CN106400753B - A kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and method - Google Patents
A kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and method Download PDFInfo
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Abstract
A kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and method, it include: water inlet, well body and water outlet, overflow weir is equipped in the middle part of the well body, well body is divided into weir leading portion and weir back segment, the inlet and outlet are connect with the bottom of weir leading portion and weir back segment respectively, and the weir leading portion is gradual change diffusion type, and setting is multiple immediately ahead of water outlet flows pier, the overflow weir is key weir, the weir back segment setting multiple-layer horizontal orifice plate and vertical orifice plate.The present invention uses the well body of gradual change diffusion type in weir leading portion, multiple stream piers are also set up in water outlet, sharp-crested weir is changed to key weir, multilayer 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, the influence to ambient enviroment is reduced.Using siphonic water-collecting well of the present invention and method under the premise of realizing relative clean draining, the project amount of siphonic water-collecting well can be greatly reduced, construction cost is reduced, save human and material resources in the interference for excluding bubble pollution.
Description
Technical field
It is a kind of hydraulic facility and side the present invention relates to a kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and method
Method is a kind of environmental protection facility and method.
Background technique
Using the strand thermoelectricity or nuclear power station of direct cooling mode, it is generally provided with drain siphon well, to make using siphon
With pump head is reduced, the energy is saved.Effluent weir in siphonic water-collecting well equipped with crest level more than mean tide tlevel, to mitigate off-lying sea tidal level
Change the influence to siphonic water-collecting well Upstream section.These weirs mostly use the free Overflow drainage of the weir crests such as sharp-crested weir, practical weir and broad-crested weir,
It causes drop behind weir to generate strong moisture mixing in the process, is not easy shattered to pieces yellowish foam to generate, it is dirty to form foam
Area is contaminated, the saliferous water mist of splashing can also corrode the metallic structures near discharge outlet, and in order to reduce when many Power Plant Designs
The siphonic water-collecting well size of project amount, design is often less than normal, causes the fluidised form of water flow on weir poor, more exacerbates the generation of foam.This
A little foams once enter discharge outlet surrounding waters with water flow, it will form foam pollution area, form visual pollution, it is attached to influence power station
Close marine environment.Traditional standard siphonic water-collecting well figure is the right angle water inlet for being not provided with flowing pier.This standard figure is for ruler
Very little biggish siphonic water-collecting well be it is suitable, although right angle water inlet, if siphonic water-collecting well size is larger, water flow movement path compared with
Long, water flow can sufficiently adjust streamline, so that it is more smooth to cross sluice body.Existing siphonic water-collecting well engineering reduces to save cost
The problem of earthwork volume, size is often smaller (can reduce investment outlay few then tens million of, how then more than one hundred million), this brings is: before weir
Fluidised form is very poor, and there are the water bodys of paroxysmal to stop up height, and sluice body turbulence intensity excessively is big, brings adverse effect to defoaming behind weir.
Summary of the invention
In order to overcome the problems of the prior art, the invention proposes a kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and
Method.The siphonic water-collecting well and method, on the basis of existing siphonic water-collecting well, by carrying out improvement and increase by one on some bodily forms
A little hydraulic facilities can greatly reduce the bubble in the water of siphonic water-collecting well discharge, reduce the influence to ambient enviroment.
The object of the present invention is achieved like this: a kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well, comprising: water inlet
Mouth, well body and water outlet, the well body middle part are equipped with overflow weir, well body are divided into weir leading portion and weir back segment, the water inlet
Mouthful and water outlet connect respectively with the bottom of weir leading portion and weir back segment, the weir leading portion be gradual change diffusion type, water outlet just before
Side's setting is multiple to flow pier, and the overflow weir is key weir, the weir back segment setting multiple-layer horizontal orifice plate and vertical orifice plate.
Further, multiple stream piers are that the double-deck of interlaced arrangement flows pier.
Further, the horizontal cross sectional geometry for flowing pier is rectangle.
