CN105136252B - A kind of double Air-chamber type gas-metering devices with metering amendment - Google Patents
A kind of double Air-chamber type gas-metering devices with metering amendment Download PDFInfo
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- CN105136252B CN105136252B CN201510510572.9A CN201510510572A CN105136252B CN 105136252 B CN105136252 B CN 105136252B CN 201510510572 A CN201510510572 A CN 201510510572A CN 105136252 B CN105136252 B CN 105136252B
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- 238000005259 measurement Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000001186 cumulative effect Effects 0.000 claims description 7
- 238000002715 modification method Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 13
- 238000007789 sealing Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 4
- 235000004443 Ricinus communis Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a kind of double Air-chamber type gas-metering devices with metering amendment.Because wet gas flow meter has turn error in measurement；The change of instrument interior sealing liquid height can change the volume of measuring room, and long-term use of stability is poor；The change of temperature and pressure also influences its stability in use environment.The present invention is by using a kind of double Air-chamber type gas-metering devices with metering amendment, because gas in the dividing plate both sides of double air chambers has pressure differential during work, double air chambers can be by push-jump certain angle, absolute rotary encoder is passed to by angular amount transmission mechanism, control system is passed to again, control system obtains temperature, humidity and pressure intensity parameter again, calculate revised gas volume, the science, stability and comparativity of its longtime running the data obtained can be ensured, the gas volume metering being mainly used in laboratory.
Description
Technical field
The present invention relates to technology of instrument and meter field, and in particular to a kind of double Air-chamber type gas dosings with metering amendment
Device.
Background technology
Wet gas flow meter is a kind of fixed displacement volumetric flowmeter, is that measure flow velocity is discontinuous or complicated component
Not by the conventional instrument of the gas flow of sealing fluid absorption, the cumulative amount that it can change over time flow indicates, readings
Reliably, can be used directly to measure gas flow, it is also possible to examine and determine other flowmeters to make reference instrument.But wet gas flow meter
It is complicated, service life is short, and cost of manufacture is high, and installation is complicated；And have unavoidable turn error when measuring, measuring
Error is more prominent during small size gas；The change of instrument interior sealing liquid height can directly change the volume of measuring room, make for a long time
It is poor with stability；The change of temperature and pressure also contributes to the stability in use of wet gas flow meter in environment.
The content of the invention
In view of the deficiencies in the prior art, the present invention proposes a set of solution, there is provided a kind of metering of gas volume and repaiies
Correction method and a kind of double Air-chamber type gas-metering devices with metering amendment.
Technical scheme is as follows：
A kind of metering of gas volume and modification method, it can be in horizontal positioned closed around axial rotation to dispose one first
Cylinder, one piece of dividing plate is disposed with vertically in the closed barrel and is divided into two semicolumn cylinders, will be described closed
The part of cylinder is immersed in water or low-viscosity (mobile) liquid, forms two sealed gas chambers, and the sealed gas chamber is designed with air inlet respectively
Passage and exhaust passage, during operation, two sealed gas chambers are respectively at collection gaseity and exhaust condition, in collection gaseity
Air chamber pressure be slightly above in exhaust condition pressure, formed pressure difference promote closed barrel gradually rotated from extreme position M0
To extreme position M1 (extreme position should ensure that dividing plate all the time more than sealing fluid liquid level), when turning to extreme position, pass through
Changing the state of two sealed gas chambers, the air chamber for collecting gaseity is changed into exhaust condition, and the air chamber of exhaust condition is changed into collecting gaseity,
I.e. state is exchanged, and cylinder is gradually rotated from extreme position M1 to M0, the cumulative angle according to its closed barrel around axial rotation
, then can be according to temperature during measurement and the geometric parameter of sealed gas chamber can calculate the volume in collection gaseity sealed gas chamber
Degree, humidity, pressure intensity parameter are modified to the cumulative volume of metering.
A kind of double Air-chamber type gas-metering devices with metering amendment, its pair of air chamber is by interior rotating cylinder, outer rotaring tube, front side
Plate, back side panel, dividing plate, central dividing plate form closed air chamber, and the interior rotating cylinder and outer rotaring tube are concentric, and part is immersed in water
Or in low-viscosity (mobile) liquid, form 1#Inlet plenum, 1#Measuring room, 2#Inlet plenum, 2#Measuring room；Described 1#Inlet plenum, 2#Inlet plenum edge
For axial laid out in parallel in interior rotating cylinder, centre has central dividing plate to separate；The outer wall of the interior rotating cylinder and inwall, the front side of outer rotaring tube
Measuring room is divided into 1 by plate, back side panel composition measuring room, the dividing plate vertically#Measuring room and 2#Measuring room；Described 1#Air inlet
Room and 1#Measuring room communicates, and described 2#Inlet plenum and 2#Measuring room communicates.
