy to froth breaking.
It is gradual change diffusion type well body before siphonic water-collecting well weir.So-called gradual change diffusion type well body refers to abutment wall and the water (flow) direction of both sides
Have a certain degree, form flaring enlarging, so that current can be come from the outlet diffusion concentrated, prevent being jammed of current.
Due to using gradual change diffusion type well body, having cut the both sides right angle of rectangle well body, it is possible to reduce substantial amounts of earth volume, reduce engineering
Cost.
Near water inlet position, multiple all stream piers are being set so that the water body entering in siphonic water-collecting well from water inlet can be quick
Diffusion, crosses sluice body stable.All stream piers can be variously-shaped, such as：Rectangle pier, circular pier, triangle pier etc., these describe several
What shape attribute, explanation be these piers horizontal cross-section shape.
All stream piers are not piers, but excessively occur in groups, could be arranged to multiple rows of, often arrange multiple, each row all flows
Pier is staggered.The quantity often arranging all stream piers is gradually increased according to water (flow) direction, such as：First row arranges two, and second row is arranged
Three, the 3rd row arranges four, with pyramid configuration.2-3 row can be arranged as needed and all flow pier.
Downflow weir is arranged on the middle part of siphonic water-collecting well, by the waist by siphonic water-collecting well segmentation amount part：Weir leading portion and weir back segment.Downflow weir
Height similar with conventional siphonic water-collecting well height of weir plate.
Siphonic water-collecting well described in the present embodiment is not significantly both with traditional siphonic water-collecting well one, and the use of traditional siphonic water-collecting well is thin
Wall weir downflow weir is changed to key downflow weir, abbreviation key weir.Key weir is the folding that a kind of horizontal cross-section is similar to crenel city wall
Linear, or the uniform height of similar key is straggly.Using the broken line shape on key weir, improved the cross-section of river face of sluice stream
Long-pending, significantly increase discharge coefficient, reduce on weir acting head and go out stream and fall drop, slow down the falling process of current and bubble
Produce.
Multilamellar " L " type choked flow orifice plate is set behind weir, and for being layered energy dissipating, the aqueous vapor in water body falling process after reducing weir is mixed
Mixed, avoid the formation of foam further.So-called " L " type choked flow orifice plate refers to become in one end of horizontal orifice plate setting vertical holes plate shape
L-shaped.Described orifice plate equably arranges through hole in plate face.
In siphonic water-collecting well, the generation core reasons of foam are the strong moisture mixings being formed in water body falling process.Avoid rainbow
One of the method for generation inhaling foam in well is that nappe flow enters the speed before water before abatement weir, it is to avoid strong moisture mixing mistake
The formation of journey.Multilamellar " L " profiled orifice plate is the new froth breaking measure being formed based on above-mentioned thought.Orifice plate is with solid barrier not
With it has certain fluid resistance, can also pass through hole excessively stream simultaneously.Cross after sluice body runs into " L " profiled orifice plate and can be formed
Portion of energy is cut down in intensity less energy dissipating area（The rotary roll energy dissipating of big intensity can support by the arm gas in a large number, leads to the formation of foam）, current
When hole flow velocity raise, cross hole after flow velocity reduce this process also can produce energy dissipating effect.By arranging multilamellar " L "
Profiled orifice plate completes classification in water body falling process, substep energy dissipation, it is to avoid the excessive strong moisture mixing leading to of flow rate of water flow.
" L " profiled orifice plate can with facility layer 2-4 or more, common siphonic water-collecting well width in 15m about siphonic water-collecting well, select 3
Layer orifice plate is more moderate.
Horizontal orifice plate in " L " profiled orifice plate and vertical orifice plate can be with together with incomplete contact betweens, to avoid sandstone to deposit.
Need to ensure to have three layers under worst maximum stream flow and minimum off-lying sea tidal level in the height setting of " L " profiled orifice plate hole
Plate plays a role, orifice plate overhead height not preferably less than elevation of weir crest+mistake sluice body depth of water.
Structural strength for strengthening orifice plate can set up several buttresses behind siphonic water-collecting well weir, is used for fixing choked flow orifice plate.?
Pier is the body of wall extending along water (flow) direction, and its trend is vertical with downflow weir.For making smooth in water flow, it is to avoid interference current, before buttress
After can adopt designed arc-shaped appearance, to reduce resistance to water-flow, avoid the flow turbulence that structural mutation leads to simultaneously.
Embodiment two：
The present embodiment is the improvement of embodiment one, is embodiment one with regard to all flowing the refinement of pier.The present embodiment is multiple described equal
Stream pier is that the bilayer of interlaced arrangement all flows pier.