Further, the upstream end of each horizontal orifice plate is connect with overflow weir rear wall, the horizontal orifice plate distance of first layer
The setting of weir crest a distance, other layer of horizontal orifice plate successively extend to shaft bottom arranged in parallel；Each vertical orifice plate is along water flow
Direction is arranged in parallel, and the bottom end of each vertical orifice plate and the downstream of the horizontal orifice plate of each layer keep certain distance setting, makes each layer water
Flat hole plate and the vertical orifice plate of each layer form L shape.
Further, each vertical orifice plate top horizontal is neat, and the height at the top of vertical orifice plate 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 the horizontal orifice plate downstream and vertical holes board bottom end are 10-20cm.
Further, uniformly distributed multiple buttresses for being used to support orifice plate, the height of the buttress and vertical orifice plate on overflow weir
Concordantly.
Further, circular arc is all made of before and after the buttress.
A kind of the step of key weir flow formula classified energy-dissipation debubbling method using above-mentioned siphonic water-collecting well, the method, is as follows:
The step of shunting: when flowing into well body from water inlet culvert pipe for water flow, multiple baffle piers are encountered in exit, by moisture
For multiply stock water flow；
The step of diffusion: it is divided into after multi-strand flow under the action of gradual change diffusion type weir leading portion that dispersion of flow is opened for water flow
Come, guidance uniform fluid flow, the weir crest for smoothly reaching key weir improved the cross-section of river face of sluice stream using key overflow weir
Product, significantly increases discharge coefficient, reduce acting head on weir and stream falls drop out, slows down the falling process and bubble of water flow
It generates；
The step of pore plate energy dissipation: enter that the horizontal orifice plate of first layer and vertical orifice plate go along with sb. to guard him by weir crest for water flow first
Floor energy dissipating area, in first layer energy dissipating area, under the action of lateral aperture and vertical orifice plate, water flow generates the eddy flow around trunnion axis,
The water flow of rotation generates energy dissipating effect, while the air dissolved in water being made to be precipitated to form bubble, while water flow passes through horizontal orifice plate
Enter second layer energy dissipating area with the hole on vertical orifice plate, in second layer energy dissipating, the horizontal orifice plate of the second layer and second layer vertical holes
Plate equally make water flow generate around trunnion axis eddy flow, make bubble within short distance while energy dissipating, can float up to the water surface,
Rupture；Water flow flows to water outlet eventually by all layers of horizontal orifice plate and vertical orifice plate；
Another significant advantage using three layers of pore plate energy dissipation is that the classification realized under the low turbulence intensity of water body is fallen
Energy dissipating is fallen, first order energy dissipating water body falls less, turbulence intensity is low, and moisture mixing is not violent, and first order orifice plate can completely cut off again after
Contact of the water body with atmosphere during two layers of pore plate energy dissipation, the moisture mixing for greatly reducing atmosphere and water body on the whole are strong
Degree and contact area, can effectively reduce the number of bubbles in water body, avoid the formation of foam.
The step of flowing out well body: water outlet culvert pipe discharge is entered by water outlet for the water flow by energy dissipating and defoaming.
The beneficial effect comprise that: the present invention uses the well body of gradual change diffusion type in weir leading portion, in water outlet
Also set up it is multiple flow piers, sharp-crested weir is changed to key weir, multilayer orifice plate is set behind weir, by 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, reduce the influence to ambient enviroment.
Using siphonic water-collecting well of the present invention and method the premise of relative clean draining can be realized in the interference for excluding bubble pollution
Under, greatly reduce the project amount of siphonic water-collecting well, reduces construction cost, save human and material resources.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the planar structure schematic diagram of the embodiment of the present invention one, eight siphonic water-collecting wells；
Fig. 2 is the schematic view of facade structure of the embodiment of the present invention one, eight siphonic water-collecting wells.
