CN208953340U - Two partial size sections or more partial size sections automatically switch sampling apparatus for atmospheric particulate matter - Google Patents
Two partial size sections or more partial size sections automatically switch sampling apparatus for atmospheric particulate matter Download PDFInfo
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- CN208953340U CN208953340U CN201821300916.9U CN201821300916U CN208953340U CN 208953340 U CN208953340 U CN 208953340U CN 201821300916 U CN201821300916 U CN 201821300916U CN 208953340 U CN208953340 U CN 208953340U
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Abstract
The utility model, which discloses, a kind of can be continuous drying and automatically switches sampling apparatus for atmospheric particulate matter, including atmospheric sampling system, industry control module and computer control module in two partial size sections or more partial size sections；Atmospheric sampling system is connected to the front end of Atmospheric particulates component online monitoring instruments, including efficient cyclone separator, Nafion airflow drying tube, solenoid valve, vacuum pump, critical flow orifice and gas piping；Gas piping includes total sampling gas circuit, primary drainage gas circuit, secondary drainage gas circuit, instrument sampling gas circuit and airflow drying tube sheath gas gas circuit；Jointly control the opening and closing of the solenoid valve in atmospheric sampling system by industry control module and computer control module, adjust the flow of primary drainage gas circuit and secondary drainage gas circuit, change the incising control of efficient cyclone separator, it realizes the Atmospheric particulates sampling that more partial size sections automatically switch, can be realized gradation diameter section and carry out long term monitoring Atmospheric particulates chemical constituent.
Description
Technical field
The utility model relates to atmosphere environment supervision technologies, and in particular to it is a kind of can it is continuous drying and multiple partial size sections from
Sampling apparatus for atmospheric particulate matter/system of dynamic switching.
Background technique
Mass concentration, chemical constituent and partial size are three critical natures of Atmospheric particulates, in order to Atmospheric particulates reality
The chemical constituent quantitative detection of gradation diameter section is applied, common technology mainly based on off-line analysis, is such as classified by microporous particles object
It hits sampler (MOUDI) and acquires the Atmospheric particulates of different-grain diameter section on filter membrane, then obtained in lab analysis filter membrane sample
Score partial size section chemical constituent and mass concentration information.Such methods temporal resolution is lower, and sample is in acquisition, preservation, fortune
Defeated wait easily loses or changes in the process, brings larger uncertainty to measurement result.Online airborne particulate materialization in recent years
It learns component monitoring technology to be widely applied, as aerosol mass spectrometer (Q-AMS, HR-ToF-AMS), aerosol chemistry form
Monitor (ACSM, ToF-ACSM), organic carbon/element carbon analyzer (OC/EC), online water soluble ion analyzer (WAGA,
IGAC, MARGA) etc..In this quasi-instrument only aerosol mass spectrometer can in real time gradation diameter monitoring Atmospheric particulates chemical composition and
Mass concentration, but it is expensive, complicated for operation, data processing is difficult.Several instruments are comparatively more economical simple afterwards, and performance is steady
It is fixed, the long-term on-line measurement suitable for monitoring station.The sampling system of these equipment generally only configures single particle size section particulate matter
Cutting head still can not achieve the detection of gradation diameter section particulate matter chemical constituent such as sub-micron or 2.5 microns.Traditional sampling system
System also uses muff, causes vapor to condense to avoid outside atmosphere and the temperature difference in monitoring station, but effect is unobvious, relatively
It still be easy to cause condensation vapor in pipe when humidity is high, leads to measurement error.
Utility model content
In view of the above-mentioned problems, the utility model provide it is a kind of can it is continuous drying and multiple partial size sections automatically switch it is big
Aerated particle object sampling apparatus is able to solve common Atmospheric particulates chemical constituent on-line monitoring technique and is unable to gradation diameter section and grown
The problem of phase monitors.
To achieve the above object, the utility model takes following technical scheme,
A kind of sampling apparatus for atmospheric particulate matter that more partial size sections automatically switch, including atmospheric sampling system, industry control module and
Computer control module；Jointly control opening for the solenoid valve in atmospheric sampling system by industry control module and computer control module
It closes, is achieved in more partial size sections and automatically switches；Wherein:
Atmospheric sampling system is connected to the front end of Atmospheric particulates component online monitoring instruments；Atmospheric sampling system includes height
Effect cyclone separator, Nafion airflow drying tube, HEPA filter, solenoid valve, vacuum pump, critical flow orifice, flowmeter, two are led to
Ball valve and gas piping；The gas piping of atmospheric sampling system includes total sampling gas circuit, primary drainage gas circuit, secondary drainage gas
Road, instrument sampling gas circuit and airflow drying tube sheath gas gas circuit；Wherein, airflow drying tube sheath gas gas circuit and primary drainage gas circuit are same
One gas circuit；Total sampling gas circuit connects efficient cyclone separator gas outlet by 1 three-way connection, instrument samples gas circuit and secondary is drawn
Gas road；One section of U-bend curved tube is included at least between the efficient cyclone separator and Nafion airflow drying tube；The secondary
Drain air circuit connection HEPA filter, flowmeter, multiple solenoid valves and critical flow orifice combination, and by 1 two pass ball valve with
Vacuum pump is connected；The instrument sampling air circuit connection Nafion airflow drying tube and online monitoring instruments；The instrument samples gas
Road is divided into instrument sample introduction gas circuit itself and primary drainage gas circuit by 1 three-way connection, connects 1 HEPA filter-flow
Meter-solenoid valve-critical flow orifice combination, and access and the Nafion airflow drying tube sheath gas entrance, and the Nafion gas
