CN209658132U - Mass spectrograph - Google Patents
Mass spectrograph Download PDFInfo
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- CN209658132U CN209658132U CN201920354976.7U CN201920354976U CN209658132U CN 209658132 U CN209658132 U CN 209658132U CN 201920354976 U CN201920354976 U CN 201920354976U CN 209658132 U CN209658132 U CN 209658132U
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Abstract
The utility model relates to a kind of mass spectrographs, including aerosol particle partial size screening plant and test and analyze device, partial size screening is carried out to superfine particulate matter using aerodynamic principle, evade traditional optical and calibrate defect with electromigration Sieving and casing, so as to it is efficient, accurate, effectively analyze the information such as partial size, chemical composition of superfine particulate matter.
Description
Technical field
The utility model relates to substance detection technique fields, more particularly to a kind of mass spectrograph.
Background technique
Superfine particulate matter refers to particulate matter of the equivalent aerodynamic partial size less than 0.1 μm, i.e. PM0.1.Superfine particulate matter
Influence of the aerosol to human health, global radiation balance and other environmental processes is increasingly significant.
Currently, being difficult to detect by Ultra-fine-particle Size using optical instrument, individual particle mass spectral analysis can not be effectively performed,
Rayleigh scattering can mainly be generated in laser diameter measurement due to superfine particulate matter, and (superfine particulate matter partial size is much smaller than and calibrates laser wave
It is long), cause light scatter intensity fainter, so that very difficult using individual particle mass spectral analysis superfine particulate matter.In addition, using light
When method is calibrated, ionization laser must be positioned at its rear end, and the particle beams may be expanded with the angle of divergence, to reduce grain
Sub- slugging average.
In addition, there are also gone here and there using DMA (Differential Mobility Analyzer, differential electrical mobility analysis instrument)
Join the report of TOFMS (Time of Flight Mass Spectrometer, flight time mass spectrum) analysis superfine particulate matter, but
For this method when sieving specified particles using DMA, there are multi-charge influence, Sieving and casing accuracy is poor.
Utility model content
Based on this, it is necessary to provide a kind of mass spectrograph that can be improved superfine particulate matter granularmetric analysis accuracy.
A kind of mass spectrograph, including aerosol particle partial size screening plant and detection and analysis device；
The aerosol particle partial size screening plant include outer Rotational Cylindrical, interior Rotational Cylindrical, partition, aerosol admission gear with
And conveying gas inlet mechanism；The outer Rotational Cylindrical has hollow conveyor chamber, and the interior Rotational Cylindrical is arranged in the hollow conveying
In chamber, the outer Rotational Cylindrical and interior Rotational Cylindrical coaxial arrangement, the cavity wall of the hollow conveyor chamber and the interior Rotational Cylindrical it
Between have the first gap, the outer Rotational Cylindrical and the interior Rotational Cylindrical can rotate in same direction；The outer Rotational Cylindrical has inlet end
And the outlet side opposite with the inlet end, the partition are arranged in the hollow conveyor chamber and close to the outer Rotational Cylindricals
Inlet end, between the partition and the bottom surface of the interior Rotational Cylindrical have the second gap, the partition be equipped with venthole, it is described
Aerosol admission gear stretches to the inlet end of the outer Rotational Cylindrical and is connected to the venthole；The conveying gas inlet machine
Structure is connected to the inlet end of the outer Rotational Cylindrical and is connected to the hollow conveyor chamber；The outlet side of the outer Rotational Cylindrical be equipped with
The exhaust outlet of the first gap connection, side wall of the outer Rotational Cylindrical close to the outlet side are equipped with and first gap
The screening sample export of connection；
The detection and analysis device is connected to the screening sample export, and the detection and analysis device is used for from the sieve
The sample of sample export output is divided to be analyzed by mass spectrometry.
The conveying gas inlet mechanism is set in the aerosol admission gear in one of the embodiments,.
