CN205679440U - A kind of sampling system being capable of constant flow isokinetic sampling - Google Patents
A kind of sampling system being capable of constant flow isokinetic sampling Download PDFInfo
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- CN205679440U CN205679440U CN201620053405.6U CN201620053405U CN205679440U CN 205679440 U CN205679440 U CN 205679440U CN 201620053405 U CN201620053405 U CN 201620053405U CN 205679440 U CN205679440 U CN 205679440U
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Abstract
This utility model relates to a kind of sampling system being capable of constant flow isokinetic sampling, including sampling detector for multifunctional, speed measuring device, microprocessing systems and warning device.Described sampling detector for multifunctional includes novel sampling mouth, detecting system, exsiccator, constant flow air pump, and its novel sampling mouth includes adjustment sheet, sealing member, retainer ring, connector.Described speed measuring device includes S type pitot tube and differential pressure transmitter.Novel sampling mouth described in the utility model is not required to additional control system and can automatically adjust sampling mouth caliber size with flue gas flow rate change, thus ensures that this sampling system all can utilize a novel sampling mouth to carry out isokinetic sampling in the range of bigger flue gas flow rate and when flue gas flow rate fluctuates.
Description
Technical field
This utility model belongs to environmental monitoring technology field, belongs to Sampling techniques.This sampling system is at bigger flue gas flow rate
In the range of and flue gas flow rate fluctuation time all can realize continuous isokinetic sampling.
Background technology
The relevant criterion measuring the method for sampling with gaseous contaminant for particulate matter in Concentration in Fixed Pollutants Source has GB/T
16157-1996, HJ/T 76-2007 etc..Above-mentioned standard all proposes particulate matter in Concentration in Fixed Pollutants Source and gaseous contaminant
Isokinetic sampling's principle is followed when sampling.
During constant flow isokinetic sampling, for making the sampling under different flue gas flow rate can meet isokinetic sampling's principle, need to prepare
The sampling mouth of multiple caliber.Sampling mouth caliber size and flue gas flow rate one_to_one corresponding.When the flue gas that flow velocity is different is sampled,
Need to frequently change sampling mouth.
Meanwhile, within the time period carrying out constant flow continuous sampling, flue gas flow rate is it may happen that localised waving.Due to cigarette
The fluctuation of gas velocity causes the sampling mouth of fixing bore to be unsatisfactory for the condition of isokinetic sampling.
Summary of the invention
The utility model of the application aims to overcome that the deficiency of existing Sampling techniques, a kind of smart structural design of proposition,
Reasonably novel sampling mouth.This sampling mouth can adjust sampling mouth caliber size automatically with flue gas flow rate change, thus ensures that this is adopted
Sample system all can realize utilizing a novel sampling mouth to carry out constant speed in the range of bigger flue gas flow rate and when flue gas flow rate fluctuates
Sampling.
This utility model is achieved by following technical solution.
A kind of sampling system being capable of constant flow isokinetic sampling, including sampling detector for multifunctional, speed measuring device, micro-process
System and warning device.Described sampling detector for multifunctional includes novel sampling mouth, detecting system, exsiccator, constant flow air pump, its
Novel sampling mouth includes adjustment sheet, sealing member, retainer ring, connector.Described novel sampling mouth, detecting system, exsiccator, constant current
Amount air pump is sequentially connected with by pipeline.Bled by constant flow air pump, drive flue gas to sequentially enter novel sampling mouth, detection
System, exsiccator, and discharge after gas drying after detection.Described novel sampling mouth entrance can be occurred convergence by multi-disc or expand
Scattered adjustment sheet is dispersed is fixed in retainer ring formation, and the gap in the middle of adjacent two pieces of adjustment sheets uses sealing member to carry out close
Envelope.Sealing member little by elastic modelling quantity and do not affect adjustment sheet convergence or diffusion material make.Retainer ring is for adjustment sheet
Fix and support.One end of connector is connected with retainer ring, and one end is connected with detecting system air inlet with by pipe fitting.Described survey
Speed variator includes S type pitot tube and differential pressure transmitter.S type pitot tube is fixed on the upper of flue wall, in flue center pair
Flue gas tests the speed.Front and back end, S type pitot tube gas outlet is respectively by pipeline and differential pressure transmitter air inlet high-low pressure end phase
Even.Differential pressure transmitter institute measuring pressure is delivered in microprocessing systems by data wire in signal of telecommunication mode.Described microprocessing systems
It is connected with differential pressure transmitter, detecting system, warning device respectively by data wire.Can be to flue gas of can sampling in microprocessing systems
Flow rates carries out alarming threshold value setting.Microprocessing systems can control detecting system and warning device by data wire.