The outlet of stream drying tube sheath gas is then connected with vacuum pump, connects 1 two pass ball valve in vacuum pump inlet, constitutes airflow drying tube sheath gas
Gas circuit；The particulate matter incising control of the efficient cyclone separator is controlled by total sampling flow, is that Atmospheric particulates component is online
The sum of monitoring instrument sampling flow itself, primary drainage gas circuit flow and secondary drainage gas circuit flow；The gas piping material
It is determined depending on gas circuit function, is related to the gas circuit (total sampler road and instrument sampling gas circuit) of instrument sampling using the stainless of inner wall polishing
Teflon pipe or copper pipe can be used in steel pipe, remaining gas circuit, and sampling pipe leads to each component by two and three-way connection is connected；
By the signal of the computer control module control channel industry control card DO output, to pass through the relay mould of industry control module
The opening and closing of group control power supply component (solenoid valve)；Computer control module be used to control signal that each channel DO of industry control card provides into
Row " high RST/low signal " switching；Specifically:
Industry control module includes Switching Power Supply, industry control card, relay mould group, circuit and supply port (terminal)；Industry control card
Signal path can be communicated by the digital channel I/O (Digital In/Out, DI/O) with computer control module foundation；Different
The channel DO corresponds to each solenoid valve in atmospheric sampling system.The industry control module connects each supply port and signal by electric wire
Port, and be connected by USB or RS232 data line with computer, and then provide touching by computer control module control industry control card
It signals, the on-off of circuit locating for supply port is controlled by relay mould group, and then control atmospheric sampling system solenoid valve
It is opened and closed, adjusts the flow that the primary and secondary in above-mentioned atmospheric sampling system drains gas circuit, to change efficient cyclone separator
Incising control；
Computer control module, including automatically control, manually control two kinds of trigger circuit on-off modes.Automatic control mode
There is self-clocking function, initial " opening/closing " state of each solenoid valve may be selected, and set the time interval of opening and closing variation, follows
Ring trigger circuit changes the opening and closing of the control each solenoid valve of atmospheric sampling system by connecting and disconnecting of the circuit.MANUAL CONTROL mode is then single
Secondary trigger circuit on-off, directly controls the opening and closing of every way solenoid valve.Computer control module further includes automatically saving text data
File function can record open and-shut mode, variation and the corresponding variation time of origin of every way solenoid valve.
Above-mentioned diameter section automatically switches the Atmospheric particulates group connecting in sampling apparatus for atmospheric particulate matter with atmospheric sampling system
Aerosol mass spectrometer (including Q-AMS, HR-ToF-AMS), aerosol chemistry composition monitor can be used in point online monitoring instruments
(including ACSM, ToF-ACSM), organic carbon/element carbon analyzer (OC/EC), online water soluble ion analyzer (including WAGA,
IGAC, MARGA) etc. instruments.
Wherein, aerosol mass spectrometer and aerosol chemistry composition detector itself can cut particle size,
But it is only capable of cutting a kind of partial size (sub-micron or 2.5 microns).In one specific embodiment of the utility model (special case), it is preferable that
A kind of two partial size sections automatic switchover sampling apparatus for atmospheric particulate matter is provided, Atmospheric particulates component online monitoring instruments are used and cut
It cuts the aerosol chemistry that partial size is 2.5 microns and forms monitor ToF-ACSM；By using settable duration circulation delay after
Electric appliance, " opening/closing " state for solenoid valve in loop control secondary drainage gas circuit (an only branch)；Primary drainage gas circuit is logical
It crosses and reduces particulate matter in the residence time of sampling system, to reduce measurement error.This method can be realized two partial size sections certainly
Dynamic switching Atmospheric particulates sampling, but the time of solenoid valve state switching can not be recorded.
It is sampled using the sampling apparatus for atmospheric particulate matter that above-mentioned more partial size sections automatically switch, including is walked as follows automatically
It is rapid:
1) it is directed to the partial size section of Atmospheric particulates, chooses efficient cyclone separator, according to incising control-flow curve, really
Determine the corresponding flow of partial size section；The particulate matter incising control of efficient cyclone separator is controlled by total sampling flow, is airborne particulate
The sum of object component online monitoring instruments sampling flow, primary drainage gas circuit flow and secondary drainage gas circuit flow；By more partial size sections
The sampling apparatus for atmospheric particulate matter of automatic switchover is placed in Atmospheric particulates online monitoring instruments front end；
2) sampling air flow realizes particle size cutting by efficient cyclone separator；
3) sampling air flow by cutting passes through U-shaped bend pipe and threeway, is connected with sampling gas circuit and secondary drainage gas circuit；
4) solenoid valve in primary drainage gas circuit and secondary drainage gas circuit is connected with the supply port of industry control module, and is
Its corresponding channel industry control card DO is arranged in each solenoid valve；
5) industry control module is connected by USB or RS232 data line with computer, thus certainly by computer control module
Move/manually control " opening/closing " state of solenoid valve；
Specifically, computer control module be used to control industry control card correspond to signal progress that the channel DO provides " high RST/
Low signal " switching, can be used automatic switchover mode or manual switching mode；Relay mould group in industry control module receives industry control card
The signal that the channel DO provides, to control the opening and closing of solenoid valve；It is adjusted by the opening and closing of solenoid valve first in atmospheric sampling system
The flow of grade drainage gas circuit and secondary drainage gas circuit, to change the incising control of efficient cyclone separator；
Through the above steps, it realizes and the automatic sampling that more partial size sections automatically switch is carried out to Atmospheric particulates.
