CN206074051U - A kind of flue gas flowrate calibrating device based on porous probe - Google Patents
A kind of flue gas flowrate calibrating device based on porous probe Download PDFInfo
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- CN206074051U CN206074051U CN201620770778.5U CN201620770778U CN206074051U CN 206074051 U CN206074051 U CN 206074051U CN 201620770778 U CN201620770778 U CN 201620770778U CN 206074051 U CN206074051 U CN 206074051U
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- swingle
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- flue gas
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Abstract
This utility model is related to extraction flow calibration field, more particularly to a kind of flue gas flowrate calibrating device based on porous probe, including the survey stock and swingle of the central thieff hatch of insertion flue radial direction, survey stock and be connected by rotary shaft with swingle, it is characterised in that：Survey stock hollow, there is scale on surface, one end is connected by drive rod equipped with worm-and-wheel gear, other end connecting power device, worm-and-wheel gear and power set；There is rotary shaft on worm-and-wheel gear, swingle passes through rotary shaft and worm-and-wheel gear connects；Some porous probes are provided with swingle, described porous probe connection pressure-measuring pipe, described pressure-measuring pipe are connected with TT＆C system.This utility model replaces pitot tube as measuring appliance using porous probe, and measurement angular range is big, and accuracy is high；It is rapidly completed the multiple spot flow-speed measurement of flue section.
Description
Technical field
This utility model is related to extraction flow calibration field, more particularly to a kind of flue gas flow based on porous probe
Calibrating installation.
Background technology
Currently, in the national economic development background that environmentally friendly dynamics is gradually increased to continuous growth of demand of energy total amount
Under, government department is more and more stricter for the control requirement of dusty gass and greenhouse gas emission total amount.Emission control to be guaranteed
The smooth realization of index, on the one hand will reduce the discharge of dusty gass and greenhouse gases, the opposing party from technology and control device
Face to be ensured measurement data accurately and reliably.GB13223-2011《Fossil-fuel power plant atmospheric pollutant emission standard》With《The Chinese people
Republic's Air Pollution Prevention Law》The management through quantification of coal steam-electric plant smoke emission limit and monitoring device is proposed clearly to
Ask.
At present, conventional flue gas flow calibration steps is according to GB/T 16157-1996《Granule in Concentration in Fixed Pollutants Source
Thing is determined and the gaseous contaminant method of sampling》, stretch in thieff hatch using the measurement bar with standard pitot tube or S type pitot tubes
Row pointwise is sampled, and measures the point flow velocity of sampled point, is then multiplied by flue cross section product by the meansigma methodss of each point flow velocity, so as to obtain cigarette
Gas instantaneous delivery.
Concrete measurement process：
1st, with hose connection measurement bar and flow integrator, open integrating instrument；
2nd, measurement bar is gradually stretched into flue from thieff hatch, stops stretching into when pitot tube pressure tappings reach sampled point,
Adjustment pressure tappings gather pressure signal towards direction of flow, fixed position；
3rd, traverse measurement bar continues measurement pressure to next sampled point, when all sampled point measurements in a thieff hatch
After finishing, change thieff hatch and continue measurement, until whole sampled point measurements are finished；
4th, flow integrator is measured according to each sampled point pressure signal and flue dimension information, calculate current stream automatically
Value.
Currently, most domestic thermal power plant is limited by place, and flue straight length is shorter, and curved with T-shaped pipeline, L-shaped
Various choked flow pieces such as pipe, damper, reducer pipe, aerofluxuss Flow Field Distribution are uneven, flow to very chaotic.If with pitot tube come
Measurement, same fixed position can only measure the flow velocity of single direction, if direction of flow and pitot tube axial direction angle are more than 5 °, skin
The measurement error of trustship then increases sharply, and causes flue gas flow measurement inaccurate.Furthermore, in measurement process, the side for adopting at present
Method is artificial point-to-point measurement.Because the steam power plant of current country's large-sized unit is more and more, flue size is most of highly more than 4 meters,
Up to more than 10 rice, number floor is high for part, and often beyond 60, whole measurement process needs more than 2 sample collectors more than 1 to measuring point number
The heavy labor of individual hour, wastes time and energy.
This mode usually requires that the straight length in Measure section upstream has the length of 6 times of flue diameters, but practical situation
It is difficult to meet, flow development length not enough causes aerofluxuss Flow Field Distribution uneven, and flow direction is chaotic.If still measuring in the manner described above,
The uncontrollable increase of measurement error is brought necessarily.On the other hand, the mode of point velocity is because of full manual operations, time of measuring compared with
Long, the uncertain increase that the stability of flue gas and the anthropic factor of operator bring, also result in measurement result can
Substantially reduce by property.
