CN1139209A - Fluid-detecting measuring device - Google Patents
Fluid-detecting measuring device Download PDFInfo
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- CN1139209A CN1139209A CN 95111090 CN95111090A CN1139209A CN 1139209 A CN1139209 A CN 1139209A CN 95111090 CN95111090 CN 95111090 CN 95111090 A CN95111090 A CN 95111090A CN 1139209 A CN1139209 A CN 1139209A
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- measuring tube
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Abstract
The two-phase fluid-detecting measuring device for detecting density, flow rate, flow speed and yield consists of electromechanical sensing unit and instrument. The sensing unit with on-line continuous dynamic weighing structure mainly consists of measuring tube serially connected in pipeline and electromagnetical sensor, and specifically includes elastic union, measuring tube, micromotor dynamometric and other parts. The instrument consists of Z80 CPU-controlled system unit and power supply unit. As a convenient and practical one, the said fluid-detecting measuring device is used in pipeline transport of mud, paper pulp, hydraulic mining fluid and chemical solution.
Description
The present invention relates to measure the device of two or more variablees, be meant especially and a kind ofly can realize, improve production management, the concentration that can show two-phase fluid, flow velocity, flow, output and working time and can print the detection measuring apparatus of output and working time data the production scene timing monitoring.
In the continuous conduit of solid-liquid or liquid-liquid diphasic flow body was carried, for example the continuous conduit of mud, paper pulp, hydromine and chemical industry solutions was carried, and concentration, flow and the output to fluid-mixing has detection and control requirement at large.Existing detection to two-phase fluid concentration, general both at home and abroad employing radioactive ray or various ripple penetrate pipeline or detect by the pipeline reflected refraction, but these methods are subjected to character, shape, size and the liquid distribution situation in fluid such as liquid, and the influence of many-sided factor such as material of fluid-mixing flow velocity, pipeline, diameter, exist the defective that can not guarantee accuracy of detection, thereby limited the territory of its use greatly.Especially at home most of occasions still adopt the method for estimation to the control of concentration and flow, often adopt as the calculating of the workload of hog barge and plug in mark post etc. and measure method, and it is very backward to detect measurement means, does not catch up with the requirement of engineer operation far away.
Purpose of the present invention just is to change the backward situation that traditional two-phase fluid pipeline transportation detects metering, provide the online continuous dynamic weighing method of a kind of employing fluid to detect two-phase fluid, can overcome temperature drift, time drift, hydrodynamic pressure and vibration two-phase fluid pipe detection measuring apparatus the accuracy of detection influence.This device can show the controlling index such as concentration, flow velocity, flow, output and working time of two-phase fluid, production run is effectively controlled, and then improves production management.
Two-phase fluid pipe detection measuring apparatus of the present invention is made of dynamo-electric sensing detection device and instrument.
Dynamo-electric sensing detection device adopts online continuous dynamic weighing structure, by being serially connected in ducted measuring tube and dynamo-electric transducing part is formed, its longitudinal length along pipeline is about 2000mm, comprises parts such as elastomeric joint, measuring tube, outer tube, pressure transducer, ultrasonic flow velocity probe, wire rope, following lever, upper lever, balance foundary weight, eccentric wheel, micromotor, force cell.Measuring tube is provided with outer tube, is marked with the antifreeze press water that has added anti freezing solution between the inner and outer pipes, in order to the pressure of balance elasticity joint area fluid.Measuring tube is connected with fixed-piping by the elastomeric joint at two ends, pressure transducer is installed on the preceding fixed-piping of front end elastomeric joint, ultrasonic flow velocity probe is installed on the first half of measuring tube, the two ends of measuring tube link to each other with two levers up and down of portion fixed thereon respectively by two wire rope, the wire rope of front end connects the front end of lever down, the rear end of following lever be bearing in upper lever middle part below, the front end of upper lever is balance foundary weight, eccentric wheel and micromotor, its rear end links to each other with the wire rope of measuring tube rear end, and force cell also is housed on the upper lever.When carrying out work, the fluid measuring tube of flowing through, make fluid weight in the measuring tube also along with change owing to concentration constantly changes, to sensor and convert electric signal to, electric signal passes to the control display instrument by cable by wire rope and lever transmission in this variation.According to the linear principle of weight change of institute's weighing in volumetric concentration and the measuring tube, then just can continuously, dynamically detect