CN103091376A - On-line constant liquid flow velocity analyzing and monitoring device - Google Patents
On-line constant liquid flow velocity analyzing and monitoring device Download PDFInfo
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- CN103091376A CN103091376A CN2013100156941A CN201310015694A CN103091376A CN 103091376 A CN103091376 A CN 103091376A CN 2013100156941 A CN2013100156941 A CN 2013100156941A CN 201310015694 A CN201310015694 A CN 201310015694A CN 103091376 A CN103091376 A CN 103091376A
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Abstract
The invention discloses an on-line constant liquid flow velocity analyzing and monitoring device which comprises a constant flowing device, a measuring device and a water discharging tube which are serially connected with one another, wherein the top part of a constant flower shell in the constant flowing device is sealed; through holes are formed in the bottom of the constant flower shell; hollow tubular overflowing tubes are connected with the through holes in a sealing manner and are extended to the inside of the constant flower shell; and the bottoms of the overflowing tubes are communicated with a discharging tube. The on-line liquid constant flow velocity analyzing and monitoring device is simple in structure, enables the flow velocity of liquid flowing through a sensor to be constant, does not change along with the pressure of a pipeline, ensures that the change of ingredients in the fluid is objectively and accurately revealed through on-line detection data, prolongs the service life of the sensor and improves the measurement precision of the sensor.
Description
Technical field
The present invention relates to a kind of measurement mechanism of analyzing liquid sample, particularly a kind ofly be applicable to the sample analysis measurement mechanism in liquid real-time online detection system in commercial production.
Background technology
Fluid online chemical analysis technology is the new industry that obtains nearly ten years fast development, general people pay close attention to the technical barriers such as non electrical quantity/electric weight conversion, chemical reagent, sensor technology and mathematical model, under laboratory condition, use existing on-line analysis measurement mechanism usually can obtain more satisfied experiment effect, just there will be some problems but the measurement mechanism in laboratory is applied in to industry spot, is mainly the impact that sensor that instrument uses is vulnerable to the detected fluid flow velocity.Because the line pressure of site of deployment is random variation, cause the flow velocity of flows through sensor constantly to change, and the unstable accuracy of measuring numerical value that will directly affect of flow velocity, and this error is difficult for calculating compensation.
For continuous on-line measurement device, stablize the measure of flow velocity for utilizing needle-valve carry out manual adjustments or utilize reduction valve automatically to regulate.But the pressure that under field condition, manually metering pin valve can't follow up random changes, and easily causes the fluctuation of measurement data.Therefore the pressure of reduction valve stably measured one side that uses changes more at present, but measurement mechanism is vulnerable to the deposition of impurity in water source and the impact of burn into corrosion, make reduction valve be easy to lose efficacy, and reduction valve can only be applied to the variation of level and smooth liquid stream, can not in very wide pressure range, ensure when water outlet constant flow rate, especially pressure are low and can't open reduction valve at all.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of online chemical analysis device that can keep the liquid constant flow velocity, and this device make to flow through liquid flowing speed of sensor is constant, with line pressure, does not change, thereby ensures that measurement data is objective, accurate.
Technical matters of the present invention realizes with following technical proposals:
A kind of liquid constant flow velocity on-line analysis monitoring device, it comprises constant-current device, measurement mechanism and the drainpipe of mutual serial connection; Described constant-current device comprises galvanostat housing and run-down pipe, wherein, the top seal of galvanostat housing, bottom arranges through hole; Run-down pipe is arranged in the galvanostat housing, and it is shaped as hollow tubular, and run-down pipe and described through hole are tightly connected, and its bottom is communicated with drainpipe.
Aforesaid liquid constant current speed on-line analysis monitoring device, described measurement mechanism is comprised of the first liquid flow measurement groove and the second liquid flow measurement groove, between two liquid flow measurement grooves, by moulding the pipe IV, connect, the survey sensor fixing by connector is installed in liquid flow measurement groove, and liquid flow measurement trench bottom is communicated to drainpipe.
Aforesaid liquid constant current speed on-line analysis monitoring device, the position of described survey sensor probe arranges collecting tray, and collecting tray is arranged in the first liquid flow measurement groove, and it is shaped as funnel-form, and the survey sensor probe is surrounded by funnel.
Aforesaid liquid constant current speed on-line analysis monitoring device, be provided with float in described the second liquid flow measurement groove, and top is sealed by plug; Described float is the gyroscope-like hollow structure.
