CN108534846A - A kind of drawing type portable weir body and flow-measuring method - Google Patents
A kind of drawing type portable weir body and flow-measuring method Download PDFInfo
- Publication number
- CN108534846A CN108534846A CN201810209992.7A CN201810209992A CN108534846A CN 108534846 A CN108534846 A CN 108534846A CN 201810209992 A CN201810209992 A CN 201810209992A CN 108534846 A CN108534846 A CN 108534846A
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- weir
- weir plate
- plate
- water
- flow
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
Abstract
A kind of drawing type portable weir body of present invention offer and flow-measuring method, the weir body include：Weir plate, water fender and pull plate；Weir plate includes the first weir plate arranged vertically, the 4th weir plate of the second weir plate arranged vertically, horizontally disposed third weir plate and vertical arrangement, first weir plate and the second weir plate are vertically connected at third weir plate upper surface, 4th weir plate is vertically connected at third weir plate lower surface, first weir plate and the second weir plate parallel arrangement, third weir plate are provided centrally with first through hole；Water fender is set between the first weir plate and the second weir plate, and water fender height is adjustable；Pull plate is located at the lower surface of third weir plate, pull plate and third weir plate parallel arrangement, and distance is adjustable between pull plate and the 4th weir plate.Drawing type portable weir body provided by the invention avoids sediment siltation and is had an impact to flow-shape, has the characteristics that sediment trapping and takes surface layer water water, meet irrigated area final stage canal capacity is small, changes in flow rate frequently, high concentration of sediment equivalent water requirement.
Description
Technical field
The present invention relates to hydrology current measured technology fields, more particularly, to a kind of drawing type portable weir body and flow
Measurement method.
Background technology
With water resources shortage aggravation and other agricultural water is tied up with water, objective requirement dry land agriculture water is from thick
The Irrigation put is to intensive precision irrigation Mode change, so that limited water resource meets the need of more field irrigations.It fills
The development and application of area's water consumption survey technology is one of the fundamental way that agricultural water realizes essence amount management of the use of water.Study channel flow
Amount measurement method and apparatus can ensure that peasant household irrigates in due course, in right amount, improve irrigation water using efficiency, promotion irrigated areas administration is horizontal, rush
Into the sustainable development of agricultural.
Up to the present, the domestic equipment of water measuring in irrigation district to have come into operation is up to more than 100 kinds, such as various weirs, flume,
Measure water sill, water meter, flowmeter and nozzle, casing, injection well downhole flow regulator etc..Divide from water gaging method, there is waterwork object amount water, spy
If water measure equipment amount water；Divide from equipment principle, there is mechanics, electricity, acoustics, calorifics, optics, atomic energy etc.；From device structure
Upper point, there are positive displacement, vane type, differential pressure type, variable area formula, momentum-type, impulse type, electromagnetic type, ultrasonic type etc..It is measuring in China
Although the research in terms of wetting system constantly makes progress, due to having exceeded the ability to shoulder economically in irrigated area and water user, some
There are no large-scale promotion applications in irrigated area for novel sophisticated equipment.The current common water gaging method in irrigated area have hydraulic structure,
Ad hoc water-measuring device, current meter, buoy, water gauge and instrument amount water etc..The requirement for measuring water with irrigated area is continuously improved and measures water bar
The limitation of part, some methods seldom use, though as buoy, water gauge amount water are economical simple, flow measurement precision is low；Current meter takes
When, laborious testing calculating is complicated, and untrained personnel can not verify supervision, it is difficult to obtain users to trust, to a certain extent shadow
The enthusiasm that water rate is paid at family of pouring water is rung, so only applying flow measurement and calibration on a small number of irrigated area backbone channels.And utilize water conservancy project
Building (weir, lock, hole, culvert etc.) measure water, go out stream be difficult meet a certain amount water HYDRODYNAMIC CONDITION RELATING TO, especially for bucket, field ditch,
Cause water-measuring device not in place since its canal capacity is small, changes in flow rate is frequent, luffing is big, high concentration of sediment, more impurity, gradient are slow,
It can not accomplish the target of " amount water to mouth ".
Invention content
In order to overcome the above-mentioned problems in the prior art, the present invention to provide a kind of drawing type portable amount at least partly
Mill weir body and flow-measuring method.
