CN111455926A - Device and method for improving flow state of curve slope of pump station by compounding 30-degree fan - Google Patents
Device and method for improving flow state of curve slope of pump station by compounding 30-degree fan Download PDFInfo
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- CN111455926A CN111455926A CN202010456883.2A CN202010456883A CN111455926A CN 111455926 A CN111455926 A CN 111455926A CN 202010456883 A CN202010456883 A CN 202010456883A CN 111455926 A CN111455926 A CN 111455926A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000013329 compounding Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
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- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a device and a method for improving the flow state of a slope of a bend of a pump station by compounding a 30-degree fan, wherein the device comprises a fan-shaped rectifying device, and the fan-shaped rectifying device is arranged at the bend of a lateral water inlet flow passage of the pump station; the fan-shaped rectifying device comprises 5 guide grids and a grid, wherein the 5 guide grids are respectively a first guide grid, a second guide grid, a third guide grid, a fourth guide grid and a fifth guide grid; the front ends and the tail ends of the first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid and the fifth flow guide grid are respectively provided with a grid, one end of each grid is fixed on a side slope of a curve of a lateral water inlet channel of the pump station, and the other end of each grid is fixed on the first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid and the fifth flow guide grid. By the invention, the flow state problem and the flow velocity distribution at the side slope of the curve are improved, and the adjustment distance of the flow velocity distribution at the straight line transition section is greatly shortened.
Description
Technical Field
The invention relates to a device and a method for improving the flow state of a side slope of a bend of a pump station by compounding a 30-degree fan, and belongs to the field of hydraulic engineering.
Background
Limited by engineering arrangement, certain newly-built pump station engineering can only adopt the side direction pump station of intaking. However, a series of backflow is easily formed at the side slope of the curve of the lateral water inlet pump station, and a low-speed water flow area is generated, so that the water inlet condition of the water pump is poor. The flow velocity distribution of water flow at the bend of the lateral water inlet pump station is generally determined by the ranges of a vortex area and a low-speed area at a side slope. The distance of the adjusting section for recovering the normal flow velocity distribution of the water flow after the water flow is bent is long. Therefore, a fan-shaped flow state improving measure is additionally arranged at the side water inlet bend, which is beneficial to reducing the range of the vortex and the low-speed area at the side slope, so that the flow speed of the over-bent water flow can be restored to a normal distribution state in a short transition section.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a device and a method for improving the flow state of a side slope of a bend of a pump station by compounding a 30-degree sector for a low-speed area and a backflow area which are arranged at the side slope of the bend of a side-inlet pump station.
The invention aims to realize the purpose that a 30-degree combined fan-shaped device for improving the flow state of the side slope of the bend of a pump station is characterized by comprising a fan-shaped rectifying device, wherein the fan-shaped rectifying device is arranged at the bend of a lateral water inlet flow passage of the pump station;
the fan-shaped rectifying device comprises 5 guide grids and a grid, wherein the 5 guide grids are respectively a first guide grid, a second guide grid, a third guide grid, a fourth guide grid and a fifth guide grid;
setting the depth of a lateral water inlet flow channel of a front pool water pump station of a lateral water inlet pump station as h, and the diameter of a water pump impeller in the pump station as D;
the distance between the first flow guide grid and the side slope of the curve of the lateral water inlet channel of the pump station is 1.4D, the distance between the first flow guide grid and the second flow guide grid is 1.6D, the distance between the second flow guide grid and the third flow guide grid is 1.8D, the distance between the third flow guide grid and the fourth flow guide grid is 2.0D, and the distance between the fourth flow guide grid and the fifth flow guide grid is 2.2D; the arrangement angles of the first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid and the fifth flow guide grid are all 30 degrees, and the heights are all h;
the front ends and the tail ends of the first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid and the fifth flow guide grid are respectively provided with a grid, one end of each grid is fixed on a side slope of a curve of a lateral water inlet channel of the pump station, and the other end of each grid is fixed on the first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid and the fifth flow guide grid.
The grating is formed by crossing a plurality of transverse grating strips and a plurality of vertical grating strips.
The first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid and the fifth flow guide grid are all in the shape of guide vanes with thin parallel cylindrical surfaces.
