CN108221846A - A kind of pressure free current is to pressure flow fluidised form conversion facility - Google Patents
A kind of pressure free current is to pressure flow fluidised form conversion facility Download PDFInfo
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- CN108221846A CN108221846A CN201810208633.XA CN201810208633A CN108221846A CN 108221846 A CN108221846 A CN 108221846A CN 201810208633 A CN201810208633 A CN 201810208633A CN 108221846 A CN108221846 A CN 108221846A
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- E—FIXED CONSTRUCTIONS
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- E—FIXED CONSTRUCTIONS
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Abstract
The present invention discloses a kind of pressure free current to pressure flow fluidised form conversion facility, upstream linkage section, diffuser, slope section, pond figure and downstream connection section including being sequentially connected setting；Diffuser includes preceding diffuser and rear diffuser, has overflow ducts on preceding diffuser side wall；Afterwards diversion pier is provided in diffuser, there is middle dividing pier respectively in slope section and pond figure, diversion pier, the arrangement connection of middle dividing pier linear state make to enter water in rear diffuser and are flowed into slope section from three water stream channels and have entered pressure pipe culvert after entering downstream connection section after the figure of pond；The rear slopes section of slope section and the pond body leading portion setting wave absorption beam of pond figure；Equal discharge orifice is arranged at the lower part of the Dun Bi of the middle dividing pier in the body leading portion of pond；Wave absorption breastwork is arranged at intersegmental top behind for pond body leading portion and pond.The automatic equalization of flow between each hole of smooth transition and downstream under the different operating modes such as the present invention realizes normal operation in water delivery engineering, engineering is overhauled, wrong hole operation between two kinds of fluidised forms of pressure free current and pressure flow.
Description
Technical field
Present invention relates particularly to a kind of pressure free currents to pressure flow fluidised form conversion facility.
Background technology
With industrialization, the quickening of urbanization process, water resource has become North China, the Northwest's economic development, city are built
If important conditionality factor.To solve the problems, such as urban water supply, long distance water transfer project is increasing, the diversion works master of early stage
Will with using natural river course or excavate the special channel of water delivery free flow water delivery based on, as Diversion Project from Luanhe to Tianjin, WTYQ project,
Tianjin, which is met an urgent need, draws yellow water diversion project etc..With China's expanding economy, problem of environmental pollution is very prominent, therefore to prevent water
Matter pollution, guarantee, urban water supply engineering are gradually developed into based on long range pipe culvert, and such as Dong-Shen water supply project draws
Huang Ji too engineering, closed conduit engineering etc. of diverting Luanhe water to Tianjin, water-carriage mode including no ballast power water delivery, have the water delivery of ballast power, pressurization water delivery,
Gravity and pressurization combination water delivery etc..
The change for situations such as general long distance water transfer is with terrain, frictional head loss, shunting, water-carriage mode can be sent out
Changing, pipe culvert caliber and hole count are also required to accordingly adjust.Water delivery pattern is also managed by water delivery flow, terrain feature, operation
The influence of reason and construction investment, in the location that topography is steep, drop is big, head is abundant, frequently with hole count is few, area of passage is small
Free flow water conveyer mode；Pressure flow water delivery is generally adopted in the location that topography is flat, drop is small, head is limited, common hole count is more, mistake
The patterns such as the big box culvert of flow area or pipeline.Therefore, it needs to set pressure free current and pressure flow between pressure free current and pressure flow
Conversion, transition facility, to realize that the smooth-going of two kinds of fluidised forms is connected；While in order to ensure the safety guarantee rate of water delivery engineering, water delivery
Pipe culvert hole count is generally no less than holes, thus needs conversion facility that can realize the equilibrium of flow between different hole count lower opening, stream
The smooth transition of state, it is particularly problematic in engineering maintenance, wrong hole operating condition, it should more be protected.
Invention content
In view of the technical drawbacks of the prior art, it is an object of the present invention to provide a kind of pressure free currents to pressure flow stream
State conversion facility.
