CN220795089U - Vacuum storage and different partial pressure atmosphere pretreatment device for transmission electron microscope sample rod - Google Patents
Vacuum storage and different partial pressure atmosphere pretreatment device for transmission electron microscope sample rod Download PDFInfo
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- CN220795089U CN220795089U CN202321619558.9U CN202321619558U CN220795089U CN 220795089 U CN220795089 U CN 220795089U CN 202321619558 U CN202321619558 U CN 202321619558U CN 220795089 U CN220795089 U CN 220795089U
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- pipeline
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 93
- 239000012520 frozen sample Substances 0.000 claims abstract description 15
- 239000011521 glass Substances 0.000 claims description 30
- 230000000694 effects Effects 0.000 abstract description 7
- 238000007781 pre-processing Methods 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a vacuum storage and different partial pressure atmosphere pretreatment device for a transmission electron microscope sample rod. The original pipeline capable of storing the sample rod is additionally provided with an external component capable of being externally connected with a gas pipe fitting, the external component comprises an air inlet valve and an air inlet, and a pressure display device is matched, the device has a vacuum storage function before transformation, can be used as preprocessing equipment with different partial pressures under the atmosphere condition after transformation, and can keep the preprocessing effect when being matched with a frozen sample rod for use, so that the device is not influenced by the vacuum condition of an electron microscope, and is required by different types of test conditions.
Description
Technical Field
The application relates to a vacuum storage and different partial pressure atmosphere pretreatment device for a transmission electron microscope sample rod, belonging to the field of electron microscope equipment.
Background
At present, the sample rod of the conventional transmission electron microscope is directly exposed to the outside, and water vapor and pollutants in the air can be attached to the surface of the sample rod due to the long-term exposure of the sample rod to the atmosphere. When the sample rod is sent into the transmission electron microscope, the time for vacuumizing the electron microscope is prolonged due to the fact that the pollutants attached to the surface are slowly released under the vacuum effect, and more serious, the pollutants enter the vacuum cavity of the electron microscope to pollute the vacuum cavity, the pole shoe and other parts. Therefore, it is necessary to store the transmission electron microscope sample rod in a vacuum device.
For frozen sample rods, the low temperature is achieved by conducting the low temperature (liquid nitrogen temperature) of the trailing dewar section to the sample head. It is necessary to ensure that the vacuum layer of the dewar is maintained at a high vacuum to avoid temperature loss. The molecular sieve for absorbing water vapor is arranged in the vacuum layer of the Dewar jar, so that the frozen sample rod needs to be baked before and after use to maintain good vacuum degree of the vacuum layer for better use effect. Meanwhile, the low-temperature part of the front end of the sample rod is exposed to the atmosphere to condense water vapor, and the heating and vacuumizing are also needed to be quickly recovered. The frozen sample rod is equipped with a heating temperature control device. It is necessary to provide vacuum equipment for heat treatment and storage.
In addition, the transmission electron microscope sample is usually subjected to pretreatment conditions before being tested, such as pretreatment under a certain partial pressure of a certain atmosphere for a certain period of time. The existing vacuum storage station has single function, and the vacuum condition of the electron microscope can influence the pretreatment effect, so that new function development is performed on the basis, and the problems that a sample rod of the transmission electron microscope is exposed to air and polluted and how to support pretreatment in various atmospheres and keep good pretreatment effect unaffected by the vacuum environment of the electron microscope are solved.
Disclosure of Invention
In order to better solve the problem that a transmission electron microscope sample rod is polluted when being exposed to air and how to support pretreatment of various atmospheres and keep good pretreatment effect from being influenced by electron microscope vacuum environment, according to one aspect of the application, a transmission electron microscope sample rod vacuum storage and different partial pressure atmosphere pretreatment device is provided, and the device comprises a vacuum system and a pipeline fixedly connected with the vacuum system through a connecting piece, wherein a plurality of angle valves are correspondingly arranged on the pipeline;
the plurality of stages of sample rod sockets are fixedly connected with the pipeline through an adapter flange;
the pipeline is also connected with a plurality of stages of transparent glass tubes;
an external assembly is arranged on the sample rod socket and/or the transparent glass tube, and the external assembly comprises an air inlet valve and an air inlet, and can be externally connected with an air pipe fitting;
at least one sample rod socket provided with an external assembly and/or a pressure display device is also arranged on the transparent glass tube;
and a vacuum gauge is further arranged on the pipeline.
Optionally, the plurality of stages of sample rod sockets are arranged in one-to-one correspondence with the plurality of stages of transparent glass tubes.