Utility model content
This utility model is directed to deficiencies of the prior art, there is provided a kind of flue gas stream based on porous probe
Amount calibrating installation, using porous probe as measurement sensor, can not only velocity measurement, moreover it is possible to while flow measurement is to the non-axle of effectively solving
To the flow-speed measurement problem of flowing, by way of multiple spot arrangement plus profile scanning, flow-speed measurement point is enable to cover total cross-section, and
The operating system of automatization can shorten time of measuring to several minutes, reduce the impact of foeign element, accurate so as to improve measurement result
True property.
In order to realize above-mentioned target, this utility model is adopted the following technical scheme that：A kind of flue based on porous probe
Extraction flow calibrating installation, including the survey stock and swingle of the central thieff hatch of insertion flue radial direction, survey stock and swingle are logical
Cross rotary shaft to be connected, it is characterised in that：Survey stock hollow, there is scale on surface, one end is equipped with worm-and-wheel gear, other end connection
Power set, worm-and-wheel gear and power set are connected by drive rod；There is rotary shaft on worm-and-wheel gear, swingle leads to
Cross rotary shaft and worm-and-wheel gear connection；Some porous probes, described porous probe connection pressure measurement are provided with swingle
Pipe, described pressure-measuring pipe are connected with TT＆C system；Survey stock and swingle inserts flue together, seen by the scale surveyed on stock
Examine, stop insertion when rotary shaft is located at flue lateral center, swingle is rotated centered on rotary shaft in flue, swingle
With stock overlapping is surveyed or can rotate to flue during rotation.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, described porous probe are hollow, end
Some inspecting holes are provided with, have metal tube and inspecting hole to weld together, in described metal tube insertion pressure-measuring pipe.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, the rotary step of swingle and single step stop
The time is stayed to be preset by TT＆C system and controller；Controller connects TT＆C system, TT＆C system connecting power device；Described survey
Control system is provided with the control module of the sensor of detection porous probe pressure and control power set.Except by control module control
System, power set also can be by manually operating.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, described power set are stepping electricity
Machine；Described TT＆C system is by controlling cable connection motor.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, also includes being located at flue horizontal stroke when rotary shaft
During to central authorities, for locking the mounting flange for surveying stock position, mounting flange is fixed on the other end for surveying stock.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, surveys stock and swingle insertion positioned at cigarette
The radially central thieff hatch in road, described thieff hatch carry pipeline and hole flange, and hole flange and mounting flange pass through fixture or solid
Determine part to realize interfixing.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, hole probe are provided with 5 holes or 7 holes, and 5 holes are visited
The measurable angle of elevation alpha of pin and drift angle β are less than ± 30 °, and the measurable angle of elevation alpha of 7 hole probes and drift angle β are less than ± 70 °.
A kind of aforesaid flue gas flowrate calibrating device based on porous probe, described porous detecting probe surface are cone
Shape, spherical, hemispherical, it is similar to spherical, hemispherical or is similar to the structure of taper.
Relative to prior art, the beneficial effects of the utility model are：Pitot tube is replaced as measurement using porous probe
Utensil, can measure air-flow and can reach ± 70 ° with respect to the angle of probe axis, and measurement angular range reaches 140 °, and accuracy is big
Exceed greatly pitot tube；
The section formed by motor, survey stock, worm-and-wheel gear, swingle rotates scanning technique automatically, is reducing people
Member's labor intensity, while improving work efficiency, measurement accuracy is also increased substantially.Meanwhile, according to the size of flue size,
The size for surveying stock and swingle need to be only lengthened or shortened, you can be rapidly completed the multiple spot flow-speed measurement of flue section.Can be with
As needed, by increasing the arrangement quantity of porous probe or reducing each rotation steps angle, realize section site density
Increasing, so as to further improve accuracy of measurement.
Description of the drawings
Fig. 1 is structure chart of the present utility model；
Structure charts of the Fig. 2 and Fig. 3 for porous probe；
Fig. 4 is operating state schematic diagram of the present utility model；
Wherein, 1 controller, 2 TT＆C systems, 3 control cables, 4 motors, 5 mounting flanges, 6 survey stocks, 7 drive rods,
8 worm-and-wheel gears, 9 pressure-measuring pipes, 10 porous probes, 11 swingles, 12 rotary shafts, 13 inspecting holes, 14 metal tubes, 15 fixtures, 16
Bolt, 17 hole flanges.
Specific embodiment
Make specific introduction to this utility model below in conjunction with the drawings and specific embodiments.
The structure of this utility model device is as shown in figure 1, by controller 1, TT＆C system 2, motor 4, mounting flange
5th, survey the porous spy that stock 6, drive rod 7, worm-and-wheel gear 8, swingle 11, rotary shaft 12, some porous probes 10 are constituted
Pin group and pressure-measuring pipe 9 etc. are constituted.During field calibration, a thieff hatch at flue radial direction middle part need to be only selected, survey stock 6 and rotation
Bull stick 11 is stretched into inside flue, is surveyed stock and is marked with scale, and mounting flange 5 can be moved forward and backward.Pre-determined bit is reached in rotary shaft 12
Postpone, locking mounting flange position, blending bolt 16 or fixture 15 and hole flange 17 connect, fixed calibration device.Open stepping
Motor 4 and TT＆C system 2, you can start calibration operation.
