CN201787986U - Water flow measuring device of gas-water multiphase-flow water delivery system - Google Patents
Water flow measuring device of gas-water multiphase-flow water delivery system Download PDFInfo
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- CN201787986U CN201787986U CN2010202076394U CN201020207639U CN201787986U CN 201787986 U CN201787986 U CN 201787986U CN 2010202076394 U CN2010202076394 U CN 2010202076394U CN 201020207639 U CN201020207639 U CN 201020207639U CN 201787986 U CN201787986 U CN 201787986U
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Abstract
The utility model discloses a water flow measuring device of a gas-water multiphase-flow water delivery system, which comprises a buffering degasser, a liquid level regulating valve, a liquid level regulator, a flowmeter and a liquid level measuring instrument, wherein the buffering degasser comprises an automatic exhaust valve arranged at the top, a drain valve or a draining hole arranged at the bottom, a liquid level measuring instrument arranged thereon, and a flowmeter and a liquid level regulating valve arranged at the lower part, and the liquid regulating valve is arranged at the downstream of the flowmeter; the liquid level regulator can be arranged on the ground or in a control room; and signal transmission is realized between the liquid level measuring instrument and the liquid level regulator and the liquid level regulating valve by cables. The water flow measuring device can measure the water flow rate of the gas-water multiphase-flow water delivery system more accurately, and decreases the error range of the flowmeter.
Description
Technical field
The utility model relates to a kind of liquid flow measurement technology, particularly a kind of air water polyphasic flow water-carriage system measuring water flow device.
Background technology
Quote river, reservoir water resource, utilize the geographic position height fall, make water flow automatically to municipal water factory, industrial and mining enterprises, all will carry out accurate measurement so that calculate the water rate handing-over that carries on trade water.Big drop pipeline self water-carriage system is because of the complicacy of pipeline inner fluid state, bad all the time solution flow metering, existing most flowmeter can not directly use, and also not directly is used in piping system flow metering such as discharge of river meter, open-channel meter etc. simultaneously.The expert of famous both at home and abroad instrument manufacturer such as Yokogawa, Emerson, Siemens, ABB and domestic each big designing institute, all failing to design and develop out suitable instrument meets the demands, and each designing institute generally also is directly to select an existing instrument to be installed on the pipeline when doing the engineering design.
Air water polyphasic flow water-carriage system, generally be that the seller builds a big pond in higher place in the geographic position, such as natural pond, artificial reservior, water pump water lift cistern, cavern etc., water-carriage system is the combination of the long distance water transfer open channel that lays along physical features, tunnel, pressure pipeline etc., water gravity flow in the big pond directly enters the long distance water transfer system, the buyer fetches water by branch at water-carriage system downstream correct position, a branch has a family or the water intaking of number man, and this system generally exists following common feature:
1, water quality is relatively poor, is mixed with a large amount of silts, leaf, branch in the water, and when especially having length to exist apart from open channel in the long distance water transfer system, this situation is the most serious.
2, water-carriage system is tree-shaped distribution, and main or an arm may have a few service water units water simultaneously simultaneously, and each family expenses water yield size, geographic position sea level elevation are different.
3, water unit generally is municipal tap water factory or large enterprises, and water intaking place generally is the water-carriage system pressure pipeline that is in urban fringe or population concentration zone, center.
4, water-supplying unit generally is discharging water from cistern of being interrupted for avoiding Long-distance Pipeline for Water Conveyance superpressure booster or the overflow of long distance water transfer open channel; Water unit is water always also, and constant basis water especially always is not under the situation of the continuous maximum flow that can pass through of long-distance pipe at flow, may have semicanal situation or biphase gas and liquid flow situation for a long time in the pipeline in the gravity flow process.
5, the upstream and downstream drop is big, and atmospheric pressure siphonage acting force is stronger.So, be air-flow in the pipeline beginning to send water and stopping to send in the quite a while in water stage, follow by biphase gas and liquid flow, have only that to stablize big flow water be just may be steady flow in the pipeline.
5, the annual water consumption of water unit is big, and the accuracy of measuring influences the very big economic interests of both sides of supply and demand, and 1% error may cause the millions of water rate error of hundreds of thousands.
