CN108871465A - Pipeline buoyancy flowmeter - Google Patents

Pipeline buoyancy flowmeter Download PDF

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Publication number
CN108871465A
CN108871465A CN201810739264.7A CN201810739264A CN108871465A CN 108871465 A CN108871465 A CN 108871465A CN 201810739264 A CN201810739264 A CN 201810739264A CN 108871465 A CN108871465 A CN 108871465A
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CN
China
Prior art keywords
host
pipeline
flowmeter
buoyancy
information
Prior art date
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.)
Pending
Application number
CN201810739264.7A
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Chinese (zh)
Inventor
李海燕
杨志超
朱颐
张晓然
刘俊峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Physichemistry Analysis & Measurment Centre
Beijing University of Civil Engineering and Architecture
Original Assignee
Beijing Physichemistry Analysis & Measurment Centre
Beijing University of Civil Engineering and Architecture
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Physichemistry Analysis & Measurment Centre, Beijing University of Civil Engineering and Architecture filed Critical Beijing Physichemistry Analysis & Measurment Centre
Priority to CN201810739264.7A priority Critical patent/CN108871465A/en
Publication of CN108871465A publication Critical patent/CN108871465A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The invention discloses a kind of pipeline buoyancy flowmeters, it includes supporting element, the supporting element top connects host (1), one end of the host (1) connects angle measurement unit, the angle measurement unit end connects buoyant device (4) by connecting rod, one end of the buoyant device (4) connects current meter, current meter metrical information passes back to host (1) by connecting rod (3) internal wire, host (1) is also connected with information delivery apparatus (7), the length of host (1) is not less than 100cm, it include power supply in host (1), data processing equipment, the data processing equipment is also respectively connected with data storage device, information launcher and SIM card, to store and to send data, the power supply is that the data processing equipment and the information launcher are powered.Overall cost is lower, energy loss is few, and only angle change record, change in flow record, information publication, energy installation space are larger, and energy alternate frequency is lower.

