A system and method for analyzing carbon isotopes of carbon dioxide in inclusions

Abstract

The present invention discloses a carbon isotope analysis system and method for carbon dioxide in inclusions, which belongs to the field of geological sample analysis, and includes: a carrier, a sealing cover, an air intake device, a flat grinding device, a support plate, a flat grinding drive device, a telescopic rod, an exhaust device, a first heating plate, a carbon dioxide collection tube, a liquid nitrogen cup, a first electromagnetic three-way valve and an isotope mass spectrometer, a flat grinding chamber is arranged on the carrier, and the sealing cover is sealed at the top of the carrier; the telescopic rod is located on both sides of the carrier, and the support plate is located at the top of the telescopic rod; the flat grinding device extends into the flat grinding chamber; the first heating plate is installed at the bottom of the flat grinding chamber, and the air inlet and air outlet of the flat grinding chamber are respectively connected to the air intake device and the exhaust device, and the exhaust device, the carbon dioxide collection tube, and the first electromagnetic three-way valve are connected to the mass spectrometer. The present invention fully releases the impurity gas adsorbed on the surface of the sample by flat grinding; multiple flat grinding chambers greatly improve the amount of carbon dioxide collected during the experiment, and fully ensure the accuracy of the carbon isotope determination of carbon dioxide in the inclusions.

Description

Technical Field

[0001] The invention belongs to the field of geological sample analysis, and in particular relates to a system and method for analyzing carbon isotopes of carbon dioxide in inclusions. Background Art

[0002] The fluid trapped in the mineral during its growth process preserves various geological and geochemical information of the geological environment at that time. The material composition in fluid inclusions is the code for deciphering related geological processes. Therefore, a systematic study of fluid inclusions can obtain information such as the temperature and pressure conditions, the chemical composition of the fluid, and the source of the fluid during rock formation and mineralization, so as to find out the evolution and role of geological fluids during rock formation and mineralization, and explain the process and conditions of rock formation and mineralization. Carbon dioxide is a common component of fluid inclusions, usually preserved in the form of gas and liquid phases. The study of the carbon isotope composition of carbon dioxide in fluid inclusions can provide important information and basis for exploring rock formation, the source of mineralizing materials, the genesis of ore deposits, the physical and chemical conditions for the formation of ore deposits, the formation of oil and gas, the establishment of mineralization models, and the guidance of general prospecting and oil and gas exploration. The vacuum explosion method is the main method for extracting carbon dioxide from mineral inclusions.

[0003] In the prior art, the sample is first heated to 200 degrees in a vacuum tube, and then helium is introduced to discharge the adsorbed gas on the inner wall of the equipment, the surface of the mineral sample, and the gas in the secondary inclusions of the mineral, so as to reduce the interference of the carbon source on the surface of the sample; then the sample is heated to 600 degrees, the sample inclusions burst to release gas and liquid, and then the carbon dioxide in the gas and liquid is collected for isotope analysis. At the same time, since the sample used in the experiment is very small, the carbon dioxide in the inclusions obtained is also very small, and the influence of the carbon source in non-inclusions on the experimental results increases. Therefore, it is very important to remove the carbon source in non-inclusions. The method of only pre-heating the sample to discharge the carbon source adsorbed on the surface in the prior art is not thorough enough. Summary of the invention

[0004] In view of this, the present invention provides a system and method for analyzing carbon isotopes of carbon dioxide in inclusions to solve the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A carbon isotope analysis system for carbon dioxide in inclusions comprises: a carrier, a sealing cover, an air intake device, a flat grinding device, a support plate, a flat grinding drive device, a telescopic rod, an exhaust device, a first heating plate, a carbon dioxide collecting pipe, a liquid nitrogen cup, a first electromagnetic three-way valve and a mass spectrometer, wherein a flat grinding chamber is arranged on the carrier, the sealing cover is mounted on the top of the carrier and seals the flat grinding chamber; a pair of telescopic rods are located on both sides of the carrier, and the support plate is mounted on the output end of the telescopic rod; the flat grinding device and the flat grinding drive device are mounted on the support plate, and the output end of the flat grinding device passes through the sealing cover and extends into the flat grinding chamber; the first heating plate is mounted on the bottom end of the flat grinding chamber, and air intakes and air outlets are arranged on both sides of the flat grinding chamber, the air intake device is connected to the air intake, the exhaust device is connected to the air outlet, the exhaust device, the carbon dioxide collecting pipe, the first electromagnetic three-way valve and the mass spectrometer are sequentially connected, and the carbon dioxide collecting pipe is located in the liquid nitrogen cup.