The measuring accuracy of water meter is lower, and according to the open source information of domestic best Ningbo Water Meter Factory of water meter manufacturing enterprise, the water meter error of indication is: from comprising that minimum flow is to the low district that does not comprise the flow of demarcating: error is ± 5%; From comprising that the boundary flow is to the height district that comprises maximum flow: error is ± 2%.But the accuracy of water consumption measurement is both with survey instrument---measuring instrument is relevant, again with measured object---user's characteristic of water use is relevant, and first inspection and cycle are changed the influence of characteristic of water use to measuring of not considering the user.The meter characteristic of water meter also can change along with the passing of water meter service time, Xin Biao be different at meter characteristic with water meter because the wearing and tearing of water meter mechanical part and the influence of service condition can exert an influence to the error in dipping of water meter.Learn from " how correctly treating the initiating flow of water meter " literary composition of " industry measurement " 2006.4 phases Zhang Shihao of the 24th～26 page of water meter Working Committee of China metering association, Ye Xiancang etc., " in actual the use; error in dipping can not be within ± 5% scope; experiment confirm is mostly more than ± 20%, have in addition greatly to 30%, 40%, 50% "." China's metering " 2006.5 phase, Zhengzhou Running-water Company appointed beautiful beautiful " the online study on accuracy of water meter " literary composition to write, and " if water quality is relatively poor, after fouling in the water meter, the foreign material deposition; water meter can be progressively fast; be higher than the current tangential impact impeller of design current velocity, quickened the impeller rotation, the water meter polarization.Use the water meter in several years, fast 10～80%, normal phenomenon is blocked filter mesh, can make water meter fast 5%, blocks the impeller box inlet opening, can make water meter fast 200%.”
Because water meter is the displacement machine instrument, the air flow impeller rotates equally, so exist under the situation of aforementioned water quality inferiority, two-phase flow at big drop pipe gravity flow pipeline water-carriage system, using water meter is impossible correct metering.Moreover the foreign material such as silt stone club in the water can damage the mechanical impeller of water meter.Industrial user that water consumption is big or the water inlet of waterworks metering, preferably without water meter measurement, best error also is because best as previously mentioned water meter dispatches from the factory ± and 2%, if 1,000,000 tons of the annual waters of large user, error in dipping just has 20,000 tons, and water rate is by 2 yuan/ton, be worth 40,000 yuan, if ± 5% error, error in dipping has 50,000 tons, is worth 100,000 yuan.Use the water meter in several years, fast 10～80% back error in dippings are worth and can reach 20～1,600,000 yuan.
Electromagnetic flowmeter and ultrasonic flow meter are a large amount of in recent years high-precision measuring instrument of using, and have the advantages that range ability is big, measuring accuracy is high.That electromagnetic flowmeter measures is the volumetric flow rate of liquid: Q=AV, wherein A: the sectional area of pipeline, V: the mean flow rate of water; So using maximum taboo of Electromagnetic Flow timing is " sky ", what is called is avoided " sky ", even fluid to be measured must be full of pipeline during with electromagnetic flowmeter, does not also allow there is bubble in the liquid.If liquid is not full of pipeline: one, the cross section of real fluid will be inconsistent with cross section in the pipeline, cause volume calculated flow value deviation very big; Its two, the conductor that nonconducting gas phase layer or bubble have been blocked between two electrodes connects, the condition of Faraday's law does not satisfy, and draws correct flow velocity V thereby can not induce the electromotive force that is directly proportional with flow, causes volume calculated flow value deviation very big.
The countermeasure of general anti-" sky " is to select from the installation aspect to be installed on the bottom-up mobile vertical pipe of fluid as far as possible.As on the pipeline that must be installed in level or inclination the time, then the measuring tube center of electromagnetic flowmeter should be lower than pipeline center, guaranteeing measuring tube full of liquid all the time, and guarantees that the plane at electrode place is parallel to the ground.The valve of Control Flow should be installed in the downstream of electromagnetic flowmeter, in order to avoid produce bubble or full packages not.These are to be difficult to realize in big drop pipe gravity flow pipeline water-carriage system, because drop is big, are difficult to look for a segment pipe to eliminate interim blank pipe or the two-phase flow that causes because of siphonage under the big drop situation.
