CN207909828U - A kind of headspace sampling device and headspace sampling analysis system - Google Patents
A kind of headspace sampling device and headspace sampling analysis system Download PDFInfo
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- CN207909828U CN207909828U CN201820398943.8U CN201820398943U CN207909828U CN 207909828 U CN207909828 U CN 207909828U CN 201820398943 U CN201820398943 U CN 201820398943U CN 207909828 U CN207909828 U CN 207909828U
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Abstract
The utility model is related to a kind of headspace sampling device and headspace sampling analysis systems.Headspace sampling device embodiment provided by the utility model includes：The main part of column structure, one end set counterbore, and the other end sets sealing hole, penetrated through by intercommunicating pore between counterbore and sealing hole；The aperture of counterbore and the aperture of sealing hole are all higher than the aperture of intercommunicating pore, and the aperture of intercommunicating pore is more than head space pin diameter；Dottle pin is injected, is inserted into counterbore, with counterbore sealing, tight fit；It can be penetrated by head space contact pin；The sampling interconnecting piece of tubular structure, one end connect sampling pipe with sealing hole sealing, tight fit, the other end.Utilize the present embodiment, during mass spectrometer carries out VOC component analyses, perfect it can be connected from note sample is sampled, not only it can meet the injection of head space contact pin but also can have been matched well with sample lines, not only solve sample pre-treatments problem, multiple contact pin sampling is facilitated, and does not introduce any organic solvent, avoids the pollution to instrument.
Description
Technical field
The utility model generally relates to the analysis technical field of volatile organic matter in green technology, and in particular to Yi Zhongding
Empty sampling device and headspace sampling analysis system and method.
Background technology
The problem of environmental pollution that brings of economy rapid development becomes the focus of attention in recent years, and environmental monitoring is from initial air
Middle volatile organic matter (VOC) component analysis develops in water VOC concentration analysis in VOC and soil, and mass spectrograph is as a kind of high
The highly sensitive analytical equipment of precision plays an important role in environmental monitoring.
Mass spectrometer is a kind of gas component and concentration analysis equipment, the volatile organic matter in analyzing water quality
(VOC) timesharing is organized, using this conveniently sample treatment of headspace sampling.This method, you can avoid cumbersome sample
Product pretreatment process, while also eliminating interference of the organic solvent to analysis result.Usual headspace sampling includes five steps：Add
It presses, sample, allocate, note sample and purging.Wherein, note sample is that the VOC volatilized in collected solution is injected into mass spectral analysis
In instrument, final analysis work is then completed by carrier gas purge sample again.Existing mass spectrometer sampling system uses more
Sampling pipe samples, and head-space sampler then uses contact pin to complete note sample, during from note sample is sampled, lacks therebetween
Reliable and stable linking causes easily to lead to pollution problem together when analyzing complex sample using mass spectrometer.
Utility model content
The purpose of this utility model is to provide a kind of headspace sampling device and headspace sampling analysis systems and method.Using
The headspace sampling device that the utility model embodiment provides can make during carrying out VOC component analyses using mass spectrometer,
It perfect can be connected from note sample is sampled, can not only meet the injection of head space contact pin but also can have been matched well with sample lines.
In an embodiment of headspace sampling device provided by the utility model comprising：
Main part is column structure, and one end sets counterbore, and the other end sets sealing hole, between the counterbore and the sealing hole
It is penetrated through by intercommunicating pore；The aperture of the counterbore and the aperture of the sealing hole are more than the aperture of the intercommunicating pore, the intercommunicating pore
Aperture be more than head space contact pin diameter；
Dottle pin is injected, one end is inserted into the counterbore, with counterbore sealing, tight fit；It, can using elastic material
It is penetrated by the head space contact pin；
Interconnecting piece is sampled, is tubular structure, one end connects sampling pipe with sealing hole sealing, tight fit, the other end.
In some embodiments, the sealing hole is equipped with inside tapered thread；
One end of the sampling interconnecting piece sets outer cone thread；The inside tapered thread is tightly connected with the outer cone thread.
In some embodiments, the outer wall of the main part is close to one end of the sealing hole, along the length of the main part
Platform is tightened in degree direction equipped with 2 or more, is clamped for spanner.