Compared with prior art, the utility model has the beneficial effects that
Because the utility model adopts the above technical scheme, it has the following advantages:
1, device provided by the utility model passes through efficient cyclone by controlling multiple solenoid valve opening and closings and effectively quickly adjusting
The air flow rate of separator provides more partial size sections for online atmosphere particle monitoring equipment and cuts automatically to change particle separation diameter
The sampling system changed divides fraction monitoring data to obtain, simple and easy, versatile, can be widely used for Atmospheric particulates
Online monitoring instruments；
2, the utility model can effectively avoid and be adopted using the dry sampling air flow of Nafion airflow drying tube sheath gas vacuum technique
Sample air-flow greatly reduces the error of summer measurement, Maintenance free can long-term continuous operation because of condensation vapor caused by the temperature difference；
3, the utility model is saved by Nafion airflow drying tube sheath gas gas circuit together with instrument primary drainage air circuit connection
About pipe line parts, reduce the load of vacuum pump；
4, the utility model controls air flow rate, low cost, strong operability, flow control standard using critical flow orifice
Really, pipeline-cleaning is convenient；
5, the utility model can be protected vacuum pump, be kept away using the Atmospheric particulates in HEPA filter sampling by filtration air-flow
Exempt from critical flow hole plug；
6, the utility model is remote controlled, and has automatic recording function, is suitable for long term monitoring.
Detailed description of the invention
Fig. 1 is atmospheric sampling system structure diagram provided by the embodiment of the utility model；
Wherein, A: efficient cyclone separator；B:Nafion airflow drying tube；C:HEPA filter；D: flowmeter；E: electromagnetism
Valve；F: critical flow orifice；G: vacuum pump；H: two pass ball valves；I: three-way connection；J: four-way connection；K: teflon pipe；L: inner wall is thrown
The stainless steel tube of light.
Fig. 2 is industry control module circuit schematic provided by the embodiment of the utility model.
Fig. 3 is control module front panel schematic diagram provided by the embodiment of the utility model.
Fig. 4 is control module workflow block diagram provided by the embodiment of the utility model.
Specific embodiment
With reference to the accompanying drawing, the utility model is further described by embodiment, but limitation is not originally practical in any way
Novel range.
As shown in Figure 1, the utility model provides a set of Atmospheric particulates sampling system, mainly by efficient cyclone separator A,
Nafion airflow drying tube B, HEPA filter C, flowmeter D, solenoid valve E, critical flow orifice F, vacuum pump G, two pass ball valve H and
Gas piping composition.Gas piping includes teflon pipe K (black thin in Fig. 1), inner wall polishing stainless steel pipe L (overstriking in Fig. 1
Black line), three-way connection I and four-way connection J, the system be placed in Atmospheric particulates online monitoring instruments front end, provided for instrument
Grain object sampling.
Particle size cutting uses efficient cyclone separator, and sampling air flow passes through cyclone separator A, and sampling flow is got over
Greatly, incising control is smaller, and the corresponding relationship of flow and incising control depends on producer's model of selected cyclone separator, such as originally
The URG company 2000-30EHB type cyclone separator that utility model embodiment uses, flow 4.5,7.2,16.7Lmin-1Shi Cai
Sample respectively corresponds 0-3,0-2,0-1 μm of partial size sections, and the particulate matter greater than incising control is then deposited on bottom cover.Due to cyclone separator
Thief hatch mostly perpendicular to ground so as to rain-proof dust-proof, the sampling air flow by cutting need to pass through one section of U-shaped bend pipe and one
Threeway I samples gas circuit with instrument and secondary drainage gas circuit is connected.
Instrument samples gas circuit and uses inner wall polishing stainless steel pipe L, and control caliber guarantees laminar flow, can reduce Atmospheric particulates and exist
Loss in sampling pipe.In addition to the gas circuit for being related to instrument sampling, other gas circuits (primary drainage gas circuit, secondary drainage gas circuit)
Teflon pipe K can be used, improve flexibility when actually building pipeline.Instrument sampling gas circuit first connects Nafion airflow drying tube
B, then be connected by a three-way connection I with instrument sample introduction gas circuit itself and primary drainage gas circuit.The utility model embodiment is adopted
With Perma Pure company MD700 type Nafion drying tube, sampling air flow passes through from inner tube, and inner tubal wall is Nafion film, epitheca
For vacuum, water-vapor exchange and then dry sampling gas occurs with inner tube interior air-flow.Sampling air flow after drying enters monitoring station
The indoor connection online monitoring instruments of point, moisture condensation will not be caused because of the temperature difference and is impacted to measurement.
The sheath gas entrance of Nafion airflow drying tube B and primary are drained air circuit connection, sheath gas outlet end by the utility model
Vacuum pump is connected, causes intrathecal vacuum environment, and use a two pass ball valve H between the outlet of sheath gas and vacuum pump, it can be manual
Control the opening and closing of this gas circuit.Primary drainage gas circuit includes a HEPA filter C, a flowmeter D, a solenoid valve E and one
A critical flow orifice F, gas circuit can omit flowmeter after flow calibration in implementation.Primary drainage gas circuit one end connecting utricle gas enters
Mouthful, the other end samples gas circuit with instrument by a three-way connection I and is connected.HEPA filter C in primary drainage gas circuit can be gone
Except Atmospheric particulates, for protecting solenoid valve E, critical flow orifice F, Nafion airflow drying tube B and vacuum pump G not by particle
Object is polluted and is blocked.
