CN202403773U - On-line verification/ calibration device for open channel flow meter - Google Patents
On-line verification/ calibration device for open channel flow meter Download PDFInfo
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- CN202403773U CN202403773U CN2011204583167U CN201120458316U CN202403773U CN 202403773 U CN202403773 U CN 202403773U CN 2011204583167 U CN2011204583167 U CN 2011204583167U CN 201120458316 U CN201120458316 U CN 201120458316U CN 202403773 U CN202403773 U CN 202403773U
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- stepper motor
- open channel
- screw mandrel
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- level transmitter
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Abstract
The utility model discloses an on-line verification/ calibration device for an open channel flow meter. A threaded hole support capable of meeting different water level heights of an open channel and adjusting the position of equipment is arranged on each of two sides of the open channel; a horizontal motor system formed by a first step motor and a first lead screw through a coupling is erected between the two threaded hole supports; a vertical motor system formed by a second step motor, a second lead screw and a guide rail through a coupling is arranged on one side of a sliding plate crossing the first lead screw, a liquid level transmitter is arranged on the other side of the sliding plate, and a current meter is fixedly arranged below a sliding plate on the second lead screw; and a measurement and control system is respectively in signal connection with the first step motor, the second step motor, the current meter and the liquid level transmitter. By adopting the device, the current situations that the open channel flow meter cannot be verified or calibrated for a long term and cannot be verified on line after the open channel flow meter is put into operation are eliminated, the metering precision of the flow meter is improved, and the discharge of enterprise sewage is effectively monitored.
Description
Technical field
The utility model belongs to technical field of fluid detection, relates to a kind of open-channel meter in-line calibration/calibrating installation.
Background technology
Open-channel meter is as the instrument of discharge of sewage metering; Extensively apply to industry, municipal wastewater emission monitoring metering; The fluid level transmitters that adopt combine flow channel (Bashel groove) and flow weir (sharp-crested weir) as flow measurement device more, and the precision of its flow metering depends on the accuracy of measurement of fluid level transmitter and geometry size, machining precision and the flow accumulation formula on flow channel or flow weir.Because quantity of wastewater effluent is measured the economic benefit that accuracy will directly have influence on enterprise and society, therefore must satisfactory discharge of sewage measuring instrument be installed to each disposal of pollutants check point.There is advanced technology in developed country; Can use for many years after the disposable completion of open channel discharge of sewage monitoring system; And domestic owing to various reasons, the open-channel meter that enterprise installs is not brought into play its due effect well, and also there are more problem in the actual Sewage metering and the calibration of open channel measuring instrument; Be mainly reflected in: after (1) flowmeter is installed; Owing to aging, fouling, failure and other reasons, make the accuracy of continuous data and reliability reduce, do not meet the requirement of country's metering laws and regulations and standard; (2) owing to the restriction of detection technique, open-ditch sewage flowmeter is in-line calibration or calibration regularly still at present, and underproof equipment can not in time be found and upgrade; (3) open-channel meter comparison distinct issues in Sewage metering are that instrument is examined and determine before installation or calibrated; Generally can't dismantle after coming into operation; Also can't carry out periodic verification to it, the data that monitoring obtains are an estimated value, have had a strong impact on social benefit.
Summary of the invention
The purpose of the utility model provides a kind of open-channel meter in-line calibration/calibrating installation, to improve the flow metering precision, guarantees the performance of enterprises and social equity.
The utility model comprises TT&C system, first stepper motor, first screw mandrel, second stepper motor, second screw mandrel, guide rod, current meter, fluid level transmitter and threaded hole support; Respectively install one in the both sides of open channel and satisfy different water level of open channel height only, the threaded hole support of conditioning equipment position; The horizontal electric system that is made up of through shaft coupling first stepper motor and first screw mandrel is erected between two threaded hole supports; The vertical electric system that is made up of through shaft coupling second stepper motor, second screw mandrel and guide rail is installed across one side of the slide plate on first screw mandrel; The slide plate opposite side is equipped with fluid level transmitter, slide plate on second screw mandrel below be installed with current meter; TT&C system is connected with first stepper motor, second stepper motor, current meter, fluid level transmitter signal respectively; According to concrete water level of open channel height; TT&C system output control pulse signal drives first stepper motor and second stepper motor; Control the movement travel direction of corresponding screw mandrel through the different directions of rotating of stepper motor, make that the slide plate on the screw mandrel carries out corresponding separately motion, thereby make current meter and fluid level transmitter move to the measurement that corresponding unique point is carried out data; Last TT&C system is sent to host computer with the measured data that obtain; Host computer is through the flow that calculates of formula (1), accomplishes the measurement of unique point, and the flow of this flow and measured flux meter is compared, analyzes the calibrating/calibration result that obtains the measured flux meter.
