CN208043854U - A kind of even speed tube - Google Patents
A kind of even speed tube Download PDFInfo
- Publication number
- CN208043854U CN208043854U CN201820368707.1U CN201820368707U CN208043854U CN 208043854 U CN208043854 U CN 208043854U CN 201820368707 U CN201820368707 U CN 201820368707U CN 208043854 U CN208043854 U CN 208043854U
- Authority
- CN
- China
- Prior art keywords
- tube
- pressure
- guide holder
- tapping nozzle
- static
- 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.)
- Expired - Fee Related
Links
- 230000003068 static effect Effects 0.000 claims abstract description 21
- 238000010079 rubber tapping Methods 0.000 claims abstract description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003546 flue gas Substances 0.000 abstract description 3
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 abstract description 2
- 206010022000 influenza Diseases 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a kind of even speed tube, which has ram-air pipes；Static tube；Ring flange；Pressure transmitter；Loose joint connecting tube；Negative pressure-tapping nozzle；Positive pressure-tapping nozzle;Connecting line；Differential pressure transmitter；Shut-off valve；Guide holder；The utility model even speed tube is to measure the flow velocity and pressure in flue gas, common S types Pitot tube and standard type Pitot tube belongs to a measurement, even speed tube belongs to line measurement, it measures flow velocity and pressure precision is high, stability is good, for CEMS, when the coefficient of calculating speed field, it needs to measure the velocity field coefficient of multiple points, needs to measure so multiple;Average velocity field coefficient can be calculated using even speed tube, labor intensity is alleviated, has saved the working time.
Description
Technical field
The utility model is related to a kind of even speed tubes, belong to environment monitoring instrument field.
Background technology
Stationary source flue gas（SO2, NOx, particulate matter）Continuous monitor system newest standards require, and are needed in flow rate calculation
Mean flow rate, S types Pitot tube and standard pitot tube originally cannot meet the requirement of new standard, and it is flat that urgent need wants one kind that can measure
The device of equal flow velocity.
Invention content
In order to solve the above technical problems, the utility model provides a kind of average rate pipe device, cigarette to be measured can be kept
The flow velocity that gas is stablized.
A kind of even speed tube, it is characterised in that:
It is welded on the static tube on total head tube wall including ram-air pipe and air inlet；
Described ram-air pipe one end is welded on guide holder, and the other side of guide holder is equipped with positive pressure-tapping nozzle and ventilates with ram-air pipe,
68 apertures of φ are evenly equipped on ram-air pipe；
The air inlet of the static tube is set in the middle part of ram-air pipe, and at the back side of aperture, and gas outlet is welded with guide holder, led
The negative pressure-tapping nozzle ventilated with static tube is equipped with to the other side of seat；
The guide holder is equipped with ring flange；
Positive pressure-tapping nozzle connects pressure transmitter by loose joint connecting tube, directly exports static pressure and switchs to 4-20mA signals to integrating
Instrument, positive pressure-tapping nozzle side are equipped with shut-off valve, can carry out blowback, positive and negative pressure-tapping nozzle is separately connected the positive and negative terminal of differential pressure transmitter, defeated
Go out 4-20mA signals to integrating instrument, flow velocity is calculated by integrating instrument.
The static tube is the stainless steel tube of 8X1.
Total head blank pipe front is uniformly distributed the aperture of 6- φ 8, before block；
Pressure transmitter and differential pressure transmitter output signal are 4-20mA；
Pressure transmitter measures the static pressure of flue as needed；
Calculation formula is V=K (2 △ P/ ρ)1/2
△P=PS–P2
V flues or chimney flow velocity m/s
Ps flues or chimney are averaged total head
P2Flue or chimney static pressure.
The utility model is that solve common S types Pitot tube and mark to measure the flow velocity and pressure in flue gas
Pseudotype Pitot tube is only capable of carrying out a measurement, and even speed tube provided by the utility model belongs to line measurement, the flow velocity and pressure measured
Precision is high, and stability is good, for CEMS, when the coefficient of calculating speed field, needs the velocity field coefficient for measuring multiple points, in this way needs
It measures multiple;Average velocity field coefficient can be calculated using even speed tube, labor intensity is alleviated, has saved the working time.
