CN205809019U - A kind of transmission line and application of gas chromatorgraphy/mass system - Google Patents
A kind of transmission line and application of gas chromatorgraphy/mass system Download PDFInfo
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- CN205809019U CN205809019U CN201620502670.8U CN201620502670U CN205809019U CN 205809019 U CN205809019 U CN 205809019U CN 201620502670 U CN201620502670 U CN 201620502670U CN 205809019 U CN205809019 U CN 205809019U
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- transmission line
- adpting flange
- main body
- heating mantle
- line main
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Abstract
The utility model discloses a kind of transmission line and application of gas chromatorgraphy/mass system, described transmission line is used for connecting chromatograph and mass spectrograph, including: transmission line main body, adpting flange, vacuum combined joint and standard specimen transmission channel；One end of described transmission line main body is connected with described mass spectrograph by described adpting flange, and the other end of described transmission line main body is connected with described chromatograph by described vacuum combined joint；Described standard specimen transmission channel is arranged in described adpting flange, and first opening of one end of described standard specimen transmission channel is positioned on the end face that described adpting flange is connected with described mass spectrograph, and the second opening of the other end is positioned on the circular arc outer wall of described adpting flange；Wherein, the end face of described adpting flange is perpendicular to the axis of described adpting flange, and described circular arc outer wall vertical is in the end face of described adpting flange.
Description
Technical field
This utility model belongs to instrument field, is specifically related to a kind of transmission line and application of gas chromatorgraphy/mass system.
Background technology
Mass spectrum (mass spectrometry, be abbreviated as MS) be utilize electric field and/or magnetic field by motion ion by its mass-to-charge ratio separate after, by measuring a kind of spectral method that the exact mass of ion determines the compound composition of ion, it is mainly used in the Structural Identification of compound, such as: the structural information such as the molecular weight of compound, elementary composition and functional group.The most effective to the detection of pure substance for the mass spectrograph of mass spectral analysis.For mixture, each component of mixture is generally needed through mass spectrograph, each component to be detected respectively after first separating again.Gas chromatography (gas chromatography, be abbreviated as GC) is a kind of widely used separation means.It is using noble gas as flowing phase, column chromatography based on the difference on two accelerated trip of the component in sample.Although each Component seperation in complex mixture can be opened by gas chromatography, but its qualitative ability is poor.
Gas chromatography-mass spectrography (GC-MS) is currently mainly used to realize the separation to complex mixture and detection.But, both instrumental working conditions are completely different, it is therefore desirable to by a special attachment means, two instruments are linked up.Along with mass spectrograph and the development of gas chromatograph so that the transmission line for conventional chromatography-mass spectroscopy instrument structurally cannot meet requirement.
Utility model content
Technical problem to be solved in the utility model is how to provide one structurally to meet transmission line associated with chromatograph and mass spectrograph.
For above technical problem, this utility model provides a kind of transmission line, is used for connecting chromatograph and mass spectrograph, including: transmission line main body, adpting flange, vacuum combined joint and standard specimen transmission channel；
One end of described transmission line main body is connected with described mass spectrograph by described adpting flange, and the other end of described transmission line main body is connected with described chromatograph by described vacuum combined joint；
Described standard specimen transmission channel is arranged in described adpting flange, and first opening of one end of described standard specimen transmission channel is positioned on the end face that described adpting flange is connected with described mass spectrograph, and the second opening of the other end is positioned on the circular arc outer wall of described adpting flange；
Wherein, the end face of described adpting flange is perpendicular to the axis of described adpting flange, and described circular arc outer wall vertical is in the end face of described adpting flange.
Preferably, also include heating mantle, be coated in the transmission line main body between described mass spectrograph and described chromatograph, to heat the gas of transmission in described transmission line main body.
Preferably, also include collet, be coated in described heating mantle, so that described heating mantle forms thermal isolation with extraneous.
Preferably, also include at least one temperature measuring equipment, be arranged in described heating mantle, for measuring the temperature in described heating mantle.
