CN206695848U - Continuous purging block-resistant type apparatus for measuring air quantity - Google Patents
Continuous purging block-resistant type apparatus for measuring air quantity Download PDFInfo
- Publication number
- CN206695848U CN206695848U CN201720358800.XU CN201720358800U CN206695848U CN 206695848 U CN206695848 U CN 206695848U CN 201720358800 U CN201720358800 U CN 201720358800U CN 206695848 U CN206695848 U CN 206695848U
- Authority
- CN
- China
- Prior art keywords
- pressure
- bar
- pipe
- air
- pressure bar
- 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.)
- Active
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
It the utility model is related to air measuring technical field, a kind of specifically continuous purging block-resistant type apparatus for measuring air quantity, the first pressure bar and the second pressure bar are respectively equipped with total head pressure pipe and static pressure pressure pipe, total head pressure pipe and static pressure pressure pipe side are equipped with air inlet, two air inlets connect air chest by pipeline respectively, two spinner flowmeters and a pressure-reducing valve are provided with air chest, by connection pressure difference transmitter, the other end of the first pressure bar and the second pressure bar is respectively equipped with pressure compensation structure for one end of first pressure bar and the second pressure bar.The utility model compared with the existing technology, combining structure simple possible, is easily installed and dismantled, the advantage is that：Pressure pipe is continuously purged using compressed air, thoroughly prevents dusty gas and enters pressure pipe, reaches reliable anti-blocking effect；By installing autocompensation installation additional in pressure pipe, to eliminate influence of the change for purging pressure, flow to differential pressure measurement, reach the effect accurately measured.
Description
[technical field]
Air measuring technical field is the utility model is related to, specifically a kind of continuous purging block-resistant type air measuring dress
Put.
[background technology]
In industrial circle, the combination property of wind speed measuring device is considered, what air measuring during high wind speed used substantially
All it is differential pressure flowmeter, and it is also less for the metering system of low flow velocity air quantity, in addition to aerofoil profile speed measuring device, it is mostly based on
The differential speed measuring device of Pitot tube principle design can not be measured accurately because pressure difference is too small.Regardless of whether it is in high wind speed or again
Under low gustiness, above-mentioned conventional apparatus for measuring air quantity all has one, that is, industry contain grey environment under due to
The fluctuation of test environment pressure causes pressure obtaning device inside to produce breathing phenomenon, and dust can enter pressure pipeline with air-flow
In constantly deposit, ultimately result in impulse failure, can not often realize accurate measurement.Have in industrial circle and largely contain under grey environment
Air measuring problem, the mode for the installation shock club developed at present also fails to efficiently solve blockage problem.Therefore exploitation one
Kind has choke preventing function, and difference pressuring loss is small, very necessary suitable for the apparatus for measuring air quantity containing grey environment.
[utility model content]
The purpose of this utility model is solve the deficiencies in the prior art, there is provided a kind of continuous purging block-resistant type air measuring
Device, purged using compressed air on-line continuous so that the hollow gas of pressure measurement pipeline flows from inside to outside all the time, prevents dust completely
Entrance, and do not interfere with measurement, go for high wind speed and low wind speed.
To achieve these goals, a kind of continuous purging block-resistant type apparatus for measuring air quantity of design, including it is total head pressure pipe, quiet
Press pressure pipe, pressure bar, spinner flowmeter, pressure-reducing valve, pressure difference transmitter and pressure compensation structure, it is characterised in that total head pressure
The first pressure bar and the second pressure bar are respectively equipped with pipe and static pressure pressure pipe, between total head pressure inside pipe wall and the first pressure bar
Provided with the first gap, the second gap, total head pressure pipe and static pressure pressure are provided between static pressure pressure inside pipe wall and the second pressure bar
Pipe side is equipped with air inlet, and two air inlets connect with described the first air inlet and the second air inlet respectively, two air intakes
Mouth connects air chest by pipeline respectively, is provided with two spinner flowmeters and a pressure-reducing valve in air chest, the first pressure bar with
By connection pressure difference transmitter, the other end of the first pressure bar and the second pressure bar is respectively equipped with for one end of second pressure bar
Pressure compensation structure.
