CN205246143U - Gas metering - Google Patents
Gas metering Download PDFInfo
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- CN205246143U CN205246143U CN201520932042.9U CN201520932042U CN205246143U CN 205246143 U CN205246143 U CN 205246143U CN 201520932042 U CN201520932042 U CN 201520932042U CN 205246143 U CN205246143 U CN 205246143U
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Abstract
The utility model provides a gas metering, include: casing, flowmeter main part and electronic control subassembly storehouse. The casing set up in outside the flowmeter main part, electronic control subassembly storehouse set up in on the casing. The flowmeter main part includes, the interface that admits air, the interface and being located of giving vent to anger admit air the interface with gas channel between the interface gives vent to anger. Be provided with a gas channel and the 2nd gas channel in the gas channel, set up the sensor respectively in a gas channel and the 2nd gas channel. The fluid parameter that gathered through the sensor in electronic control subassembly storehouse calculates total magnitude of the gas that a gas channel is corresponding and total magnitude of the gas that the 2nd gas channel corresponds respectively, electronic control subassembly storehouse still shows above -mentioned gaseous total magnitude. The utility model provides a gas metering installation safeguard that difficult, range pollutes the back than little and sensor and continues to measure and result in the unsafe technical problem of measured data.
Description
Technical field
The utility model relates to gas dosing field, in particular to a kind of gas flowMeter.
Background technology
Existing for small-business gas user (range of flow 0-50 cube m/h)Gas meter, flow meter is taking leather diaphragm type stem-winder as main, and leather diaphragm type stem-winder build is large, and measurement data needsAdditional digital conversion device just can convert electronic signal to mechanical signal, increases dimension is installedThe difficulty of protecting and cost. The range ratio of existing machinery instrument and electronic gas flowmeter is confined toThe design of stem-winder structure and electronic component, general range ratio is little, usually can meet a large amount ofJourney is measured, and but cannot meet small-range and measure. Simultaneously because of gas flow internal environment complexity,Sensor in the time polluting or damage because finding in time and maintenance can cause gas flow measurementInaccurate. How to provide a kind of easy for installation, to measure range larger and measure gas accuratelyFlowmeter body is the technical problem of being badly in need of solution to those skilled in the art.
Utility model content
In order to overcome the little and sensing of gas flowmeter installation and maintenance difficulty in prior art, range ratioAfter device pollutes, continue measurement and cause the inaccurate defect of measurement data, the utility model will solveTechnical problem be to provide that one is convenient to install, range ratio is large and sensor pollute after can andThe gas flowmeter of alarm.
The utility model provides a kind of gas flowmeter, comprising: housing, flowmeter main body andElectronic Control Unit storehouse. Described housing is arranged at outside described flowmeter main body, described electronics controlAssembly processed storehouse is arranged on described housing. Described flowmeter main body comprises, intake interface, goes outGas interface and described intake interface and described in the gas flow of giving vent to anger between interface, described inIntake interface with described in the interface of giving vent to anger be arranged on the same side of described gas flowmeter. InstituteState in gas flow and be provided with the first gas flow and the second gas flow, gas is describedIn one gas flow, flow direction is identical with gas flow direction in described gas flow, instituteThe space of stating between the first gas flow and described gas flow forms described the second gas flowRoad. In described the first gas flow, be provided with first sensor unit, described first sensorUnit is for measuring the gas flow parameter of described the first gas flow of flowing through. Described the second gasIn body runner, be provided with the second sensor unit, described the second sensor unit is used for measuring streamThrough the gas flow parameter of described the second gas flow. Described Electronic Control Unit storehouse comprisesOne metering units, the first memory cell, the second metering units, the second memory cell and demonstrationUnit. Described the first metering units is connected with described first sensor unit for calculating flows throughThe total amount value of described the first gas flow gas, described the second metering units and described second passesSensor cell connects the total amount value for calculating described the second gas flow gas of flowing through. DescribedThe first memory cell is the total amount value through described the first gas flow gas for storage flow, described inThe second memory cell is the total amount value through described the second gas flow gas for storage flow. DescribedThe first memory cell is connected with described display unit with the second memory cell, described display unitShow the total amount value of gas in described the first memory cell and/or the second memory cell.
