CN209014061U - A kind of water flow real-time online long-range survey system - Google Patents
A kind of water flow real-time online long-range survey system Download PDFInfo
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- CN209014061U CN209014061U CN201821653567.9U CN201821653567U CN209014061U CN 209014061 U CN209014061 U CN 209014061U CN 201821653567 U CN201821653567 U CN 201821653567U CN 209014061 U CN209014061 U CN 209014061U
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Abstract
The utility model provides a kind of water flow real-time online long-range survey system, comprising: metering weir is mounted on the flow measuring section of water body to be measured；Pressure type water gauge is mounted on metering weir, is acquired waterlevel data and is transferred to GPRS wireless network, and waterlevel data is simultaneously transmitted to data processing centre by Internet network by GPRS wireless network connection Internet network；Data acquisition module is mounted on pressure type water gauge, acquires waterlevel data；Data transmission blocks communicate to connect with data acquisition module, measured waterlevel data are transmitted to data receiver platform at times, using GPRS wireless telecommunications；Data receiver platform sends Platform communication with data and connect, and receives waterlevel data, and data receiver platform uses fixed ip address；Data processing centre connect with data receiver Platform communication, and data processing centre carries out analysis storage to received data and information output aggregates data on flows from data receiver platform downloading data, and add up data on flows at times, obtains total flow data.
Description
Technical field
The utility model relates to water flow real-time online remote measuring units, belong to hydrologic monitoring technical field, especially
It is related to a kind of flow system suitable for natural river, Artifical Canal, discharge outlet etc. without pressure, gravity fluidised form.
Background technique
Drive of 20th century with fields such as energy measurement, environmental protection, communications and transportation to flow measurement, so that flowmeter
It is rapidly developed, the new technologies such as ultrasonic wave, sharp optical, electromagnetic, nuclear technology and microcomputer enter flow measurement field, make
The big great development of flow measurement technology, the especially rapid development of microelectric technique are obtained, is provided respectively for the manufacturing technology of flowmeter
The heart-shaped component of kind has further pushed flowmeter from mechanically to intelligent, modular development.The development of flowmeter will be to
The reliability of flowmeter is improved, adaptability of the flowmeter to medium and the adaptability to environment etc. is improved and develops, while with
The application of new signal processing technology and new signal transmission technology, flowmeter will develop to height intelligent direction.
Nearly one over 100 years, and water conservancy working person has carried out a large amount of research, including following several method to open channel measurement method:
(1) velocity-area method: by measuring flow velocity and the area of rivers and canals section come flow measurement, foundation is that flow is equal to
The integral of flow velocity on a certain cross-section of river, this method are used for the interim flow measurement of locality and time.
(2) gradient-water conservancy radius-area-method: this method is the method that open-channel constant uniform flow seeks flow, and this method is used for
In the constant long right prism body channel of channel base slope, channel is necessary for along slope, and without the factor of any change resistance to water-flow,
Calculation formula is Chezy formula and Manning formula, or relies on the mathematical formulae with open-channel flow velocity distribution.
(3) dilution method.This method flow measurement is the salting liquid using proper proportion, and the entrance that equivalent injects measured rivers and canals is disconnected
At face, and in the concentration of a certain section survey chemical salt in downstream, channel inject solution chemical salt concentration and downstream section
The flow of water flow in channel can be obtained multiplied by chemical salt solutions injection rate for the ratio between concentration of chemical salt, it is desirable that the turbulent fluctuation journey of water flow
Degree is high, claims in mountain stream and flood.
In recent years, Water ecoenvironment consciousness is continuously increased with people, city river, municipal sewage is arranged
Put, the demand of rural sewage treatment, farmland irrigation water and other water administration water resources etc. water quantity monitoring surges, water is surveyed
The accuracy of amount highlights, and accurate metering water quantity, and the selection of measure of water method is most important.Currently, widely used stream
Amount metering method mainly has ultrasonic flowmeter, and electromagnetic flowmeter, intellectual water meter, water-level gauge is with the methods of total amount weir notch.