The technical solution adopted to achieve the purpose of the present invention is：
A kind of pressure free current is to pressure flow fluidised form conversion facility, including being sequentially connected the upstream linkage section of setting, diffuser, tiltedly
Slope section, pond figure and downstream connection section；
The upstream linkage section is two pore structures, and the upstream transition of non pressure pipe culvert is connected and positioned at upstream including being used for
The maintenance lockage chamber in transition downstream；The maintenance lockage chamber connection diffuser；
The diffuser includes preceding diffuser and rear diffuser, has overflow ducts on the side wall of the preceding diffuser；
Multiple diversion piers are provided in diffuser after described, are respectively arranged in slope section in the slope section and pond figure
Dividing pier in dividing pier, pond figure, dividing pier is sequentially connected and linear state cloth in dividing pier, pond figure in the diversion pier, slope section
Put, multiple diversion piers will be divided into three water stream channels along water (flow) direction straight line in rear diffuser, make enter it is described after
Water in diffuser is flowed into slope section from three water stream channels and enters downstream connection section after flowing through pond figure, and described in passing through
Downstream connection section has entered pressure pipe culvert；
The slope section includes preceding slope section, middle slope section and rear slopes section；The pond figure include pond body leading portion and
Pond section behind；The lower part of the Dun Bi of dividing pier, which is formed with, in pond figure in the pond body leading portion multiple has homogenizing traffic engineering capability
Equal discharge orifice；Top is provided with stationary flow fluidised form and eliminates the work(of flow aeration between section behind for the pond body leading portion and pond
The wave absorption breastwork of energy；
It is respectively arranged in the rear slopes section and pond body leading portion multiple spaced horizontally disposed with elimination face
The wave absorption beam of wave energy, the wave absorption beam are arranged on the top of corresponding middle dividing pier.
The upstream gradual change segment length 11.5m of the upstream linkage section is 4.4m × 4.5m cast-in-place concrete casees of two pore structures
Contain, bottom plate crest level 23.54m；The maintenance lockage chamber long 15m of the upstream linkage section, wide 11.7m, two pore structure of open type, single hole
Clear span 4.4m.
The diffuser overall length 35m, import overall width 9.7m, export overall width 17.2m, and angle of flare is 6.11 degree；Wherein,
Preceding diffusion segment length 15m is single hole rectangular channel, and the outlet clear span of preceding diffuser is 12.92m；Segment length 20m is spread afterwards, passes through setting
Multiple diversion pier formation widths be 5.0m three hole rectangular channels.
The slope segment length 55.93m is three pore structures, and single hole clear span 5.0m, slope slope ratio is 1:7, bottom plate crest level by
23.54m gradual changes are to pond body bottom plate crest level 15.55m.
The long 40.0m of pond figure, wherein segment length 22.0m before the body of pond, segment length 18.0m, three pore structures, single hole are net behind in pond
Wide 5.0m.
The equal discharge orifice is three, the single hole wide 1.5m, high 4.5m of equal discharge orifice.
The pond body leading portion downstream is equipped with down-the-hole type and overhauls lock, has pressure box culvert to overhaul downstream.
The downstream connection segment length 18.0m is three hole concrete box culverts, and box culvert aperture is along water (flow) direction from 5.0m × 4.4m
Gradual change has the pressure pipe to contain drop-over to 4.4m × 4.4m, with downstream.
The present invention realize under the different operating modes such as normal operation in water delivery engineering, engineering maintenance, the operation of wrong hole pressure free current and
The automatic equalization of flow between each hole of smooth transition and downstream between two kinds of fluidised forms of pressure flow greatlies simplify the scheduling fortune of engineering
Row, reduces construction investment.