Multiple all stream piers described in the present embodiment are arranged in water outlet, and so-called bilayer is the meaning that two rows all flow pier, leans on
One row's negligible amounts of nearly outlet, a row amount below is more, and two rows as shown in Figure 1 all flow pier, and first row three is all
Stream pier, second row four all flows pier.The Jun Liudun of two rows is staggered, that is, below all stream pier two above all flow pier it
Between, to play more preferable current balance function.
Embodiment three：
The present embodiment is the improvement of above-described embodiment, is above-described embodiment with regard to all flowing the refinement of pier arrangement.Described in the present embodiment
The horizontal cross sectional geometry of all stream piers is rectangle.
The horizontal cross sectional geometry of all stream piers has multiple, such as：Circular, triangle, square, rectangle etc., the present embodiment is adopted
Water intaking plane section is foursquare all stream pier.
Example IV：
The present embodiment is the improvement of above-described embodiment, is the refinement with regard to orifice plate for the above-described embodiment.The each described water of the present embodiment
The upstream end of flat hole plate is connected with downflow weir rear wall, and the horizontal orifice plate of ground floor is arranged apart from weir crest one segment distance, other layer of level
Orifice plate extends arranged in parallel successively to shaft bottom；Each described vertical orifice plate be arranged in parallel along water (flow) direction, the bottom of each vertical orifice plate
End keeps certain distance setting with the downstream of the horizontal orifice plate of each layer, makes the horizontal orifice plate of each layer L-shaped with each layer vertical holes plate shape.
The position setting of the horizontal orifice plate described in the present embodiment and vertical orifice plate forms " L " shape, and perforated plate shape becomes multiple
" L " stacks, and forms certain space between each " L " layer, so that space rolling energy dissipating between " L " for the current.
Gap is set between horizontal orifice plate and vertical orifice plate（Can design in 10cm-20cm）Purpose be to prevent in sea water
Silt, algae, shell etc. form precipitation in orifice plate, in turn result in orifice plate blocking, reduce the using effect of orifice plate, and rear
The operation phase of phase increases maintenance cost.
Embodiment five：
The present embodiment is the improvement of above-described embodiment, is the refinement with regard to orifice plate for the above-described embodiment.Each described the erecting of the present embodiment
Straight hole top of the plate portion is concordant, and the height in vertical holes top of the plate portion is higher than elevation of weir crest+mistake sluice body depth of water.
Because the overhead height of the vertical orifice plate of each layer is concordant, and bottom will be close with corresponding horizontal orifice plate, so respectively
Layer vertically orifice plate along one piece high of one piece of ratio of height of water (flow) direction, to extending under water.And each horizontal orifice plate is also along depth of water direction
One piece of ratio one block length, with the increase of depth, increases along water (flow) direction.
Embodiment six：
The present embodiment is the improvement of above-described embodiment, is the refinement with regard to orifice plate for the above-described embodiment.The horizontal orifice plate of the present embodiment and
Vertically orifice plate is respectively three layers.
The present embodiment is for width（Ultimate range between the side wall of two sides）For 15 meters of siphonic water-collecting well, relatively it is suitable for.
Embodiment seven：
The present embodiment is the improvement of above-described embodiment, is the refinement with regard to orifice plate for the above-described embodiment.Level described in the present embodiment
The distance between orifice plate downstream and vertical orifice plate bottom are 10-20cm.
The distance between horizontal orifice plate described in the present embodiment and vertical orifice plate, are the openings at " L " shape drift angle, are levels
Orifice plate separate with vertical orifice plate between gap.
Embodiment eight：
The present embodiment is the improvement of above-described embodiment, is the refinement with regard to orifice plate for the above-described embodiment.On the present embodiment downflow weir all
The multiple buttress 8 for supporting orifice plate of cloth, the height of described buttress is concordant with vertical orifice plate, as shown in Figure 1, 2.
When downflow weir longer that is to say, that when the width of siphonic water-collecting well is larger, the intensity of orifice plate itself is not enough to resist current
Impact, easily produce bending and even rupture.For this, buttress can be arranged on downflow weir.The trend of these buttresses and downflow weir
Vertically, poured with armored concrete and form, its firm degree can support orifice plate completely, prevent its bending.
Embodiment nine：
The present embodiment is the improvement of above-described embodiment, is the refinement with regard to buttress for the above-described embodiment.Buttress described in the present embodiment
In front and back all using circular arc.
For reducing the interference to current for the buttress, the head of buttress and afterbody can adopt circular arc, or streamlined etc. its
He disturbs less shape to current.
