CN112881441A - Unlimited rotation device for CT scanning of low-temperature high-pressure sample - Google Patents
Unlimited rotation device for CT scanning of low-temperature high-pressure sample Download PDFInfo
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- CN112881441A CN112881441A CN202110085590.2A CN202110085590A CN112881441A CN 112881441 A CN112881441 A CN 112881441A CN 202110085590 A CN202110085590 A CN 202110085590A CN 112881441 A CN112881441 A CN 112881441A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/18—Investigating the presence of flaws defects or foreign matter
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Abstract
The invention belongs to the technical field of nondestructive detection of hydrates, and discloses an infinite rotating device for CT scanning of a low-temperature high-pressure sample, wherein a base and an objective table are fixed without freedom, so that an upper sample chamber and the objective table can rotate coaxially without shaking; the base, the pressure chamber and the top cover are in sealing connection without freedom degree, and the base and the top cover are respectively inserted into two ends of the pressure chamber to ensure that the base, the pressure chamber and the top cover are coaxially sealed; the pressure chamber is made of low-density pressure-resistant material, a sample to be tested for an experiment is filled in the pressure chamber, and the whole pressure chamber is scanned in a rotating mode; the base and the top cover are respectively sealed with the rotating shell of the outer ring, the rotating shell can rotate infinitely, and the temperature control chamber is in constraint fit with the rotating shell and is jointly fixed on the outer rack of the objective table. Under the drive of the objective table, the base, the pressure chamber and the top cover rotate together, the rotating shell and the temperature control chamber are kept static, the pressure pipelines are connected to the rotating shell, and the sample chamber rotates without causing winding of peripheral pipelines. The invention has the characteristics of flexible disassembly and assembly, unlimited rotation and the like.
Description
Technical Field
The invention belongs to the technical field of nondestructive testing of hydrates, and particularly relates to an infinite rotating device for CT scanning of a low-temperature high-pressure sample.
Background
In recent years, natural gas hydrate research is increasingly carried out by using an industrial CT nondestructive detection means in scientific research, at present, an industrial CT experimental system used at home and abroad generally comprises a radiation source, a detector and an object stage, the radiation source emits X-rays which pass through a sample to be attenuated and then are received by the detector and then are processed and converted into a three-dimensional image, the object stage generally has three-dimensional translation and infinite rotation functions, the object stage is required to rotate for a plurality of degrees or even a circle so that CT scanning detection data can be reconstructed into a three-dimensional image, a sample to be detected is firstly placed on the object stage in a detection process, and the center of the sample to be detected and the center of the object. Industrial CT currently uses 360 ° of sample (stage) rotation for optimal scanning, and the image resolution is inversely proportional to the sample-to-source distance, which requires that the sample to be measured can be rotated with the stage with only possibly short source distance and with stability.
The natural gas hydrate can exist stably only in a high-pressure low-temperature environment, and a pump is also required to be connected for control in the research of decompression decomposition or seepage characteristics, so that the requirement of an experimental system for a temperature control device and a peripheral high-pressure pipeline is required. The industrial CT object stage has the characteristic of rotation, the temperature control device is required to not influence CT rays, and the high-pressure pipeline cannot hinder the object stage from rotating, so that the industrial CT scanning device which can be flexibly assembled and disassembled, can infinitely rotate and can control temperature and pressure needs to be designed.
The invention aims to provide an infinite rotating device for CT scanning of low-temperature and high-pressure samples, which optimizes a temperature control mode, avoids pipeline winding, cancels the rotation of an object stage, improves the operation efficiency, reduces the object distance, improves the CT imaging resolution and realizes CT continuous scanning imaging.
Disclosure of Invention
In order to solve the problems, the invention provides an infinite rotating device for CT scanning of low-temperature and high-pressure samples, and optimally designs an industrial CT scanning device which can be flexibly assembled and disassembled, can be infinitely rotated and can control temperature and pressure.