[0007] Furthermore, the flat grinding device includes a flat grinding plate, a vertical rod and a second gear, and the flat grinding drive device includes a first motor and a first gear, the vertical rod is fixed to the top end of the flat grinding plate, and the flat grinding plate is located in the flat grinding cavity; the vertical rod passes through the sealing cover and the support plate, and is rotatably connected to the sealing cover and the support plate; the second gear is installed at the top end of the vertical rod, the first motor is installed on the support plate, the first gear is installed at the output end of the first motor, and the first gear is meshed with the second gear.

[0008] Furthermore, the carrier is provided with a plurality of flat grinding cavities, each of which is provided with an air inlet and an air outlet on both sides, the air intake device and the flat grinding device are provided with a plurality of them, the number of the air intake devices and the flat grinding devices is the same as the number of the air inlets, the plurality of air intake devices are respectively connected with the air inlets, and the exhaust device is connected with a plurality of air outlets at the same time; the first motor is located at one end of the support plate, the first gear at the top end of the first motor is meshed with the second gear in the adjacent flat grinding device, and the second gears in the plurality of flat grinding devices are meshed in sequence.

[0009] Furthermore, the air intake device includes an air intake pipe and a first solenoid valve, wherein the first solenoid valve is installed in the air intake pipe, and the air intake pipe is communicated with the air inlet.

[0010] Furthermore, the exhaust device includes multiple gas processing devices and a gas collection pipe, the number of the multiple gas processing devices is the same as the number of the gas outlets, the gas processing device includes a first gas outlet pipe, a second electromagnetic three-way valve, a second gas outlet pipe, a third gas outlet pipe, a first gas processing well and a second gas processing well, one end of the first gas outlet pipe is connected to the gas outlet, and the other end is connected to the second electromagnetic three-way valve, the second gas outlet pipe and the third gas outlet pipe are respectively connected to two output ends of the second electromagnetic three-way valve, the first gas processing well is installed on the second gas outlet pipe, the second gas processing well is installed on the third gas outlet pipe, the multiple third gas outlet pipes are all connected to the gas collection pipe, and the gas collection pipe is connected to the carbon dioxide collection pipe.

[0011] Furthermore, it also includes a second heating plate, which is installed at the bottom end of the flat grinding plate.

[0012] A method for using a carbon isotope analysis system for carbon dioxide in inclusions comprises the following steps:

[0013] S1. Open the sealing cover, and separate the flat grinding plate from the flat grinding chamber, put an equal amount of inclusion sample in each flat grinding chamber, re-enter the flat grinding chamber with the sealing cover, and seal the flat grinding chamber;

[0014] S2. The telescopic rod descends, causing the second heating plate at the bottom of the flat grinding plate to descend until it contacts the sample without generating pressure, driving the first motor, and transmitting through the meshing between the first gear and the second gear, and the plurality of second gears, so that the second heating plate in each flat grinding chamber flat grinds the inclusion sample;

[0015] S3. After grinding for a period of time, the first electromagnetic valve is opened to introduce helium into the grinding chamber, and the passage between the second electromagnetic three-way valve and the second gas outlet pipe is opened at the same time; the gas on the surface of the inclusion sample is fully released, and the excess air in the equipment is discharged, and the harmful gas is treated by the first gas treatment trap and then discharged into the air;

[0016] S4. After a period of time, the passage between the second electromagnetic three-way valve and the second outlet pipe is closed, and the passage between the second electromagnetic three-way valve and the third outlet pipe is opened at the same time, and helium is introduced into the second processing well, the gas collection pipe and the carbon dioxide collection pipe for emptying treatment, and discharged into the air through the first electromagnetic three-way valve;

[0017] S5. Close the first solenoid valve and the second solenoid three-way valve, energize the first heating plate and the second heating plate for heating, and heat the top surface and the ground of the inclusion at high temperature until the inclusion bursts and releases the gas in the inclusion;

[0018] S6. Open the passages of the first solenoid valve, the second solenoid three-way valve and the third outlet pipe, introduce helium gas to treat the water vapor in the air in the inclusion body when it passes through the second processing trap, collect the air in the gas collection pipe and then enter the carbon dioxide collection pipe, introduce liquid nitrogen into the liquid nitrogen cup, and the collected carbon dioxide solidifies under low temperature environment, and other gases are discharged into the air through the first solenoid three-way valve;

[0019] S7. Remove the liquid nitrogen cup and continue to introduce helium. The solidified carbon dioxide sublimates and turns back into gas. It passes through the first electromagnetic three-way valve and enters the mass spectrometer for isotope analysis and determination.