There are Intake shaft and rotary shaft at the axle center of double air chambers, the rotary shaft is hollow circular shaft, passes through front side
Plate, back side panel are fixedly connected with double air chambers；The Intake shaft is located in rotary shaft, have in the Intake shaft two inlet channels and
Two exhaust passages, two inlet channels are respectively with 1#Inlet plenum, 2#Inlet plenum communicates, and two exhaust passages are respectively with 1#Air inlet
Room and 2#Inlet plenum communicates.
Described gas-metering device, in addition to the rotation of shell body, angular amount transmission mechanism, air chamber switching mechanism, absolute type
Encoder, Temperature Humidity Sensor, pressure transducer, control system, the shell body is the dismountable hollow housing of top surface, described
At double air chambers in shell body, shell body is filled with water or low-viscosity (mobile) liquid, seals the Intake shaft and the one of double air chambers in it
Part；The angular amount transmission mechanism is connected with the rotary shaft on double air chambers and absolute rotary encoder respectively；The air chamber
Switching mechanism is connected with two inlet channels in the Intake shaft and two exhaust passages；The Temperature Humidity Sensor, pressure
Strong sensor is arranged on described 1#Inlet plenum, 2#In inlet plenum；The absolute rotary encoder, Temperature Humidity Sensor, pressure pass
The control line of sensor accesses the control system.
Beneficial effects of the present invention：
The present invention is compared with wet gas flow meter：Due to double air chamber regular shapes, turn error pair can be significantly eliminated
The influence of metering；All the time reciprocally swinging between extreme position M0, M1, and M0, M1 be not with sealing when being moved due to double air chambers
The decline of liquid liquid level and change, therefore the change of sealing fluid liquid level is not significantly affected by measuring accuracy；Using sensor to meter
Amount volume is modified the science for also ensureing its longtime running the data obtained, stability and comparativity, is mainly used in experiment
Indoor gas volume metering.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is double air chamber structure schematic diagrames in the present invention.
Fig. 3 is Fig. 2 A-A sectional views.
Fig. 4 is Fig. 2 B-B sectional views.
Fig. 5 is Fig. 2 A-A three-dimensional cutaway views.
Fig. 6 is Fig. 2 B-B three-dimensional cutaway views.
In accompanying drawing：1. pair air chamber；2. Temperature Humidity Sensor；3. pressure transducer；4. shell body；5. angular amount transmission mechanism；
6. absolute rotary encoder；7. air chamber switching mechanism；8. Level tune castor；101. rotary shaft；102. Intake shaft；103. enter
Gas passage；104. exhaust passage；201. outer rotaring tube；Rotating cylinder in 202.；203. 1#Measuring room；204. dividing plate；205. 2#Metering
Room；206. water or low-viscosity (mobile) liquid；207. 2#Inlet plenum；208. central dividing plate；209. 1#Inlet plenum；210. back side panel；211.
Front side board.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
A kind of double Air-chamber type gas-metering devices with metering amendment, its pair of air chamber is by interior rotating cylinder 202, outer rotaring tube
201st, front side board 211, back side panel 210, dividing plate 204, central dividing plate 208 form closed air chamber, interior rotating cylinder 202 and outer rotaring tube
201 is concentric, and is partly immersed in water or low-viscosity (mobile) liquid 206, has central dividing plate 208 parallel among interior rotating cylinder 202
Set up in front side board or back side panel and separate interior rotating cylinder for 1#Inlet plenum 209 and 2#Inlet plenum 207；The outer wall of interior rotating cylinder 202 with
Inwall, front side board 211, the back side panel 210 of outer rotaring tube 201 form measuring room, and dividing plate 204 is set up and separates measuring room vertically
For 1#Measuring room 203 and 2#Measuring room 205；And 1#Inlet plenum 209 and 1#Measuring room 203 communicates, and 2#Inlet plenum 207 and 2#Measuring room
205 communicate.
