CN110243424A - Complicated gas flow measurement device and the method for controlling flow using it - Google Patents
Complicated gas flow measurement device and the method for controlling flow using it Download PDFInfo
- Publication number
- CN110243424A CN110243424A CN201910670500.9A CN201910670500A CN110243424A CN 110243424 A CN110243424 A CN 110243424A CN 201910670500 A CN201910670500 A CN 201910670500A CN 110243424 A CN110243424 A CN 110243424A
- Authority
- CN
- China
- Prior art keywords
- gas
- conveyance conduit
- measurement device
- gas flow
- flow measurement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
Abstract
The invention discloses a kind of complicated gas flow measurement devices, including including conveyance conduit, gas outlet, thermal mass flow meter, gas returning port, wherein gas outlet, thermal mass flow meter, gas returning port passes sequentially through pipeline connection, form sample lines, tested gas enters conveyance conduit, complicated gas, which reaches, generates pressure difference at conveyance conduit trunnion, a part of gas of pressure differential is shunted from conveyance conduit, into sample lines, in sample lines, complicated gas completes flow measurement by thermal mass flow meter, and conveyance conduit is returned from gas returning port, complete sampling conduit flow measurement, according to Bernoulli equation, to calculate conveyance conduit flow.Complicated gas flow measurement device of the invention has extremely strong filtration to the noise of high frequency, so the numerical value of output is more steady.
Description
Technical field
The invention belongs to field of flow measurement, and in particular to a kind of complexity gas flow measurement apparatus and its measurement method.
Background technique
In many industrial processes such as metallurgical industry production, tobacco leaf production, need to measure the flow of gas,
And contain material, dust in most of gas, and high temperature, high humidity, thus it is more demanding to measuring device, it generally adopts at this stage
Differential pressure type sensor is taken to measure, however differential pressure type sensor is affected by what is fluctuated in air supply duct, and due to gas
It is mingled with various materials, dust in stream, causes the property of fluid inhomogenous, use for a long time, material, dust is contained in gas, is led
The blocking of differential pressure type sensor is caused, differential pressure type sensor measurement is unstable, measurement data inaccuracy.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of complicated gas flow measurement device, is suitble to gas containing material, dust-laden
Gas, high-temperature gas, high humidity gas measuring wind speed, measurement data is stable, response is rapid, easy to maintain, and it is wider to be suitable for occasion.
To achieve the above object, the present invention provides a kind of complicated gas flow measurement device, including conveyance conduit 1, hot type matter
Amount flowmeter 2, conveyance conduit 1 are first to shrink the pipeline being then gradually expanded, and the position before the contraction of 1 caliber of conveyance conduit is opened
A gas returning port 4 is opened in one gas outlet 3, the position after 1 caliber of conveyance conduit is retracted to most narrow place's trunnion portion, gas outlet 3,
Thermal mass flow meter 2, gas returning port 4 pass sequentially through pipeline connection, form sample lines, and tested gas enters conveyance conduit 1, multiple
Miscellaneous gas reaches and generates pressure difference at conveyance conduit trunnion, and a part of gas of pressure differential is shunted from conveyance conduit, into sampling pipe
Road, in sample lines, complicated gas completes flow measurement by thermal mass flow meter 2, and returns to delivery pipe from gas returning port 4
Sampling conduit flow measurement is completed, according to Bernoulli equation, to calculate conveyance conduit flow in road.
Further, conveyance conduit 1 is Venturi tube.
Further, which further includes by strainer 5, gas outlet 3, strainer 5, thermal mass flow
Meter 2, gas returning port 4 pass sequentially through pipeline connection, form sample lines, and complicated gas is by sampling conduit, when passing through strainer 5,
Bulky grain is effectively intercepted, and filtered air-flow is more stable, and filtered gas completes flow by thermal mass flow meter 2
Measurement.
Further, strainer 5 is 18 mesh to the strainer between 5000 mesh, 115 microns to 2.6 micron ranges or more of particle
It is effectively intercepted, obtains better filter effect.
Further, strainer 5 is the strainer of 3000 mesh, and 5 microns or more of particle is effectively intercepted, and obtains better filtering
Effect.
Further, which further includes automatic cleaning system 6, which passes through
Pipeline is connect with strainer 5, and in the work of complicated gas flow measurement device, automatic cleaning system 6 is in normally off, works as needs
When clearing up strainer 5, start automatic cleaning system 6, strainer 5 is cleared up, to prevent from using for a long time, complicated gas
Material, dust in body etc. block strainer 5.
Further, automatic cleaning system 6 is air pump, can generate compressed air, is carried out by compressed air to strainer 5
Cleaning.