[0020] The beneficial effects of the present invention are:

[0021] The present invention uses a telescopic rod to move a flat grinding plate or a second heating plate at the bottom of the flat grinding plate downward in a flat grinding chamber to contact an inclusion sample. A first motor drives a first gear to rotate, and the first gear and a second gear, as well as a plurality of second gears, are meshed to transmit the flat grinding of the inclusion. Since it is only contact and not grinding, the gas adsorbed on the surface of the inclusion can be fully released without releasing the gas inside the inclusion. The gas in the inclusion enters a second gas treatment trap to treat water vapor, and the dry gas is in a carbon dioxide collection tube and a liquid nitrogen cup, carbon dioxide is condensed first, and other gases are discharged, and then the carbon dioxide is sublimated and enters a mass spectrometer. Since a plurality of flat grinding chambers are provided for simultaneous flat grinding, the amount of carbon dioxide collected is increased, and the accuracy of carbon isotope analysis and determination of carbon dioxide is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the carrier, the flat grinding device, the flat grinding drive device, the support plate and the telescopic rod.

[0024] Figure 2 It is a top view of the carrier, the flat grinding device, the flat grinding drive device, the support plate and the telescopic rod.

[0025] Figure 3 for Figure 2 Sectional view of AA.

[0026] Figure 4 for Figure 2 Cross-sectional view of BB.

[0027] Figure 5 Schematic diagram of the structure of the vector.

[0028] Figure 6 Schematic diagram of a carbon isotope analysis system for carbon dioxide in inclusions.

[0029] Among them, in the figure:

[0030] 10-carrier, 11-flat grinding chamber, 111-air inlet, 112-air outlet, 20-sealing cover, 30-air inlet device, 31-air inlet pipe, 32-first solenoid valve, 40-flat grinding device, 41-flat grinding plate, 42-vertical rod, 43-second gear, 50-support plate, 60-flat grinding drive device, 61-first motor, 62-first gear, 70-telescopic rod, 81-gas processing device, 811-first air outlet pipe, 812-second electromagnetic three-way valve, 813-second air outlet pipe, 814-third air outlet pipe, 815-first gas processing trap, 816-second gas processing trap, 82-gas collection pipe, 90-first heating plate, 100-carbon dioxide collection tube, 110-liquid nitrogen cup, 120-first electromagnetic three-way valve, 130-mass spectrometer, 140-second heating plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] Refer to the attached Figure 1-6As shown, the present invention provides a carbon isotope analysis system for carbon dioxide in inclusions, comprising: a carrier 10, a sealing cover 20, an air intake device 30, a flat grinding device 40, a support plate 50, a flat grinding drive device 60, a telescopic rod 70, an exhaust device, a first heating plate 90, a carbon dioxide collection pipe 100, a liquid nitrogen cup 110, a first electromagnetic three-way valve 120 and a mass spectrometer 130, a flat grinding chamber 11 is provided on the carrier 10, the sealing cover 20 is installed on the top of the carrier 10 and seals the flat grinding chamber 11; a pair of telescopic rods 70 are located on both sides of the carrier 10, and the support plate 50 is installed on the telescopic rods 70. The output end of the rod 70; the flat grinding device 40 and the flat grinding drive device 60 are installed on the support plate 50, and the output end of the flat grinding device 40 passes through the sealing cover 20 and extends into the flat grinding chamber 11; the first heating plate 90 is installed at the bottom end of the flat grinding chamber 11, and the flat grinding chamber 11 has an air inlet 111 and an air outlet 112 on both sides, the air inlet device 30 is connected to the air inlet 111, and the exhaust device is connected to the air outlet 112, the exhaust device, the carbon dioxide collection pipe 100, the first electromagnetic three-way valve 120 and the mass spectrometer 130 are connected in sequence, and the carbon dioxide collection pipe 100 is located in the liquid nitrogen cup 110.

[0034] The telescopic rod 70 contracts, driving the output end of the flat grinding device 40 to move downward in the flat grinding chamber 11 to contact the inclusion sample, and the flat grinding drive device 60 drives the flat grinding device 40 to rotate, thereby realizing flat grinding of the inclusion. Since it is only contact but not grinding, the gas adsorbed on the surface of the inclusion can be fully released without releasing the gas inside the inclusion.