Optionally, a first external component is arranged at one end, far away from the pipeline, of at least one transparent glass tube, and the first external component comprises a first air inlet valve and a first air inlet;
under the form, the angle valve connected with the vacuum system and the pipeline is closed, after a sample rod carrying a sample is inserted into a sample rod socket, the angle valve connected with the pipeline is uniformly closed, an external gas path is communicated with a first gas inlet valve, then the first gas inlet valve is opened, gas required by pretreatment such as carbon dioxide, nitrogen, ethylene, ethane, methane, oxygen and the like is introduced from the external gas path, a pressure display device is observed, after the required partial pressure is reached, the first gas inlet valve is closed, at this time, the sample pretreatment can be carried out under the condition, and then the subsequent electron microscope test is carried out;
if the vacuum transmission frozen sample rod is used, the front end of the sample can be sealed, then liquid nitrogen is added for freezing preservation, and then the subsequent electron microscope test is carried out.
Optionally, an external component is disposed on at least one group of the transparent glass tube and the sample rod socket, and specifically includes:
a first external assembly is arranged at one end, far away from the pipeline, of the transparent glass tube, and the first external assembly comprises a first air inlet valve and a first air inlet;
a second external assembly is arranged on the sample rod socket, and the second external assembly comprises a second air inlet valve and a second air inlet;
in the form, an angle valve connected with a vacuum system and a pipeline is closed, after a sample rod carrying a sample is inserted into a sample rod socket, the group of pipelines with the sample rod is communicated with a pipeline with an external assembly after transformation, an external gas path is communicated with a first gas inlet valve and a second gas inlet valve, then the first gas inlet valve and the second gas inlet valve are opened, gas required by pretreatment such as carbon dioxide, nitrogen, ethylene, ethane, methane, oxygen and the like is introduced through the external gas path, gas displacement is firstly carried out, then the second gas inlet valve is closed, a pressure display device is observed, after the required partial pressure is reached, the first gas inlet valve and the second gas inlet valve are closed, at this time, the sample pretreatment can be carried out under the condition, and then the subsequent electron microscope test is carried out;
if the vacuum transmission frozen sample rod is used, the front end of the sample can be sealed, then liquid nitrogen is added for freezing preservation, and then the subsequent electron microscope test is carried out.
Optionally, the transparent glass tube and the sample rod socket are respectively arranged at two sides of the pipeline.
Optionally, a plug seal is inserted into the sample rod socket into which the sample rod is not inserted.
Optionally, the pressure display device is one of a pressure gauge, a pressure sensor and a vacuum gauge.
Optionally, an external interface is further provided on the pipeline.
Optionally, the external interface is externally connected with a hose, and the hose is connected with the vacuum layer of the frozen sample rod and is used for drying the water absorbing material in the vacuum layer before/after the frozen sample rod is used.
Optionally, the vacuum system comprises vacuum equipment such as a mechanical pump, a molecular pump and the like and connecting pipelines.
The beneficial effects that this application can produce include:
1) According to the vacuum storage and different partial pressure atmosphere pretreatment device for the transmission electron microscope sample rod, the air inlet valve and the air inlet are respectively arranged on the vacuum storage and different partial pressure atmosphere pretreatment device, the air pipe fitting can be externally connected, the different partial pressure pretreatment functions of different atmospheres can be realized, and meanwhile, the pretreatment effect can be kept when the transmission electron microscope sample rod is matched for use, so that the transmission electron microscope sample rod is not influenced by electron microscope vacuum conditions;
2) The vacuum storage and different partial pressure atmosphere pretreatment device for the transmission electron microscope sample rod provided by the application avoids the problem that the transmission electron microscope sample rod is exposed to the atmosphere for a long time, and water vapor and pollutants in the air can be attached to the surface of the sample rod;
3) The utility model provides a transmission electron microscope sample pole vacuum storage and different partial pressure atmosphere preprocessing device, easy operation is convenient for install, and it is convenient to maintain and dismantle.
Drawings
Fig. 1 is a schematic diagram of a vertical structure of a sample rod vacuum storage and different partial pressure atmosphere pretreatment device of a transmission electron microscope provided in embodiment 1 of the present application.
List of parts and reference numerals:
1. a vacuum system; 2. an angle valve; 3. a connecting piece; 4. a transparent glass tube; 5. a sample rod socket; 6. an adapter flange; 7. a blocking piece; 8. a vacuum gauge; 9. an external interface; 10. a pressure display device; 11. a first intake valve; 12. a first air inlet; 13. a second intake valve; 14. a second air inlet; 15. and (5) a pipeline.