Further, which further includes plenum chamber 7 and temperature and humidity probe 8, and plenum chamber 7 passes through pipe
Road connect to form sample lines with strainer 5, thermal mass flow meter 2, and temperature and humidity probe 8 is mounted in plenum chamber 7, so as to
The measurement of temperature and humidity is carried out to the air-flow in plenum chamber 7.
Further, which further includes display screen 9, and display screen 9 can be by thermal mass flow
The measurement result that meter 2, temperature and humidity probe 8 transmit is shown after being converted by electric signal.
The method for carrying out control flow using above-mentioned complicated gas flow measurement device is as follows:
(1), gas containing material is passed through into conveyance conduit 1 by pipeline；
(2), according to the gas flow in 2 measurement result of thermal mass flow meter conversion conveyance conduit；
(3), according to actual needs, the gas flow in conveyance conduit is controlled by flow control switch.
The beneficial effects of the present invention are, the complicated gas flow measurement device of the invention uses thermal mass flow meter,
Thermal mass flow meter output is root-mean-square value, has extremely strong filtration to the noise of high frequency, so the numerical value of output
It is more steady, in contrast, pressure difference sensor output is instantaneous value, there is relatively high bandwidth for response band,
Other than being able to reflect actual airflow signal, the interference by noise is also more obvious, and output numerical value fluctuation is larger.Meanwhile by
The influence of blower or air supply duct, the air-flow in gas circuit are usually present fluctuation, and this fluctuation can all be rung in any sensor
Answer, and the present invention is by sampling conduit, influenced by blower or air supply duct it is smaller, while be mingled in complicated gas material,
Dust etc. causes the property of fluid inhomogenous, and pressure difference sensor will receive influence, and this system sensor front end joined
Device is filtered, so that the fluid uniformity by thermal mass flow meter is higher, the noise that when measurement generates is smaller.
So complicated gas flow measurement device measurement numerical stability is much higher than conventional measurement systems such as pressure difference measurements.
Detailed description of the invention
The complicated gas flow measurement device structure chart of Fig. 1 present invention
Fig. 2 is the complicated gas flow measurement device structure chart that the present invention has strainer；
Fig. 3 is the complicated gas flow measurement device schematic diagram of the present invention；
In figure:
1- conveyance conduit, 2- thermal mass flow meter, the gas outlet 3-, 4- gas returning port, 5- strainer, 6- cleaning system, 7- plenum chamber,
8- temperature and humidity probe.
Specific embodiment
Below by specific embodiment, the specific technical solution of the present invention is illustrated.
Embodiment 1
The present invention is a kind of complicated gas flow measurement device, is illustrated with 1 structural schematic diagram of attached drawing, complicated gas flow measurement
Device includes conveyance conduit 1, thermal mass flow meter 2, and conveyance conduit 1 is first to shrink the pipeline being then gradually expanded, in delivery pipe
A gas outlet 3 is opened in position before 1 caliber of road is shunk, the position after 1 caliber of conveyance conduit is retracted to most narrow place's trunnion portion
A gas returning port 4 is set out, gas outlet 3, thermal mass flow meter 2, gas returning port 4 pass sequentially through pipeline connection, form sample lines,
Tested gas enters conveyance conduit 1, and complicated gas reaches and generates pressure difference at conveyance conduit trunnion, a part of gas of pressure differential from
Conveyance conduit shunts, and into sample lines, gas enters thermal mass flow meter 2 and completes flow measurement, and returns from gas returning port 4
Conveyance conduit completes sampling conduit flow measurement, according to Bernoulli equation, to calculate conveyance conduit flow.
Embodiment 2
The present invention is a kind of complicated gas flow measurement device, is illustrated with 2 structural schematic diagram of attached drawing, complicated gas flow measurement
Device includes Venturi tube, strainer 5, and thermal mass flow meter 2, Venturi tube is first to shrink the pipeline being then gradually expanded, in text
A gas outlet 3 is opened in position before the caliber of venturi is shunk, the caliber of Venturi tube be retracted to most narrow place's trunnion portion it
A gas returning port 4 is opened in position afterwards, and gas outlet 3, strainer 5, thermal mass flow meter 2, gas returning port 4 pass sequentially through pipeline connection,
Sample lines are formed, tested gas enters Venturi tube, and complicated gas, which reaches, generates pressure difference, pressure differential at conveyance conduit trunnion
A part of gas is shunted from conveyance conduit, into sample lines, in sample lines, is tested gas and is passed through strainer 5, bulky grain quilt
Effectively intercepting, filtered air-flow is more stable, and filtered gas enters thermal mass flow meter 2 and completes flow measurement, and
Conveyance conduit is returned from gas returning port 4, sampling conduit flow measurement is completed, according to Bernoulli equation, to calculate conveyance conduit
Flow.
