CN101638888B - Flood discharging method for anticorrosion and energy dissipation of rotational flow ring dam and device thereof - Google Patents
Flood discharging method for anticorrosion and energy dissipation of rotational flow ring dam and device thereof Download PDFInfo
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- CN101638888B CN101638888B CN2009100895627A CN200910089562A CN101638888B CN 101638888 B CN101638888 B CN 101638888B CN 2009100895627 A CN2009100895627 A CN 2009100895627A CN 200910089562 A CN200910089562 A CN 200910089562A CN 101638888 B CN101638888 B CN 101638888B
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Abstract
The invention relates to a flood discharging method for anticorrosion and energy dissipation of a rotational flow ring dam and a device thereof. The device comprises a vertical well; the bottom of the vertical well is communicated with a horizontal energy dissipation hole; the energy dissipation hole is communicated with a flow guide hole; the inlet of the vertical well is provided with the ring dam; the inner ring of the ring dam is connected with a smooth contracted curved surface formed in the vertical well; the ring dam is externally provided with a plurality of flow guide piers; the central lines of the flow guide piers and the tangent lines of the flow guide piers form inclined angles Theta which is larger than and equal to 0 degree and is less than 45 degree; a connection part between the vertical well and the energy dissipation hole, which is relative to the energy dissipation hole, is provided with a space; the energy dissipation hole is provided with a water collecting pier and a contracting pier; and a plunge pool is arranged between the water collecting pier and the contracting pier. Because the flow guide piers are tangent with the edge of the ring dam or the flow guide piers are connected with the edge of the ring dam by forming a small angle, the water flow is rotary, and spiral flow moves in the vertical well. The invention has simple structure, convenient construction, less investment, no maintenance, good anticorrosion and energy dissipation effect, no pulverization phenomenon at the outlet of the flood discharging hole, and protects ecology environment.
Description
Technical field
The present invention relates to the flood discharging method and the device of a kind of flood discharging method for anticorrosion, energy dissipating, is the method and apparatus that a kind of water conservancy flood control sluices, and is a kind of method and apparatus that is used for corrosion protection of reservoir spillway hole and energy dissipating.
Background technology
Build dam and mainly be for control flood, purpose such as generating, urban water supply and agricultural irrigation, and the flood discharge structure facility is the important pivot ingredient that guarantees dam safety flood season.For a good sluicing structure facility it must satisfy safe and reliable to operation, construction investment is few and do not destroy the downstream ecology environment requirement.China big, medium-sized reservoir has tens thousand of seats, wherein major part is an earth and rockfill dam, the engineering that does not reach flood control standard is quite a lot, when extraodinary flood arrives, often because of the flood carrying capacity deficiency, or do not open because of gate, the flood dam break phenomenon of overflowing takes place, cause extinction to people's lives and properties, the slab bridge and the stone overbank reservoir in Henan break down incident to China's politics as in August, 1975, economy and society bring great negative effect, the big boiling water of Guangxi stone storehouse is come interim at flood, gate is not opened, and flood level soars, just in moment that current will overflow the dam, gate is washed away by flood, has avoided a calamity.The incident that breaks down both at home and abroad is a lot, and particularly middle-size and small-size reservoir is countless.For preventing the generation of the incident of breaking down, except that near dam, building the overfall facility.Sometimes need increase and build an emergency spillway, this overfall facility utilizes the Diversion Tunnel (dam is discarded after finishing) when building dam to increase a vertical shaft usually, and the water inlet of establishing ring dam on vertical shaft forms flood discharging tunnel.The weir crest elevation is a normal pool level, and flood discharging tunnel begins flood discharge when water level is higher than ordinary water level.All traditional annular overflow weir vertical shaft type flood discharging tunnels (U.S. claims Morning-glory spillway), the U.S. builds much in 40～fifties of 20th century, and its major defect is:
(1) in order to adapt to design discharge, establish baffle pier at annular weir crest, and in order to prevent because the whirlpool that causes of excavation landform to the influence of discharge capacity, also needs to be provided with specially anti-Xuan Dun.
(2) the bigger negative pressure of vertical shaft ubiquity under the ring dam, in addition, cavitation erosion takes place in the top negative pressure that vertical shaft is connected with the cave of debouchure more Da Yi, also has flow velocity height (gross head 100～200m in the hole, flow velocity 38～50m/s), cavitation erosion also easily taking place, produce atomizating phenomenon and choose stream bank jet in the outlet employing in hole, destroys ecological environment.