Detailed Description
The present application is described in detail below with reference to examples, but the present application is not limited to these examples.
Example 1
The vacuum storage and different partial pressure atmosphere pretreatment device for the transmission electron microscope sample rod comprises a vacuum system 1 and a pipeline 15 fixedly connected with the vacuum system through a connecting piece 3, wherein a four-stage angle valve 2 is correspondingly arranged on the pipeline 15;
the three-stage sample rod jack 5 is fixedly connected with the pipeline 15 through the adapter flange 6;
the pipeline 15 is also connected with a three-level transparent glass tube 4;
the sample rod sockets 5 are arranged in one-to-one correspondence with the transparent glass tubes 4, and are correspondingly provided with angle valves 2;
the transparent glass tube 4 and the sample rod socket 5 are respectively arranged at two sides of the pipeline 15;
the sample rod socket 5 provided with an external assembly is also provided with a pressure display device 10;
the pressure display device 10 is a vacuum gauge;
the pipeline 15 is also provided with a vacuum gauge 8 and an external connector 9, the external connector 9 is externally connected with a hose, and the hose is connected with a vacuum layer of the frozen sample rod and is used for drying the water-absorbing material in the vacuum layer before/after the frozen sample rod is used;
inserting a plug 7 into the sample rod socket 5 without the sample rod for sealing;
the vacuum system 1 includes vacuum equipment such as a mechanical pump and a molecular pump, and a connecting pipeline 15, and it should be understood that the present solution is not limited to the form of the vacuum system 1, and although a vertical vacuum storage station is shown in fig. 1, a horizontal vacuum storage station or other forms of vacuum storage stations may be used.
An external assembly is arranged on a group of transparent glass tubes 4 and sample rod sockets 5, and specifically comprises:
a first external component is arranged at one end of the transparent glass tube 4, which is far away from the pipeline 15, and comprises a first air inlet valve 11 and a first air inlet 12;
providing a second external assembly on one of said sample rod sockets 5, said second external assembly comprising a second air inlet valve 13 and a second air inlet port 14;
in this form, the angle valve 2 connected with the vacuum system 1 and the pipeline 15 is closed, after a sample rod carrying a sample is inserted into the sample rod jack 5, the group of pipelines with the sample rod is communicated with the pipelines with the external components after modification, the external gas path is communicated with the first gas inlet valve 11 and the second gas inlet valve 13, then the first gas inlet valve 11 and the second gas inlet valve 13 are opened, gas required by pretreatment such as carbon dioxide, nitrogen, ethylene, ethane, methane, oxygen and the like is introduced through the external gas path, the pressure display device 10 is observed, gas displacement is firstly carried out, then the second gas inlet valve is closed, after the required partial pressure is reached, the first gas inlet valve 11 and the second gas inlet valve 13 are closed, at this time, the sample pretreatment can be carried out under the condition, and then the subsequent electron microscope test is carried out;
if the vacuum transmission frozen sample rod is used, the front end of the sample can be sealed, then liquid nitrogen is added for freezing preservation, and then the subsequent electron microscope test is carried out.
Example 2
The vacuum storage and different partial pressure atmosphere pretreatment device for the transmission electron microscope sample rod comprises a vacuum system 1 and a pipeline 15 fixedly connected with the vacuum system through a connecting piece 3, wherein a six-stage angle valve 2 is correspondingly arranged on the pipeline 15;
the pipeline 15 is also connected with a five-stage transparent glass tube 4;
the five-stage sample rod sockets 5 are fixedly connected with the pipeline 15 through the adapter flange 6, and the sample rod sockets 5 are arranged in one-to-one correspondence with the transparent glass tubes 4 and are correspondingly provided with angle valves 2;
the transparent glass tube 4 and the sample rod socket 5 are respectively arranged at two sides of the pipeline 15;
a first external connection assembly is arranged at one end of the transparent glass tube 4, which is far away from the pipeline 15, and comprises a first air inlet valve 11 and a first air inlet 12;
the sample rod socket 5 provided with an external assembly and the transparent glass tube 4 are also provided with a pressure display device 10;
the pressure display device 10 is a vacuum gauge;
the pipeline 15 is also provided with a vacuum gauge 8 and an external connector 9, the external connector 9 is externally connected with a hose, and the hose is connected with a vacuum layer of the frozen sample rod and is used for drying the water absorbing material in the vacuum layer before and after the frozen sample rod is used;
inserting a plug 7 into the sample rod socket 5 without the sample rod for sealing;
the vacuum system 1 includes a mechanical pump, a molecular pump, and other vacuum devices and a connecting pipeline 15, and it should be understood that the present solution is not limited to the form of the vacuum system 1.