Aforesaid liquid constant current speed on-line analysis monitoring device, the top of described galvanostat housing is by the galvanostat top seal, and the sidewall upper limb of galvanostat housing arranges deaeration pipe, and deaeration pipe one end passes in run-down pipe, and the other end is communicated to the top of measurement mechanism.
Aforesaid liquid constant current speed on-line analysis monitoring device, it also is provided with a filtration unit, and described filtration unit consists of filter body, cartridge filter and filter core; Wherein, an end of described filter body is inlet, and the other end is connected with constant-current device; The filter core fixing by cartridge filter is set in described filter body; The top of filter body is by the sealing of filtrator top cover, and bottom is communicated to drainpipe.
The present invention has been owing to having adopted technique scheme, solved in solution is measured solution flow rate, pressure, impurity, the bubble adverse effect to solution electrochemistry measurement accuracy and precision.Make the on-line analysis device realize the control of convection cell constant speed, constant voltage, guarantee science and the reliability of data acquisition in production run.
The present invention samples through bypass, solution at first by filtrator by most of impurity filtering, then flow into the surge chamber decompression in constant-current device, constant-current device internal pressure and atmospheric pressure are consistent, sampling solution is cushioned at this, reduces sample pressure or accumulates certain potential energy, if flow rate of liquid is too fast, flow is excessive, in surge chamber, over after the overflow vent on run-down pipe top, flowing into drainpipe, guiding system remains that the liquid level in surge chamber is constant to liquid level like this.Again because the bore of run-down pipe much larger than the pipe of moulding of sample introduction, through tight scientific experiment with calculate sample introduction to mould pipe be the best with the ratio of run-down pipe internal diameter in the scope of 1:3～5, thereby guaranteed that unnecessary liquid smoothly outside discharger, finally realizes the purpose of constant current via drainpipe.
Due to the liquid level difference between surge chamber and measurement mechanism, liquid flows into the next stage measurement mechanism by self gravitation from water delivering orifice, flowing into the moulding under mouth of pipe footpath and the definite condition of length of pipe of measurement mechanism, in constant-current device, constant liquid level has just determined the constant flow rate of fluid in the sensor, realization remains in a constant pressure and flow rates from the solution of the water delivering orifice outflow of constant-current device, thereby guarantees the reliable, stable of measurement data.In extreme test in pipeline when flow velocity and pressure generation transient change float be slight variations, can prove that constant-current device plays good insulation blocking effect.All device is regulated automatically, does not need artificial adjusting, can extend sensor serviceable life, improves measuring accuracy.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is principle of the invention schematic diagram
Fig. 3 is the structural representation of filtration unit;
Fig. 4 is the structural representation of constant-current device;
Fig. 5 is the structural representation of measurement mechanism.
In figure, each list of reference numerals is: 1, filtration unit, 1-1, filter body, 1-2, filter core, 1-3, cartridge filter, 1-4, the filtrator top cover, 1-5, filter water check valve, 1-6, mould the pipe I, 2, constant-current device, 2-1, mould the pipe III, 2-2, deaeration pipe, 2-3, run-down pipe, 2-4, the galvanostat top cover, 2-5, pipe connecting piece, 2-7, the galvanostat housing, 3, measurement mechanism, 3-1, plug, 3-2, mould the pipe IV, 3-3, float, 3-4, the second liquid flow measurement groove, 3-5, survey sensor, 3-6, connector, 3-7, water check valve, 3-8, collecting tray, 3-9, deaeration pipe, 3-10, the first liquid flow measurement groove, 4, mould the pipe II, 5, drainpipe.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, 2, the present invention includes filtration unit 1, constant-current device 2, measurement mechanism 3, three partial devices is screwed on substrate respectively.Filtration unit 1 is arranged on sample bypass foremost, and constant-current device 2 is arranged on the next stage of filtration unit 1, and measurement mechanism 3 is installed on the afterbody of bypass.Between three partial devices, by 1/4, " white is moulded pipe and is communicated with.During sampling, liquid enters filtration unit 1 by moulding pipe I 1-6, and filter liquor enters constant-current device 2 by moulding pipe II 4, filters the waste liquid produced and discharges by drainpipe 5.Flow into measurement mechanism 3 and measured through moulding pipe III 2-1 at the fluid of the interior formation constant voltage of constant-current device 2, constant speed, the overflowing liquid of generation enters drainpipe 5 along run-down pipe 2-3, is connected the formation exhaust channel between constant-current device 2 and measurement mechanism 3 by deaeration pipe.The liquid flowed out from measurement mechanism 3 enters drainpipe 5 through moulding pipe IV 3-2.
