CN204315511U - For electrode retaining collar, transference tube, the ionic migration spectrometer of ionic migration spectrometer - Google Patents
For electrode retaining collar, transference tube, the ionic migration spectrometer of ionic migration spectrometer Download PDFInfo
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- CN204315511U CN204315511U CN201420867685.5U CN201420867685U CN204315511U CN 204315511 U CN204315511 U CN 204315511U CN 201420867685 U CN201420867685 U CN 201420867685U CN 204315511 U CN204315511 U CN 204315511U
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Abstract
The utility model discloses a kind of electrode retaining collar for ionic migration spectrometer, transference tube, ionic migration spectrometer, wherein, the upper outside edge thickness of described electrode retaining collar axial direction is greater than interior edge thickness.The utility model is changed into edge thickness on axial direction be less than outer edge thickness by electrode retaining collar structure is equaled outer edge thickness by edge thickness on axial direction, significantly improves migration tube internal electric field uniformity.The utility model, by the electrode retaining collar structure of the approximately interior edge thickness of the upper outside edge thickness of axial direction, expands migration tube inner ion graceful migration region.What the field uniformity equaling the transference tube that outer edge thickness electrode retaining collar form by edge thickness on axial direction was obviously worse than same thickness outer rim is less than by edge thickness interior on axial direction the transference tube that outer edge thickness electrode retaining collar forms.
Description
Technical field
The utility model relates to a kind of electrode retaining collar for ionic migration spectrometer, transference tube, ionic migration spectrometer, belongs to material detection technique field.
Background technology
Ion mobility spectrometry is the species analysis detection technique grown up at the beginning of the 1970's.The general principle that it adopts is the ion generated under atmospheric conditions, under specific Field signature, drift is started through identical distance from identical starting point, different ions can need the different time because having different mobilities, and measuring this time can carry out qualitative monitoring to material.It is high that Ion mobility spectrometry has detection sensitivity, and detection speed is fast, and can be implemented in line fast detecting, the advantages such as testing cost is low, are more and more subject to people's attention in recent years.The current application of ion mobility spectrometry is a lot, the monitoring of such as explosive, and drugs are checked, and the fields such as the detection of biochemical war agent, are also more and more applied to the fields such as organic pollution detection in recent years.
As everyone knows, ionic migration spectrometer comprises migration tube usually, and its intermediate ion causes migration under the electric field influence of constant applying.Transference tube is the core component of ionic migration spectrometer, and the motion of charged ion in migration tube is mainly subject to the impact of migration tube electric field.The uniformity improving migration tube electric field contributes to the sensitivity improving ionic migration spectrometer.The various structures of migration tube has been proposed.As shown in Figure 1, migration tube can comprise the electrode retaining collar 1 that a series of length axially spaced-apart along spectrometer distributes, and keeps constant potential difference to produce axial steady electric field between wherein adjacent annular electrode.The electric field of migration tube migration area is formed by applying increasing or decreasing electromotive force by equally distributed electrode retaining collar.As shown in Figure 1 to Figure 3, existing migration tube generally adopts the structure that thin metal electric polar ring 1 and dead ring 2 interval are assembled.Research finds that the thickness of electrode retaining collar 1 is less as shown in Figure 4, and migration tube electric field strength uniformity is better.But because electrode retaining collar 1 is thinner, process and assemble difficulty is larger, and expense is higher, have a strong impact on the development of ionic migration spectrometer.
Utility model content
The technical problems to be solved in the utility model is: improve transference tube internal electric field uniformity, expands migration tube inner ion graceful migration region and solves the problem that in prior art, thin electrodes ring process and assemble difficulty is large.
For achieving the above object, the utility model provides a kind of electrode retaining collar for ionic migration spectrometer, transference tube, ionic migration spectrometer.
On the one hand, the utility model provides a kind of electrode retaining collar for ionic migration spectrometer, and the upper outside edge thickness of described electrode retaining collar axial direction is greater than interior edge thickness.
Wherein more preferably, described electrode retaining collar cross section is triangular in shape.
Wherein more preferably, described electrode retaining collar cross section is wedge shape.
Wherein more preferably, two limits be connected with the limit at described electrode retaining collar outer rim place are two minor arcs be connected.