with fluid-mixing in the voltage signal that is directly proportional of concentration concentration mutually.Ultrasonic flow velocity probe by being adsorbed on measuring tube can test fluid flow velocity.Flow through the required time of measuring tube according to the fluid momentum area that obtains from force cell and equivalent length and fluid-mixing, can measure the volumetric production of concentration phase material.For the concentration that prevents to be caused by temperature drift and time drift detects error, dynamo-electric sensing detection device has adopted by micromotor, the compensation mechanism of unloading in short-term that eccentric wheel and force cell constitute, by the control micromotor eccentric wheel is rotated, for example per hour rotate a circle, because eccentric wheel resets after rotating upper lever balance foundary weight one end being depressed by trace immediately, thereby make force cell unloading a moment (a few approximately second), at this moment still by the output that unloads during preceding instantaneous fluid concentrations measures unloading, this stabiloity compensation can be similar to regards online compensation as to control program.In order to overcome of the influence of factors such as vibration, swing and impact and fluid flow and working pressure pulsation to accuracy of detection, except adopting the microcomputer data processing technology, in dynamo-electric sensing detection device, pivot weight can be set, under programmed control,, proofread and correct weighting error by comparing with pivot weight.Pressure transducer passes to instrument with measured fluid pressure signal, by routine processes, in order to the influence of compensator fluid pressure to sense weight.
Instrument is made up of mainframe box and power supply box, and power supply box is positioned at the mainframe box top.The power supply box panel is provided with voltage table, voltage-regulation knob, power switch, interface and microcomputer switch, current meter switch, moving instrument switch, memory switch and the corresponding pilot lamp etc. of answering; Be covered with power supply input and output mouth and memory and control line interface behind the power supply box; External power supply input power supply box produces each operating voltage through AC voltage regulator, isolating transformer, low-pass filtering, DC converting etc. and supplies with main frame.The mainframe box panel is provided with two groups of digital display pipes, zero-setting button, reset button, printer exit slot, concentration, output/flow, time, printing four key switchs, concentration signal indication, pressure signal indication, " in memory or reset " toggle switch, work or debugging toggle switch, stabiloity compensation toggle switch, full matrix identification toggle switch, pressure compensation toggle switch, accumulative total is printed zero clearing toggle switch and corresponding display lamp etc.Three figure places show pipe and show flow velocity, six figure places show pipe display density, output/flow, working time, instrument provides the electric current output interface of concentration and flow velocity, has concentration, emergent automatic printing function and master data long-term memory function when flow velocity transfinites sound and light of alarm, power failure or shutdown.Main frame is controlled by Z80CPU, has adopted the moving instrument circuit of answering of improved CDJ-II type ultrasonic Doppler tachometer circuit and YD-15 type.Three buses of CPU all have the bus driver impact damper, and wherein the data bus driving circuit allows interrupt operation; The digital demonstration adopts static the demonstration to increase display brightness; A/D and D/A converter and relay I/O circuit are the photoelectricity coupling; Be provided with total line filter, make the microcomputer performance meet the requirement of industrial computer.Be to eliminate the influence of vibration to accuracy of detection, main frame adopts electric filter method that the harmonic components in the undesired signal is filtered, and adopts digital filtering to carry out filtering simultaneously, eliminates or reduces various interference and noise, makes sampled signal smooth.Main frame also is provided with full carrier sound identification function, makes instrument debate earlier to know in the pipeline whether just then just allow to enter next operating mode by carrier automatically under programmed control, need not manual intervention.In addition, the data protection function of instrument need not anyly be debugged after making the instrument start, can enter the monitoring operating mode.When carrying out work, the various signals of sending here by dynamo-electric sensing detection device, after amplifier amplification and Filtering Processing, convert digital quantity to by A/D converter again, microcomputer reads in these data and carries out a series of analyses, processing and computing, parameters such as ultimate density, flow velocity and output show by the digital display pipe with decimal system form or print by mini-printer, concentration and flow velocity and with the output of 0～10mA electric current as control signal.The working routine of main frame accounts for the 8K storage unit and is solidificated among the EPROM with the establishment of Z80 assembly language, and start address 0000H promptly enters working routine after the start.