However, the method for carrying out flow measurement using ultrasonic flowmeter, ultrasonic flowmeter used not only instrument sheet
Body is expensive, and later period operation and maintenance are also at high cost, requires the technical level of operator also high.Electromagnetic flowmeter, intelligence
Energy water meter measurement accuracy when there is pressure water flow is higher, and accuracy is relatively low when measurement is without pressure, gravity fluidised form water body.It utilizes
Water-level gauge measures the method accuracy height without pressure, gravity fluidised form water flow with total amount weir notch, but water-level gauge is mostly Self-memory
Mode needs scene to transfer, cannot intuitively, timely obtain data, the furthermore flow ga ge relation of this measuring structure method
If becoming the executable program of computer after cannot deriving in advance, flow measurement work will take a lot of work, is time-consuming,
It being capable of intuitive, timely, accurate water consumption measurement system therefore, it is necessary to be related to one kind.
Summary of the invention
In order to overcome the problems, such as structure of the existing technology, it is remote that the utility model provides a kind of water flow real-time online
Journey measuring system, inventive concept are: the installation metering weir in open channel utilizes the water of pressure type water gauge measurement specified position
Position, according to the flow and water level for flowing through weir notch in single valued relation, according to corresponding flow formula or rule-of-thumb relation, by what is measured
Water level value is converted into the flow for flowing through weir notch, combines mensuration mode using telemetering type open channel flow rate monitoring system and metering weir,
By wireless transmission by the data real-time transmission of acquisition to monitoring center, it is responsible for carrying out daily mass data by special messenger whole
The processing such as reason, analysis, calculating, statistics.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of water flow real-time online long-range survey system, comprising:
Weir is measured, the flow measuring section of water body to be measured is mounted on；
Pressure type water gauge is mounted on metering weir, is acquired water body waterlevel data and is transferred to GPRS wireless network, described
The waterlevel data of water body is simultaneously transmitted to Data processing by Internet network by GPRS wireless network connection Internet network
The heart；
Data acquisition module is mounted on the pressure type water gauge, acquires the waterlevel data of water body；
Data transmission blocks are communicated to connect with the data acquisition module, and data transmission blocks are at times by measured water
Position data are transmitted to data receiver platform, and the data transmission blocks use GPRS wireless telecommunications；
Data receiver platform sends Platform communication with the data and connect, receives waterlevel data, the data receiver platform
Using fixed ip address；
Data processing centre connect with the data receiver Platform communication, and data processing centre is under data receiver platform
Data are carried, analysis storage is carried out to received data and information exports, and aggregates data on flows, add up flow at times
Data obtain total flow data to realize that water flow real-time online remotely monitors.
Preferably, the metering weir is triangular gap sharp-crested weir, and the cross-section of river is triangular gap, and angle top downwards, is pushed up
Angle is 45 degree or 90 degree.
Preferably, the metering weir is rectangle thin-wall weir, including rectangular notch sharp-crested weir and wide rectangle thin-wall weir.
Preferably, the rectangular notch sharp-crested weir includes the communicating pipe connecting with stilling well and tapping pipe, the rectangle
The angle of cut on the rectangular notch side of notch sharp-crested weir and bottom edge is 90 degree, and weir plate notch top surface and side are with upstream face with sharp-edged phase
It hands over, rectangular notch perpendicular bisector gool center line close with row is overlapped, and elevation of weir crest is greater than the peak level 0.1m of weir plate downstream gool.
Preferably, the wide rectangle thin-wall weir includes the communicating pipe connecting with stilling well and tapping pipe, described wide
The weir crest of rectangle thin-wall weir is horizontal plane, and crest of weir width and capable nearly gool are of same size, weir plate to upstream water level measuring frequency section it
Between two wall of gool be vertical smooth surface, keep identical along short transverse gool width dimensions at weir plate, gool abutment wall is past
Weir plate downstream development length is greater than 0.3hmax, hmaxIndicate the maximum head value of actual measurement, the weir crest of the wide rectangle thin-wall weir is high
Journey be greater than weir plate downstream gool peak level 0.1m, the straight segment length of the nearly gool of weir plate upstream row be greater than water surface width 10 again with
On, venthole is set on the abutment wall between wide sharp-crested weir overflow root edge and the downstream water surface, to make overflow upper and lower surface always
It is communicated with atmosphere.
