CN206788610U - A kind of measurement apparatus - Google Patents
A kind of measurement apparatus Download PDFInfo
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- CN206788610U CN206788610U CN201720582216.2U CN201720582216U CN206788610U CN 206788610 U CN206788610 U CN 206788610U CN 201720582216 U CN201720582216 U CN 201720582216U CN 206788610 U CN206788610 U CN 206788610U
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- short tube
- electric charge
- tube base
- charge induction
- sensor
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Abstract
It the utility model is related to a kind of measurement apparatus, it is inaccurate to which solve apparatus for measuring dust concentration measurement in existing pipeline, poor reliability, the problem of maintenance is big, it includes electric charge induction sensor one, electric charge induction sensor two, A/D converting units, data acquisition unit, DSP Processor, short tube base one and short tube base two, electric charge induction sensor one and electric charge induction sensor two are connected with A/D converting units respectively, data acquisition unit is connected with A/D converting units, and DSP Processor is connected with data acquisition unit；Electric charge induction sensor one passes through short tube base one, and short tube base two passes through short tube base two；Centre-to-centre spacing between short tube base one and short tube base two is 200mm.The utility model is widely used in the detection of flue gas flow, dust concentration.
Description
Technical field
The detection of the flue gas flow, dust concentration of out of stock system is the utility model is related to, more particularly, to one kind measurement dress
Put.
Background technology
At present, it is necessary to detected to desulfuration efficiency during the generating set operation of power plant, due to out of stock flue bore is big,
Straight length is short, temperature is high and corrosivity is unfavorable for preferably detecting desulfuration efficiency by force.Can be used during detection differential pressure flowmeter and
Thermal mass flow meter, it is conventional when being measured using differential pressure flowmeter, pressure guiding pipe easily blocks, null offset is big, it is linear it is poor,
Easily by vibration influence the shortcomings that, maintenance is big.When being measured using thermal mass flow meter, because thermometric original paper must be with stream
Body physical contact between media, is easily corroded；The shortcomings that most fatal is that requirement temperature of fluid medium is constant, and medium temperature change is direct
Influence measurement accuracy.
The content of the invention
The utility model poor reliability, is safeguarded to solve apparatus for measuring dust concentration measurement inaccuracy in existing pipeline
Measure big technical problem, there is provided one kind measurement is accurate, highly reliable, the small measurement apparatus of maintenance.
Measurement apparatus provided by the utility model, including electric charge induction sensor one, electric charge induction sensor two, A/D turn
Change unit, data acquisition unit, DSP Processor, short tube base one and short tube base two, electric charge induction sensor one and electric charge sense
Inductive sensing device two is connected with A/D converting units respectively, and data acquisition unit is connected with A/D converting units, DSP Processor and data
Collecting unit connects；Electric charge induction sensor one passes through short tube base one, and short tube base two passes through short tube base two；Short tube base
Centre-to-centre spacing between one and short tube base two is 200mm.
Preferably, in addition to temperature sensor and pressure sensor, temperature sensor are connected with A/D converting units, pressure
Sensor is connected with A/D converting units.
The beneficial effects of the utility model are,
(1) out of stock system entry and the flue gas flow and dust concentration of outlet are accurately measured online；
(2) plug-in type passive sensor is popped one's head in, and Maintenance free realizes truly non-maintaining with cleaning；
(3) do not influenceed by the gentle stream type of dust liquid form；
(4) 100% linearity, 1% multiplicity；
(5) dust stratification on the dust content or sensor in air channel does not influence the measurement accuracy of system；
(6) sensor has high durability, and high temperature high voltage resistant；
(7) installation of sensor is very simple with changing, and need not be from new demarcation；
(8) only need very short straight length can be to reach very high measurement accuracy；
(9) thoroughly solve due to heavy caliber, the measurement difficulty that short flue, flow velocity are low, deep-etching is brought.
The utility model further feature, by the description of detailed description below, it is clearly stated that.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the schematic diagram that two electric charge induction sensors are arranged on pipeline；
Fig. 3 is that the data that two inductive pick-ups detect pass through the schematic diagram that DSP Processor calculates.
Symbol description in figure：
1a. electric charge inductions sensor one, 1b. electric charge inductions sensor two, 2.A/D converting units, 3. data acquisition units,
4.DSP processors, 5.DCS systems, 6. pipelines, 7. short tube bases one, 8. short tube bases two；9. temperature sensor, 10. pressure pass
Sensor.
Embodiment
As illustrated in fig. 1 and 2, the 1a of the electric charge induction sensor one and 1b of electric charge induction sensor two respectively with A/D converting units 2
Connection, data acquisition unit 3 is connected with A/D converting units 2, and DSP Processor 4 is connected with data acquisition unit 3, DCS system 5 and
DSP Processor 4 connects.
Temperature sensor 9 is connected with A/D converting units 2, and pressure sensor 10 is connected with A/D converting units 2.TEMP
Device 9, the probe of pressure sensor 10 are inserted in pipe under test.