A kind of flue gas flowrate calibrating device based on porous probe, including insertion flue radially the survey stock in central authorities and
Swingle, is surveyed stock and is connected by rotary shaft with swingle；Survey stock hollow, there is scale on surface, one end is equipped with worm and gear machine
Structure, other end connecting power device, worm-and-wheel gear and power set are connected by drive rod；There is rotation on worm-and-wheel gear
Rotating shaft, swingle passes through rotary shaft and worm-and-wheel gear connects；Some porous probes, described porous are provided with swingle
Probe connects pressure-measuring pipe, and described pressure-measuring pipe is connected with TT＆C system；Survey stock and swingle inserts flue together, by surveying length
Scale observation on bar, stops insertion when rotary shaft is located at flue lateral center, and swingle is centered on rotary shaft in flue
Interior rotation, with stock overlapping is surveyed or can rotate to flue when swingle is rotated.The propulsion for surveying stock adopts what is manually advanced
Mode, the rotation of swingle are controlled to control worm-and-wheel gear by drive rod again after motor by TT＆C system, while band
Dynamic rotary shaft, finally realizes the rotation of swingle.
Described porous detecting probe surface is provided with some inspecting holes 13, has metal tube 14 and inspecting hole to weld together, described gold
In category pipe insertion pressure-measuring pipe.Porous probe is 5 holes or 7 holes, and the measurable angle of elevation alpha of 5 hole probes and drift angle β are less than ± 30 °, 7
The measurable angle of elevation alpha of hole probe and drift angle β are less than ± 70 °.Described porous detecting probe surface is taper, spherical, hemispherical, near
It is similar to spherical, hemispherical or is similar to taper.
The rotary step of swingle and the single step time of staying are preset by TT＆C system and controller；Controller connection observing and controlling system
System, TT＆C system connecting power device；Described TT＆C system is provided with the sensor of detection porous probe pressure and control is dynamic
The control module of power apparatus, and control the use process of power set.
Described power set are motor；Described TT＆C system connects motor by controlling cable 3；It is described
TT＆C system connection controller.Also include that rotary shaft 12 surveys the fixation of stock for locking when being located at flue lateral center
Orchid, mounting flange are fixed on the other end for surveying stock.Stock and swingle insertion are surveyed positioned at the radially central thieff hatch of flue, institute
The thieff hatch stated carries pipeline and hole flange, and hole flange and mounting flange are realized interfixing by fixture or fixture.
Specific work process is as follows：
1st, a thieff hatch for selecting flue radially middle, surveying in stock and swingle insertion measured hole, now rotates
Bar and survey stock overlapping are arranged, and judge to stretch into position according to the scale surveyed on stock, when the horizontal interposition of rotary shaft arrival flue
Be locked when putting flange, and mounting flange and hole flange are connected by blending bolt or fixture；Now, stock and swingle are surveyed no longer
Stretch into；
2nd, pressure-measuring pipe 9, control cable and TT＆C system connection, controller and TT＆C system are started；
The 3rd, rotary step and the single step time of staying of swingle is set by controller, and realizes rotating via TT＆C system
Control, swingle are rotated, and now survey stock is motionless, and TT＆C system starts the pressure signal of each porous probe of automatic data collection；
Rotary step and the single step time of staying may also be employed manual control rather than above-mentioned controller control.
4th, collect the pressure signal that each porous probe is measured, calculate the flow velocity of each measurement point, by way of Line Integral
Calculate current flue gas flow.
The above is only preferred implementation of the present utility model, it should be pointed out that：For the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, some improvement and the replacement of equivalents can also be made,
The technical scheme that these improve and equivalent is obtained should also belong to protection domain of the present utility model.
Claims (8)
1. a kind of survey of the central thieff hatch of flue gas flowrate calibrating device based on porous probe, including insertion flue radial direction is long
Bar and swingle, are surveyed stock and are connected by rotary shaft with swingle, it is characterised in that：Survey stock is hollow, and there are scale, one end in surface
Equipped with worm-and-wheel gear, other end connecting power device, worm-and-wheel gear and power set are connected by drive rod；Worm gear
There is rotary shaft on worm mechanism, swingle passes through rotary shaft and worm-and-wheel gear connects；Some porous are provided with swingle
Probe, described porous probe connection pressure-measuring pipe, described pressure-measuring pipe are connected with TT＆C system；Survey stock and swingle is inserted together
Enter flue, by the scale observation surveyed on stock, stop insertion when rotary shaft is located at flue lateral center, swingle is rotating
Rotate in flue centered on axle, with stock overlapping is surveyed or can rotate to flue when swingle is rotated.