Specific embodiment
Embodiment one:
The present embodiment is a kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well, as shown in Figure 1, 2.The present embodiment includes:
Water inlet 1, well body 2 and water outlet 3, the well body middle part are equipped with overflow weir 4, well body are divided into weir leading portion 201 and weir back segment
202, the inlet and outlet are connect with the bottom of weir leading portion and weir back segment respectively, and the weir leading portion is gradual change diffusion
Formula, the setting of water outlet front is multiple to flow piers 5, and the overflow weir is key weir, and multiple-layer horizontal is arranged in the weir back segment
Orifice plate 6 and vertical orifice plate 7.
The design type of pier is spread+flowed before the weir of siphonic water-collecting well described in the present embodiment using gradual change.Concentrate on siphonic water-collecting well
The water body at middle part first passes around to be spread apart under the shunting function for flowing pier, and the bodily form that gradual change is spread before recycling weir further draws
Uniform fluid flow, steady arrival key weir crest are led, the stationarity of fluidised form before weir is improved, water inlet is enabled to enter the water body of siphonic water-collecting well
Enough uniformly diffusions, and sharp-crested weir is changed to key weir, increase area of passage, is easy to defoam.
It is gradual change diffusion type well body before siphonic water-collecting well weir.So-called gradual change diffusion type well body refers to the abutment wall and water (flow) direction of two sides
It has a certain degree, forms tubaeform flaring, allow water flow to spread apart to come from the outlet of concentration, prevent being jammed for water flow.
Due to using gradual change diffusion type well body, the two sides right angle of rectangle well body has been cut, it is possible to reduce a large amount of earth volume reduces engineering
Cost.
Close to the multiple stream piers of water inlet position setting, enable the water body entered from the inlet in siphonic water-collecting well quick
Diffusion is crossed sluice body and is stablized.Stream pier can be of various shapes, such as: rectangle pier, round pier, triangle pier, these describe several
What shape attribute, explanation be these piers horizontal cross-section shape.
Pier or not is flowed, is excessively occurred in groups, can be set to multiple rows of, every row is multiple, and each row flows
Pier is staggered.The quantity that every row flows pier is gradually increased according to water (flow) direction, such as: first row is arranged two, second row setting
Three, third row setting four, with pyramid configuration.2-3 row can be arranged as needed flows pier.
The middle part of siphonic water-collecting well is arranged in overflow weir, by the waist by siphonic water-collecting well segmentation amount part: weir leading portion and weir back segment.Overflow weir
Height and routine siphonic water-collecting well height of weir plate it is similar.
Siphonic water-collecting well described in the present embodiment is not significantly both to use traditional siphonic water-collecting well thin with traditional siphonic water-collecting well one
Wall weir overflow weir is changed to key overflow weir, abbreviation key weir.Key weir is a kind of similar folding for having crenel city wall in horizontal cross-section
It is linear, or similar key is uniformly by high and low.Using the broken line shape on key weir, the cross-section of river face of sluice stream was improved
Product, significantly increases discharge coefficient, reduce acting head on weir and stream falls drop out, slows down the falling process and bubble of water flow
It generates.
Multilayer " L " type choked flow orifice plate is set behind weir, and for being layered energy dissipating, the aqueous vapor behind reduction weir in water body falling process is mixed
It is mixed, further avoid the formation of foam.So-called " L " type choked flow orifice plate refers to that vertical orifice plate, which is arranged, in one end of horizontal orifice plate forms
L shape.The orifice plate equably arranges through-hole in plate face.