Ultrasonic flow meter is to be principle with " velocity contrast method ", measures to be full of closed circular liquid in pipe stream.Principle of work is: its velocity of propagation will be subjected to the influence of rate of flow of fluid when ultrasound wave was propagated in fluid, can detect flow rate of fluid and then converse flow by measuring ultrasound wave velocity of propagation in fluid: Q=VA, A: pipeline section is long-pending.So after in a single day ultrasonic flow meter dispatched from the factory and install, the size of flux cumulating value was decided by the flow velocity and the caliber of water, be that basic judgement such as turbulent flow, laminar flow, semicanal, two-phase flow does not go out to the pipeline inner fluid.Moreover transit-time ultrasonic flow meter is responsive especially to the bubble of sneaking in the water, and the bubble that thereupon flows through can cause the instability of flowmeter indicating value, if the bubble that gathers just in time attached on the probe of being installed, will cause flowmeter can't work at all.
In west, Henan area one large-scale stateowned enterprise, water of productive use is by big drop pipe gravity flow pipeline water-carriage system water intaking, water-carriage system whole process is provided with open channel, pressure line, tunnel etc. along ground, knob, completely the sea level elevation difference is maximum 93.8 meters, 71.8 meters of reservoir, the inlet of culvert height above sea level discrepancy in elevation of the upstream of water intaking place and water-carriage system.This unit once used the mechanical water meter water measurement in history, but silt stone and club impact water meter mechanical part causes water meter often to damage in the water, installation accuracy was than higher flow type electromagnetic flowmeter afterwards, be installed on a gradient and be not on the very big descending pipeline, the daily interruption water of this unit, the test satellite location operator on duty said before water supply and in the back quite a while of cutting off the water, it is very big to judge in the pipeline airshed from sound near near water pipe next door and flowmeter the vent valve, but electromagnetic flowmeter still measures and very big instantaneous delivery arranged at this moment.One time both sides of supply and demand produce dispute with regard to measurement problem, please examine and determine by the on-the-spot water flow standard apparatus LJZ of using of Henan Province metering scientific research institute (15～600), during calibrating for guaranteeing by with electromagnetic flowmeter with the water of water flow standard apparatus flowmeter full packages to greatest extent, artificially strengthen output to greatest extent, calibration result is: in the error with the DN400 electromagnetic flowmeter is+12.59%, and physical resource can be seen liquid stream word 20090804-120; In the error with the DN600 electromagnetic flowmeter is+17.67%, and physical resource can be seen liquid stream word 20090804-121.The staff of this factory says that the artificial big flow when this station-service water does not reach calibrating and measuring at all under the normal condition is so this error should be a least error.1.4 ten thousand tons of the average daily waters of this factory, press the Error Calculation of verification result, should annually measure nearly 64.33 ten thousand tons with the metering of DN400 electromagnetic flowmeter more, should annually measure 90.29 ten thousand tons with the metering of DN600 electromagnetic flowmeter more, according to 2.88 yuan of/ton calculating of water unit price, minimum 185.27～2,600,000 yuan/year of direct economic loss.
Other flowmeters also are accurately to measure as vortex shedding flow meter, differential pressure flowmeter etc. to air-water two phase flow, discuss a lot on relevant teaching material and the flow measurement monograph, can not measure especially the air-water two phase flow that contains a large amount of impurity, impurity can damage the vortex shedder and the differential pressure flowmeter differential pressure generation part of vortex shedding flow meter easily and stop up connecting pipe.
The utility model content
Technical problem to be solved in the utility model provides a kind of air water polyphasic flow water-carriage system measuring water flow device, thus the discharge that can comparatively accurately measure air water polyphasic flow water-carriage system.
For the purpose that realizes solving the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of air water polyphasic flow water-carriage system measuring water flow device of the present utility model comprises buffering deaerator, Liquid level adjusting valve, regulator of level, flowmeter, level gauging instrument; The buffering deaerator comprises the automatic exhaust steam valve that is installed on its top, is installed on blowoff valve or mudhole, the level gauging instrument that is mounted thereon of its bottom, is installed on flowmeter and Liquid level adjusting valve on the outlet conduit of its underpart, and Liquid level adjusting valve is installed on the downstream of flowmeter; The pulpit can be installed or be installed on to regulator of level on the spot; Level gauging instrument and regulator of level, Liquid level adjusting valve are realized the signal transmission by cable.
Air water polyphasic flow water-carriage system measuring water flow device of the present utility model, described flowmeter comprises secondary instrument, and the pulpit can be installed or be installed on to secondary instrument on the spot.Can the data presentation of flowmeter to secondary instrument, control and demonstration by secondary instrument thereby make things convenient for.
