CN219533043U - GC-MS sample transmission device - Google Patents
GC-MS sample transmission device Download PDFInfo
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- CN219533043U CN219533043U CN202223334189.7U CN202223334189U CN219533043U CN 219533043 U CN219533043 U CN 219533043U CN 202223334189 U CN202223334189 U CN 202223334189U CN 219533043 U CN219533043 U CN 219533043U
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- transmission
- sample
- transmission line
- ring sealing
- flange
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Abstract
The utility model discloses a GC-MS sample transmission device, which comprises a transmission line, wherein a transmission flange is arranged on the transmission line, a metal ring sealing groove and a rubber ring sealing groove are arranged on the transmission flange, and the metal ring sealing groove and the rubber ring sealing groove on the transmission flange are connected with a cavity of a mass spectrometer through a metal ring sealing ring and a rubber ring sealing ring; the transmission line is internally provided with a sample transmission pipeline, one end of the sample transmission pipeline is connected with a chromatographic column in the gas chromatograph through a chromatographic interface, and the other end of the sample transmission pipeline is connected with an ion source sample inlet in the mass spectrometer. The utility model improves the sealing performance by integrally processing the transmission line and the transmission flange; the metal ring sealing groove and the rubber ring sealing groove are integrated on the transmission flange, so that the two sealing rings can be replaced conveniently; the temperature and voltage interference between the mass spectrometer and the transmission device is prevented by using the insulating joint, and the gas path connection between a pipeline in the insulating joint and the ion source sample inlet is ensured by using the spring; the temperature control is realized through a temperature control device.
Description
Technical Field
The utility model relates to a sample transmission device, belongs to the technical field of matching equipment of mass spectrometer, and particularly relates to a GC-MS sample transmission device.
Background
The mass spectrum has a powerful analysis function, is commonly used for structural identification of pure matters, has a very excellent separation effect by gas chromatography, and is very suitable for matching with the mass spectrum. The gas chromatograph-mass spectrometer (GC-MS) has high sensitivity and accuracy and is an indispensable tool in the analysis field. However, the operating environments of the two instruments are quite different, and the mass spectrometer needs to operate in a high vacuum environment, whereas the outlet pressure of the gas chromatography column is typically atmospheric pressure, so that a sample transfer device is required to connect the two instruments.
The mass spectrum must work under vacuum environment, so the joint of the sample transmission device and the mass spectrum needs to be sealed, the flange connection is a common connection form in a gas chromatography-mass spectrometer instrument, the flange connection is generally sealed by adopting a gasket, and the gasket is deformed by tightening a screw to fill the contact surface, so that the sealing purpose is achieved. The gasket generally comprises a rubber gasket and a metal gasket, wherein the rubber gasket has good flexibility and corrosion resistance and can be reused, and the metal gasket has good tightness and temperature resistance and no pollution.
Existing GC-MS typically use one of rubber gaskets or metal gaskets to seal the transfer flange, but this has certain technical drawbacks.
In the debugging process of instrument, probably need to carry out dismouting to transmission device, the elasticity of metal gasket is relatively poor, needs great power just can guarantee sealedly during the installation to hardly carry out reuse, and rubber gasket dismouting easily, and the cost is lower, but repetitious usage, consequently select rubber gasket to seal the effect better. However, when the high boiling point gas exists in the sample flowing out of the chromatographic column, the transmission device needs to be heated to ensure the transmission efficiency of the sample, the temperature resistance of the rubber gasket is poor, the rubber gasket is decomposed at high temperature, the sealing effect can be affected, and the produced substances can interfere the detection result of the instrument, so that the effect of selecting the metal gasket is better.
Because the environments for the two gaskets are different, the two gaskets are often required to be replaced in the use process, however, the existing transmission flange is often only provided with a sealing groove of one gasket, so that the whole transmission device is required to be replaced when the gaskets are replaced, the operation steps are complicated, and the maintenance efficiency is affected.