Preferably, also include at least one heater, be arranged in described heating mantle, be used for heating described heating mantle.
Preferably, also include plug nut, for when the second opening part of described standard specimen transmission channel does not inputs standard specimen gas, seal described second opening.
Preferably, also include flange switching bucket, be arranged in the transmission line main body between described adpting flange and described mass spectrometric ion source, to heat the gas of transmission in described transmission line main body.
Preferably, described collet includes that heat insulation inner sleeve and insulated sheath, described heat insulation inner sleeve are coated in described heating mantle, insulated sheath be coated on described heat insulation in put.
Preferably, described heat insulation inner sleeve is fiberglass pipe.
On the other hand, this utility model additionally provides a kind of application of gas chromatorgraphy/mass system, including above-described transmission line.
This utility model provide for chromatograph and the transmission line of mass spectrograph combined system, second opening of standard specimen transmission channel is arranged on the circular arc outer wall of adpting flange, compared with the structure directly leading out standard specimen transfer tube traditional end face from flange, the transmission line that this utility model provides saves the space shared by standard specimen transfer tube of extraction, compared to traditional transmission line, structure is simpler, and processing is more prone to, safeguarding convenient, air-tightness is more readily available guarantee.Meanwhile, the transmission line that this utility model provides is applicable to system associated with small-sized chromatograph and mass spectrograph, meets and need associated with chromatograph and mass spectrograph from structure.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 be one embodiment of this utility model provide for chromatograph and the structural representation of the transmission line of mass spectrograph combined system；
Fig. 2 is the structure three-dimensional schematic diagram of the transmission line of a kind of mode of heating that one embodiment of this utility model provides；
Fig. 3 is transmission line main body and the connected mode schematic diagram of adpting flange of one embodiment offer of this utility model；
Fig. 4 is transmission line main body and the generalized section of connecting flange structure in Fig. 3；
Fig. 5 is the schematic three dimensional views that the transmission line main body that one embodiment of this utility model provides is connected with mass spectrograph and chromatograph；
Fig. 6 is the structural representation of the heating mantle in the mode of heating in Fig. 2 that one embodiment of this utility model provides；
Fig. 7 is that the ceramic heating pipe that uses that one embodiment of this utility model provides carries out the structural representation of heat transfer line；
Fig. 8 is the ceramic heating pipe structural representation shown in Fig. 7；
Fig. 9 is the structural representation of temperature sensing device shown in Fig. 7；
Accompanying drawing illustrates: 10-transmission line main body, 20-adpting flange, the vacuum combined joint of 30-, 40-standard specimen transmission channel, 50-heating mantle, the heat insulation inner sleeve of 61-, 62-insulated sheath, 21-flange switching bucket, 51-heating rod, 52-thermometer hole, 53-bottoming hole, 54-screwed hole, 70-plug nut, 80-ceramic heating pipe, 81-ceramic heat tube body, 82-goes between, central through hole on 83-ceramic heating pipe, 90-temperature sensing device, 91-goes between bit-avoiding slot, 92-fixing hole, the central through hole of 93-temperature sensing device 90.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Fig. 1 be this utility model embodiment provide for chromatograph and the structural representation of the transmission line of mass spectrograph combined system, a kind of transmission line, see Fig. 1, this transmission line is used for connecting chromatograph and mass spectrograph, including: transmission line main body 10, adpting flange 20, vacuum combined joint 30 and standard specimen transmission channel 40；
One end of described transmission line main body 10 is connected with described mass spectrograph by described adpting flange 20, and the other end of described transmission line main body 10 is connected with described chromatograph by described vacuum combined joint 30；
Described standard specimen transmission channel 40 is arranged in described adpting flange 20, first opening of one end of described standard specimen transmission channel 40 is positioned on the end face that described adpting flange 20 is connected with described mass spectrograph, and the second opening of the other end is positioned on the circular arc outer wall of described adpting flange 20；
Wherein, the end face of described adpting flange 20 is perpendicular to the axis of described adpting flange 20, and described circular arc outer wall vertical is in the end face of described adpting flange.