Air water polyphasic flow water-carriage system measuring water flow device of the present utility model, described buffering deaerator can be selected the separation vessel of various structures for use, designs separation vessel based on separation method commonly used such as gravity settling, baffling separation, centrifugal force separation, silk screen separation, ultra-filtration and separation, filler separation etc. and can use.Calculate the volume and the length-diameter ratio of separation vessel according to the discharge size, according to the good container pressure grade of water system head pressure size design.
The length-diameter ratio design of described buffering deaerator, the regulation that should meet the gas-liquid separator design HG/T 20570.8-95 in the Ministry of Chemical Industry's standard technology systems engineering designing technique regulation in principle, but according to actual geographic restriction and fluid media (medium) parameter, can exceed this regulation personalized design, but the diameter D that must guarantee buffering deaerator 1 is greater than the caliber of feed pipe, to guarantee that medium enters a big container, the instant decompression gasification also realizes that the thorough separation of gas-liquid and solid impurity precipitate.
The top of described buffering deaerator is equipped with automatic exhaust steam valve, discharges automatically and sucks to guarantee the gas after the separation, and automatic exhaust steam valve automatically shut down when the interior liquid level of buffering deaerator reached buffering deaerator top, guaranteed that water can not overflow; Increase suddenly at buffering deaerator aquifer yield simultaneously, automatic exhaust steam valve can suck air rapidly again by vent valve, prevents negative pressure and damages the buffering deaerator.Select for use plumbing industry automatic exhaust steam valve such as CARX-I combined type rapid escape valve commonly used to get final product, according to the size of user's water-carriage system head pressure size and buffering deaerator volume, select suitable pressure rating and bore to get final product during type selecting.
The below of described buffering deaerator is provided with sewage draining exit, and blowoff valve or mudhole can be installed, and realizes artificial or automatic pollution discharge, gets rid of the solid impurity of sedimentation in the buffering deaerator.
Described buffering deaerator, according to user's actual condition and geographic position, the buffering deaerator can be designed to open containers or pond, can finish gas-water separation and solid impurity precipitation after designing former water like this and entering equally fully, and the gas after the separation escapes in the atmosphere automatically.She Ji advantage is the buffering deaerator that can belong to pressure vessel like this, saves the automatic exhaust steam valve that install buffering deaerator the top simultaneously.If automatic exhaust steam valve is installed, the CARX-I combined type rapid escape valve market price of a DN100 is about 2400 yuan.May need big many compared with the volume of the buffering deaerator that belongs to pressure vessel but shortcoming is the volume in designed open containers or pond.
The level gauging instrument of described buffering deaerator, regulator of level, Liquid level adjusting valve are formed level gauging and control loop.Can control suitable liquid level like this is free from foreign meter and single-phase flow gas phase with the water that guarantees that air water separates fully and flow out through the flowmeter metering from the buffering deaerator.The instrument of level gauging and control loop and variable valve can be selected various existing level gauging instrument, regulator or regulating system, variable valve for use according to user's economy and technical merit.
The flowmeter of described air water polyphasic flow water-carriage system measuring water flow device, can from the main flow flowmeter of existing various technology maturations, stipulate type selecting to the requirement of measuring accuracy according to the user by the instrument design type selecting, but must meet GB17167-2006 " energy unit energy measurement utensil is equipped with and the management general rule " permissible accuracy grade, if be used for the trade settlement metering, flowmeter in use must be forced to identify according to the provisions of the relevant regulations issued by the State simultaneously.
The pipeline section of flowmeter is housed on the outlet conduit of described air water polyphasic flow water-carriage system measuring water flow device, the design of pipeline section must be satisfied the installation specification and the standard of selected flowmeter, the construction and installation of pipeline section must meet GB 50093-2002 " instrument and meter for automation engineering construction and acceptance specification ", in the stable high-precision measuring of dependable flow.
The Liquid level adjusting valve of described air water polyphasic flow water-carriage system measuring water flow device is installed on the downstream of flowmeter.Can guarantee that like this liquid level of controlling the buffering deaerator makes the water that flows out from buffering deaerator lower pipeline not contain gas phase, guarantees that simultaneously the current attitude disorder that the variable valve throttling produces does not influence the flowmeter metering.