In some embodiments, the outer wall of the main part is equipped with installation nut.
In some embodiments, the main part is cylindric, is manufactured using aluminium；The injection dottle pin is rubber material
Matter.
In some embodiments, the main part is equipped with one end of counterbore, extends radially outward an ear platform.
In some embodiments, one end of the injection dottle pin is inserted into the counterbore, and it is flat that the other end compresses the ear
Platform.
In some embodiments, further include：
Lid is made of aluminium, thickness 0.2mm-1mm, closely coats the injection dottle pin and the ear platform.
The utility model also provides a kind of embodiment of headspace sampling analysis system, including：
Using the headspace sampling device in above-described embodiment；
Pass sequentially through head-space sampler, drier, four-way valve and the mass spectrometer of pipeline connection；Further include：
Shell, for the headspace sampling device, the drier, the four-way valve and the mass spectral analysis to be fixedly mounted
Instrument.
The headspace sampling device and headspace sampling analysis system and method that the utility model embodiment is provided, can make in profit
During carrying out VOC component analyses to gas to be analyzed with mass spectrometer, perfect it can be connected from note sample is sampled, it both can be with
Meet the injection of head space contact pin and can be matched well with sample lines, not only solve sample pre-treatments problem, facilitates repeatedly
Contact pin samples, and does not introduce any organic solvent, avoids the pollution to instrument.
Description of the drawings
Fig. 1 show one example structure schematic diagram of the utility model headspace sampling device；
Fig. 2 show Fig. 1 shown device A-A sectional views；
Fig. 3 show one embodiment flow chart of the utility model headspace sampling analysis system；
Fig. 4 show four-way valve state when mass spectrometer works in system shown in Figure 3；
Fig. 5 show four-way valve state when mass spectrometer does not work in system shown in Figure 3.
Reference sign：
10- headspace sampling devices；
100- main parts；
1001- counterbores；1002- sealing holes；1003- intercommunicating pores；1004- ear platforms；
200- injects dottle pin；
300- samples interconnecting piece；
3001- fittings bodies；3002- cutting ferrules；3003- fastening nuts；
20- driers；
30- four-way valves；
The first valve ports of 301-；The second valve ports of 302-；303- third valve ports；The 4th valve ports of 304-；
40- mass spectrometers.
Specific implementation mode
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when the embodiment of the utility model and its various aspects.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than limitations of the present invention.
One embodiment of headspace sampling device provided by the utility model, as shown in Figure 1, including：Main part 100, injection
Dottle pin 200 and sampling interconnecting piece 300.
Fig. 2 show the A-A sectional views of headspace sampling device embodiment shown in Fig. 1.As shown in Fig. 2, main part 100 is column
Shape structure, one end are equipped with counterbore 1001, and the other end is equipped with sealing hole 1002, by intercommunicating pore between counterbore 1001 and sealing hole 1002
1003 perforations.The aperture of counterbore 1001 and the aperture of sealing hole 1002 are more than the aperture of intercommunicating pore 1003, the hole of intercommunicating pore 1003
Diameter is more than the diameter of head space contact pin.Wherein, the aperture of intercommunicating pore 1003 is smaller to get on the basis of more than head space pin diameter
It is good, to avoid gas residue to be analyzed on the pipeline of headspace sampling device, cause analysis result inaccurate.
Any material may be used as former material in main part 100 in principle, as long as can ensure to meet requirement.
But from actual application, in a specific embodiment, main part 100 uses aluminium as former material, is not only easy to process,
Overall weight is also relatively lighter, and has preferable economy.
The one end for injecting dottle pin 200 is inserted into counterbore 1001, with the sealing of counterbore 1001, tight fit；The other end protrude or
In recessed counterbore 1001, but being recessed cannot be too many, should ensure that head space contact pin can penetrate injection dottle pin and be analysed to gas
It introduces in intercommunicating pore 1003.When the other end for injecting dottle pin 200 protrudes main part 100, it should ensure that and be inserted into counterbore 1001
The sealing of one end and counterbore 1001 should not be loosened with closely when head space contact pin repeatedly plugs.