Description of the drawings
Fig. 1 is planar structure schematic diagram of the pressure free current to pressure flow fluidised form conversion facility；
Fig. 2 is cross-sectional view of the pressure free current to pressure flow fluidised form conversion facility；
Fig. 3 is fluidised form floor map of the pressure free current under big flow to pressure flow fluidised form conversion facility；
Fig. 4 is fluidised form diagrammatic cross-section of the pressure free current under big flow to pressure flow fluidised form conversion facility；
Fig. 5 is fluidised form floor map of the pressure free current under small flow to pressure flow fluidised form conversion facility；
Fig. 6 is fluidised form diagrammatic cross-section of the pressure free current under small flow to pressure flow fluidised form conversion facility；
Fig. 7 is fluidised form floor map of the pressure free current under the small flow in wrong hole to pressure flow fluidised form conversion facility；
Fig. 8 is fluidised form diagrammatic cross-section of the pressure free current under the small flow in wrong hole to pressure flow fluidised form conversion facility；
Fig. 9 is the arrangement schematic diagram of equal discharge orifice；
Figure 10 is the structure diagram of the pier nose of diversion pier.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
Referring to shown in Fig. 1-10, a kind of pressure free current is to pressure flow fluidised form conversion facility, the upstream including being sequentially connected setting
Linkage section 1, diffuser 2, slope section 3, pond figure 4 and downstream connection section 5；
The upstream linkage section 1 is two pore structures, including being used to connect the upstream transition 11 of non pressure pipe culvert and be located at
The maintenance lockage chamber 12 in upstream transition downstream；The maintenance lockage chamber connection diffuser；
Wherein, maintenance lock 13 is equipped in the maintenance lockage chamber, dividing pier 14 is formed in the upstream linkage section 1, by described in
Form holes structure to 1 inner homogeneous of upstream linkage section；
The diffuser includes preceding diffuser 21 and rear diffuser 22, has overflow to lead to respectively on the side wall of the preceding diffuser
Road 23；
The diversion pier 24 that multiple ends form cusp-shaped, the slope section and pond figure are provided with after described in diffuser 22
Inside it is respectively arranged with dividing pier 35 in slope section, dividing pier 44 in the figure of pond, dividing pier, pond figure interval in the diversion pier, slope section
Pier is sequentially connected and linear state arrangement, multiple diversion piers will be divided into three along water (flow) direction straight line in rear diffuser
A water stream channel or duct make to enter water body in the rear diffuser and are flowed into slope section from three water stream channels and flow through pond
Enter downstream connection section after figure, and pressure pipe culvert has been entered through the downstream connection section, there is pressure pipe to contain and the downstream connection
The outlet of section is connected；
The slope section includes preceding slope section 31, middle slope section 32 and rear slopes section 33；The pond figure includes Chi Shenqian
Section 41 and pond section 42 behind；The lower part of the Dun Bi of dividing pier is formed with multiple with homogenizing in pond figure in the pond body leading portion
The equal discharge orifice 46 of traffic engineering capability；Top is provided with stationary flow fluidised form and elimination between section behind for the pond body leading portion and pond
The wave absorption breastwork 45 of the function of flow aeration；
It is respectively arranged in the rear slopes section and pond body leading portion multiple spaced horizontally disposed with elimination face
The wave absorption beam of wave energy, the wave absorption beam 47 of wave absorption beam 34 and pond body leading portion including rear slopes section, the rear slopes section disappear
The wave absorption beam 47 of wave beam 34 and pond body leading portion is arranged on the top of corresponding middle dividing pier.
In the present invention, diffuser is that the plane between upstream and fluidised form conversion facility is connected, and slope section is upstream and fluidised form
Vertical linking between conversion facility, pond figure are the main bodys of fluidised form conversion facility.With the variation of water delivery flow, upland water
By being connected after the extra energy head of the form of submerged hydraulic jump elimination with downstream water surface curve in conversion facility, realize pressure free current and have pressure
The transition of stream.Pond figure is equipped with the import of breastwork formula pressure pipe culvert and overhauls lock, and is equipped with and disappears in slope section and pond figure suitable height
Wave beam, can not only be used for structural support improves structure stress condition, can also jointly be played with breastwork and eliminate surface wave, stabilization of fluidized, prevents
Only take the effect that air water stream enters downstream pressure pipe culvert.For the globality and rigidity of enhancing structure, structure wall thickness, diffuser are reduced
Back segment, slope section and pond figure are equipped with middle dividing pier；To realize uniform fluid flow under different operating modes, stably entering downstream pressure pipe
Contain, diffuser diversion pier takes the set-up mode of certain angle to play guide functions, while dividing pier is equipped with and flows in the figure of pond
The flow equalization that downstream water-supply-pipe is contained when hole is to realize asymmetric water delivery.To prevent having pressure caused by downstream happens suddenly water hammer
Pipe culvert internal water pressure is drastically increased alternately to be occurred with upstream non pressure pipe culvert free pressure flow, and overflow ducts are provided in diffuser.