Secondary drainage gas circuit first passes through a HEPA filter C removal Atmospheric particulates, using a flowmeter D, so
It is followed by three-way connection I or four-way connection J and gas circuit is divided into several branches, every branch first connects a solenoid valve E and one critical
Metering orifice F, all branches pass through three-way connection I again or four-way connection J converges, using a two pass ball valve H, finally and vacuum
It pumps G to be connected, gas circuit can omit flowmeter after flow calibration in implementation.HEPA filter C is for removing secondary drainage gas circuit
In Atmospheric particulates, protect solenoid valve E, critical flow orifice F and vacuum pump G not to be blocked by Particulate Pollution.
The opening and closing of all solenoid valve E is by control mould provided by the utility model in primary drainage gas circuit and secondary drainage gas circuit
Block and industry control module are controlled by trigger circuit on-off.If the utility model embodiment uses direct current 24V solenoid valve, when energization
State is " closing " when state is "ON", power-off, and computer control module controls the industry control card relay in industry control module and provides touching
It signals, controls the on-off of solenoid valve power supply circuit, and then change solenoid valve open and-shut mode.Critical flow orifice F is for controlling institute
In the air flow rate of gas circuit, outflow terminates vacuum pump, at one end flow speed stability under vacuum, one section of atmospheric pressure.
For the atmosphere particulate monitoring instrument small to sampling flow itself, primary drainage can reduce to be sampled in particulate matter
The residence time of system, to reduce measurement error, the solenoid valve E of this gas circuit should be set as normally opened, and instrument samples gas circuit total flow
For the sum of instrument sampling flow itself and primary drainage flow；Without secondary drainage (the solenoid valve E in i.e. secondary drainage gas circuit
It is fully closed, no flow) in the case where, instrument sampling gas circuit total flow determines sampling system maximum incising control.Itself is sampled
For the big instrument of flow, instrument sampling flow itself can be used as minimum sampling total flow (primary drainage gas circuit and secondary drainage
Solenoid valve E or two pass ball valve H in gas circuit are turned off, no flow) decision sampling system maximum incising control, and primary and secondary
Drainage then can additionally increase sampling total flow, reduce incising control, pass through control module provided by the utility model and industry control mould
Block controls the flow of primary and secondary drainage gas circuit, to realize that fly-cutting partial size switches.Stream needed for primary and secondary drainage
Amount is depending on incising control-flow curve of cyclone separator A and the sample requirement of user, it then follows every bypass flow is incremented by
The principle of (and incising control successively decreases) designs.
The utility model provides the embodiment that a two partial size sections automatically switch, and carries out below for this embodiment detailed
Description.Wherein the online monitoring instruments of sampling system connection are ToF-ACSM, can be used for Atmospheric particulates chemical constituent and supervise online
It surveys.Smaller (the 0.1L min of the instrument sampling flow of ToF-ACSM-1), therefore primary drainage flow need to be set to reduce particulate matter
Residence time in sampling system.The primary drainage flow of the present embodiment setting is 4.4L min-1, secondary drainage includes a branch
Road, flow are 12.2L min-1.The present embodiment chooses URG company 2000-30EHB type efficient cyclone separator.In actual samples,
Solenoid valve E and two pass ball valve H is maintained a normally open in primary drainage gas circuit；Two pass ball valve H are maintained a normally open in secondary drainage gas circuit, electromagnetism
Valve E realizes that every 30 minutes " opening and closing " switches by control module provided by the utility model and industry control module.Therefore, total sampling
Flow every 30 minutes in 4.5L min-1With 16.7L min-1Between automatically switch primary, the cutting grain of corresponding cyclone separator A
Diameter section switches between 0-3 and 0-1 μm.It is real since ToF-ACSM instrument itself can only detect the particulate matter less than 2.5 μm
Border, which samples partial size section, to be switched between 0-2.5 and 0-1 μm, and temporal resolution is 2 minutes, realizes an instrument to PM2.5With
PM1The real time on-line monitoring of chemical constituent.
When Atmospheric particulates sampling system provided by the utility model works, following steps are executed:
1) it is directed to grain-size of atmospheric particulate substance section of interest, chooses the efficient cyclone separator for being directed to specified particle diameter section, such as
It is realization PM in the utility model embodiment2.5And PM1Switching has selected URG company 2000-30EHB type efficient cyclone to separate
Device, the optimum Cutting particle size range of the model separator are 1~3 μm, and corresponding flow is 16.7~4.5Lmin-1；
2) the corresponding flow of partial size section of interest is determined according to the cyclone separator incising control flow curve of selection, such as originally
PM in utility model embodiment1Corresponding flow is 16.7L min-1；
3) the primary drainage gas circuit of design and flow needed for each branch in secondary drainage gas circuit, configure critical flow for each branch
Hole, as the flow of drainage gas circuit primary in the utility model embodiment and secondary drainage gas circuit is respectively set to 4.5 L min-1With
12.2L min-1, then the critical flow orifice of corresponding flow is configured for corresponding branch, the flow of each branch uses flowmeter online
Monitoring.When realizing the switching of multiple partial sizes, multiple gas circuit branches are set in secondary drainage gas circuit；The flow control of metering orifice needs
Flow is tested, different size of aperture can control different flows.
