GB2579431A - Adjustable plate type column for forebay of pumping station - Google Patents

Adjustable plate type column for forebay of pumping station Download PDF

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Publication number
GB2579431A
GB2579431A GB1911489.1A GB201911489A GB2579431A GB 2579431 A GB2579431 A GB 2579431A GB 201911489 A GB201911489 A GB 201911489A GB 2579431 A GB2579431 A GB 2579431A
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GB
United Kingdom
Prior art keywords
forebay
column
type column
plate type
pumping station
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1911489.1A
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GB201911489D0 (en
GB2579431B (en
Inventor
Liu Chao
Yang Fan
Chu Changhong
Lei Zhen
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Yangzhou University
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Yangzhou University
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Publication of GB201911489D0 publication Critical patent/GB201911489D0/en
Publication of GB2579431A publication Critical patent/GB2579431A/en
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Publication of GB2579431B publication Critical patent/GB2579431B/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/02—Water-ways
    • E02B9/04—Free-flow canals or flumes; Intakes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/22—Adaptations of pumping plants for lifting sewage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The column 6 is located, in use, in the forebay of a pumping station (shown in Fig. 6(b)) for directing waterflow and minimising turbulent flow 7. The column (detailed in Fig. 3) includes an adjusting plate (1), a rotating shaft (3) fixedly connected to the base of the forebay, a sleeve (2) rotatable around the shaft and limiting blocks or piers (4) located either side of the plate for limiting the rotation of plate about the shaft. The column located at the bend in the forebay, and the plate may rotate in response to high flow rate and may be limited to 20 degrees. The plate may be reinforced concrete or metal, and between 20-30 degrees to the incident flow direction. The sleeve may have outer and inner diameters of 1m and 0.5m respectively, and the plate may be 0.5m thick. Its width may be 1.5-2 times the width of the forebay (“B” Fig. 4). The location and angle of the column in the forebay path is selected to reduce the chance/size of turbulence (e.g. back eddies or “reflux” 7) at the pump sump 5 of the pump station.