Further, the first gas flow described in above-mentioned gas flowmeter is a venturi knotStructure, described first sensor unit is arranged at the venturi position of described Venturi tube structure, instituteState the inner wall position place that the second sensor unit is arranged at described the second gas flow. Described in inciting somebody to actionThe venturi position that first sensor unit is arranged at the first gas flow Venturi tube structure is convenient toBetter measurement gas flow parameter, is arranged at described the second gas by described the second sensor unitThe inner wall position place of body runner is for the ease of the second sensor unit energy Measurement accuracy gas flowAmount parameter.
Further, first sensor unit described in above-mentioned gas flowmeter and described secondSensor unit comprises having the mass flow sensor of temperature compensation function and have pressureThe differential pressure pick-up of compensate function. The gas flow value detecting can be subject to temperature and pressureImpact, is compensated and can be made the data of metering more accurate by temperature and pressure.
Further, described in above-mentioned gas flowmeter, Electronic Control Unit storehouse also comprises: theOne redundant memory cell and the second redundant memory cell. Described the first redundant memory cell is used forBack up the data of described the first memory cell, described the second redundant memory cell is used for backing up instituteState the data of the second memory cell. Data in memory cell are backuped to other backup depositsIn storage unit. Can effectively prevent that data message that memory cell accidental damage causes from losingDefect, guarantees data information security.
Further, above-mentioned gas flowmeter also comprises: valve, described valve is arranged at instituteState the position near described intake interface between the first gas flow and described intake interface.In the low electricity of described gas flowmeter, arrearage or break down and close institute can not normally measure timeState valve, can effectively prevent potential safety hazard.
Further, the first memory cell described in above-mentioned gas flowmeter and the second storage are singleUnit is connected with described display unit by wire.
Further, above-mentioned gas flowmeter, also comprises: a fluid rectifier, described streamBody rectifier is arranged between described the first gas flow and described intake interface. Described fluidRectifier, for the gas that flows into described gas flow is shunted, makes wherein part streamEnter described the first gas flow, remaining portion gas flows into described the second gas flow. DescribedFluid rectifier has the flow through effect of gas flow pattern in described gas pipeline of combing, by adjustingSaving described fluid rectifier can change and enter the first gas flow and the second gas flow gasRatio.
Further, the first metering units described in above-mentioned gas flowmeter and described secondAmount unit comprises proportional compensation device. Described proportional compensation device divides according to described fluid rectifierThe actual gas that stream ratio calculates described the first metering units and described the second metering unitsBody total amount value compensates, and described the first metering units and described the second metering units are calculatedThe gas gross value gas gross value of described gas flow that equals to flow through after the compensation obtaining. RootAccording to the shunt ratio of fluid rectifier, the first metering units and described the second metering units are obtainedTo real gas total amount value compensate, by show the first memory cell or second storageThe gas gross value of unit just can realize reading of total gas flow rate value to the gas flow of flowing throughGet.
Further, fluid rectifier described in above-mentioned gas flowmeter is to flowing into described gasThe gas of runner carries out equal proportion shunting, makes to enter described the first gas flow and described secondThe gas flow of gas flow equates. Shunt in proportion and conveniently compensate computing.