Inject dottle pin 200 select elastic material, on the one hand be inserted into counterbore 1001 in when, using elastic material expansion with
The sealing of counterbore 1001 is fitted close；On the other hand to facilitate head space contact pin that can penetrate injection dottle pin 200, it is analysed to gas
It introduces in intercommunicating pore 1003.In a specific example in real time, injection dottle pin uses rubber as former material, the hardness of rubber, bullet
Property and so that it is very good with the sealing effect and fiting effect of counterbore 1001 with outside expansion when being squeezed.
In the present embodiment, sampling interconnecting piece 300 is tubular structure, specifically can be by steel pipe as base material.Sampling connects
One end of socket part 300 and the sealing of sealing hole 1002, tight fit；The other end connects sampling pipe.In other embodiments, main part
100 can also be an integral molding structure with sampling interconnecting piece 300, eliminate sampling interconnecting piece 300 and the sealing of main part 100 connects
It connects.But do so, it is possible to when a certain partial destruction needs replacing, it is necessary to whole part is replaced, not as good as separately making it
The good economy performance made.
In one embodiment, it samples between interconnecting piece 300 and sealing hole 1002 and is sealed using taper thread.Sealing hole
1002 are equipped with inside tapered thread, and one end of sampling interconnecting piece 300 sets outer cone thread.The inside tapered thread of sealing hole 1002 is connected with sampling
The outer cone thread in portion 300 is tightly connected.Under normal conditions, the tooth form of tapered tread is triangle, is protected mainly by the deformation of tooth
The tight type for demonstrate,proving screw thread pair, is chiefly used in pipe fitting.Taper pipe thread has 16:1 taper, because this characteristic to be wrapped in spiral shell
Raw material band on line can be more evenly distributed on screw thread, have better seal, while steel pipe used in taper pipe thread
Wall is thicker, has more great number resistance to pressure, therefore such screw thread is commonly used and seals liquids and gases, can play close well
Seal effect.In general, 300 outer cone thread in sampling interconnecting piece twines raw material band, the inner cone spiral shell of outer cone thread and sealing hole 1002
Line, which presses raw material band, to be filled up thread gaps and reaches sealing effect.
In general, sampling interconnecting piece 300 is made of fittings body 3001, cutting ferrule 3002 and fastening nut 3003.In fittings body
3001 one end outer surface sets outer cone thread, seals with the inside tapered thread of sealing hole 1002, closely connect.Using seamless steel pipe according to
The secondary other end for being inserted into fastening nut 3003, cutting ferrule 3002 and fittings body 3001；When cutting ferrule 3002 and fastening nut 3003 are sleeved on
After being inserted into fittings body 3001 on seamless steel pipe, fastening nut 3003 is screwed, at this point, 3002 front end outer side of cutting ferrule and fittings body 3001
The conical surface is bonded, and inner edge equably bites seamless steel pipe, forms effectively sealing.
Head space contact pin can penetrate injection dottle pin 200, be analysed to gas and introduce in intercommunicating pore 1003, then sampled company
Socket part 300 enters in sampling pipe.In the process, it seals sealing between dottle pin 200 and counterbore 1001, be fitted close, sampling connects
It seals, be fitted close between socket part 300 and sealing hole 1002.Gas to be analyzed introduces intercommunicating pore 1003 through head space contact pin, then arrives
Then sampling pipe enters instrument through each pipeline and is analyzed, realize from the perfect linking for sampling note sample, can both meet
The injection of head space contact pin can be matched with sample lines well again, not only solve sample pre-treatments problem, and do not introduce any
Organic solvent avoids the pollution to instrument.
Since injection dottle pin 200 is that have elasticity and expansive force, after head space contact pin penetrates injection dottle pin 200, it is injected
Dottle pin 200 is squeezed, and will not be leaked.In head space contact pin after being extracted in injection dottle pin 200, in elasticity and expansion force effect
Under, the hole that head space contact pin penetrates injection dottle pin 200 is filled, and still ensure that good sealing effect, while also can guarantee top
The multiple plug of empty contact pin samples.