Measurement range, condition of work and the precision index of two-phase fluid pipe detection measuring apparatus of the present invention are as follows:
One, measurement range
1. two-phase fluid concentration volumetric concentration＜60% is not (as considering pipe
The road blocks, with unrestricted);
2. two-phase fluid flow velocity 0.5m/s～8m/s;
3. two-phase fluid proportion poor＞0.059/cm3 is with to detect pipe diameter relevant.
Two, condition of work
1. internal diameter of the pipeline＞38mm;
2. close materials such as pipeline material steel, cast iron, plastics;
3. power supply: exchange 160～280V or direct current 20～30V;
4. the normal environment for use temperature of instrument: 0～40 ℃;
5. the normal serviceability temperature of force transducer:
Dosimetric sensors-10～55 ℃, inlet sensor-20～100 ℃;
6. instrument environments humidity :≤85% (relative humidity).
Three, precision index:
1. measurement of concetration error≤1%F.S (full scale);
2. fluid-velocity survey error≤3%F.S (full scale);
3. flow velocity repeatable accuracy≤1%F.S (full scale);
4. output error in dipping≤5%F.S (full scale);
5. output repeatable accuracy≤2%F.S (full scale).
Advantage of the present invention just is to adopt the online continuous dynamic weighing method of fluid to detect the concentration of two-phase fluid, compares with detection method such as radioactive ray, has reduced disturbing factor, has avoided radiation pollution.Also owing to adopt the ultrasonic Doppler speed-measuring method, detecting element contact with fluid, can detect suspended solids concentration higher be with corrosive fluid, enlarged the two-phase fluid sensing range, and had installation and maintenance advantage easily.Simultaneously owing to adopt the micromotor control eccentric regularly to rotate feel trim actuator, the benchmark weight be set and adopt the hydraulic resistance balance mode to cooperate the corresponding control program of instrument to solve the influence of the pressure variation of the temperature drift in the testing process, time drift and fluid and problems such as vibration, swing and shake to accuracy of detection.Therefore two-phase fluid pipe detection measuring apparatus of the present invention has development prospect widely as a kind of convenient and practical detection measuring apparatus in fields such as mud, paper pulp, hydromine and chemical industry solutions pipeline transportation.
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is a dynamo-electric sensing detection device synoptic diagram of the present invention;
Fig. 2 is the components and parts and the circuit arrangement synoptic diagram of instrument of the present invention;
Fig. 3 is a main program flow chart of the present invention.