Open-channel meter in-line calibration/Calibration Method is to adopt velocity-area method to measure flow; Current meter measuring sonde and fluid level transmitter are controlled through the TT&C system output pulse signal, stretched in the open channel, according to the open channel structural parameters; Master system will be chosen the measurement features point automatically; Simultaneously flow area is divided into several elemental areas that area equates, current meter is measured the unique point flow velocity of each elemental area then, and represents the mean flow rate of each elemental area with this unique point flow velocity; Be calculated as follows out the flow Q of sewage, the data with the metering of measured flux meter compare, analyze the calibrating/calibration result that obtains the measured flux meter then:
V wherein
iBe the unique point speed on certain elemental area, A
iBe n the elemental area that is divided on the open channel cross section.
The beneficial effect of the utility model is: the utility model is simple in structure; Adopt velocity-area method to measure the flow of open channel; According to the width of open channel and the liquid level of flow area, system will choose measurement point quantity and position automatically, and data are obtained flow through integrating; Compare with the data of measured flux meter, thus the purpose that reaches calibrating and calibrate.Adopt the utility model to solve the present situation that open-ditch sewage flowmeter can not be examined and determine or calibrate for a long time and can not in-line calibration after putting into operation, improve the measuring accuracy of flowmeter, effectively monitoring enterprise sewage emissions amount.
Description of drawings
Fig. 1 is an open-channel meter calibrating installation structural representation;
Fig. 2 is the distributed architecture figure of open-channel meter speed measuring point;
Fig. 3 is an open-channel meter measuring process block diagram.
Embodiment
Further specify the utility model technology contents below in conjunction with accompanying drawing.
With reference to Fig. 1, open-channel meter in-line calibration/calibrating installation comprises TT&C system 1, stepper motor 2 and 3, screw mandrel 4 and 5, guide rail 6, current meter 7, fluid level transmitter 8 and support 9 compositions.Respectively install one in the both sides of open channel and satisfy different water level of open channel height only, the threaded hole support 9 of conditioning equipment position; Horizontal stepper motor 2 is installed on the suitable height of support through the horizontal electric system module that shaft coupling constitutes with horizontal lead screw 4; Simultaneously slide plate one side on the horizontal lead screw 4 is equipped with the vertical electric system module that vertical motor 3, screw mandrel 5 and guide rail 6 constitute through shaft coupling, and opposite side is equipped with fluid level transmitter 8; Vertically the slide plate below on the screw mandrel 5 is installed with current meter 7; TT&C system 1 is connected to stepper motor 2 and 3, current meter 7 and fluid level transmitter 8 through lead; According to concrete water level of open channel height TT&C system 1 output control pulse signal drive stepping motor 2 and 3; Control the movement travel direction of screw mandrels through the different rotation directions of stepper motor; Make the slide plate on the screw mandrel carry out corresponding separately motion, thereby current meter and fluid level transmitter move to the specific characteristic point, TT&C system reads the data of current meter 7 and fluid level transmitter 8 then; Then, TT&C system 1 control current meter 7 moves to next unique point, measuring liquid level and flow speed data with fluid level transmitter 8; Until measuring all unique points; Last TT&C system 1 is sent to host computer with the measurement data of all characteristic point positions and flow velocity through connection, and host computer calculates flow through formula (1); Thereby accomplish the measurement of flow, the flow of these data and measured flux meter is compared, analyzes the calibrating/calibration result that obtains the measured stream scale.
Fig. 2 is the technology path of measuring system, on the open channel cross section, flow area is divided into n little elemental area, on each elemental area, chooses representative unique point, measures each unique point speed; With the average velocity of unique point speed as each elemental area; Utilize the high-precision liquid level transmitter to measure the liquid level of channel flow measurement point,, utilize velocity-area method to set up flow measurement integrating model, realize the on-line measurement of the discharge of sewage in conjunction with the open channel width.
Fig. 3 is an instance according to the method for different flow rate measurement point.Calculating for the result of the measurement of flow velocity has several different methods, like vertical flow velocity curve method, some two point methods, three point method, four-six method and integral method etc.The legend exemplified one two point method carry out the measurement of flow velocity, channel is divided into the n five equilibrium on width, the width of each five equilibrium is Δ L, then the mean flow rate in area A=Δ L * H is:
One point method: v
m=v
0.6
Two-point method: v
m=(v
0.2+ v
0.8)/2;
Then flow is: Q=A * (v
M1+ v
M2+ ... v
Mn).