The aerosol particle partial size screening plant further includes the first fulcrum bearing in one of the embodiments, and described
One fulcrum bearing has the first venting cavity, and the aerosol admission gear and the conveying gas inlet mechanism integrally stretch to described
In first venting cavity, the input terminal of the aerosol admission gear is resisted against on the inner wall of the first venting cavity, first bearing
Seat is equipped with the first air inlet, and first air inlet is connected to the input terminal of aerosol admission gear, the conveying gas into
Mechanism of qi structure is connected to first venting cavity, is additionally provided with the second air inlet in first fulcrum bearing, second air inlet with
The first venting cavity connection.
The periphery of side wall of the screening sample export along the outer Rotational Cylindrical extends in one of the embodiments,.
In one of the embodiments, the aerosol particle partial size screening plant further include screening sample output mechanism,
Exhaust gas output mechanism and the second fulcrum bearing, the screening sample output mechanism are connected to the screening sample export, described useless
Gas output mechanism is connected to the exhaust outlet, and the screening sample output mechanism is set on the exhaust gas output mechanism, described
Second fulcrum bearing has the second venting cavity, and the screening sample output mechanism and the exhaust gas output mechanism integrally stretch to described
In second venting cavity, the output end of the exhaust gas output mechanism is resisted against on the inner wall of the second venting cavity, second fulcrum bearing
It is equipped with the first gas outlet, first gas outlet is connected to the output end of the exhaust gas output mechanism, and the screening sample is defeated
Mechanism is connected to second venting cavity out, is additionally provided with the second gas outlet in second fulcrum bearing, second gas outlet with
The second venting cavity connection.
The mass spectrograph further includes particle focusing device in one of the embodiments, and the particle focusing device has
Input end and the outlet end opposite with the input end, the input end are connected to the screening sample export, the outlet
End is connected to the detection and analysis device.
The particle focusing device is that aerodynamics lens, capillary, static focusing are saturating in one of the embodiments,
Mirror or nozzle.
The mass spectrograph further includes regulator in one of the embodiments, the regulator have cushion chamber with
And the critical hole being connected to the cushion chamber and pressure regulation outlet, the critical hole are connected to the screening sample export, the tune
Mouth is extruded to be connected to the input end of the particle focusing device.
The aperture of the critical hole is 0.07mm~1.85mm in one of the embodiments,.
The mass spectrograph further includes vacuum plant in one of the embodiments, the vacuum plant have vacuum chamber with
And installing port, particulate matter outlet and the vacuum orifice being connected to the vacuum chamber, the vacuum orifice are used to be connected to vacuum pump,
The outlet end of the particle focusing device stretches in the installing port, and the particulate matter outlet connects with the detection and analysis device
It is logical.
The mass spectrograph further includes separation cone in one of the embodiments, and the separation cone is arranged in the vacuum chamber
In, one end of the separation cone is aligned with the outlet end of the particle focusing device, the other end of the separation cone and the inspection
Survey analytical equipment connection.
The separation cone has multiple in one of the embodiments, and multiple separation cones are successively arranged.
The detection and analysis device is flying time mass spectrum analysis device, level four bars analyzer in one of the embodiments,
Or ion strap mass analyzer.
In one of the embodiments, the detection and analysis device include ionisation chamber, ionization laser, field generator,
Detector and analyzer, the ionisation chamber are connected to the screening sample export, and the ionization laser is for emitting laser
Ionize the particulate matter for being passed through the ionisation chamber, the field generator, detector are arranged in the ionisation chamber, described
Field generator be used for generate electric field make ionization after particle fragments fly into the detector, the analyzer with it is described
Detector is electrically connected.
Compared with existing scheme, the utility model has the following beneficial effects:
Above-mentioned mass spectrograph carries out partial size screening to superfine particulate matter using aerodynamic principle, evades traditional optical survey
The defect of diameter and electromigration Sieving and casing, so as to efficient, accurate, effectively analysis superfine particulate matter partial size, chemical group
At etc. information.