Total head pressure pipe is stretched out in first described pressure bar one end, and the first pressure bar stretches out leakage part and is provided with the first demarcation
Hole.Static pressure pressure pipe is stretched out in second described pressure bar one end, and the second pressure bar stretches out leakage part and is provided with the second demarcation hole.
In high wind speed state, described total head pressure pipe bottom end is provided with inclined-plane.It is described in low gustiness
Static pressure pressure pipe bottom end is provided with double-venturi, and total head pressure pipe bottom end is provided with inclined-plane.
The utility model compared with the existing technology, combining structure simple possible, is easily installed and dismantled, the advantage is that：
Pressure pipe is continuously purged using compressed air, thoroughly prevents dusty gas and enters pressure pipe, reaches reliable anti-blocking effect
Fruit；By installing autocompensation installation additional in pressure pipe, to eliminate influence of the change for purging pressure, flow to differential pressure measurement,
Reach the effect accurately measured.
[brief description of the drawings]
Fig. 1 is low wind speeds the utility model structure diagram；
The utility model structure diagram when Fig. 2 is high wind speed；
Fig. 3 is wind speed-pressure difference evolution curve of embodiment 1；
In figure：1. the first pressure bar 2. first demarcates the static pressure pressure pipe 6. of hole 3. pressure compensation structure, 4. total head pressure pipe 5.
The pressure bar 8. second of double-venturi 7. second demarcates hole.
[embodiment]
The utility model is described in further detail below in conjunction with the accompanying drawings, the structure and principle of this device people professional to this
For be very clear.It should be appreciated that specific embodiment described herein is only to explain the utility model, and do not have to
In restriction the utility model.
Referring to Fig. 1, described continuous purging block-resistant type apparatus for measuring air quantity, total head pressure pipe, static pressure pressure pipe, pressure
Set respectively in bar, spinner flowmeter, pressure-reducing valve, pressure difference transmitter and pressure compensation structure, total head pressure pipe and static pressure pressure pipe
There are the first pressure bar and the second pressure bar, total head pressure pipe and static pressure pressure pipe side are equipped with air inlet, two air inlets point
Air chest is not connected by pipeline, two spinner flowmeters and a pressure-reducing valve, the first pressure bar and second are provided with air chest
By connection pressure difference transmitter, the other end of the first pressure bar and the second pressure bar is respectively equipped with pressure for one end of pressure bar
Collocation structure.Total head pressure pipe is stretched out in first described pressure bar one end, and the first pressure bar stretches out exposed parts and is provided with the first mark
Determine hole.Static pressure pressure pipe is stretched out in second described pressure bar one end, and the second pressure bar stretches out exposed parts and is provided with the second demarcation hole.
Embodiment 1：Air measuring under high wind speed
Referring to Fig. 2, probe tube is continuously purged using compressed air, thoroughly prevents dusty gas and enters probe tube,
Reach reliable anti-blocking effect；Autocompensation installation is installed in pressure pipe additional, to eliminate the change of purging pressure, flow to pressure difference survey
The influence of amount.Described pressure bar is to transmit pressure signal, and described demarcation hole is to field calibration sampler pressure difference, institute
The pressure compensator stated is derived by Bernoulli equation to compensate the pressure change caused by compressed air purging and understands to work as
It is that the pressure that can compensate for bringing by purging becomes by adjusting purging and pressure area of section after compressed air is blown into sampler
Change.To obtain the total head of fluids within pipes, described static pressure pressure pipe flows described total head pressure pipe to obtain in pipeline
The static pressure of body.Described total head pressure pipe bottom end is provided with inclined-plane.
Velocity-area method can be used for large section duct, installs and average pressure difference is obtained after multiple measurement apparatus are pressed.
Solve the problems, such as that heavy in section pipeline flow field is uneven.It is the wind-tunnel measured under high wind speed using the utility model referring to table 1
Test data：
Test site：Shanghai University Of Electric Power, indoor temperature：21 DEG C, date of test：2016-10-09
Wind Tunnel Data table under the high wind speed of table 1.