Wherein more preferably, the angle between limit, outer rim place, described electrode retaining collar cross section and adjacent two limits is 90 degree, protruding to direction, inner edge with two other end points on adjacent two limits.
Wherein more preferably, the limit, place, inner edge in described electrode retaining collar cross section is straight line.
Wherein more preferably, described projection is semicircle, triangle, trapezoidal.
On the other hand, the utility model also provides a kind of transference tube, comprises multiple above-mentioned electrode retaining collar.
Wherein more preferably, described electrode retaining collar is reduced by edge thickness in the upper electrode rings of direction gradually at ion.
Again on the one hand, the utility model also provides a kind of ionic migration spectrometer, comprises above-mentioned transference tube.
The electrode retaining collar for ionic migration spectrometer that the utility model provides, transference tube, ionic migration spectrometer, change into edge thickness on axial direction be less than outer edge thickness by electrode retaining collar structure is equaled outer edge thickness by edge thickness on axial direction, significantly improve migration tube internal electric field uniformity.The utility model, by the electrode retaining collar structure of the approximately interior edge thickness of the upper outside edge thickness of axial direction, expands migration tube inner ion graceful migration region.What the field uniformity equaling the transference tube that outer edge thickness electrode retaining collar form by edge thickness on axial direction was obviously worse than same thickness outer rim is less than by edge thickness interior on axial direction the transference tube that outer edge thickness electrode retaining collar forms.
Accompanying drawing explanation
Fig. 1 is the migration tube schematic diagram in prior art after electrode retaining collar assembling;
Fig. 2 is electrode retaining collar schematic diagram in prior art;
Fig. 3 is electrode retaining collar schematic cross-section in prior art;
Fig. 4 is the electrode retaining collar electric field strength radial component curve of cyclical fluctuations schematic diagram that the inside and outside edge thickness of different-thickness in prior art is equal;
Fig. 5 is the utility model electrode retaining collar schematic diagram;
Fig. 6 is the utility model electrode retaining collar schematic cross-section;
Fig. 7 is the electrode retaining collar schematic cross-section of the different execution mode of the utility model;
Fig. 8 is the electrode retaining collar electric field strength radial component curve of cyclical fluctuations schematic diagram after the chamfering of the utility model inner edge;
Fig. 9 is the transference tube schematic diagram of the electrode retaining collar assembling after the chamfering of the utility model inner edge.
Figure 10 is that electrode retaining collar electric field strength radial component after the electrode retaining collar and the utility model inner edge chamfering that in prior art, inside and outside edge thickness is equal fluctuates correlation curve schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 2 and Figure 3, because electrode retaining collar in prior art 1 equals interior edge thickness at the upper upper outside edge thickness of axial direction (x direction), in order to ensure transference tube electric field strength uniformity, what need electrode retaining collar 1 to process is very thin, electrode retaining collar 1 is thinner, and process and assemble difficulty is larger.In order to reduce process and assemble difficulty, need the thickness suitably increasing electrode retaining collar 1.The utility model should while reduction process unit difficulty, also to ensure transference tube electric field strength uniformity, the utility model provides a kind of electrode retaining collar for ionic migration spectrometer for this reason, as shown in Figure 5-Figure 7, this electrode retaining collar axial direction (x direction) upper outside edge thickness is greater than interior edge thickness.The electrode retaining collar for ionic migration spectrometer provided the utility model below launches to describe in detail.
As shown in Figure 7, as preferred version of the present utility model, the cross section of the electrode retaining collar 1 that the utility model provides (in Fig. 7 first row, the first figure, the second figure) triangular in shape.As shown in Figure 5, Figure 6, the cross section of electrode retaining collar 1 also can be wedge shape.As shown in Figure 7, to be two limits be preferably connected with the limit at electrode retaining collar 1 outer rim place in the scheme of wedge shape in the cross section of electrode retaining collar 1 be two minor arcs be connected (in Fig. 7 first row, the 4th figure, the 5th figure).As shown in Figure 7, the angle between limit, outer rim place, electrode retaining collar 1 cross section and adjacent two limits is 90 degree, with two other end points on adjacent two limits to direction, inner edge projection (in Fig. 7, second row, the 3rd is arranged).The limit, place, inner edge in electrode retaining collar 1 cross section can be straight line (in Fig. 7, second row second figure, the 3rd ranked third figure, the 4th figure).Projection can be semicircle (in Fig. 7, the 3rd ranked first figure, the 5th figure), triangle (in Fig. 7 second row first figure, the 5th figure), trapezoidal (in Fig. 7 second row second figure).Should be appreciated that the utility model is not limited only to this, except the scheme enumerated in Fig. 7, as long as other electrode retaining collar 1 is greater than interior edge thickness at axial direction (x direction) upper outside edge thickness all can realize the utility model.