In one embodiment, main part 100 is cylindric, in one end equipped with counterbore 1001, is extended radially outward out
One ear platform 1004.At this point, one end of injection dottle pin 200 is inserted into counterbore 1001, the other end compresses ear platform 1004.With
This further includes the lid made of aluminium simultaneously, in the embodiment, and thickness is about 0.2mm-1mm, this lid closely coats
In the outside of injection dottle pin 200 and ear platform 1004.One end of either injection dottle pin 200 compresses ear platform 1004, also
It is the outside that lid is closely coated on injection dottle pin 200 and ear platform 1004, all so that injection dottle pin 200 and main part 100
Between sealing effect it is more preferable, more securely, the multiple plug of head space contact pin is facilitated to sample.Old injection can also be removed when necessary
Dottle pin 200 recycles pressure brank to install new injection dottle pin 200.
In one embodiment, installing and using for convenience of the device, main part 100 outer wall close to sealing hole 1002
One end, the length direction along main part 100 tighten platform equipped with 2 or more, the clamping of spanner when facilitating installation.Wherein,
It can be radially prominent to tighten platform；Can also be the flat plane of ream, either outwardly projecting plane or ream are flat
Plane, be along the length direction of main part 100, radially or inwardly.Certainly, the flat plane of ream should ensure that not
It influences sealing hole 1002 and samples the sealing of interconnecting piece 300, be fitted close effect.The plane outwardly protruded should not also influence the dress
That sets installs and uses.
Meanwhile in this embodiment, the outer wall of main part 100 is additionally provided with installation nut, facilitates installation.In a specific implementation
In example, installation nut has 2, and when installing the device, main part 100 is passed through mounting plate, is then distinguished in the both sides of mounting plate
Locking is squeezed with installation nut, on a mounting board by the fastening of main part 100.It can also be in some portion of the centre of main part 100
Position extends radially outward out a platform, makes main part 100 be in the mounting hole on mounting plate, this platform can play resistance
Gear acts on, and then squeezes locking in the another side of mounting plate installation nut, makes the fastening of main part 100 on a mounting board.It prevents
Repeatedly plug sample introduction causes sample introduction pipeline because stress repeatedly causes seal failure
The utility model additionally provides a kind of embodiment of headspace sampling analysis system, as shown in figure 3, for the stream of the system
Journey schematic diagram.The system uses the headspace sampling device 10 in above-described embodiment, which includes：Pass sequentially through pipeline connection
Headspace sampling device 10, drier 20, four-way valve 30 and mass spectrometer 40, wherein headspace sampling device 10, drier 20,
Four-way valve 30 and mass spectrometer 40 are mounted on shell.Headspace sampling device 10 is fixed on a mounting board, and head space contact pin is worn
Injection dottle pin 200 is inserted into counterbore or intercommunicating pore thoroughly, and sampling interconnecting piece 300 connects drier 20 by sampling pipe.
Four-way valve 30 has 304 4 the first valve port 301, the second valve port 302, third valve port 303, the 4th valve port valve ports.
First valve port 301 connects the gas vent of drier 20 by pipeline；Second valve port 302 connects mass spectral analysis by entrance hard tube
The gas access of instrument 40；Third valve port 303 connects the gas vent of mass spectrometer 40 by exporting hard tube；4th valve port 304
Emptying outlet is connected by pipeline.
When needing mass spectrometer 40 to carry out VOC component analyses to gas, the first valve port 301 of inside of four-way valve 30 and the
Two valve ports 302 are connected to, and third valve port 303 is connected to the 4th valve port 304, as shown in Figure 3.At this point, gas to be analyzed is inserted by head space
Needle penetrates injection dottle pin 200 and introduces in counterbore 1001 or the intercommunicating pore 1003 of headspace sampling device 10.Gas to be analyzed is in head space
Enter sampling pipe after counterbore 1001, intercommunicating pore 1003 and sampling interconnecting piece 1002 successively in sampling device 10.Gas to be analyzed
The sampled pipe of body enters drier 20, is discharged after being dehumidified in drier 20, then, the gas being discharged out of drier 20 into
Enter four-way valve 30.In four-way valve 30, the gas after drying passes through the first valve port 301, the second valve port 302 and entrance hard tube successively
Into mass spectrometer 40.
Dry gas becomes exhaust gas after VOC is analyzed in mass spectrometer 40 and is discharged.The exhaust gas of discharge is through exporting hard tube
Into four-way valve 30, it is discharged successively by emptying outlet after third valve port 303 and the 4th valve port 304 in four-way valve 30.