Transmission line main body 10 is for by the gas transmission in chromatograph to mass spectrograph, and standard specimen transmission channel 40 is for being transferred to gaseous sample or the fluid sample saturated vapor of standard in mass spectrograph.The axis of adpting flange 20 is exactly its center axis, and transmission line main body 10 is hollow tubular structures.In FIG, the dead in line of the transmission line main body 10 of the axis of adpting flange 20 and hollow tubular structures.
The present embodiment provide for chromatograph and the transmission line of mass spectrograph combined system, second opening of standard specimen transmission channel is arranged on the circular arc outer wall of adpting flange, compared with the structure directly leading out standard specimen transfer tube traditional end face from flange, the transmission line that this utility model provides saves the space shared by standard specimen transfer tube of extraction, compared to traditional transmission line, structure is simpler, and processing is more prone to, safeguarding convenient, air-tightness is more readily available guarantee.Meanwhile, the transmission line that this utility model provides is applicable to system associated with small-sized chromatograph and mass spectrograph, meets and need associated with chromatograph and mass spectrograph from structure.
Further, this transmission line also includes heating mantle, is coated in the transmission line main body between described mass spectrograph and described chromatograph, to heat the gas of transmission in described transmission line main body.
In heating mantle heats transmission line main body, the gas of transmission, prevents gas condensates.
Further, also include collet, be coated in described heating mantle, so that described heating mantle forms thermal isolation with extraneous.
Collet plays insulation effect, prevents the waste of heat, simultaneously, it is to avoid the injury that the touching of heating mantle is brought by people.
Further, also include at least one temperature measuring equipment, be arranged in described heating mantle, for measuring the temperature in described heating mantle.
Temperature in heating mantle is monitored by temperature measuring equipment.
Further, also include at least one heater, be arranged in described heating mantle, be used for heating described heating mantle.
For can directly convert electrical energy into the heating mantle of heat energy, only for can not directly convert electrical energy into the heating mantle of heat energy, also need to need, by other heaters, such as heating rod, by the way of conduction of heat, to heat whole heating mantle by heating sleeved electric.
Further, also include plug nut, for when the second opening part of described standard specimen transmission channel does not inputs standard specimen, seal described second opening.
Ensure that when not connecing standard specimen gas or fluid sample saturated vapor, the air-tightness of whole system.
Further, also include flange switching bucket, be arranged in the transmission line main body between described adpting flange and described mass spectrometric ion source, to heat the gas of transmission in described transmission line main body.
Flange switching bucket is positioned at mass spectrograph, owing to transmission line main body is after adpting flange enters into mass spectrograph, need to be connected with the ion source in mass spectrograph, in order to ensure in adpting flange to this segment distance ionogenic, there is the device that gas in transmission line main body is heated, it is provided with flange switching bucket, all can heat being guaranteed at each section of interior gas of transmission line main body, reach more preferable laser propagation effect.
Further, described collet includes that heat insulation inner sleeve and insulated sheath, described heat insulation inner sleeve are coated in described heating mantle, insulated sheath be coated on described heat insulation in put.
The setting of double thermal insulation set serves more preferable heat insulation effect.According to the difference of two collet local environments, the thermostability of each collet is the most different, and the thermostability of heat insulation inner sleeve is better than insulated sheath,
Further, described heat insulation inner sleeve is fiberglass pipe.
Fiberglass pipe has good thermostability.
On the other hand, a kind of application of gas chromatorgraphy/mass system is present embodiments provided, including above-described transmission line.
Mass spectrograph and chromatograph are attached by application of gas chromatorgraphy/mass system exactly, utilize the system that the gaseous sample separated through chromatograph is detected by mass spectrograph.Using chromatograph and the mass spectrograph of the transmission line connection of the present embodiment offer, owing to the structure of transmission line is simpler, processing is more prone to, and safeguards convenient, and therefore the air-tightness of application of gas chromatorgraphy/mass system is more readily available guarantee, has more preferable laser propagation effect.On the other hand, this transmission line can manufacture according to chromatograph and mass spectrometric dimensional requirement, it is possible to meets the chromatograph of miniaturization and mass spectrometric demand.
