CN104764510A - Calibration system for full-automatic direct-inserted hot type gas mass-flow meter and application thereof - Google Patents
Calibration system for full-automatic direct-inserted hot type gas mass-flow meter and application thereof Download PDFInfo
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- CN104764510A CN104764510A CN201510197021.1A CN201510197021A CN104764510A CN 104764510 A CN104764510 A CN 104764510A CN 201510197021 A CN201510197021 A CN 201510197021A CN 104764510 A CN104764510 A CN 104764510A
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Abstract
The invention discloses a calibration system for a full-automatic direct-inserted hot type gas mass-flow meter and an application thereof. An alternating current power source is connected with a power supply end of a draught fan through a frequency converter, an air outlet end of the draught fan is sequentially provided with a current stabilization pot, a standard scale and the hot type gas mass-flow meter in the air outlet direction, the draught fan is connected with the current stabilization pot through a first pipeline in a conducted mode, the current stabilization pot is connected with the standard scale through a second pipeline in a conducted mode, and the standard scale is connected with the hot type gas mass-flow meter through a third pipeline in a conducted mode; a direct current power source supplies power for the standard scale, the hot type gas mass-flow meter and a main control machine, digital output ends of the standard scale and the hot type gas mass-flow meter are connected with an input end of the main control machine respectively, and an output end of the main control machine is controlled to be connected with the frequency converter. The problem that in the prior art a large number of financial resources and manpower is cost when a product is calibrated is successfully solved, the accuracy of the calibration system is extremely high, the operation is simple and convenient, and the calibration system is suitable for being used and popularized.
Description
Technical field
The invention belongs to thermal type gas quality flow monitoring field, particularly a kind of full-automatic direct insertion thermal type gas quality flow meter calibration system and application thereof.
Background technology
At present, thermal type gas quality flow meter is applied in the fluid measurement of oil, rock gas, water treatment, chemistry, papermaking, electric power, food and pharmaceuticals industry widely, thermal type gas quality flow meter has without the need to temperature pressure compensation, installs advantage that is simple and pressure-resistant corrosion-resistant, measurable range is wide, can survey large-caliber flow.
Phase early 1990s, world wide TMF consumption sum accounts for 8% of flow instrument, about 4.5 ten thousand, domestic the mid-90 sales volume be about annual about 1000, just there is thermal type gas quality flow meter in recent years; The comparative maturity of external thermal type gas quality flow meter development, is domesticly also in the infancy, and on market, product quantity is less, so the kind of calibration system is just more rare.
Calibration system of the prior art is mainly divided into 3 classes: bell-jar calibration system, sonic nozzle formula calibration system, standard table calibration system; Wherein, bell-jar caliberating device: by the volume of bell jar measurement gas, by densitometer and gauge measurement correlation parameter, calculates the mass rate of gas finally by formula; But bell-jar caliberating device and sonic nozzle formula caliberating device involve great expense and can reach 30 ten thousand to 100 ten thousand yuan, only have some metering institutes and have the institution of higher learning of gas flow research project just to have corresponding caliberating device, meanwhile, bell-jar calibration system maintenance cost is high, equipment needed thereby is various and take up room large;
Sonic nozzle caliberating device: by carrying out the mass rate of gas in calibration pipeline to the gaseous mass of ejection of metering sonic nozzle, its exist equally expensive, maintenance cost is high and the large shortcoming that takes up room.
At present, direct insertion thermal type gas quality flow meter needs just can normally use after demarcating, and owing to buying, calibration facility involves great expense, the nominal time is long, needs demarcation personnel substantial length of operation, wastes time and energy in use procedure; Object of the present invention is a calibration system being applicable to direct insertion thermal type gas quality flow meter of design.
Summary of the invention
Technical matters to be solved by this invention is, overcome the shortcoming of prior art, a kind of full-automatic direct insertion thermal type gas quality flow meter calibration system and application thereof are provided, successfully solve product in prior art and demarcate a large amount of financial resources and manpower that spend, and this calibration system accuracy is high, easy and simple to handle, be suitable for popularization energetically and use.