That is, being included the following steps using the method that this embodiment carries out headspace sampling analysis：
A, head space contact pin penetrates injection dottle pin, is analysed to gas and introduces headspace sampling device, gas to be analyzed passes through successively
It crosses counterbore, intercommunicating pore and sampling interconnecting piece and enters sampling pipe；
B, gas to be analyzed enters drier by sampling pipe, is discharged after drier dehumidifies；
C, the gas to be analyzed being discharged from drier enters mass spectrometer through four-way valve, by pipeline；
D, it is discharged after VOC component analyses into the gas of mass spectrometer；
E, the gas being discharged from mass spectrometer is discharged through four-way valve, by pipeline.
When not needing mass spectrometer 40 to gas progress VOC component analyses, 30 inside 301 He of the first valve port of four-way valve
4th valve port 304 is connected to, and the second valve port 302 is connected to third valve port 303, as shown in Figure 4.At this point, being introduced by head space contact pin
Gas directly gone out successively by emptying after headspace sampling device 10, drier 20, the first valve port 301 and the 4th valve port 304
Mouth discharge.And then form a closed circulation between the second valve port 302, mass spectrometer 40 and third valve port 303.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And it does not limit the embodiments.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among changes and variations that derived from are still in the scope of protection of the utility model.
Claims (9)
1. a kind of headspace sampling device, which is characterized in that including：
Main part is column structure, and one end sets counterbore, and the other end sets sealing hole, by even between the counterbore and the sealing hole
Through-hole penetrates through；The aperture of the counterbore and the aperture of the sealing hole are all higher than the aperture of the intercommunicating pore, the intercommunicating pore
Aperture is more than head space pin diameter；
Dottle pin is injected, is inserted into the counterbore, with counterbore sealing, tight fit；It can be penetrated by the head space contact pin；
Interconnecting piece is sampled, is tubular structure, one end connects sampling pipe with sealing hole sealing, tight fit, the other end.
2. headspace sampling device according to claim 1, which is characterized in that the sealing hole is equipped with inside tapered thread；
One end of the sampling interconnecting piece sets outer cone thread；The inside tapered thread is tightly connected with the outer cone thread.
3. headspace sampling device according to claim 1, which is characterized in that the outer wall of the main part is close to the sealing
The one end in hole, the length direction along the main part tighten platform equipped with two or more, are clamped for spanner.
4. headspace sampling device according to claim 1, which is characterized in that the outer wall of the main part is equipped with installation spiral shell
It is female.
5. headspace sampling device according to claim 1, which is characterized in that the main part is cylindric, using aluminium
Manufacture；The injection dottle pin is rubber material.
6. headspace sampling device according to claim 1, which is characterized in that the main part is equipped with one end of counterbore, edge
Extend radially outwardly an ear platform.
7. headspace sampling device according to claim 6, which is characterized in that it is described heavy that one end of the injection dottle pin is inserted into
In hole, the other end compresses the ear platform.
8. headspace sampling device according to claim 7, which is characterized in that further include：
Lid is made of aluminium, thickness 0.2mm-1mm, closely coats the injection dottle pin and the ear platform.
9. a kind of headspace sampling analysis system using any headspace sampling devices of claim 1-8, which is characterized in that
Including：
Pass sequentially through the headspace sampling device, drier, four-way valve and the mass spectrometer of pipeline connection；
Shell, for the headspace sampling device, the drier, the four-way valve and the mass spectrometer to be fixedly mounted.
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| CN201820398943.8U CN207909828U (en) | 2018-03-22 | 2018-03-22 | A kind of headspace sampling device and headspace sampling analysis system |
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| CN201820398943.8U CN207909828U (en) | 2018-03-22 | 2018-03-22 | A kind of headspace sampling device and headspace sampling analysis system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389773A (en) * | 2018-03-22 | 2018-08-10 | 北京雪迪龙科技股份有限公司 | A kind of headspace sampling device and headspace sampling analysis system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389773A (en) * | 2018-03-22 | 2018-08-10 | 北京雪迪龙科技股份有限公司 | A kind of headspace sampling device and headspace sampling analysis system and method |
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