Description

Pipeline buoyancy flowmeter
Technical field
The present invention relates to a kind of flow measurement device, especially a kind of pipeline buoyancy flowmeter.
Background technique
The raising for the requirements such as modern city controls flood to heavy rain, pollution of area source controls, needs a kind of reliable real-time monitoring side Case is recorded, collected and is issued to flow velocity, flow information in pipeline.Chinese most cities drainage pipeline networks is because when building Between it is relatively early, do not configure monitoring system and energy resource system.
Currently used for measurement pipe flow speed, flow tool have ultrasonic flowmeter, turbine flowmeter, target type meter, Turbine flowmeter, variable area formula flowmeter etc..These flowmeters are each provided with certain measurement advantage, but wherein cost it is high, The disadvantages of more energy consumption, the drainage pipeline that cannot be applicable in various calibers, measurement data can not be issued is more prominent.Before accomplishing The record to flow velocity, flow information in pipeline is stated, then it is high to need to be transformed existing pipeline, cost, and energy alternate frequency is high.
Summary of the invention
First aspect present invention provides a kind of pipeline buoyancy flowmeter comprising supporting element, supporting element top connection master Machine, one end of the host connect angle measurement unit, which connects buoyant device by connecting rod, this is floating One end of power device connects current meter, and current meter metrical information passes back to host by connecting rod internal wire, and the host also connects Information delivery apparatus is connect, it includes power supply, data processing equipment, the number in the host that the length of the host, which is not less than 100cm, It is also respectively connected with data storage device, information launcher and SIM card according to processing equipment, it is described to store and send data Power supply is that the data processing equipment and the information launcher are powered.
Preferably, information delivery apparatus is arranged in host, and by the antenna of connection host one end to pipeline outgoing Penetrate signal.Preferably, the information delivery apparatus is connected directly on the outside of host by socket.
It is further preferred that the information delivery apparatus is loaded on pipeline exit, and connected by wired mode or wireless mode It is connected to the host.
It, can be to terminal APP when locking system is triggered it is further preferred that locking system is arranged in the angle measurement unit Alarm.
Preferably, connecting rod is telescopic mechanism, and the minimum length of the connecting rod is greater than pipe diameter, and by connecting rod Length value input terminal app.
Preferably, the supports support is in the cross section of the pipeline, the centerline axis parallel of the supporting element in The cross section of the pipeline.
Preferably, the supporting element includes fixed part and telescopic section, which is hinged by fixed It is connected to pipeline bottom wall top, the telescopic section is also connected with above the fixed part, is equipped at the top of the telescopic section described Host.
Preferably, gasket is set between the host and the duct top wall, rises contact pipeline top to buffer host Issuable impact force when wall, while making to keep a spacing between host top surface and the duct top wall using the thickness of gasket From the rotation angle of connecting rod is rotated and measured under buoyancy convenient for angle measurement unit.
Preferably, measuring device built in the supporting element, to measure pipe diameter or duct height, which will The data of pipe diameter or duct height are transmitted to host, to complete subsequent calculation procedure.
Preferably, the telescopic section outer surface indicates scale, convenient artificial reading pipe diameter or duct height, behaviour After making personnel's reading pipe diameter or duct height, host is inputted, convenient for calculating and exporting.
Preferably, to cell phone application system or monitoring system, i.e., the information delivery apparatus can issue data:By flow Meter monitoring data pass back to system, and are calculated and shown, what can be looked on mobile phone is APP system, can also connect and need this The networking client or module of a little data.
Preferably, the cell phone application system receives monitoring data and carries out operation, output report, and report content includes Equipment electricity simultaneously reminds the supplement energy.
It preferably, include calculation procedure in the host
Preferably, the host housing is through waterproof, preservative treatment.
It is further preferred that anticollision frame is set with outside the current meter, in order to avoid current meter collision tube wall damage.
It is further preferred that the anticollision frame installs channelization angle additional before buoyant device, it can prevent some dirts from making to rotation paddle It is damaged at impact.
Preferably, anticollision frame is added at the buoyant device rear, prevents sundries from colliding.
Preferably, the connection between the supporting element and the host is replaceable connection, that is, the supporting element can be with It removes from the host without damaging the host and the supporting element, and the host can also reconnect other different lengths Supporting element, the duct survey requirement of different tube diameters is adapted to by the scheme of replaceable supporting element.