The generation core reasons of foam are the strong moisture mixings formed in water body falling process in siphonic water-collecting well.Avoid rainbow
Inhale well in foam generation method first is that abatement weir before nappe flow enter the speed before water, avoid strong moisture mixing mistake
The formation of journey.Multilayer " L " profiled orifice plate is the new defoaming measure formed based on above-mentioned thought.Orifice plate and solid barrier are not
Together, it has certain fluid resistance, while can also pass through hole overcurrent.Crossing after sluice body encounters " L " profiled orifice plate will form
Lesser energy dissipating area abatement portion of energy (the rotary roll energy dissipating of big intensity can largely support by the arm gas, lead to the formation of foam) of intensity, water flow
This process that flow velocity increases when passing through hole, flow velocity reduces after mistake hole can also generate energy dissipating effect.By the way that multilayer " L " is arranged
Classification, substep energy dissipation in profiled orifice plate completion water body falling process, strong moisture mixing caused by avoiding flow rate of water flow excessive.
" L " profiled orifice plate can select 3 in the siphonic water-collecting well of 15m or so with facility layer 2-4 or more, common siphonic water-collecting well width
Layer orifice plate is more moderate.
Horizontal orifice plate in " L " profiled orifice plate can be with incomplete contact between with vertical orifice plate together with, to avoid sandstone deposition.
It needs to guarantee the hole that haves three layers under worst maximum stream flow and minimum off-lying sea tidal level in the height setting of " L " profiled orifice plate
Plate plays a role, orifice plate overhead height not preferably less than elevation of weir crest+mistake sluice body depth of water.
Several buttresses can be added behind siphonic water-collecting well weir to enhance the structural strength of orifice plate, for fixing choked flow orifice plate.Branch
Pier is the wall extended along water (flow) direction, is moved towards vertical with overflow weir.To make smooth in water flow, interference water flow is avoided, before buttress
After can use designed arc-shaped appearance, to reduce resistance to water-flow, while avoid flow turbulence caused by structural mutation.
Embodiment two:
The present embodiment is the improvement of embodiment one, is embodiment one about the refinement for flowing pier.The present embodiment is multiple described
Stream pier be that the double-deck of interlaced arrangement flows pier.
Multiple stream piers described in the present embodiment are arranged in water outlet, and so-called bilayer is two rows of meanings for flowing pier, lean on
One row's negligible amounts of nearly water outlet, subsequent number of rows amount is more, and two rows of stream piers as shown in Figure 1, first row three is
Pier is flowed, second row four flows pier.Two rows of Jun Liudun are staggered, i.e., below the stream pier of stream pier in front two it
Between, to play better current balance function.
Embodiment three:
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment about stream pier arrangement.The present embodiment
The horizontal cross sectional geometry for flowing pier is rectangle.
There are many horizontal cross sectional geometries for flowing pier, such as: round, triangle, square, rectangle etc., the present embodiment is adopted
The Jun Liudun that water intaking plane section is square.
Example IV:
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment about orifice plate.The present embodiment is each described
The upstream end of horizontal orifice plate connect with overflow weir rear wall, the horizontal orifice plate of first layer is arranged apart from weir crest a distance, other layers
Horizontal orifice plate successively extends to shaft bottom arranged in parallel；Each vertical orifice plate is arranged in parallel along water (flow) direction, each vertical orifice plate
Bottom end and the horizontal orifice plate of each layer downstream keep certain distance setting, form the horizontal orifice plate of each layer with the vertical orifice plate of each layer
L shape.
The position of horizontal orifice plate and vertical orifice plate described in the present embodiment is arranged to form L shape, and multilayer orifice plate forms multiple
" L's " stacks, and forms certain space between each " L " layer, so as to space rolling energy dissipating of the water flow between " L ".
The purpose of gap (can design in 10cm-20cm) is arranged between horizontal orifice plate and vertical orifice plate to be prevented in seawater
Silt, algae, shell etc. formed and precipitate 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 refinement of the above-described embodiment about orifice plate.The present embodiment is each described
Vertical orifice plate top horizontal it is neat, height at the top of vertical orifice plate is higher than elevation of weir crest+mistake sluice body depth of water.
Since 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
The vertical orifice plate of layer extends along the one piece of height higher than one piece of water (flow) direction to underwater.And each horizontal orifice plate is also along depth of water direction
It is one piece longer than one piece, with the increase of depth, increase along water (flow) direction.