Specifically, when above-mentioned mass spectrograph works, aerosol sample is passed through by aerosol admission gear, aerosol sample is logical
It crosses venthole to reach in the second gap, then enter in the first gap from the second gap.It is passed through by conveying gas inlet mechanism
Gas is conveyed, conveying gas is entered in the first gap by partition far from the side of interior Rotational Cylindrical, then enters first by the space
In gap, to convey aerosol movement.As outer Rotational Cylindrical and interior Rotational Cylindrical rotate in same direction conveying gas with certain rate
When the outer Rotational Cylindrical and interior Rotational Cylindrical that rotate by same-directional high-speed, eddy flow is formed, the particulate matter in aerosol sample is transported with eddy flow
It moves and generates centrifugal force, so that particulate matter radially makees centrifugal movement in outer Rotational Cylindrical.While centrifugal movement, with defeated
Gas motion is sent, particulate matter is also by the active force along the first gap length direction.Specific equivalent aerodynamic partial size model
The particulate matter enclosed makees centrifugal movement outer Rotational Cylindrical radially outward, after which passes through the first gap with carrier gas stream,
Just hollow conveyor chamber is left from screening sample export, is tested and analyzed into device is tested and analyzed.Than the aerodynamics
The big particulate matter of equivalent particle size, due to being thrown on hollow conveying cavity wall and stopping axially movable by bigger centrifugal force.
The particulate matter smaller than the equivalent aerodynamic partial size, the centrifugal force being subject to is smaller, does not fly out from screening sample export, thus with
Conveying gas pass through the outer Rotational Cylindrical of the exhaust outlet of the outlet side of outer Rotational Cylindrical discharge.
It is dynamic can to screen out different air by the slewing rate of adjusting outer Rotational Cylindrical and interior Rotational Cylindrical for above-mentioned mass spectrograph
The particulate matter of mechanics equivalent particle size range.
Above-mentioned mass spectrograph is in addition to solving the problems, such as superfine particulate matter individual particle mass spectral analysis, moreover it is possible to while to more large-sized
Grain object carries out individual particle mass spectral analysis, significantly improves mass spectrometric detectability.
Detailed description of the invention
Fig. 1 is the mass spectrometric structural schematic diagram of an embodiment；
Fig. 2 is the structural schematic diagram of aerosol particle partial size screening plant in mass spectrograph shown in Fig. 1.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes public affairs to the utility model
The understanding for opening content is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " setting " in another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" includes
Any and all combinations of one or more related listed items.
Incorporated by reference to Fig. 1 and Fig. 2, the mass spectrograph 10 of an embodiment of the present invention, including aerosol particle partial size screening dress
It sets 100 and tests and analyzes device.
Wherein, aerosol particle partial size screening plant 100 include outer Rotational Cylindrical 1110, interior Rotational Cylindrical 1120, partition 1130,
Aerosol admission gear 1140 and conveying gas inlet mechanism 1150.
Outer Rotational Cylindrical 1110 has hollow conveyor chamber.Interior Rotational Cylindrical 1120 is arranged in hollow conveyor chamber, also, outer rotation
Column 1110 and interior Rotational Cylindrical 1120 are coaxially disposed.There is the first gap between the side wall of hollow conveyor chamber and interior Rotational Cylindrical 1120
1160, outer Rotational Cylindrical 1110 and interior Rotational Cylindrical 1120 can rotate in same direction.
As outer Rotational Cylindrical 1110 and interior Rotational Cylindrical 1120 are rotate in same direction with certain rate, in the first gap 1160
Radial centrifugal force effect of the particulate matter by outer Rotational Cylindrical 1110 in aerosol, so that particulate matter is in outer Rotational Cylindrical 1110
Radially make centrifugal movement.While centrifugal movement, with air motion, particulate matter is also by along 1160 length of the first gap
The active force in direction.
Outer Rotational Cylindrical 1110 outlet side 1222 opposite with inlet end 1152 and inlet end 1152.Partition 1130 is arranged
In hollow conveyor chamber, and partition 1130 is close to the inlet end 1152 of outer Rotational Cylindrical 1110.That is the setting of partition 1130 rotates outside
Between the inlet end 1152 and interior Rotational Cylindrical 1120 of column 1110.Have second between partition 1130 and the bottom surface of interior Rotational Cylindrical 1120
Gap 1170.Partition 1130 is equipped with venthole 1132, and aerosol admission gear 1140 stretches to the inlet end of outer Rotational Cylindrical 1110
It 1152 and is connected to venthole 1132.It is passed through the gas of aerosol admission gear 1140, the can be reached by venthole 1132
In two gaps 1170, then enter in the first gap 1160 from the second gap 1170.