(3) before in order to solve the cavitation corrosion problem of vertical shaft, make whole vertical shaft into necked-down section gradually from top to bottom, increasing pressure (U.S.), or the ring-shaped ventilation bank is set, aerator and air channel (former Soviet Union) is set at the import top and the base plate of the cave of debouchure on vertical shaft top.
(4) though many places are provided with air entraining facilities, with the base plate of cave of debouchure linkage section on the possibility that cavitation erosion takes place is also arranged (as China two beaches 1
#Flood discharging tunnel).
(5) air duct system complex increases constructional difficulties, and is uneconomical.
In Diversion Tunnel, also energy-dissipating installation to be set, traditional energy-dissipating installation is to excavate the power well that disappears in the position, bottom, hole of vertical shaft, reverse contraction bank (or claiming pressing plate) is set on the Diversion Tunnel top at the position that vertical shaft is connected with Diversion Tunnel, establish the ventilation well simultaneously, purpose is to increase effect of energy dissipation and keep the downstream to form stable free flow fluidised form.To the increase of energy dissipation rate very little (less than 2%), water level fluctuation is also bigger in the hole by this facility of many evidences.
Summary of the invention
For solving prior art problems, the present invention proposes the flood discharging method and the device of a kind of flood discharging method for anticorrosion, energy dissipating, perhaps is called the release floodwatering facility of flood discharging method for anticorrosion, energy dissipating.The purpose of described method and facility is the novel flood releasing structure that a kind of reliable high efficiency corrosion protection, energy dissipating are provided for Hydropower Plant Reservoir.The method of the invention is to utilize ring dam that the mechanism of whirlpool easily takes place, utilize several water conservancy diversion piers to make ring dam water inlet and vertical shaft form stable spiral flow fluidised form dexterously, increase wall pressure and mix a large amount of air, produce annular hydraulic jump in the vertical shaft bottom, with water cushion combined energy dissipation in the hole, reach the purpose of corrosion protection and raising energy dissipation rate.
The object of the present invention is achieved like this: the flood discharge device of a kind of flood discharging method for anticorrosion, energy dissipating, described device comprises: a vertical shaft, described silo bottom passes through connection mutually with the energy dissipating hole of level, described energy dissipating hole connects with Diversion Tunnel and is connected, the import department of described vertical shaft is provided with ring dam, and the interior ring and the vertical shaft of described ring dam forms smooth shrinkage type curved surface and be connected; Described ring dam is provided with several water conservancy diversion piers outward, and the center line of described water conservancy diversion pier becomes with the tangent line of ring dam more than or equal to 0 ° of angle less than 45 °; There is a space position that described vertical shaft is relative with the energy dissipating hole with the position that the energy dissipating hole connects; Described energy dissipating hole is provided with catchments pier and shrinks pier, and catchmenting between pier and the contraction pier is cushion pool.
A kind of flood discharging method for anticorrosion of said apparatus, flood discharging method of energy dissipating of using, the step of described method:
Current cover ring dam;
Current enter ring dam with the angled direction of ring dam tangent line under the effect of water conservancy diversion pier;
Under the effect of a plurality of water conservancy diversion piers, current form the eddy flow around vertical axis on the smooth shrinkage type curved surface that the ring dam inner edge is connected with vertical shaft;
The eddy flow middle part has cavity, and the current that have cavity suck a large amount of air and enter vertical shaft;
The eddy flow that has a large amount of air falls along vertical shaft, and the position forms annular hydraulic jump and air water mixed mat layer under vertical shaft, consumes big energy;
At the position that vertical shaft combines with the energy dissipating hole, current form to revolve in the energy dissipating hole import space relative with the energy dissipating hole and roll stream, form complicated aeration with former eddy flow around vertical axis and flow, and carry out energy dissipating;
Current enter the energy dissipating hole, and under the effect of the pier that catchments, the high speed aerated flow is injected cushion pool from the open top of the pier that catchments, and current produce to revolve and roll air water shear action continuation consumption big energy, the energy dissipating once more that stream carries out brute force in cushion pool;
When current flow out to shrink pier, the both sides pier induce the vertical shaft whirlpool once more the horizontal whirlpool boiling water stream that produces of the middle pier on aeration and the base plate shear action that runs foul of each other consume big energy, energy dissipating once more again;
Current are discharged through Diversion Tunnel after the energy dissipating.