According to an aspect of the present invention, a kind of drawing type portable weir body is provided, including：Weir plate, water fender and
Pull plate；
Wherein, the weir plate includes the first weir plate arranged vertically, the second weir plate arranged vertically, horizontally disposed third
The 4th weir plate of weir plate and vertical arrangement, first weir plate and second weir plate are vertically connected at the third weir plate
Upper surface, the 4th weir plate are vertically connected at the lower surface of the third weir plate, first weir plate and second weir plate
Parallel arrangement, the third weir plate are provided centrally with first through hole；
The water fender is set between first weir plate and second weir plate, and the height of the water fender is adjustable；
The pull plate is located at the lower surface of the third weir plate, the pull plate and third weir plate parallel arrangement,
Distance is adjustable between the pull plate and the 4th weir plate.
Wherein, the length phase of first weir plate, second weir plate, the third weir plate and the 4th weir plate
Together, the height of first weir plate, second weir plate and the 4th weir plate is identical.
Wherein, the length of the water fender is identical with the length of first weir plate.
Wherein, the length of the pull plate is identical as the length of the first weir plate.
Wherein, the both sides of third weir plate lower surface are both provided with sliding slot, and the pull plate is arranged on the sliding slot；
Wherein, the pull plate is slided by the sliding slot, to adjust the distance between the pull plate and the 4th weir plate.
Wherein, the both sides of the water fender are both provided with the second through-hole, pass through second through-hole to adjust by bolt
The height of the water fender.
Wherein, the cross section of the first through hole is round or rectangle.
According to a further aspect of the invention, a kind of flow measurement side based on above-mentioned drawing type portable weir body is provided
Method, including：Upstream based on discharge coefficient, the hydraulic radius of drawing type portable weir body and drawing type portable weir body
Water level obtains flow parameter.
To sum up, a kind of drawing type portable weir body of present invention offer and flow-measuring method, by being arranged in the first weir
Water fender between plate and the second weir plate adjusts height of water level, by being arranged in the lower surface of third weir plate, and and third
The pull plate of weir plate parallel arrangement adjusts its distance between the 4th weir plate, so that flow is from the centrally disposed of third weir plate
First through hole under let out, have the characteristics that sediment trapping and take surface layer water water, disclosure satisfy that irrigated area final stage canal capacity is small, flow becomes
Change frequently, luffing is big, high concentration of sediment, more impurity, gentle slope drop equivalent water requirement, it is simple in structure, cheap while avoiding silt
Siltation has an impact flow-shape.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram according to a kind of drawing type portable weir body of the embodiment of the present invention；
Fig. 2 is the structural representation according to flow measurement experimental rig in a kind of flow-measuring method of the embodiment of the present invention
Figure；
The relational graph of discharge coefficient and flow when Fig. 3 is pull plate standard-sized sheet；
Fig. 4 is the relational graph of different hydraulic radiuses dirty coefficient of discharge and flow.
Reference numeral：
1- water fenders；2- pull plates；The first weir plates of 3-；The second weir plates of 4-；5- third weir plates；The 4th weir plates of 6-；7- first
Through-hole.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing, to the embodiment of the present invention
In technical solution be explicitly described, it is clear that described embodiment is a part of the embodiment of the present invention, rather than complete
The embodiment in portion.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 1 is the structural schematic diagram according to a kind of drawing type portable weir body of the embodiment of the present invention, as shown in Figure 1,
Including：Weir plate, water fender 1 and pull plate 2；Wherein,
The weir plate includes the first weir plate 3 arranged vertically, the second weir plate 4 arranged vertically, horizontally disposed third weir
The 4th weir plate 6 of plate 5 and vertical arrangement, first weir plate 3 and second weir plate 4 are vertically connected at the third weir plate
5 upper surface, the 4th weir plate 6 are vertically connected at the lower surface of the third weir plate 5, first weir plate 3 and described
Two weir plates 4 are arranged in parallel, and the third weir plate 5 is provided centrally with first through hole 7；
The water fender 1 is set between first weir plate 3 and second weir plate 4, and the height of the water fender 1 can
It adjusts；
The pull plate 2 is located at the lower surface of the third weir plate 5, the cloth parallel with the third weir plate 5 of the pull plate 2
It sets, distance is adjustable between the pull plate 2 and the 4th weir plate 6.
Wherein, the determination of 7 size of first through hole needs to make it in the actual landform for meeting irrigated area, disclosure satisfy that end
The water diversion flow of grade channel.The premise of the size design of pull plate 2 is the size of weir plate, and weir is determined based on 7 size of first through hole
The length and width of plate, and determine the size of pull plate 2.The height of weir plate is designed according to channel silt height.
Wherein, 1 part of the water fender is stretchable, requires suitably to stretch according to water blocking and draws the water fender 1.
Preferably, the both sides of the water fender 1 are both provided with the second through-hole, pass through second through-hole to adjust by bolt
Save the height of the water fender.Other can realize adjust water fender 1 height structure can also, differ in the present embodiment
One lists.
Wherein, pull plate 2 and the 4th weir plate 6 are arranged vertically.Specifically, it is pulled open with pull plate 2, discharge area becomes larger, water
Stream can promote pull plate 2, area of passage becomes smaller, and the water flow of first through hole reduces by being let out under first through hole.
In embodiments of the present invention, water level height is adjusted by being arranged in the water fender between the first weir plate and the second weir plate
Degree adjusts itself and the 4th weir by being arranged in the lower surface of third weir plate, and with the pull plate of third weir plate parallel arrangement
Distance between plate has sediment trapping and takes surface layer water so that flow is let out under the centrally disposed first through hole of third weir plate
The characteristics of water, disclosure satisfy that irrigated area final stage canal capacity is small, changes in flow rate is frequent, luffing is big, high concentration of sediment, more impurity, gentle slope drop
The requirement of equivalent water, it is simple in structure, cheap while avoiding sediment siltation flow-shape is had an impact.
It is understood that first weir plate 3, second weir plate 4, the third weir plate 5 and the 4th weir
The length of plate 6 is identical, and the height of first weir plate 3, second weir plate 4 and the 4th weir plate 6 is identical.
It is understood that the length of the water fender 1 is identical with the length of first weir plate 3.
It is understood that the length of the pull plate 2 is identical as the length of first weir plate 3.
On the basis of the above embodiments, the both sides of 5 lower surface of third weir plate are both provided with sliding slot, the pull plate
2 are arranged on the sliding slot；
Wherein, the pull plate 2 is slided by the sliding slot, to adjust the pull plate 2 and the 4th weir plate 6
The distance between.
On the basis of the above embodiments, the cross section of the first through hole is round or rectangle.
Preferably, the cross section of the first through hole is circle in embodiments of the present invention.
On the basis of the above embodiments, the embodiment of the present invention provides a kind of flow-measuring method, including：Based on flow system
The upstream water level of number, the hydraulic radius of drawing type portable weir body and drawing type portable weir body obtains flow parameter.
The acquisition formula of the flow parameter is specially：
Q=Av1
A=ε1R'H0
Wherein, R ' is the improved model of hydraulic radius, that is, is defined as：Water is tested by orifice plate upper surface, water fender and both sides
The ratio between the length of side that the cuboid volume that the cell wall of slot surrounds is contacted with water body；H is head on weirs, m；α0, α1For the dynamic of corresponding section
It can correction factor；Efflux coefficient；V0For the mean flow rate of 0-0 sections, i.e. velocity of approach, m/s；V1For the mean flow of 1-1 sections
Speed, m/s；Indicate the average value of 1-1 section piezometric heads, m；G is acceleration of gravity, m2/s；H0For weir crest total head,
m；ε1, ε is correction factor；ζ is local loosening；A is discharge area, m2；CdFor discharge coefficient；Q is flow, m/s；b
For weir bottom width, m.
Drawing type portable weir body can realize the flow control that channel is installed to it, and going out to flow formula should carry out in detail
Analysis and research.It is analyzed below for drawing type portable weir body principle of measuring runoff and opening/shutting mode, determines drawing and pulling type
Weir body difference goes out under stream mode to go out to flow formula, to meet the application of gate in practice in irrigated area.