Description of the drawings
The utility model is described in detail with reference to embodiment and attached drawing.
Fig. 1 is the structural schematic diagram of the utility model.
In Fig. 1:1. ram-air pipe；2. static tube；3. ring flange；4. pressure transmitter；5. loose joint connecting tube；6. negative pressure
Mouth；7. positive pressure-tapping nozzle；8. connecting line；9. differential pressure transmitter；10. shut-off valve；11. guide holder.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
As the structural schematic diagram that Fig. 1 is the utility model, including ram-air pipe 1 and air inlet are welded on total head tube wall
Static tube 2；
1 one end of the ram-air pipe is welded on guide holder 11, and the other side of guide holder 11 is equipped with positive pressure-tapping nozzle 7 and ram-air pipe
1 ventilates, and 68 apertures of φ are evenly equipped on ram-air pipe 1；
The air inlet of the static tube 2 is set to 1 middle part of ram-air pipe, and at the back side of aperture, and gas outlet is welded with guide holder 11
It connects, the other side of guide holder 11 is equipped with the negative pressure-tapping nozzle 6 ventilated with static tube 2；
The guide holder 11 is equipped with ring flange 3；
Positive pressure-tapping nozzle 7 connects pressure transmitter 4 by loose joint connecting tube 5, directly exports static pressure and switchs to 4-20mA signals to product
Instrument is calculated, positive pressure-tapping nozzle side is equipped with shut-off valve 10, can carry out blowback, positive and negative pressure-tapping nozzle is separately connected the positive and negative of differential pressure transmitter
End, output 4-20mA signals calculate flow velocity to integrating instrument by integrating instrument.
The static tube is the stainless steel tube of 8X1.
Total head blank pipe front is uniformly distributed the aperture of 6- φ 8, before block；
Pressure transmitter and differential pressure transmitter output signal are 4-20mA；
Pressure transmitter measures the static pressure of flue as needed；
Calculation formula is V=K (2 △ P/ ρ)1/2
△P=PS–P2
V flues or chimney flow velocity m/s
Ps flues or chimney are averaged total head
P2Flue or chimney static pressure.
Claims (1)
1. a kind of even speed tube, it is characterised in that:
It is welded on the static tube on total head tube wall including ram-air pipe and air inlet；
Described ram-air pipe one end is welded on guide holder, and the other side of guide holder is equipped with positive pressure-tapping nozzle and ventilates with ram-air pipe, total head
68 apertures of φ are evenly equipped on pipe；
The air inlet of the static tube is set in the middle part of ram-air pipe, and at the back side of aperture, and gas outlet is welded with guide holder, guide holder
The other side be equipped with the negative pressure-tapping nozzle ventilated with static tube；
The guide holder is equipped with ring flange；
Positive pressure-tapping nozzle connects pressure transmitter by loose joint connecting tube, directly exports static pressure and switchs to 4-20mA signals to integrating instrument, just
Pressure-tapping nozzle side is equipped with shut-off valve, can carry out blowback, and positive and negative pressure-tapping nozzle is separately connected the positive and negative terminal of differential pressure transmitter, exports 4-
20mA signals calculate flow velocity to integrating instrument, by integrating instrument；
The static tube is the stainless steel tube of 8X1；
Total head blank pipe front is uniformly distributed the aperture of φ 6-8, before block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368707.1U CN208043854U (en) | 2018-03-19 | 2018-03-19 | A kind of even speed tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820368707.1U CN208043854U (en) | 2018-03-19 | 2018-03-19 | A kind of even speed tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208043854U true CN208043854U (en) | 2018-11-02 |
Family
ID=63947263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820368707.1U Expired - Fee Related CN208043854U (en) | 2018-03-19 | 2018-03-19 | A kind of even speed tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208043854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959417A (en) * | 2019-05-06 | 2019-07-02 | 江苏宏达仪表科技有限公司 | A kind of chimney flowmeter and its manufacturing process |
-
2018
- 2018-03-19 CN CN201820368707.1U patent/CN208043854U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959417A (en) * | 2019-05-06 | 2019-07-02 | 江苏宏达仪表科技有限公司 | A kind of chimney flowmeter and its manufacturing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181102 |