The technical scheme of the invention is as follows:
an infinite rotating device for CT scanning of low-temperature high-pressure samples comprises an object stage positioned at the lowest part of the device, wherein a base of an integral reaction kettle is placed on the object stage; the outermost temperature control chamber of the device is connected with the base through a second rotary shell, a pressure chamber is arranged in the temperature control chamber, and a sample chamber in which a sample to be shot is arranged in the pressure chamber; the upper part of the pressure chamber is connected with a top cover, and the top cover is connected with the outer temperature control chamber through a first rotary shell; the X-ray source is positioned on the left side of the integral device, and the detector is positioned on the right side of the integral device;
the base is designed to be large in diameter, the whole device is stabilized, the base and the objective table are fixed without freedom, and the upper sample chamber and the objective table can rotate coaxially without shaking; the base, the pressure chamber and the top cover are in sealing connection without freedom degree, the base and the top cover are respectively inserted into two ends of the pressure chamber, and the inserted part is divided into a circular rubber ring sealing part and a square positioning matching part to ensure that the three parts are coaxially sealed; the pressure chamber is made of low-density pressure-resistant material, a sample to be tested for an experiment is filled in the pressure chamber, and the whole pressure chamber is scanned in a rotating mode; the base and the top cover are respectively sealed with the rotating shell of the outer ring, the rotating shell can rotate infinitely, and the temperature control chamber is in constraint fit with the rotating shell and is jointly fixed on the outer rack of the objective table.
A ventilation pipeline and a ventilation pipeline are arranged below the base; a first flow passage opening and a second flow passage opening are formed in the left side of the second rotary shell; the first flow opening and the second flow opening on the rotary shell and the ventilation pipeline on the base provide channels for pressurizing the inside of the pressure chamber.
When the CT device is used for scanning the wireless rotating device, the base, the pressure chamber and the top cover rotate together under the driving of the objective table, the second rotating shell and the temperature control chamber are kept static, the pressure pipelines are connected to the second rotating shell, the sample chamber rotates without causing the winding of peripheral pipelines, the ray attenuation can be eliminated by adopting a transparent window in the ray passing region on the temperature control chamber, the distance between the sample and a ray source is only the diameter of the sample chamber plus the thickness of one side of the temperature control chamber, and therefore the scanning resolution ratio is improved and the scanning efficiency is improved.
The base, the second rotating shell, the pressure chamber and the top cover are pressure-resistant sealing devices so as to maintain the high-pressure environment of the sample chamber.
And a third flow passage opening is formed in the center position of the top cover and the center position of the first rotating shell, and a passage is provided for pressurizing the inside of the pressure chamber.
The invention has the beneficial effects that: the infinite rotation of the low-temperature high-pressure CT scanning sample can be realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1, a ventilation pipeline; 2, an object stage; 3 a first runner port; 4 a second runner port; 5, an X-ray source; 6, a sample chamber; 7 a third flow opening; 8 a first rotary housing; 9, a top cover; 10 pressure chambers; 11, controlling the temperature chamber; 12 a second rotating housing; 13 a base; 14 a vent line; 15, a detector.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings.
Fig. 1 shows an infinite rotation device for CT scanning of a low-temperature high-pressure sample, which comprises three parts, namely a carrier area at the lower part of the whole device, a heat preservation area at the outer side of the whole device, and a shooting area at the inner side of the device. The object stage 2 is positioned at the lowest part of the device, and a base 13 of the whole reaction kettle is placed on the object stage. The outermost temperature control chamber 11 of the device is connected with the base 13 through a second rotary shell 12, a pressure chamber 10 is arranged in the temperature control chamber 11, and a sample chamber 6 for shooting a sample is arranged in the pressure chamber 10. The upper part of the pressure chamber 10 is connected with a top cover 9, and the top cover 9 is connected with an outer temperature control chamber 11 through a first rotary shell 8. The X-ray source 5 is located on the left side of the overall apparatus and the detector 15 is located on the right side of the overall apparatus.
The base 13, the second rotary housing 12, the pressure chamber 10 and the top cover 9 are pressure-resistant sealing devices to maintain the high-pressure environment of the sample chamber 6.
The ventilation pipeline 1 and the ventilation pipeline 14 are arranged below the base 13. The first flow port 3 and the second flow port 4 are provided on the left side of the second rotary case 12. The first flow port 3 and the second flow port 4 on the rotary shell and the ventilation pipeline 1 on the base, and the ventilation pipeline 14 provide a passage for pressurizing the inside of the pressure chamber 10.
The center of the top cover 9 and the center of the first rotary housing 8 are provided with a third flow passage 7 for providing a passage for pressurizing the inside of the pressure chamber 10.