Fig. 2 is the structural representation according to flow measurement experimental rig in a kind of flow-measuring method of the embodiment of the present invention
Figure, as shown in Fig. 2, including：Experimental tank, flow regulator, flow measurement device, drawing type portable weir body and water
Level measuring arrangement；Wherein,
The upstream stabilization area arranged successively, experimental observation area and downstream flow area are constituted in the experimental tank；
The upstream stabilization area is provided with water inlet, and downstream flow area is provided with water outlet；
The flow regulator is set to the upstream stabilization area；
The experimental observation area and downstream flow area are both provided with the level measurement device；
The drawing type portable weir body is set to downstream flow area；
The flow measurement device is set to the water inlet of the upstream stabilization area.
Preferably, level measurement device is piezometric level stylus.It is set to the piezometric level stylus in downstream flow area
Apart from downstream flow area terminal 127cm.
Preferably, experimental tank is the multifunction test sink of long 6.3m, width 0.8m, high 0.59m, and upstream stabilization area uses
Bottom intakes, and reduces flow turbulence, while ensureing that water inlet line is in full packages stream mode, meets upstream stabilization area water inlet and set
The use condition for the flow measurement device set obtains the stream of test requirements document by frequency conversion box control valve aperture and running frequency
Amount；Using flow regulator stationary flow, ensure that water flow stationary enters experimental observation area.Test observation area side is using transparent
Organic glass posts black light-absorbing paper on the steel plate of the other side, is shot convenient for Germicidal efficacy and measuring instrument.
Wherein, it is provided with collecting-tank below downstream flow area water outlet, collecting-tank passes through backwater channel and groundwater reservoir
Connection.Storage water is carried out by groundwater reservoir.
Preferably, the flow regulator is steady water grid；Wherein,
The height of the steady water grid is 55~60cm, width 80cm, thickness 5mm, is set on the steady water grid
It is equipped with of different sizes and spaced apart through-hole, a diameter of 1-1.5cm of big through-hole, small through-hole diameter is 0.25cm.
Preferably, upstream stabilization area is intake using bottom, reduces flow turbulence, while ensureing that water inlet line is in full-section pipe-flow
State meets the use condition of the electromagnetic flowmeter of upstream stabilization area water inlet setting, passes through frequency conversion box control valve aperture
And running frequency, obtain the flow of test requirements document；Using energy dissipating buoy and three layers of steady water grid stationary flow, ensure water flow stationary
Into trial zone.
It is understood that ensureing free discharge after the body of weir, to the drawing type portable weir body Model under different operating modes
Test result is analyzed, and experiment is divided into two parts content, and one to be to maintain hydraulic radius R ' constant, changes flow Q sizes, flow
Gradient is incremented by, and is recorded in water level before gates when ditch water flow is stablized under different flow；Two to be to maintain flow Q constant, passes through change
Pull Board position adjusts aperture, is recorded in water level before gates when ditch water flow is stablized under different opening.
It is adjusted to flow coefficient C for verification pull platedLarger impact is had no, under pull plate standard-sized sheet operating mode, passes through change
Two variables Q, R ', measure corresponding water level before gates H0, and by the way that flow coefficient C is calculatedd.It is learnt by Fig. 3, flow coefficient Cd
Value variation it is little, fluctuated about 0.27, change pull Board position, the improved model based on hydraulic radius calculates different water
The corresponding flow coefficient C of power radius valued, learnt by Fig. 4, flow coefficient CdStill close to 0.27, therefore draft in this size and flow model
Enclose interior flow coefficient CdFor a fixed value 0.27.Flow is calculated according to formula to be compared with the flow of actual measurement, flow when calculating
Coefficient CdUsing 0.27, comparison between calculation results and test observation, verification using formula can accurate measurement water, and can control
Canal capacity, the flow coefficient C measured in pull plate standard-sized sheetd, can apply under the operating mode of different pull plate apertures, flow
Coefficient CdIt is unaffected, it can ensure the precision of flow rate calculation, this drawing type portable weir body is in irrigated area final stage channel
Certain foundation is provided in practical application.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of drawing type portable weir body, which is characterized in that including：Weir plate, water fender and pull plate；
Wherein, the weir plate includes the first weir plate arranged vertically, the second weir plate arranged vertically, horizontally disposed third weir plate
And the 4th weir plate of vertical arrangement, first weir plate and second weir plate are vertically connected at the upper table of the third weir plate
Face, the 4th weir plate are vertically connected at the lower surface of the third weir plate, and first weir plate is parallel with second weir plate
Arrangement, the third weir plate are provided centrally with first through hole；
The water fender is set between first weir plate and second weir plate, and the height of the water fender is adjustable；
The pull plate is located at the lower surface of the third weir plate, the pull plate and third weir plate parallel arrangement, described
Distance is adjustable between pull plate and the 4th weir plate.