Specifically, always sampling gas circuit by three-way connection connect efficient cyclone separator gas outlet, instrument sampling gas circuit and
Secondary drainage gas circuit；It is connected between efficient cyclone separator and Nafion airflow drying tube at least through one section of U-bend curved tube；It is secondary
Grade drainage air circuit connection HEPA filter, flowmeter, multiple solenoid valves and critical flow orifice combination, and pass through two pass ball valves and true
Sky pump is connected；Sampling pipe leads to each component by two and three-way connection is connected；
Instrument samples air circuit connection Nafion airflow drying tube and online monitoring instruments；Again by three-way connection with into
Sample gas circuit is connected with primary drainage gas circuit；The combination of HEPA filter-flowmeter-solenoid valve-critical flow orifice is connected, and is accessed
Nafion airflow drying tube sheath gas entrance；The outlet of Nafion airflow drying tube sheath gas is connected with vacuum pump, connects in vacuum pump inlet
Two pass ball valves are connect, airflow drying tube sheath gas gas circuit is constituted；Sampling air flow after drying, which enters in monitoring station room, to be connected to
Line monitoring instrument；
4) relay in each solenoid valve power supply terminal (port of solenoid valve positive and negative anodes power supply) and industry control module is connected
Mould group；
5) communication between computer control module and the industry control card of industry control module is established, the configuration channel industry control card DO is corresponding
Each solenoid valve；
6) manual switching mode or automatic switchover mode are set by computer control module, switches opening for each solenoid valve
It closes；
A. address and the filename for inputting text file, for storing the operation result of computer control module, including electricity
The time of open and-shut mode and solenoid valve " opening/closing " the state switching moment of magnet valve；When computer control module is run, if solenoid valve
State switching, then be written corresponding information to text file；
B. manually or automatically switch mode is selected.For manual switch mode, user can voluntarily switch each solenoid valve
Opening and closing；If needing the initial state (open or close) for inputting each solenoid valve using automatic switchover mode and automatically switching the time
Step-length；
C. user can terminate at any time after bringing into operation, and stop switching.
Industry control module connects each supply port and signal port by electric wire, and by USB or RS232 data line and calculates
Machine is connected, and then provides trigger signal by computer control module, controls circuit locating for supply port by relay mould group
On-off, and then control the opening and closing of atmospheric sampling system solenoid valve；By adjust primary drainage gas circuit in atmospheric sampling system and
The flow of secondary drainage gas circuit, changes the incising control of efficient cyclone separator；
The particulate matter incising control of efficient cyclone separator is controlled by total sampling flow；Total sampling flow is instrument itself
The sum of sampling flow, primary drainage gas circuit flow and secondary drainage gas circuit flow；
By aforesaid operations, realize that more partial size sections automatically switch the sampling of Atmospheric particulates.
The utility model provides computer control module and industry control module, to be controlled automatically to the opening and closing of multiple solenoid valves
System.As shown in Fig. 2, industry control module is mainly by Switching Power Supply, industry control card, Switching Power Supply, relay mould group, circuit and supply port
Composition.Safety and convenience in view of actual implementation process, the electromagnetism that the utility model embodiment is powered using direct current 24V
Valve, industry control card and relay mould group.The utility model embodiment uses two solenoid valves, therefore relay mould group includes two only
The relay of vertical control；Industry control card digital signal exports (DO) and triggers disconnected be connected with each relay signal；Relay and Fig. 1 institute
Show that solenoid valve E is connected, the corresponding solenoid valve of each relay.The following are the utility model embodiment industry control module working principles
Detailed description.
Switching Power Supply one end is connected into alternating current (220V), and output 24V direct current is that solenoid valve, industry control card and relay mould group supply
Electricity.Relay mould group includes two relays altogether, and relay common end (COM) connects 24V direct current anode, solenoid valve anode with after
Electric appliance normally open end (NO) is connected, and solenoid valve cathode is connected with 24V direct current cathode, relay signal end (IN1 or IN2) and industry control
Block the channel DO anode to be connected, industry control card DO channel cathode is connected with 24V direct current cathode.When there is high level triggering at relay signal end
When signal, relay is attracted, and common end is engaged with normally open end, closing of circuit where solenoid valve, is "On" state；When relay is believed
When number end is low level trigger signal, relay release, relay common end connect with normal-closed end, and solenoid valve place circuit breaks
It opens, is " closing " state.The utility model embodiment uses the industry control of the USB-6002 model of National Instrument company
Card, can be connected by USB with computer, and it is logical to control industry control card DO by computer controlled automatic module designed by the utility model
The signal in road exports, and controls solenoid valve " opening/closing " state.Industry control card provides high RST or low signal；If in industry control module after
Electric appliance receives high RST, then circuit is logical, and solenoid valve is opened；If relay receives low signal, circuit is obstructed, and solenoid valve closes.
The following are the front panel of control module in the utility model embodiment and the detailed descriptions of workflow.Such as Fig. 3 institute
Show, control module front panel mainly includes record file path, and primary and secondary drains solenoid valve control module.Primary and secondary
It is identical to drain contained content in solenoid valve control module, including industry control card DO channel selecting menu, control model selection key, electromagnetism
Valve " opening and closing " state set key automatically controls switching time input frame and terminates key.The utility model embodiment is two partial sizes
Section switching, therefore only 1 solenoid valve in secondary drainage solenoid valve control module.It can be added according to demand in practical application multiple
The control of solenoid valve.