This utility model has the advantage that；
(1) during to the traditional sampling of flue gas, for different flue gas flow rates, need frequently to change sampling mouth to realize
Isokinetic sampling；Novel sampling mouth described in the utility model can adjust sampling mouth caliber size automatically with flue gas flow rate change, thus
Ensure that bigger flue gas flow rate scope all can realize isokinetic sampling；
(2) sampling system described in the utility model can resist flue gas flow rate fluctuation, it is achieved isokinetic sampling, reduces sampling by mistake
Difference；
(3) sampling system described in the utility model is with warning device, can reflected measurement directly perceived in whole sampling process
The accuracy of process；
(4) comparing the Sampling techniques of present stage, novel sampling mouth described in the utility model is not required to additional control system and energy
Automatically sampling mouth caliber size is adjusted, it is achieved isokinetic sampling with flue gas flow rate change.
Accompanying drawing explanation
Fig. 1 is sampling system planar structure schematic diagram in this utility model embodiment；
Fig. 2 is adjustment sheet convergence schematic diagram in this utility model embodiment.
In figure, 1-novel sampling mouth, 2-S type pitot tube, 3-differential pressure transmitter, 4-microprocessing systems, 5-warning device, 6-
Flue, 7-detecting system, 8-exsiccator, 9-constant flow air pump, 11-adjustment sheet, 12-sealing member, 13-retainer ring, 14-connects
Part.
Detailed description of the invention
In order to more fully understand the technology contents of the present invention, below in conjunction with specific embodiment, technical scheme is entered
Row is further introduced and explanation, but claimed scope is not limited to described.
Embodiment
As shown in figure, a kind of sampling system being capable of constant flow isokinetic sampling described in the utility model, including adopting
Sample detection device, speed measuring device, microprocessing systems and warning device.Described sampling detector for multifunctional includes novel sampling mouth 1, detection
System 7, exsiccator 8, constant flow air pump 9, its novel sampling mouth 1 includes adjustment sheet 11, sealing member 12, retainer ring 13, connects
Part 14.Described novel sampling mouth 1, detecting system 7, exsiccator 8, constant flow air pump 9 are sequentially connected with by pipeline.Pass through constant current
Amount air pump 9 is bled, and drives flue gas to sequentially enter novel sampling mouth 1, detecting system 7, exsiccator 8, and is done by gas after detection
Discharge after dry.Described detecting system 7 selects the detector of light scattering principle, can detect the particulate matter in sampling gas.Dry
Gas after detection can be dried by dry device 8.Described novel sampling mouth 1 entrance can be occurred convergence or the tune of diffusion by multi-disc
Nodal plate 11 is dispersed is fixed in retainer ring 13 formation.As shown in Figure 2, adjustment sheet 11 cross section exists with flow of flue gas direction
Angle is θ0.The part dynamic pressure of flue gas can be converted into static pressure F to adjustment sheet 11.Adjustment sheet 11 is in the effect of static pressure F
Under, there is Bending Deformation as shown in dotted line in figure two, so that sampling mouthpiece footpath arrives flat when a certain value with suffered static pressure F
Weighing apparatus.Now, sampling mouthpiece footpath meets isokinetic sampling's principle with flue gas flow rate.When there is fluctuation in flue gas flow rate, adjustment sheet 11 institute
Sampling mouth adjustment sheet 11 can be caused to be resiliently deflected by the fluctuation of static pressure.Flexural modulus of elasticity is rapidly reached with static pressure F
Balance, now sampling mouth caliber size meets isokinetic sampling's principle with flue gas flow rate.Gap in the middle of adjacent two pieces of adjustment sheets 11
Sealing member 12 is used to seal.This sealing member 12 is little by elastic modelling quantity and does not affect the material system that adjustment sheet 11 is restrained or spread