As one more specifically embodiment, see the transmission line shown in Fig. 2 to Fig. 6.One end of transmission line main body 10 is connected with described mass spectrograph by described adpting flange 20, and the other end of described transmission line main body 10 is connected with described chromatograph by described vacuum combined joint 30；
Described standard specimen transmission channel 40 is arranged in described adpting flange 20, and heating mantle 50 is coated in the transmission line main body 10 between described mass spectrograph and described chromatograph, to heat the gas of transmission in described transmission line main body 10.Heat insulation inner sleeve 61 is coated in described heating mantle 50, and insulated sheath 62 is coated in described heat insulation inner sleeve 61.So that described heating mantle forms thermal isolation with extraneous.Temperature measuring equipment, is arranged in the thermometer hole 52 of described heating mantle 50, for measuring the temperature in described heating mantle.Heating rod 51, is arranged in the bottoming hole 53 of described heating mantle 50, is used for heating described heating mantle.Also include plug nut 70, for when the second opening part of described standard specimen transmission channel does not inputs standard specimen gas, seal described second opening.Flange switching bucket 21, is arranged in the transmission line main body 10 between described adpting flange and described mass spectrometric ion source, to heat the gas of transmission in described transmission line main body 10.
Transmission line main body 10 typically uses resistant to elevated temperatures material to make, and such as, uses 304 rustless steels, 316 rustless steels or titanium alloy etc..The size of transmission line main body 10 can according to the size of connected chromatograph and mass spectrometric interface concrete depending on, for example with external diameter 3.175mm, internal diameter 2.2mm (1/8 " external diameter), the present embodiment does not limits.
For another example, heat insulation inner sleeve 61 and insulated sheath 62 are to have the bi-material of different heat conductivity, and the heat conductivity of heat insulation inner sleeve is less than the heat conductivity of insulated sheath, and this setup is to reach more preferable effect of heat insulation.Such as, it is that glass fibre is heat insulation that heat insulation inner sleeve 61 uses, and insulated sheath 62 uses rubber and plastic heat insulation.
By flange switching bucket 21, transmission line main body 10 and adpting flange 20 are connected.The mode all using vacuum to seal welding (such as, argon arc welding, Laser Welding and electron-bombardment welding) between flange switching bucket 21 and adpting flange 20 and between flange switching bucket 21 and transmission line main body 10 connects, to ensure vacuum-tightness.Adpting flange 20 is the ultrahigh vacuum flange of metal sealing, for example with CF edge seal flange (CF16 specification, external diameter is 34mm).
Fig. 4 is transmission line main body 10 and the profile of adpting flange 20 in Fig. 3, it can be seen that standard specimen transmission channel 40 is arranged on adpting flange 20.Connecting for convenience, an opening of usual standard specimen transmission channel 40 is arranged on the circular arc outer wall of adpting flange 20.Standard specimen transmission channel 20 can use plug nut 70 to seal, and when need not input sample in mass spectrograph, uses plug nut 70 to seal standard specimen transmission channel, to ensure the air-tightness at adpting flange 20.
Vacuum combined joint 30 is to be tightly connected to realize the vacuum of transmission line main body 10 and chromatographic column, and such as, vacuum combined joint 30 is vacuum reducer union.
The structure of the heating mantle 50 in the transmission line provided in the present embodiment is as shown in Figure 6.This heating mantle 50 uses the mode of heat conduction to be that transmission line main body 10 heats, and the material that heating mantle 50 uses heat conductivility good is made, and such as, heating mantle 50 uses red copper to process.At least one thermometer hole 52 and at least one bottoming hole 53 it is provided with on the tube wall of heating mantle 50.It is provided with the device measuring temperature, such as thermocouple in thermometer hole 52, is provided with heating rod 51 in bottoming hole 53, as shown in Figure 2.The screwed hole 54 of fixing thermocouple it is additionally provided with in heating mantle 50, when using thermocouple to measure the temperature in heating mantle 50, thermocouple can be fixed, simultaneously, the setting of screwed hole 54 also serves locking action to heating mantle 50, adds the stability during whole transmission line uses.