Described air water polyphasic flow water-carriage system measuring water flow device, the water inlet portion disposed thereon of buffering deaerator, water delivering orifice is arranged on its underpart, to guarantee the gas-water separation effect and to flow out the fluidised form that does not contain solid impurity and water outlet current in the water is stable laminar flow, thus dependable flow meter correct measurement.Described bottom is meant height 1/2nd following positions of buffering deaerator, but does not comprise the bottom of cushioning deaerator.
Described air water polyphasic flow water-carriage system measuring water flow device can also be established by-pass line, so that water delivery is uninterrupted during short time blowdown blocked operation.By-pass line can according to solid impurity in air content size, the water in the carrying capacity size of user's needs, the water what, the user is to the successional requirement of water delivery, design.
Described air water polyphasic flow water-carriage system measuring water flow device can be provided with two covers or overlap switchover operation arranged side by side or mutual more in the water-carriage system of measurement mechanism, guarantee that the water delivery continuity satisfies user's needs.Described two covers or overlap measurement mechanism arranged side by side more and can design the successional requirement of water delivery according to what, user of solid impurity in air content size, the water in the carrying capacity size of user's needs, the water.
These technical schemes also can make up mutually or combination, thereby reach better technique effect.
Air water polyphasic flow water-carriage system measuring water flow device of the present utility model, its principle is: former water enters from buffering deaerator top, enter the buffering deaerator by feed pipe, instant decompression gasification and rotational flow separation, sedimentation separation realize that the thorough separation of gas-liquid and solid impurity precipitate.Isolated gas is discharged automatically by vent valve; the solid-state foreign material that precipitate are manually removed by blowoff valve or mudhole; regulator of level is regulated the liquid level of buffering deaerator automatically by Liquid level adjusting valve; the thorough precipitation of guaranteeing to cushion in the former water in the deaerator of impurity is thoroughly separated with air water; the water that flows out from buffering deaerator lower pipeline is stable single-phase flow, guarantees the flowmeter accurate measurement.
By adopting technique scheme, the utlity model has following beneficial effect:
Adopt air water polyphasic flow water-carriage system measuring water flow device of the present utility model, resemble area, west, aforesaid Henan one large-scale stateowned enterprise water of productive use directly metering cause+12.59% and+17.67% error can be reduced to error range fully by the design's rule type selecting flow instrument.Area, west, Henan one large-scale stateowned enterprise water of productive use metering method is transformed according to the design, and the maximum head pressure of enterprise's water-carriage system is 93.8 meters * 1Kg/m
3=93.8Kg/m
2The buffering deaerator of this device can be selected the old pressure vessel that can demote in this enterprise and use for use, device can be installed on this factory water intaking take-off line own vacant lot along the line, procuring equipment Master Cost and executive cost, calculate according to local service fee norm, gross investment accounts for the very little part of annual water rate loss.
Description of drawings
Fig. 1 is a kind of air water polyphasic flow water-carriage system measuring water flow device process flow diagram of this patent.
Fig. 2 is the process flow diagram that a kind of air water polyphasic flow water-carriage system measuring water flow device of this patent uses opening buffering deaerator.
Fig. 3 is the measurement mechanism two cover parallel running process flow diagrams of this patent.
Fig. 4 is a kind of air water polyphasic flow water-carriage system measuring water flow device practical application process flow diagram of this patent.The flowmeter that this user is former to be installed in-3 meters the trench is removed, and the mouth of pipe is blind dead before and after the former flowmeter, and former water just enters to guide to the face of land and returns original undertaking's aqueduct by air water polyphasic flow water-carriage system measuring water flow device, takes up an area of 30 meters of 5 meters *.
Fig. 5 is the another kind of process flow diagram of a kind of air water polyphasic flow water-carriage system measuring water flow device practical application of this patent.Different with Fig. 4 is, there be water and the unsettled situation of water consumption size of being interrupted in this user, and this user is utilizable vacant lot deficiency near the nearer aqueduct of plant area, this user is unwilling to increase newly the buffering deaerator that belongs to pressure vessel again, select to use the opening pond to make the buffering deaerator, or not liquid level height overflow of water for guaranteeing the opening pond like this because of causing for the water fluctuations in discharge, specially the inlet at open containers increases by 13 former water regulating valves, 13 former water regulating valves are controlled by 6 regulator of level, liquid level when the opening pond reaches high limit, such as 90% o'clock, automatic adjusting was closed this valve and is stopped former water supply.
