CN108645459A - A kind of apparatus for measuring air quantity - Google Patents
A kind of apparatus for measuring air quantity Download PDFInfo
- Publication number
- CN108645459A CN108645459A CN201810722831.8A CN201810722831A CN108645459A CN 108645459 A CN108645459 A CN 108645459A CN 201810722831 A CN201810722831 A CN 201810722831A CN 108645459 A CN108645459 A CN 108645459A
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- China
- Prior art keywords
- observing
- air quantity
- controlling bar
- measuring air
- hole
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Classifications
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- 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
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/363—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction with electrical or electro-mechanical indication
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
A kind of apparatus for measuring air quantity, including ontology and intelligent display instrument are measured, further include flow integrator, the measurement ontology is electrically connected with the flow integrator, and the flow integrator is electrically connected with the intelligent display instrument.Can be higher to the fitness of wind pressure and air quantity with real-time display measurement result, it can improve measurement accuracy and measurement efficiency by the way that multiple pitot holes and detection hole are arranged.
Description
Technical field
The present invention relates to fluid measurement technical field more particularly to a kind of apparatus for measuring air quantity.
Background technology
In fluid measurement especially air measuring field, a kind of mean velocity tube flowmeter is often used.Even speed tube stream
Gauge is the measuring principle using Pitot tube, the pressure formed between the total pressure and the static pressure in downstream by measuring block body upstream
Difference, and calculated according to Bernoulli equation, to achieve the purpose that measure flow.
Currently, mean velocity tube flowmeter due to its with simple installation, crushing is small, intensity is high, not frayed influence, No leakage
The advantages that, and as the ideal product of replacement orifice flowmeter.Existing mean velocity tube flowmeter can be widely used for industrial and mining enterprises
The flow measurement of blast furnace gas, compressed air, steam and gas.
But existing mean velocity tube flowmeter is directly electrically connected with display instrument by transmitter in design, causes to show
Measurement data it is not prompt enough, the inefficiency of monitoring.And existing mean velocity tube flowmeter all only with a pitot hole and
One detection hole, since the velocity flow profile in general pipeline is non-uniform, so causing measurement result inaccurate.
It shows not in time for measurement data in the prior art and the problems such as even speed tube traffic statistics are inaccurate, needs
A kind of simple in structure, high-intelligentization, high-precision apparatus for measuring air quantity are provided.
Invention content
To solve the above problems, the present invention adopts the following technical scheme that：A kind of apparatus for measuring air quantity, including measure ontology and
Intelligent display instrument further includes flow integrator, and the measurement ontology is electrically connected with the flow integrator, the flow integrator
It is electrically connected with the intelligent display instrument.
Further, the measurement ontology includes observing and controlling bar and transmitter, and the observing and controlling bar extends vertically through among valve body
On tube wall, the observing and controlling bar is arranged is drilled at least one pitot hole and at least one detection hole in one end of valve inner, described
Pitot hole face air intake vent direction, the detection hole face air outlet direction, the transmitter are fixed on observing and controlling bar and are located at valve body
One end of outside is simultaneously provided with plemum and negative pressure chamber, and the pitot hole is connected to the plemum, the detection hole and negative pressure
Room is connected to, and the transmitter is electrically connected with the flow integrator.
Preferably, the pitot hole is 4, is equidistantly distributed on the observing and controlling bar of valve inner, and the detection hole is 2
It is a, it equidistantly distributes on the observing and controlling bar of valve inner.
Preferably, the observing and controlling bar is hollow metal tube.
Preferably, the valve body is circular pipe or square pipe.
Preferably, further include power controling box, the intelligent display instrument is fixed in power controling box.
Preferably, the power controling box panel is provided with power supply indicator and lock.
Beneficial effects of the present invention are：Easy to operate, structure novel is compact, has air-tightness height, performance stable, aobvious in real time
Show measurement result, measurement efficiency is high, high to the fitness of wind pressure and air quantity, precision and high resolution, inferred-zero drift, range model
Enclose it is optional, be used for a long time stability it is good, it is cost-effective, operation convenient transportation.
Description of the drawings
The invention will be further described for attached drawing, but the embodiment in attached drawing does not constitute any limitation of the invention.
Fig. 1 is measuring device schematic diagram.
Fig. 2 is that reception signal is 0-10V voltage signal distribution maps.
Fig. 3 is the corresponding bound indication range distribution map of signal.
Fig. 4 is setting zero point error correction value and filter factor distribution map.
In figure：Measure ontology 1, intelligent display instrument 2, flow integrator 3, power controling box 4, valve body 5, observing and controlling bar 11, change
Send device 12, pitot hole 111, lock 41, power supply indicator 42.