The present invention is provided with deaeration pipe, form the exhaust channel of measurement mechanism, this is because the decompression suddenly in galvanostat of liquid stream, gas molecule in solution can be assembled and discharge slowly, and the composition of gas and solution compolision differ widely, if the accuracy of the measured value that has bubble to affect around the sensor sensing measure portion, guide to galvanostat so the measuring flume top arranges the gas that deaeration pipe will be discharged in measuring flume, and galvanostat with atmosphere, communicate will be by the gas Natural excrement.
As shown in Figure 3, filtration unit 1 comprises filter body 1-1, filter core 1-2, cartridge filter 1-3, filters water check valve 1-5, filtrator top cover 1-4, moulds pipe I 1-6, there is filter chamber filter body 1-1 inside, and there are two fixed orifices at the outside back side, by pipe connecting piece and "O"-ring, is fixed on substrate.Filter core 1-2 is installed in the filter chamber of filter body 1-1 inside, rely on cartridge filter 1-3 chucking fixing, the bottom of filter body 1-1 is installed and is filtered water check valve 1-5 and be switched to drainpipe 5, the top of filter body 1-1 and filtrator top cover 1-4 by "O"-ring be threaded.
As shown in Figure 4, constant-current device 3 comprises galvanostat housing 2-7, run-down pipe 2-3, galvanostat top cover 2-4, pipe connecting piece 2-5, moulds pipe III 2-1, deaeration pipe 2-2, moulds pipe fixture 2-6, the top seal of galvanostat housing 2-7, bottom arranges through hole, positive both sides have two fixed orifices to rely on screw to be fixed on substrate, the upper end of the run-down pipe 2-3 made by organic glass enters the galvanostat enclosure interior from the hole depth of galvanostat housing 2-7 bottom, extend to suitable length, junction is by polymer adhesive, and the lower end of run-down pipe 2-3 access drainpipe 5 forms overflow ducts.Galvanostat top cover 2-4 is fixed in galvanostat housing 2-7 top by bonding agent.The pipe II 4 of moulding be connected with filtration unit 1 is installed in the through hole of galvanostat housing 2-7 both sides by pipe connecting piece 2-5 respectively with the pipe III 2-1 that moulds be connected with measurement mechanism 3, forms the path of the turnover of fluid.Deaeration pipe 2-2 mono-end of being made by teflon is connected in the through hole of galvanostat housing 2-7 side by moulding pipe fixture 2-6, and the other end is connected in the first liquid flow measurement groove 3-10, forms the exhaust channel of measurement mechanism 3.
As shown in Figure 5, measurement mechanism 3 comprises the first liquid flow measurement groove 3-10, the second liquid flow measurement groove 3-4, plug 3-1, connector 3-6, float 3-3, collecting tray 3-8, moulds pipe IV 3-2, measures water check valve 3-7, survey sensor 3-5, the first liquid flow measurement groove 3-10 and the second liquid flow measurement groove 3-4 rely on respectively screw to be fixedly attached on substrate by two holes in front, each liquid flow measurement groove side arranges respectively position, two holes, moulds pipe IV 3-2 and closely is connected with liquid flow measurement groove with "O"-ring by pipe connecting piece in the position, hole respectively.Be in turn connected to form import and the outlet in water route between two liquid flow measurement grooves.The top of liquid flow measurement groove has the position, hole, wherein survey sensor 3-5 can be set, the plug 3-1 and the connector 3-6 that are installed on room are selectable unit, by connector 3-6 and airtight connection of liquid flow measurement groove, by being installed, plug 3-1 guarantees the leakproofness of liquid flow measurement groove when sensor installation not when installing and measuring sensor 3-5.Position, a hole is arranged at the top of the first liquid flow measurement groove 3-10, for an end that connects constant-current device 2 deaeration pipe 3-9, forms exhaust channel.Two measuring chambers in left and right are set in the first liquid flow measurement groove 3-10, and left measuring chamber is installed chlorine residue/chlorine dioxide sensor, right measuring chamber mounting temperature sensor, and collecting tray 3-8 is installed on the probe place of chlorine residue/chlorine dioxide sensor.Two measuring chambers in left and right are set in the second liquid flow measurement groove 3-4, and float 3-3 is installed on left measuring chamber for observing flow rate of liquid, and right measuring chamber is installed the pH survey sensor.Measure the bottom communicated drainage pipe 5 that water check valve 3-7 is installed on the first liquid flow measurement groove 3-10 and the second liquid flow measurement groove 3-4.