The beneficial effect that the present invention produces is: making ring dam produce the stable spiral flow motion that has cavity is basis of the present invention, it is different from existing volute chamber or rises revolves the chamber and need build special rising and revolve works, but utilize several water conservancy diversion piers and ring dam periphery tangent or become a low-angle to be connected, make the current rotation, in vertical shaft, form the spiral flow motion.It is simple in structure, easy construction, and small investment need not be keeped in repair, and corrosion protection and effect of energy dissipation are good, and flood discharge hole outlet does not produce atomizating phenomenon, preserves the ecological environment.
Rotational flow ring dam vertical shaft type flood-relief channel of the present invention is the sluicing facility of controlling flood the most flexibly, and it is applicable to urgent flood discharge very much, prevents that flood from overflowing the dam, and its main feature is:
(1) the ring dam crest level is normal high water level (N.H.W.L.) (weir head is generally less than 5m), and gate is not set, automatic letdown flow when flood arrives weir crest.
(2) utilize several roads water conservancy diversion pier to make ring dam produce rotating flow and enter vertical shaft, form the spiral flow motion that has cavity, suck a large amount of air, effect of energy dissipation is good, and can prevent works generation cavitation erosion.
(3) silo bottom need not excavate the power well that disappears, and can reduce expenses.
(4) energy-dissipating installation of being made up of the pier that catchments, cushion pool, contraction pier in the energy dissipating hole is very effective.
Adopt the eddy flow of ring dam and vertical shaft to add that water cushion revolves the result who rolls the stream combined energy dissipation in energy dissipating the hole in, the energy dissipation rate height, always energy dissipation rate can reach 90%, flood discharge hole outlet does not have atomizating phenomenon, can prevent that bed scour and ecological vegetation from destroying, outlet need not be built and be chosen the stream bank, and whole facility is simplified more.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the flood discharge device schematic diagram of the embodiment of the invention one described flood discharging method for anticorrosion, energy dissipating;
Fig. 2 is the embodiment of the invention five described pier schematic diagrames that catchment, and is the C-C sectional drawing of Fig. 1;
Fig. 3 is the embodiment of the invention seven described contraction pier schematic diagrames, is the D-D sectional drawing of Fig. 1;
Fig. 4 is the A-A generalized section of Fig. 1;
Fig. 5 is the schematic diagram of the embodiment of the invention two described five water conservancy diversion piers;
Fig. 6 is the schematic diagram of the embodiment of the invention two described eight water conservancy diversion piers;
Fig. 7 is the current schematic diagram of the flood discharging method of the embodiment of the invention nine described flood discharging method for anticorrosion, energy dissipating;
Fig. 8 is the E-E sectional drawing of Fig. 7.
The specific embodiment
Embodiment one:
Present embodiment is the flood discharge device of a kind of flood discharging method for anticorrosion, energy dissipating, shown in Fig. 1,4.The described device of present embodiment comprises: a vertical shaft 10, silo bottom passes through connection mutually with the energy dissipating hole of level, and the energy dissipating hole connects with Diversion Tunnel 9 and is connected, and the import department of vertical shaft is provided with ring dam 1, the interior ring and the vertical shaft of ring dam forms smooth shrinkage type curved surface and is connected, and forms reducing 2.Ring dam is provided with some water conservancy diversion piers 3 outward, and the center line of water conservancy diversion pier becomes more than or equal to 0 ° with the tangent line of ring dam, less than 45 ° angle.There is a space 5 position that vertical shaft is relative with the energy dissipating hole with the position that the energy dissipating hole connects, sees shown in Fig. 1,4.The energy dissipating hole is provided with catchments pier 6 and shrinks pier 8, and catchmenting between pier and the contraction pier is cushion pool 7.
Present embodiment is made up of rotational flow ring dam, vertical shaft, energy dissipating hole and Diversion Tunnel.Build when Diversion Tunnel wherein is former dam construction, be used for the current of upstream are guided to the downstream, so that dam construction, it is promptly discarded that dam is built completion.The cross section of this Diversion Tunnel is the gateway opening type normally, and promptly the top is semicircle, and the bottom is a rectangle.Usually will transform the cross section of gateway opening type when Diversion Tunnel transform the level rotary flow flood discharging tunnel as, for example transform circular cross-section as, but present embodiment need not any transformation is carried out in the cross section of Diversion Tunnel.Present embodiment is at dam upstream excavating shaft, pass through connection mutually with former Diversion Tunnel, block with concrete plug 4 at one section Diversion Tunnel of connecting portion the upstream, and in the Diversion Tunnel in downstream, simply transform, form energy dissipating hole and water outlet guiding water channel, for simplicity water outlet is guided water channel also to be called Diversion Tunnel.Concrete plug is not adjacent borehole wall setting at vertical shaft, but leaves certain space, rolls stream so that the current that fall produce to revolve in this space, and certain energy dissipating effect is arranged.