A use method of a 30-degree combined fan-shaped device for improving the flow state of a side slope of a bend of a pump station is characterized by comprising a fan-shaped rectifying device, wherein the fan-shaped rectifying device is arranged at the bend of a lateral water inlet flow passage of the pump station;
the water flow entering the bend of the lateral water inlet channel of the pump station flows back through the first flow guide grid, the second flow guide grid, the third flow guide grid, the fourth flow guide grid, the fifth flow guide grid and the grids of the fan-shaped rectifying device to be rectified, regulated and controlled, the flow velocity distribution is improved, the flow shedding position and range of the water flow are controlled, the formation of the back flow is controlled, and the flow velocity distribution of the water flow is improved;
the water flow is uniformly divided after passing through the front-end grating, the momentum of the water flow is uniformly distributed, the first flow guide grating, the second flow guide grating, the third flow guide grating, the fourth flow guide grating and the fifth flow guide grating play a role in guiding and steering the water flow, meanwhile, the first flow guide grating, the second flow guide grating, the third flow guide grating, the fourth flow guide grating and the fifth flow guide grating provide extra centripetal force for the water flow, the flow speed difference between the inner side and the outer side is reduced, the backflow problem at the inner side slope of the curve of the lateral water inlet channel of the pump station is solved, and the longitudinal flow speed of the water flow passing through the first flow guide grating, the second flow guide grating, the third flow guide grating, the fourth flow guide grating and the fifth flow guide grating is rapidly recovered to be normally distributed by the tail-end grating.
The device and the method for improving the flow state of the side slope of the bend of the pump station by compounding the 30-degree fan shape are reasonable in structure, easy to produce and manufacture and convenient to use, and the device is arranged at the bend of a lateral water inlet flow passage of the pump station and comprises 5 guide grids and a plurality of grids. The pump station side direction inlet channel depth of water h, water pump impeller diameter is D. The guide grids (including a first guide grid, a second guide grid, a third guide grid, a fourth guide grid and a fifth guide grid) adopt a guide vane shape of a thin parallel cylindrical surface. According to the principle that the distance between the guide grids is gradually increased from the inner side wall to the outer side wall, the distances between the 5 guide grids are respectively 1.4D, 1.6D, 1.8D, 2.0D and 2.2D. The setting angles of the 5 guide grids are all 30 degrees, and the heights are all h. The grids are arranged at the front end and the tail end of the flow guide grid. And in the transverse direction, one end of each grid is fixed on the side slope through a grid groove, the other end of each grid is fixed on the 5 th flow guide grid (the fifth flow guide grid), and the distance between every two grids is uniformly distributed.
Has the advantages that: the invention can change the condition of the side slope, improve the flow state problem and the flow velocity distribution at the side slope of the curve, and greatly shorten the adjustment distance of the flow velocity distribution at the linear transition section. Compared with the traditional rectification mode, the invention can effectively break the circulation, adjust the flow velocity distribution after bending, and make the water flow distribution among the diversion grids more uniform, thereby greatly improving the operation efficiency of the pump station.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a fan-shaped rectifying device according to the present invention;
FIG. 3 is a schematic view of a fan-shaped fairing of the present invention;
FIG. 4 is a flow of water without the addition of the apparatus of the present invention;
FIG. 5 is a flow pattern with the addition of the apparatus of the present invention;
in the figure: 1 first flow guiding grid, 2 second flow guiding grid, 3 third flow guiding grid, 4 fourth flow guiding grid, 5 fifth flow guiding grid, 6 grid and 7 side slope.
Detailed Description
The invention is further described with reference to the accompanying drawings and the description thereof.
A30-degree combined fan-shaped device for improving the flow state of a side slope of a bend of a pump station is characterized by comprising a fan-shaped rectifying device, wherein the fan-shaped rectifying device is arranged at the bend of a lateral water inlet flow passage of the pump station;
the fan-shaped rectifying device comprises 5 guide grids and a grid 6, wherein the 5 guide grids are respectively a first guide grid 1, a second guide grid 2, a third guide grid 3, a fourth guide grid 4 and a fifth guide grid 5;
setting the depth of a lateral water inlet flow channel of a front pool water pump station of a lateral water inlet pump station as h, and the diameter of a water pump impeller in the pump station as D;
the distance between the first flow guide grid (1) and the side slope of the lateral water inlet runner bend of the pump station is 1.4D, the distance between the first flow guide grid (1) and the second flow guide grid (2) is 1.6D, the distance between the second flow guide grid (2) and the third flow guide grid (3) is 1.8D, the distance between the third flow guide grid (3) and the fourth flow guide grid (4) is 2.0D, and the distance between the fourth flow guide grid (4) and the fifth flow guide grid (5) is 2.2D; the arrangement angles of the first flow guide grid 1, the second flow guide grid 2, the third flow guide grid 3, the fourth flow guide grid 4 and the fifth flow guide grid 5 are all 30 degrees, and the heights are all h; the front ends and the tail ends of the first flow guide grid 1, the second flow guide grid 2, the third flow guide grid 3, the fourth flow guide grid 4 and the fifth flow guide grid 5 are respectively provided with a grid 6, one end of each grid 6 is fixed on a side slope of a curve of a lateral water inlet channel of the pump station, and the other end of each grid 6 is fixed on the first flow guide grid 1, the second flow guide grid 2, the third flow guide grid 3, the fourth flow guide grid 4 and the fifth flow guide grid 5.