Float in the present invention is the gyroscope-like hollow structure, can swim on the water surface, can fluctuate with the variation of liquid flowing speed, except playing stabilization, its be placed in measuring flume make the liquid flowing speed situation of change more directly perceived.
Below principle of work of the present invention is described further:
By moulding pipe I 1-6 water sampling, after inflow filter 1, through the filtration of filter core 1-2, filtrate flows into constant-current device 2 by moulding pipe II 4, and discarded water water check valve 1-5 after filtration flows into drainpipe 5, water sample collects in constant-current device 2 inside, and keeps constant liquid level.If the too fast flow of flow velocity is excessive, in surge chamber, liquid level surpasses the top overflow vent of run-down pipe 2-3, will flow into run-down pipe 2-3 and guiding system, water in surge chamber is because liquid level difference flows into measurement mechanism 3 by self gravitation from moulding pipe III 2-1, thereby the water sample that realization is flowed out remains in a constant pressure and flow rates.At first the water sample flowed in measurement mechanism 3 passes through the survey sensor 3-5 in the right measuring chamber of the first liquid flow measurement groove 3-10, pass through collecting tray 3-8 when entering left measuring chamber, collecting tray 3-8 collects the liquid flow through in measuring chamber, the liquid footpath of circulating is diminished and makes liquid accelerate to pass through sensor probe, the impact that the precision of practical chlorine residue/chlorine dioxide sensor can be measured solution flow rate herein, arrange collecting tray to improve measuring accuracy.Bubble in liquid can be assembled and be expelled to constant-current device 2 by deaeration pipe 3-9 at the first liquid flow measurement groove 3-10 top.Liquid flows into the second liquid flow measurement groove 3-4 from the first liquid flow measurement groove 3-10 by moulding pipe IV 3-2, flow into left measuring chamber and promote the flow velocity of float 3-3 with liquid in reactive system intuitively in the second liquid flow measurement groove after the measurement of survey sensor 3-5 in right measuring chamber, finally by moulding pipe IV 3-2, flow into drainpipe 5, when system closing, can discharge unnecessary liquid in measuring chamber by the measurement water check valve 3-7 of liquid flow measurement trench bottom.
The inlet that filtration unit is connected with pipeline has adopted small-bore flexible pipe, avoided sample to lag behind because of the measurement that transmission causes, Open Side Down for filter core, held back particle larger in the fluid, and along with continuous gathering gravity increases, and be deposited on the bottom of filtration unit, can be discharged by the filtration water check valve of opening at any time bottom.
In two liquid flow measurement grooves, chlorine residue/chlorine dioxide sensor, pH survey sensor, temperature sensor and suspended body flowmeter have been installed respectively in measurement mechanism.In pipeline, the circulation style of fluid guarantees that the measurement mechanism inner sensor is immersed in water body all the time; Device has designed the installation screw thread with various sensor matching, and keeps the convenience of its dismounting and change and maintenance; The indicating device wherein formed from gravity-type flow float and indicating graduation makes flow velocity intuitively, thereby makes device have the visuality of flow velocity.Dissolved gas in fluid can discharge gas when pressure reduces to rise with temperature, the accumulation in time of these gases can be full of measuring chamber, because the composition of gas differs widely with the composition of measuring liquid, if around the sensor measurement part, bubble is arranged, can affect the accuracy of measured value, so must discharge.This device utilizes the thin pneumatics power that in the surge chamber of constant-current device, overflow produces, and makes gas along the deaeration pipe discharge measuring chamber directly is connected with constant-current device, the normal operation of guarantee sensor.Drained by the measurement water check valve of opening below when the tiny particle of the inner appearance of measurement mechanism gathers, or carried out debugging operations in case of necessity.
The drainpipe of larger caliber is by the debugging of all each points and move the outside that current are gathered the discharge system.
Whole system can be fixed on wall or form a whole system in rack by substrate, and installation is very convenient.