Embodiment 3
As shown in Fig. 3, compared with Example 1, the different place of embodiment 2 is that an automatic cleaning is mounted in the present embodiment
System 6, the automatic cleaning system are air pump, can generate high pressure gas, which passes through triple valve, pipeline and strainer 5 and heat
Formula mass flowmenter 2 connects, and the triple valve that is connected with air pump is in normally off all the way, when complicated gas flow measurement device stops
When work, the valve all the way of air pump is opened, booster air pump generates high pressure gas, carries out high pressure air blowing to strainer 5, will be attached to filter
Material, dust on net 5 are cleared up.
Embodiment 4
As shown in Fig. 3, the method for carrying out control flow using above-mentioned complicated gas flow measurement device is as follows:
(1), gas containing material is passed through into conveyance conduit 1 by pipeline；
(2), according to the gas flow in 2 measurement result of thermal mass flow meter conversion conveyance conduit；
(3), according to actual needs, the gas flow in conveyance conduit is controlled by flow control switch.
The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, several improvement can also be made without departing from the principle of the present invention, it is all according to
According to technical spirit any trickle amendment, equivalent replacement and improvement to the above embodiments of the invention, this should be included in
Within the protection scope of inventive technique scheme.
Claims (10)
1. a kind of complexity gas flow measurement device, including conveyance conduit (1), thermal mass flow meter (2), conveyance conduit (1) are
The pipeline being then gradually expanded first is shunk, a gas outlet (3) is opened in the position before the contraction of conveyance conduit (1) caliber, defeated
Open a gas returning port (4), gas outlet (3), thermal mass stream in position after sending pipeline (1) caliber to be retracted to most narrow place's trunnion portion
Meter (2), gas returning port (4) pass sequentially through pipeline connection.
2. complexity gas flow measurement device according to claim 1, which is characterized in that conveyance conduit (1) is Venturi tube.
3. complexity gas flow measurement device according to claim 1, which is characterized in that further include strainer (5), gas outlet
(3), strainer (5), thermal mass flow meter (2), gas returning port (4) pass sequentially through pipeline connection.
4. complexity gas flow measurement device according to claim 3, which is characterized in that strainer (5) is 18 mesh to 5000 mesh
Between strainer.
5. complexity gas flow measurement device according to claim 4, which is characterized in that strainer (5) is the strainer of 3000 mesh.
6. complexity gas flow measurement device according to claim 3, which is characterized in that it further include automatic cleaning system (6),
The automatic cleaning system (6) is connect by pipeline with strainer (5).
7. complexity gas flow measurement device according to claim 6, which is characterized in that automatic cleaning system (6) is air pump.
8. -7 any complicated gas flow measurement device according to claim 1, which is characterized in that the complexity gas flow is surveyed
Measuring device further includes plenum chamber (7) and temperature and humidity probe (8), and plenum chamber (7) passes through pipeline and strainer (5), thermal mass flow meter
(2) connection forms sample lines, and temperature and humidity probe (8) is mounted in plenum chamber (7), carries out temperature to the air-flow in plenum chamber (7)
The measurement of degree and humidity.
9. complexity gas flow measurement device according to claim 8, which is characterized in that further include display screen (9).
10. a kind of method for carrying out control flow using complicated gas flow measurement device as claimed in claim 9, specific steps are such as
Under:
(1), gas containing material is passed through into conveyance conduit (1) by pipeline；
(2), according to the gas flow in thermal mass flow meter (2) measurement result conversion conveyance conduit；
(3), according to actual needs, the gas flow in conveyance conduit is controlled by flow control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910670500.9A CN110243424A (en) | 2019-07-24 | 2019-07-24 | Complicated gas flow measurement device and the method for controlling flow using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910670500.9A CN110243424A (en) | 2019-07-24 | 2019-07-24 | Complicated gas flow measurement device and the method for controlling flow using it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110243424A true CN110243424A (en) | 2019-09-17 |
Family
ID=67893291
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910670500.9A Pending CN110243424A (en) | 2019-07-24 | 2019-07-24 | Complicated gas flow measurement device and the method for controlling flow using it |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113486609A (en) * | 2021-07-05 | 2021-10-08 | 河南城建学院 | Fluid material conveying device and method based on hydrodynamics Bernoulli principle |
-
2019
- 2019-07-24 CN CN201910670500.9A patent/CN110243424A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113486609A (en) * | 2021-07-05 | 2021-10-08 | 河南城建学院 | Fluid material conveying device and method based on hydrodynamics Bernoulli principle |
| CN113486609B (en) * | 2021-07-05 | 2022-04-19 | 河南城建学院 | Fluid material conveying device and method based on hydrodynamics Bernoulli principle |
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