Claims (1)
1. open-channel meter in-line calibration/calibrating installation, it is characterized in that: it comprises TT&C system (1), first stepper motor (2), first screw mandrel (4), second stepper motor (3), second screw mandrel (5), guide rod (6), current meter (7), fluid level transmitter (8) and threaded hole support (9); Respectively install one in the both sides of open channel and satisfy different water level of open channel height only, the threaded hole support (9) of conditioning equipment position; Be erected between two threaded hole supports through the horizontal electric system that shaft coupling constitutes by first stepper motor (2) and first screw mandrel (4); The vertical electric system that is made up of through shaft coupling second stepper motor (3), second screw mandrel (5) and guide rail (6) is installed across slide plate one side on first screw mandrel (4); The slide plate opposite side is equipped with fluid level transmitter (8), slide plate on second screw mandrel (5) below be installed with current meter (7); TT&C system (1) is connected with first stepper motor, second stepper motor, current meter (7), fluid level transmitter (8) signal respectively; According to concrete water level of open channel height; TT&C system (1) output control pulse signal drives first stepper motor and second stepper motor; Control the movement travel direction of corresponding screw mandrel through the different directions of rotating of stepper motor; Make the slide plate on the screw mandrel carry out corresponding separately motion, thereby make current meter (7) and fluid level transmitter (8) move to the measurement that corresponding unique point is carried out data, TT&C system (1) is sent to host computer with the measured data that obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204583167U CN202403773U (en) | 2011-11-17 | 2011-11-17 | On-line verification/ calibration device for open channel flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204583167U CN202403773U (en) | 2011-11-17 | 2011-11-17 | On-line verification/ calibration device for open channel flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202403773U true CN202403773U (en) | 2012-08-29 |
Family
ID=46701415
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204583167U Expired - Fee Related CN202403773U (en) | 2011-11-17 | 2011-11-17 | On-line verification/ calibration device for open channel flow meter |
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| Country | Link |
|---|---|
| CN (1) | CN202403773U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245385A (en) * | 2013-05-16 | 2013-08-14 | 济南鲁纺仪佳自控技术有限公司 | Flow-rate self-correcting open channel flow measuring device |
| CN104535123A (en) * | 2014-12-29 | 2015-04-22 | 太原理工大学 | Online automatic channel flow measuring method |
| CN104535119A (en) * | 2014-12-29 | 2015-04-22 | 太原理工大学 | Automatic open channel flow measuring method |
| CN106014482A (en) * | 2016-07-08 | 2016-10-12 | 山东新河矿业有限公司 | Sensor positioning device for dynamically monitoring underground water of coal mine |
| CN111089627A (en) * | 2019-12-23 | 2020-05-01 | 太原理工大学 | Multi-resolution open channel automatic flow measuring device based on area flow velocity method |
| CN111609903A (en) * | 2020-06-24 | 2020-09-01 | 新乡市奥联电气设备有限公司 | Detection device of oil mass sensor |
| CN112964907A (en) * | 2021-02-08 | 2021-06-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Speed-adjustable low-speed high-precision flow speed calibration system in linear open trough and control method thereof |
| CN113483832A (en) * | 2020-11-07 | 2021-10-08 | 济南和一汇盛科技发展有限责任公司 | Online measuring device for water flow of channel |
-
2011
- 2011-11-17 CN CN2011204583167U patent/CN202403773U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245385A (en) * | 2013-05-16 | 2013-08-14 | 济南鲁纺仪佳自控技术有限公司 | Flow-rate self-correcting open channel flow measuring device |
| CN104535123A (en) * | 2014-12-29 | 2015-04-22 | 太原理工大学 | Online automatic channel flow measuring method |
| CN104535119A (en) * | 2014-12-29 | 2015-04-22 | 太原理工大学 | Automatic open channel flow measuring method |
| CN106014482A (en) * | 2016-07-08 | 2016-10-12 | 山东新河矿业有限公司 | Sensor positioning device for dynamically monitoring underground water of coal mine |
| CN106014482B (en) * | 2016-07-08 | 2018-07-17 | 山东新河矿业有限公司 | Sensor locator for underground coal mine water dynamic monitoring |
| CN111089627A (en) * | 2019-12-23 | 2020-05-01 | 太原理工大学 | Multi-resolution open channel automatic flow measuring device based on area flow velocity method |
| CN111609903A (en) * | 2020-06-24 | 2020-09-01 | 新乡市奥联电气设备有限公司 | Detection device of oil mass sensor |
| CN113483832A (en) * | 2020-11-07 | 2021-10-08 | 济南和一汇盛科技发展有限责任公司 | Online measuring device for water flow of channel |
| CN113483832B (en) * | 2020-11-07 | 2023-10-31 | 济南和一汇盛科技发展有限责任公司 | Channel water flow on-line measuring device |
| CN112964907A (en) * | 2021-02-08 | 2021-06-15 | 水利部交通运输部国家能源局南京水利科学研究院 | Speed-adjustable low-speed high-precision flow speed calibration system in linear open trough and control method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20131117 |