Become.Retainer ring 13 is for the fixing of adjustment sheet 11 and supports.One end of connector 14 is connected with retainer ring 13, one end with by pipe
Part is connected with the air inlet of detecting system 7.Speed measuring device includes S type pitot tube 2 and differential pressure transmitter 3.S type pitot tube 2 is fixed
On flue wall 6, in flue center, flue gas is tested the speed.Front and back end, S type pitot tube 2 gas outlet passes through pipeline respectively
Communicate with differential pressure transmitter 3 air inlet high-low pressure end.3 measuring pressures of differential pressure transmitter are defeated by data wire in signal of telecommunication mode
Send in microprocessing systems 4.Described microprocessing systems 4 by data wire respectively with differential pressure transmitter 3, detecting system 7, warning device
5 connect.Microprocessing systems 4 can carry out alarming threshold value setting to flue gas flow rate scope of can sampling.Microprocessing systems 4 can be by number
According to line traffic control detecting system 7 and warning device 5.
Claims (2)
1. the sampling system being capable of constant flow isokinetic sampling, it is characterised in that: include sampling detector for multifunctional, test the speed dress
Put, microprocessing systems and warning device；
Described sampling detector for multifunctional includes novel sampling mouth, detecting system, exsiccator, constant flow air pump, its novel sampling mouth
Including adjustment sheet, sealing member, retainer ring, connector；Described speed measuring device includes S type pitot tube and differential pressure transmitter；Described newly
Type sampling mouth, detecting system, exsiccator, constant flow air pump are sequentially connected with by pipeline；Front and back end, S type pitot tube gas outlet is divided
Tong Guo not be connected with differential pressure transmitter air inlet high-low pressure end by pipeline；Differential pressure transmitter institute measuring pressure passes through in signal of telecommunication mode
Data wire is delivered in microprocessing systems.
A kind of sampling system being capable of constant flow isokinetic sampling the most according to claim 1, it is characterised in that: described
Novel sampling mouth entrance by multi-disc can occur convergence or diffusion dispersed being fixed in retainer ring of adjustment sheet formed, adjacent
Gap in the middle of two pieces of adjustment sheets uses sealing member to seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053405.6U CN205679440U (en) | 2016-01-20 | 2016-01-20 | A kind of sampling system being capable of constant flow isokinetic sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620053405.6U CN205679440U (en) | 2016-01-20 | 2016-01-20 | A kind of sampling system being capable of constant flow isokinetic sampling |
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| Publication Number | Publication Date |
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| CN205679440U true CN205679440U (en) | 2016-11-09 |
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| CN201620053405.6U Active CN205679440U (en) | 2016-01-20 | 2016-01-20 | A kind of sampling system being capable of constant flow isokinetic sampling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486549A (en) * | 2016-01-20 | 2016-04-13 | 四川大学 | Sampling system capable of realizing constant-flow isokinetic sampling |
| CN108152090A (en) * | 2018-02-07 | 2018-06-12 | 青海蓝博检测科技有限公司 | A kind of smoke dust sampling device |
-
2016
- 2016-01-20 CN CN201620053405.6U patent/CN205679440U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486549A (en) * | 2016-01-20 | 2016-04-13 | 四川大学 | Sampling system capable of realizing constant-flow isokinetic sampling |
| CN105486549B (en) * | 2016-01-20 | 2018-08-03 | 四川大学 | A kind of sampling system that can realize constant flow isokinetic sampling |
| CN108152090A (en) * | 2018-02-07 | 2018-06-12 | 青海蓝博检测科技有限公司 | A kind of smoke dust sampling device |
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