2. a kind of flue gas flowrate calibrating device based on porous probe according to claim 1, it is characterised in that institute
The porous probe stated is hollow, and end is provided with some inspecting holes, has metal tube and inspecting hole to weld together, and described metal tube insertion is surveyed
In pressure pipe.
3. a kind of flue gas flowrate calibrating device based on porous probe according to claim 1, it is characterised in that survey
Control system connecting power device；Described TT＆C system is provided with the sensor of detection porous probe pressure.
4. a kind of flue gas flowrate calibrating device based on porous probe according to claim 1, it is characterised in that institute
The power set stated are motor；Described TT＆C system is by controlling cable connection motor.
5. a kind of flue gas flowrate calibrating device based on porous probe according to claim 1, it is characterised in that also
Including when rotary shaft is located at flue lateral center, for locking the mounting flange for surveying stock position, mounting flange is fixed on survey
The other end of stock.
6. a kind of flue gas flowrate calibrating device based on porous probe according to claim 5, it is characterised in that survey
, positioned at the radially central thieff hatch of flue, described thieff hatch carries pipeline and hole flange, hole flange for stock and swingle insertion
Pass through fixture with mounting flange or fixture is realized interfixing.
7. a kind of flue gas flowrate calibrating device based on porous probe according to claim 1, it is characterised in that many
Hole probe is provided with 5 holes or 7 holes, and the measurable angle of elevation alpha of 5 hole probes and drift angle β are less than ± 30 °, the measurable elevation angle of 7 hole probes
α and drift angle β is less than ± 70 °.
8. a kind of flue gas flowrate calibrating device based on porous probe according to claim 1, it is characterised in that institute
The porous detecting probe surface stated is taper, spherical or hemispheric structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620770778.5U CN206074051U (en) | 2016-07-21 | 2016-07-21 | A kind of flue gas flowrate calibrating device based on porous probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620770778.5U CN206074051U (en) | 2016-07-21 | 2016-07-21 | A kind of flue gas flowrate calibrating device based on porous probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206074051U true CN206074051U (en) | 2017-04-05 |
Family
ID=58425070
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620770778.5U Withdrawn - After Issue CN206074051U (en) | 2016-07-21 | 2016-07-21 | A kind of flue gas flowrate calibrating device based on porous probe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052773A (en) * | 2016-07-21 | 2016-10-26 | 南京天测检测有限公司 | Flue gas extraction flow calibration device and method based on porous probe |
| CN113866451A (en) * | 2021-12-06 | 2021-12-31 | 大同航源众诚动力科技有限公司 | Civil aircraft airspeed head self-separation protective sleeve |
| CN114062710A (en) * | 2021-11-18 | 2022-02-18 | 西安西热锅炉环保工程有限公司 | 3D flow velocity measuring probe and measuring method |
| KR20220060290A (en) * | 2020-11-04 | 2022-05-11 | 한국표준과학연구원 | 3Dimensional Smokestack Velocimetry calibration method and Smokestack on Site Velocity Measurement System by using Nulling method |
-
2016
- 2016-07-21 CN CN201620770778.5U patent/CN206074051U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052773A (en) * | 2016-07-21 | 2016-10-26 | 南京天测检测有限公司 | Flue gas extraction flow calibration device and method based on porous probe |
| CN106052773B (en) * | 2016-07-21 | 2022-07-19 | 南京天测检测有限公司 | Flue exhaust flow calibration device and method based on porous probe |
| KR20220060290A (en) * | 2020-11-04 | 2022-05-11 | 한국표준과학연구원 | 3Dimensional Smokestack Velocimetry calibration method and Smokestack on Site Velocity Measurement System by using Nulling method |
| WO2022097834A1 (en) * | 2020-11-04 | 2022-05-12 | 한국표준과학연구원 | Three-dimensional flow velocity measurement apparatus, and three-dimensional flow velocity measurement system and method using same in smokestack site |
| KR102446285B1 (en) | 2020-11-04 | 2022-09-22 | 한국표준과학연구원 | 3Dimensional Smokestack Velocimetry calibration method and Smokestack on Site Velocity Measurement System by using Nulling method |
| CN114062710A (en) * | 2021-11-18 | 2022-02-18 | 西安西热锅炉环保工程有限公司 | 3D flow velocity measuring probe and measuring method |
| CN113866451A (en) * | 2021-12-06 | 2021-12-31 | 大同航源众诚动力科技有限公司 | Civil aircraft airspeed head self-separation protective sleeve |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170405 Effective date of abandoning: 20220719 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170405 Effective date of abandoning: 20220719 |
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| AV01 | Patent right actively abandoned |