Prior art relatively, the utility model provides a kind of gas flowmeter to comprise: shellBody, flowmeter main body and Electronic Control Unit storehouse. Described housing is arranged at described flowmeter masterExternal, described Electronic Control Unit storehouse is arranged on described housing. Described flowmeter main body bagDraw together, intake interface, give vent to anger interface and described intake interface and described in give vent to anger between interfaceGas flow, described intake interface with described in the interface of giving vent to anger be arranged at described gas flowmeterSame side on. In described gas flow, be provided with the first gas flow and the second gas flowRoad, gas in described the first gas flow flow direction and gas in described gas flowFlow direction is identical, and the space between described the first gas flow and described gas flow formsDescribed the second gas flow. In described the first gas flow, be provided with first sensor unit,Described first sensor unit is for measuring the gas flow ginseng of described the first gas flow of flowing throughNumber. In described the second gas flow, be provided with the second sensor unit, described the second sensorUnit is for measuring the gas flow parameter of described the second gas flow of flowing through. Described electronics controlAssembly processed storehouse comprises the first metering units, the first memory cell, the second metering units, secondMemory cell and display unit. Described the first metering units and described first sensor unit connectConnect the total amount value for calculating described the first gas flow gas of flowing through, described the second metering is singleFirst and described the second sensor unit is connected for calculating described the second gas flow gas of flowing throughTotal amount value. Described the first memory cell is used for storage flow through described the first gas flow gasTotal amount value, described the second memory cell for storage flow through described the second gas flow gasTotal amount value. Described the first memory cell is connected with described display unit with the second memory cell,Described display unit shows gas in described the first memory cell and/or the second memory cellTotal amount value. Adopt above-mentioned gas flowmeter can directly export electronic signal, without external numberAccording to conversion equipment, save installation and maintenance cost. Above-mentioned gas flowmeter is with respect to existing gasFlowmeter is provided with two gas flows, two corresponding two groups of separate gas of gas flowBody metering system, can improve gas flowmeter and measure the range ratio of gas. Meanwhile, twoSensor is positioned at different air flues, can, via the data of both independent measurement gained, contrast,To judge the pollution condition of sensor. Variant when both Data Comparisons, can send pollutionReport to the police, indicating instrument is safeguarded, ensures the accuracy of DATA REASONING.
Brief description of the drawings
For clearer explanation the utility model embodiment or technical side of the prior artCase, makes the accompanying drawing to required use in embodiment or description of the Prior Art simple belowIntroduce, apparently, the accompanying drawing in the following describes is only realities more of the present utility modelExecute example, for those of ordinary skill in the art, in the prerequisite of not paying creative workUnder, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the structure of the gas flowmeter that provides of the utility model the first specific embodiment is shownIntention;
Fig. 2 is that the cross section of the gas flowmeter that provides of the utility model the first specific embodiment showsIntention;
Fig. 3 is part gas in the gas flowmeter that provides of the utility model the first specific embodimentThe structural representation of body runner;
Fig. 4 is the first gas in the gas flowmeter that provides of the utility model the first specific embodimentThe structural representation of body runner;
Fig. 5 is electronics control in the gas flowmeter that provides of the utility model the first specific embodimentThe structural framing figure in assembly processed storehouse.
Wherein, Reference numeral gathers as follows:
Gas flowmeter 100; Shell 110; Flowmeter main body 120; Intake interface 121;The interface 122 of giving vent to anger; Gas flow 123; The first gas flow 1232; The second gas flow1233; Venturi 1234; First sensor unit 1235; The second sensor unit 1237;Valve 124; Fluid rectifier 125; Electronic Control Unit storehouse 130; The first metering units 131;The first memory cell 132; The second metering units 133; The second memory cell 134; Show singleUnit 136.
Detailed description of the invention
Also by reference to the accompanying drawings the utility model is done further below by specific embodimentDescribe in detail.
With reference to Fig. 1 and Fig. 2, the gas flow that the utility model the first specific embodiment providesMeter 100 comprises: housing 110, flowmeter main body 120 and Electronic Control Unit storehouse 130. InstituteState housing 110 and be arranged at outside described flowmeter main body 120, described Electronic Control Unit storehouse 130Be arranged on described housing 110. Described flowmeter main body 120 comprises, intake interface 121,Give vent to anger interface 122 and described intake interface 121 and described in give vent to anger between interface 122Gas flow 123, described intake interface 121 with described in give vent to anger described in interface 122 is arranged atOn the same side of gas flowmeter 100. In described gas flow 123, be provided with the first gasBody runner 1232 and the second gas flow 1233, gas is at described the first gas flow 1232Middle flow direction is identical with gas flow direction in described gas flow 123, and described firstSpace between gas flow 1232 and described gas flow 123 forms described the second gas flowRoad 1233.
With reference to Fig. 3 and Fig. 4, in described the first gas flow 1232, be provided with first sensorUnit 1235, described first sensor unit 1235 is for measuring described the first gas of flowing throughThe gas flow parameter of runner 1232. In described the second gas flow 1233, be provided with secondSensor unit 1237, described the second sensor unit 1237 flows through described for measuringThe gas flow parameter of two gas flows 1233.
With reference to Fig. 5, described Electronic Control Unit storehouse 130 comprises the first metering units 131,One memory cell 132, the second metering units 133, the second memory cell 134 and display unit136. Described the first metering units 131 is connected and is used for described first sensor unit 1235The flow through total amount value of described the first gas flow 1232 gases of calculating, described the second metering units133 are connected with described the second sensor unit 1237 for calculating described the second gas flow of flowing throughThe total amount value of road 1233 gases. Described the first memory cell 132 for storage flow through describedThe total amount value of one gas flow 1232 gases, described the second memory cell 134 is for storage flowThrough the total amount value of described the second gas flow 1233 gases. Described the first memory cell 132Be connected described display unit 136 with described display unit 136 with the second memory cell 134Show the total amount of gas in described the first memory cell 132 and/or the second memory cell 134Value.
In this specific embodiment, described in intake interface 121 is arranged on the interface 122 of giving vent to angerThe same side of gas flowmeter 100, can be widely used in now urban gas supply at presentThe situation that pipeline homonymy arranges. On intake interface 121 and the interface 122 of giving vent to anger, arrange simultaneouslyScrew thread, is connected the peace that can realize gas flowmeter 100 by screw thread with gas supply pipelineDress, can be widely used in the metering demand to town gas.
In this specific embodiment, adopt above-mentioned gas flowmeter 100 can directly export electricitySubsignal, without external data conversion equipment, saves installation and maintenance cost. Described gas flowRoad 123 is divided into the first gas flow 1232 and 1233, two gases of the second gas flowThe corresponding two groups of separate gas metering systems of runner, can improve gas flowmeter 100The range ratio of measurement gas. Meanwhile, two sensors are positioned at different air flues, can be via bothThe data of independent measurement gained, contrast, to judge the pollution condition of sensor. When twoPerson's Data Comparison is variant, can send to pollute and report to the police, and indicating instrument is safeguarded, ensures dataThe accuracy of measuring.
With reference to Fig. 3 and Fig. 4, the gas flow providing at the utility model the first specific embodimentAmount meter 100, further, described the first gas flow 1232 is a Venturi tube structure, instituteState venturi 1234 positions that first sensor unit 1235 is arranged at described Venturi tube structure,Described the second sensor unit 1237 is arranged at the inwall position of described the second gas flow 1233Put place.
In this specific embodiment, Venturi tube structure is installed in described gas flow 123,The axis of Venturi tube structure need be parallel with the interior gas flow direction of described gas flow 123,The entrance of the entrance of described Venturi tube structure is the air inlet of described the first gas flow 1232Mouthful, the outlet of the diffuser of described Venturi tube structure is going out of described the first gas flow 1232Gas port. Described first sensor unit 1235 is arranged on the venturi 1234 of described Venturi tube structurePosition, is arranged at described the second gas flow 1233 by described the second sensor unit 1237Inner wall position place. Described first sensor unit 1235 and the second sensor unit 1237For measuring the gas flow parameter of the place gas flow 123 of flowing through. Described gas flow ginsengNumber comprises thermal field variable quantity, adopts thermal field variable quantity metering gas flow, than existing cityOn face, adopt the gas flow of volumetric measurement formula and the metering of tachometric survey formula gas flowmeter morePrecisely.
By the restriction of said structure, in the time that gas flows into the second gas flow 1233 can withCorresponding described second gas flow 1233 in venturi 1234 positions of described Venturi tube structureInner wall position place produce stronger vacuum, thereby can make to be located at second of this positionSensor unit 1237 can be connected by the more firm inwall with the second gas flow 1233.
With reference to Fig. 3, the gas flowmeter providing at the utility model the first specific embodiment100, further, described first sensor unit 1235 and described the second sensor unit1237 can also comprise, have the mass flow sensor of temperature compensation function and have pressureThe differential pressure pick-up of compensate function.
