CN104818699B - A kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means and method thereof - Google Patents
A kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means and method thereof Download PDFInfo
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- CN104818699B CN104818699B CN201510153321.XA CN201510153321A CN104818699B CN 104818699 B CN104818699 B CN 104818699B CN 201510153321 A CN201510153321 A CN 201510153321A CN 104818699 B CN104818699 B CN 104818699B
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Abstract
The present invention relates to a kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means and method thereof, including the water pump installed in closed intake pool and closed intake pool and the loudspeaker mouth of pipe, the water guide cone arranged on the intake pool base plate of the underface of the loudspeaker mouth of pipe, it is characterized in that, described water guide cone is 1/4 elliptic cone taper platform, 1/4 elliptic cone taper platform is apart from the equal diameters of closed intake pool rear wall distance with the loudspeaker mouth of pipe, height is water pump loudspeaker nozzle diameter the 2/5 of 1/4 elliptic cone taper platform, footpath at the bottom of the cone of 1/4 elliptic cone taper platform and water pump loudspeaker mouth of pipe equal diameters, vertex of a cone footpath is water pump loudspeaker nozzle diameter the 7/25 of 1/4 elliptic cone taper platform, the elliptic cone cross section of 1/4 elliptic cone taper platform is 1/4 elliptic cone.Present configuration rationally simple, manufacture easy, easy to use, by rectification with adjust pond low speed degree, make the active cross-section flow velocity of entrance water pump and pipeline tend to uniform.
Description
Technical field
The present invention relates to a kind of vortex reducing means, particularly relate to a kind of closed intake pool 1/4 elliptic cone taper
Platform vortex reducing means and method thereof, belong to closed intake pool design field.
Background technology
The achievement in research of open type intake pool is numerous both at home and abroad, grinds box culvert-type water inlet flow channel on this basis
Study carefully the main flow becoming research in recent years, but the research for closed intake pool is less.
Owing to water feeding of water pump pond arranges suction hose, make intake pool and suction hose internal flow state extremely complex, enter
Often occurring water surface whirlpool and two kinds of whirlpool, attached end vortex in pond, they are affect pumping plant stable operation important
Factor.The water surface whirlpool that wherein open type intake pool often occurs easily causes air at the water surface to suck, and induction cavitation is empty
Erosion, and closed intake pool included wall whirlpool forms low-pressure area in bottom, is easily generated cavitation vortex rope, cause pump and
The vibration of pipeline periodically, has a strong impact on pump performance and life-span.
Intake pool is pumping plant topmost water inlet flow passage components, directly influences the efficiency of water pump and whole pumping plant
Operational effect.For improving closed intake pool fluidised form, the vortex method that disappears used at present has: dividing plate, setting-out
Plate and diversion pier etc..But the current vortex method that disappears is difficult to eliminate Di Fudi whirlpool, intake pool pond thoroughly.
Summary of the invention
The present invention is aiming at above-mentioned the deficiencies in the prior art, it is provided that one can be effectively improved closed intake pool
Bad fluidised form, improve efficiency of pumping station, eliminate at the bottom of pond and near zone bigger flow velocity shear gradient, reach to disappear
Except Di Fudi whirlpool, pond and the closed intake pool 1/4 elliptic cone taper platform that do not induces new recirculating zone or vortex
Vortex reducing means and method thereof.
The technical scheme is that, a kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means,
Including the water pump installed in closed intake pool and closed intake pool and the loudspeaker mouth of pipe, the loudspeaker mouth of pipe just under
The water guide cone arranged on the intake pool base plate of side, is characterized in that, described water guide cone is 1/4 elliptic cone taper
Platform, 1/4 elliptic cone taper platform apart from the equal diameters of closed intake pool rear wall distance with the loudspeaker mouth of pipe, 1/4
The height of elliptic cone taper platform is at the bottom of the cone of 2/5,1/4 elliptic cone taper platform of water pump loudspeaker nozzle diameter
Footpath and water pump loudspeaker mouth of pipe equal diameters, the vertex of a cone footpath of 1/4 elliptic cone taper platform is water pump loudspeaker nozzle diameter
The elliptic cone cross section of 7/25,1/4 elliptic cone taper platform be 1/4 elliptic cone, 1/4 elliptic cone
Equation is:In formula: x is oval short axle, y is oval major axis.
Described 1/4 elliptic cone taper platform is made up of Steel material or concrete.
Described 1/4 elliptic cone taper platform is shell structure, and the surrounding at the bottom of 1/4 elliptic cone taper platform passes through spiral shell
Bolt is arranged on closed intake pool base plate.
Described 1/4 elliptic cone taper platform is xoncrete structure, 1/4 elliptic cone taper platform and closed water inlet
Pond bottom slab concreting is integral.