Second aspect of the present invention also provides a kind of pipeline buoyancy flowmeter comprising host, one end joint angle of the host Measuring device is spent, which connects buoyant device by connecting rod, and one end of the buoyant device connects flow velocity The information of meter, current meter measurement passes back to host by the electric wire inside connecting rod, the other end link information distributing device of host, The length of host is not less than 100cm, includes power supply, data processing equipment in host, which is also respectively connected with number According to storage device, information launcher and SIM card, to store and send data, the power supply is the data processing equipment It powers with the information launcher.The pipeline buoyancy flowmeter is installed on discharge outlet, and is fixed on discharge outlet using bayonet. 1 shell of host is through waterproof, preservative treatment.
The working principle of above-mentioned pipeline buoyancy flowmeter is:By the supports support of regular length in conduit section, make Host is close to the upper surface of the pipeline, so that the pipeline buoyancy flowmeter be made to be installed in pipeline to be measured;In pipeline Fluid flowing when, test the speed via current meter and the flow velocity data back that will measure be to host, herein host be save the energy and Inner space can not have to be calculated, it is only necessary to record data, then directly transmit data to external monitoring system or hand Machine APP is calculated and is shown by external monitoring system or cell phone application.
Pipeline buoyancy flowmeter bring good effect of the present invention is that 1. overall costs are lower;2. energy loss is few, Only angle change record, change in flow record, information issue the energy consumption of 3. parts, meet the need of continuous monitoring data for a long time It asks;3. energy installation space is larger, energy alternate frequency is lower;4. data can be issued to mobile phone or system APP.
Detailed description of the invention
Fig. 1 is the mounting structure schematic diagram of a preferred embodiment of pipeline buoyancy flowmeter of the present invention;
Fig. 2 is the mounting structure schematic diagram of the another preferred embodiment of pipeline buoyancy flowmeter of the present invention;
Fig. 3 is pipeline without the cross-sectional view under siltation state, wherein marking calculating parameter;
Fig. 4 is the cross-sectional view under pipeline predicted state;
Fig. 5 is the structural schematic diagram of the anticollision frame of embodiment described in Fig. 1;
Fig. 6 is the corresponding relationship in pipeline between siltation and water velocity;
Numeral mark is meant that in Fig. 1-Fig. 4:
1. 4. buoyant device of host 2. angel measuring instrument, 3. connecting rod, 5. propeller current meter
6. 7. information of gasket issues antenna.
Specific embodiment
Embodiment 1.1:Pipeline buoyancy flowmeter, pipeline buoyancy flowmeter as shown in Figure 1 comprising supporting element, the branch Support member top connects host 1, and one end of the host 1 connects angel measuring instrument 2, which is connected by connecting rod 3 Buoyant device 4 is connect, one end of the buoyant device 4 connects propeller current meter 5, and the information that propeller current meter 5 measures is by connecting Electric wire inside bar 3 passes back to host 1, and host 1 is also connected with information delivery apparatus 7, and the length of host 1 is 100cm, in host 1 Including power supply, data processing equipment, which is also respectively connected with data storage device, information launcher and SIM Card, to store and send data, the power supply is that the data processing equipment and the information launcher are powered.
In the present embodiment, information delivery apparatus 7 is loaded on pipeline exit, and is connected to host 1 by wired mode.
Angel measuring instrument 2 further includes locking system, can be to the APP system alarm of mobile phone terminal when locking system is triggered.
Preferably, connecting rod is telescopic mechanism, and the minimum length of the connecting rod is greater than pipe diameter, and by connecting rod Length value input terminal app.
The supports support is in the cross section of the pipeline, and the centerline axis parallel of the supporting element is in the pipeline Cross section.
The supporting element includes fixed part and telescopic section, which is connected to pipeline bottom by fixed hinge Wall top, the fixed part top are also connected with the telescopic section, host 1 are housed at the top of the telescopic section.
Gasket 6 is set between host 1 and the duct top wall, may be produced with buffering when host 1 rises contact duct top wall Raw impact force, while making to keep certain distance between 1 top surface of host and the duct top wall using the thickness of gasket 6, it is convenient for Angel measuring instrument 2 rotates under buoyancy and measures the rotation angle of connecting rod 3.
Measuring device built in the supporting element, to measure pipe diameter or duct height, the measuring device is by pipe diameter Or the data of duct height are transmitted to host 1, to complete subsequent calculation procedure.
The telescopic section outer surface of the supporting element indicates scale, convenient artificial reading pipe diameter or duct height, behaviour After making personnel's reading pipe diameter or duct height, host 1 is inputted, convenient for calculating and exporting.
To cell phone application system or monitoring system, i.e., information delivery apparatus 7 can issue data:Flowmeter monitoring data are returned System is passed to, and is calculated and is shown, what can be looked on mobile phone is APP system, can also connect the network for needing these data Client or module.
The cell phone application system receives monitoring data and simultaneously carries out operation, output report, report content include equipment electricity simultaneously Remind the supplement energy.
It include calculation procedure in host 1
1 shell of host is through waterproof, preservative treatment.
Embodiment 1.2:Pipeline buoyancy flowmeter, with embodiment 1.1, the difference is that:It is set with outside propeller current meter 5 Anticollision frame, as shown in figure 5, in order to avoid current meter collision tube wall damage.
The anticollision frame installs channelization angle additional before buoyant device, can prevent some dirts from causing impact to damage rotation paddle Evil.