In order to solve above technical matters, the invention provides a kind of full-automatic direct insertion thermal type gas quality flow meter calibration system, comprise main control computer, AC power, direct supply, frequency converter, blower fan, steady-flow tank, standard scale and thermal type gas quality flow meter, wherein:
AC power is by the feeder ear of frequency converter connecting fan, the outlet air end of blower fan is disposed with steady-flow tank, standard scale and thermal type gas quality flow meter along its air-out direction, be connected by the first pipeline conducting between blower fan with steady-flow tank, be connected by second pipe conducting between steady-flow tank with standard scale, standard scale is connected by the 3rd pipeline conducting with thermal type gas quality flow meter;
Direct supply is powered to standard scale, thermal type gas quality flow meter and main control computer respectively, and the digital output end of standard scale and thermal type gas quality flow meter connects the input end of main control computer respectively, and the control output end of main control computer connects frequency converter;
Technique effect: in prior art, need to go to demarcate to the laboratory of other satisfied demarcation conditions, product is demarcated at every turn to be needed to spend thousands of unit, then company saves the expense of hundreds of thousands every year, and calibration system accuracy designed by the present invention is high, easy and simple to handle, be suitable for popularization energetically and use.
The present invention have also been devised a kind of application of full-automatic direct insertion thermal type gas quality flow meter calibration system, wherein:
First opening direct supply is that standard scale, thermal type gas quality flow meter and main control computer are powered;
Main control computer controls the frequency of operation of frequency converter, and opening AC power, is that blower fan is powered by frequency converter;
The air of blower fan blowout enters steady-flow tank through the first pipeline, now the air of flow speed stability is through second pipe Engage of standard table, enter thermal type gas quality flow meter through the 3rd pipeline again, because the pressure in second pipe is steady, standard scale produces the mass flow value of one group of standard;
Main control computer gathers the mass flow value of standard, and is synchronized to thermal type gas quality flow meter, is mated voluntarily, namely obtain the 1st group of calibration point by thermal type gas quality flow meter;
Subsequently, main control computer controls frequency converter and changes frequency of operation, and repeats the matching operation of thermal type gas quality flow meter in above-mentioned application, to the demarcation namely completing direct insertion thermal type gas quality flow meter after obtaining 25 groups of calibration points;
Technique effect: the design of 25 groups of calibration points, the required precision that can either meet product also can save the nominal time of every platform thermal type gas quality flow meter, substantially increases efficiency; Adopt main control computer to control frequency converter in the present invention to automatically adjust the flow of blower fan, meanwhile, main control computer automatic data collection synchronous beacon locking equipment; The automaticity of designed calibration system of the present invention is high, and the use that steady-flow tank makes makes gas flow more stable, and calibration result is more accurate.
The technical scheme that the present invention limits further is:
Further, the application of aforesaid full-automatic direct insertion thermal type gas quality flow meter calibration system, main control computer controls frequency converter incrementally to change frequency of operation, and the amplitude that increases progressively is 2Hz, when namely obtaining the 1st group of calibration point, the frequency of operation of frequency converter is 2Hz, when obtaining the 25th group of calibration point, the frequency of operation of frequency converter is 50Hz, and meanwhile, the main control computer adjacent time interval controlling frequency converter change frequency of operation for twice is 2min;
The machine code that the increasing degree of technique effect: 2Hz can make thermal type gas quality flow meter represent gas flow increases with the interval of a relative equilibrium, thus makes measured calibration data more accurate.
The application of aforesaid full-automatic direct insertion thermal type gas quality flow meter calibration system, AC power specification is 380V, and power is greater than 30KW, and the specification of direct supply is 24V/1A, and the power of blower fan and frequency converter is 15KW, and standard scale selects turbo flow meter.
The application of aforesaid full-automatic direct insertion thermal type gas quality flow meter calibration system, first, second and third pipeline is stainless-steel tube, and the internal diameter of the first pipeline is 200mm, and the internal diameter of second, third pipeline is 100mm, the length of second pipe is 2 meters, and the length of the 3rd pipeline is 1 meter;
Technique effect: the front end pipeline section demand fulfillment due to calibration facility is more than or equal to the distance of 10 times of calibers, in the present invention, the interior strength of second, third pipeline selects 1 meter, so not only meet the technical requirement of demarcation, greatly reduce the shortcoming that calibration system floor area is large simultaneously.