Preferably, in the case where the rectangle thin-wall weir that the rectangle thin-wall weir shrinks for no side, 3-5 times of the bank upstream and downstream on weir
Most greater than water gauge is installed at sluice head, under free discharge state, will cross and be painted on water gauge at weir flow amount quarter, the rectangular thin-wall
In the case of weir is the rectangle thin-wall weir for having side to shrink, water level and flow when free discharge are engraved on same scale, and by water gauge
Installation or quarter are painted on side weir plate, to read flow value.
Preferably, the metering weir is flat V-type weir, and weir crest is V-shaped, including stilling well, communicating pipe and gool, from two
The cross fall of side wall to center line is limited to 1:10,1:20 and 1:40, and the section of flat V-type weir is triangle, upstream and downstream
Two slope surfaces and the gradient in sideline are respectively 1:2 (vertical: horizontal) and 1:5 (vertical: level), two slope surfaces of weir crest upstream with
Two slope surfaces in weir crest downstream are from two sides abutment wall to centerline dip, and weir crest intersection is straight line in the plane, and and canal
Groove center line is orthogonal, and water flow is flowed through from V-arrangement crest of weir when small flow, improves flow measurement accuracy, and weir body is mounted in rectangle gool, institute
The vertex for stating V-arrangement crest of weir is expert on nearly gool center line, in the stilling well towards gool communicating pipe tube bottom apart from minimum water
Position should be greater than 0.06m, and the neighbouring gool surface in communicating pipe critical point is smooth, and minimum zone is 10 times for being connected to pipe diameter.
Preferably, the metering weir is steel plate, and with a thickness of 3-5mm, other sizes are according to the size of river, water channel or pipeline
Customization, shape are customized according to the shape of river, water channel or pipeline.
It preferably, further include equipment protecting device, plugging material and remote shooting system, the equipment protecting device packet
Fixed wall is included, metering weir is protected, the plugging material is waterproof material.
It preferably, further include remote equipment and display, the remote equipment is used to carry out by data processing centre
Long-range monitoring, the remote equipment are mobile phone or PC machine, and the display is mounted on the pressure type water gauge and described
At data processing centre, for showing real time water level numerical value and flow number.
The step of carrying out online discharge monitoring using the water flow real-time online long-range survey system are as follows:
1) above equipment metering weir, pressure type water gauge, data acquisition module, data transmission blocks, data receiver are put down
Platform and data processing centre's installation；
2) measured waterlevel data is transmitted to data receiver platform at times by data transmission blocks；
3) data processing centre is from data receiver platform downloading data；
4) waterlevel data is converted into data on flows using mathematical modeling formula corresponding to metering weir；
5) data on flows is aggregated, add up data on flows at times, obtains total flow data.
A kind of online flow monitoring system of the utility model, has merged transmission technology and flow measurement technology, phase
For the prior art, there is following economic and technical effect:
(1) precision and accuracy of water flow measurement are improved；
(2) cost of water flow measurement is reduced；
(3) easy to operate, it is easy.
According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more
Add the above-mentioned and other purposes, advantages and features of clear the utility model.