In actual production life, gas flowmeter 100 is inevitable in metering processCan be subject to the impact of surrounding environment, as temperature and pressure etc., owing to being subject to the impact of environment,Described first sensor unit 1235 and described the second sensor unit 1237 can measuredIn journey, there is error. For this reason, in this specific embodiment, in described first sensor unit1235 and described the second sensor unit 1237 in can also arrange and there is temperature compensation functionMass flow sensor and there is the differential pressure pick-up of pressure compensation. Described first passesSensor cell 1235 and described the second sensor unit 1237 are also by temperature, pressure compensation ginsengNumber sends to described the first metering units 131 and the second metering units 133, considers environment benefitThe data that calculate after repaying are more accurate, reduce the impact of environmental factor on measurement result.
The gas flowmeter 100 providing at the utility model the first specific embodiment, furtherGround, described Electronic Control Unit storehouse 130 also comprises: the first redundant memory cell and second standbyPart memory cell, described the first redundant memory cell is used for backing up described the first memory cell132 data, described the second redundant memory cell is used for backing up described the second memory cell 134Data.
In actual production life, often find to damage because of memory the feelings that cause loss of dataCondition, in order to ensure the security of data, in this specific embodiment, respectively to the first storageUnit 132 and the second memory cell 134 arrange the memory cell of backup, to guarantee data peaceQuan Xing, even if all right when the first memory cell 132 and/or the second memory cell 134 are damagedFrom with their backup memory cell obtain accurate data.
With reference to Fig. 1, the gas flowmeter providing at the utility model the first specific embodiment100, further, described flowmeter main body 120 also comprises: valve 124, described valve124 are arranged between described the first gas flow 1232 and described intake interface 121 near instituteState the position of intake interface 121. In the low electricity of described gas flowmeter, arrearage or appearanceWhen fault can not normally be measured, close described valve, can effectively prevent potential safety hazard.
The gas flowmeter 100 providing at the utility model the first specific embodiment, furtherGround, described the first memory cell 132 and the second memory cell 134 are by wire and described aobviousShow that unit 136 connects.
In this specific embodiment, described the first memory cell 132 and the second memory cell 134The gas of described the first memory cell 132 and the second memory cell 134 being stored by wireTotal amount value send described display unit 136 to. Described wire can comprise various have goodThe plain conductor of electric conductivity and shielded cable, preferably, in use adopt screenCover cable and connect described the first memory cell 132 and the second memory cell 134 and demonstration listUnit 136.
With reference to Fig. 2 and Fig. 3, the gas flow providing at the utility model the first specific embodimentAmount meter 100, further, described gas flowmeter 100 can also comprise: a fluid is wholeStream device 125, described fluid rectifier 125 is arranged at described the first gas flow 1232 and instituteState between intake interface 121, described fluid rectifier 125 will be for flowing into described gas flowThe gas in road 123 is shunted, and makes a wherein part flow into described the first gas flow 1232,Remaining portion gas flows into described the second gas flow 1233.
Described fluid rectifier 125 has flow through gas flow pattern in described gas pipeline of combingEffect, can change and enter the first gas flow by adjusting described fluid rectifier 1251232 and the ratio of the second gas flow 1233 gases. In specific operation process, can lead toCross debugging and obtain the gas distribution ratio requiring.
The gas flowmeter 100 providing at the utility model the first specific embodiment, furtherGround, the first metering units 131 described in described gas flowmeter 100 and described the second meteringUnit 133 can also comprise proportional compensation device. Described proportional compensation device is whole according to described fluidThe shunt ratio of stream device 125 is to described the first metering units 131 and described the second metering unitsThe 133 real gas total amount value that calculate compensate, and make described the first metering units 131The gas gross value institute that equals to flow through after the compensation calculating with described the second metering units 133State the gas gross value of gas flow 123.
