CN109855921A - A kind of intellegent sampling device and the method for sampling measuring fuel burning different zones intermediate product - Google Patents
A kind of intellegent sampling device and the method for sampling measuring fuel burning different zones intermediate product Download PDFInfo
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Abstract
The invention belongs to IC Engine Test Technology fields, are related to a kind of intellegent sampling device and method for measuring fuel burning different zones intermediate product；Including sampling gas-guide tube, thermocouple, sliding support, electromagnetic flowmeter, cooling tube, PLC controller, micro-suction pump, solenoid valve B, branch pipe, glass fiber filter, solenoid valve A, silicon pressure drag micro-pressure sensor and sampler bag；Concrete operations are as follows: selection measurement position, placing device；PLC controller, micro-suction pump work are opened, solenoid valve B is opened, cleaning sampling gas-guide tube；Solenoid valve B is closed, and solenoid valve A is opened, and sampler bag and glass fiber filter start to acquire product；Thermocouple, silicon pressure drag micro-pressure sensor and electromagnetic flowmeter feed back live signal to PLC controller, the intellegent sampling of fuel oil difference flame height burning gases and solid intermediate product is realized with sampled pressure using PLC controller control sampling time, sampling flow, it ensure that the precision of sampling, realize intellegent sampling.
Description
Technical field
The invention patent belongs to IC Engine Test Technology field, and in particular among a kind of measurement fuel burning different zones
The intellegent sampling device and the method for sampling of product.
Background technique
The liquid fuels such as diesel oil are the major impetus sources of China's motor vehicle, are widely used in automobile, agricultural machinery, work
The industries such as journey machinery, ship and railway locomotive are mechanical.Studies have shown that the heavy motor truck based on combustion diesel fuel is PM discharge
One of main source.In general, the process that fuel burning forms particulate matter to solid phase again by liquid phase to gas phase is extremely complex, packet
Include the stages such as fuel oil splitting decomposition, cyclization, gas-solid conversion, particle growth.For the forming process for studying particle, domestic and foreign scholars couple
The approach that the intermediate product and particle of fuel oil difference combustion state are formed carries out in-depth study, wherein being used as combustion intermediate product
Gas phase and solid matter be the key that particle formation, and the purpose of this sampling apparatus is exactly to adopt using intellegent sampling device
Collect the intermediate product of fuel burning different zones, for the further relationship disclosed between combustion product and particle (PM), proposes
The method for reducing diesel engine PM provides condition.
Current existing sampling apparatus principle is mostly to be existed using the opening and closing of mechanically or electrically subsystem control sampling valve
The combustion product after the completion of burning, mostly particulate solid are collected at exhaust valve, even if there is the sampling of some combustion intermediate products
Device, and the advantages that not have structure simple, and control is stablized, sampling intelligence facilitates, the present invention sample simultaneously gaseous products with
Solid product, so different phase of the present invention according to fuel burning, proposes the control methods such as sampling time, flow, pressure,
By application control electric elements and software is write, realizes intelligent sample, the device and method are for studying fuel burning
The gas and solid intermediate product of different zones have great importance.
Summary of the invention
In view of the deficiencies of the prior art, present invention seek to address that one of described problem；The flame formed due to fuel burning
With significantly raising up, flame core, internal flame, flame envelope can be divided into, for rationally acquisition combustion intermediate product, precise measurement displacement can
Multiple positions are chosen as measurement point, multiple measurement points correspond to the position of more sampling gas-guide tubes and thermocouple；The present invention provides
A kind of intellegent sampling device measuring fuel burning different zones intermediate products, can voluntarily adjust measurement point according to the actual situation
Number and position.
In order to achieve the goal above, technical scheme is as follows:
It is including multiple present invention firstly provides a kind of intellegent sampling device for measuring fuel burning different zones intermediate product
It samples gas-guide tube, thermocouple, sliding support, electromagnetic flowmeter, cooling tube, PLC controller, micro-suction pump, solenoid valve B, divide
Manifold, glass fiber filter, solenoid valve A, silicon pressure drag micro-pressure sensor and sampler bag；
Multiple sampling gas-guide tubes are to be arranged in parallel up and down, and thermocouple is installed in one end of the sampling gas-guide tube, are placed in
Temperature is detected among combustion flame, the other end connects sampler bag；The resistance micro-pressure sensor is set to sampler bag and sampling air guide
The junction of pipe；
The sliding support is vertically connected with sampling gas-guide tube；The thermocouple is sequentially connected electromagnetism by sampling gas-guide tube
Flowmeter, cooling tube, micro-suction pump, branch pipe and glass fiber filter；
One branch pipe is set at the branch pipe, is connected to outside air；Solenoid valve B is provided on the branch pipe；
The solenoid valve A is set between glass fiber filter and sampler bag；
The PLC controller is successively connected with electromagnetic flowmeter and solenoid valve A；
The thermocouple, solenoid valve B and micro-suction pump are connect by electromagnetic flowmeter and solenoid valve A with PLC controller.