In this form, the angle valve 2 connected with the vacuum system 1 and the pipeline 15 is closed, after a sample rod carrying a sample is inserted into the sample rod socket 5, the angle valve 2 connected with the pipeline 15 is uniformly closed, an external gas path is communicated with the first gas inlet valve 11, then the first gas inlet valve 11 is opened, gas required by pretreatment such as carbon dioxide, nitrogen, ethylene, ethane, methane, oxygen and the like is introduced through the external gas path, the pressure display device 10 is observed, after the required partial pressure is reached, the first gas inlet valve 11 is closed, at this time, the sample pretreatment can be carried out under the condition, and then the subsequent electron microscope test is carried out;
if the vacuum transmission frozen sample rod is used, the front end of the sample can be sealed, then liquid nitrogen is added for freezing preservation, and then the subsequent electron microscope test is carried out.
The above two embodiments are respectively the modification of the transparent glass tube 4 only/the modification of the transparent glass tube 4 and the sample rod socket 5 of the same stage, but it is also possible to modify the sample rod socket 5 only or the modification of the transparent glass tube 4 and the sample rod socket 5 of different stages.
The foregoing is only a few examples of the present application and is not intended to limit the present application, but the present application is disclosed in the preferred examples, and the present application is not limited to the above-described examples, and any person skilled in the art will make some changes or modifications with the technical content disclosed in the foregoing description and equivalent embodiments without departing from the scope of the technical solutions of the present application.
Claims (10)
1. The vacuum storage and different partial pressure atmosphere pretreatment device for the transmission electron microscope sample rod is characterized by comprising a vacuum system and a pipeline fixedly connected with the vacuum system through a connecting piece, wherein a plurality of angle valves are correspondingly arranged on the pipeline;
the plurality of stages of sample rod sockets are fixedly connected with the pipeline through an adapter flange;
the pipeline is also connected with a plurality of stages of transparent glass tubes;
an external assembly is arranged on the sample rod socket and/or the transparent glass tube, and the external assembly comprises an air inlet valve and an air inlet;
at least one sample rod socket provided with an external assembly and/or a pressure display device is also arranged on the transparent glass tube;
and a vacuum gauge is further arranged on the pipeline.
2. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 1, wherein a plurality of stages of sample rod sockets are arranged in one-to-one correspondence with a plurality of stages of transparent glass tubes.
3. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 2, wherein a first external component is arranged at one end of at least one transparent glass tube far away from the pipeline, and the first external component comprises a first air inlet valve and a first air inlet.
4. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 2, wherein an external connection assembly is arranged on at least one group of transparent glass tubes and the sample rod sockets, and the device specifically comprises:
a first external assembly is arranged at one end, far away from the pipeline, of the transparent glass tube, and the first external assembly comprises a first air inlet valve and a first air inlet;
and a second external assembly is arranged on the sample rod socket and comprises a second air inlet valve and a second air inlet.
5. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 1, wherein the transparent glass tube and the sample rod socket are respectively arranged at two sides of the pipeline.
6. The transmission electron microscope sample rod vacuum storage and different partial pressure atmosphere pretreatment device according to claim 1, wherein a plug seal is inserted into the sample rod socket without the sample rod inserted therein.
7. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 1, wherein the pressure display device is one of a pressure gauge, a pressure sensor and a vacuum gauge.
8. The device for vacuum storage and different partial pressure atmosphere pretreatment of a transmission electron microscope sample rod according to claim 1, wherein an external interface is further arranged on the pipeline.
9. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 8, wherein the external interface is externally connected with a hose, and the hose is connected with a vacuum layer of a frozen sample rod.
10. The device for vacuum storage and pretreatment of different partial pressure atmospheres of a transmission electron microscope sample rod according to claim 1, wherein the vacuum system comprises a mechanical pump, a molecular pump and a connecting pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321619558.9U CN220795089U (en) | 2023-06-25 | 2023-06-25 | Vacuum storage and different partial pressure atmosphere pretreatment device for transmission electron microscope sample rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321619558.9U CN220795089U (en) | 2023-06-25 | 2023-06-25 | Vacuum storage and different partial pressure atmosphere pretreatment device for transmission electron microscope sample rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220795089U true CN220795089U (en) | 2024-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321619558.9U Active CN220795089U (en) | 2023-06-25 | 2023-06-25 | Vacuum storage and different partial pressure atmosphere pretreatment device for transmission electron microscope sample rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220795089U (en) |
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2023
- 2023-06-25 CN CN202321619558.9U patent/CN220795089U/en active Active
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