Specific implementation mode
As shown in fig. 1, a kind of apparatus for measuring air quantity that one embodiment of the invention provides, including measure ontology 1 and intelligence
Display instrument 2 further includes flow integrator 3, and the measurement ontology 1 is electrically connected with the flow integrator 3, the flow integrator
3 are electrically connected with the intelligent display instrument 2.
Such as Fig. 1, air-flow is come in by the valve body 5 from air intake vent, enters 111 fairlead of different pitot holes through high-voltage connecting
Head is sent to the plemum of transmitter 12.It is equipped with one or more detection holes among the back side of observing and controlling bar 11, represents entire cut
The static pressure in face is led to the negative pressure chamber of transmitter 12, square for the differential pressure that positive and negative pressure chamber measures through static pressure fairlead by low-pressure connector
It is directly proportional to the mean flow rate in flow section, the differential pressure relationship directly proportional to flow is obtained from face, flow rate calculation formula is as follows：
Wherein, Qv is volumetric flow of gas；
K is discharge correction coefficient；
D is internal diameter of the pipeline（m）；
P by even speed tube survey gas total head and static pressure it is only poor（Pa）；
ρ is gas density.
Program of the differential pressure signal that transmitter 12 is measured by positive and negative pressure chamber through 3 inside microcontroller of flow integrator calculates
After obtain corresponding flow value, then be converted into 0-10V voltage signals through PWM programs and exported in output port.
Intelligent display instrument 2 will be shown after the 0-10V voltage signals received calculating corresponding with range bound set by user
It shows to come.For example, intelligent display instrument 2 receives the voltage signal of 5v, range set by user is 0-7000, then calculates display
Value is 3500.
Operating process such as Fig. 2 to Fig. 4
（1）It sets and receives signal as 0-10V voltage signals, as shown in Figure 2；
（2）Corresponding bound, that is, the indication range of setting signal, as shown in Figure 3；
（3）Set zero point error correction value（It is corrected when for null offset）And filter factor（Prevent show value saltus step up and down）,
As shown in Figure 4.
In the present embodiment, the measurement ontology 1 includes observing and controlling bar 11 and transmitter 12, and the observing and controlling bar 11 extends vertically through
On 5 intermediate tube wall of valve body, the observing and controlling bar 11 is arranged one end inside valve body 5 and is drilled with pitot hole 111 and detection hole（Do not show
Go out）, pitot hole 111 and detection hole（It is not shown）Can be one or more, 111 face air intake vent direction of the pitot hole,
The detection hole（It is not shown）Face air outlet direction, the transmitter 12 are fixed on one that observing and controlling bar 11 is located at outside valve body 5
It holds and is provided with plemum（It is not shown）And negative pressure chamber（It is not shown）, the pitot hole 111 and the plemum（It is not shown）Even
It is logical, the detection hole（It is not shown）With the negative pressure chamber（It is not shown）Connection, the transmitter 12 and 3 electricity of the flow integrator
Connection.Since each pitot hole 111 communicates, after air-flow is averaged by the stagnation pressure value of pitot hole 111, by stagnation pressure fairlead through height
Crimp head is sent to the plemum of transmitter 12（It is not shown）.One or more detection holes are equipped among the back side of observing and controlling bar 11
（It is not shown）, represent the static pressure of whole cross section.The negative pressure chamber of transmitter 12 is led to by low-pressure connector through static pressure fairlead（Do not show
Go out）, differential pressure that positive and negative pressure chamber measures it is square directly proportional to the mean flow rate in flow section, to obtain differential pressure and flow at
The relationship of direct ratio.By being equidistantly positioned multiple pitot holes 111 and detection hole in observing and controlling bar 11, the air-flow stream of different cross section is collected
Amount promotes the precision of air measuring from face.It can also be then vertically fixed in valve body 5 by increasing another observing and controlling bar 11
5 section of valve body is divided into four equal sections of cellar area by portion in this way, then by boring two stagnation pressures in each observing and controlling bar 11
Hole 111 and detection hole, the air measuring data got in this way are more accurate.
Transmitter in the present embodiment can select common transmitter in the market.
Preferred in this embodiment, the observing and controlling bar 11 is hollow metal tube, enhances the stability of observing and controlling bar.
Preferred in this embodiment, the valve body 5 is circular pipe or square pipe, selects figurate pipe
Road is conducive to the precision for improving air measuring.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of apparatus for measuring air quantity, including measure ontology and intelligent display instrument, it is characterised in that：Further include flow integrator,
The measurement ontology is electrically connected with the flow integrator, and the flow integrator is electrically connected with the intelligent display instrument.