Bottoming hole 53 is uniformly arranged on the tube wall of heating mantle 50, as shown in Figure 6, so that the gas in described transmission line main body 10 is uniformly heated by heating mantle 50.Further, thermometer hole 52 and bottoming hole 53 can be arranged alternately, to increase the uniformity of temperature and to improve the efficiency of heating surface.
Additionally, for the excellent thermal conduction effect ensureing heating mantle 50, the size of the central through hole of heating mantle 50 must ensure suitable tolerance fit with transmission line main body 10 so that transmission line main body 10 can be easier in the central through hole of insertion heating mantle, and contacts good.The size of bottoming hole 53 must have suitable tolerance fit with the size of heating rod 51.Thermometer hole 52 is used for placing column type thermocouple (such as PT100).The size of thermometer hole 52 also should have suitable tolerance fit with thermocouple.
Further, heating mantle 50 can use the material of ceramic heat to make, and in this case, just need not heating rod, simplifies the structure of heating mantle 50, facilitate making.As shown in Figure 7 to 9, it is the structure of another kind of transmission line that provides of the present embodiment.
As it is shown in fig. 7, the present embodiment uses ceramic heating pipe 80 and temperature sensing device 90 realize the heating of gas in transmission line main body 10 and monitoring temperature.
Temperature sensing device 90 is arranged on one end of ceramic heating pipe 80, the temperature of the gas in measurement transmission line main body 10.
As shown in Figure 8, including ceramic heat tube body 81 and the lead-in wire 82 that contacts with this ceramic heat tube body 81, lead-in wire 82 is for powering to ceramic heat tube body 81 for the structure of ceramic heating pipe 80.
Temperature sensing device 90 is to have the tubular structure of same inner diameter and external diameter with ceramic heating pipe 80, as it is shown in figure 9, be provided with lead-in wire bit-avoiding slot 91 and fixing hole 92 on temperature sensing device 90, fixing hole 92 is screwed hole；
Wherein, lead-in wire bit-avoiding slot 91 is for matching with the lead-in wire 82 being arranged on ceramic heat tube body 81；
Fixing hole 92 is used for fixing thermocouple, and locking temperature sensing device 90.
The transmission line that the present embodiment provides, ceramic heating pipe 80 heats directly to transmission line main body 10.Temperature sensing device 90, while realizing temperature sensing, also functions to limit the effect of ceramic heating pipe 80.
Ceramic heat tube body 80 is made matrix by good pottery, with high-quality heating wire string around forming, its electric conversion efficiency is high, quick heating, thermal inertia are little, high temperature resistant, corrosion-resistant, thermochemical property good stability, service life is long, dielectric strength is high, pollution-free, can save energy about 30% compared with other electrical heating elements.The transmission line main body 10 that the size of the central through hole 83 on ceramic heating pipe 80 must and be assembled therewith ensures suitable tolerance fit so that transmission line main body 10 can be easier to insert in ceramic heating pipe 80, and contacts good.
The material of temperature sensing device 90 is the red copper or aluminum that heat conductivility is good.The size of the central through hole 93 of temperature sensing device 90 must ensure suitable tolerance fit with transmission line main body 10 so that transmission line main body 10 can be easier to insert in temperature sensing device 90, and contacts good.Lead-in wire bit-avoiding slot 91 is the extraction of the lead-in wire 82 on ceramic heat tube body 81 for convenience.