[0035] In a preferred embodiment, the flat grinding device 40 includes a flat grinding plate 41, a vertical rod 42 and a second gear 43, and the flat grinding drive device 60 includes a first motor 61 and a first gear 62. The vertical rod 42 is fixed to the top end of the flat grinding plate 41, and the flat grinding plate 41 is located in the flat grinding chamber 11; the vertical rod 42 passes through the sealing cover 20 and the support plate 50, and is rotatably connected to the sealing cover 20 and the support plate 50; the second gear 43 is installed at the top end of the vertical rod 42, the first motor 61 is installed on the support plate 50, and the first gear 62 is installed at the output end of the first motor 61, and the first gear 62 is meshed with the second gear 43.

[0036] In a preferred embodiment, a plurality of flat grinding chambers 11 are arranged on the carrier 10, and an air inlet 111 and an air outlet 112 are arranged on both sides of each flat grinding chamber 11. A plurality of air inlet devices 30 and flat grinding devices 40 are arranged, and the number of air inlet devices 30 and flat grinding devices 40 is the same as the number of air inlet ports 111. The plurality of air inlet devices 30 are respectively connected to the air inlet ports 111, and the exhaust device is simultaneously connected to the plurality of air outlet ports 112; the first motor 61 is located at one end of the support plate 50, and the first gear 62 at the top of the first motor 61 is meshed with the second gear 43 in the adjacent flat grinding device 40, and the second gears 43 in the plurality of flat grinding devices 40 are meshed in sequence. The plurality of flat grinding chambers 11 are flat-ground at the same time, thereby increasing the amount of carbon dioxide collected.

[0037] In a preferred embodiment, the air intake device 30 includes an air intake pipe 31 and a first solenoid valve 32 . The first solenoid valve 32 is installed in the air intake pipe 31 . The air intake pipe 31 is connected to the air intake port 111 .

[0038] In a preferred embodiment, the exhaust device includes multiple gas processing devices 81 and a gas collection pipe 82, the number of the multiple gas processing devices 81 is the same as the number of the gas outlets 112, the gas processing device 81 includes a first gas outlet pipe 811, a second electromagnetic three-way valve 812, a second gas outlet pipe 813, a third gas outlet pipe 814, a first gas processing well 815 and a second gas processing well 816, one end of the first gas outlet pipe 811 is connected to the gas outlet 112, and the other end is connected to the second electromagnetic three-way valve 812, the second gas outlet pipe 813 and the third gas outlet pipe 814 are respectively connected to the two output ends of the second electromagnetic three-way valve 812, the first gas processing well 815 is installed on the second gas outlet pipe 813, the second gas processing well 816 is installed on the third gas outlet pipe 814, and the multiple third gas outlet pipes 814 are all connected to the gas collection pipe 82, and the gas collection pipe 82 is connected to the carbon dioxide collection pipe 100.

[0039] In a preferred embodiment, a carbon isotope analysis system for carbon dioxide in inclusions also includes a second heating plate 140, which is installed at the bottom end of the flat grinding plate 41. The first heating plate 90 and the second heating plate 140 simultaneously heat the top and bottom surfaces of the inclusion sample at high temperatures until the inclusion bursts and releases the gas in the inclusion, thereby improving the efficiency of the inclusion bursting.

[0040] Example 2

[0041] A method for using a carbon isotope analysis system for carbon dioxide in inclusions comprises the following steps:

[0042] S1. Open the sealing cover 20, and separate the flat grinding plate 41 from the flat grinding chamber 11, put an equal amount of inclusion sample in each flat grinding chamber 11, and re-enter the flat grinding chamber 11 with the sealing cover 20, and seal the flat grinding chamber 11;

[0043] S2. The telescopic rod 70 descends, causing the second heating plate 140 at the bottom of the flat grinding plate 41 to descend until it contacts the sample without generating pressure, and drives the first motor 61, which transmits through the meshing between the first gear 62 and the second gear 43, and the plurality of second gears 43, so that the second heating plate 140 in each flat grinding chamber 11 flat grinds the inclusion sample;

[0044] S3. After grinding for a period of time, the first electromagnetic valve 32 is opened to introduce helium into the grinding chamber 11, and the passage between the second electromagnetic three-way valve 812 and the second gas outlet pipe 813 is opened; the gas on the surface of the inclusion sample is fully released, and the excess air in the equipment is discharged, and the harmful gas is treated by the first gas treatment trap 815 and then discharged into the air;