In the present invention, by setting wave absorption beam and wave absorption breastwork, flow disorder, the water surface caused by eliminating hydraulic jump can be accelerated
The bubble escaped in fluctuation and water body is brought to downstream pressure pipe culvert to obtain the flow-shape stablized in pond and reduce gas,
In the utility model, wave absorber includes two parts, first, the crossbeam for the elimination hydraulic jump surface wave arranged along water (flow) direction, arrangement
With in order to which enhancing structure overall stiffness, the supporting beam reduced set by structure section size are combined and are designed.Since system is big
During flow water delivery, water levels of upstream and downstream difference is smaller, and water surface curve is steadily connected, and water level fluctuation is smaller；And during medium-small flow water delivery, there is pressure
Head is smaller needed for water delivery section, causes conversion facility upstream and downstream Fall head of water surface larger, energy dissipating will be carried out in the form of hydraulic jump, so as to make
There is pressure pipe to contain water level fluctuation in the figure of forebay into downstream violent, and generated with a large amount of bubbles, therefore, the elevation of wave absorption beam should be with
As control condition, bottom elevation should be slightly below corresponding during water level fluctuation maximum duty the level of tail water under medium-small flow operating mode
Pond body water level.The cross dimensions of wave absorption beam needs to consider the factors such as water level fluctuation characteristic, hydraulic jump feature and Structure Calculation
It is determined.In the case of level of tail water luffing is larger, can according to practical wave dissipation effect, by wave absorption beam staggered floor arranged for interval,
To meet the requirement that surface wave is eliminated under the conditions of different water levels.
Second is that for intercept jump after gas in water body, accelerate its dissipation, the vertical wave absorption breastwork of Transverse to the flow direction arrangement,
Its breastwork with pond figure maintenance lock is combined arrangement.To reduce the head loss of pond figure as possible, make conversion facility overcurrent smooth,
Wave absorption breastwork bottom end should have the height of pressure pipe culvert away from bottom of pond distance not less than downstream.
Still incomplete due to eliminating the theory that gas escapes in surface wave and acceleration water, effect is mainly through hydraulic model
It is verified, due to being provided with surface wave eliminations and accelerating bubble loss facility after jumping, the flow in pond body is occurring strongly
Hydraulic jump after hit with crossbeam, energy is cut down；Later flow again through vertical wave absorption breastwork reflect flow back, again with
It collides, rub with crossbeam, so as to further cut down water body kinetic energy, final pool inner water face is maintained stable state,
Pool inner water face does not have phenomena such as apparent surface vortex, violent disturbance；Take barrier of the air water body through vertical wave absorption breastwork, flow
Direction and flow velocity change, and most gases escape water in the form of bubble along wall and the preceding waters of wall in water body
Face, only small portion of gas enter pond section behind in the form of minor diameter bubble along underflow.Adjustment again through pond section behind, the water surface
More steady, the substantially all effusion water surface of bubble, it is ensured that downstream has pressure pipe to contain the good hydraulics before import.
In the utility model, the diversion pier important technological parameters in the diffuser include cutwater degree, start position and pier nose
Type shape.Cutwater degree and diversion pier start position should be led to ensureing under each water delivery flow that uniform fluid flow diffuses into each water delivery in downstream
Subject to road, it is distributed according to diffuser water flow field, is determined according to the principle of flow equalization.During due to medium-small flow water delivery,
Diffuser category torrent fluidised form blocks water to reduce diversion pier pier nose, through the pier type to diversified forms such as triangle, circle, fish tail types
It carries out than choosing verification, finally determine using the point circle fish tail diving pier after improvement.The pier nose shape of diversion pier is as shown in Figure 10.
The position of diversion pier is determined according to numerical simulation, and is passed through model test and verified.D-diversion pier is thick；R-pier nose circular arc half
Diameter；O1, O2-pier nose circular arc center of circle.
Wherein, the slope section uses 1：7 slope connects diffuser, and backfill ground can be located to avoid upstream structure
On base, while also function to the effect of enhancing gas effusion length.
Preferably, the wave absorption beam 47 of the wave absorption beam 34 of the rear slopes section and pond body leading portion is distinguished multiple, spaced
Certain distance is set, and positioned at sustained height position.The equal discharge orifice 46 is located under the wave absorption beam 47 of the pond body leading portion
Side, and positioned at the upstream side of the wave absorption breastwork 45.