The grating 6 is formed by crossing a plurality of transverse grating strips and a plurality of vertical grating strips. The first flow guide grid 1, the second flow guide grid 2, the third flow guide grid 3, the fourth flow guide grid 4 and the fifth flow guide grid 5 are all in the shape of guide vanes with thin parallel cylindrical surfaces.
When in use, the fan-shaped rectifying device is arranged at the bend of the lateral water inlet flow passage of the pump station; the water flow entering the bend of the lateral water inlet channel of the pump station flows back through the first flow guide grid 1, the second flow guide grid 2, the third flow guide grid 3, the fourth flow guide grid 4, the fifth flow guide grid 5 and the grid 6 of the fan-shaped rectifying device, so that the flow velocity distribution is improved, the flow shedding position and range of the water flow are controlled, the formation of the backflow is controlled, and the flow velocity distribution of the water flow is improved.
The water flow is uniformly divided after passing through the front-end grating 6, the momentum of the water flow is uniformly distributed, the first flow guide grating 1, the second flow guide grating 2, the third flow guide grating 3, the fourth flow guide grating 4 and the fifth flow guide grating 5 play a role in guiding and steering the water flow, meanwhile, the first flow guide grating 1, the second flow guide grating 2, the third flow guide grating 3, the fourth flow guide grating 4 and the fifth flow guide grating 5 provide extra centripetal force for the water flow, the difference of the flow speed of the inner side and the outer side is reduced, and therefore the backflow problem at the inner side slope of the curve of the lateral water inlet channel of the pump station is solved, and the longitudinal flow speed of the water flow passing through the first flow guide grating 1, the second flow guide grating 2, the third flow guide grating 3, the fourth flow guide grating 4 and the fifth flow guide grating 5 is rapidly recovered to be normally distributed by the tail-.
In the device, a first flow guide grid 1, a second flow guide grid 2, a third flow guide grid 3, a fourth flow guide grid 4, a fifth flow guide grid 5 and a grid 6 adopt prefabricated reinforced concrete members or metal members and have enough rigidity.
As shown in fig. 3, the incoming flow of the side intake water tends to be biased to the outside of the curve by inertia, so that the pressure at the inside of the curve increases, while the pressure at the outside decreases, and a backflow region and a low-speed region are easily formed at the slope of the curve.
The method is obtained through a large number of tests and numerical simulation calculation, backflow can be effectively controlled by arranging a composite 30-degree fan-shaped rectification measure at the bend, the flow velocity distribution of water flow is improved, and the efficiency of a water pump system is improved, as shown in fig. 4.
Claims (4)
1. A30-degree combined fan-shaped device for improving the flow state of a side slope of a bend of a pump station is characterized by comprising a fan-shaped rectifying device, wherein the fan-shaped rectifying device is arranged at the bend of a lateral water inlet flow passage of the pump station;
the fan-shaped rectifying device comprises 5 guide grids and a grid (6), wherein the 5 guide grids are respectively a first guide grid (1), a second guide grid (2), a third guide grid (3), a fourth guide grid (4) and a fifth guide grid (5);
setting the depth of a lateral water inlet flow channel of a pump station as h, and the diameter of a water pump impeller in the pump station as D;
the distance between the first flow guide grid (1) and the side slope of the lateral water inlet runner bend of the pump station is 1.4D, the distance between the first flow guide grid (1) and the second flow guide grid (2) is 1.6D, the distance between the second flow guide grid (2) and the third flow guide grid (3) is 1.8D, the distance between the third flow guide grid (3) and the fourth flow guide grid (4) is 2.0D, and the distance between the fourth flow guide grid (4) and the fifth flow guide grid (5) is 2.2D; the arrangement angles of the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4) and the fifth flow guide grid (5) are all 30 degrees, and the heights are all h;
the front ends and the tail ends of the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4) and the fifth flow guide grid (5) are respectively provided with a grid (6), one end of each grid (6) is fixed on a side slope of a lateral water inlet channel bend of a pump station, and the other end of each grid (6) is fixed on the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4) and the fifth flow guide grid (5).
2. The device for improving the flow state of the side slope of the bend of the pump station in a combined 30-degree fan shape according to claim 1, wherein the grating (6) is formed by crossing a plurality of transverse grating bars and a plurality of vertical grating bars.
3. The device for improving the flow state of the side slope of the bend of the pump station in a combined 30-degree fan shape according to claim 1, wherein the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4) and the fifth flow guide grid (5) are all in the shape of guide vanes with thin parallel cylindrical surfaces.