The brief description of accompanying drawing
Some specific realities of the utility model are described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter
Apply example.Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that
The drawings are not necessarily drawn to scale.The target and feature of the utility model will more in view of following description taken together with the accompanying drawings
Add obviously, in attached drawing:
Attached drawing 1 is the water flow real-time online long-range survey system structural schematic diagram according to the utility model embodiment；
Attached drawing 2 is the structural schematic diagram according to the triangular gap sharp-crested weir of the utility model embodiment；
Attached drawing 3 is the structural schematic diagram according to the rectangular notch sharp-crested weir of the utility model embodiment；
Attached drawing 4 is the structural schematic diagram according to the wide rectangle thin-wall weir of the utility model embodiment；
Attached drawing 5 is the structural schematic diagram according to the flat V-type weir of the utility model embodiment；
Attached drawing 6 is the monitoring process according to the water flow real-time online long-range survey system of the utility model embodiment
Figure.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing, but is not intended to limit this reality
With novel protection scope.
Referring to Fig. 1, a kind of water flow real-time online long-range survey system, comprising: metering weir is mounted on water body to be measured
Flow measuring section；Pressure type water gauge is mounted on metering weir, is acquired water body waterlevel data and is transferred to GPRS wireless network, institute
It states GPRS wireless network connection Internet network and the waterlevel data of water body is transmitted to data processing by Internet network
Center；Data acquisition module is mounted on the pressure type water gauge, acquires the waterlevel data of water body；Data transmission blocks, with
Measured waterlevel data is transmitted to data receiver at times and put down by the data acquisition module communication connection, data transmission blocks
Platform, the data transmission blocks use GPRS wireless telecommunications；Data receiver platform sends Platform communication with the data and connect,
Waterlevel data is received, the data receiver platform uses fixed ip address；Data processing centre, it is logical with the data receiver platform
Letter connection, data processing centre carry out analysis storage to received data and information are shown from data receiver platform downloading data,
And data on flows is aggregated, add up data on flows at times, obtains total flow data to realize that water flow exists in real time
Line remotely monitors.
Referring to fig. 2, metering weir is triangular gap sharp-crested weir, and the cross-section of river is triangular gap, and angle top is downward, top clip angle
It is 45 degree or 90 degree, the relationship of flow and water level are as follows:Wherein in formula: Q is flow, and unit is
m3/s；C is discharge coefficient, and when θ=90 ° are from θ ≠ 90 °, value is different；θ is triangular gap angle, and unit is (°)；heTo have
Effect measurement head, unit m；H is that head, unit m are surveyed in upstream；KhFor head correction factor, unit m, when θ=90 °
When, Kh=0.000085m takes different numerical value when θ ≠ 90 °.
Ginseng is seen figures 3 and 4, and metering weir is rectangle thin-wall weir, including rectangular notch sharp-crested weir and wide rectangle thin-wall weir.
Referring to Fig. 3, rectangular notch sharp-crested weir includes the communicating pipe connecting with stilling well and tapping pipe, the rectangular notch
The rectangular notch side of sharp-crested weir and the angle of cut on bottom edge are 90 degree, and weir plate notch top surface and side are intersected with upstream face with sharp-edged,
Rectangular notch perpendicular bisector gool center line close with row is overlapped, and elevation of weir crest is greater than the peak level 0.1m of weir plate downstream gool, stream
The relationship of amount and water level are as follows:Wherein in formula: be=b+Kb,he=h+Kh, Q is flow, unit m3/
s；C is discharge coefficient, is calculated according to b/B value；beFor effective gap width, unit m；B is upstream gap width, unit
For m；KhFor width correction coefficient, unit m；heFor effective head, unit m；H is that head, unit m are surveyed in upstream；KhFor
Head correction factor, unit m, Kh=0.001m；B is groove width, unit m.