Disclosure of Invention
The utility model aims to provide a GC-MS sample transmission device which can be compatible with different sealing modes, and a metal ring sealing groove and a rubber ring sealing groove are simultaneously arranged on a transmission flange to realize the compatibility of the two sealing modes, and the insulation of voltage and temperature is realized on the basis of ensuring the gas circuit connection between two instruments so as to meet the GC-MS sample injection requirements under different environments.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the GC-MS sample transmission device comprises a transmission line, wherein a transmission flange is arranged on the transmission line, a metal ring sealing groove and a rubber ring sealing groove are arranged on the transmission flange, and the metal ring sealing groove and the rubber ring sealing groove on the transmission flange are connected with a cavity of a mass spectrometer through the metal ring sealing groove and the rubber ring sealing groove; the transmission line is internally provided with a sample transmission pipeline, one end of the sample transmission pipeline is connected with a chromatographic column in the gas chromatograph through a chromatographic interface, and the other end of the sample transmission pipeline is connected with an ion source sample inlet in the mass spectrometer.
Preferably, the transmission line and the transmission flange are integrally formed.
A GC-MS sample transmission apparatus according to any one of the preceding claims wherein one side of the transmission flange is connected to the mass spectrometer cavity and the other side of the transmission flange is connected to a transmission line housing which is sleeved over the transmission line.
Preferably, an insulation layer is arranged between the transmission line shell and the transmission line.
Preferably, a temperature control device is arranged in the heat preservation layer and is connected with a control device arranged outside the transmission line shell through a connecting line.
Preferably, an insulating joint is arranged in the cavity of the mass spectrometer, one end of the insulating joint is embedded at one end of the transmission line and connected with the sample transmission pipeline, and the other end of the insulating joint is connected with an ion source sample inlet in the mass spectrometer.
Preferably, the ion source sample inlet, the insulating joint, the sample transmission pipeline, the chromatographic interface and the chromatographic column are positioned on the same axis.
Preferably, the insulating connector is embedded at one end of the transmission line through a spring.
Preferably, the middle section of the insulating joint is provided with a limiting groove, the end part of the transmission line is provided with a limiting hole, and the limiting hole at the end part of the transmission line corresponds to the limiting groove in the middle section of the insulating joint.
Preferably, the rubber ring sealing groove is arranged in the inner ring of the metal ring sealing groove.
Compared with the prior art, the utility model has the following beneficial effects:
1. the transmission line and the transmission flange are integrally processed, so that the sealing performance of the transmission line is improved;
2. according to the utility model, the metal ring sealing groove and the rubber ring sealing groove are integrated on the transmission flange, so that flexible replacement of the two sealing rings is facilitated; the insulating joint is used for preventing temperature and voltage interference between the mass spectrometer and the transmission device;
3. the utility model ensures the gas path connection between the pipeline in the insulating joint and the ion source sample inlet by using the spring;
4. the utility model realizes the overall temperature control of the transmission device through the temperature control device integrated in the heat preservation layer.
Compared with the prior art, the structure that this patent provided can satisfy the demand of GC-MS transmission device under different application environment better.
Drawings
FIG. 1 is a schematic cross-sectional view of a GC-MS sample transfer apparatus according to the present utility model;
fig. 2 is a schematic structural diagram of a transmission flange in a GC-MS sample transmission apparatus according to the present utility model.