Conveying gas inlet mechanism 1150 is connected to the inlet end 1152 of outer Rotational Cylindrical 1110 and is connected to hollow conveyor chamber.
It is passed through the gas of conveying gas inlet mechanism 1150, first can be entered far from the side of interior Rotational Cylindrical 1120 by partition 1130
In gap 1160, i.e., gas is introduced into the space between partition 1130 and the inlet end 1152 of outer Rotational Cylindrical 1110, then by the sky
Between enter the first gap 1160 in, thus convey aerosol movement.
Wherein, clean air may be selected in the gas for being passed through conveying gas inlet mechanism 1150.Gas is conveyed to pass through in the same direction
When the outer Rotational Cylindrical 1110 and interior Rotational Cylindrical 1120 of high-speed rotation, eddy flow is formed, particulate matter generates centrifugal force with swirling motion.
Outer Rotational Cylindrical 1110 is equipped with the screening sample being connected to the first gap 1160 by the side wall of near outgassing end 1222 and goes out
Mouth 1180.The particulate matter of specific equivalent aerodynamic particle size range is centrifuged fortune in the work radially outward of outer Rotational Cylindrical 1110
Dynamic, the particulate matter is with carrier gas stream by leaving outer Rotational Cylindrical from screening sample export 1180 just behind the first gap 1160
1110.The particulate matter bigger than the equivalent aerodynamic partial size, due to being thrown in hollow conveyor chamber by bigger centrifugal force
Stop axially movable on wall.
The outlet side 1222 of outer Rotational Cylindrical 1110 is equipped with the exhaust outlet 1190 being connected to the first gap 1160.Than above-mentioned air
The small particulate matter of dynamics equivalent particle size, the centrifugal force being subject to is smaller, does not fly out from screening sample export 1180, thus with defeated
By the exhaust outlet 1190 of the outlet side 1222 of outer Rotational Cylindrical 1110 outer Rotational Cylindrical 1110 is discharged in body of supplying gas.
Test and analyze device with screening sample export 1180 be connected to, test and analyze device for from sieve sample export
The sample of 1180 outputs is analyzed by mass spectrometry.
As shown in Fig. 2, the hollow conveyor chamber of outer Rotational Cylindrical 1110 is cylindrical cavity, interior Rotational Cylindrical 1120 is cylinder, outside
Rotational Cylindrical 1110 and interior Rotational Cylindrical 1120 are coaxially disposed, first formed between the side wall of hollow conveyor chamber and interior Rotational Cylindrical 1120
Gap 1160 is ring chamber, the equivalent width of the first gap 1160 everywhere.
Above-mentioned mass spectrograph 10 can be screened out not by the slewing rate of adjusting outer Rotational Cylindrical 1110 and interior Rotational Cylindrical 1120
The particulate matter of same equivalent aerodynamic particle size range.In addition, the equivalent aerodynamic partial size of the particulate matter screened out is also
It is related to the conveying flow velocity of gas, the width in the first gap 1160, length etc. factor.
As shown in Fig. 2, conveying gas inlet mechanism 1150 is set in aerosol admission gear in a wherein example
On 1140.In specific example shown in Fig. 2, aerosol particle partial size screening plant 100 further includes the first fulcrum bearing 1, and first
Fulcrum bearing 1 has the first venting cavity 1201, and aerosol admission gear 1140 and 1150 entirety of conveying gas inlet mechanism stretch to
In first venting cavity 1201.The input terminal 1152 of aerosol admission gear 1140 is resisted against on the inner wall of the first venting cavity 1201,
First fulcrum bearing 1 is equipped with the first air inlet 1202 in the position, and the first air inlet 1202 is defeated with aerosol admission gear 1140
Enter 1152 connection of end, for inputting aerosol sample.First fulcrum bearing 1 be additionally provided be connected to the first venting cavity 1201 second into
Port 1203, for inputting conveying gas, conveying gas inlet mechanism 1150 is connected to the first venting cavity 1201.