Wherein, the bottom of the pond figure, upstream linkage section, diffuser and downstream connection section be plane, the slope
The bottom of section is the monoblock type ramp structure tilted down along water (flow) direction.
Preferably, the upstream gradual change segment length 11.5m of the upstream linkage section is that 4.4m × 4.5m of two pore structures is cast-in-place mixed
Solidifying soil box culvert, bottom plate crest level 23.54m；Maintenance lockage chamber long 15m, the wide 11.7m of the upstream linkage section are open type holes
Structure, single hole clear span 4.4m.
The diffuser overall length 35m, import overall width 9.7m, export overall width 17.2m, and angle of flare is 6.11 degree；Wherein,
Preceding diffusion segment length 15m is single hole rectangular channel, and the outlet clear span of preceding diffuser is 12.92m；Segment length 20m is spread afterwards, passes through setting
Multiple diversion pier formation widths be 5.0m three hole rectangular channels.The diffuser overflow ducts bottom elevation should meet generation water
During hammer, flow smoothly can excrete conversion facility by overflow ducts in time, and the raising of diffuser water level is avoided to cause non pressure pipe
There is free pressure flow Alternate Phenomenon in culvert, while can stablize the internal water pressure for having pressure pipe to contain.And in normal operation, bottom elevation
There should be certain superelevation, extra overflow is avoided to cause water resource waste.The overflow ducts are designed by free weir flow.Choose diffusion
During angle, it should be ensured that disengaging side does not occur under different operating modes and water delivery flow during dispersion of flow (mainly with medium water delivery flow control)
The phenomenon that wall, in order to avoid because shear action generates lateral current, reflux, vortex, causes fluidised form disorder, structure quake, and then influence
Conveyance capacity, pool inner water position and structure safety.
The slope segment length 55.93m is three pore structures, and single hole clear span 5.0m, slope slope ratio is 1:7, bottom plate crest level by
23.54m gradual changes are to pond body bottom plate crest level 15.55m.
The long 40.0m of pond figure, wherein segment length 22.0m before the body of pond, segment length 18.0m, three pore structures, single hole are net behind in pond
Wide 5.0m.
As shown in figure 9, the equal discharge orifice is three rectangular-shaped holes, and setting spaced apart, the single hole of equal discharge orifice 46
Width (b4) 1.5m, height (h1) 4.5m.3m is divided between the wave absorption beam 34 of the rear slopes section and the wave absorption beam 47 of pond body leading portion,
The section of the wave absorption beam is the rectangle of 1.0m × 0.8m.The equal discharge orifice is away from pond figure initial section distance L1 so that flow
Subject to can fully spreading；Away from wave absorption breastwork distance L2 can then ensure pressure pipe culvert inlet flow state is steady, subject to flow equalization.
It, can be when conversion facility upstream and downstream hole count be inconsistent or the hole water delivery of upstream and downstream mistake is outstanding by setting equal discharge orifice
When it is the hole water delivery of single hole mistake, efficiently solve flow in pond body inevitably repulse or subdue the enemy, bias current, cause pool inner water stream it is disorderly, under
Play pipe contains the problem of mass flow discrepancy, can preferably be homogenized flow, eliminate the adverse effect generated during asymmetric water delivery, keep in pond
Water flow stationary transition.
The pond body leading portion downstream is equipped with down-the-hole type and overhauls lock 43, has pressure box culvert to overhaul downstream, positioned at the wave absorption
In breastwork 45.
The downstream connection segment length 18.0m is three hole concrete box culverts, and box culvert aperture is along water (flow) direction from 5.0m × 4.4m
Gradual change has the pressure pipe to contain drop-over to 4.4m × 4.4m, with downstream.Three pore structures are formed by dividing pier 50 in the downstream connection section,
Side is formed with the corresponding gas vent 51 for leading to earth's surface above, and exhaust is mutually passed to the water stream channel of downstream connection intersegmental part.