With reference to Fig. 1, dynamo-electric sensing detection device of the present invention is serially connected in the pipeline, Its longitudinal length along pipeline is about 2000mm, by pressure sensing device [1], ultrasonic Flow velocity probe [2], steel wire rope A[3], lower lever [4], micro machine [5], off-centre Wheel [6], balance foundary weight [7], upper lever [8], force cell [9], measuring tube [10], steel wire rope B[11], elastomeric joint [12], stationary pipes [13], outer tube [14] consist of. Pressure sensing device [1] is installed in the stationary pipes [13] of elastomeric joint front end On, ultrasonic flow velocity probe [2] is installed on the measuring tube [10], measuring tube [10] two ends Link to each other with stationary pipes [13] by elastomeric joint [12], its two ends are near elastomeric joint [12] locate respectively by steel wire rope A[3] and steel wire rope B[11] and lower lever [4] before End links to each other with the rear end of upper lever [8]; Measuring tube [10] is provided with outer tube [14], in Be marked with between the outer tube added anti-icing fluid anti-freezing pressure water in order to the balance elastomeric joint The pressure of position fluid, steel wire rope A[8] and steel wire rope B[11] go out outer tube [14] and locate Sealing gasket is installed prevents spilling of pressure water; The rear end of lower lever [4] is bearing in Below the middle part of lever [8], the front end of upper lever [8] is balance foundary weight [7], off-centre Wheel [6] and micro machine [5], an end of force cell [9] is installed in upper lever and connects The position at nearly middle part, the supporting position of its other end and two levers is installed in outer tube On. When carrying out work, when fluid is flowed through measuring tube [10], because fluid concentrations Change, so that corresponding change also takes place the fluid weight in the measuring tube [10], survey The variation of amount pipe [10] weight is by steel wire rope A[3] and steel wire rope B[11], lower lever [4] and upper lever [8], finally pass to force cell [9], dynamometry by upper lever Sensor [9] passes to continuously instrument by cable with the signal that collects again and supplies Process. Micro machine [5] and eccentric wheel [6] etc. form the stable auxiliary body that compensates, and be logical Cross micro machine [5] timing belt movable eccentric wheel [6] and rotate, as per hour rotating once, make Regularly unloading zeroing of force cell [9] overcomes time drift and temperature drift. Flat Weighing apparatus foundary weight [7] also plays certain balance to acceleration force when system vibration, swing Effect. Pressure sensing device [1] is used for compensator fluid pressure to the impact of sense weight.
With reference to Fig. 2, be dynamo-electric sensing detection device device in two chain-dotted lines, comprise Stable micro machine auxiliary body [1], force cell [2], the benchmark weight ratio of compensating Install and force cell [3], pressure sensing device [4] and ultrasonic flow velocity probe [5] Instrument is made of lower column circuits and components and parts: LPF 1[6-1], LPF II[6-2], LPF III[6-3], data amplifier 1[7-1], data amplifier II[7-2], data amplifier III[7-3], A/D converter [8], Z80 microcomputer [9], Doppler range rate measurement circuit [10], voltage to frequency converter [11], flow velocity signal amplitude processor [12], zeroing circuit [13], D/A converter [14], concentration, flow velocity V/I changes [15], the aobvious group of number I[16], the aobvious group of number II[17], DIP switch [18], I/O interface [19], LED indicates [20], light electric coupler [21], control signal detects [22], Control circuit [23], Memory control circuit [24], acousto-optic warning [25], printhead power supply [26], printer [27], 16 light of output separate pass amount output [28], emergency power supply and control [29], anti-interference from recovering circuit [30], 24V → 220V inverter [31], AC voltage-stabilizing device [32], isolation transformer [33], LPF [34], DC converting [35], and each operating voltage [36], when carrying out work, by the stable micro machine auxiliary body [1] that compensates, force cell [2], benchmark weight comparison means and force cell [3], pressure sensing device [4] collection signal is through LPF [6-1～3], data amplifier [7-1～3], A/D converter [8] enter Z80 microcomputer [9] process, analyze, Computing and by the aobvious group of number II display densities, the data amplifying circuit can adopt improved The YD-15 type is moving answers instrument circuit, and its frequency response is about 100Hz. Visited by ultrasonic flow velocity Head [5] transmission of signal is given Doppler range rate measurement circuit [10], and the Doppler range rate measurement circuit is for changing The CDJ-II type ultrasonic Doppler tachometer circuit that advances, this circuit has increased the frequency deviation arteries and veins Frequency-voltage conversion circuit and the output protection circuit of punching. Signal is surveyed by Doppler Speed circuit [10] is through voltage to frequency converter [11], flow velocity signal amplitude processor [12], A/D converter [8] enters Z80 microcomputer [9] and processes and computing, and by The aobvious group of number 1[16] the demonstration flow velocity; According to concentration and flow velocity, analyze through Z80 microcomputer [9] Computing can get yield and flow, and by the aobvious pipe of number II[17] show.