4. The use method of the composite 30-degree fan-shaped device for improving the flow state of the side slope of the bend of the pump station according to any one of claims 1 to 3 is characterized by comprising a fan-shaped rectifying device, wherein the fan-shaped rectifying device is arranged at the bend of a lateral water inlet channel of the pump station;
the water flow entering the bend of the lateral water inlet channel of the pump station flows back through the rectification regulation and control of the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4), the fifth flow guide grid (5) and the grid (6) of the fan-shaped rectifying device, the flow velocity distribution is improved, the flow shedding position and range of the water flow are controlled, the formation of the back flow is controlled, and the flow velocity distribution of the water flow is improved;
the water flow is evenly divided after passing through the front end grating (6), the momentum of the water flow is evenly distributed, the first flow guide grating (1), the second flow guide grating (2), the third flow guide grating (3), the fourth flow guide grating (4) and the fifth flow guide grating (5) play a role in guiding and turning the water flow, meanwhile, the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4) and the fifth flow guide grid (5) provide extra centripetal force for water flow, reduce the flow speed difference between the inner side and the outer side, therefore, the backflow problem at the side slope at the inner side of the curve of the lateral water inlet channel of the pump station is solved, and the longitudinal flow velocity of water flow passing through the first flow guide grid (1), the second flow guide grid (2), the third flow guide grid (3), the fourth flow guide grid (4) and the fifth flow guide grid (5) is rapidly recovered to be distributed normally by the grid (6) at the tail end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456883.2A CN111455926A (en) | 2020-05-26 | 2020-05-26 | Device and method for improving flow state of curve slope of pump station by compounding 30-degree fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456883.2A CN111455926A (en) | 2020-05-26 | 2020-05-26 | Device and method for improving flow state of curve slope of pump station by compounding 30-degree fan |
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| CN111455926A true CN111455926A (en) | 2020-07-28 |
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| CN202010456883.2A Pending CN111455926A (en) | 2020-05-26 | 2020-05-26 | Device and method for improving flow state of curve slope of pump station by compounding 30-degree fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790770A (en) * | 2022-04-26 | 2022-07-26 | 扬州大学 | Guiding device in sewage inspection well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342462A (en) * | 2008-08-21 | 2009-01-14 | 北京国电龙源环保工程有限公司 | Device and method for even distribution of pneumatic flow field |
| CN201778317U (en) * | 2010-09-06 | 2011-03-30 | 广东省电力设计研究院 | Side inflow pump house diversion device |
| CN205659562U (en) * | 2016-05-18 | 2016-10-26 | 福建龙净环保股份有限公司 | Drainage and fairing suitable for SCR flue gas denitration system |
| CN206027440U (en) * | 2016-08-23 | 2017-03-22 | 河北易东环保工程有限公司 | Locate SCR denitration flue gas guide device at flue turn |
| JP2017166415A (en) * | 2016-03-16 | 2017-09-21 | 株式会社荏原製作所 | Drain water machine field and drainage method |
| CN207585880U (en) * | 2017-12-21 | 2018-07-06 | 钦州学院 | A kind of self-loopa smoke wind tunnel for reducing disturbance |
| CN212294521U (en) * | 2020-05-26 | 2021-01-05 | 扬州大学 | Compound 30 fan-shaped pump station bend side slope flow state devices that improves |
-
2020
- 2020-05-26 CN CN202010456883.2A patent/CN111455926A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342462A (en) * | 2008-08-21 | 2009-01-14 | 北京国电龙源环保工程有限公司 | Device and method for even distribution of pneumatic flow field |
| CN201778317U (en) * | 2010-09-06 | 2011-03-30 | 广东省电力设计研究院 | Side inflow pump house diversion device |
| JP2017166415A (en) * | 2016-03-16 | 2017-09-21 | 株式会社荏原製作所 | Drain water machine field and drainage method |
| CN205659562U (en) * | 2016-05-18 | 2016-10-26 | 福建龙净环保股份有限公司 | Drainage and fairing suitable for SCR flue gas denitration system |
| CN206027440U (en) * | 2016-08-23 | 2017-03-22 | 河北易东环保工程有限公司 | Locate SCR denitration flue gas guide device at flue turn |
| CN207585880U (en) * | 2017-12-21 | 2018-07-06 | 钦州学院 | A kind of self-loopa smoke wind tunnel for reducing disturbance |
| CN212294521U (en) * | 2020-05-26 | 2021-01-05 | 扬州大学 | Compound 30 fan-shaped pump station bend side slope flow state devices that improves |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790770A (en) * | 2022-04-26 | 2022-07-26 | 扬州大学 | Guiding device in sewage inspection well |
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