As shown in Fig. 2, in a wherein example, periphery of the screening sample export 1180 along the side wall of outer Rotational Cylindrical 1110
Extend.In specific example shown in Fig. 2, aerosol particle partial size screening plant 100 further includes screening sample output mechanism
1210 and exhaust gas output mechanism 1220, screening sample output mechanism 1210 and screening sample export 1180 are connected to, exhaust gas output machine
Structure 1220 is connected to exhaust outlet 1190, and screening sample output mechanism 1210 is set on exhaust gas output mechanism 1220.Aerosol
Grain partial size screening plant 100 further includes the second fulcrum bearing 1230, and the second fulcrum bearing 1230 has the second venting cavity 1231, sieves sample
Product output mechanism 1210 and 1220 entirety of exhaust gas output mechanism stretch in the second venting cavity 1231.Exhaust gas output mechanism 1220
Output end 1222 is resisted against on the inner wall of the second venting cavity 1231, and the second fulcrum bearing 1230 is equipped with the first gas outlet in the position
1232, the first gas outlet 1232 is connected to the output end 1222 of exhaust gas output mechanism 1220.Second fulcrum bearing 1230 be additionally provided with
Second gas outlet 1233 of the second venting cavity 1231 connection, screening sample output mechanism 1210 are connected to the second venting cavity 1231.
In specific example shown in Fig. 2, it is provided with first bearing 1240 in the first venting cavity 1201, conveys gas inlet
Mechanism 1150 is supported in first bearing 1240, and second bearing 1250, screening sample output are provided in the second venting cavity 1231
Mechanism 1210 is supported in second bearing 1250, thus, aerosol particle partial size screening plant 100 is whole by first bearing 1240
It is supported with second bearing 1250.
In specific example shown in Fig. 2, conveys and be additionally provided with shaft gear 1260 in gas inlet mechanism 1150, be used for
Drive Rotational Cylindrical rotation.
As shown in Figure 1, mass spectrograph 10 further includes particle focusing device 300, particle focusing device in a wherein example
300 have input end 310 and the outlet end 320 opposite with input end 310, and input end 310 and screening sample export 1180 connect
Logical, outlet end 320 is connected to device is tested and analyzed.
Optionally, aerodynamics lens, capillary, static focusing lens or nozzle can be selected in particle focusing device 300
Etc..
As shown in Figure 1, mass spectrograph 10 further includes regulator 400 in a wherein example, regulator 400 has
Cushion chamber 410 and the critical hole 420 being connected to cushion chamber 410 and pressure regulation outlet 430, critical hole 420 and screening sample export
1180 connections, pressure regulation outlet 430 are connected to the input end 310 of particle focusing device 300.
Since particle focusing device 300 there are certain requirements sample pressure, such as the portal environment pressure of aerodynamics lens
Power is generally required in hundreds to thousands pa, and standard atmospheric pressure is 101Kpa.(spray is equivalent to by the way that critical hole 420 is arranged
Mouth), make the gas Supersonic Flow at critical hole 420, atmospheric pressure is made to drop to low pressure, and 410 body of cushion chamber is set and buffers sample
Product air-flow guarantees that sample gas can be stablized into progress particle focusing in aerodynamics lens to laminar condition.By setting
Regulator 400 is set, particle focusing device 300 can be enable to stablize running, effective focused particle is moved in narrow particulate beamlet
To in subsequent detection and analysis device.
Wherein, the aperture of critical hole 420 is preferably 0.07mm~1.85mm, such as 0.1mm, when can pass the gas through, is generated
The huge pressure loss.
As shown in Figure 1, mass spectrograph 10 further includes vacuum plant 500 in a wherein example, vacuum plant 500 has
Vacuum chamber 510 and the installing port 520 being connected to vacuum chamber 510, particle outlet and vacuum orifice 540, vacuum orifice 540 are used for
It is connected to vacuum pump, the outlet end 320 of particle focusing device 300 stretches in installing port 520, particulate matter outlet and detection and analysis
Device connection.By be arranged vacuum plant 500, make convey gas be pumped, candidate particles object enter test and analyze device in into
Row detection.
Further, vacuum plant 500 further includes vacuum pump, and vacuum pump is connected to vacuum orifice 540.More preferably, vacuum
Pump selects molecular pump.