The application of aforesaid full-automatic direct insertion thermal type gas quality flow meter calibration system, steady-flow tank comprises both ends open and the cylindrical tank vertically arranged, its both ends open portion is welded with semicircle cover body respectively, on tank body near top and near bottom position respectively conducting be provided with gas vent and gas access, the opening direction of gas vent and gas access is completely contrary, and the axis of gas vent and gas access is parallel to each other and crossing with the axis of cylindrical tank respectively;
The material of steady-flow tank is stainless steel, the internal diameter 300mm of cylindrical tank, and length is 1 meter, and the internal diameter of semicircle cover body is the semicircle of 300mm, and gas access and gas vent connect the first and second pipelines respectively.
Technique effect: the design of semicircle cover body enables gas in the inner smooth inflow and outflow of steady-flow tank, through the effect that test of many times draws length 1 meter, the cylindrical tank of diameter 300mm can either meet current stabilization, simultaneously again can not the maximum flow of impact to voltage blower fan, ensure that demarcate can be accurately strict carrying out.
Accompanying drawing explanation
The structure principle chart of the full-automatic direct insertion thermal type gas quality flow meter calibration system of Fig. 1 designed by the present invention;
Fig. 2 is the structural representation of barretter in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
embodiment 1
As shown in Figure 1, the full-automatic direct insertion thermal type gas quality flow meter calibration system of the one that the present embodiment provides, comprises main control computer, AC power, direct supply, frequency converter, blower fan, steady-flow tank, standard scale and thermal type gas quality flow meter, wherein:
AC power is by the feeder ear of frequency converter connecting fan, the outlet air end of blower fan is disposed with steady-flow tank, standard scale and thermal type gas quality flow meter along its air-out direction, be connected by the first pipeline conducting between blower fan with steady-flow tank, be connected by second pipe conducting between steady-flow tank with standard scale, standard scale is connected by the 3rd pipeline conducting with thermal type gas quality flow meter;
Direct supply is powered to standard scale, thermal type gas quality flow meter and main control computer respectively, and the digital output end of standard scale and thermal type gas quality flow meter connects the input end of main control computer respectively, and the control output end of main control computer connects frequency converter.
embodiment 2
As shown in Figure 1, the application of a kind of full-automatic direct insertion thermal type gas quality flow meter calibration system that the present embodiment provides, wherein:
First opening direct supply is that standard scale, thermal type gas quality flow meter and main control computer are powered;
Main control computer controls the frequency of operation of frequency converter, and opening AC power, is that blower fan is powered by frequency converter;
The air of blower fan blowout enters steady-flow tank through the first pipeline, now the air of flow speed stability is through second pipe Engage of standard table, enter thermal type gas quality flow meter through the 3rd pipeline again, because the pressure in second pipe is steady, standard scale produces the mass flow value of one group of standard;
Main control computer gathers the mass flow value of standard, and is synchronized to thermal type gas quality flow meter, is mated voluntarily, namely obtain the 1st group of calibration point by thermal type gas quality flow meter;
Subsequently, main control computer controls frequency converter and changes frequency of operation, and repeats the matching operation of thermal type gas quality flow meter in above-mentioned application, to the demarcation namely completing direct insertion thermal type gas quality flow meter after obtaining 25 groups of calibration points;
Main control computer controls frequency converter incrementally to change frequency of operation, and the amplitude that increases progressively is 2Hz, when namely obtaining the 1st group of calibration point, the frequency of operation of frequency converter is 2Hz, when obtaining the 25th group of calibration point, the frequency of operation of frequency converter is 50Hz, and meanwhile, the main control computer adjacent time interval controlling frequency converter change frequency of operation for twice is 2min;
AC power specification is 380V, and power is greater than 30KW, and the specification of direct supply is 24V/1A, and the power of blower fan and frequency converter is 15KW, and standard scale selects turbo flow meter.