Owing to the temperature of transmission line main body 10 and ceramic heating pipe 80 is the highest, (maximum temperature can reach more than 300 DEG C).Therefore, in order to be incubated and prevent touching from scalding, heat insulation inner sleeve 61 and insulated sheath 62 (as shown in Figure 2) it are inserted in the periphery of ceramic heating pipe 80 and temperature sensing device 90.Heat insulation inner sleeve 61 uses fiberglass pipe, because its heat resistance is good, and the most well adiabator.In the outside of heat insulation inner sleeve 61, then it is the most heat insulation to put insulated sheath 62 so that the temperature outside of whole transmission line can reach less than 60 DEG C.
In the structure of two kinds of mode of heatings in the present embodiment, second opening of standard specimen transmission channel is arranged on the circular arc outer wall of adpting flange, compared with the structure directly leading out standard specimen transfer tube traditional end face from flange, the transmission line that this utility model provides saves the space shared by standard specimen transfer tube of extraction, compared to traditional transmission line, structure is simpler, and processing is more prone to, safeguarding convenient, air-tightness is more prone to realize.Meanwhile, the transmission line that this utility model provides is applicable to system associated with small-sized chromatograph and mass spectrograph, meets and need associated with chromatograph and mass spectrograph from structure.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (10)
1. a transmission line, is used for connecting chromatograph and mass spectrograph, it is characterised in that including:
Transmission line main body, adpting flange, vacuum combined joint and standard specimen transmission channel；
One end of described transmission line main body is connected with described mass spectrograph by described adpting flange, institute
The other end stating transmission line main body is connected with described chromatograph by described vacuum combined joint；
Described standard specimen transmission channel is arranged in described adpting flange, described standard specimen transmission channel
First opening of one end is positioned on the end face that described adpting flange is connected with described mass spectrograph, another
Second opening of end is positioned on the circular arc outer wall of described adpting flange；
Wherein, the end face of described adpting flange is perpendicular to the axis of described adpting flange, described circle
Arc outer wall vertical is in the end face of described adpting flange.
Transmission line the most according to claim 1, it is characterised in that also include heating mantle,
It is coated in the transmission line main body between described mass spectrograph and described chromatograph, to heat described biography
The gas of transmission in defeated line main body.
Transmission line the most according to claim 2, it is characterised in that also include collet,
It is coated in described heating mantle, so that described heating mantle forms thermal isolation with extraneous.
Transmission line the most according to claim 2, it is characterised in that also include at least one
Individual temperature measuring equipment, is arranged in described heating mantle, for measuring the temperature in described heating mantle.
Transmission line the most according to claim 2, it is characterised in that also include at least one
Individual heater, is arranged in described heating mantle, is used for heating described heating mantle.
Transmission line the most according to claim 1, it is characterised in that also include plug spiral shell
Cap, for when the second opening part of described standard specimen transmission channel does not inputs standard specimen gas, seals
Described second opening.
Transmission line the most according to claim 1, it is characterised in that also include that flange turns
Connect bucket, be arranged on the transmission line main body between described adpting flange and described mass spectrometric ion source
On, to heat the gas of transmission in described transmission line main body.
Transmission line the most according to claim 3, it is characterised in that described collet bag
Including heat insulation inner sleeve and insulated sheath, described heat insulation inner sleeve is coated in described heating mantle, heat insulation outside
Set be coated on described heat insulation in put.
Transmission line the most according to claim 8, it is characterised in that described heat insulation inner sleeve
For fiberglass pipe.
10. an application of gas chromatorgraphy/mass system, it is characterised in that include any one of claim 1-9
Described transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620502670.8U CN205809019U (en) | 2016-05-27 | 2016-05-27 | A kind of transmission line and application of gas chromatorgraphy/mass system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620502670.8U CN205809019U (en) | 2016-05-27 | 2016-05-27 | A kind of transmission line and application of gas chromatorgraphy/mass system |
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| CN205809019U true CN205809019U (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866306A (en) * | 2016-05-27 | 2016-08-17 | 中国计量科学研究院 | Transmission line and chromatography-mass spectrometry system |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866306A (en) * | 2016-05-27 | 2016-08-17 | 中国计量科学研究院 | Transmission line and chromatography-mass spectrometry system |
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