Referring to fig. 4, wide rectangle thin-wall weir includes the communicating pipe connecting with stilling well and tapping pipe, the wide rectangle
The weir crest of sharp-crested weir is horizontal plane, and crest of weir width gool close with row is of same size, and weir plate is between upstream water level measuring frequency section
Two wall of gool is vertical smooth surface, keeps identical along short transverse gool width dimensions at weir plate, and gool abutment wall is toward weir plate
Downstream development length is greater than 0.3hmax, hmaxIndicate the maximum head value of actual measurement, the elevation of weir crest of the wide rectangle thin-wall weir is big
In the peak level 0.1m of weir plate downstream gool, the straight segment length of the nearly gool of weir plate upstream row is greater than 10 times of water surface width or more,
Venthole is set on abutment wall between wide sharp-crested weir overflow root edge and the downstream water surface, to make overflow upper and lower surface always and greatly
Gas phase is logical, the diameter of the venthole are as follows: φ=0.11hb0.5, in formula: φ indicates ventilation bore dia, unit m；In h expression
Trip actual measurement head, unit m；B indicates that weir is wide, unit m；The relationship of flow and water level are as follows:Wherein he
=h+0.0012, in formula: Q is flow, unit m3/s；C is discharge coefficient, C=0.602+0.083h/p；heFor effective head,
Unit is m；H is that head, unit m are surveyed in upstream.
In the case where the rectangle thin-wall weir that rectangle thin-wall weir shrinks for no side, 3-5 times of bank upstream and downstream of the most serious offense weir on weir
Water gauge is installed at head, under free discharge state, will cross and be painted on water gauge at weir flow amount quarter, the rectangle thin-wall weir is there are side receipts
In the case of the rectangle thin-wall weir of contracting, water level is engraved on same scale with flow when free discharge, and water gauge is installed or carved and is drawn
On side weir plate, to read flow value.
Referring to Fig. 5, metering weir is flat V-type weir, and weir crest is V-shaped, including stilling well, communicating pipe and gool, from two sides
The cross fall of abutment wall to center line is limited to 1:10,1:20 and 1:40, and the section of flat V-type weir is triangle, upstream and downstream two
A slope surface is respectively 1:2 (vertical: horizontal) and 1:5 (vertical: horizontal), two slope surfaces of weir crest upstream and weir with the gradient in sideline
Two slope surfaces in downstream are pushed up from two sides abutment wall to centerline dip, weir crest intersection is straight line in the plane, and and gool
Center line is orthogonal, and water flow is flowed through from V-arrangement crest of weir when small flow, improves flow measurement accuracy, and weir body is mounted in rectangle gool, flow
With the relationship of water level are as follows:Wherein he=h-Kh, in formula: Q is flow, unit m3/s；C is stream
Coefficient of discharge；heFor effective head, unit m；H is that head, unit m, K are surveyed in upstreamhFor head correction factor, ZhFor shape
Coefficient, as h≤h ', Zh=1.0, as h > h ',Wherein h ' is V-arrangement crest of weir height, i.e., weir crest is most
High and lowest elevation difference, h '=b/2m, m are V-arrangement weir crest line cross fall coefficient, CvFor efflux coefficient, b is weir body width,
Unit is m, and the vertex of the V-arrangement crest of weir is expert on nearly gool center line, and the communicating pipe tube bottom of gool is led in the stilling well
It should be greater than 0.06m apart from lowest water level, the neighbouring gool surface in communicating pipe critical point is smooth, and minimum zone is be connected to pipe diameter 10
Times.
Metering weir is steel plate, and with a thickness of 3-5mm, other sizes are customized according to the size of river, water channel or pipeline, shape root
It is customized according to the shape of river, water channel or pipeline.
Equipment protecting device, plugging material and remote shooting system can also be set, and equipment protecting device includes fixing
Wall protects metering weir, and plugging material is waterproof material.Remote equipment and display can also be set certainly, remotely
For equipment for remotely being monitored by data processing centre, remote equipment is mobile phone or PC machine, and display is mounted on pressure type
On water-level gauge and at data processing centre, for showing real time water level numerical value and flow number.