First, second and third pipeline is stainless-steel tube, and the internal diameter of the first pipeline is 200mm, and the internal diameter of second, third pipeline is 100mm, and the length of second pipe is 2 meters, and the length of the 3rd pipeline is 1 meter;
As shown in Figure 2, steady-flow tank comprises both ends open and the cylindrical tank vertically arranged, its both ends open portion is welded with semicircle cover body respectively, on tank body near top and near bottom position respectively conducting be provided with gas vent and gas access, the opening direction of gas vent and gas access is completely contrary, and the axis of gas vent and gas access is parallel to each other and crossing with the axis of cylindrical tank respectively;
The material of steady-flow tank is stainless steel, the internal diameter 300mm of cylindrical tank, and length is 1 meter, and the internal diameter of semicircle cover body is the semicircle of 300mm, and gas access and gas vent connect the first and second pipelines respectively.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (6)
1. a full-automatic direct insertion thermal type gas quality flow meter calibration system, is characterized in that, comprise main control computer, AC power, direct supply, frequency converter, blower fan, steady-flow tank, standard scale and thermal type gas quality flow meter, wherein:
Described AC power is by the feeder ear of frequency converter connecting fan, the outlet air end of described blower fan is disposed with steady-flow tank, standard scale and thermal type gas quality flow meter along its air-out direction, described blower fan is connected by the first pipeline conducting with between steady-flow tank, described steady-flow tank is connected by second pipe conducting with between standard scale, and described standard scale is connected by the 3rd pipeline conducting with thermal type gas quality flow meter;
Described direct supply is powered to standard scale, thermal type gas quality flow meter and main control computer respectively, and the digital output end of described standard scale and thermal type gas quality flow meter connects the input end of main control computer respectively, and the control output end of described main control computer connects frequency converter.
2. the application of full-automatic direct insertion thermal type gas quality flow meter calibration system according to claim 1, is characterized in that:
First opening direct supply is that standard scale, thermal type gas quality flow meter and main control computer are powered;
Described main control computer controls the frequency of operation of frequency converter, and opening AC power, is that blower fan is powered by frequency converter;
The air of described blower fan blowout enters steady-flow tank through the first pipeline, now the air of flow speed stability is through second pipe Engage of standard table, enter thermal type gas quality flow meter through the 3rd pipeline again, because the pressure in second pipe is steady, standard scale produces the mass flow value of one group of standard;
Described main control computer gathers the mass flow value of standard, and is synchronized to thermal type gas quality flow meter, is mated voluntarily, namely obtain the 1st group of calibration point by thermal type gas quality flow meter;
Subsequently, main control computer controls frequency converter and changes frequency of operation, and repeats the matching operation of thermal type gas quality flow meter in above-mentioned application, to the demarcation namely completing direct insertion thermal type gas quality flow meter after obtaining 25 groups of calibration points.
3. the application of full-automatic direct insertion thermal type gas quality flow meter calibration system according to claim 2, it is characterized in that: described main control computer controls frequency converter incrementally to change frequency of operation, and the amplitude that increases progressively is 2Hz, when namely obtaining the 1st group of calibration point, the frequency of operation of frequency converter is 2Hz, and when obtaining the 25th group of calibration point, the frequency of operation of frequency converter is 50Hz, meanwhile, the main control computer adjacent time interval controlling frequency converter change frequency of operation for twice is 2min.
4. the application of full-automatic direct insertion thermal type gas quality flow meter calibration system according to claim 2, it is characterized in that, described AC power specification is 380V, power is greater than 30KW, the specification of described direct supply is 24V/1A, the power of described blower fan and frequency converter is 15KW, and described standard scale selects turbo flow meter.
5. the application of full-automatic direct insertion thermal type gas quality flow meter calibration system according to claim 2, it is characterized in that, described first, second and third pipeline is stainless-steel tube, the internal diameter of the first pipeline is 200mm, the internal diameter of second, third pipeline is 100mm, the length of described second pipe is 2 meters, and the length of described 3rd pipeline is 1 meter.
6. the application of full-automatic direct insertion thermal type gas quality flow meter calibration system according to claim 2, it is characterized in that, described steady-flow tank comprises both ends open and the cylindrical tank vertically arranged, its both ends open portion is welded with semicircle cover body respectively, on described tank body near top and near bottom position respectively conducting be provided with gas vent and gas access, the opening direction of described gas vent and gas access is completely contrary, and the axis of described gas vent and gas access is parallel to each other and crossing with the axis of cylindrical tank respectively;
The material of described steady-flow tank is stainless steel, the internal diameter 300mm of cylindrical tank, and length is 1 meter, and the internal diameter of semicircle cover body is the semicircle of 300mm, and gas access and gas vent connect the first and second pipelines respectively.
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| CN201510197021.1A CN104764510A (en) | 2015-04-23 | 2015-04-23 | Calibration system for full-automatic direct-inserted hot type gas mass-flow meter and application thereof |
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Cited By (1)
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| CN106643989A (en) * | 2016-11-22 | 2017-05-10 | 重庆川仪自动化股份有限公司 | Density Calibration System and Method for Mass Flow Meter |
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Application publication date: 20150708 |