The major function of downstream connection section is to realize that pond body has steady being connected of pressure pipe culvert with downstream, and ensures have pressure pipe to contain import flow
With good fluidised form, and be conducive to be vented.For this purpose, downstream connection section takes tapered, counter-slope arrangement, and exhaust is set in end
Hole.The import of linkage section beginning should meet certain depth of immersion requirement, and crest level should meet rich requirement more than pressure in the pipe culvert of end.Gradually
Contracting angle is generally 5 °~7 °, and i is compared on counter-slope slopeInsteadGenerally 1:10~1:15.
The overflow ducts 23 are rectangular groove structure, are formed in the top of the side wall of diffuser, a length of 3m of rectangular channel.
The present invention is not only applicable to big flow water delivery, is also applied for small flow water delivery.
1) big flow water delivery
When system is in design discharge water delivery, fluidised form conversion facility is in normal operating condition, water levels of upstream and downstream drop
Only reserved design head value, water surface curve can smooth out linking, fluid stable in pond.Water body is through diffuser under the action of diversion pier
Evenly into downstream passage, then the homogenization through equal discharge orifice, water flow, which balancedly enters downstream, pressure pipe culvert.Model tries
It tests under the conditions of showing such water delivery, flow-shape is stablized in diffuser, and velocity flow profile is uniform, angle of flare angle and diffusion segment length
It is reasonable to spend value, flow does not occur and takes off wall phenomenon；Diversion pier pier type is reasonable, and position is suitable, each water of entrance that flow can be balanced
Circulation road, pier nose shape can effectively avoid the sputtering of flow；The Dam Configuration Design of conversion facility can be good at meeting design requirement.
Empirical tests fluidised form conversion facility designs build and size is reasonable, and disclosure satisfy that functional requirement.Refer to Fig. 3-4.
2) small flow water delivery
When the small flow transfer water project of system, head needed for pressure water conveyer section is smaller, and downstream water surface curve reduces larger, conversion
Upstream and downstream water body forms larger drop in facility, and upstream and downstream water surface curve is connected in the form of hydraulic jump.At this point, when water delivery flow is by big
Become hour, hydraulic jump is gradually moved from diffuser is rear into pond body, due to there being thicker water cushion in pond, can form submerged water
Jump, water body is by rolling in water cushion, friction is automatic eliminates excess energy, according to the variation that water delivery flow is descending, on
Swimming body gross energy also changes therewith, and water cushion thickness occurs by thick to thin variation, and pool inner water pad is thick under different water delivery flows
Degree can meet the requirement for eliminating energy；When water delivery flow changes from small to big, hydraulic jump is gradually moved from pond body to diffuser, water cushion
Thickness is by thin thickening, and pool inner water mat thickness can also meet the requirement for eliminating energy under different water delivery flows.By wave absorption beam and
The effect of vertical wave absorption breastwork, further eliminates surface layer residual amount of energy, so as to fulfill water body steadily after equal discharge orifice homogenizing
Weighing apparatus ground enters downstream.Model test the result shows that, under the conditions of such water delivery, the Dam Configuration Design of conversion facility is also reasonable,
It disclosure satisfy that design requirement.Refer to Fig. 5-6.
When flow water delivery small using wrong hole (operation of one hole of upstream), flow enters pond after being spread in diffuser
It is interior, then steadily enter downstream pipe culvert after equal discharge orifice homogenizing.Model test shows that under such operating status flow is being spread
Uneven diffusion occurs in section, after diversion pier adjusts for the first time, sectional velocity distribution uniformity coefficient makes moderate progress, into oblique
Hydraulic jump occurs in the section of slope and eliminates excess energy automatically, after equal second of flow homogenizing adjustment of discharge orifice, each hole water body is more uniform
Ground, which enters downstream, has pressure pipe to contain each hole.The size of conversion facility and layout reasonable, do not generate bad hydraulic phenomenon, see figure
Shown in 7-8.
The present invention has the following advantages and feature：
(1) under different water delivery flows, can realize automatic steady transition of the pressure free current to pressure flow, make pressure free current section with
Pressure flow section is clearly demarcated, and ensures that respective fluidised form is stablized relatively.
(2) when upstream and downstream use different hole count water deliverys, it can be homogenized flow automatically, make downstream pressure pipe culvert flow equal
Weighing apparatus, Current connectin are steady.