Embodiment 1.3:Pipeline buoyancy flowmeter, with embodiment 1.2, the difference is that:4 rear of buoyant device is added anti- Frame is hit, prevents sundries from colliding.
Embodiment 1.4:Pipeline buoyancy flowmeter, with embodiment 1.1, the difference is that:The supporting element and the master Connection between machine 1 is replaceable connection, that is, the supporting element can be removed from host 1 without damaging host 1 and the support Part, and host 1 can also reconnect the supporting element of other different lengths, adapt to different tube diameters by the scheme of replaceable supporting element Duct survey requirement.
Embodiment 1.5:Pipeline buoyancy flowmeter, with embodiment 1.1, the difference is that:The length of host 1 is 110cm.
Embodiment 1.6:Pipeline buoyancy flowmeter, with embodiment 1.1, the difference is that:The setting of information delivery apparatus 7 exists In host, and signal is emitted to outside pipeline by the antenna of connection host one end.
Embodiment 1.7:Pipeline buoyancy flowmeter, with embodiment 1.1, the difference is that:Information delivery apparatus is by inserting Mouth is connected directly on the outside of host.
Embodiment 2.1:Pipeline buoyancy flowmeter, as shown in Fig. 2, pipeline buoyancy flowmeter comprising host 1, the host 1 One end connect angel measuring instrument 2,2 end of angel measuring instrument by connecting rod 3 connect buoyant device 4, the buoyant device 4 One end connects propeller current meter 5, and the information that propeller current meter 5 measures passes back to host 1 by the electric wire inside connecting rod 3, The other end link information distributing device 7 of host 1, the length of host 1 are 120cm, are set in host 1 including power supply, data processing Standby, which is also respectively connected with data storage device, information launcher and SIM card, to store and to send number According to the power supply is that the data processing equipment and the information launcher are powered.In the present embodiment, by pipeline buoyancy flow Meter is installed on discharge outlet, and is fixed on discharge outlet using bayonet.1 shell of host is through waterproof, preservative treatment.
Embodiment 2.2:Pipeline buoyancy flowmeter, with embodiment 2.1, the difference is that:Angel measuring instrument 2 further includes lock Locking apparatus can be to the APP system alarm of mobile phone terminal when locking system is triggered.
Connecting rod is telescopic mechanism, and the minimum length of the connecting rod is greater than pipe diameter, and by the length value of connecting rod Input terminal app.
Embodiment 2.3:Pipeline buoyancy flowmeter, with embodiment 2.1, the difference is that:It include calculating journey in host 1 Sequence, propeller current meter 5 are set with anticollision frame outside, in order to avoid current meter collision tube wall damage.The anticollision frame is in buoyant device Preceding installation channelization angle can prevent some dirts from causing impact to damage rotation paddle.
Embodiment 2.4:Pipeline buoyancy flowmeter, with embodiment 2.3, the difference is that:4 rear of buoyant device is added anti- Frame is hit, prevents sundries from colliding.
The calculating of pipeline buoyancy flowmeter is former in above-described embodiment 1.1- embodiment 1.7 and embodiment 2.1- embodiment 2.4 Reason is:
A. the depth of water is calculated:H=L sin θ
Wherein:
L --- connection pole length measures connection pole length by laying personnel in installation aiding device.The pars contractilis of telescopic rod Position design graduated scale, to directly read the length of telescopic rod.
θ --- angle measurement is measured by angle measurement unit.
B. it calculates and is full of angle:Wherein:D --- pipe diameter.
C. flow section area is calculated:
D. flow is calculated:Q=Av, wherein:V --- flow rate measurements.
The calculating step of above-mentioned A-D, embeddable monitoring system or cell phone application, count data transmitted by flowmeter It calculates, is convenient for subsequent processing and displaying.
Pipeline buoyancy flowmeter provided in embodiment 1.1- embodiment 1.7 and embodiment 2.1- embodiment 2.4 can also Pipeline siltation degree is assessed by monitoring data, by the velocity formula of sewer under the conditions of steady flow it is found that flowing in pipeline The flow speed value of body:
In formula:The flow velocity (m/s) of v --- fluids within pipes;
The hydraulic radius (m) of R --- pipeline;
I --- the water conservancy gradient in pipeline;
The coefficient of roughness of n --- pipeline.
In same pipeline, water conservancy gradient and the coefficient of roughness are fixed value, and hydraulic radius R=A/ χ, A are flow section face Product, χ are water flow wetted perimeter.By comparing under the same liquid level of the pipeline, there is siltation pipe flow speed value and without siltation pipe flow speed The difference of value just can determine that its siltation degree.
Illustration about pipeline siltation:
Assuming that the round tube that a diameter is 1m, Manning coefficient n=0.012, conduit slope I=0.003, as depth of water h= When 0.8m, water volume flow rate byIt is calculated, v=2.06m/s.Under the conditions of same pipeline, depth of water h=0.8m, if There are deposit, deposit area of section and pipeline section area ratio B and water volume flow rate situation of change such as following table:
The corresponding relationship of 1 pipeline of table siltation and water velocity, pipeline section product
Serial number B (%) Deposit area of section (m2) Water volume flow rate (m/s)
1 10% 0.079 1.95
2 18% 0.142 1.86
3 26% 0.204 1.76
4 33% 0.259 1.67
5 41% 0.322 1.55
6 49% 0.385 1.42
7 57% 0.448 1.28
8 64% 0.503 1.13
9 72% 0.565 0.91
10 80% 0.628 0.58
With the increase of deposit known to illustration, the water volume flow rate of the same depth of water can accelerate to reduce.It is detected using the present invention The obtained depth of water, flow speed value can estimate the siltation degree of deposit in pipeline.