The present invention is not limited to the structures and steps described in the above embodiments. The above is only a basic description of the inventive concept, and any equivalent changes or combinations made according to the technical solutions of the present invention should fall within the protection scope of the present invention.
Claims (5)
1. An infinite rotating device for CT scanning of low-temperature and high-pressure samples is characterized by comprising an object stage (2) positioned at the lowest part of the device, wherein a base (13) of an integral reaction kettle is placed on the object stage (2); the outermost temperature control chamber (11) of the device is connected with the base (13) through a second rotary shell (12), a pressure chamber (10) is arranged in the temperature control chamber (11), and a sample chamber (6) in which a sample to be shot is arranged in the pressure chamber (10); the upper part of the pressure chamber (10) is connected with a top cover (9), and the top cover (9) is connected with an outer temperature control chamber (11) through a first rotary shell (8); the X-ray source (5) is positioned on the left side of the integral device, and the detector (15) is positioned on the right side of the integral device;
when the wireless rotating device is scanned by using the CT device, the base (13), the pressure chamber (10) and the top cover (9) rotate together under the driving of the objective table (2), the second rotating shell (12) and the temperature control chamber (11) are kept static, the pressure pipelines are connected to the second rotating shell (12), and the sample chamber (6) rotates without causing the winding of peripheral pipelines.
2. The infinite rotation device for CT scanning of samples at low temperature and high pressure according to claim 1, wherein the base (13), the second rotation housing (12), the pressure chamber (10) and the top cover (9) are pressure-resistant enclosures to maintain the high pressure environment of the sample chamber (6).
3. The infinite rotary device for CT scanning of samples at low temperature and high pressure according to claim 1 or 2, wherein a ventilation pipeline (1) and a ventilation pipeline (14) are arranged below the base (13); a first flow opening (3) and a second flow opening (4) are arranged on the left side of the second rotary shell (12); the first flow opening (3) and the second flow opening (4) on the rotary shell, and the ventilation pipeline (1) and the ventilation pipeline (14) on the base (13) provide channels for pressurizing the interior of the pressure chamber (10).
4. The infinite rotary device for CT scanning of samples at low temperature and high pressure according to claim 1 or 2, wherein the central position of the top cover (9) and the central position of the first rotary housing (8) are provided with a third flow channel port (7) for providing a passage for pressurizing the inside of the pressure chamber (10).
5. The infinite rotary device for CT scanning of samples at low temperature and high pressure according to claim 3, wherein the central position of the top cover (9) and the central position of the first rotary housing (8) are provided with a third flow channel port (7) for providing a passage for pressurizing the interior of the pressure chamber (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110085590.2A CN112881441B (en) | 2021-01-22 | 2021-01-22 | Unlimited rotation device for CT scanning of low-temperature high-pressure sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110085590.2A CN112881441B (en) | 2021-01-22 | 2021-01-22 | Unlimited rotation device for CT scanning of low-temperature high-pressure sample |
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| CN112881441A true CN112881441A (en) | 2021-06-01 |
| CN112881441B CN112881441B (en) | 2022-10-11 |
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| CN202110085590.2A Active CN112881441B (en) | 2021-01-22 | 2021-01-22 | Unlimited rotation device for CT scanning of low-temperature high-pressure sample |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113984760A (en) * | 2021-10-13 | 2022-01-28 | 北京探矿工程研究所 | Geological sample under-pressure scanning device and method |
| CN117368066A (en) * | 2023-10-10 | 2024-01-09 | 大连理工大学 | Nanometer CT hydrate in-situ generation-based seepage simulation device and application method thereof |
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2021
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984760A (en) * | 2021-10-13 | 2022-01-28 | 北京探矿工程研究所 | Geological sample under-pressure scanning device and method |
| CN113984760B (en) * | 2021-10-13 | 2023-09-01 | 北京探矿工程研究所 | Geological sample pressurized scanning device and method |
| CN117368066A (en) * | 2023-10-10 | 2024-01-09 | 大连理工大学 | Nanometer CT hydrate in-situ generation-based seepage simulation device and application method thereof |
| CN117368066B (en) * | 2023-10-10 | 2024-05-17 | 大连理工大学 | Nanometer CT hydrate in-situ generation-based seepage simulation device and application method thereof |
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| CN112881441B (en) | 2022-10-11 |
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