The numbers in the figure are as follows:
101. an insulated joint; 102. a limiting hole; 103. a spring; 104. a transmission line; 105. a transmission flange; 106. a metal ring seal groove; 107. sealing grooves of the rubber rings; 108. a sample transfer line; 109. a heat preservation layer; 110. a temperature control device; 111. a transmission line housing; 112. a chromatographic interface; 201. and a connecting screw hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
As shown in fig. 1 and 2, the present utility model provides a GC-MS sample transmission apparatus, which is suitable for connection between GC-MS instruments; the mass spectrometer comprises a transmission line 104, a transmission flange 105 integrally formed with the transmission line 104 is arranged on the transmission flange 105, a metal ring sealing groove, a rubber ring sealing groove and a connecting screw hole 201 are formed in the transmission flange 105, the metal ring sealing groove and the rubber ring sealing groove are embedded in the metal ring sealing groove and the rubber ring sealing groove, and the transmission flange 105 is fixedly connected with a cavity of the mass spectrometer through the connecting screw hole 201 and a fastener.
A sample transmission pipeline 108 is arranged in the transmission line 104, one end of the sample transmission pipeline 108 is connected with a chromatographic column in the gas chromatograph through a chromatographic interface 112, and the other end of the sample transmission pipeline 108 is connected with an ion source sample inlet in the mass spectrometer.
Further, one side of the transmission flange 105 provided by the utility model is connected with the cavity of the mass spectrometer through the connecting screw hole 201, the other side of the transmission flange 105 is connected with the transmission line housing 111, the transmission line housing 111 is sleeved outside the transmission line 104, a heat preservation layer 109 is arranged between the transmission line housing 111 and the transmission line 104, a temperature control device 110 is arranged in the heat preservation layer 109, the temperature control device 110 is connected with a control device arranged outside the transmission line housing 111 through a connecting wire, and the control device can control the whole temperature of the transmission line 104 through the temperature control device 110 and the heat preservation layer 109.
Further, an insulating joint 101 is arranged in a cavity of the mass spectrometer, one end of the insulating joint 101 is embedded at one end of a transmission line 104 and is connected with a sample transmission pipeline 108, the other end of the insulating joint 101 is connected with an ion source sample inlet in the mass spectrometer, and the ion source sample inlet, the insulating joint 101, the sample transmission pipeline 108, a chromatographic interface 112 and a chromatographic column are positioned on the same axis. The insulating joint 101 can isolate the voltage and temperature interference between the transmission line 104 and the ion source, and meanwhile, the pipeline inside the insulating joint can ensure the connection of gas paths.
Further, in order to make the insulating joint 101 attach to the ion source sample inlet inside the mass spectrometer as much as possible, the insulating joint 101 is embedded at one end of the transmission line 104 through the spring 103, a limiting groove is arranged in the middle section of the insulating joint 101, a limiting hole 102 is arranged at the end of the transmission line 104, the limiting hole 102 at the end of the transmission line 104 corresponds to the limiting groove in the middle section of the insulating joint 101, and the position of the insulating joint 101 is determined through an inserted bolt in the limiting hole 102 and the spring 103.
The working principle of the utility model is as follows:
in operation, the sample transfer apparatus is installed between a gas chromatograph and a mass spectrometer, the transfer flange 105 is connected to the cavity of the mass spectrometer, and the gasket is sealed by tightening the screw inside the connection screw hole 201. Part of the transmission line 104 is inserted into the mass spectrometer, the position of the insulating joint 101 is determined through the bolt and the spring 103 in the limiting hole 102, so that the insulating joint 101 is attached to an ion source sample inlet in the mass spectrometer as much as possible, the insulating joint 101 plays a role in isolating voltage and temperature interference between the transmission line 104 and the ion source, and meanwhile, a pipeline in the insulating joint can ensure gas circuit connection. The chromatographic interface 112 is connected with a chromatographic column in the gas chromatograph, so that the ion source sample inlet, the insulating joint 101, the sample transmission pipeline 108, the chromatographic interface 112 and the chromatographic column are ensured to be positioned on the same axis.
When the instrument works in a relatively low-temperature environment or needs to recycle the gasket, the rubber gasket is selected as the seal, and when the instrument works in a relatively high-temperature environment or has higher requirement on the vacuum degree, the metal gasket is selected as the seal.