Claims (10)

1. pipeline buoyancy flowmeter comprising supporting element, the supporting element top connect host (1), one end connection of the host (1) Angle measurement unit, the angle measurement unit end connect buoyant device (4) by connecting rod, one end of the buoyant device (4) Current meter is connected, current meter metrical information passes back to host (1) by connecting rod (3) internal wire, it is characterised in that:Host (1) It is also connected with information delivery apparatus (7), the length of host (1) is not less than 100cm, sets in host (1) including power supply, data processing Standby, which is also respectively connected with data storage device, information launcher and SIM card, to store and to send number According to the power supply is that the data processing equipment and the information launcher are powered.
2. pipeline buoyancy flowmeter comprising one end of host (1), the host (1) connects angle measurement unit, the angle measurement By connecting rod (3) connection buoyant device (4), one end of the buoyant device (4) connects current meter, current meter measurement for device end Information passed back to host (1) by the internal electric wire of connecting rod (3), the other end link information distributing device (7) of host (1), It is characterized in that:The length of host (1) is not less than 100cm, includes power supply, data processing equipment, the data processing in host (1) Equipment is also respectively connected with data storage device, information launcher and SIM card, and to store and send data, the power supply is The data processing equipment and information launcher power supply, pipeline buoyancy flowmeter is installed on discharge outlet, and uses bayonet It is fixed on discharge outlet.
3. pipeline buoyancy flowmeter as claimed in claim 1 or 2, it is characterised in that:Pipeline silt is assessed by monitoring data Product degree, by the velocity formula of sewer under the conditions of steady flow it is found that the flow speed value of fluids within pipes:
In formula:The flow velocity (m/s) of v --- fluids within pipes;
The hydraulic radius (m) of R --- pipeline;
I --- the water conservancy gradient in pipeline;
The coefficient of roughness of n --- pipeline;
In same pipeline, water conservancy gradient and the coefficient of roughness are fixed value, and hydraulic radius R=A/ χ, A are flow section area, χ For water flow wetted perimeter;By comparing under the same liquid level of the pipeline, there is siltation pipe flow speed value and without siltation pipe flow speed value Difference just can determine that its siltation degree.
4. pipeline buoyancy flowmeter as claimed in claim 1 or 2, it is characterised in that:Locking is arranged in the angle measurement unit Device can be alarmed to terminal APP when locking system is triggered.
5. pipeline buoyancy flowmeter as described in claim 1, it is characterised in that:The supports support is in the cross of the pipeline Section, the centerline axis parallel of the supporting element is in the cross section of the pipeline.
6. pipeline buoyancy flowmeter as claimed in claim 5, it is characterised in that:The supporting element includes fixed part and stretches Part, the fixed part bottom are connected to pipeline bottom wall top by fixed hinge, and described stretch is also connected with above the fixed part Contracting part, the telescopic section top are equipped with the host.
7. pipeline buoyancy flowmeter as claimed in claim 1 or 2, it is characterised in that:Between host (1) and the duct top wall Gasket is set, issuable impact force when buffering host (1) rising contact duct top wall, while being made using the thickness of gasket Certain distance is kept between host top surface and the duct top wall, rotates and measures under buoyancy convenient for angle measurement unit The rotation angle of connecting rod.
8. pipeline buoyancy flowmeter as described in claim 1, it is characterised in that:Measuring device built in the supporting element, to survey Pipe diameter or duct height are measured, which is transmitted to host for the data of pipe diameter or duct height, with after the completion Continuous calculation procedure.
9. pipeline buoyancy flowmeter as claimed in claim 1 or 2, it is characterised in that:Information delivery apparatus (7) publication data arrive Cell phone application system or monitoring system, i.e.,:Flowmeter monitoring data are passed back into system, and is calculated and is shown, it can on mobile phone What is looked into is APP system, moreover it is possible to which connection needs the networking client or module of these data.
10. pipeline buoyancy flowmeter as claimed in claim 1 or 2, it is characterised in that:The cell phone application system receives monitoring Data simultaneously carry out operation, and output report, report content includes equipment electricity and reminds the supplement energy.
CN201810739264.7A 2018-07-06 2018-07-06 Pipeline buoyancy flowmeter Pending CN108871465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810739264.7A CN108871465A (en) 2018-07-06 2018-07-06 Pipeline buoyancy flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810739264.7A CN108871465A (en) 2018-07-06 2018-07-06 Pipeline buoyancy flowmeter