As shown in Figure 5-Figure 7, the embodiment of the electrode retaining collar 1 that the utility model provides, be not limited to the preferred version cited by the utility model execution mode, do any direction chamfering in electrode retaining collar 1 inner edge, make electrode retaining collar 1 in the axial direction outer edge thickness be greater than interior edge thickness and all can realize the utility model.As shown in Figure 7, the inner edge in electrode retaining collar 1 cross section is scheme the best of wedge angle (as first row first figure, the second figure, the 3rd figure, the 4th figure, second ranked fourth figure, and the 3rd ranked second figure).Fillet scheme to improve in field uniformity comparatively wedge angle scheme slightly poor (as first ranked fifth figure, the 3rd ranked first figure, the 3rd figure, the 5th figure).As shown in Figure 8, the utility model is when electrode retaining collar is 2mm at axial direction (x direction) upper outside edge thickness, chamfering 70 degree and 45 degree are adopted to compare with the electrode retaining collar of not chamfering, the migration tube clearly assembled by the electrode retaining collar after internal diameter chamfering, the fluctuation of same position electric field strength radial component obviously reduces, and illustrates that field uniformity improves.Chamfering is larger, and electric field strength uniformity effects is better.
As shown in Figure 9, in order to embody the superiority of the electrode retaining collar that the utility model provides further, the utility model also provides a kind of transference tube applying above-mentioned electrode retaining collar, and this comprises multiple above-mentioned electrode retaining collar.In order to guarantee the uniformity of the electric field of transference tube further, preferred version electrode retaining collar is reduced by edge thickness in the upper electrode rings of direction gradually at ion.
Under interior edge thickness equals the condition of outer edge thickness in the axial direction, the different ions migration tube of the electrode retaining collar composition of different-thickness, measure (such as near electrode retaining collar inner edge place at transference tube, electrode retaining collar radius is 10cm, needs to measure at ionization electrode ring central point 8cm place) obtain transference tube internal electric field field strength distribution.As shown in Figure 4, electrode retaining collar thickness is thinner, electric field more even of same position (ionization electrode ring central point 8cm place) in transference tube.The transference tube field uniformity of different-thickness electrode retaining collar composition is arranged as 0.5mm > 1mm > 2mm as seen from the figure.
In the axial direction under equal outer rim thickness condition, the different ions migration tube be made up of the electrode retaining collar of different interior edge thickness, measure (such as near electrode retaining collar inner edge place at transference tube, electrode retaining collar radius is 10cm, need to measure at ionization electrode ring central point 8cm place) obtain transference tube internal electric field field strength distribution, as shown in Figure 8, the utility model is when electrode retaining collar is 2mm at axial direction (x direction) upper outside edge thickness, electrode inner edge chamfering is larger, electric field more even of same position (ionization electrode ring central point 8cm place) in transference tube.The transference tube field uniformity of different chamfering is arranged as 70 ° >45 ° > not chamfering.Adopt chamfering 70 degree and 45 degree to compare with the electrode retaining collar of not chamfering as seen from the figure, clearly by the migration tube of the electrode retaining collar assembling after internal diameter chamfering, same position electric field strength radial component fluctuates obvious reduction, illustrates that field uniformity improves.Chamfering is larger, and electric field strength uniformity effects is better.