The sliding support is no less than 1.
The straight long tube that the diameter of the sampling gas-guide tube is 1.5~2.5mm, high temperature resistant, for conveying sample gas.
The flow velocity of gas in the electromagnetic flowmeter detection sampling gas-guide tube, and according to formula P0=(V2*L)/(C2* R) meter
Pressure P at where calculating0；Wherein V is gas flow rate in pipe, and R is pipe radius, and L is air guide length of tube, and C is coefficient, wherein
Coefficient C=R(1/6)/ n, n are wall surface roughnesses, and value range is 0.011~0.014.
The sampler bag is the material bag of rubber system, and bag internal volume is 0.8~1.2L, and sack is the circle of 6~8mm of diameter
Bottleneck facilitates connection sample gas detecting instrument.
The micro-suction pump flow rates are 0.2~1L/min.
The silicon pressure drag micro-pressure sensor includes power sensing structure, for detecting pressure size in sampler bag；The quick knot of power
Structure is double nose girder membrane structures, and when there is pressure to act on pressure-sensitive diaphragm, pressure-sensitive diaphragm deforms, due to piezoresistive effect,
Resistance value changes, and passes through formulaPressure value p is calculated, p is what diaphragm was subject in formula
Pressure, h are diaphragm thickness, and c is diaphragm side length, and v is linearity parameters.
The PLC controller is made of ARM programmable chip and the control unit write.
The present invention also provides a kind of method of sampling of fuel oil difference flame height combustion intermediate product intellegent sampling device, packets
Include following steps:
Step 1: first according to burning different zones, selecting measurement position, place sampling apparatus；Then PLC control is pressed
Device switch；Micro-suction pump work, solenoid valve B are opened；Sampling gas-guide tube starts to collect gas, and thermocouple and electromagnetic flowmeter are anti-
Live signal is presented to PLC controller；
Step 2: the flow velocity of gas in electromagnetic flowmeter detection sampling gas-guide tube passes through formula P0=(V2*L)/(C2* R) meter
Calculation obtains pressure value P at sampling gas-guide tube0；Wherein V is gas flow rate in pipe, and R is pipe radius, and L is air guide length of tube, and C is
Coefficient, wherein coefficient C=R(1/6)/ n, n are wall surface roughness, value range 0.011-0.014；
Step 3: pressure p in sampler bag being detected by silicon pressure drag micro-pressure sensor, calculation formula is
P is the pressure that diaphragm is subject in formula, and h is diaphragm thickness, and c is diaphragm side length, and v is linearity parameters；
Step 4: the P according to obtained in step 2 and step 30And P, it is controlled by PLC controller: working as P0When < 2P, increase
Big micro-suction pump flow velocity, until P0When=2P, micro-suction pump is run with current constant flow rate, is simultaneously closed off solenoid valve B, is opened
Open solenoid valve A；To P > 1.5P0When, solenoid valve A is closed, while solenoid valve B is opened, cleaning sampling gas-guide tube is run five minutes
Afterwards, solenoid valve B is closed, micro-suction pump stops working, and completes sampling.
Beneficial effects of the present invention:
The intellegent sampling device of a kind of measurement fuel burning different zones intermediate product of the invention, for acquiring with diesel oil
Based on fuel oil difference combustion phases intermediate product, which can choose different test points according to the characteristic of combustion flame,
It can accurately indicate different combustion phases；It is formed to solid phase again in view of fuel burning is one by liquid phase to gas phase simultaneously
The complex process of grain object, evaluates fuel oil attribute by sampling, studying combustion intermediate product, divides fuel oil product
Analysis.It samples while including solid-state and gaseous state combustion intermediate product in sampling process, using PLC controller, is fired according to fuel oil
The different phase of burning proposes the control methods such as sampling time, flow, pressure, to the gas and solid of fuel burning different zones
Intermediate product carries out intelligence, precisely sampling.The present invention has many advantages, such as that sampling apparatus structure is simple, sampling is comprehensive, operation intelligence.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of intellegent sampling device for measuring fuel burning different zones intermediate product.