With reference to Fig. 3, the contents of program that sequence number shows among the figure is: beginning [1], worker Be used as or debug [2], the aobvious group of number II count word voltage table [3], data initialization [4] , data accumulating [5], remember successfully [6], the code name of makeing mistakes [7], data be by memory District → workspace [8], transfer steady complementary modulus piece 1.2.3[9], the stability compensation? [10], Transfer steady complementary modulus piece 1[11], surely mend successfully? [12], make mistakes code name [13], flow velocity Qualified? [14], make mistakes code name [15], full matrix identification [16], zeroing and surplus Number [17], pressure compensation [18], set up pressure, concentration weigh correction table [19], Data by workspace → memory district [20], read in DIP switch [21], IM2 opens interruption [22], the aobvious group of number I show flow velocity [23], the aobvious group of number II display density, flow or Do output [24], 100ms arrive? [25], ask 20 sample means of concentration flow velocity [26] , 2 seconds arrive? [27], ask 400 sample means of concentration flow velocity [28], when surpassing Limit [29], acousto-optic warning [30], calculating time [31], arrive whole hour [32], transfer Steady complementary modulus piece 1.2.3[33], output calculates [34], output 16 bit switch amounts are defeated Go out [35]. The transmission of slave electricity sensing detection device detects signal and gives instrument, through above-mentioned Process analysis, processing, comprehensive, computing draw concentration, flow velocity, output at last With the flow value.
Below be one embodiment of the present of invention, enforcement of the present invention is not limited to this embodiment.
Certain glass sand factory produces 300000 tons of selected glass sands per year, adopts the sand ship and carries out obtaining from underwater installation, per hour 80～100 tons of (mortar amount 300～400M of yield
3/ hour).Following problems appear in the gamma-rays densimeter and the electromagnetic flowmeter of former employing domestic production:＜1〉instrument not have the vibration abatement fault frequent;＜2〉the big use inconvenience of volume;＜3〉display density and flow, no output demonstration is unfavorable for teams and groups' examination;＜4〉in the maintenance ship during equipment workman fear near radioactive source.Through on probation to detection measuring apparatus of the present invention, the user thinks the advantage of following several respects,＜1〉volume is not afraid of shake, no radiocontamination for a short time;＜2〉Presentation Function is many, is convenient to adopt operation of sand ship and management;＜3〉the overload alarm device is set and brings very big benefit to adopting the balanced production of sand ship, first subsequent technique ditch, plugging phenomenon do not occur running slightly, blocks up because of excessive concentration, and second is unlikely concentration crosses sinking low yield waste electric power.Check through real ship: measure the concentration value contrast that shows with apparatus of the present invention with the pulp density kettle, minute is 4 hours, the minute book contrive equipment concentration displayed values and measure sediment transport pipe exit concentration value respectively every 15 minutes, after measured, it is 32.33% that the pulp density kettle is measured concentration mean value, display density mean value of the present invention is 32.30%, only differs 0.03%.To leave the output cumulative number contrast that stockyard actual stacking number and apparatus of the present invention show in, minute is a class (eight hours), and 672 tons of the actual class of recording output, apparatus of the present invention show 685 tons of class's output, both relative errors 1.9%.The user thinks very and to be fit to the use that glass sand is adopted the sand ship, wishes to apply as early as possible.
Claims (2)
1, a kind of two-phase fluid pipe detection measuring apparatus is made of dynamo-electric sensing detection device and instrument, it is characterized in that:
＜1〉dynamo-electric sensing device adopts online continuous dynamic weighing structure by being serially connected in ducted measuring tube and dynamo-electric transducing part is formed, and comprises elastomeric joint, measuring tube, wire rope, parts such as lever, upper lever, balance foundary weight, eccentric wheel, micromotor, force cell down; Measuring tube is connected with fixed-piping by the elastomeric joint at two ends, the two ends of measuring tube link to each other with two levers up and down of portion fixed thereon respectively by two wire rope, the wire rope of front end connects the front end of lever down, the rear end of following lever be bearing in upper lever middle part below, the front end of upper lever is balance foundary weight, eccentric wheel and micromotor, its rear end links to each other with the wire rope of measuring tube rear end, and force cell also is housed on the upper lever;
＜2〉instrument is made up of mainframe box and power supply box, and external power supply input power supply box produces each operating voltage through AC voltage regulator, isolating transformer, low-pass filtering, DC converting etc. and supplies with main frame; The mainframe box main frame is controlled by Z80CPU, adopts the moving instrument circuit of answering of improved YD-15 type; Three buses of CPU all have the bus driver impact damper, and A/D and D/A conversion and relay I/O circuit are the photoelectricity coupling, are provided with total line filter.