Further, as shown in Figure 1, in a wherein example, mass spectrograph 10 further includes separation cone 600, separation cone 600
It is arranged in 510 body of vacuum chamber, one end of separation cone 600 is aligned with the outlet end 320 of particle focusing device 300, separation cone 600
The other end with test and analyze device be connected to.Further, separation cone 600 has multiple, and multiple separation cones 600 are successively arranged, thus
Preferably separation conveying gas and particulate matter.In specific example shown in Fig. 1, there are two separation cones 600.
Optionally, testing and analyzing device can be flying time mass spectrum analysis device, level four bars analyzer or ion trap mass
Analyzer etc..
In a wherein example, detection and analysis device is flying time mass spectrum analysis device 670.
As shown in Figure 1, testing and analyzing device includes ionisation chamber 610, ionization laser 640, electricity in a wherein example
Field generator 650, detector 660 and analyzer 670, ionisation chamber 610 are connected to screening sample export 1180, ionize laser
640 ionize the particulate matter for being passed through ionisation chamber 610 for emitting laser, and field generator 650, the setting of detector 660 exist
In ionisation chamber 610, field generator 650, which is used to generate electric field, makes the particulate matter after ionization fly into detector 660, analyzer
670 are electrically connected with detector 660.
More specifically, as shown in Figure 1, ionisation chamber 610 is vacuum chamber Room 510, equipped with injection port 620 and bleeding point
630.Bleeding point 630 is used to be connected to the vacuum state to keep ionisation chamber 610 with vaccum-pumping equipment (preferably molecular pump).Particle
After object is passed through in ionisation chamber 610 from injection port 620, one section is first passed through without electric field space, enters back into an electric field space, at this point,
Ionization laser 640 emits laser and particulate matter ionization is made to generate cation fragment and anion fragment, cation fragment and negative
Fragment ion back movement under electric field action.A field generator 650 is respectively arranged in two sides in ionisation chamber 610, generates electric field
Make cation fragment and anion fragment divertical motion respectively.It is (optional that a detector 660 is respectively arranged in two sides in ionisation chamber 610
With microchannel plate), cation fragment and anion fragment are transported after divertical motion under the electric field action of field generator 650 respectively
It moves into detector 660.Analyzer 670 (optional computer) and detector 660 are electrically connected, to obtain analysis detector
The signal of 660 detections.660 signal of detector and ionization laser control signal can be by the analyzers 670 with data collecting card
Real-time control is carried out, the information such as corresponding spectrogram, the chemical composition of available particulate matter are analyzed by software.
Wherein, gas laser (such as quasi-molecule ionization laser 640) or Solid State Laser can be selected in ionization laser 640
Device (such as Nd-YAG laser).
Above-mentioned mass spectrograph 10 carries out partial size screening to superfine particulate matter using aerodynamic principle, evades traditional optical
The defect with electromigration Sieving and casing is calibrated, so as to efficient, accurate, effectively analysis superfine particulate matter partial size, chemistry
The information such as composition.
Specifically, when above-mentioned mass spectrograph 10 works, aerosol sample, aerosol are passed through by aerosol admission gear 1140
Sample is reached in the second gap 1170 by venthole 1132, is then entered in the first gap 1160 from the second gap 1170.It is logical
It crosses conveying gas inlet mechanism 1150 and is passed through conveying gas, conveying gas passes through side of the partition 1130 far from interior Rotational Cylindrical 1120
Enter in the first gap 1160 into the first gap 1160, then by the space, to convey aerosol movement.With outer rotation
Column 1110 and interior Rotational Cylindrical 1120 rotate in same direction the outer Rotational Cylindrical that conveying gas is rotated by same-directional high-speed with certain rate
1110 and when interior Rotational Cylindrical 1120, eddy flow is formed, the particulate matter in aerosol sample generates centrifugal force with swirling motion, thus
Particulate matter radially makees centrifugal movement outer Rotational Cylindrical 1110.While centrifugal movement, with conveying gas motion, particle
Object is also by the active force along 1160 length direction of the first gap.The particulate matter of specific equivalent aerodynamic particle size range exists
Outer Rotational Cylindrical 1110 makees centrifugal movement radially outward, after which passes through the first gap 1160 with carrier gas stream, just
Hollow conveyor chamber is left from screening sample export 1180, is tested and analyzed into device is tested and analyzed.Than the aerodynamics
The big particulate matter of equivalent particle size, due to being thrown on hollow conveying cavity wall and stopping axially movable by bigger centrifugal force.