Referring to Fig. 2, for the wind speed-pressure difference evolution curve of the present embodiment.
Embodiment 2：Air measuring under low wind speed
Under low gustiness, double-venturi device is installed additional at static pressure tapping, the device can be by local gas flow velocity
Improve more than twice, play a part of increased drawdown, with standard Pitot tube can be with quadruplication than pressure difference more than, completely can generation
For aerofoil profile speed measuring device usually used in the prior art, inclined-plane is provided with total head pressure pipe bottom end.It is low referring to table 2
The utility model installs the Wind Tunnel Data after double-venturi device additional under wind speed：
Test site：Shanghai University Of Electric Power, indoor temperature：14 DEG C, date of test：2016-11-02
Wind Tunnel Data table under 2. low wind speed of table
Embodiment 3
It is the contrast of the utility model and existing apparatus for measuring air quantity referring to table 3：
The apparatus for measuring air quantity of table 3. contrasts
The utility model solves that the existing differential measurement apparatus pressure loss is big and susceptible to plugging defect, and cost and
Maintenance cost is far below the measurement apparatus of heat-sensitive type and laser velocimeter, while can also realize multimetering, is a kind of reliable
Apparatus for measuring air quantity.
Claims (5)
1. a kind of continuous purging block-resistant type apparatus for measuring air quantity, including total head pressure pipe, static pressure pressure pipe, pressure bar, rotor stream
Gauge, pressure-reducing valve, pressure difference transmitter and pressure compensation structure, it is characterised in that set respectively in total head pressure pipe and static pressure pressure pipe
There are the first pressure bar and the second pressure bar, the first gap, static pressure pressure are provided between total head pressure inside pipe wall and the first pressure bar
The second gap is provided between inside pipe wall and the second pressure bar, total head pressure pipe and static pressure pressure pipe side are respectively entered provided with first
Air port and the second air inlet, two air inlets connect air chest by pipeline respectively, two spinner flowmeters are provided with air chest
With a pressure-reducing valve, one end of the first pressure bar and the second pressure bar by connection pressure difference transmitter, the first pressure bar and
The other end of second pressure bar is respectively equipped with pressure compensation structure.
A kind of 2. continuous purging block-resistant type apparatus for measuring air quantity as claimed in claim 1, it is characterised in that the first pressure bar one
Total head pressure pipe is stretched out at end, and the first pressure bar stretches out exposed parts and is provided with the first demarcation hole.
A kind of 3. continuous purging block-resistant type apparatus for measuring air quantity as claimed in claim 1, it is characterised in that the second pressure bar one
Static pressure pressure pipe is stretched out at end, and the second pressure bar stretches out exposed parts and is provided with the second demarcation hole.
4. a kind of continuous purging block-resistant type apparatus for measuring air quantity as claimed in claim 1, it is characterised in that described total head takes
Pressure pipe bottom end is provided with inclined-plane.