Embodiment six:
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment about orifice plate.The present embodiment lateral aperture
Plate and vertical orifice plate are respectively three layers.
The siphonic water-collecting well that the present embodiment is 15 meters for width (maximum distance between the side wall of two sides) is relatively suitble to.
Embodiment seven:
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment about orifice plate.Described in the present embodiment
The distance between horizontal orifice plate downstream and vertical holes board bottom end are 10-20cm.
The distance between horizontal orifice plate and vertical orifice plate described in the present embodiment are the openings of L shape vertex, are horizontal
Orifice plate separated with vertical orifice plate between gap.
Embodiment eight:
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment about orifice plate.The present embodiment overflow weir
Upper uniformly distributed multiple buttresses 8 for being used to support orifice plate, the height of the buttress is concordant with vertical orifice plate, as shown in Figure 1, 2.
When overflow weir is 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 water flow
Impact, be easy to produce bending even be broken.Buttress can be set on overflow weir thus.The trend and overflow weir of these buttresses
Vertically, it is poured with armored concrete, firm degree can support orifice plate completely, prevent its bending.
Embodiment nine:
The present embodiment is the improvement of above-described embodiment, is refinement of the above-described embodiment about buttress.Described in the present embodiment
Circular arc is all made of before and after buttress.
To reduce interference of the buttress to water flow, the head and tail portion of buttress can using it is arc-shaped or streamlined etc. its
He interferes water flow less shape.
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, the step of the method
It is rapid as follows:
The step of shunting: when flowing into well body from water inlet culvert pipe for water flow, multiple stream piers are encountered in exit, by water flow
It is divided into multi-strand flow.Be arranged quickly shunt the purpose is to reduce dispersion of flow distances, it is possible to reduce the volume of weir leading portion, reduce water
It flows being jammed in weir leading portion, multi-strand flow is adapted to each notch on key weir, increases water flow area.
The step of diffusion: when flowing into well body from water inlet culvert pipe for water flow, multiple baffle piers are encountered in exit, by moisture
For multiply stock water flow.Water flow is divided into after multi-strand flow that dispersion of flow comes under the action of gradual change diffusion type weir leading portion, guides water
Stream uniformly, smoothly reaches the weir crest on key weir, and the discharge section area of sluice stream was improved using key overflow weir, significant to increase
Big flow coefficient reduces acting head on weir and stream falls drop out, slows down the generation of the falling process and bubble of water flow.
The step of pore plate energy dissipation: enter that the horizontal orifice plate of first layer and vertical orifice plate go along with sb. to guard him by weir crest for water flow first
Floor energy dissipating area, in first layer energy dissipating area, under the action of lateral aperture and vertical orifice plate, water flow generates the eddy flow around trunnion axis,
The water flow of rotation generates energy dissipating effect, while the air dissolved in water being made to be precipitated to form bubble, while water flow passes through horizontal orifice plate
Enter second layer energy dissipating area with the hole on vertical orifice plate, in second layer energy dissipating, the horizontal orifice plate of the second layer and second layer vertical holes
Plate equally make water flow generate around trunnion axis eddy flow, make bubble within short distance while energy dissipating, can float up to the water surface,
Rupture；Water flow flows to water outlet eventually by all layers of horizontal orifice plate and vertical orifice plate.Water flow forms level between orifice plate
The eddy flow of axis, it can generate resistance, also can produce current balance function, so that bubble floats up to the water surface in short distance.
The drag losses principle of orifice plate are as follows: fluid increases flow velocity when via hole, flow direction changes in each hole contract
Become, the change of flow velocity and flow direction occurs again for when fluid outflow hole, and then generates head loss.