Description

ADJUSTABLE PLATE TYPE COLUMN FOR FOREBAY OF PUMPING STATION TECHNICAL FIELD
The present invention relates to an adjustable plate type column for the forebay of a pumping station, which is applied to vortex control of a forebay and belongs to the technical field of water conservancy projects.
BACKGROUND
Pumping station inflow water sequentially flows a water diversion canal, a forebay and a pump sump. The forebay plays an important role in helping water flow to uniformly and smoothly flow from the water diversion canal to the pump sump to create an excellent hydraulic condition for operation of a water pump. Flowing effects of the water flow depend on its uniform diffusion situation, and the water flow in the forebay flows smoothly if a diffusion section of the forebay is relatively long and flows disorderly if the diffusion section of the forebay is relatively short. Generally, the diffusion section of a side-inflow forebay is relatively short, incoming flow needs to make a turn and then enters the forebay, and at this time the water flow is hard to uniformly diffilse, as shown in FIG. 6(a), which is easy to form bad flow patterns including reflux, vortex and the like so as to influence efficiency of the water pump, and in severe cases, to cause vibration, noises, cavitation and the like to influence normal operation of the water pump. Therefore, important ways of improving the efficiency of the water pump are to improve the flow patterns of the forebay, eliminate and weaken the reflux and the vortex in the forebay, and help the flow velocity and the flow direction of inlet section of a flow channel to be uniform. Generally the existing diversion pier for adjusting the water flow is fixed, but the flow rate of the pumping station is changed, so the direction and the range of bias flow are changed to influence water flow adjustment and control effects of the water diversion pier, which needs to be improved. SUMMARY The present invention relates to an adjustable plate type column for the forebay of a pumping station, where a column has an angle-changeable movable structure to meet adjustment and control requirements of water flow having different flow rates in different flow directions so as to ensure highly efficient operation of a pumping station.
Technical solutions of the present invention are as follows: An adjustable plate type column for the forebay of a pumping station includes a side forebay and a pump sump, where the column is arranged at a bend of the forebay and includes an adjusting plate, a rotating shaft and two limiting piers, the rotating shaft is fixedly connected with the bottom of the forebay, the middle portion of the adjusting plate is provided with a sleeve, the sleeve of the adjusting plate sleeves the rotating shaft and can rotate corresponding to the rotating shaft, and the two limiting piers are respectively located on the two sides of the adjusting plate and are used for controlling the rotation amplitude of the adjusting plate.
Furthermore, the column is located on an outer side of the bend, the width of the forebay is B, and a distance between the column and the pump sump is (1.5-2)B.
Furthermore, a connecting line between one limiting pier and the rotating shaft and a connecting line between the other limiting pier and the rotating shaft form an included angle of 20 degrees.
Furthermore, a plate surface of the adjusting plate and an incoming flow direction form an included angle in a range of 30-40 degrees.
Furthermore, the length of the adjusting plate is (0.2-0.3)B, the B is the width of the forebay, the thickness of the adjusting plate is 0.5 m, and a distance between the rotating shaft and an outer side wall of the bend is 0.4B.
Furthermore, the inner diameter of the sleeve is 0.5 m and the outer diameter thereof is 1 m. Furthermore, the cross section of the limiting pier is square, and the side length thereof is 0.5 m.
The beneficial effects of the present invention are: the present invention is applied to various pumping station inflow forebay designs, where a pump sump (a flow channel) is located behind the forebay, the adjustable plate type column of the present invention is located at a position having a certain distance in the front of the pump sump (the flow channel), a reflux with a certain size is generated in the front of the pump sump (the flow channel) after the water flow passes through the forebay, the reflux close to the pump sump (the flow channel) is remarkably reduced after passing through the adjustable plate type column to be rectified, and the reflux is shifted to the back of the adjustable plate type column. Therefore, the influence on the operation of the water pump by the reflux generated in the front of the pump sump (the flow channel) is greatly reduced. The plate type column rotates around the rotating shaft to be capable of adjusting a position of the column corresponding to the water flow to adapt to the change of the flow rate of the incoming flow so as to achieve the optimal water flow adjustment and control effect. The present invention is applicable to a side-inflow forebay and can improve the size and the position of the reflux in the front of the pump sump (the water channel) when the flow rate is changed such that the water flow more smoothly enters the flow channel, and the pumping station more stably operates.
On the basis of a great amount of numerical simulation calculations and model tests, it is obtained by analysis and reasoning that an optimal included angle between the adjusting plate and the incoming flow direction is 80-90 degrees. The flow rate of a main operation range of the pumping station is generally 0.6-1.2 times of the designed flow rate, the water flow has great flowing inertia and deviates to an outer side of the bend when the flow rate is great, the column is pushed to rotate clockwise to increase the included angle about 10 degrees, and vice versa. At this time, the included angle between the water flow and the column can still maintain in a range of 80-90 degrees to obtain the optimal rectification effects. The thickness of the adjusting plate has a tiny influence on the water flow and is determined by the structural strength.
Practical engineering has a great requirement of the vortex control solution using the adjustable plate type column of the present invention, and inter-basin water transfer and supply projects, irrigation and drainage projects and the like have a great amount of pumping station construction and renewal. The present invention is beneficial to improvement of the flow pattern of forebay water flow of various pumping stations, improves operation efficiency of the water pump, is easy to implement and has reliable technologies, wide application prospect and remarkable economic benefits.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an elevation view of an adjustable plate type column of the present invention; FIG. 2 is an axonometric view of a cross section of an adjustable plate type column of the present invention; FIG. 3 is a top plan view of an adjustable plate type column of the present invention; FIG. 4 is a top plan view of a forebay of an adjustable plate type column of the present invention; FIG. 5 is a three-dimensional perspective view of FIG. 4; FIG. 6(a) is a schematic diagram of a reflux of a side forebay which is not provided with an adjustable plate type column in the background; and FIG. 6(b) is a streamline diagram after an adjustable plate type column of the present invention conducts rectification in a forebay.
In the drawings: 1-adjusting plate, 2-sleeve, 3-rotating shaft, 4-limiting pier, 5-pump sump, 6-plate type column, and 7-reflux area.
DETAILED DESCRIPTION OF EMBODIMENTS
The present invention is applicable to a side-inflow forebay and is designed and drawn according to requirements of the design.
An adjustable plate type column for the forebay of a pumping station is provided, where the column is located in a forebay (in the front of a pump sump (a flow channel)). The adjustable plate type column includes a rotating shaft, an adjusting plate and two limiting piers, column cross sections of the adjustable plate type column are in shape of a circular ring (which is the shape of the cross section of a sleeve) and a rectangle (which is the shape of the cross section of the adjusting plate), the outer diameter of the circular ring is 1 m and the inner diameter thereof is 0.5 m; and the elevation of the adjustable plate type column top (the adjusting plate) is equal to the highest water level. A bevel edge of the bottom surface of the adjustable plate type column and an incoming flow direction form an included angle in a range of 30-40 degrees, the total length of the adjustable plate type column is (0.2-0.3)B, and the B is the width of the forebay. The adjustable plate type column is located (1.5-2)B in front of the pump sump (the flow channel), and the B is the width of the forebay.
The adjustable plate type column arranged in the the forebay of a pumping station is used for achieving adjustment and control of a reflux, improving distribution of the flow rate and controlling a flow separation position and range of the water flow. The adjusting plate can rotate around the rotating shaft to +/-10 degrees, the limiting piers are arranged, the cross section of the limiting pier is 0.5 m*0.5 m, and the height of the column above the bottom of the forebay is 0.5 m or is equal to the designed water level. The adjustable plate type column utilizes prefabricated reinforced concrete components or metal components, and the rotating shaft utilizes a stainless steel tube so as to have enough rigidity.
As shown in FIG. 6(a), side-inflow incoming flow has a trend to deviate to an outer side of a bend under the inertial effect, and according to Bernoulli's theorem, the pressure of an inner side of the bend is increased while the pressure of the outer side thereof is reduced so as to form an interior-high exterior-low pressure gradient of the cross section to cause generation of secondary flow. Therefore, the water flow in the bend flows in screw type and form a relatively great reflux area on the inner side of the bend.
It is obtained based on a great amount of tests and numerical simulation calculations that the plate type column is arranged at a position having a certain distance in the front of the pump sump to be capable of effectively controlling the formation of the reflux, improving the flow velocity distribution of inlet section of a pump sump and improving the efficiency of a water pump system, as shown in FIG. 6(b).
The adjustable plate type columns is arranged on the outer side of the bend, and a plate surface of the adjusting plate faces to the incoming flow such that the pressure of the water flow here is increased, the water flow flows to the inner side, simultaneously the flow velocity of the water flow on the inner side is increased, the pressure of the inner side is reduced, and the pressure of the inner side and the pressure of the outer side tend to balance. At this time, the secondary flow of the cross section is greatly weakened, and reflux formation conditions are eliminated. Instead, a reflux area is formed in a back area of the plate type column, and just like moving the original reflux area to a new position at the back of the plate type column. Reflux at the new position is significant to subsequent water flow adjustment, and the flow velocity distribution of the water flow in the inlet section of the pump sump is relatively uniform and can meet requirements of the water pump on inflow conditions.