2. a kind of apparatus for measuring air quantity according to claim 1, it is characterised in that：The measurement ontology include observing and controlling bar and
Transmitter, the observing and controlling bar extend vertically through among the valve body on tube wall, and the observing and controlling bar is arranged to be drilled in one end of valve inner
At least one pitot hole and at least one detection hole, the pitot hole face air intake vent direction, the detection hole face air outlet
Direction, the transmitter are fixed on one end that observing and controlling bar is located at outside valve body and are provided with plemum and negative pressure chamber, the stagnation pressure
Hole is connected to the plemum, and the detection hole is connected to the negative pressure chamber, and the transmitter is electrically connected with the flow integrator
It connects.
3. a kind of apparatus for measuring air quantity according to claim 2, it is characterised in that:The pitot hole is 4, equidistant point
For cloth on the observing and controlling bar of valve inner, the detection hole is 2, is equidistantly distributed on the observing and controlling bar of valve inner.
4. a kind of apparatus for measuring air quantity according to claim 2 or 3, it is characterised in that：The observing and controlling bar is hollow gold
Belong to pipe.
5. a kind of apparatus for measuring air quantity according to claim 2 or 3, it is characterised in that：The valve body be circular pipe or
Square pipe.
6. a kind of apparatus for measuring air quantity according to claim 1, it is characterised in that：Further include power controling box, the intelligence
Energy display instrument is fixed in power controling box.
7. a kind of apparatus for measuring air quantity according to claim 6, it is characterised in that：The power controling box panel is provided with
Power supply indicator and lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722831.8A CN108645459A (en) | 2018-07-04 | 2018-07-04 | A kind of apparatus for measuring air quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722831.8A CN108645459A (en) | 2018-07-04 | 2018-07-04 | A kind of apparatus for measuring air quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108645459A true CN108645459A (en) | 2018-10-12 |
Family
ID=63750362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810722831.8A Pending CN108645459A (en) | 2018-07-04 | 2018-07-04 | A kind of apparatus for measuring air quantity |
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| Country | Link |
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| CN (1) | CN108645459A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579247A (en) * | 2019-09-16 | 2019-12-17 | 南华大学 | Telescopic air volume cover for measuring air volume of spherical nozzle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051423A (en) * | 1990-06-23 | 1991-05-15 | 上海机械学院 | Uniform-velocity pipe flowmeter for pipe with rectangular cross-section |
| JP2005003678A (en) * | 2003-05-20 | 2005-01-06 | Nippon Applied Flow Kk | Flow measuring instrument, flow rate measuring instrument, and flow rate instrumentation method |
| CN2798052Y (en) * | 2005-05-27 | 2006-07-19 | 铁岭市光明仪器仪表厂 | Probe type flow sensor |
| CN203704987U (en) * | 2014-03-11 | 2014-07-09 | 济钢集团有限公司 | Differential pressure type flow measuring system |
| CN107976222A (en) * | 2016-10-21 | 2018-05-01 | 中石化洛阳工程有限公司 | A kind of Pitot tube integrated gas mass flow measurement methods |
| CN207300336U (en) * | 2017-08-23 | 2018-05-01 | 朱江 | A kind of people's air defense apparatus for measuring air quantity |
| CN208488130U (en) * | 2018-07-04 | 2019-02-12 | 东莞市益安人防工程有限公司 | A kind of apparatus for measuring air quantity |
-
2018
- 2018-07-04 CN CN201810722831.8A patent/CN108645459A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051423A (en) * | 1990-06-23 | 1991-05-15 | 上海机械学院 | Uniform-velocity pipe flowmeter for pipe with rectangular cross-section |
| JP2005003678A (en) * | 2003-05-20 | 2005-01-06 | Nippon Applied Flow Kk | Flow measuring instrument, flow rate measuring instrument, and flow rate instrumentation method |
| CN2798052Y (en) * | 2005-05-27 | 2006-07-19 | 铁岭市光明仪器仪表厂 | Probe type flow sensor |
| CN203704987U (en) * | 2014-03-11 | 2014-07-09 | 济钢集团有限公司 | Differential pressure type flow measuring system |
| CN107976222A (en) * | 2016-10-21 | 2018-05-01 | 中石化洛阳工程有限公司 | A kind of Pitot tube integrated gas mass flow measurement methods |
| CN207300336U (en) * | 2017-08-23 | 2018-05-01 | 朱江 | A kind of people's air defense apparatus for measuring air quantity |
| CN208488130U (en) * | 2018-07-04 | 2019-02-12 | 东莞市益安人防工程有限公司 | A kind of apparatus for measuring air quantity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579247A (en) * | 2019-09-16 | 2019-12-17 | 南华大学 | Telescopic air volume cover for measuring air volume of spherical nozzle |
| CN110579247B (en) * | 2019-09-16 | 2020-10-16 | 南华大学 | Telescopic air volume cover for measuring air volume of spherical nozzle |
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