The particulate matter smaller than the equivalent aerodynamic partial size, the centrifugal force being subject to is smaller, does not fly out from screening sample export 1180, from
And outer Rotational Cylindrical 1110 is discharged by the exhaust outlet 1190 of the outlet side 1222 of outer Rotational Cylindrical 1110 with gas is conveyed.
Above-mentioned mass spectrograph 10 can be screened out not by the slewing rate of adjusting outer Rotational Cylindrical 1110 and interior Rotational Cylindrical 1120
The particulate matter of same equivalent aerodynamic particle size range.
Above-mentioned mass spectrograph 10 is in addition to solving the problems, such as superfine particulate matter individual particle mass spectral analysis, moreover it is possible to while to more large-sized
Particulate matter carries out individual particle mass spectral analysis, significantly improves the detectability of mass spectrograph 10.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (14)
1. a kind of mass spectrograph, which is characterized in that including aerosol particle partial size screening plant and test and analyze device；
The aerosol particle partial size screening plant includes outer Rotational Cylindrical, interior Rotational Cylindrical, partition, aerosol admission gear and defeated
It supplies gas body admission gear；The outer Rotational Cylindrical has hollow conveyor chamber, and the interior Rotational Cylindrical is arranged in the hollow conveyor chamber,
The outer Rotational Cylindrical and the interior Rotational Cylindrical coaxial arrangement, have between the cavity wall of the hollow conveyor chamber and the interior Rotational Cylindrical
First gap, the outer Rotational Cylindrical and the interior Rotational Cylindrical can rotate in same direction；The outer Rotational Cylindrical have inlet end and with
The air inlet in the hollow conveyor chamber and close to the outer Rotational Cylindrical is arranged in the opposite outlet side of the inlet end, the partition
End, has the second gap between the partition and the bottom surface of the interior Rotational Cylindrical, the partition is equipped with venthole, the aerosol
Admission gear stretches to the inlet end of the outer Rotational Cylindrical and is connected to the venthole；The conveying gas inlet mechanism connection
In the outer Rotational Cylindrical inlet end and be connected to the hollow conveyor chamber；The outlet side of the outer Rotational Cylindrical is equipped with and described the
The exhaust outlet of one gap connection, side wall of the outer Rotational Cylindrical close to the outlet side, which is equipped with, to be connected to first gap
Sieve sample export；
The detection and analysis device is connected to the screening sample export, and the detection and analysis device is used for from the screening sample
The sample of product outlet output is analyzed by mass spectrometry.
2. mass spectrograph as described in claim 1, which is characterized in that the conveying gas inlet mechanism is set in the aerosol
In admission gear.
3. mass spectrograph as claimed in claim 2, which is characterized in that the aerosol particle partial size screening plant further includes first
Fulcrum bearing, first fulcrum bearing have the first venting cavity, the aerosol admission gear and the conveying gas inlet mechanism
Entirety stretches in first venting cavity, and the input terminal of the aerosol admission gear is resisted against the inner wall of the first venting cavity
On, first fulcrum bearing is equipped with the first air inlet, and first air inlet is connected to the input terminal of aerosol admission gear,
The conveying gas inlet mechanism is connected to first venting cavity, and the second air inlet, institute are additionally provided in first fulcrum bearing
The second air inlet is stated to be connected to first venting cavity.
4. mass spectrograph as described in claim 1, which is characterized in that side wall of the screening sample export along the outer Rotational Cylindrical
Periphery extend.
5. mass spectrograph as claimed in claim 4, which is characterized in that the aerosol particle partial size screening plant further includes screening
Sample output mechanism, exhaust gas output mechanism and the second fulcrum bearing, the screening sample output mechanism go out with the screening sample
Mouth connection, the exhaust gas output mechanism are connected to the exhaust outlet, and it is defeated that the screening sample output mechanism is set in the exhaust gas
Out in mechanism, second fulcrum bearing has the second venting cavity, the screening sample output mechanism and the exhaust gas output mechanism
Entirety stretches in second venting cavity, and the output end of the exhaust gas output mechanism is resisted against on the inner wall of the second venting cavity,
Second fulcrum bearing is equipped with the first gas outlet, and first gas outlet is connected to the output end of the exhaust gas output mechanism,
The screening sample output mechanism is connected to second venting cavity, and the second gas outlet, institute are additionally provided in second fulcrum bearing
The second gas outlet is stated to be connected to second venting cavity.