Two inlet channels 103 of Intake shaft 102 are respectively connected to 1#Inlet plenum 209 and 2#Inlet plenum 207, Intake shaft 102
Two exhaust passages 104 are respectively connected to 1#Inlet plenum 209 and 2#Inlet plenum 207, makes 1#Inlet plenum 209 and 2#Inlet plenum 207 is each
There are an inlet channel and exhaust passage；Two inlet channels 103 of Intake shaft 102 and the other end of two exhaust passages 104
Then access air chamber switching mechanism 7.
Air chamber switching mechanism 7 is combined by several electromagnetic valves, and it is two inlet channels 102 and two of control that it, which is acted on,
The break-make of individual exhaust passage 104, specific control are as follows：When 1#The inlet channel 103 and 2 of inlet plenum 209#The exhaust of inlet plenum 207
When passage 104 is opened, 1#The exhaust passage 104 and 2 of inlet plenum 209#The inlet channel 103 of inlet plenum 207 is closed mode；Instead
It, when 1#The inlet channel 103 and 2 of inlet plenum 209#When the exhaust passage 104 of inlet plenum 207 is closed, 1#The row of inlet plenum 209
Gas passage 104 and 2#The inlet channel 103 of inlet plenum 207 is open mode.
Angular amount transmission mechanism 5 is gear drive, and rotary shaft 101 and absolute rotary encoder 6 are connected.
Temperature Humidity Sensor 2 is arranged in 1#Inlet plenum 209 and 2#In inlet plenum 207, detect metering process in temperature with it is wet
Degree；Pressure transducer 3 is arranged in 1#Inlet plenum 209 and 2#In inlet plenum 207, the pressure in metering process is detected.
In use, being adjusted the gas-metering device to level by horizontal castor 8, the volume of double air chambers about 2/3 is sunk
It is immersed in water or the liquid of low viscosity, gas is by 1#Inlet plenum 209 enters 1#In measuring room 203 or by 2#Inlet plenum 207 enters
Enter 2#Measuring room 205 so that when an air chamber is in collection gaseity, another air chamber is then in exhaust condition.
During work, because gas in the both sides of dividing plate 204 of double air chambers has pressure differential, double air chambers are promoted, from limit position
Put M0 and gradually move to extreme position M1 (extreme position M0, M1 ensure dividing plate all the time more than sealing fluid liquid level), pass through angular amount
The rotary motion of rotary shaft 101 is passed to absolute rotary encoder 6 by transmission mechanism 5, and passes to control system, control system
System is modified, to the gas volume calculated in the present embodiment preferably further according to the temperature of acquisition, humidity, pressure information
Use following two kinds of methods：
(1) the first modification method：Because body of the gas of the amount with same substance under different temperatures, pressure status
Product is different, in meter gaseous volume, monitors pressure, the temperature data of gas, and use following correction formula：Correct to the volume of gas under the status of criterion, ensure the science of metered volume, stability and can
It is comparative.V in formula2For revised volume, V1For without the volume detected of amendment, unit L；t1For in gas collection
Measurement temperature in the air chamber of state, unit are DEG C；P0For the atmospheric pressure under the status of criterion, P1For the gas in collection gaseity
Measurement pressure in room, unit Pa.
(2) second of modification method：This modification method can be used for requiring to measure the volume of not steam-laden dry gas
In the case of, relative humidity φ, the pressure P of gas during monitoring and meterings, and utilize correction formula：Formula
Middle VgFor the dry gas volume of metering, VsFor the humid gas volume of metering, relative humidity when φ is measurement, PbDuring to measure
The partial pressure of saturated steam, PsFor the stagnation pressure of humid gas.
When double air chambers turn to extreme position M1 or M0, control system makes double air chambers with phase by air chamber switching mechanism 7
Anti- state operation (measuring room of gas collection starts to be vented, and the measuring room of exhaust starts gas collection), into next measuring room gas collection
Measurement process.The two processes are repeated, control system will be each during volume data it is cumulative when can be to realize long
The on-line metering of phase.
Described control system is made up of multiple single-chip microcomputers and peripheral circuit, and the major function of control system includes：In the future
Volume is converted into from the angle information of absolute rotary encoder, and according to Temperature Humidity Sensor, the signal of pressure transducer,
Volume is modified；Control system can also record change of the gas flow with the time in addition to record gas flow is with the accumulation of time
Rate is factor of created gase；Control air chamber switching mechanism realizes the switching of air chamber state；History continuous data is checked, gas statistics is multiple
Position.