The utility model embodiment is applied to Beijing sewage draining exit, and drainage pipeline diameter 0.8m discharges sanitary sewage, uses
This system measuring flow, can intuitively, timely understand one for 24 hours in each integral point timesharing water data and cumulative timesharing
The total flow of sewage draining exit discharge quantity after section data on flows.In the present embodiment, remotely surveyed using the water flow real-time online
Amount system carries out the step of online discharge monitoring are as follows:
1) site inspection sewage draining exit；
2) monitoring scheme is determined；
3) it designs, prepare metering weir and telemetering type open channel flow rate meter systems；
4) it installs, debug metering weir notch, teletransmission open channel flow rate meter systems and equipment protecting device；
5) each sewage draining exit founding mathematical models and database；
6) daily to receive, arrange data, it calculates real-time traffic, daily amount and draws emission equivalent curve graph；
7) periodical inspection, maintenance, correction detection system；
8) summarize daily, submit the monthly report of sewage draining exit,
It is primary with 0.5h or 1h that the acquisition data frequency is detected to sewage draining exit；Rainfall-runoff process is especially monitored to inlet for stom water
When entering river flow, the acquisition data frequency is primary with 5min or 10min.As a result it is detailed in following table.
* * instantaneous flow and time changing curve figure
Time
It is verified, measurement error≤1mm of water level on weir.Flow measurement precision is ± 1.00%, and measurement effect is good, more
It is intelligent.
Technical solution provided by the utility model embodiment is described in detail above, it is used herein specifically
A example is expounded the principle and embodiment of the utility model embodiment, and the explanation of above embodiments is only applicable to help
Assistant solves the principle of the utility model embodiment；Those of ordinary skill in the art simultaneously, embodiment according to the present utility model,
There will be changes in terms of specific embodiments and scope of application, in conclusion the content of the present specification should not be construed as pair
The limitation of the utility model.
Claims (9)
1. a kind of water flow real-time online long-range survey system, characterized by comprising:
Weir is measured, the flow measuring section of water body to be measured is mounted on；
Pressure type water gauge is mounted on metering weir, and acquisition water body waterlevel data is simultaneously transferred to GPRS wireless network, the GPRS without
The waterlevel data of water body is simultaneously transmitted to data processing centre by Internet network by gauze connection Internet network；
Data acquisition module is mounted on the pressure type water gauge, acquires the waterlevel data of water body；
Data transmission blocks are communicated to connect with the data acquisition module, and data transmission blocks are at times by measured water level number
According to data receiver platform is transmitted to, the data transmission blocks use GPRS wireless telecommunications；
Data receiver platform sends Platform communication with the data and connect, and receives waterlevel data, and the data receiver platform uses
Fixed ip address；
Data processing centre connect with the data receiver Platform communication, and data processing centre downloads number from data receiver platform
According to, analysis storage is carried out to received data and information exports, and aggregates data on flows, cumulative flow number at times
According to acquisition total flow data are to realize that water flow real-time online remotely monitors；
Remote equipment and display, the remote equipment are described long-range for remotely being monitored by data processing centre
Equipment is mobile phone or PC machine, and the display is mounted on the pressure type water gauge and at the data processing centre, is used
In display real time water level numerical value and flow number.
2. a kind of water flow real-time online long-range survey system according to claim 1, it is characterised in that: the metering
Weir is triangular gap sharp-crested weir, and the cross-section of river is triangular gap, and downwards, top clip angle is 45 degree or 90 degree on angle top.
3. a kind of water flow real-time online long-range survey system according to claim 1, it is characterised in that: the metering
Weir is rectangle thin-wall weir, including rectangular notch sharp-crested weir and wide rectangle thin-wall weir.
4. a kind of water flow real-time online long-range survey system according to claim 3, it is characterised in that: the rectangle
Notch sharp-crested weir includes the communicating pipe connecting with stilling well and tapping pipe, the rectangular notch side of the rectangular notch sharp-crested weir
The angle of cut with bottom edge is 90 degree, and weir plate notch top surface and side are intersected with upstream face with sharp-edged, and rectangular notch perpendicular bisector and row are close
Gool center line is overlapped, and elevation of weir crest is greater than the peak level 0.1m of weir plate downstream gool.