Before control module operation, user needs the filename and storing path of input record file, will be prompted in input field
The filename and path that last time uses, the record file are text file, are mainly used for saving each solenoid valve open and-shut mode
And switching moment information；Then the corresponding channel industry control card DO is selected for each solenoid valve；Control mould is selected by selection key again
Formula is to be automatically or manually controlled.If selection manually controls, directly start " opening/closing " the state progress that circulation per second reads solenoid valve
Control, until user presses " terminating key " in the module, terminator；If desired it automatically controls, then it should be first automatic
Mode column is arranged initial " opening/closing " state of solenoid valve by key, and inputs switching time (unit: second), after setting completed,
It selects to automatically control by key in control model selection, starts timing.It is manual for defaulting initial mode.If automatic control
Control model, solenoid valve will be recycled " opening/closing " switching according to the switching time of setting, until user presses mode and corresponds to
" terminate key ", terminate instrument operation.Each solenoid valve is corresponding with indicator light, and indicator light is bright to open, and indicator light off to close.
The workflow of computer control module is as shown in figure 4, each solenoid valve control principle is identical, therefore following steps
Only by taking the control of 1 solenoid valve as an example, comprising the following steps:
1) bring into operation computer control module, enters step 2)；
2) it reads in front panel and inputs information, store path and the corresponding industry control of filename, solenoid valve including recording file
Block the channel DO, if initial " opening/closing " state of automatic mode setting solenoid valve and switching time step-length, is arranged if manual mode
Solenoid valve " opening/closing " state, selects control mode for automatic or manual by key, and starting is recycled into step 3)；
3) judgment step 2) in read in control mode whether be automatic mode, if then enter automatic switchover mode, packet
Containing 41) to 412) 12 sub-steps；Otherwise enter manual switching mode, comprising 51) to 59) 9 sub-steps；
4) automatic switchover mode includes following sub-step:
41) read step 2) switching time of initial " opening/closing " state of solenoid valve and input for being read in from front panel, unit
For the second；
42) judge whether solenoid valve original state is "ON", if then entering step 43), otherwise enter step 44)；
43) original state of solenoid valve is "ON" in step 42), to the corresponding high electricity of the channel industry control card DO output of solenoid valve
Ordinary mail number, trigger relay be attracted, electromagnetic valve circuit access, solenoid valve open, and in text file record solenoid valve " open/
Close " time of state and current time, it is entered step 45) after being finished；
44) original state of solenoid valve is " closing " in step 42), exports low electricity to the corresponding channel industry control card DO of solenoid valve
Ordinary mail number, trigger relay release, electromagnetic valve circuit disconnect, solenoid valve close, and in text file record solenoid valve " open/
Close " time of state and current time, it is entered step 45) after being finished；
45) timing is reset, and restarts timing, unit is the second, executes judgment step 46)；
46) judge whether timing time is equal to the automatic switchover time step read in step 41), if then entering step
410) it, otherwise enters step 47)；
47) it reads automatic mode and terminates key logic state, then execute judgment step 48)；
48) judgment step 47) in read in termination key logic state whether be 1, if then terminating operation, otherwise enter
Step 49)；
49) it is incremented by timing time in seconds, is returned to step 46) after being finished；
If 410) judge that timing time is equal to the switching time step-length of setting in step 46), judgment step is executed
410), judge whether solenoid valve " opening/closing " state recorded when last round of circulation is "ON", it is no if then entering step 411)
It then enters step 412)；
411) low level signal, trigger relay release, solenoid valve electricity are exported to the corresponding channel industry control card DO of solenoid valve
Road disconnect, solenoid valve close, realize solenoid valve state by "ON" → " closing " switch, and in text file record solenoid valve " open/
Close " time of state and current time, it is returned to step 45) after being finished；
412) high level signal is exported to the corresponding channel industry control card DO of solenoid valve, trigger relay is attracted, solenoid valve electricity
Road closure, solenoid valve open, realize solenoid valve state by " closing " → "ON" switch, and in text file record solenoid valve " open/
Close " time of state and current time, it is returned to step 45) after being finished；
5) manual switching mode includes following sub-step:
51) " opening/closing " the setting state of solenoid valve under manual mode is read in from front panel, executes judgment step 52)；
52) whether the setting state for judging solenoid valve is "ON", if then entering step 53), is otherwise entered step 54)；
53) high level signal is exported to the corresponding channel industry control card DO of solenoid valve, trigger relay is attracted, electromagnetic valve circuit
Closure, solenoid valve are opened, and the time of solenoid valve " opening/closing " state and current time are recorded in text file, after being finished
It enters step 55)；
54) low level signal, trigger relay release, electromagnetic valve circuit are exported to the corresponding channel industry control card DO of solenoid valve
It disconnects, solenoid valve is closed, and the time of solenoid valve " opening/closing " state and current time is recorded in text file, after being finished
It enters step 55)；
55) timer is reset, and starts timing, and reads the logic state that manual mode terminates key, then executes judgement
Step 56)；
56) judgment step 55) in read in termination key logic state whether be 1, if then terminating operation, otherwise enter
Step 57)；
57) the solenoid valve state that setting is read from front panel, then executes judgment step 58)；
58) judgment step 57) in the solenoid valve setting state read in whether with last round of step 53) or 54) in record
Solenoid valve state is identical, if "Yes", that is, solenoid valve state is constant, thens follow the steps 59), otherwise returns to step 52).