Claims (5)
1. metering and the modification method of a kind of gas volume, methods described include：It can be in water around axial rotation to dispose one first
The closed cylinder of placing flat, one piece of dividing plate is disposed with vertically in the closed barrel and is divided into two semicircle column casings
Body, the part of the closed barrel is immersed in water, forms two sealed gas chambers, the sealed gas chamber is designed with air inlet respectively
Passage and exhaust passage, during operation, two sealed gas chambers are respectively at collection gaseity and exhaust condition, according to its closed cylinder
Body calculates the volume in collection gaseity sealed gas chamber around the angle of axial rotation and the geometric parameter of the sealed gas chamber, and
According to the temperature of sealed gas chamber, humidity, pressure intensity parameter are modified to the cumulative volume of metering under collection gaseity during measurement.
2. metering and the modification method of a kind of gas volume according to claim 1, to the cumulative volume of metering using following
Correction formula is modified：, in formulaFor revised volume,For detecting without amendment
Volume,For in collection gaseity air chamber in measurement temperature, unit for degree Celsius,For the atmospheric pressure under the status of criterion
By force, unit is pa；For the measurement pressure in the air chamber in collection gaseity, unit is pa.
3. metering and the modification method of a kind of gas volume according to claim 1, to the cumulative volume of metering using following
Steam-laden humid gas volume is adapted to the dry gas volume of anhydrous steam by correction formula：, formula
InV g For the dry gas volume of metering,V s For the humid gas volume of metering,Relative humidity during to measure,P b During to measure
The partial pressure of saturated steam,P s For the stagnation pressure of humid gas.
4. a kind of a kind of double Air-chamber type gas-metering devices with metering amendment for realizing Claims 2 or 3 methods described, its
Double air chambers are made up of closed air chamber interior rotating cylinder, outer rotaring tube, front side board, back side panel, dividing plate, central dividing plate, it is characterised in that：
The interior rotating cylinder and outer rotaring tube are concentric, and part is immersed in water, form 1#Inlet plenum, 1#Measuring room, 2#Inlet plenum, 2#Meter
Measure room；Described 1#Inlet plenum, 2#For laid out in parallel in interior rotating cylinder, centre has central dividing plate to separate to inlet plenum vertically；Turn in described
Measuring room is divided into 1 by the outer wall of cylinder and the inwall of outer rotaring tube, front side board, back side panel composition measuring room, the dividing plate vertically#
Measuring room and 2#Measuring room；Described 1#Inlet plenum and 1#Measuring room communicates, and described 2#Inlet plenum and 2#Measuring room communicates.
5. gas-metering device according to claim 4, wherein also having Intake shaft and rotation at the axle center of double air chambers
Axle, the rotary shaft are hollow circular shaft, are fixedly connected by front side board, back side panel with double air chambers；The Intake shaft, which is located at, to be turned
There are two inlet channels and two exhaust passages in moving axis, in Intake shaft, two inlet channels are respectively with 1#Inlet plenum, 2#Air inlet
Room communicates, and two exhaust passages are respectively with 1#Inlet plenum and 2#Inlet plenum communicates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510510572.9A CN105136252B (en) | 2015-08-19 | 2015-08-19 | A kind of double Air-chamber type gas-metering devices with metering amendment |
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| CN201510510572.9A CN105136252B (en) | 2015-08-19 | 2015-08-19 | A kind of double Air-chamber type gas-metering devices with metering amendment |
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| CN105136252B true CN105136252B (en) | 2018-02-16 |
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| CN109142642B (en) * | 2018-09-30 | 2024-03-12 | 安徽工业大学 | Quick sensing device and sensing method for gas concentration |
| CN112345707B (en) * | 2020-11-16 | 2021-10-29 | 湖南碧臣环境能源有限公司 | Gas measuring device |
| CN113252125B (en) * | 2021-05-25 | 2023-08-25 | 宜宾机电一体化研究所 | Wet-type gas flowmeter with high measurement accuracy and metering drum rotation mechanism |
| CN115770631B (en) * | 2022-12-07 | 2023-08-15 | 深圳市恒永达科技股份有限公司 | Environment-adaptive air type liquid transfer pump and control method thereof |
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