For multi-hole orifice, when hole edge is sharp edge (), under the waterhead fall of single orifice plate is available
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 hole edge is webbing (), the waterhead fall of single orifice plate can calculate (Reynolds number with following formula
Re>105)
In formula:。
The energy dissipating intensity in rotary roll energy dissipating area is small relative to the intensity of conventional energy dissipation by hydraulic jump in " L " profiled orifice plate, strong to reduce
Strong moisture mixing energy dissipation process, avoids the generation of foam.Orifice plate also has well stream spy in addition to energy dissipating effect
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 further avoid the formation of off-lying sea foam pollution band.
The principle for making bubble float up to the water surface in short distance using the current balance function of orifice plate is as follows:
When bubble floats to the water surface from siphonic water-collecting well from water, the move distance in bubble level directionS b It can be calculated with following formula:
(1)
Wherein:V b It is bubble with the movement velocity of water flow,tFloat to the time of the water surface from water from siphonic water-collecting well for bubble,H
For the distance between bubble and the water surface,V u For the ascent rate of bubble.
The ascent rate of bubble is believed that constant is 0.4m/s, therefore:
(2)
The smaller move distance for meaning bubble level direction of movement velocity of the distance between bubble and the water surface and water flowS b It is smaller.HIt is needed depending on off-lying sea tidal level to prevent bubble as early as possible floating to the water surface without entering off-lying sea by downstream box culvert
Flow rate of water flow behind reduction weirV b 。
The step of flowing out well body: water outlet culvert pipe discharge is entered by water outlet for the water flow by energy dissipating and defoaming.One
After a stable energy dissipating and defoaming, the air that bubble is generated in water flow greatly reduces, and very can smoothly be discharged, without
Generation forms foam pollution area.
Finally it should be noted that being only used to illustrate the technical scheme of the present invention and not to limit it above, although referring to preferable cloth
The scheme of setting describes the invention in detail, those skilled in the art should understand that, it can be to technology of the invention
Scheme (such as form, form of siphonic water-collecting well of orifice plate, the sequencing etc. of step) is modified or replaced equivalently, without de-
Spirit and scope from technical solution of the present invention.
Claims (8)
1. a kind of key weir flow formula classified energy-dissipation defoams siphonic water-collecting well, comprising: water inlet, well body and water outlet, in the well body
Portion is equipped with overflow weir, well body is divided into weir leading portion and weir back segment, the inlet and outlet are respectively and behind weir leading portion and weir
The bottom connection of section, which is characterized in that the weir leading portion is gradual change diffusion type, and setting is multiple immediately ahead of water inlet flows pier,
The overflow weir is key weir, the weir back segment setting multiple-layer horizontal orifice plate and vertical orifice plate；Multiple Jun Liudun
Double-deck for interlaced arrangement flows pier, and the upstream end of each horizontal orifice plate is connect with overflow weir rear wall, first layer lateral aperture
Plate is arranged apart from weir crest a distance, other layer of horizontal orifice plate successively extends to shaft bottom arranged in parallel；Each vertical orifice plate
It is arranged in parallel along water (flow) direction, the bottom end of each vertical orifice plate and the downstream of the horizontal orifice plate of each layer keep certain distance setting, make
Each horizontal orifice plate of layer and the vertical orifice plate of each layer form L shape, and multilayer orifice plate forms stacking for multiple " L ", and the shape between each " L " layer
At certain space, so as to space rolling energy dissipating of the water flow between " L ".
2. siphonic water-collecting well according to claim 1, which is characterized in that the horizontal cross sectional geometry for flowing pier is rectangle.
3. siphonic water-collecting well according to claim 2, which is characterized in that each vertical orifice plate top horizontal is neat, vertical orifice plate
The height at top is higher than elevation of weir crest+mistake sluice body depth of water.
4. siphonic water-collecting well according to claim 3, which is characterized in that horizontal orifice plate and vertical orifice plate are respectively three layers.
5. siphonic water-collecting well according to claim 4, which is characterized in that the horizontal orifice plate downstream and vertical holes board bottom end
The distance between be 10-20cm.