A kind of closed intake pool 1/4 elliptic cone taper platform disappears vortex method, it is characterized in that, closed enter
Arranging 1/4 elliptic cone taper platform on pond baseboard, 1/4 elliptic cone taper platform is being arranged on closed water inlet
Immediately below the water pump loudspeaker mouth of pipe in pond, the centrage of 1/4 elliptic cone taper platform overlaps with water pump axis line,
1/4 elliptic cone taper platform is apart from the equal diameters of closed intake pool rear wall distance with the loudspeaker mouth of pipe, and 1/4 is ellipse
The height of taper seat taper platform be 2/5,1/4 elliptic cone taper platform of water pump loudspeaker nozzle diameter cone at the bottom of footpath
With water pump loudspeaker mouth of pipe equal diameters, the vertex of a cone a diameter of water pump loudspeaker nozzle diameter of 1/4 elliptic cone taper platform
The elliptic cone cross section of 7/25,1/4 elliptic cone taper platform be 1/4 elliptic cone, 1/4 elliptic cone
Equation is:In formula: x is oval short axle, y is oval major axis.
Present configuration rationally simple, manufacture easy, easy to use, the know-why of the present invention is:
Current, along 1/4 elliptic cone of 1/4 elliptic cone taper platform rule, smoothly enter from the surrounding of cone
The loudspeaker mouth of pipe in closed intake pool, is effectively improved flow-shape and reduces hydraulic loss, it is ensured that current stream
Speed uniform increments.
Backwater district below the water pump loudspeaker mouth of pipe is filled up by 1/4 elliptic cone taper platform, it is to avoid closed enter
Backwater district and the mutual frictional impact of current water at the rear wall of pond and under the loudspeaker mouth of pipe and the fluidised form that causes is disorderly and
Bigger shear rate gradient (i.e. vorticity)；1/4 elliptic cone taper platform eliminates original bad flow-shape,
Make current reconfigure, to reduce strength of vortex and to eliminate vortex rope, improve efficiency of pumping station.
Current it are possible not only to be obviously improved below the loudspeaker mouth of pipe not based on the 1/4 elliptic cone taper platform vortex method that disappears
Good fluidised form, and reduction vortex strength of vortex can be played, reach to eliminate the effect in whirlpool, the attached end.1/4 elliptic cone
Face cone shape platform has guide functions, and current side under closed intake pool smoothly enters loudspeaker along elliptic cone
The mouth of pipe, 1/4 elliptic cone taper platform can effectively fill the backwater district below horn mouth simultaneously, hence it is evident that improves envelope
Velocity flow profile below the enclosed intake pool loudspeaker mouth of pipe, destroys vortex.
By rectification and adjustment pond low speed degree, the active cross-section flow velocity of entrance water pump and pipeline is made to tend to uniform.
The present invention is applied to pumping plant construction and upgrading, improves efficiency of pumping station 6% to 10%, can play huge economic effect
Benefit.
Based on 1/4 elliptic cone taper platform vortex reducing means, by guiding current to enter in an orderly manner along rule elliptic cone
Enter oviduct, and fill up the backwater district under raw water pump water inlet, serve stabilization of fluidized, eliminate whirlpool, the attached end,
Reduce the effect of cavitation.1/4 elliptic cone taper platform simple in construction, easy construction, available mould realizes in batch
Produce.Along with country's large pumping station technological transformation and the constructing and implementing of South-to-North Water Transfer Project, have altogether
The Inlet flow pattern of up to a hundred pumping plants needs to improve, therefore the application of technical scheme and enforcement, for
Level changing amplitude, compared with big and that the unsettled height of oviduct is too high pumping plant, installs the effect of 1/4 elliptic cone taper platform
The most obvious, this will produce bigger economic worth and social benefit.May be used for designing institute to be designed with
Or in engineered middle enforcement.
Accompanying drawing explanation
Fig. 1 is the 3D solid perspective view of closed intake pool.
Fig. 2 is the 1/4 elliptic cone taper platform Prevention and dissipation cone 3D solid figure of the present invention.
In figure: 1 closed intake pool, 2 1/4 elliptic cone taper platforms, 3 water guide caps, 4 water pumps, 5 loudspeakers
The mouth of pipe, 6 1/4 elliptic cone taper platform sections.
Detailed description of the invention
Illustrate that the invention will be further described with accompanying drawing below in conjunction with the accompanying drawings.
A kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means, including closed intake pool 1 and
The water pump 4 installed in closed intake pool 1 and the loudspeaker mouth of pipe 5, at the bottom of the intake pool of the underface of the loudspeaker mouth of pipe 5
The water guide cone arranged on plate, in the present invention, water guide cone is 1/4 elliptic cone taper platform 2,1/4 elliptic cone
Taper platform 2 is apart from the equal diameters of closed intake pool 1 rear wall distance with the loudspeaker mouth of pipe 5,1/4 elliptic cone
The height of taper platform 2 is at the bottom of the cone of 2/5,1/4 elliptic cone taper platform 2 of the water pump 4 loudspeaker mouth of pipe 5 diameter
Footpath and the water pump 4 loudspeaker mouth of pipe 5 equal diameters, the vertex of a cone footpath of 1/4 elliptic cone taper platform 2 is water pump 4 loudspeaker
The elliptic cone cross section of 7/25,1/4 elliptic cone taper platform 2 of the mouth of pipe 5 diameter is 1/4 elliptic cone,
The equation of 1/4 elliptic cone is:In formula: x is oval short axle, y is oval
Major axis.Wherein, 1/4 elliptic cone taper platform 2 is made up of Steel material or concrete.
Connected mode for 1/4 elliptic cone taper platform 2 with closed intake pool 1 base plate, it is possible to use
Two kinds: (1) described 1/4 elliptic cone taper platform 2 is shell structure, 1/4 elliptic cone taper platform 2 end
Around it is arranged on closed intake pool 1 base plate by bolt.(2) described 1/4 elliptic cone taper platform 2
For xoncrete structure, 1/4 elliptic cone taper platform 2 is integral with closed intake pool 1 bottom slab concreting.
A kind of closed intake pool 1/4 elliptic cone taper platform disappears vortex method, and the method is, closed enter
1/4 elliptic cone taper platform 2,1/4 elliptic cone taper platform 2 is set on the base plate of pond 1 and is being arranged on closing
Immediately below the water pump 4 loudspeaker mouth of pipe 5 in formula intake pool, the centrage of 1/4 elliptic cone taper platform 2 and water pump
4 axial lines overlap, and 1/4 elliptic cone taper platform 2 is apart from closed intake pool 1 rear wall distance and the loudspeaker mouth of pipe
The equal diameters of 5, the height of 1/4 elliptic cone taper platform 2 is the 2/5 of the water pump 4 loudspeaker mouth of pipe 5 diameter,
Footpath at the bottom of the cone of 1/4 elliptic cone taper platform 2 and the water pump 4 loudspeaker mouth of pipe 5 equal diameters, 1/4 elliptic cone face cone
7/25,1/4 elliptic cone taper platform 2 of the vertex of a cone a diameter of water pump 4 loudspeaker mouth of pipe 5 diameter of shape platform 2
Elliptic cone cross section is 1/4 elliptic cone, and the equation of 1/4 elliptic cone is:In formula:
X is oval short axle, and y is oval major axis.
In the present invention, prefabrication system can be used first to water 1/4 elliptic cone taper platform 2 and make, then be set
Put in closed intake pool 1 relevant position, it is possible in closed intake pool 1, use concrete cast-in-situ.1/4
Elliptic cone taper platform 2 must be fixedly arranged on the base plate of closed intake pool 1, prevents because of water pump 4 suction relatively
Causing greatly 1/4 elliptic cone taper platform 2 to be shifted over, cone can be poured together with base plate by fixing means,
For separately pour, available steel is drilled in closed intake pool 1 base plate drilling, by built-in screw thus solid
Fixed 1/4 elliptic cone taper platform 2.Operating process it is ensured that 1/4 elliptic cone taper platform 2 the conical surface smooth,
Avoid unnecessary drag losses.
We can set, and X is the 1/4 elliptic cone taper platform center distance to closed intake pool 1 rear wall；
DOnIt it is the upper surface diameter of 1/4 elliptic cone taper platform；DUnderIt it is the base diameter of 1/4 elliptic cone taper platform；
H is the height of 1/4 elliptic cone taper platform；D0For loudspeaker nozzle diameter.
The parameter of 1/4 elliptic cone taper platform 2: apart from distance X=1.0D of closed intake pool 1 rear wall0,
The whirlpool cone height H=0.4D that disappears of 1/4 elliptic cone taper platform0, footpath D at the bottom of the cone of 1/4 elliptic cone taper platformUnder
=1.0D0, the vertex of a cone footpath D of 1/4 elliptic cone taper platformOn=0.28D0。
Claims (5)
1. a closed intake pool 1/4 elliptic cone taper platform vortex reducing means, including closed intake pool (1)
And the water pump (4) installed in closed intake pool (1) and the loudspeaker mouth of pipe (5), the loudspeaker mouth of pipe (5) is just
The water guide cone arranged on the intake pool base plate of lower section, is characterized in that, described water guide cone is 1/4 elliptic cone face cone
Shape platform (2), 1/4 elliptic cone taper platform (2) is apart from closed intake pool (1) rear wall distance and oviduct
The equal diameters of mouth (5), the height of 1/4 elliptic cone taper platform (2) is water pump (4) the loudspeaker mouth of pipe (5)
The 2/5 of diameter, footpath at the bottom of the cone of 1/4 elliptic cone taper platform (2) is straight with water pump (4) the loudspeaker mouth of pipe (5)
Footpath is equal, and the vertex of a cone footpath of 1/4 elliptic cone taper platform (2) is water pump (4) the loudspeaker mouth of pipe (5) diameter
The elliptic cone cross section of 7/25,1/4 elliptic cone taper platform (2) is 1/4 elliptic cone, 1/4 elliptic cone
The equation in face is:In formula: x is oval short axle, y is oval major axis.