Under the different outer rim thickness condition of axial direction, the different ions migration tube be made up of Different electrodes ring, measure (such as near electrode retaining collar inner edge place at transference tube, electrode retaining collar radius is 10cm, need to measure at ionization electrode ring central point 8cm place) obtain transference tube internal electric field field strength distribution, as shown in Figure 10, inside and outside edge thickness is the migration tube electric field strength radial component difference of the electrode retaining collar composition of 0.5mm is 1 × 10
4left and right; Outer edge thickness 2mm, the migration tube electric field strength radial component difference of inner edge chamfering 70 ° of electrode retaining collar compositions is 3 × 10
3left and right.The field uniformity of the transference tube of the electrode retaining collar composition of outer edge thickness 2mm, inner edge chamfering 70 ° is better than the migration tube that inside and outside edge thickness is the electrode retaining collar composition of 0.5mm as seen from the figure; The migration tube that the comparatively inside and outside edge thickness in migration tube inner ion graceful migration region of the electrode retaining collar composition of outer edge thickness 2mm, inner edge chamfering 70 ° is the electrode retaining collar composition of 0.5mm also expands to some extent.
In order to embody the superiority of the transference tube that the utility model provides further, the utility model also provides a kind of ionic migration spectrometer applying above-mentioned transference tube, and this ionic migration spectrometer comprises transference tube described above.
In sum, the electrode retaining collar for ionic migration spectrometer that this law utility model provides, transference tube, ionic migration spectrometer, change into edge thickness on axial direction be less than outer edge thickness by electrode retaining collar structure is equaled outer edge thickness by edge thickness on axial direction, significantly improve migration tube internal electric field uniformity.The utility model, by the electrode retaining collar structure of the approximately interior edge thickness of the upper outside edge thickness of axial direction, expands migration tube inner ion graceful migration region.What the field uniformity equaling the transference tube that outer edge thickness electrode retaining collar form by edge thickness on axial direction was obviously worse than same thickness outer rim is less than by edge thickness interior on axial direction the transference tube that outer edge thickness electrode retaining collar forms.
Above execution mode is only for illustration of the utility model; and be not limitation of the utility model; the those of ordinary skill of relevant technical field; when not departing from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (10)
1. for an electrode retaining collar for ionic migration spectrometer, it is characterized in that, the upper outside edge thickness of described electrode retaining collar axial direction is greater than interior edge thickness.
2. electrode retaining collar as claimed in claim 1, it is characterized in that, described electrode retaining collar cross section is triangular in shape.
3. electrode retaining collar as claimed in claim 1, it is characterized in that, described electrode retaining collar cross section is wedge shape.
4. electrode retaining collar as claimed in claim 3, it is characterized in that, two limits be connected with the limit at described electrode retaining collar outer rim place are two minor arcs be connected.
5. electrode retaining collar as claimed in claim 1, it is characterized in that, the angle between limit, outer rim place, described electrode retaining collar cross section and adjacent two limits is 90 degree, protruding to direction, inner edge with adjacent two two other end points of limit.
6. electrode retaining collar as claimed in claim 5, it is characterized in that, the limit, place, inner edge in described electrode retaining collar cross section is straight line.
7. electrode retaining collar as claimed in claim 5, is characterized in that, described projection is semicircle, triangle, trapezoidal.
8. a transference tube, is characterized in that, comprises the electrode retaining collar described in multiple claim 1-7 any one.
9. transference tube as claimed in claim 8, it is characterized in that, described electrode retaining collar is reduced by edge thickness in the upper electrode rings of direction gradually at ion.
10. an ionic migration spectrometer, is characterized in that, comprises transference tube as claimed in claim 8 or 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867685.5U CN204315511U (en) | 2014-12-31 | 2014-12-31 | For electrode retaining collar, transference tube, the ionic migration spectrometer of ionic migration spectrometer |
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| CN201420867685.5U CN204315511U (en) | 2014-12-31 | 2014-12-31 | For electrode retaining collar, transference tube, the ionic migration spectrometer of ionic migration spectrometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576286A (en) * | 2014-12-31 | 2015-04-29 | 同方威视技术股份有限公司 | Electrode rings for ion migration spectrometer, iron migration tube and iron migration spectrometer |
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- 2014-12-31 CN CN201420867685.5U patent/CN204315511U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576286A (en) * | 2014-12-31 | 2015-04-29 | 同方威视技术股份有限公司 | Electrode rings for ion migration spectrometer, iron migration tube and iron migration spectrometer |
| WO2016107437A1 (en) * | 2014-12-31 | 2016-07-07 | 同方威视技术股份有限公司 | Electrode ring used for ion mobility spectrometer, ion migration tube and ion mobility spectrometer |
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