2, two-phase fluid pipe detection measuring apparatus according to claim 1, it is characterized in that dynamo-electric sensing detection device also comprises outer tube, pressure transducer, ultrasonic flow velocity probe, measuring tube is provided with outer tube, be marked with the antifreeze press water that has added anti freezing solution between the inner and outer pipes, pressure transducer is installed on the preceding fixed-piping of front end elastomeric joint, and ultrasonic flow velocity probe is installed on the first half of measuring tube; Instrument has adopted improved CDJ-II type ultrasonic Doppler tachometer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95111090 CN1056234C (en) | 1995-06-29 | 1995-06-29 | Fluid-detecting measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95111090 CN1056234C (en) | 1995-06-29 | 1995-06-29 | Fluid-detecting measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1139209A true CN1139209A (en) | 1997-01-01 |
| CN1056234C CN1056234C (en) | 2000-09-06 |
Family
ID=5078406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95111090 Expired - Fee Related CN1056234C (en) | 1995-06-29 | 1995-06-29 | Fluid-detecting measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1056234C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360024A (en) * | 2011-08-24 | 2012-02-22 | 陕西科技大学 | Paper pulp flow velocity and flow measuring method |
| CN102360023A (en) * | 2011-08-24 | 2012-02-22 | 陕西科技大学 | Paper pulp flow velocity and flow measuring apparatus and measuring method thereof |
| CN102625905A (en) * | 2009-05-04 | 2012-08-01 | 琼脂有限公司 | Multi-phase fluid measurement apparatus and method |
| CN106405156A (en) * | 2016-10-14 | 2017-02-15 | 中国人民解放军理工大学 | Portable flow velocity meter calibration device |
| CN107976221A (en) * | 2017-12-05 | 2018-05-01 | 山东思达特测控设备有限公司 | A kind of low-power consumption remote-transmission module of supporting AS ultrasonic flowmeters |
| CN109324208A (en) * | 2018-09-05 | 2019-02-12 | 哈尔滨工程大学 | A kind of vehicle repair major current density based on ultrasonic velocity method, mass flow and phase content integrated analysis instrument |
-
1995
- 1995-06-29 CN CN 95111090 patent/CN1056234C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625905A (en) * | 2009-05-04 | 2012-08-01 | 琼脂有限公司 | Multi-phase fluid measurement apparatus and method |
| CN102625905B (en) * | 2009-05-04 | 2013-10-30 | 琼脂有限公司 | Multi-phase fluid measurement apparatus and method |
| CN102360024A (en) * | 2011-08-24 | 2012-02-22 | 陕西科技大学 | Paper pulp flow velocity and flow measuring method |
| CN102360023A (en) * | 2011-08-24 | 2012-02-22 | 陕西科技大学 | Paper pulp flow velocity and flow measuring apparatus and measuring method thereof |
| CN106405156A (en) * | 2016-10-14 | 2017-02-15 | 中国人民解放军理工大学 | Portable flow velocity meter calibration device |
| CN106405156B (en) * | 2016-10-14 | 2022-07-01 | 中国人民解放军理工大学 | Portable current meter calibrating installation |
| CN107976221A (en) * | 2017-12-05 | 2018-05-01 | 山东思达特测控设备有限公司 | A kind of low-power consumption remote-transmission module of supporting AS ultrasonic flowmeters |
| CN109324208A (en) * | 2018-09-05 | 2019-02-12 | 哈尔滨工程大学 | A kind of vehicle repair major current density based on ultrasonic velocity method, mass flow and phase content integrated analysis instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1056234C (en) | 2000-09-06 |
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