According to the shunt ratio of fluid rectifier 125, by the first metering units 131 with described inThe real gas total amount value that the second metering units 133 obtains compensates, by showing firstGas gross value in memory cell 132 or the second memory cell 134 after compensation just can realizeReading of total gas flow rate value to the gas flow 123 of flowing through. To flowmeter main body 120In the first metering units 131 or the first memory cell 132 when safeguarding or keeping in repair, gasFlowmeter body 100 can show the gas gross value of the second gas flow 1233, thus shadow notRing the function of measuring of gas flowmeter 100. In like manner, when the second metering units 133 or the secondWhen memory cell 134 needs to safeguard or keeps in repair, gas flowmeter 100 can show the first gasThe gas gross value of body runner 1232. By switching the first gas flow 1232 or the second gasThe reading of body runner 1233, can gas metering system carry out field maintenance or detect time,Do not need to suspend or change gas flowmeter 100.
In this specific embodiment, further, described fluid rectifier 125 is to flowing into instituteThe gas of stating gas flow 123 carries out equal proportion shunting, makes to enter described the first gas flow1232 equate with the gas flow of described the second gas flow 1233. Adopt shunting in proportionConveniently compensate computing.
In sum, the gas flowmeter that adopts the utility model to provide, can directly exportElectronic signal, without external data conversion equipment, saves installation and maintenance cost. Meanwhile, existOn existing gas flowmeter basis, be provided with two gas flows, two gas flow correspondences twoOrganize separate gas metering system, when needs carry out one group of gas metering system whereinWhen field maintenance or detection, other one group of gas metering system can also normally be worked. Meanwhile,Two sensors are positioned at different air flues, can, via the data of both independent measurement gained, carry outContrast, to judge the pollution condition of sensor. When both Data Comparisons and initial data have poorDifferent, can send to pollute and report to the police, indicating instrument is safeguarded. Thereby, solve in prior art singleThe difficulty of gas metering system installation and maintenance needs greatly and in the time that needs carry out field maintenance or detectSuspend or change the technical problem of gas flowmeter.
It should be noted that, each embodiment in this description all adopts the mode of going forward one by one to retouchState, what each embodiment stressed is and the difference of other embodiment that each is realExecute between example identical similar part mutually referring to.
The foregoing is only preferred embodiment of the present utility model, be not limited to thisUtility model, for a person skilled in the art, the utility model can have more variousChange and change. All within spirit of the present utility model and principle, any amendment of doing,Be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model. Should noteMeaning represents similar terms in: similar label and letter accompanying drawing below, therefore, onceIn an a certain Xiang Yi accompanying drawing, be defined, in accompanying drawing subsequently, do not need it to enterOne step definition and explanation.
In description of the present utility model, it should be noted that, term " " center ", " on ",The orientation of the instruction such as D score, " left side ", " right side ", " vertically ", " level ", " interior ", " outward " or positionPutting pass is based on orientation shown in the drawings or position relationship, or this utility model productThe orientation of usually putting when use or position relationship are only the utility model for convenience of descriptionAnd simplified characterization, instead of device or the element of instruction or hint indication must have specificallyOrientation, with specific orientation structure and operation, therefore can not be interpreted as of the present utility modelRestriction. In addition, term " first ", " second ", " the 3rd " etc. are only for distinguishing description, andCan not be interpreted as instruction or hint relative importance.
In description of the present utility model, also it should be noted that, unless separately there are clear and definite ruleDetermine and limit, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly,For example, can be to be fixedly connected with, can be also to removably connect, or connect integratedly; CanTo be mechanical connection, it can be also electrical connection; Can be to be directly connected, in also can passing throughBetween medium be indirectly connected, can be the connection of two element internals. Common for this areaTechnical staff, can concrete condition understands concrete in the utility model of above-mentioned termImplication.