6. mass spectrograph as claimed in any one of claims 1 to 5, which is characterized in that further include particle focusing device, the particle
Focusing device has input end and the outlet end opposite with the input end, and the input end and the screening sample export connect
Logical, the outlet end is connected to the detection and analysis device.
7. mass spectrograph as claimed in claim 6, which is characterized in that the particle focusing device is aerodynamics lens, hair
Tubule, static focusing lens or nozzle.
8. mass spectrograph as claimed in claim 6, which is characterized in that further include regulator, the regulator has buffering
Chamber and the critical hole being connected to the cushion chamber and pressure regulation outlet, the critical hole are connected to the screening sample export, institute
Pressure regulation outlet is stated to be connected to the input end of the particle focusing device.
9. mass spectrograph as claimed in claim 8, which is characterized in that the aperture of the critical hole is 0.07mm~1.85mm.
10. such as the described in any item mass spectrographs of claim 7~9, which is characterized in that it further include vacuum plant, the vacuum holding
It sets and is used with vacuum chamber and the installing port being connected to the vacuum chamber, particulate matter outlet and vacuum orifice, the vacuum orifice
It is connected in vacuum pump, the outlet end of the particle focusing device stretches in the installing port, the particulate matter outlet and institute
It states and tests and analyzes device connection.
11. mass spectrograph as claimed in claim 10, which is characterized in that further include separation cone, the separation cone is arranged described
In vacuum chamber, it is described separation cone one end be aligned with the outlet end of the particle focusing device, it is described separation cone the other end and
The detection and analysis device connection.
12. mass spectrograph as claimed in claim 11, which is characterized in that separation cone have it is multiple, multiple separation bore according to
Secondary arrangement.
13. such as Claims 1 to 5,7~9,12 described in any item mass spectrographs, which is characterized in that the detection and analysis device is
Flying time mass spectrum analysis device, level four bars analyzer or ion strap mass analyzer.
14. such as Claims 1 to 5,7~9,12 described in any item mass spectrographs, which is characterized in that the detection and analysis device packet
Include ionisation chamber, ionization laser, field generator, detector and analyzer, the ionisation chamber and the screening sample export
Connection, the ionization laser ionize the particulate matter for being passed through the ionisation chamber for emitting laser, and the electric field occurs
Device, detector are arranged in the ionisation chamber, and the field generator, which is used to generate electric field, flies the particle fragments after ionization
Into the detector, the analyzer and the detector are electrically connected row.
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| CN201920354976.7U CN209658132U (en) | 2019-03-20 | 2019-03-20 | Mass spectrograph |
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| CN201920354976.7U CN209658132U (en) | 2019-03-20 | 2019-03-20 | Mass spectrograph |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000978A1 (en) * | 2020-06-30 | 2022-01-06 | 广州禾信仪器股份有限公司 | Aerosol mass spectrometry sampling device having wide particle size range, and aerosol mass spectrometer |
| CN117054299A (en) * | 2023-10-12 | 2023-11-14 | 广东省广州生态环境监测中心站 | On-line real-time monitoring navigation system for suspended particles in water |
-
2019
- 2019-03-20 CN CN201920354976.7U patent/CN209658132U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000978A1 (en) * | 2020-06-30 | 2022-01-06 | 广州禾信仪器股份有限公司 | Aerosol mass spectrometry sampling device having wide particle size range, and aerosol mass spectrometer |
| CN117054299A (en) * | 2023-10-12 | 2023-11-14 | 广东省广州生态环境监测中心站 | On-line real-time monitoring navigation system for suspended particles in water |
| CN117054299B (en) * | 2023-10-12 | 2024-02-27 | 广东省广州生态环境监测中心站 | On-line real-time monitoring navigation system for suspended particles in water |
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