The water inlet of present embodiment adopts ring dam, does not revolve the chamber and do not need to adopt special volute chamber or rise.Therefore traditional ring dam always worry to exert an influence swirling water current of flood discharge, often is provided with the anti-pier that revolves and stops current to produce whirlpool when entering vertical shaft.And present embodiment is acted in a diametrically opposite way, and utilizes the water conservancy diversion pier to produce swirling water current, utilizes swirling water current to carry out aeration and the annular hydraulic jump of formation, produces the energy dissipating effect.As long as the diameter of vertical shaft is reasonable in design, can not influence flood carrying capacity.Present embodiment adopts several water conservancy diversion pier and the ring dam periphery is tangent or arrange that at angle water conservancy diversion pier structure and layout are observed hydromechanical principle and rule.The quantity of ring dam water conservancy diversion pier many eddy flows effect more is good more, but the corresponding meeting of discharge coefficient reduces, be that flow can reduce, the quantity of general pier is got 4～8, and the angle of water conservancy diversion pier and ring dam periphery tangent line is also bigger to the discharge coefficient influence, and the big more discharge coefficient of angle is big more, otherwise it is just more little, usually angle is got 0～30 °, and (adopting 10 ° of angles among Fig. 4) as block of wood quantity for a long time, can amplify angle in order to increase discharge coefficient.Annular weir head H and weir radius R
hThe comparison discharge coefficient also influence greatlyyer, work as H/R
hBegan to become in＞0.5 o'clock and flood stream, and work as H/R
hBegan to form freely in＜0.4 o'clock and flow, the former discharge coefficient is less than 0.3, and the latter is greater than 0.35, looks the quantity of water conservancy diversion pier and angle and changes.
Traditional design is used complicated curve form at the contact position of ring dam and vertical shaft, builds more complicated, and present embodiment employing ring dam section is that 1/4 elliptic curve connects with vertical shaft.Because the eddy flow action of centrifugal force raises wall pressure, can prevent cavitation corrosion, produce annular hydraulic jump simultaneously in the vertical shaft bottom and strengthened the energy dissipating dynamics.
Connection is directly passed through mutually with former Diversion Tunnel in the vertical shaft bottom, pours into a mould the pier formation water cushion that catchments near the place of passing through at former Diversion Tunnel mutually with vertical shaft, forms cushion pool and shrink pier in the pier downstream cast of catchmenting, and is generically and collectively referred to as the energy dissipating hole, and downstream, energy dissipating hole directly connects former Diversion Tunnel.The pier that catchments is provided in a side of on the base plate of energy dissipating hole import, naturally form a water cushion, high-velocity flow is from catchmenting pier top jet in the cushion pool that is made of the contraction pier, and the both sides pier that shrinks pier produces the vertical shaft whirlpool, middle pier produces horizontal whirlpool and rolls stream, cause the energy dissipation rate in chamber expansion dissipation hole to reach about 40%, add the energy dissipating effect of vertical shaft eddy flow and annular hydraulic jump, the total energy dissipation rate of flood discharging tunnel can reach 90%.
Lift a realization design example below illustrating: the checkdam of supposing certain key water control project is the enrockment face dam, except that building flood discharge and emptying tunnel, need utilize very flood discharging tunnel of ring dam vertical shaft type of reconstruction of diversion tunnel by MPF (maximum probable flood amount) standard of flood.This project basic document: maximum discharge Q=1300m
3/ s, weir head H=4.8m, gross head Z=120m, Diversion Tunnel chi are wide 13m, high 15m gateway opening shape section.
According to the design principle of flood discharging method for anticorrosion, energy dissipating flood discharge structure, at first by four water conservancy diversion pier design rotational flow ring dams, block of wood and ring dam tangent to periphery angle are got 10 °, work as H/R
h=0.22 o'clock, discharge coefficient m ≈ 0.4 calculated the ring dam radius R
h:
Ring dam diameter D
h=33m,
The vertical shaft diameter:
The ring dam cross dimensions adopts 1/4 elliptic curve (x
2/ a
2+ y
2/ b
2=1), at first determines elliptic curve semi-minor axis: b≤D (D-vertical shaft diameter), major semiaxis: a ≈ 2b.
The characteristics of the catchment pier and the contraction pier in energy dissipating hole are:
1) build of pier is a triangle, and its downstream slope is a vertical plane, makes the negative pressure whirlpool break away from works, adds the nature aeration, guarantees that cavitation corrosion does not take place works;
2) keep the area of passage of each pier to approximate half of vertical shaft sectional area, if area of passage is too little, because Yong Shui will produce unstable vortex filament fluidised form at vertical shaft and cave of debouchure inducer, may cause the works vibration, reduce discharge capacity simultaneously, if shrinkage area is too big, then import hole section can not form pressure dissipator, and energy dissipation rate is greatly reduced.
Embodiment two:
Present embodiment is the improvement of embodiment one, is the improvement of embodiment one about the water conservancy diversion pier.The described water conservancy diversion pier of present embodiment number is 4～8.
Shown in Figure 4 is the situation of 4 water conservancy diversion piers.Fig. 5 is the situation of five water conservancy diversion piers.Fig. 6 is the situation of eight water conservancy diversion piers.
Embodiment three:
Present embodiment is the improvement of embodiment two, is the improvement of embodiment two about the water conservancy diversion pier.The described cross sectional shape of present embodiment is that rectangle 303 connects wedge shape 302, and the water conservancy diversion pier is blunt round from the wedge shape head 301 of ring dam near-end, and the rectangle afterbody 304 of water conservancy diversion pier is rounded, as shown in Figure 4.
The water conservancy diversion pier should be guide wall more precisely, similar one stifled short wall.The cross sectional shape of short wall is a rectangle.For making the water conservancy diversion better effects if, a kind of head that present embodiment adopts is a wedge shape, and the angle of wedge shape is more sharp-pointed, and the tip of wedge shape is with one section arc transition.For making current smooth and easy, all corner angle of water conservancy diversion pier all use arc transition.
Embodiment four:
Present embodiment is the improvement of embodiment three, is the improvement of embodiment three about ring dam.The rounded shaped form of section of the described ring dam outer rim 102 of present embodiment, the sectional curve that ring dam inner edge 101 is connected with vertical shaft is elliptical curve-shaped, sees shown in Figure 1.
The outer rim of ring dam is used simple circular curve, and it is convenient to build.The curved surface that the inner edge of ring dam and the joint face of vertical shaft use the revolution of 1/4th elliptic curves to obtain forms contraction mouth.Elliptic curve (the x of the section of ring dam inner edge
2/ a
2+ y
2/ b
2=1) very simple, easy construction.
Embodiment five:
Present embodiment is the improvement of embodiment four, is the improvement of embodiment four about the pier that catchments, as shown in Figure 2.The described pier that catchments of present embodiment is arranged on the base plate in energy dissipating hole.The pier cross section of catchmenting is triangular in shape, and clip at the top, forms little slope 601.The upstream face and the horizon of pier of catchmenting is 30～45, and back side is vertical with horizon.
Embodiment six:
Present embodiment is the improvement of embodiment five, is the improvement of embodiment five about the pier that catchments.The captured area of the described pier that catchments of present embodiment equals half of vertical shaft sectional area.
Embodiment seven:
Present embodiment is the improvement of embodiment six, is that embodiment six is about shrinking the improvement of pier, as shown in Figure 3.The described contraction pier of present embodiment is arranged on the base plate 803 in energy dissipating hole and the side walls 801.It is triangular in shape to shrink the pier cross section, and clip at the top, forms little slope 802.The upstream face and the horizon that shrink pier are 30～45, and back side is vertical with horizon.
Embodiment eight:
Present embodiment is the improvement of embodiment seven, is the improvement of embodiment seven about the water conservancy diversion pier.The captured area of the described contraction pier of present embodiment equals half of vertical shaft sectional area.