Embodiment ten：
The present embodiment is a kind of key weir flow formula classified energy-dissipation debubbling method using above-mentioned siphonic water-collecting well, and the step of methods described is such as
Under：
The step of shunting：For current when culvert pipe of intaking flows into well body, run into multiple all stream piers in exit, current are divided into
Multi-strand flow.The purpose of the quick shunting of setting is to reduce dispersion of flow distance, it is possible to reduce the volume of weir leading portion, reduces current and exists
Being jammed of weir leading portion, multi-strand flow is adapted to each breach on key weir, increases current area.
The step of diffusion：For current when culvert pipe of intaking flows into well body, run into multiple baffle piers in exit, by moisture
For multiply stock current.Current be divided into multi-strand flow after in the presence of the leading portion of gradual change diffusion type weir dispersion of flow come, guide water
Stream is uniform, weir crest that is smoothly reaching key weir, improved the discharge section area of sluice stream using key downflow weir, and significantly increased
Big flow coefficient, reduces on weir acting head and goes out stream and fall drop, slow down the falling process of current and the generation of bubble.
The step of pore plate energy dissipation：First going along with sb. to guard him through the weir crest entrance horizontal orifice plate of ground floor and vertical orifice plate for current
Floor energy dissipating area, in ground floor energy dissipating area, in the presence of lateral aperture and vertical orifice plate, current produce the eddy flow around trunnion axis,
The current of rotation produce energy dissipating effect, so that the air of dissolving in water is separated out simultaneously and form bubble, current pass through horizontal orifice plate simultaneously
Enter second layer energy dissipating area, in second layer energy dissipating, the horizontal orifice plate of the second layer and second layer vertical holes with the hole on vertical orifice plate
Plate equally make current produce around trunnion axis eddy flow, make bubble while energy dissipating within short distance, can float up to the water surface,
Rupture；Current, eventually through all layers of horizontal orifice plate and vertical orifice plate, flow to outlet.Current form level between orifice plate
The eddy flow of axle, you can to produce resistance it is also possible to produce current balance function so that bubble floats up to the water surface in short distance.
The drag losses principle of orifice plate is：Fluid shrinks in each in the hole, so that flow velocity during via is increased, flows to and change
Become, flow velocity and the change of flow direction occur during fluid outflow hole again, and then produces the loss of flood peak.
For multi-hole orifice, when Kong Bianwei sharp edge（）, under the waterhead fall of single orifice plate can use
Formula calculates（Reynolds number Re>105）
In formula：lFor the thickness of orifice plate,,For the area in a hole,For the wetted perimeter in hole,, F1For
The gross area of orifice plate.
When Kong Bianwei webbing（）, the waterhead fall of single orifice plate can calculate with following formula（Reynolds number
Re>105）
In formula：.
In " L " profiled orifice plate, the energy dissipating intensity in rotary roll energy dissipating area is little with respect to the intensity of conventional energy dissipation by hydraulic jump, strong to reduce
Strong moisture mixing energy dissipation process, it is to avoid the generation of foam.Orifice plate, in addition to having energy dissipating effect, also has and all flows spy well
Property, after orifice plate, the flow rate of water flow in siphonic water-collecting well is evenly distributed, further such that bubble can float up within short distance
The water surface, rupture, avoid the formation of off-lying sea foam pollution band further.
Using the current balance function of orifice plate make bubble float up in short distance the water surface principle as follows：
Bubble when siphonic water-collecting well floats to the water surface from water, the move distance in bubble level directionS b Available following formula calculates：
(1)
Wherein：V b For bubble with current movement velocity,tThe time of the water surface is floated to for bubble from siphonic water-collecting well from water,HFor gas
The distance between bubble and the water surface,V u Ascent rate for bubble.
The ascent rate of bubble be believed that constant for 0.4m/s, therefore：
(2)
The distance between bubble and the water surface and the less move distance meaning bubble level direction of movement velocity of currentS b More
Little.HDepending on off-lying sea tidal level, want to prevent bubble from not containing entrance off-lying sea by downstream tank floating to the water surface as early as possible, need to reduce
Flow rate of water flow behind weirV b .
The step flowing out well body：Enter water outlet culvert pipe for the current through energy dissipating and froth breaking by outlet to discharge.One
After individual stable energy dissipating and froth breaking, the air producing bubble in current greatly reduces, and can very smoothly discharge, without
Produce and form foam pollution area.
Finally it should be noted that above only in order to technical scheme to be described and unrestricted, although with reference to preferable cloth
Scheme of putting has been described in detail to the present invention, it will be understood by those within the art that, can be to the technology of the present invention
Scheme（The form of such as orifice plate, the form of siphonic water-collecting well, sequencing of step etc.）Modify or equivalent, and do not take off
Spirit and scope from technical solution of the present invention.