Claims (7)

  1. What is claimed is: 1. An adjustable plate type column for the forebay of a pumping station, comprising a side forebay and a pump sump (5), wherein the column (6) is arranged at a bend of the forebay and comprises an adjusting plate (1), a rotating shaft (3) and two limiting piers (4), the rotating shaft is fixedly connected with the bottom of the forebay, the middle portion of the adjusting plate is provided with a sleeve (2), the sleeve of the adjusting plate sleeves the rotating shaft and can rotate corresponding to the rotating shaft, and the two limiting piers are respectively located on the two sides of the adjusting plate and are used for controlling the rotation amplitude of the adjusting plate.
  2. 2. The adjustable plate type column for the forebay of a pumping station according to claim 1, wherein the column is located on an outer side of the bend, the width of the forebay is B, and a distance between the column and the pump sump is (1.5-2)B.
  3. 3. The adjustable plate type column for the forebay of a pumping station according to claim 1, wherein a connecting line between one limiting pier and the rotating shaft and a connecting line between the other limiting pier and the rotating shaft form an included angle of 20 degrees.
  4. 4. The adjustable plate type column for the forebay of a pumping station according to claim 1, wherein a plate surface of the adjusting plate and an incoming flow direction form an included angle in a range of 30-40 degrees.
  5. 5. The adjustable plate type column for the forebay of a pumping station according to claim 1 or 2, wherein the length of the adjusting plate is (0.2-0.3)B, the B is the width of the forebay, the thickness of the adjusting plate is 0.5 m, and a distance between the rotating shaft and an outer side wall of the bend is 0.4B.
  6. 6. The adjustable plate type column for the forebay of a pumping station according to claim 1, wherein the inner diameter of the sleeve is 0.5 m and the outer diameter thereof is 1 m.
  7. 7. The adjustable plate type column for the forebay of a pumping station according to claim 1, wherein the cross section of the limiting pier is square, and the side length thereof is 0.5 m.
GB1911489.1A 2018-11-28 2019-08-12 Adjustable plate type column for forebay of pumping station Active GB2579431B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811436341.8A CN109235546A (en) 2018-11-28 2018-11-28 Forebay of Pumping Station adjustable plate-type column