Among the figure, 1 is the buffering deaerator, and 2 is vent valve, 3 is blowoff valve or mudhole, 4 is flowmeter, and 5 is Liquid level adjusting valve, and 6 is regulator of level, 7 is feed pipe and pair line thereof, 8 is transfer valve, and 9 is former supply channel, and 10 is the measuring instrument of former pipeline, 11 and 12 blind plates for increase, 13 is control signal wire.
Embodiment
As shown in Figure 4, air water polyphasic flow water-carriage system measuring water flow device is made up of following parts: buffering deaerator 1, vent valve 2, blowoff valve or mudhole 3, flowmeter 4, Liquid level adjusting valve 5, regulator of level 6, feed pipe and pair line 7 thereof, transfer valve 8.
The separation method that the buffering deaerator adopts is rotational flow separation air water and gravity settling separation solid impurity, the diameter D of buffering deaerator 1 is DN3000mm, caliber DN600mm greater than feed pipe and pair line 7 thereof, buffering deaerator 1 is installed on the ground on former underground aqueduct next door, vent valve 2 is selected CARX-I combined type rapid escape valve for use, its pressure rating is PN1.0, and bore is DN100, and flowmeter 4 is DN450 electromagnetic flowmeter and flow computer.
As Fig. 4, this device is installed on the former hydraulic pipeline of user side, former water is drawn ground from the water pipe of former underground DN600, enter buffering deaerator 1 by feed pipe 7, in buffering deaerator 1, finish solid matter precipitation and gas-liquid separation, the gas that sub-argument goes out is discharged automatically by vent valve 2, and the solid impurity of precipitation is regularly manually removed by blowoff valve or mudhole 3.Do not interrupt for ensureing to supply water, when removing solid-state foreign material, former water pays line 7 by feed pipe and transfer valve 8 switches, and will cushion deaerator 1 short time isolation from water-carriage system, former water is by paying the circulation of line short time, by blowoff valve or the mudhole 3 artificial solid-state foreign material that settle down of removing.Regulator of level 6 is according to buffering deaerator 1 inner liquid level height output regulation signal; automatically regulate the liquid level that cushions in the deaerator 1 by Liquid level adjusting valve 5; the thorough precipitation of guaranteeing to cushion in the former water in the deaerator 1 of impurity is thoroughly separated with air water; keep in the buffering deaerator 1 certain liquid level being arranged simultaneously; guarantee from the water of buffering deaerator 1 bottom, not contain gas phase and solid impurity; making the water that flows through flowmeter 4 meterings is stable single-phase flow, guarantees flowmeter 4 accurate measurements.
As shown in Figure 5, air water polyphasic flow water-carriage system measuring water flow device, form by following parts: buffering deaerator 1, blowoff valve or mudhole 3, flowmeter 4, Liquid level adjusting valve 5, regulator of level 6, feed pipe and pair line 7 thereof, transfer valve 8, Liquid level adjusting valve 13.
The separation method that buffering deaerator 1 adopts is a gravity separation, the diameter D of buffering deaerator 1 is DN4500mm, greater than the caliber DN600mm of feed pipe and pair line 7 thereof, buffering deaerator 1 is installed on the former hydraulic pipeline of user side, and flowmeter 4 is DN450 electromagnetic flowmeter and flow computer.
As Fig. 5, former water is drawn ground from the water pipe of former underground DN600, enter buffering deaerator 1 by feed pipe 7, in buffering deaerator 1, finish solid matter precipitation and gas-liquid separation, isolated gas escapes into atmosphere naturally from the opening pond, and the solid impurity of precipitation is regularly manually removed by blowoff valve or mudhole 3.Do not interrupt for ensureing to supply water, when removing solid-state foreign material, former water pays line 7 by feed pipe and transfer valve 8 switches, and will cushion deaerator 1 short time isolation from water-carriage system, former water is by paying the circulation of line short time, by blowoff valve or the mudhole 3 artificial solid-state foreign material that settle down of removing.Regulator of level 6 is according to buffering deaerator 1 inner liquid level height output regulation signal; automatically regulate the liquid level that cushions in the deaerator 1 by Liquid level adjusting valve 5 and Liquid level adjusting valve 13; guarantee to cushion under the prerequisite of deaerator 1 not overflow; impurity in the former water thoroughly precipitation thoroughly separates with air water; keep in the buffering deaerator 1 certain liquid level being arranged simultaneously; guarantee from the water of buffering deaerator 1 bottom, not contain gas phase and solid impurity; making the water that flows through flowmeter 4 meterings is single-phase flow, guarantees flowmeter 4 accurate measurements.