Claims (10)
1. a kind of key weir flow formula classified energy-dissipation froth breaking siphonic water-collecting well, including：Water inlet, well body and outlet, in described well body
Portion is provided with downflow weir, by well body be divided into weir leading portion and weir back segment, described water inlet and outlet respectively with weir leading portion and weir after
The bottom of section connects it is characterised in that described weir leading portion is gradual change diffusion type, and the setting of outlet dead ahead is multiple all to flow pier,
Described downflow weir is key weir, and described weir back segment arranges multiple-layer horizontal orifice plate and vertical orifice plate.
2. siphonic water-collecting well according to claim 1 is it is characterised in that multiple described all stream pier is the double-deck equal of interlaced arrangement
Stream pier.
3. according to claim 2 siphonic water-collecting well it is characterised in that described all stream pier horizontal cross sectional geometry be rectangle.
4. siphonic water-collecting well according to claim 3 is it is characterised in that after each described upstream end of horizontal orifice plate and downflow weir
Wall connects, and the horizontal orifice plate of ground floor is arranged apart from weir crest one segment distance, and other layer of horizontal orifice plate extends parallel to shaft bottom successively
Row；Each described vertical orifice plate be arranged in parallel along water (flow) direction, the downstream of the bottom of each vertical orifice plate and the horizontal orifice plate of each layer
Keep certain distance setting, make the horizontal orifice plate of each layer L-shaped with each layer vertical holes plate shape.
5. siphonic water-collecting well according to claim 4 is it is characterised in that each described vertical holes top of the plate portion is concordant, vertical orifice plate
The height at top is higher than elevation of weir crest+mistake sluice body depth of water.
6. siphonic water-collecting well according to claim 5 is it is characterised in that horizontal orifice plate and vertical orifice plate are respectively three layers.
7. siphonic water-collecting well according to claim 6 is it is characterised in that described horizontal orifice plate downstream and vertical orifice plate bottom
The distance between be 10-20cm.
8. siphonic water-collecting well according to claim 7 it is characterised in that on downflow weir uniformly multiple for support orifice plate
Pier, the height of described buttress is concordant with vertical orifice plate.
9. siphonic water-collecting well according to claim 8 is it is characterised in that all using circular arc before and after described buttress.
10. a kind of usage right requires the key weir flow formula classified energy-dissipation debubbling method of siphonic water-collecting well described in 1 it is characterised in that institute
The step stating method is as follows：
The step of shunting：For current when culvert pipe of intaking flows into well body, run into multiple baffle piers in exit, moisture is many
Stock stock current；
The step of diffusion：It is divided into after multi-strand flow dispersion of flow in the presence of the leading portion of gradual change diffusion type weir to come for current,
The weir crest on guiding uniform fluid flow, smoothly arrival key weir, improved the discharge section area of sluice stream using key downflow weir,
Significantly increase discharge coefficient, reduce on weir acting head and go out stream and fall drop, slow down the falling process of current and the product of bubble
Raw；
The step of pore plate energy dissipation：The ground floor gone along with sb. to guard him through the weir crest entrance horizontal orifice plate of ground floor and vertical orifice plate for current disappears
Energy area, in ground floor energy dissipating area, in the presence of lateral aperture and vertical orifice plate, current produce the eddy flow around trunnion axis, rotation
Current produce energy dissipating effect, so that the air of dissolving is separated out simultaneously and form bubble, current pass through horizontal orifice plate and perpendicular simultaneously
Hole on straight hole plate enters second layer energy dissipating area, and in second layer energy dissipating, the horizontal orifice plate of the second layer and the vertical orifice plate of the second layer are same
Sample makes current generation around the eddy flow of trunnion axis, makes bubble while energy dissipating within short distance, can float up to the water surface, break
Split；Current, eventually through all layers of horizontal orifice plate and vertical orifice plate, flow to outlet；
The step flowing out well body：Enter water outlet culvert pipe for the current through energy dissipating and froth breaking by outlet to discharge.
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| CN114370036A (en) * | 2022-02-16 | 2022-04-19 | 重庆交通大学 | Novel fishway structure of key weir combination orifice formula |
| CN116084338A (en) * | 2023-02-24 | 2023-05-09 | 重庆交通大学 | Method for treating main flow of large-fall large-included-angle canal tributary |
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| CN116084338B (en) * | 2023-02-24 | 2024-05-24 | 重庆交通大学 | Method for treating main flow of large-fall large-included-angle canal tributary |
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| CN106400753B (en) | 2018-12-14 |
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