2. drawing type portable weir body according to claim 1, which is characterized in that first weir plate, described second
The length of weir plate, the third weir plate and the 4th weir plate is identical, first weir plate, second weir plate and described
The height of 4th weir plate is identical.
3. drawing type portable weir body according to claim 2, which is characterized in that the length of the water fender and described
The length of first weir plate is identical.
4. drawing type portable weir body according to claim 3, which is characterized in that the length of the pull plate with it is described
The length of first weir plate is identical.
5. drawing type portable weir body according to claim 1, which is characterized in that the two of third weir plate lower surface
Side is both provided with sliding slot, and the pull plate is arranged on the sliding slot；
Wherein, the pull plate is slided by the sliding slot, to adjust between the pull plate and the 4th weir plate
Distance.
6. drawing type portable weir body according to claim 1, which is characterized in that the both sides of the water fender are respectively provided with
There is the second through-hole, passes through second through-hole to adjust the height of the water fender by bolt.
7. drawing type portable weir body according to claim 1, which is characterized in that the cross section of the first through hole is
Round or rectangle.
8. a kind of flow-measuring method based on claim 1 to 7 any one of them drawing type portable weir body, feature
It is, including：
Upstream water level based on discharge coefficient, the hydraulic radius of drawing type portable weir body and drawing type portable weir body
Obtain flow parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209992.7A CN108534846B (en) | 2018-03-14 | 2018-03-14 | A kind of drawing type portable weir body and flow-measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810209992.7A CN108534846B (en) | 2018-03-14 | 2018-03-14 | A kind of drawing type portable weir body and flow-measuring method |
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| Publication Number | Publication Date |
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| CN108534846A true CN108534846A (en) | 2018-09-14 |
| CN108534846B CN108534846B (en) | 2019-08-16 |
Family
ID=63484095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810209992.7A Active CN108534846B (en) | 2018-03-14 | 2018-03-14 | A kind of drawing type portable weir body and flow-measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537537A (en) * | 2018-11-30 | 2019-03-29 | 河北海王水工机械有限公司 | A kind of measurement water method and device thereof |
| CN117606568A (en) * | 2023-12-07 | 2024-02-27 | 武汉大水云科技有限公司 | Real-time flow measuring method and system for water outlet |
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| JP2004184368A (en) * | 2002-12-06 | 2004-07-02 | Toshiba Corp | Weir type flow meter |
| CN201678988U (en) * | 2010-05-12 | 2010-12-22 | 武汉大学 | Measuring weir with variable elevation of weir crest |
| CN203772342U (en) * | 2014-01-25 | 2014-08-13 | 义马煤业集团股份有限公司 | Movable mine rectangular weir plate with contracted flow |
| CN205898208U (en) * | 2016-04-29 | 2017-01-18 | 江西省灌溉试验中心站 | Water gaging V -notch weir device with adjustable |
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|---|---|---|---|---|
| CN2040506U (en) * | 1988-01-26 | 1989-07-05 | 李玉清 | Adjustable measuring weir |
| JP2004184368A (en) * | 2002-12-06 | 2004-07-02 | Toshiba Corp | Weir type flow meter |
| CN201678988U (en) * | 2010-05-12 | 2010-12-22 | 武汉大学 | Measuring weir with variable elevation of weir crest |
| CN203772342U (en) * | 2014-01-25 | 2014-08-13 | 义马煤业集团股份有限公司 | Movable mine rectangular weir plate with contracted flow |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537537A (en) * | 2018-11-30 | 2019-03-29 | 河北海王水工机械有限公司 | A kind of measurement water method and device thereof |
| CN117606568A (en) * | 2023-12-07 | 2024-02-27 | 武汉大水云科技有限公司 | Real-time flow measuring method and system for water outlet |
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| Publication number | Publication date |
|---|---|
| CN108534846B (en) | 2019-08-16 |
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