The error in dipping of embodiment 1,2:
Es＝±(0.5
2+0.1
2)
1/2％＝±0.509％
This error meets GB17167-2006 " energy unit energy measurement utensil is equipped with and the management general rule " permissible accuracy grade.
With west area, Henan one large-scale stateowned enterprise water of productive use directly metering cause+12.59% compare obviously minimizing with+17.67% error.The minimum minimizing about 2,000,000 yuan of corresponding annual water gauging loss.
Claims (8)
1. an air water polyphasic flow water-carriage system measuring water flow device is characterized in that: comprise buffering deaerator (1), Liquid level adjusting valve (5), regulator of level (6), flowmeter (4), level gauging instrument; Buffering deaerator (1) comprises the automatic exhaust steam valve (2) that is installed on its top, is installed on blowoff valve or mudhole (3), the level gauging instrument that is mounted thereon of its bottom, is installed on flowmeter (4) and Liquid level adjusting valve (5) on the outlet conduit of its underpart, and Liquid level adjusting valve (5) is installed on the downstream of flowmeter (4); The pulpit can be installed or be installed on to regulator of level (6) on the spot; Level gauging instrument and regulator of level (6), Liquid level adjusting valve (5) are realized the signal transmission by cable.
2. according to the described air water polyphasic flow of claim 1 water-carriage system measuring water flow device, it is characterized in that: described flowmeter (4) comprises secondary instrument, and the pulpit can be installed or be installed on to secondary instrument on the spot.
3. according to the described air water polyphasic flow of claim 1 water-carriage system measuring water flow device, it is characterized in that: described buffering deaerator (1) diameter D greater than the caliber of feed pipe.
4. according to claim 1,2 or 3 each described air water polyphasic flow water-carriage system measuring water flow devices, it is characterized in that: the below of described buffering deaerator (1) is provided with sewage draining exit, and blowoff valve or mudhole (3) are installed.
5. according to claim 1,2 or 3 each described air water polyphasic flow water-carriage system measuring water flow devices, it is characterized in that: described buffering deaerator (1) can be designed to open containers or pond.
6. according to the described air water polyphasic flow of claim 1 water-carriage system measuring water flow device, it is characterized in that: the water inlet portion disposed thereon of described buffering deaerator (1), water delivering orifice is arranged on the non-lower portion of its underpart.
7. according to the described air water polyphasic flow of claim 1 water-carriage system measuring water flow device, it is characterized in that: measurement mechanism also is provided with by-pass line so that during the short time blowdown during blocked operation water delivery uninterrupted.
8. according to the described air water polyphasic flow of claim 1 water-carriage system measuring water flow device, it is characterized in that: two covers are set in the water-carriage system of measurement mechanism or overlap switchover operation arranged side by side or mutual more, guarantee that the water delivery continuity satisfies user's needs.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784050A (en) * | 2014-12-24 | 2016-07-20 | 西安北斗星数码信息股份有限公司 | Water meter with purification function |
| CN107121177A (en) * | 2017-06-20 | 2017-09-01 | 环境保护部华南环境科学研究所 | Open channel and conduit wastewater flow integral standard device |
| CN113668668A (en) * | 2021-09-09 | 2021-11-19 | 上海双骏环保科技有限公司 | Self-driven quasi-single-phase flow vacuum drainage system |
| CN117346867A (en) * | 2023-11-17 | 2024-01-05 | 江苏长三角智慧水务研究院有限公司 | A flow meter calibration method, calibration experiment platform, device and equipment |
-
2010
- 2010-05-31 CN CN2010202076394U patent/CN201787986U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784050A (en) * | 2014-12-24 | 2016-07-20 | 西安北斗星数码信息股份有限公司 | Water meter with purification function |
| CN107121177A (en) * | 2017-06-20 | 2017-09-01 | 环境保护部华南环境科学研究所 | Open channel and conduit wastewater flow integral standard device |
| CN113668668A (en) * | 2021-09-09 | 2021-11-19 | 上海双骏环保科技有限公司 | Self-driven quasi-single-phase flow vacuum drainage system |
| CN117346867A (en) * | 2023-11-17 | 2024-01-05 | 江苏长三角智慧水务研究院有限公司 | A flow meter calibration method, calibration experiment platform, device and equipment |
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