The perforate on the pipeline 6 of boiler, short tube base 1 and short tube base 28 are welded on pipeline 6, by electric charge sense
The 1a of inductive sensing device one is inserted into pipeline 6 from short tube base 1, and the 1b of electric charge induction sensor two is inserted from short tube base 28
Into pipeline 6.The 1a of electric charge induction sensor one is located at upstream, and the 1b of electric charge induction sensor two is located at downstream.
Centre-to-centre spacing between short tube base 1 and short tube base 28 is 200mm, that is to say, that mounted two electric charges
Centre-to-centre spacing between the probe of inductive pick-up is 200mm.
As shown in figure 3, the 1a of the electric charge induction sensor one and 1b of electric charge induction sensor two is as in pipeline 6, dust granules
After mutually collision, friction, by with certain quantity of electric charge, while certain charge field is produced, when these dust granules
During by near the special 1a of electric charge induction sensor one and the 1b of electric charge induction sensor two probe, in two sensor probes
Surface will produce the charge inducing of equivalent, then produce induced-current, i.e., on the sensor probe of upstream and downstream produce two with
This analog signal is converted into data signal and passes through data acquisition with digital transmiting means by machine analog signal, A/D converting units 2
Unit 3 is sent to DSP Processor 4 and show that two random signals are time difference Δ t, due between the sensor probe of upstream and downstream
Distance L is constant, so as to accurately calculate the flow velocity V=L/ Δ t of dust granules, after the sectional area of input channel
The volume flow of dust can be measured.Can calculates the powder under the status of criterion after device cut-in temperature and pressure transmitter
The volume flow of dirt.Using AC charge induction technology measure flow velocity V when, due to this system be only concerned powder dust particle by it is upper,
The time difference Δ t of charge signal caused by downstream sensor, thus the measurement accuracy not change by powder dust particle composition and periphery
Environment is (such as：Temperature, pressure, humidity) etc. change influence, therefore high-precision, stable flow measurement can be realized.
Dust granules or flue gas concentration detection are to utilize two electric charge induction sensor sensing AC charge disturbance quantities and powder
Dirt concentration of emission, can be with exactly after using the real-time flow rate V measured and it is modified into the relation of positive correlation
The relative concentration values of flue dust in dust or flue gas are measured, the absolute value of dust or dust concentration is just can obtain after field calibration.
It is described above to be not limited to the utility model only to preferred embodiment of the present utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.
Claims (2)
1. a kind of measurement apparatus, it is characterised in that single including electric charge induction sensor one, electric charge induction sensor two, A/D conversions
Member, data acquisition unit, DSP Processor, short tube base one and short tube base two, the electric charge induction sensor one and electric charge sense
Inductive sensing device two is connected with A/D converting units respectively, and data acquisition unit is connected with A/D converting units, DSP Processor and data
Collecting unit connects；Electric charge induction sensor one passes through short tube base one, and short tube base two passes through short tube base two；The short tube
Centre-to-centre spacing between base one and short tube base two is 200mm.
2. measurement apparatus according to claim 1, it is characterised in that also including temperature sensor and pressure sensor, institute
State temperature sensor to be connected with A/D converting units, pressure sensor is connected with A/D converting units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720582216.2U CN206788610U (en) | 2017-05-23 | 2017-05-23 | A kind of measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720582216.2U CN206788610U (en) | 2017-05-23 | 2017-05-23 | A kind of measurement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206788610U true CN206788610U (en) | 2017-12-22 |
Family
ID=60712819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720582216.2U Active CN206788610U (en) | 2017-05-23 | 2017-05-23 | A kind of measurement apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN206788610U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918371A (en) * | 2018-07-18 | 2018-11-30 | 中煤科工集团重庆研究院有限公司 | High-precision wide-range dust concentration detection device and dust concentration detection method |
| CN109625648A (en) * | 2018-12-12 | 2019-04-16 | 西安美克森科技工程有限公司 | Ash bucket for electrostatic and bag-type dust removal system is anti-blocking to exempt from tracing system |
-
2017
- 2017-05-23 CN CN201720582216.2U patent/CN206788610U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918371A (en) * | 2018-07-18 | 2018-11-30 | 中煤科工集团重庆研究院有限公司 | High-precision wide-range dust concentration detection device and dust concentration detection method |
| CN108918371B (en) * | 2018-07-18 | 2021-01-26 | 中煤科工集团重庆研究院有限公司 | High-precision wide-range dust concentration detection device and dust concentration detection method |
| CN109625648A (en) * | 2018-12-12 | 2019-04-16 | 西安美克森科技工程有限公司 | Ash bucket for electrostatic and bag-type dust removal system is anti-blocking to exempt from tracing system |
| CN109625648B (en) * | 2018-12-12 | 2020-06-16 | 西安美克森科技工程有限公司 | Ash bucket anti-blocking and heat tracing-free system for electrostatic and cloth bag dust removal system |
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