Embodiment nine:
Present embodiment is that the flood discharging method of a kind of flood discharging method for anticorrosion of using the described device of the foregoing description, energy dissipating is shown in Fig. 7,8.The step of the described method of present embodiment is as follows:
Current cover ring dam 1101;
Current enter ring dam 1108 with the angled direction of ring dam tangent line under the effect of water conservancy diversion pier;
Under the effect of a plurality of water conservancy diversion piers, current form the eddy flow 1102 around vertical axis on the smooth shrinkage type curved surface that the ring dam inner edge is connected with vertical shaft;
Eddy flow middle part has cavity, and the current that have a cavity are brought a large amount of air into and entered vertical shaft;
The eddy flow that has a large amount of air falls along vertical shaft, and the position forms annular hydraulic jump and air water mixed mat layer 1103 under vertical shaft, consumes big energy;
At the position that vertical shaft combines with the energy dissipating hole, current form to revolve in the energy dissipating hole import space relative with the energy dissipating hole and roll stream, form complicated aeration with former eddy flow around vertical axis and flow 1104, carry out energy dissipating;
Current enter the energy dissipating hole, and under the effect of the pier that catchments, the high speed aerated flow is injected cushion pool from the open top of the pier that catchments, and current produce to revolve and roll the big energy 1105 of air water shear action continuation consumption that stream carries out brute force, energy dissipating once more in cushion pool;
When current flow out to shrink pier, the both sides pier induce the vertical shaft whirlpool once more the horizontal whirlpool boiling water stream 1106 that produces of the middle pier on aeration 1109 and the base plate shear action that runs foul of each other consume big energy, energy dissipating once more again;
The described flood discharging tunnel running of present embodiment: current play precession through the water conservancy diversion pier and go into ring dam and vertical shaft; formation has the spiral flow of cavity; produce annular hydraulic jump and air water mixed mat layer in the vertical shaft bottom; consume big energy; then the high speed aerated flow is injected in the cushion pool from the pier open top that catchments; generation is revolved and is rolled the big energy of air water shear action continuation consumption that stream carries out brute force; when current flow out the contraction pier; the both sides pier induces vertical shaft whirlpool aeration once more; the horizontal whirlpool boiling water stream that produces with the middle pier shear action that runs foul of each other consumes big energy again; cause residual kinetic energy to remain little; flow velocity reduces sharply that (the flood discharging tunnel flow velocity of gross head 100～200m reduces to 14～18m/s), and the water surface is steady in the Diversion Tunnel, and outlet does not have and washes away in the hole; also do not have atomizating phenomenon, protect downstream ecology in good condition.
It should be noted that at last, below only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to the preferred arrangement scheme, those of ordinary skill in the art is to be understood that, can be to technical scheme of the present invention (such as profile, the size of water conservancy diversion pier and ring dam, the profile, arrangement etc. of catchmenting pier and shrinking pier) make amendment or be equal to replacement, and do not break away from the spirit and scope of technical solution of the present invention.
Claims (9)
1. the flood discharge device of a flood discharging method for anticorrosion, energy dissipating, described device comprises: a vertical shaft, described silo bottom passes through connection mutually with the energy dissipating hole of level, described energy dissipating hole connects with Diversion Tunnel and is connected, it is characterized in that, the import department of described vertical shaft is provided with ring dam, and the interior ring and the vertical shaft of described ring dam forms smooth shrinkage type curved surface and be connected; Described ring dam is provided with several water conservancy diversion piers outward, and the center line of described water conservancy diversion pier becomes more than or equal to 0 ° with the tangent line of ring dam, less than 45 ° angle; There is a space position that described vertical shaft is relative with the energy dissipating hole with the position that the energy dissipating hole connects; Described energy dissipating hole is provided with catchments pier and shrinks pier, and catchmenting between pier and the contraction pier is cushion pool.
2. flood discharge device according to claim 1 is characterized in that, described water conservancy diversion pier number is 4～8.
3. flood discharge device according to claim 2 is characterized in that, the cross sectional shape of described water conservancy diversion pier is that rectangle connects wedge shape, and the water conservancy diversion pier is blunt round from the wedge shape head of ring dam near-end, and the rectangle afterbody of water conservancy diversion pier is rounded.
4. flood discharge device according to claim 3 is characterized in that, the rounded shaped form of the section of described ring dam outer rim, and the sectional curve that the ring dam inner edge is connected with vertical shaft is elliptical curve-shaped.
5. flood discharge device according to claim 4 is characterized in that, the described pier that catchments is arranged on the base plate in energy dissipating hole; The described pier cross section of catchmenting is triangular in shape, and clip at the top, forms little slope; The upstream face and the horizon of the described pier that catchments are 30～45, and back side is vertical with horizon.