6. siphonic water-collecting well according to claim 5, which is characterized in that uniformly distributed multiple branch for being used to support orifice plate on overflow weir
Pier, the height of the buttress are concordant with vertical orifice plate.
7. siphonic water-collecting well according to claim 6, which is characterized in that be all made of circular arc before and after the buttress.
8. a kind of key weir flow formula classified energy-dissipation debubbling method using siphonic water-collecting well described in claim 1, which is characterized in that described
The step of method, is as follows:
The step of shunting: when flowing into well body from water inlet culvert pipe for water flow, multiple baffle piers is encountered in exit, are more by moisture
Stock water flow；
The step of diffusion: being divided into after multi-strand flow under the action of gradual change diffusion type weir leading portion that dispersion of flow comes for water flow,
The weir crest for guiding uniform fluid flow, smoothly reaching key weir, the discharge section area of sluice stream was improved using key overflow weir,
Discharge coefficient is significantly increased, acting head on weir is reduced and stream falls drop out, slow down the production of the falling process and bubble of water flow
It is raw；
The step of pore plate energy dissipation: enter the first layer that the horizontal orifice plate of first layer and vertical orifice plate are gone along with sb. to guard him by weir crest for water flow and disappear
Energy area, in first layer energy dissipating area, under the action of horizontal orifice plate and vertical orifice plate, water flow generates the eddy flow around trunnion axis, rotation
The water flow turned generates energy dissipating effect, while the air dissolved in water being made to be precipitated to form bubble, at the same water flow by horizontal orifice plate and
Hole on vertical orifice plate enters second layer energy dissipating area, in second layer energy dissipating, the horizontal orifice plate of the second layer and the vertical orifice plate of the second layer
So that water flow is generated the eddy flow around trunnion axis, make bubble within short distance while energy dissipating, the water surface can be floated up to, broken
It splits；Water flow flows to water outlet eventually by all layers of horizontal orifice plate and vertical orifice plate；
The step of flowing out well body: water outlet culvert pipe discharge is entered by water outlet for the water flow by energy dissipating and defoaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840783.3A CN106400753B (en) | 2016-09-22 | 2016-09-22 | A kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840783.3A CN106400753B (en) | 2016-09-22 | 2016-09-22 | A kind of key weir flow formula classified energy-dissipation defoaming siphonic water-collecting well and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| CN102966080A (en) * | 2012-11-09 | 2013-03-13 | 广东省水利水电科学研究院 | Novel salt spray defoaming facility for thermal power plant and nuclear power plant |
| CN104563267A (en) * | 2015-01-30 | 2015-04-29 | 中国水利水电科学研究院 | Compound key overflow weir type siphon well and method implemented by same |
| CN105862683A (en) * | 2016-04-22 | 2016-08-17 | 广东省水利水电科学研究院 | Multi-layer and multi-order pore plate used for reducing aeration and restraining bubbles and rapid construction method for multi-layer and multi-order pore plate |
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| CN200964584Y (en) * | 2006-10-25 | 2007-10-24 | 广东省电力设计研究院 | Defoaming antifogging pressure type dissipator overflow weir |
| CN104234174B (en) * | 2014-08-22 | 2016-05-18 | 中国水利水电科学研究院 | A kind of combined type froth breaking siphonic water-collecting well and method |
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| CN102966080A (en) * | 2012-11-09 | 2013-03-13 | 广东省水利水电科学研究院 | Novel salt spray defoaming facility for thermal power plant and nuclear power plant |
| CN104563267A (en) * | 2015-01-30 | 2015-04-29 | 中国水利水电科学研究院 | Compound key overflow weir type siphon well and method implemented by same |
| CN105862683A (en) * | 2016-04-22 | 2016-08-17 | 广东省水利水电科学研究院 | Multi-layer and multi-order pore plate used for reducing aeration and restraining bubbles and rapid construction method for multi-layer and multi-order pore plate |
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