59) timing time is incremented by, and unit is the second, i.e., reads within every mistake one second the solenoid valve state of front panel setting.
In above-mentioned apparatus, aerosol is can be used in the Atmospheric particulates component online monitoring instruments connecting with atmospheric sampling system
Mass spectrograph (including Q-AMS, HR-ToF-AMS), aerosol chemistry composition monitor (including ACSM, ToF- ACSM), organic carbon/
The instruments such as element carbon analyzer (OC/EC), online water soluble ion analyzer (including WAGA, IGAC, MARGA).Wherein, gas
Colloidal sol mass spectrograph and aerosol chemistry composition detector and other on-line checking instrument different froms, its own can be to particulate matter
Partial size is cut, but is only capable of cutting a kind of partial size (sub-micron or 2.5 microns).
When it is implemented, if Atmospheric particulates component online monitoring instruments use incising control for 2.5 microns of aerosol
Chemical composition monitor ToF-ACSM；Particularly, when need to only realize that two partial size sections automatically switch, due to ToF-ACSM sheet
Body can cut 2.5 microns, therefore only need to increase a partial size, and computer control module and industry control module can not be used to control
The mode of power supply component (solenoid valve) opening and closing changes the incising control of efficient cyclone separator, and only need to be using a kind of settable
The circulation time-delay relay of duration, " opening/closing " shape for solenoid valve in loop control secondary drainage gas circuit (an only branch)
State, primary drainage gas circuit are then served only for reducing particulate matter in the residence time of sampling system, to reduce measurement error；Its flow
It is constant, therefore do not need configuration solenoid valve control；So that aerosol chemistry composition monitor ToF- ACSM is original to can be achieved one
The cutting of kind of partial size changes into as two partial size sections can be achieved and is cut, but above-mentioned apparatus design be not suitable for it is organic
Carbon/element carbon analyzer and online water-soluble analyzer etc. itself can not cut the on-line checking instrument of particle size, and nothing
Method realizes the automatic switchover and On-line Control and record solenoid valve state etc. of more partial size sections.
It should be noted that the purpose for publicizing and implementing example is to help to further understand the utility model, but this field
Technical staff be understood that and do not departing from the utility model and spirit and scope of the appended claims, various replacements and
Modification is all possible.Therefore, the utility model should not be limited to embodiment disclosure of that, the requires of the utility model protection
Range subject to the scope defined in the claims.
Claims (10)
1. a kind of sampling apparatus for atmospheric particulate matter that more partial size sections automatically switch, including atmospheric sampling system, industry control module and meter
Calculation machine control module；Atmospheric sampling system is connected to the front end of Atmospheric particulates component online monitoring instruments；Pass through industry control module
The opening and closing for jointly controlling the solenoid valve in atmospheric sampling system with computer control module realizes that more partial size sections automatically switch；Its
In:
Atmospheric sampling system include efficient cyclone separator, Nafion airflow drying tube, HEPA filter, solenoid valve, vacuum pump,
Critical flow orifice, flowmeter, two pass ball valves and gas piping；The gas piping include total sampling gas circuit, primary drainage gas circuit,
Secondary drainage gas circuit, instrument sampling gas circuit and airflow drying tube sheath gas gas circuit；The airflow drying tube sheath gas gas circuit and it is described just
Grade drainage gas circuit is same gas circuit；
Total sampling gas circuit connects the gas outlet of efficient cyclone separator by three-way connection, instrument samples gas circuit and secondary is drawn
Gas road；One section of U-bend curved tube is included at least between the efficient cyclone separator and Nafion airflow drying tube；The secondary
Air circuit connection HEPA filter, flowmeter, multiple solenoid valves and critical flow orifice combination are drained, and passes through two pass ball valves and vacuum
Pump is connected；The instrument sampling air circuit connection Nafion airflow drying tube and online monitoring instruments；The instrument sampling gas circuit is logical
It crosses three-way connection and is divided into instrument sample introduction gas circuit itself and primary drainage gas circuit, connect HEPA filter-flowmeter-solenoid valve-
Critical flow orifice combination, and access the sheath gas entrance of the Nafion airflow drying tube；The sheath of the Nafion airflow drying tube
Gas outlet is connected with vacuum pump, connects two pass ball valves in vacuum pump inlet, constitutes airflow drying tube sheath gas gas circuit；
The particulate matter incising control of the efficient cyclone separator is controlled by total sampling flow；Sampling air flow is by efficient cyclone point
Particle size cutting is realized from device；
Industry control module includes Switching Power Supply, industry control card, relay mould group, circuit and supply port；Industry control module is connected by electric wire
Each supply port and signal port are connect, and is connected by data line with computer；The signal path of industry control card corresponds to atmospheric sampling
Each solenoid valve in system；Industry control card is communicated by signal path with computer control module foundation；Computer control module
It controls industry control card corresponding channel and issues signal, so that the relay mould group by industry control module controls circuit locating for supply port
On-off, and then control the opening and closing of atmospheric sampling system solenoid valve, thus adjust primary drainage gas circuit in atmospheric sampling system and
The flow of secondary drainage gas circuit, changes the incising control of efficient cyclone separator, is achieved in the big of more partial size sections automatic switchovers
The sampling of aerated particle object.
2. the sampling apparatus for atmospheric particulate matter that more partial size sections as described in claim 1 automatically switch, characterized in that total sample streams
Amount is Atmospheric particulates component online monitoring instruments sampling flow itself, primary drainage gas circuit flow and secondary drainage gas circuit flow
The sum of.