Fig. 2 is the specific control flow chart of intelligence control system PLC controller.
Wherein 1- samples gas-guide tube；2- thermocouple；3- sliding support；4- electromagnetic flowmeter；5- cooling tube；6-PLC control
Device；7- micro-suction pump；8- solenoid valve B；9- branch pipe；10- glass fiber filter；11- solenoid valve A；12- silicon pressure drag minute-pressure passes
Sensor；13- sampler bag；14- combustion flame.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described, and examples of the embodiments are shown in the accompanying drawings, wherein certainly
Begin to indicate same or similar element or element with the same or similar functions to same or similar label eventually.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
The orientation or positional relationship of the instructions such as " thickness ", "upper", "lower", " axial direction ", " radial direction ", "vertical", "horizontal", "inner", "outside"
To be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as
Limitation of the present invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be with
Explicitly or implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or
Two or more, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
A kind of intelligence of measurement fuel burning different zones intermediate product of the invention is illustrated below with reference to schematic diagram
Sampling apparatus and the method for sampling.It significantly raises up since the flame that fuel burning is formed has, flame core, internal flame, flame envelope can be divided into,
Rationally to acquire combustion intermediate product, precise measurement displacement can choose multiple positions as measurement point, and multiple measurement points are corresponding
The position of more sampling gas-guide tubes and thermocouple；A kind of intelligence measuring fuel burning different zones intermediate product provided by the invention
Energy sampling apparatus, can voluntarily adjust number and the position of measurement point according to the actual situation.
The present invention chooses five measurement points, as shown in Figure 1, a kind of fuel oil difference flame height combustion intermediate product is intelligently adopted
Sampling device, comprising: sampling gas-guide tube 1, thermocouple 2, sliding support 3, electromagnetic flowmeter 4, cooling tube 5, PLC controller 6, miniature
Aspiration pump 7, solenoid valve B8, branch pipe 9, glass fiber filter 10, solenoid valve A11, silicon pressure drag micro-pressure sensor 12 and sampler bag
13。
The sliding support 3 selects 2, is vertically connecting apart from the 1/3 of thermocouple 2 and 2/3 in sampling gas-guide tube 1 respectively
It connects, for adjusting the height and distance of sampling gas-guide tube 1, chooses suitable height and distance as needed and sampled.
Five samplings gas-guide tube 1 is the straight long tube that diameter is 1.5~2.5mm, high temperature resistant, for conveying sampling gas
Body.
The thermocouple 2 by sample gas-guide tube (1) be sequentially connected electromagnetic flowmeter 4, cooling tube 5, micro-suction pump 7,
Branch pipe 9 and glass fiber filter 10；
One branch pipe is set at the branch pipe 9, is connected to outside air；Solenoid valve B8 is provided on the branch pipe；
The PLC controller 6 is successively connected with electromagnetic flowmeter 4 and solenoid valve A11；The thermocouple 2, solenoid valve B8 and
Micro-suction pump 7 is connect by electromagnetic flowmeter 4 and solenoid valve A11 with PLC controller 6.
Five thermocouples 2 are mounted on the front-end surface of sampling gas-guide tube 1, for measuring flame temperature；Thermocouple 2 selects
With thin diameter thermocouple, and it is cased with elongated porcelain tube, it is possible to reduce thermal coefficient improves heat release of the flame to thermal cross
Coefficient, reduces conductive heat loss, and thermocouple 2 connects PLC controller 6, shows the flame temperature T measured on it.
The flow velocity of gas in five electromagnetic flowmeters 4 detection sampling gas-guide tube 1, and according to formula P0=(V2*L)/
(C2* R) (M1) can calculate where at pressure P0, wherein V is gas flow rate in gas-guide tube, and R is pipe radius, and C is to be
Number, C=R(1/6)/ n, L are air guide length of tube, and n is wall surface roughness, and value range is 0.011~0.014.
Five cooling tubes 5 are cooling device, for reducing the gas temperature in sampling gas-guide tube 1, prevent gas temperature
Spend high destruction sampler bag 13.