Claims (10)
1. a gas flowmeter, is characterized in that, comprising: housing, flowmeter main body andElectronic Control Unit storehouse, described housing is arranged at outside described flowmeter main body, described electronics controlAssembly processed storehouse is arranged on described housing, and described flowmeter main body comprises, intake interface, goes outGas interface and described intake interface and described in the gas flow of giving vent to anger between interface, described inIntake interface with described in the interface of giving vent to anger be arranged on the same side of described gas flowmeter, instituteState in gas flow and be provided with the first gas flow and the second gas flow, gas is describedIn one gas flow, flow direction is identical with gas flow direction in described gas flow, instituteThe space of stating between the first gas flow and described gas flow forms described the second gas flowRoad, is provided with first sensor unit in described the first gas flow, described first sensorUnit is for measuring the gas flow parameter of described the first gas flow of flowing through, described the second gasIn body runner, be provided with the second sensor unit, described the second sensor unit is used for measuring streamThrough the gas flow parameter of described the second gas flow, described Electronic Control Unit storehouse comprisesOne metering units, the first memory cell, the second metering units, the second memory cell and demonstrationUnit, described the first metering units is connected with described first sensor unit for calculating flows throughThe total amount value of described the first gas flow gas, described the second metering units and described second passesSensor cell connects the total amount value for calculating described the second gas flow gas of flowing through, described inThe first memory cell is the total amount value through described the first gas flow gas for storage flow, described inThe second memory cell is the total amount value through described the second gas flow gas for storage flow, described inThe first memory cell is connected with described display unit with the second memory cell, described display unitShow the total amount value of gas in described the first memory cell and/or the second memory cell.
2. gas flowmeter as claimed in claim 1, is characterized in that: described the first gasRunner is a Venturi tube structure, and described first sensor unit is arranged at described Venturi tube structureVenturi position, described the second sensor unit be arranged at described the second gas flow inWall position.
3. gas flowmeter as claimed in claim 1, is characterized in that: described the first sensingDevice unit and described the second sensor unit comprise having the mass flow of temperature compensation functionSensor and there is the differential pressure pick-up of pressure compensation.
4. gas flowmeter as claimed in claim 1, is characterized in that described Electronic ControlAssembly storehouse also comprises: the first redundant memory cell and the second redundant memory cell, described firstRedundant memory cell is for backing up the data of described the first memory cell, and described the second backup is depositedStorage unit is for backing up the data of described the second memory cell.
5. gas flowmeter as claimed in claim 1, is characterized in that described flowmeter masterBody also comprises: valve, described valve is arranged at described the first gas flow and described air inlet connectingThe position of close described intake interface between mouthful.
6. gas flowmeter as claimed in claim 1, is characterized in that: described the first storageUnit is connected with described display unit by wire with the second memory cell.
7. gas flowmeter as claimed in claim 6, is characterized in that: described wire is screenCover cable.
8. gas flowmeter as claimed in claim 1, is characterized in that, also comprises: first-classBody rectifier, described fluid rectifier is arranged at described the first gas flow and described air inlet connectingBetween mouthful, described fluid rectifier is used for the gas that flows into described gas flow to shunt,Make a wherein part flow into described the first gas flow, remaining portion gas flows into described secondGas flow.
9. gas flowmeter as claimed in claim 8, is characterized in that: described the first meteringUnit and described the second metering units comprise proportional compensation device, and described proportional compensation device is according to instituteState the shunt ratio of fluid rectifier to described the first metering units and described the second metering unitsThe real gas total amount value calculating compensates, make described the first metering units with described inThe gas gross value described gas flow that equals to flow through after the compensation that the second metering units calculatesGas gross value.
10. gas flowmeter as claimed in claim 8, is characterized in that: control and enter instituteThe gas flow rate of stating the first gas flow and described the second gas flow, makes described gas flow rateBe no more than 20m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520932042.9U CN205246143U (en) | 2015-11-19 | 2015-11-19 | Gas metering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520932042.9U CN205246143U (en) | 2015-11-19 | 2015-11-19 | Gas metering |
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| CN205246143U true CN205246143U (en) | 2016-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300460A (en) * | 2015-11-19 | 2016-02-03 | 卓度计量技术（深圳）有限公司 | Gas flow meter and gas flow display method |
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2015
- 2015-11-19 CN CN201520932042.9U patent/CN205246143U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300460A (en) * | 2015-11-19 | 2016-02-03 | 卓度计量技术（深圳）有限公司 | Gas flow meter and gas flow display method |
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