3. the sampling apparatus for atmospheric particulate matter that more partial size sections as described in claim 1 automatically switch, characterized in that the gas
The material view gas circuit function of pipeline uses different materials；The stainless steel tube of inner wall polishing can be used in gas circuit for instrument sampling；
Teflon pipe or copper pipe can be used in remaining gas circuit.
4. the sampling apparatus for atmospheric particulate matter that more partial size sections as claimed in claim 3 automatically switch, characterized in that be used for instrument
The gas circuit of sampling includes total sampler road and instrument sampling gas circuit.
5. the sampling apparatus for atmospheric particulate matter that more partial size sections as described in claim 1 automatically switch, characterized in that computer control
The mode of molding block trigger circuit on-off includes automatic control mode and MANUAL CONTROL mode；Automatic control mode has self-clocking
Function, may be selected initial " opening/closing " state of each solenoid valve, and set the time interval of opening and closing variation, recycle trigger circuit,
Change the opening and closing of the control each solenoid valve of atmospheric sampling system by connecting and disconnecting of the circuit；MANUAL CONTROL mode passes through single trigger circuit
On-off directly controls the opening and closing of every way solenoid valve.
6. the sampling apparatus for atmospheric particulate matter that more partial size sections as claimed in claim 5 automatically switch, characterized in that computer control
Molding block uses automatic control mode trigger circuit on-off, and automatically saves text data file, records opening for every way solenoid valve
Closed state, variation and corresponding variation time of origin.
7. the sampling apparatus for atmospheric particulate matter that more partial size sections as described in claim 1 automatically switch, characterized in that industry control module
It is connected especially by USB or RS232 data line with computer.
8. the sampling apparatus for atmospheric particulate matter that more partial size sections as described in claim 1 automatically switch, characterized in that adopted with atmosphere
Aerosol mass spectrometer, aerosol chemistry composition monitoring can be used in the Atmospheric particulates component online monitoring instruments of sample system connection
Instrument, organic carbon/element carbon analyzer, online water soluble ion analyzer.
9. the sampling apparatus for atmospheric particulate matter that more partial size sections as claimed in claim 8 automatically switch, characterized in that aerosol matter
Spectrometer includes Q-AMS, HR-ToF-AMS；It includes ACSM, ToF-ACSM that aerosol chemistry, which forms monitor,；Organic carbon/elemental carbon
Analyzer is OC/EC；Online water soluble ion analyzer includes WAGA, IGAC, MARGA.
10. a kind of sampling apparatus for atmospheric particulate matter that two partial size sections automatically switch, characterized in that including atmospheric sampling system and one
The circulation time-delay relay of a settable duration；
The atmospheric sampling system is connected to the front end of Atmospheric particulates component online monitoring instruments；The Atmospheric particulates component
Online monitoring instruments use incising control to form monitor ToF-ACSM for 2.5 microns of aerosol chemistry；
Atmospheric sampling system include efficient cyclone separator, Nafion airflow drying tube, HEPA filter, solenoid valve, vacuum pump,
Critical flow orifice, flowmeter, two pass ball valves and gas piping；The gas piping include total sampling gas circuit, primary drainage gas circuit,
Secondary drainage gas circuit, instrument sampling gas circuit and airflow drying tube sheath gas gas circuit；The airflow drying tube sheath gas gas circuit and it is described just
Grade drainage gas circuit is same gas circuit；
The circulation time-delay relay of the settable duration, the opening and closing shape for solenoid valve in loop control secondary drainage gas circuit
State；Secondary drainage gas circuit only has a branch；Primary drainage gas circuit is subtracted by reducing particulate matter in the residence time of sampling system
Small measurement error；
Two partial size sections are achieved in be cut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821300916.9U CN208953340U (en) | 2018-08-13 | 2018-08-13 | Two partial size sections or more partial size sections automatically switch sampling apparatus for atmospheric particulate matter |
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|---|---|---|---|
| CN201821300916.9U CN208953340U (en) | 2018-08-13 | 2018-08-13 | Two partial size sections or more partial size sections automatically switch sampling apparatus for atmospheric particulate matter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760415A (en) * | 2018-08-13 | 2018-11-06 | 北京大学 | More grain size sections automatically switch sampling apparatus for atmospheric particulate matter and the automatic method of sampling |
| CN113406114A (en) * | 2021-04-28 | 2021-09-17 | 中国辐射防护研究院 | Combined analysis method for content of Pu, Am and U in aerosol |
| CN113607612A (en) * | 2021-09-06 | 2021-11-05 | 暨南大学 | Cloud and mist activation and gap particle measuring device based on unmanned aerial vehicle |
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2018
- 2018-08-13 CN CN201821300916.9U patent/CN208953340U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760415A (en) * | 2018-08-13 | 2018-11-06 | 北京大学 | More grain size sections automatically switch sampling apparatus for atmospheric particulate matter and the automatic method of sampling |
| CN108760415B (en) * | 2018-08-13 | 2023-11-24 | 北京大学 | Multi-particle-size-section automatic switching atmospheric particulate sampling device and automatic sampling method |
| CN113406114A (en) * | 2021-04-28 | 2021-09-17 | 中国辐射防护研究院 | Combined analysis method for content of Pu, Am and U in aerosol |
| CN113607612A (en) * | 2021-09-06 | 2021-11-05 | 暨南大学 | Cloud and mist activation and gap particle measuring device based on unmanned aerial vehicle |
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