5. a kind of water flow real-time online long-range survey system according to claim 3, it is characterised in that: described wide
Rectangle thin-wall weir includes the communicating pipe connecting with stilling well and tapping pipe, and the weir crest of the wide rectangle thin-wall weir is level
Face, crest of weir width gool close with row is of same size, and weir plate to two wall of gool between upstream water level measuring frequency section is vertical light
Sliding surface keeps identical along short transverse gool width dimensions at weir plate, and gool abutment wall is greater than toward weir plate downstream development length
0.3hmax, hmaxIndicate the maximum head value of actual measurement, the elevation of weir crest of the wide rectangle thin-wall weir is greater than weir plate downstream gool
Peak level 0.1m, the straight segment length of the nearly gool of weir plate upstream row are greater than 10 times of water surface width or more, wide sharp-crested weir overflow bottom
Venthole is set on abutment wall between edge and the downstream water surface, so that overflow upper and lower surface be made to communicate always with atmosphere.
6. according to a kind of water flow real-time online long-range survey system as claimed in claim 3 to 5, it is characterised in that: institute
In the case where stating the rectangle thin-wall weir that rectangle thin-wall weir shrinks for no side, at 3-5 times of weir bank upstream and downstream most greater than at sluice head
Water gauge is installed, under free discharge state, will cross and be painted on water gauge at weir flow amount quarter, the rectangle thin-wall weir is the square for having side to shrink
In the case of shape sharp-crested weir, water level is engraved on same scale with flow when free discharge, and water gauge is installed or carved and is painted on side
On weir plate, to read flow value.
7. a kind of water flow real-time online long-range survey system according to claim 1, it is characterised in that: the metering
Weir is flat V-type weir, and weir crest is V-shaped, including stilling well, communicating pipe and gool, from two sides abutment wall to the cross fall of center line
Degree is limited to 1:10 or 1:20 or 1:40, and the section of flat V-type weir is triangle, the gradient difference of two slope surfaces of upstream and downstream and sideline
Be vertical: level is 1:2 or 1:5, and two slope surfaces of weir crest upstream and two slope surfaces in weir crest downstream are from two sides abutment wall in
The inclination of heart line, weir crest intersection is straight line in the plane, and orthogonal with gool center line, and water flow is from V-arrangement crest of weir when small flow
It flowing through, improves flow measurement accuracy, weir body is mounted in rectangle gool, and the vertex of the V-arrangement crest of weir is expert on nearly gool center line,
Communicating pipe tube bottom in the stilling well towards gool apart from lowest water level should be greater than 0.06m, the neighbouring gool table in communicating pipe critical point
Face is smooth, and minimum zone is 10 times for being connected to pipe diameter.
8. a kind of -5 and 7 any water flow real-time online long-range survey system, feature exist according to claim 1
In: the metering weir is steel plate, and with a thickness of 3-5mm, other sizes are customized according to the size of river, water channel or pipeline, shape root
It is customized according to the shape of river, water channel or pipeline.
9. a kind of -5 and 7 any water flow real-time online long-range survey system, feature exist according to claim 1
In: it further include equipment protecting device, plugging material and remote shooting system, the equipment protecting device includes fixed wall, right
Metering weir is protected, and the plugging material is waterproof material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459571A (en) * | 2022-04-12 | 2022-05-10 | 中国水利水电科学研究院 | River course initial water level determination method based on initial state water level curve cluster |
| CN114790721A (en) * | 2022-03-14 | 2022-07-26 | 兰州理工大学 | Water measuring weir with super-discharge capacity and arrangement method |
-
2018
- 2018-10-12 CN CN201821653567.9U patent/CN209014061U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790721A (en) * | 2022-03-14 | 2022-07-26 | 兰州理工大学 | Water measuring weir with super-discharge capacity and arrangement method |
| CN114459571A (en) * | 2022-04-12 | 2022-05-10 | 中国水利水电科学研究院 | River course initial water level determination method based on initial state water level curve cluster |
| CN114459571B (en) * | 2022-04-12 | 2022-06-07 | 中国水利水电科学研究院 | River course initial water level determination method based on initial state water level curve cluster |
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