6. flood discharge device according to claim 5 is characterized in that the captured area of the described pier that catchments equals half of vertical shaft sectional area.
7. flood discharge device according to claim 6 is characterized in that, described contraction pier is arranged on the base plate and hole, both sides wall in energy dissipating hole; Described contraction pier cross section is triangular in shape, and clip at the top, forms little slope; The upstream face and the horizon of described contraction pier are 30～45, and back side is vertical with horizon.
8. flood discharge device according to claim 7 is characterized in that the captured area of described contraction pier equals half of vertical shaft sectional area.
9. one kind is used the flood discharging method for anticorrosion of the device of one of aforesaid right requirement, the flood discharging method of energy dissipating, it is characterized in that the step of described method:
Current cover ring dam;
Current enter ring dam with the angled direction of ring dam tangent line under the effect of water conservancy diversion pier;
Under the effect of a plurality of water conservancy diversion piers, current form the eddy flow around vertical axis on the smooth shrinkage type curved surface that the ring dam inner edge is connected with vertical shaft;
The eddy flow middle part has cavity, and the eddy flow that has cavity sucks a large amount of air and enters vertical shaft;
The eddy flow that has a large amount of air falls along vertical shaft, and the position forms annular hydraulic jump and air water mixed mat layer under vertical shaft, consumes big energy;
At the position that vertical shaft combines with the energy dissipating hole, current form to revolve in the energy dissipating hole import space relative with the energy dissipating hole and roll stream, form complicated aeration with former eddy flow around vertical axis and flow, and carry out energy dissipating;
Current enter the energy dissipating hole, and under the effect of the pier that catchments, the high speed aerated flow is injected cushion pool from the open top of the pier that catchments, and current produce to revolve and roll air water shear action continuation consumption big energy, the energy dissipating once more that stream carries out brute force in cushion pool;
When current flow out to shrink pier, the both sides pier induce the vertical shaft whirlpool once more the horizontal whirlpool boiling water stream that produces of the middle pier on aeration and the base plate shear action that runs foul of each other consume big energy, energy dissipating once more again;
Current are discharged through Diversion Tunnel after the energy dissipating.
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| CN2009100895627A CN101638888B (en) | 2009-07-24 | 2009-07-24 | Flood discharging method for anticorrosion and energy dissipation of rotational flow ring dam and device thereof |
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| CN2009100895627A CN101638888B (en) | 2009-07-24 | 2009-07-24 | Flood discharging method for anticorrosion and energy dissipation of rotational flow ring dam and device thereof |
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| CN101881020B (en) * | 2010-07-29 | 2012-05-09 | 中国水利水电科学研究院 | Method and device for dissipating energy by automatically adjusting flow through shaft of submerged rotating pier |
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| CN105178268A (en) * | 2015-08-11 | 2015-12-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method and structure for combining diversion tunnel and flood discharge tunnel |
| CN108589669B (en) * | 2018-05-03 | 2020-03-06 | 四川大学 | Device for reducing flood discharge, fog and rainfall of tunnel by using air curtain |
| CN109487762B (en) * | 2018-12-19 | 2024-01-30 | 中国电建集团中南勘测设计研究院有限公司 | Annular overflow weir with flow guiding pier |
| CN111851435B (en) * | 2020-08-10 | 2021-11-30 | 洛阳水利勘测设计有限责任公司 | Diving whirl-raising pier vertical shaft rotational flow energy dissipation flood discharge hole |
| CN112609644B (en) * | 2020-12-22 | 2022-03-11 | 浙江华铖建设有限公司 | Flood discharge method and device for corrosion prevention and energy dissipation of rotational flow annular weir |
| CN113511735B (en) * | 2021-05-11 | 2022-12-20 | 河北诚乾环保工程有限公司 | Sewage treatment aeration tank drainage structure with self-cleaning function |
| CN113882490B (en) * | 2021-09-01 | 2023-08-04 | 武汉市政工程设计研究院有限责任公司 | Vortex inflow vertical shaft system connected into deep drainage tunnel |
| CN115613529A (en) * | 2022-10-28 | 2023-01-17 | 中国电建集团贵阳勘测设计研究院有限公司 | Arrangement structure of high-head ecological flow sluicing tunnel |
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2009
- 2009-07-24 CN CN2009100895627A patent/CN101638888B/en not_active Expired - Fee Related
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