(3) it under various operating conditions, prevents from that free pressure flow alternately bad hydraulic phenomenon occurs without pressure section pipe culvert, under control
Trip has the internal water pressure that pressure pipe is contained, and ensures engineering safety operation.
(4) pressure pipe contains in roughness variation range in downstream, it is ensured that engineering has the ability of safe transport design discharge.
(5) it is automatic to consume part surplus water head during small flow, while can prevent the bubble generated in energy dissipating from entering downstream
Have in pressure pipe culvert, ensure system conveyance power of water and engineering safety.
The present invention verifies that Current connectin is good between two kinds of different fluidised forms, gas in water under different operating modes through hydraulic model test
Body does not enter downstream substantially pressure pipe culvert, and smaller, downstream pipe culvert flow equalization is fluctuated in pressure pipe culvert Inlet water position, meets engineering peace
Entirely, reliable service requirement.
The above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of pressure free current is to pressure flow fluidised form conversion facility, which is characterized in that including be sequentially connected setting upstream linkage section,
Diffuser, slope section, pond figure and downstream connection section；
The upstream linkage section is two pore structures, and the upstream transition of non pressure pipe culvert is connected and positioned at upstream gradual change including being used for
The maintenance lockage chamber in section downstream；The maintenance lockage chamber connection diffuser；
The diffuser includes preceding diffuser and rear diffuser, has overflow ducts on the side wall of the preceding diffuser；
Multiple diversion piers are provided in diffuser after described, slope section interval is respectively arranged in the slope section and pond figure
Dividing pier in pier, pond figure, dividing pier is sequentially connected, and linear state cloth in dividing pier, pond figure in the diversion pier, slope section
Put, multiple diversion piers will be divided into three water stream channels along water (flow) direction straight line in rear diffuser, make enter it is described after
Water in diffuser is flowed into slope section from three water stream channels and enters downstream connection section after flowing through pond figure, and described in passing through
Downstream connection section has entered pressure pipe culvert；
The slope section includes preceding slope section, middle slope section and rear slopes section；The pond figure includes pond body leading portion and pond body
Back segment；The lower part of the Dun Bi of dividing pier is formed with multiple streams with homogenizing traffic engineering capability in pond figure in the pond body leading portion
Hole；Top is provided with and has the function of stationary flow fluidised form and eliminate flow aeration between section behind for the pond body leading portion and pond
Wave absorption breastwork；
It is respectively arranged in the rear slopes section and pond body leading portion multiple spaced horizontally disposed with elimination surface wave work(
The wave absorption beam of energy, the wave absorption beam are arranged on the top of corresponding middle dividing pier.
2. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the upstream linkage section
Upstream gradual change segment length 11.5m, for 4.4m × 4.5m cast-in-place concrete box culverts of two pore structures, bottom plate crest level 23.54m；It is described
The maintenance lockage chamber long 15m of upstream linkage section, wide 11.7m, two pore structure of open type, single hole clear span 4.4m.
3. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the diffuser overall length
35m, import overall width 9.7m, export overall width 17.2m, and angle of flare is 6.11 degree；Wherein, preceding diffusion segment length 15m is single hole square
Shape slot, the outlet clear span of preceding diffuser is 12.92m；Segment length 20m is spread afterwards, is by multiple diversion pier formation widths of setting
The three hole rectangular channels of 5.0m.
4. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the slope segment length
55.93m is three pore structures, and single hole clear span 5.0m, slope slope ratio is 1:7, bottom plate crest level is by 23.54m gradual changes to pond body bottom plate
Crest level 15.55m.
5. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the pond figure is long
Segment length 22.0m before 40.0m, wherein pond body, pond segment length 18.0m behind, three pore structures, single hole clear span 5.0m.
6. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the equal discharge orifice is three
It is a, the single hole wide 1.5m, high 4.5m of equal discharge orifice.
7. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the pond body leading portion downstream
Lock is overhauled equipped with down-the-hole type, has pressure box culvert to overhaul downstream.
8. pressure free current is to pressure flow fluidised form conversion facility according to claim 1, which is characterized in that the downstream connection segment length
18.0m is three hole concrete box culverts, and box culvert aperture is along water (flow) direction from 5.0m × 4.4m gradual changes to 4.4m × 4.4m, with downstream
Have pressure pipe contain drop-over.