Claims (6)
1. a liquid constant flow velocity on-line analysis monitoring device, is characterized in that, it comprises constant-current device (2), measurement mechanism (3) and the drainpipe (5) of mutual serial connection; Described constant-current device (2) comprises galvanostat housing (2-7) and run-down pipe (2-3), wherein, the top seal of galvanostat housing (2-7), bottom arranges through hole; Run-down pipe (2-3) is arranged in galvanostat housing (2-7), and it is shaped as hollow tubular, and run-down pipe and described through hole are tightly connected, and run-down pipe (2-3) bottom is communicated with drainpipe (5).
2. liquid constant flow velocity on-line analysis monitoring device according to claim 1, it is characterized in that, described measurement mechanism (3) is comprised of the first liquid flow measurement groove (3-10) and the second liquid flow measurement groove (3-4), moulding pipe (3-2) by the 4th between two liquid flow measurement grooves connects, the survey sensor (3-5) fixing by connector (3-6) is installed in liquid flow measurement groove, and liquid flow measurement trench bottom is communicated to drainpipe (5).
3. liquid constant flow velocity on-line analysis monitoring device according to claim 2, is characterized in that, the position of described survey sensor (3-5) probe arranges collecting tray (3-8); Described collecting tray is arranged in the first liquid flow measurement groove, and it is shaped as funnel-form, and the survey sensor probe is surrounded by funnel.
4. liquid constant flow velocity on-line analysis monitoring device according to claim 3, is characterized in that, in described the second liquid flow measurement groove (3-4), is provided with float (3-3), and top is sealed by plug (3-1); Described float is the gyroscope-like hollow structure.
5. liquid constant flow velocity on-line analysis monitoring device according to claim 4, it is characterized in that, the top of described galvanostat housing (2-7) is sealed by galvanostat top cover (2-4), the sidewall upper limb of galvanostat housing (2-7) arranges deaeration pipe (2-2), deaeration pipe (2-2) end passes in run-down pipe, and the other end is communicated to the top of measurement mechanism (3).
6. according to claim 1,2,3,4 or 5 described liquid constant flow velocity on-line analysis monitoring devices, it is characterized in that, it also is provided with a filtration unit (1), and described filtration unit consists of filter body (1-1), cartridge filter (1-3) and filter core (1-2); Wherein, an end of described filter body is inlet, and the other end is connected with constant-current device; The filter core (1-2) fixing by cartridge filter (1-3) is set in described filter body; The top of filter body (1-1) is by filtrator top cover (1-4) sealing, and bottom is communicated to drainpipe (5)
.
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| CN201310015694.1A CN103091376B (en) | 2013-01-16 | 2013-01-16 | A kind of liquid constant flow velocity on-line analysis monitoring device |
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| CN201310015694.1A CN103091376B (en) | 2013-01-16 | 2013-01-16 | A kind of liquid constant flow velocity on-line analysis monitoring device |
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| CN103091376B CN103091376B (en) | 2015-08-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103455050A (en) * | 2013-09-11 | 2013-12-18 | 江西稀有金属钨业控股集团有限公司 | Double-balance-floater flow controller |
| CN103743686A (en) * | 2013-12-30 | 2014-04-23 | 金川集团股份有限公司 | Online titanium tetrachloride cleanliness detection system |
| CN107335255A (en) * | 2017-08-18 | 2017-11-10 | 河北科瑞达仪器科技股份有限公司 | Water route air-vent |
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| CN203053910U (en) * | 2013-01-16 | 2013-07-10 | 河北科瑞达仪器科技股份有限公司 | Online liquid constant flow velocity analysis monitoring device |
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| CN201366279Y (en) * | 2008-12-30 | 2009-12-23 | 张明亮 | Straight-through pipeline filter |
| CN201368859Y (en) * | 2009-03-03 | 2009-12-23 | 边东福 | Multi-passage sodion monitor |
| CN201795943U (en) * | 2010-07-30 | 2011-04-13 | 成都新三可仪器有限公司 | Sample water alkalifying system and industrial online sodium degree instrument using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103455050A (en) * | 2013-09-11 | 2013-12-18 | 江西稀有金属钨业控股集团有限公司 | Double-balance-floater flow controller |
| CN103743686A (en) * | 2013-12-30 | 2014-04-23 | 金川集团股份有限公司 | Online titanium tetrachloride cleanliness detection system |
| CN107335255A (en) * | 2017-08-18 | 2017-11-10 | 河北科瑞达仪器科技股份有限公司 | Water route air-vent |
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| CN103091376B (en) | 2015-08-19 |
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