A kind of 5. continuous purging block-resistant type apparatus for measuring air quantity as claimed in claim 1, it is characterised in that static pressure pressure pipe bottom
Portion one end is provided with double-venturi, and total head pressure pipe bottom end is provided with inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720358800.XU CN206695848U (en) | 2017-04-06 | 2017-04-06 | Continuous purging block-resistant type apparatus for measuring air quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720358800.XU CN206695848U (en) | 2017-04-06 | 2017-04-06 | Continuous purging block-resistant type apparatus for measuring air quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206695848U true CN206695848U (en) | 2017-12-01 |
Family
ID=60440724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720358800.XU Active CN206695848U (en) | 2017-04-06 | 2017-04-06 | Continuous purging block-resistant type apparatus for measuring air quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206695848U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702942A (en) * | 2019-10-10 | 2020-01-17 | 南京益彩环境科技股份有限公司 | Positive-pressure continuous self-compensation blowing type anti-blocking wind speed and wind volume measuring method |
| CN111076861A (en) * | 2020-01-07 | 2020-04-28 | 江苏凯弘节能环保科技有限公司 | Anti-blocking five-group valve and control method thereof |
| CN111537137A (en) * | 2020-05-19 | 2020-08-14 | 天津中材工程研究中心有限公司 | Static pressure measurement method for dust-containing gas pipeline |
| CN112337905A (en) * | 2020-10-27 | 2021-02-09 | 江苏方天电力技术有限公司 | Device for improving denitration dilution air volume measurement accuracy |
-
2017
- 2017-04-06 CN CN201720358800.XU patent/CN206695848U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702942A (en) * | 2019-10-10 | 2020-01-17 | 南京益彩环境科技股份有限公司 | Positive-pressure continuous self-compensation blowing type anti-blocking wind speed and wind volume measuring method |
| CN110702942B (en) * | 2019-10-10 | 2021-09-07 | 南京益彩环境科技股份有限公司 | Positive-pressure continuous self-compensation blowing type anti-blocking wind speed and wind volume measuring method |
| CN111076861A (en) * | 2020-01-07 | 2020-04-28 | 江苏凯弘节能环保科技有限公司 | Anti-blocking five-group valve and control method thereof |
| CN111076861B (en) * | 2020-01-07 | 2021-10-08 | 江苏凯弘节能环保科技有限公司 | Anti-blocking five-group valve and control method thereof |
| CN111537137A (en) * | 2020-05-19 | 2020-08-14 | 天津中材工程研究中心有限公司 | Static pressure measurement method for dust-containing gas pipeline |
| CN111537137B (en) * | 2020-05-19 | 2021-09-14 | 天津中材工程研究中心有限公司 | Static pressure measurement method for dust-containing gas pipeline |
| CN112337905A (en) * | 2020-10-27 | 2021-02-09 | 江苏方天电力技术有限公司 | Device for improving denitration dilution air volume measurement accuracy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206695848U (en) | Continuous purging block-resistant type apparatus for measuring air quantity | |
| CN103335773B (en) | Pipeline gas pressure measuring device | |
| CN107270982B (en) | A kind of gas flow measurement experimental provision that measuring device is mobile | |
| CN107976222A (en) | A kind of Pitot tube integrated gas mass flow measurement methods | |
| CN113607227A (en) | Non-uniform flow field gas flow measurement method and system | |
| CN207081470U (en) | A kind of sonic nozzle calibrating installation | |
| CN201955111U (en) | Pitot tube flow meter | |
| CN1936506A (en) | Small section branch-flow measuring method for large-diameter gas flow and apparatus thereof | |
| CN204831400U (en) | Steady voltage formula low discharge wind speed amount of wind measuring device | |
| CN208534819U (en) | Device for the test of fan aeroperformance | |
| CN103940581B (en) | A kind of experimental technique of monitoring trace gas concentration value measurement jet entrainment amount | |
| CN104792372B (en) | wind measuring method for complex flow field roadway | |
| CN202836639U (en) | Heat-type v-cone differential pressure flow duplex measurement device | |
| CN104005974B (en) | A kind of Coal Mine Ventilator flow-measuring method based on pressure correlation method | |
| CN105319145B (en) | A kind of method for continuous measuring of high speed medium temperature negative pressure air humidity | |
| CN208333627U (en) | A kind of fluid flowmeter on-line checking self-calibrating device | |
| CN203535067U (en) | Measuring device for wind speed and wind volume | |
| CN207231557U (en) | A kind of bidirectional flow plug-in type AB symmetrical flowmeters | |
| CN202599975U (en) | Portable dust-containing airflow air speed monitoring device | |
| CN201335843Y (en) | Double-throat-diameter venturi air-velocity measuring pipe | |
| CN203981219U (en) | Wing serial sampling air flow sensor for variable air volume system | |
| CN205079804U (en) | Throttling arrangement and throttling flow meter | |
| CN206788201U (en) | A kind of Pitot tube component and the Flow speed measurer using the Pitot tube component | |
| CN209027599U (en) | A kind of redundant flow measuring device | |
| CN202836646U (en) | Thermal vortex composite flow measuring device with bypass bridge circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |