CN107063367A - A kind of bend current surveying device and flow measurement method - Google Patents
A kind of bend current surveying device and flow measurement method Download PDFInfo
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- CN107063367A CN107063367A CN201710381398.1A CN201710381398A CN107063367A CN 107063367 A CN107063367 A CN 107063367A CN 201710381398 A CN201710381398 A CN 201710381398A CN 107063367 A CN107063367 A CN 107063367A
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- flow channels
- flow
- elevation
- downflow weir
- bend
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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
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
-
- 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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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Acoustics & Sound (AREA)
- Thermal Sciences (AREA)
Abstract
The present invention relates to a kind of bend current surveying device, it is characterised in that：The device is in bend（10）The port of export at be provided with bedding（1）, in bedding（1）Downstream be communicated with ditch（7）, bottom plate is provided with the design altitude of measuring section（8）, in bottom plate（8）It is provided with training wall（4）And water conservancy diversion abutment wall（9）, form the first flow channels（11）, the second flow channels（12）And the 3rd flow channels（13）, and the first downflow weir is set respectively（5）, the second downflow weir（14）And the 3rd downflow weir（15）, each downflow weir is still further below provided with downstream apron（6）, described bottom plate（8）Elevation is different in different flow channels, in each flow channels under it, provided with ultrasonic water level gauge（2）, the water level of each flow channels is measured respectively.The present apparatus can accurately be measured in low discharge, and not influence the conveyance capacity of the cross-section of river, and method is simple and reliable, and precision is especially high during Small flowrate measurement.
Description
Technical field
The invention belongs to hydraulic engineering technical field, it is related to a kind of bend current surveying device and method, is mainly used in water conservancy row
In terms of industry bend flow measurement, flow luffing very big bend flow measurement is particularly applied to, water flow can be accurately measured.
Background technology
On hydraulics, it is always a problem that bend flow measurement is carried out exactly.So-called bend, is not the pipe of bending
Road, and refer to natural river course, the bending section of artificial canal.Although forefathers have carried out more research in this respect, big portion
Divide and rest on experiment, trial period, be very applied to less in Practical Project, this is due to be limited by strict boundary condition, institute
The flow of measurement is inaccurate.But in some cases, it is desirable to the accurate measurement flow in the case where bend goes out stream, be simultaneously
Include the flow of very big flow and very little, such as reservoir spillway flow when overflowing flood is very big, but is supplied being irrigated, being met an urgent need
When water, ecological water supplement, flow very little, and at this moment need to carry out accurately measuring flow, in order to meterage, assess and mend
Water effect etc..Solution of Flow in Curved Channel state is complicated, it may appear that transverse gradient occurs in cross-sectional secondary flow, the section depth of water；Under torrent fluidised form also
Shock wave occurs, fluidised form is more unstable.And velocity field is unstable, this has resulted in the difficulty of accurate measurement flow,
Simultaneously because width of flow section is very big in the case of these, depth of water very little during low discharge, the role of viscous force can not be by
Ignore, it is more difficult to accurately measured.During the planning arrangement of many reservoirs, due to being limited by landform, bank is usually arranged to
Side formula spillway, current return main stem, necessarily form Solution of Flow in Curved Channel after being let out under.
The content of the invention
It is an object of the present invention to invent a kind of to realize the apparatus and method of Solution of Flow in Curved Channel flow measurement.Realize the purpose
The technical scheme used is such：A kind of bend current surveying device, it is characterised in that：The device is at the port of export of bend 10
Provided with bedding, the effect of bedding is river bottom protection erosion control, maintains section configuration, ditch is communicated with the downstream of bedding, compared with low discharge
When by water concentrate conflux.It is measuring section in the downstream of connection ditch, bottom plate is provided with the design altitude of measuring section, is set on bottom plate
There are training wall and water conservancy diversion abutment wall, form the first flow channels, the second flow channels and the 3rd flow channels, if flow is big, water channel
Width, can be set multiple flow channels.Downflow weir is set respectively in the end of flow channels, with respect to the first flow channels, the second mistake
Circulation road and the 3rd flow channels set the first downflow weir, the second downflow weir and the 3rd downflow weir, overflow elevation of weir crest root respectively
Determined according to measuring structure the Hydraulic Design；Each downflow weir is provided with downstream apron still further below, to prevent current scour.Described bottom plate
Elevation is different in different flow channels, as illustrated, the floor elevation of the second flow channels and the bottom elevation phase for connecting ditch
Together, the elevation of weir crest in the flow channels is also below other weirs；The floor elevation of first flow channels and the 3rd flow channels and
The ditch crest level for connecting ditch is identical.Described downflow weir elevation in different flow channels is different, the elevation of the second downflow weir
Less than the first downflow weir and the elevation of the 3rd downflow weir.In the front end of training wall and water conservancy diversion abutment wall, service bridge is set, under it
Each flow channels in, provided with ultrasonic water level gauge（Can also be the water-level gauge of other forms,）In order to which monitoring is each in real time
The water level of individual flow channels.
The flow measurement method of the present invention is as follows：
A kind of bend flow measurement method, is discharged water according to management and running scheme, and current enter after bend, by bedding, enter first
Enter into connection ditch, then into the second low flow channels of floor elevation, by the second low downflow weir of elevation of weir crest
Outflow, is entered in downstream river course by downstream apron.If flow is smaller, all water pass through the second flow channels；With stream
The increasing of amount, water level rises, and higher than the floor elevation of the first flow channels, the 3rd flow channels, other each flow channels start
Water is crossed, the stable level formed in the presence of wall and water conservancy diversion abutment wall is led in steady flow, flow channels, due to the work of bend stream
With the water level in each flow channels is differed, and ultrasonic water level gauge is started working, and the water level in each passage is measured in real time
And excessively stream flow is calculated, it is cumulative to can obtain whole flow.
The present invention is in the exit of bend（If condition is suitable, entrance can also）The training wall for setting multiple tracks parallel, shape
Into porous flow channels.Connection ditch is set in the front end of training wall, set in the end of training wall in the range of downflow weir, training wall
The flow section parameter such as key element such as section configuration, roughness do not changed along journey.There is the floor elevation of a flow channels centre
It is equal with the bottom elevation for connecting ditch less than other flow channels, the floor elevation of other flow channels and the side slope top for connecting ditch
Elevation is identical.Operationally, the current of bend outflow are separated, and are entered in training wall, the length of training wall wants long enough,
More than 3~5 times of the maximum sectional water depth, the water for going out stream the purpose is to bend is entered in training wall, in the constraint of training wall
Under, current are gradually smoothed out, and form steady flow, pass through downflow weir.Water-level gauge is installed in the position smoothed out in current, measures water on weir
Head, weir head and flow have stable dependency relation, can carry out calculating by formula and obtain flow.
When flow-rate ratio is less, it is first into after Solution of Flow in Curved Channel outflow bend in connection ditch, is then flowed to height
In the low flow channels of journey, because current are concentrated, there is the enough depth of water, can be with accurately measure water level, so as to calculate stream
Amount.For reduction cost, due to training wall stress very little, thin-wall construction can be used；Service bridge is provided with training wall, in order to
Measure work and the traffic of two sides.
The present invention can not only carry out the measurement of flow in big flow, can also accurately be measured in low discharge, and not
Influence the conveyance capacity of the cross-section of river；Method is simple and reliable, and precision is especially high during Small flowrate measurement.
Brief description of the drawings：
Fig. 1 is structural plan figure of the present invention；
Fig. 2 is structure B-B profiles of the present invention；
Fig. 3 is A-A profiles of structure of the present invention；
Fig. 4 is the front view of structure of the present invention.
In figure, 1, bedding；2nd, ultrasonic water level gauge；3rd, service bridge；4th, training wall；5th, the first downflow weir；6th, downstream is protected
It is smooth；7th, ditch is connected；8th, bottom plate；9th, water conservancy diversion abutment wall；10th, bend, the 11, first flow channels, the 12, second flow channels, the 13, the 3rd
Flow channels, the 14, second downflow weir, the 15, the 3rd downflow weir.
Embodiment：
Referring to the drawings, a kind of bend current surveying device, it is characterised in that：The device is provided with bedding 1, paving at the port of export of bend 10
The effect of lid 1 is river bottom protection erosion control, maintains section configuration, ditch 7 is communicated with the downstream of bedding 1, by water collection when compared with low discharge
In conflux.It is measuring section in the downstream of connection ditch 7, bottom plate 8 is provided with the design altitude of measuring section, is provided with and leads on bottom plate 8
Wall 4 and water conservancy diversion abutment wall 9 are flowed, the first flow channels 11, the second flow channels 12 and the 3rd flow channels 13 are formed, if flow is big,
Water channel is wide, and many flow channels can be set.Downflow weir is set respectively in the end of flow channels, with respect to the first flow channels 11,
Two flow channels 12 and the 3rd flow channels 13 set the first downflow weir 5, the second downflow weir 14 and the 3rd downflow weir 15 respectively, overflow
Elevation of weir crest is flowed to be determined according to measuring structure the Hydraulic Design；Each downflow weir is provided with downstream apron 6 still further below, to prevent Shui Liuchong
Brush.Described bottom plate 8 elevation in different flow channels is different, as illustrated, the floor elevation of the second flow channels 12 and
The bottom elevation for connecting ditch 7 is identical, and the elevation of weir crest in the flow channels is also below other weirs；First flow channels 11 and the 3rd mistake
The floor elevation of circulation road 13 is identical with the ditch crest level for connecting ditch 7.Described downflow weir elevation in different flow channels
Difference, the elevation of the second downflow weir 14 is less than the first downflow weir 5 and the elevation of the 3rd downflow weir 15.In training wall 4 and diversion edges
The front end of wall 9, is set in service bridge 3, each flow channels under it, provided with ultrasonic water level gauge 2（Can also be other shapes
The water-level gauge of formula,）In order to monitor the water level of each flow channels in real time.
The flow measurement method of the present invention is as follows：
A kind of bend flow measurement method, is discharged water according to management and running scheme, and current enter after bend 10, by bedding 1, first
Be introduced into connection ditch 7, then into the second low flow channels 12 of floor elevation, by elevation of weir crest it is low second
Downflow weir 14 flows out, and is entered by downstream apron 6 in downstream river course.If flow is smaller, all water are crossed by second and circulated
Road 12；With the increasing of flow, water level rises, risen higher than the downflow weir in the first flow channels 11, the 3rd flow channels 13
Journey, other each flow channels started water, the water formed in the presence of wall 4 and water conservancy diversion abutment wall 9 is led in steady flow, flow channels
Position is stable, and due to the effect of bend stream, the water level in each flow channels is differed, and ultrasonic water level gauge 2 is started working, real
When measure the water level in each passage and calculate excessively stream flow, it is cumulative to can obtain whole flow.
Because the current in flow channels are stable smooth-goings, water level is also maintenance level, so the result of measurement
It is accurate.In low discharge, current are concentrated, and the depth of water is big, water level can also be accurately measured, so as to measure accurate flow.
Claims (3)
1. a kind of bend current surveying device, it is characterised in that：The device is in bend（10）The port of export at be provided with bedding（1）, in paving
Lid（1）Downstream be communicated with ditch（7）, in connection ditch（7）Downstream be measuring section, on the design altitude of measuring section be provided with bottom
Plate（8）, in bottom plate（8）It is provided with training wall（4）And water conservancy diversion abutment wall（9）, form the first flow channels（11）, the second flow channels
（12）And the 3rd flow channels（13）, downflow weir is set respectively in the end of flow channels, with respect to the first flow channels（11）,
Two flow channels（12）And the 3rd flow channels（13）First downflow weir is set respectively（5）, the second downflow weir（14）And the 3rd overflow
Flow weir（15）, each downflow weir is still further below provided with downstream apron（6）, described bottom plate（8）Elevation is not in different flow channels
Together, the second flow channels（12）Floor elevation with connect ditch（7）Bottom elevation it is identical, the second flow channels（12）Weir crest it is high
Journey is also below other weirs；First flow channels（11）With the 3rd flow channels（13）Floor elevation with connect ditch（7）Ditch top
Elevation is identical, and the described downflow weir elevation in different flow channels is different, the second downflow weir（14）Elevation be less than first
Downflow weir（5）With the 3rd downflow weir（15）Elevation, in training wall（4）And water conservancy diversion abutment wall（9）Front end, set service bridge
（3）, in each flow channels under it, provided with ultrasonic water level gauge（2）, the water level of each flow channels is measured respectively.
2. according to the bend current surveying device described in claim 1, it is characterised in that：Described flow channels set multiple, its bottom
Plate elevation is different with overflow elevation of weir crest.
3. a kind of bend flow measurement method, it is characterised in that：The flow measurement method is discharged water according to management and running scheme, and current enter
Bend（10）Afterwards, by bedding（1）, it is first into connection ditch（7）In, then into the second low circulation excessively of floor elevation
Road（12）In, by the second low downflow weir of elevation of weir crest（14）Outflow, passes through downstream apron（6）Enter in downstream river course,
If flow is smaller, all water pass through the second flow channels（12）；With the increasing of flow, water level rises, higher than the first excessively stream
Passage（11）, the 3rd flow channels（13）Interior overflow elevation of weir crest, other each flow channels started water, were leading wall（4）And
Water conservancy diversion abutment wall（9）In the presence of form the stable level in steady flow, flow channels, due to the effect of bend stream, each cross is circulated
Water level in road is differed, ultrasonic water level gauge（2）Start working, the water level in each passage is measured in real time and was calculated
Flow is flowed, it is cumulative to can obtain whole flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710381398.1A CN107063367B (en) | 2017-05-25 | 2017-05-25 | Curve flow measurement device and flow measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710381398.1A CN107063367B (en) | 2017-05-25 | 2017-05-25 | Curve flow measurement device and flow measurement method |
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| Publication Number | Publication Date |
|---|---|
| CN107063367A true CN107063367A (en) | 2017-08-18 |
| CN107063367B CN107063367B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710381398.1A Active CN107063367B (en) | 2017-05-25 | 2017-05-25 | Curve flow measurement device and flow measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643111A (en) * | 2017-10-11 | 2018-01-30 | 贵州省水利水电勘测设计研究院 | A kind of low discharge monitors weir flow measurement structure |
| CN112504357A (en) * | 2020-11-26 | 2021-03-16 | 黄河勘测规划设计研究院有限公司 | Dynamic analysis method and system for river channel flow capacity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202141477U (en) * | 2011-05-06 | 2012-02-08 | 中国科学院地理科学与资源研究所 | Small-watershed fully-automatic three-level flow measuring device |
| CN205100180U (en) * | 2015-11-05 | 2016-03-23 | 中国电建集团华东勘测设计研究院有限公司 | Groove section bend structure is let out to spillway |
| JP6047738B1 (en) * | 2016-08-16 | 2016-12-21 | 有限会社北沢技術事務所 | Open channel flow measuring device |
| CN106638501A (en) * | 2016-09-09 | 2017-05-10 | 四川大学 | Water-sand separation building arrangement form suitable for curve chute spillway |
| CN206787634U (en) * | 2017-05-25 | 2017-12-22 | 山东省水利科学研究院 | A kind of bend current surveying device |
-
2017
- 2017-05-25 CN CN201710381398.1A patent/CN107063367B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202141477U (en) * | 2011-05-06 | 2012-02-08 | 中国科学院地理科学与资源研究所 | Small-watershed fully-automatic three-level flow measuring device |
| CN205100180U (en) * | 2015-11-05 | 2016-03-23 | 中国电建集团华东勘测设计研究院有限公司 | Groove section bend structure is let out to spillway |
| JP6047738B1 (en) * | 2016-08-16 | 2016-12-21 | 有限会社北沢技術事務所 | Open channel flow measuring device |
| CN106638501A (en) * | 2016-09-09 | 2017-05-10 | 四川大学 | Water-sand separation building arrangement form suitable for curve chute spillway |
| CN206787634U (en) * | 2017-05-25 | 2017-12-22 | 山东省水利科学研究院 | A kind of bend current surveying device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643111A (en) * | 2017-10-11 | 2018-01-30 | 贵州省水利水电勘测设计研究院 | A kind of low discharge monitors weir flow measurement structure |
| CN112504357A (en) * | 2020-11-26 | 2021-03-16 | 黄河勘测规划设计研究院有限公司 | Dynamic analysis method and system for river channel flow capacity |
| CN112504357B (en) * | 2020-11-26 | 2023-01-24 | 黄河勘测规划设计研究院有限公司 | Method and system for dynamically analyzing river channel overflowing capacity |
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| CN107063367B (en) | 2023-05-23 |
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