Publications (3)

Publication Number Publication Date
GB201911489D0 GB201911489D0 (en) 2019-09-25
GB2579431A true GB2579431A (en) 2020-06-24
GB2579431B GB2579431B (en) 2020-12-16

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GB1911489.1A Active GB2579431B (en) 2018-11-28 2019-08-12 Adjustable plate type column for forebay of pumping station

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CN (1) CN109235546A (en)
GB (1) GB2579431B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114293518A (en) * 2022-01-06 2022-04-08 扬州大学 Y-shaped sedimentation type flow guide pier suitable for combination of gate station

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111139800B (en) * 2020-01-17 2024-03-12 华北水利水电大学 Adjustable vortex eliminating and rectifying device and vortex eliminating and rectifying method
CN114718034B (en) * 2022-04-19 2024-05-28 扬州大学 Discrete lifting guide pier and operation method thereof
CN116122237B (en) * 2023-01-12 2023-08-18 珠江水利委员会珠江水利科学研究院 Flow state adjustment system suitable for power plant circulating water runner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200999341Y (en) * 2007-01-12 2008-01-02 扬州大学 Side-wise inflow pumping station composite bottom ridge
CN201778317U (en) * 2010-09-06 2011-03-30 广东省电力设计研究院 Side inflow pump house diversion device
CN203222785U (en) * 2013-04-27 2013-10-02 扬州大学 Y-shaped flow guiding pier used for forebay rectification
JP2017166415A (en) * 2016-03-16 2017-09-21 株式会社荏原製作所 Drain water machine field and drainage method
CN107489655A (en) * 2017-09-29 2017-12-19 扬州大学 Pump installation bell-shaped inflow passage with the suitable flowing plate of activity

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1222748A1 (en) * 1983-01-10 1986-04-07 Среднеазиатский Ордена Трудового Красного Знамени Научно-Исследовательский Институт Ирригации Им.В.Д.Журина Apparatus for varying the structure of stream at expansion portion
RU2034952C1 (en) * 1989-12-21 1995-05-10 Шахов Александр Викторович Water flow energy suppressor for water-carrying constructions
CN204570628U (en) * 2015-03-18 2015-08-19 扬州大学 The fairing that a kind of pumping plant is combined
CN206359948U (en) * 2016-10-27 2017-07-28 扬州大学 A kind of deflector experimental provision for simulating lateral intake feature
CN207538118U (en) * 2017-11-29 2018-06-26 扬州大学 A kind of column training wall for improving lateral intake pumping plant fluidised form

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200999341Y (en) * 2007-01-12 2008-01-02 扬州大学 Side-wise inflow pumping station composite bottom ridge
CN201778317U (en) * 2010-09-06 2011-03-30 广东省电力设计研究院 Side inflow pump house diversion device
CN203222785U (en) * 2013-04-27 2013-10-02 扬州大学 Y-shaped flow guiding pier used for forebay rectification
JP2017166415A (en) * 2016-03-16 2017-09-21 株式会社荏原製作所 Drain water machine field and drainage method
CN107489655A (en) * 2017-09-29 2017-12-19 扬州大学 Pump installation bell-shaped inflow passage with the suitable flowing plate of activity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114293518A (en) * 2022-01-06 2022-04-08 扬州大学 Y-shaped sedimentation type flow guide pier suitable for combination of gate station
CN114293518B (en) * 2022-01-06 2023-03-31 扬州大学 Y-shaped sedimentation type flow guide pier suitable for combination of gate station

Also Published As

Publication number Publication date
CN109235546A (en) 2019-01-18
GB201911489D0 (en) 2019-09-25
GB2579431B (en) 2020-12-16

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