[0045] S4. After a period of time, the passage between the second electromagnetic three-way valve 812 and the second gas outlet pipe 813 is closed, and the passage between the second electromagnetic three-way valve 812 and the third gas outlet pipe 814 is opened, and helium is introduced into the second processing well 816, the gas collection pipe 82 and the carbon dioxide collection pipe 100 for emptying treatment, and then discharged into the air through the first electromagnetic three-way valve 120;

[0046] S5. Close the first solenoid valve 32 and the second solenoid three-way valve 812, and energize the first heating plate 90 and the second heating plate 140 for heating, and heat the top and bottom surfaces of the inclusions at high temperatures until the inclusions burst and release the gas in the inclusions;

[0047] S6. The passages of the first electromagnetic valve 32, the second electromagnetic three-way valve 812 and the third gas outlet pipe 814 are opened, and helium is introduced to treat the water vapor in the air in the inclusion body when the air passes through the second processing trap 816, and then enters the carbon dioxide collection pipe 100 after being collected in the gas collection pipe 82, and liquid nitrogen is introduced into the liquid nitrogen cup 110, and the collected carbon dioxide is solidified under low temperature environment, and other gases are discharged into the air through the first electromagnetic three-way valve 120;

[0048] S7. Remove the liquid nitrogen cup 110 and continue to introduce helium gas. The solidified carbon dioxide sublimates and turns back into gas. The gas passes through the first electromagnetic three-way valve 120 and enters the mass spectrometer 130 for isotope analysis and determination.

[0049] The above is only a specific embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

[0050] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0051] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon isotope analysis system for carbon dioxide in inclusions, characterized in that: include: A carrier (10), a sealing cover (20), an air intake device (30), a flat grinding device (40), a support plate (50), a flat grinding drive device (60), a telescopic rod (70), an exhaust device, a first heating plate (90), a carbon dioxide collection pipe (100), a liquid nitrogen cup (110), a first electromagnetic three-way valve (120) and a mass spectrometer (130); a flat grinding chamber (11) is provided on the carrier (10); the sealing cover (20) is mounted on the top of the carrier (10) and seals the flat grinding chamber (11); a pair of telescopic rods (70) are located on both sides of the carrier (10); the support plate (50) is mounted on the output end of the telescopic rod (70); the flat grinding device (40) and the flat grinding drive device (60) are The device (60) is installed on the support plate (50), and the output end of the flat grinding device (40) passes through the sealing cover (20) and extends into the flat grinding chamber (11); the first heating plate (90) is installed at the bottom end of the flat grinding chamber (11); the flat grinding chamber (11) has an air inlet (111) and an air outlet (112) on both sides; the air inlet device (30) is connected to the air inlet (111); the exhaust device is connected to the air outlet (112); the exhaust device, the carbon dioxide collection pipe (100), the first electromagnetic three-way valve (120) and the mass spectrometer (130) are connected in sequence; and the carbon dioxide collection pipe (100) is located in the liquid nitrogen cup (110); The exhaust device comprises a plurality of gas processing devices (81) and a gas collecting pipe (82); the number of the plurality of gas processing devices (81) is the same as the number of the gas outlets (112); the gas processing device (81) comprises a first gas outlet pipe (811), a second electromagnetic three-way valve (812), a second gas outlet pipe (813), a third gas outlet pipe (814), a first gas processing well (815) and a second gas processing well (816); one end of the first gas outlet pipe (811) is connected to the gas outlet (112), and the other end is connected to the first gas outlet pipe (815). The second electromagnetic three-way valve (812) is connected to the second electromagnetic three-way valve (812), the second gas outlet pipe (813) and the third gas outlet pipe (814) are respectively connected to the two output ends of the second electromagnetic three-way valve (812), the first gas processing trap (815) is installed on the second gas outlet pipe (813), the second gas processing trap (816) is installed on the third gas outlet pipe (814), and the plurality of third gas outlet pipes (814) are all connected to the gas collection pipe (82), and the gas collection pipe (82) is connected to the carbon dioxide collection pipe (100).