Publications (1)

Publication Number Publication Date
CN108871465A true CN108871465A (en) 2018-11-23

Family

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Application Number Title Priority Date Filing Date
CN201810739264.7A Pending CN108871465A (en) 2018-07-06 2018-07-06 Pipeline buoyancy flowmeter

Country Status (1)

Country Link
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2569145Y (en) * 2002-09-13 2003-08-27 李渡峰 Anti-water weeds device for hydrological cableway flowmeter
KR20070100194A (en) * 2007-08-06 2007-10-10 주식회사 시온테크닉스 Flowmeter for small water-supply
CN201060209Y (en) * 2007-06-15 2008-05-14 王沛云 Novel portable propeller current velocity sensor
CN102155960A (en) * 2011-03-10 2011-08-17 中国农业科学院农田灌溉研究所 Flowmeter for final-stage channel
CN204374232U (en) * 2015-02-08 2015-06-03 赵杰 Anti-foreign material are wound around rivers and canals flow rate of water flow measuring instrument
CN105067058A (en) * 2015-08-19 2015-11-18 上海航征测控系统有限公司 Non-contact measuring system and method for drainage pipeline fluid flow
CN206019727U (en) * 2016-09-07 2017-03-15 上海航征测控系统有限公司 A kind of contactless floss hole flow monitoring device
CN207213291U (en) * 2017-02-08 2018-04-10 广州锐骏盈管道检测有限公司 A kind of urban underground water drainage pipe road volume control device
CN207600534U (en) * 2017-11-15 2018-07-10 北京华宇天威科技有限公司 A kind of distributed stream measuring device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2569145Y (en) * 2002-09-13 2003-08-27 李渡峰 Anti-water weeds device for hydrological cableway flowmeter
CN201060209Y (en) * 2007-06-15 2008-05-14 王沛云 Novel portable propeller current velocity sensor
KR20070100194A (en) * 2007-08-06 2007-10-10 주식회사 시온테크닉스 Flowmeter for small water-supply
CN102155960A (en) * 2011-03-10 2011-08-17 中国农业科学院农田灌溉研究所 Flowmeter for final-stage channel
CN204374232U (en) * 2015-02-08 2015-06-03 赵杰 Anti-foreign material are wound around rivers and canals flow rate of water flow measuring instrument
CN105067058A (en) * 2015-08-19 2015-11-18 上海航征测控系统有限公司 Non-contact measuring system and method for drainage pipeline fluid flow
CN206019727U (en) * 2016-09-07 2017-03-15 上海航征测控系统有限公司 A kind of contactless floss hole flow monitoring device
CN207213291U (en) * 2017-02-08 2018-04-10 广州锐骏盈管道检测有限公司 A kind of urban underground water drainage pipe road volume control device
CN207600534U (en) * 2017-11-15 2018-07-10 北京华宇天威科技有限公司 A kind of distributed stream measuring device

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Application publication date: 20181123