One the most according to claim 1 closed intake pool 1/4 elliptic cone taper platform vortex reducing means,
It is characterized in that, described 1/4 elliptic cone taper platform (2) is made up of Steel material or concrete.
One the most according to claim 1 closed intake pool 1/4 elliptic cone taper platform vortex reducing means,
It is characterized in that, described 1/4 elliptic cone taper platform (2) is shell structure, 1/4 elliptic cone taper platform (2)
The surrounding at the end is arranged on closed intake pool (1) base plate by bolt.
One the most according to claim 1 closed intake pool 1/4 elliptic cone taper platform vortex reducing means,
It is characterized in that, described 1/4 elliptic cone taper platform (2) is xoncrete structure, 1/4 elliptic cone taper platform
(2) integral with closed intake pool (1) bottom slab concreting.
5. closed intake pool 1/4 elliptic cone taper platform disappears a vortex method, it is characterized in that, closed
Arranging 1/4 elliptic cone taper platform (2) on intake pool (1) base plate, 1/4 elliptic cone taper platform (2) exists
Immediately below water pump (4) the loudspeaker mouth of pipe (5) being arranged in closed intake pool, 1/4 elliptic cone taper platform
(2) centrage overlaps with water pump (4) axial line, and 1/4 elliptic cone taper platform (2) is apart from closed
The equal diameters of intake pool (1) rear wall distance and the loudspeaker mouth of pipe (5), 1/4 elliptic cone taper platform (2)
The cone of 2/5,1/4 elliptic cone taper platform (2) that height is water pump (4) the loudspeaker mouth of pipe (5) diameter
Footpath, the end and water pump (4) the loudspeaker mouth of pipe (5) equal diameters, the vertex of a cone of 1/4 elliptic cone taper platform (2) is straight
Footpath is the elliptic cone of 7/25,1/4 elliptic cone taper platform (2) of water pump (4) the loudspeaker mouth of pipe (5) diameter
Cross section, face is 1/4 elliptic cone, and the equation of 1/4 elliptic cone is:In formula: x is
Oval short axle, y is oval major axis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510153321.XA CN104818699B (en) | 2015-04-01 | 2015-04-01 | A kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510153321.XA CN104818699B (en) | 2015-04-01 | 2015-04-01 | A kind of closed intake pool 1/4 elliptic cone taper platform vortex reducing means and method thereof |
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| CN104818699B true CN104818699B (en) | 2016-09-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106192934B (en) * | 2016-07-19 | 2018-06-19 | 中国农业大学 | A kind of guide-vane pumping plant intake pool water conservancy diversion vortex reducing means |
| CN106759665B (en) * | 2016-11-30 | 2023-04-07 | 华北水利水电大学 | Combined hydraulic rectifying device under ultralow water level of pump station water inlet pool |
| CN107489655B (en) * | 2017-09-29 | 2019-06-07 | 扬州大学 | Pump installation bell-shaped inflow passage with the suitable flowing plate of activity |
| CN107938758B (en) * | 2017-11-29 | 2018-11-20 | 扬州大学 | A kind of water inlet structure control whirlpool device based on fermat spiral |
| CN109469155B (en) * | 2018-11-15 | 2020-07-03 | 扬州大学 | Water inlet structure vortex control device based on equal-difference reducing arc line |
| CN110486922B (en) * | 2019-07-29 | 2024-02-06 | 西安建筑科技大学 | Round table-shaped guide plate device for vortex elimination in jet flow limited space |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE1528771C3 (en) * | 1966-01-27 | 1981-07-23 | Balcke-Dürr AG, 4630 Bochum | Specific high speed centrifugal pump |
| JP2002089479A (en) * | 2000-09-08 | 2002-03-27 | Hitachi Ltd | Suction water tank for vertical shaft pump |
| CN201581663U (en) * | 2009-12-30 | 2010-09-15 | 扬州大学 | Novel combined type vortex eliminating and preventing pump station intake sump |
| CN201704726U (en) * | 2010-01-28 | 2011-01-12 | 扬州大学 | Novel box culvert-type two-way water inflow passage |
| CN203035611U (en) * | 2012-12-22 | 2013-07-03 | 扬州大学 | Umbrella-type bothway vertical pump device |
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