The transmission line and the transmission flange are integrally processed, so that the sealing performance of the transmission line is improved; the metal ring sealing groove and the rubber ring sealing groove are integrated on the transmission flange, so that flexible replacement of the two sealing rings is facilitated; the temperature and voltage interference between the mass spectrometer and the transmission device is prevented by using the insulating joint, and the gas path connection between a pipeline in the insulating joint and the ion source sample inlet is ensured by using the spring; the whole temperature control of the transmission device is realized through the temperature control device integrated in the heat preservation layer. Compared with the prior art, the structure that this patent provided can satisfy the demand of different GC-MS transmission device under the application environment better.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (10)
1. The GC-MS sample transmission device comprises a transmission line (104), and is characterized in that a transmission flange (105) is arranged on the transmission line (104), a metal ring sealing groove (106) and a rubber ring sealing groove (107) are arranged on the transmission flange (105), and the metal ring sealing groove and the rubber ring sealing groove on the transmission flange (105) are connected with a cavity of a mass spectrometer through the metal ring sealing groove and the rubber ring sealing groove; the gas chromatograph is characterized in that a sample transmission pipeline (108) is arranged in the transmission line (104), one end of the sample transmission pipeline (108) is connected with a chromatographic column in the gas chromatograph through a chromatographic interface (112), and the other end of the sample transmission pipeline (108) is connected with an ion source sample inlet in the mass spectrometer.
2. A GC-MS sample transmission apparatus according to claim 1, wherein the transmission line (104) is integrally formed with the transmission flange (105).
3. A GC-MS sample transfer apparatus according to any of claims 1 or 2, wherein one side of the transfer flange (105) is connected to the mass spectrometer cavity, the other side of the transfer flange (105) is connected to a transfer line housing (111), and the transfer line housing (111) is sleeved outside the transfer line (104).
4. A GC-MS sample transmission device according to claim 3, wherein a thermal insulation layer (109) is provided between the transmission line housing (111) and the transmission line (104).
5. The GC-MS sample transmission apparatus as defined in claim 4, wherein a temperature control device (110) is provided in the thermal insulation layer (109), and the temperature control device (110) is connected to a control device provided outside the transmission line housing (111) through a connection line.
6. The GC-MS sample transmission apparatus as defined in claim 1, wherein an insulating joint (101) is disposed in the cavity of the mass spectrometer, one end of the insulating joint (101) is embedded in one end of the transmission line (104) and connected to the sample transmission line (108), and the other end of the insulating joint (101) is connected to the ion source sample inlet in the mass spectrometer.
7. The GC-MS sample transfer apparatus of claim 6, wherein the ion source sample inlet, the insulated connector (101), the sample transfer line (108), the chromatographic interface (112), and the chromatographic column are on the same axis.
8. The GC-MS sample transmission apparatus of claim 6, wherein the insulated connector (101) is embedded at one end of the transmission line (104) by a spring (103).
9. The GC-MS sample transmission apparatus as defined in claim 7, wherein a limit groove is provided in a middle section of the insulating joint (101), a limit hole (102) is provided at an end of the transmission line (104), and the limit hole (102) at the end of the transmission line (104) corresponds to the limit groove in the middle section of the insulating joint (101).
10. The GC-MS sample transmission apparatus of claim 1, wherein the rubber ring seal groove (107) is disposed within an inner race of the metal ring seal groove (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223334189.7U CN219533043U (en) | 2022-12-13 | 2022-12-13 | GC-MS sample transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223334189.7U CN219533043U (en) | 2022-12-13 | 2022-12-13 | GC-MS sample transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219533043U true CN219533043U (en) | 2023-08-15 |
Family
ID=87651610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223334189.7U Active CN219533043U (en) | 2022-12-13 | 2022-12-13 | GC-MS sample transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219533043U (en) |
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2022
- 2022-12-13 CN CN202223334189.7U patent/CN219533043U/en active Active
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