2. The carbon isotope analysis system for carbon dioxide in inclusions according to claim 1, characterized in that: The flat grinding device (40) comprises a flat grinding plate (41), a vertical rod (42) and a second gear (43); the flat grinding drive device (60) comprises a first motor (61) and a first gear (62); the vertical rod (42) is fixed to the top end of the flat grinding plate (41); the flat grinding plate (41) is located in the flat grinding chamber (11); the vertical rod (42) passes through the sealing cover (20) and the support plate (50) and is rotatably connected to the sealing cover (20) and the support plate (50); the second gear (43) is mounted on the top end of the vertical rod (42); the first motor (61) is mounted on the support plate (50); the first gear (62) is mounted on the output end of the first motor (61); and the first gear (62) is meshed with the second gear (43).

3. The carbon isotope analysis system for carbon dioxide in inclusions according to claim 2, characterized in that: The carrier (10) is provided with a plurality of flat grinding chambers (11), each of the flat grinding chambers (11) being provided with an air inlet (111) and an air outlet (112) on both sides, the air inlet device (30) and the flat grinding device (40) being provided in plurality, the number of the air inlet device (30) and the number of the flat grinding device (40) being the same as the number of the air inlet (111), the plurality of air inlet devices (30) being communicated with the air inlet (111) respectively, and the exhaust device being communicated with the plurality of air outlets (112) at the same time; the first motor (61) being located at one end of the support plate (50), the first gear (62) at the top end of the first motor (61) being meshed with the second gear (43) in the adjacent flat grinding device (40), and the second gears (43) in the plurality of flat grinding devices (40) being meshed in sequence.

4. The carbon isotope analysis system for carbon dioxide in inclusions according to claim 1, characterized in that: The air intake device (30) comprises an air intake pipe (31) and a first solenoid valve (32); the first solenoid valve (32) is installed in the air intake pipe (31); and the air intake pipe (31) is in communication with the air intake port (111).

5. The carbon isotope analysis system for carbon dioxide in inclusions according to claim 2, characterized in that: It also includes a second heating plate (140), wherein the second heating plate (140) is installed at the bottom end of the flat grinding plate (41).

6. A method for using a carbon isotope analysis system for carbon dioxide in inclusions, characterized in that: The steps include: S1. Open the sealing cover (20), and separate the flat grinding plate (41) from the flat grinding chamber (11), put an equal amount of inclusion sample in each flat grinding chamber (11), re-enter the flat grinding chamber (11) with the sealing cover (20), and seal the flat grinding chamber (11); S2. The telescopic rod (70) is lowered, so that the second heating plate (140) at the bottom end of the flat grinding plate (41) is lowered until it contacts the sample without generating pressure, and the first motor (61) is driven to perform flat grinding of the inclusion sample by the second heating plate (140) in each flat grinding chamber (11) through the meshing transmission between the first gear (62) and the second gear (43), and the plurality of second gears (43); S3. After grinding for a period of time, the first electromagnetic valve (32) is opened to introduce helium into the grinding chamber (11), and the passage between the second electromagnetic three-way valve (812) and the second gas outlet pipe (813) is opened at the same time; the gas on the surface of the inclusion sample is fully released, and the excess air in the equipment is discharged, and the harmful gas is treated by the first gas treatment trap (815) and then discharged into the air; S4. After a period of time, the passage between the second electromagnetic three-way valve (812) and the second gas outlet pipe (813) is closed, and the passage between the second electromagnetic three-way valve (812) and the third gas outlet pipe (814) is opened, and helium is introduced to the second processing well (816), the gas collection pipe (82) and the carbon dioxide collection pipe (100) for evacuation, and then discharged into the air through the first electromagnetic three-way valve (120); S5. The first electromagnetic valve (32) and the second electromagnetic three-way valve (812) are closed, and the first heating plate (90) and the second heating plate (140) are powered on for heating, and the top surface and the ground surface of the inclusion are heated at high temperature at the same time, until the inclusion bursts and the gas in the inclusion is released; S6. Open the passages of the first electromagnetic valve (32), the second electromagnetic three-way valve (812) and the third gas outlet pipe (814), introduce helium gas to treat the water vapor in the air in the inclusion body when the air passes through the second treatment trap (816), collect the air in the gas collection pipe (82) and then enter the carbon dioxide collection pipe (100), introduce liquid nitrogen into the liquid nitrogen cup (110), and the collected carbon dioxide solidifies under low temperature environment, and other gases are discharged into the air through the first electromagnetic three-way valve (120); S7. Remove the liquid nitrogen cup (110), continue to introduce helium, and the solidified carbon dioxide sublimates and turns back into gas, which enters the mass spectrometer (130) through the first electromagnetic three-way valve (120) for isotope analysis and determination.

Images