Five glass fiber filters 10 are used to filter, adsorb, acquire solid-state combustion intermediate product in sample gas,
Glass fiber filter 10 is extracted after experiment and obtains combustion intermediate product particulate solid, is used for experimental study.
7 flow rates of micro-suction pump are 0.2~1L/min.
The sampler bag 13 is the material bag of rubber system, and bag internal volume is 1L, and sack is 6~8mm of diameter circle bottleneck, side
Just sample gas detecting instrument is connected.
The silicon pressure drag micro-pressure sensor 12 includes power sensing structure, for detecting pressure size in sampler bag 13；The quick knot of power
Structure is double nose girder membrane structures, and when there is pressure to act on pressure-sensitive diaphragm, pressure-sensitive diaphragm deforms, due to piezoresistive effect,
Resistance value changes, and passes through formula(M2) it calculates it can be concluded that pressure value.
As shown in Fig. 2, the PLC controller 6 receive and show 2 temperature parameter T of thermocouple, 4 flow velocity V of electromagnetic flowmeter,
Airway pressure P is calculated by above-mentioned formula in the pressure parameter P of silicon pressure drag micro-pressure sensor 120, PLC controller editor
Program and control unit: work as P0When < 2P, increase micro-suction pump flow velocity, until P0When=2P, micro-suction pump is with current constant
Solenoid valve B is closed in flow velocity operation, and opens solenoid valve A, micro-suction pump is run with current constant flow rate, until P > 1.5P0When,
Solenoid valve A11 where this silicon pressure drag micro-pressure sensor 12 is closed, while solenoid valve B8 is opened, after operation five minutes, place
Solenoid valve B8 close, micro-suction pump 7 stops working, this sampler bag 13 and the sampling of glass fiber filter 10 are completed, other are several
Group sampling apparatus works on, until five groups of wholly off work of micro-suction pump 7, sampling is completed.If test needs, can also be real
Existing five groups are tested respectively.
The course of work and installation method of the present apparatus, first install sampling apparatus, and check device is reliably fixed, concrete operations
The following steps are included:
Step 1: first according to burning different zones, selecting measurement position, place sampling apparatus；
Step 2: pressing the switch of PLC controller 6；
Step 3: micro-suction pump 7 works, and solenoid valve B8 is opened；
Step 4: thermocouple 2 and electromagnetic flowmeter 4 feed back live signal, calculate P by formula (M1) and (M2)0And P,
Work as P0When < 2P, increase 7 flow velocity of micro-suction pump；Until P0When=2P, micro-suction pump 7 is run with current constant flow rate, and same
When close solenoid valve B8, opens solenoid valve A11；To P > 1.5P0When, close solenoid valve A11, opens solenoid valve B8, cleaning sampling
Gas-guide tube 1；
Step 5: after operation five minutes, the solenoid valve B8 at place is closed, and micro-suction pump 7 stops working, 13 He of sampler bag
The sampling of glass fiber filter 10 is completed.
Above to a kind of intellegent sampling device of measurement fuel burning different zones intermediate product provided by the present invention
And the method for sampling is described in detail, and applies specific case herein and is explained the principle of the present invention and embodiment
It states, is noted that the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention.It is all this
Any modification and improvement etc. are made within the spirit and principle of invention, should be included within the scope of the present invention.
Claims (8)
1. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device, which is characterized in that led including multiple samplings
Tracheae (1), thermocouple (2), sliding support (3), electromagnetic flowmeter (4), cooling tube (5), PLC controller (6), micro-suction pump
(7), solenoid valve B(8), branch pipe (9), glass fiber filter (10), solenoid valve A(11), silicon pressure drag micro-pressure sensor (12) and
Sampler bag (13)；
Multiple sampling gas-guide tubes (1) are to be arranged in parallel up and down, and thermocouple (2) are installed in one end of sampling gas-guide tube (1),
It is placed among combustion flame (14)；The other end connects sampler bag (13)；The resistance micro-pressure sensor (12) is set to sampler bag
(13) with sampling gas-guide tube (1) junction；
The sliding support (3) is vertically connected with sampling gas-guide tube (1)；The thermocouple (2) is by sampling gas-guide tube (1) successively
Connect electromagnetic flowmeter (4), cooling tube (5), micro-suction pump (7), branch pipe (9) and glass fiber filter (10)；
One branch pipe is set at the branch pipe (9), is connected to outside air；Solenoid valve B(8 is provided on the branch pipe)；It is described
Solenoid valve A(11) it is set between glass fiber filter (10) and sampler bag (13)；
The PLC controller (6) is successively connected with electromagnetic flowmeter (4) and solenoid valve A(11)；The thermocouple (2), solenoid valve
B(8) and micro-suction pump (7) passes through electromagnetic flowmeter (4) and solenoid valve A(11) it is connect with PLC controller (6).
2. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device according to claim 1, feature
It is, the sliding support (3) is no less than 1；The straight long tube that the diameter of sampling gas-guide tube (1) is 1.5 ~ 2.5mm, is used for
Convey sample gas.
3. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device according to claim 1, which is characterized in that
The electromagnetic flowmeter (4) is used to detect the flow velocity V of sampling gas-guide tube (1) interior gas, and according to formula
Calculate pressure P0；Wherein V is gas flow rate in pipe, and R is pipe radius, and L is air guide length of tube, and C is coefficient, wherein coefficient, n is wall surface roughness, and value range is 0.011 ~ 0.014.
4. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device according to claim 1, feature
It is, the sampler bag (13) is rubber material, and volume is 0.8 ~ 1.2L, and the sack of sampler bag (13) is the circle of 6 ~ 8mm of diameter
Shape bottleneck.
5. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device according to claim 1, feature
It is, micro-suction pump (7) flow rates are 0.2 ~ 1L/min.
6. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device according to claim 1, feature
It is, the silicon pressure drag micro-pressure sensor (12) includes power sensing structure, for detecting sampler bag (13) interior pressure size；Pass through
Formula, pressure value p is calculated, in formulaFor the pressure that diaphragm is subject to, h is diaphragm thickness, c
For diaphragm side length,For linearity parameters.
7. a kind of fuel oil difference flame height combustion intermediate product intellegent sampling device according to claim 1, feature
It is, the PLC controller (6) is made of ARM programmable chip and control unit.
8. a kind of method of sampling of fuel oil difference flame height combustion intermediate product intellegent sampling device, which is characterized in that including
Following steps:
Step 1: first according to burning different zones, selecting measurement position, place sampling apparatus；It is then turned on PLC controller
(6), micro-suction pump (7) is started to work, solenoid valve B(8) it opens；Thermocouple (2) and electromagnetic flowmeter (4) feed back live signal
To PLC controller (6)；
Step 2: the flow velocity of electromagnetic flowmeter (4) detection sampling gas-guide tube (1) interior gas passes through formula
Pressure value P at sampling gas-guide tube (1) is calculated0；Wherein V is gas flow rate in pipe, and R is pipe radius, and L is air guide pipe range
Degree, C is coefficient, wherein coefficient, n is wall surface roughness, and value range is 0.011 ~ 0.014；
Step 3: and then sampler bag (13) interior pressure p, calculation formula are detected by silicon pressure drag micro-pressure sensor (12), in formulaFor the pressure that diaphragm is subject to, h is diaphragm thickness, and c is diaphragm side length,For the linearity
Parameter；
Step 4: the P according to obtained in step 2 and step 30And P, it is controlled by PLC controller (6): working as P0When < 2P, increase
Big micro-suction pump (7) flow velocity, until P0When=2P, micro-suction pump (7) simultaneously closes off electromagnetism with the operation of current constant flow rate
Valve B(8), opens solenoid valve A(11)；To P > 1.5P0When, close solenoid valve A(11), while solenoid valve B(8) open, it is adopted
The cleaning of sample gas-guide tube (1) closes solenoid valve B(8 after operation five minutes), micro-suction pump (7) stops working, that is, completes to adopt
Sample.
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| CN113503909A (en) * | 2021-05-19 | 2021-10-15 | 湖南华电云通电力技术有限公司 | Extra-high voltage converter transformer on-line monitoring device and method thereof |
| CN113503909B (en) * | 2021-05-19 | 2023-03-14 | 湖南华电云通电力技术有限公司 | Extra-high voltage converter transformer on-line monitoring device |
| CN115307965A (en) * | 2022-09-29 | 2022-11-08 | 山西豪盛环保科技有限公司 | Soil stratified sampling is with preventing cross contamination drilling equipment |
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