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| CN201810208633.XA CN108221846B (en) | 2018-03-14 | 2018-03-14 | Pressureless flow-to-pressured flow state conversion facility |
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| CN201810208633.XA CN108221846B (en) | 2018-03-14 | 2018-03-14 | Pressureless flow-to-pressured flow state conversion facility |
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| CN108221846B CN108221846B (en) | 2023-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468811A (en) * | 2019-09-09 | 2019-11-19 | 沈阳市文林水土工程设计有限公司 | A kind of flat mouth oblique rectangle trough connection and connector and installation method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050111916A1 (en) * | 2001-11-27 | 2005-05-26 | Dusan Ciuha | Spilway with improved dissipation efficiency |
| CN101672024A (en) * | 2009-10-12 | 2010-03-17 | 天津市水利勘测设计院 | Gravity pressure water delivery system with automatic-adjusting weir well |
| CN201778317U (en) * | 2010-09-06 | 2011-03-30 | 广东省电力设计研究院 | Side inflow pump house diversion device |
| CN201873973U (en) * | 2010-11-09 | 2011-06-22 | 中国水电顾问集团华东勘测设计研究院 | Energy dissipater structure in water transporting tunnel |
| CN202039329U (en) * | 2011-03-29 | 2011-11-16 | 中国水电顾问集团华东勘测设计研究院 | Dividing pier structure capable of eliminating the water ring at tail part of sluice pier |
| CN102900054A (en) * | 2012-10-25 | 2013-01-30 | 中国水电顾问集团北京勘测设计研究院 | River bank-like flood spillway |
| CN104775404A (en) * | 2015-03-26 | 2015-07-15 | 中国水利水电科学研究院 | Steady flow friction reduction absorption basin |
| CN105350502A (en) * | 2015-12-10 | 2016-02-24 | 中水东北勘测设计研究有限责任公司 | Method for improving flow regime of high velocity flow of sharp bend section in free-flow tunnel |
| CN208072326U (en) * | 2018-03-14 | 2018-11-09 | 天津市水利勘测设计院 | A kind of pressure free current is to pressure flow fluidised form conversion facility |
-
2018
- 2018-03-14 CN CN201810208633.XA patent/CN108221846B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050111916A1 (en) * | 2001-11-27 | 2005-05-26 | Dusan Ciuha | Spilway with improved dissipation efficiency |
| CN101672024A (en) * | 2009-10-12 | 2010-03-17 | 天津市水利勘测设计院 | Gravity pressure water delivery system with automatic-adjusting weir well |
| CN201778317U (en) * | 2010-09-06 | 2011-03-30 | 广东省电力设计研究院 | Side inflow pump house diversion device |
| CN201873973U (en) * | 2010-11-09 | 2011-06-22 | 中国水电顾问集团华东勘测设计研究院 | Energy dissipater structure in water transporting tunnel |
| CN202039329U (en) * | 2011-03-29 | 2011-11-16 | 中国水电顾问集团华东勘测设计研究院 | Dividing pier structure capable of eliminating the water ring at tail part of sluice pier |
| CN102900054A (en) * | 2012-10-25 | 2013-01-30 | 中国水电顾问集团北京勘测设计研究院 | River bank-like flood spillway |
| CN104775404A (en) * | 2015-03-26 | 2015-07-15 | 中国水利水电科学研究院 | Steady flow friction reduction absorption basin |
| CN105350502A (en) * | 2015-12-10 | 2016-02-24 | 中水东北勘测设计研究有限责任公司 | Method for improving flow regime of high velocity flow of sharp bend section in free-flow tunnel |
| CN208072326U (en) * | 2018-03-14 | 2018-11-09 | 天津市水利勘测设计院 | A kind of pressure free current is to pressure flow fluidised form conversion facility |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468811A (en) * | 2019-09-09 | 2019-11-19 | 沈阳市文林水土工程设计有限公司 | A kind of flat mouth oblique rectangle trough connection and connector and installation method |
| CN110468811B (en) * | 2019-09-09 | 2024-03-08 | 沈阳市文林水土工程设计有限公司 | Flat-mouth oblique rectangular groove joint, connector and installation method |
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| CN108221846B (en) | 2023-10-27 |
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