Sample reaction transfer device for air sensitive sample

Abstract

The invention relates to a sample reaction transfer device for air sensitive samples, which comprises a base, a gas buffer chamber and a plurality of sample chambers, the gas buffer chamber and the sample chambers are arranged on the base, the sample chambers are detachably connected with the upper surface of the base, and laser transmitters are arranged in the sample chambers and used for performing interface reaction experiments on the samples; each sample chamber is communicated with a gas buffer chamber through a breather pipe, gas in the gas buffer chamber and the sample chambers is pumped out through a gas outlet end of the gas buffer chamber, and samples are prevented from being in contact with air; a plurality of movable sealing mechanisms are arranged in the gas buffer chamber, the movable sealing mechanisms are in one-to-one correspondence with the sample chambers, each movable sealing mechanism comprises a pusher and a telescopic gas blocking part, and the pusher pushes the gas blocking parts to stretch out and draw back so as to block or open the corresponding ventilation pipes, so that the gas buffer chamber is disconnected from or recovered from the corresponding sample chambers.

Description

Technical Field

[0001] The invention belongs to the technical field of reaction characterization of air-sensitive samples, and particularly relates to a sample reaction transfer device for air-sensitive samples. Background Art

[0002] With the development of technologies in the fields of new energy batteries, energy catalytic conversion, etc., the development of new materials in these fields is inseparable from interfacial reactions. Therefore, accurate analysis of interfacial reaction mechanisms plays a key role in improving energy utilization. Time-of-flight secondary ion mass spectrometry (TOF-SIMS) can detect the surface chemical information of samples and is the main technical means to study the deep-seated mechanism of interfacial reactions. In the energy field, most new materials cannot be exposed to air. For example, lithium metal and ternary positive electrodes produce surface residual alkali after contact with air, and commercial Pt catalysts will be poisoned by oxygen and carbon monoxide.

[0003] Currently, many operations on air-sensitive materials can be completed in a glove box, but the large TOF-SIMS instrument cannot be placed in a glove box. This requires the development of some devices to transfer air-sensitive materials to the TOF-SIMS detection chamber. Summary of the Invention

[0004] To address the above issues, the present invention provides a sample reaction transfer device for air-sensitive samples, comprising a base, a gas buffer chamber on the base, and several sample chambers. The sample chambers are detachably connected to the upper surface of the base. Laser emitters are provided inside the sample chambers for performing interfacial reaction experiments on the samples. Each sample chamber is connected to the gas buffer chamber via a vent tube. Gas in the gas buffer chamber and the sample chamber is extracted through the gas outlet of the gas buffer chamber to prevent the sample from contacting the air.

[0005] The gas buffer chamber is provided with several movable sealing mechanisms, which correspond to the sample chambers one by one. The movable sealing mechanisms include a pusher and a retractable gas blocking component. The pusher pushes the gas blocking component to retract or block the corresponding vent pipe, so that the gas buffer chamber is disconnected from or restored to the corresponding sample chamber.

[0006] In the present invention, a material sample is placed in a sample chamber. When the sample chamber is tightly connected to the base, the sample chamber is isolated from the outside world, and the sample can be irradiated by laser, thereby causing an interfacial reaction. By pumping air at the outlet end of the gas buffer chamber, the air in the gas buffer chamber and the sample chamber can be pumped out to prevent the sample from coming into contact with the air. The movable sealing mechanism can temporarily cut off the connection between the temporarily unused sample chamber and the gas buffer chamber. The device provided by the present invention has a simple structure, greatly reduces the assembly process, and reduces costs.

[0007] Optionally, the interior of the sample chamber is hollow and the bottom is open. The bottom of the sample chamber is provided with a circle of ledges protruding and extending outward, and a plurality of threaded holes are evenly arranged on the ledges for connecting with corresponding threaded holes on the base by screws, thereby fixing the sample chamber;

[0008] A laser emitter is installed on the top surface of the sample chamber, which can emit laser light to the sample below, prompting an interfacial reaction on the sample surface;

[0009] A vent pipe is welded on the side of the sample chamber facing the gas buffer chamber for communicating with the gas buffer chamber.

[0010] Further optionally, a first sealing groove is provided on the bottom surface of the overlapped edge of the sample chamber, and a sealing ring is placed in the first sealing groove. When the overlapped edge and the base are connected by screws, the sealing ring plays a sealing role.

[0011] Optionally, the gas buffer chamber is in a flat cylindrical or square shape, and the sides of the gas buffer chamber are welded or threadedly connected to the various vent pipes, and the various vent pipes are evenly arranged along the circumference of the gas buffer chamber;

[0012] The side of the gas buffer chamber that is not provided with a vent pipe is a gas outlet end, which is used to discharge the gas input from each sample chamber.

[0013] Further optionally, the top surface of the gas buffer chamber is provided with a plurality of through holes, and the vertical rod of the pusher passes through the corresponding through holes and out of the gas buffer chamber, so as to facilitate the control of the extension and contraction of the corresponding gas blocking component outside the gas buffer chamber.

[0014] Further optionally, the side of the gas buffer chamber is provided with a plurality of outwardly protruding docking tubes, and the docking tubes correspond to the vent pipes one by one; the docking tubes are hollow cylindrical, and their center lines are arranged horizontally, and the docking tubes point to the outside of the gas buffer chamber;

[0015] The end of the docking tube warehouse connected to the gas buffer chamber is the rear end, and the end connected to the ventilation pipe is the front end; the rear end of the docking tube warehouse is provided with a circle of first support walls, and the front end is provided with a circle of second support walls. Both support walls are circular and concentric with the docking tube warehouse. The first support wall and the second support wall both extend along the radial direction of the docking tube warehouse toward the center line of the docking tube warehouse; the inner circle diameter of the second support wall is smaller than the inner circle diameter of the first support wall.

[0016] Optionally, the pusher includes a vertical rod, a horizontal rod and a wedge-shaped portion, the two ends of the horizontal rod are respectively connected to the bottom of the vertical rod and the rear end of the wedge-shaped portion, the upper part of the vertical rod passes through the top surface of the gas buffer chamber, and the vertical rod is raised and lowered to drive the horizontal rod and the wedge-shaped portion to move up and down;

[0017] The front end of the wedge-shaped portion is wedge-shaped, and the side surface of the wedge-shaped portion facing the air blocking component is inclined so that the top of the side surface is away from the air blocking component and the bottom is close to the air blocking component.

[0018] Optionally, the air blocking component includes a first air blocking piece and a telescopic rod, the first air blocking piece is circular and vertically arranged, the diameter of the first air blocking piece is larger than the inner circle diameter of the second support wall, a sealing gasket is provided on one side of the first air blocking piece facing the second support wall, and the other side is connected to the telescopic rod and a plurality of first springs; one end of the telescopic rod is connected to the center of the first air blocking piece, and the other end contacts the inclined side surface of the wedge-shaped portion, and the telescopic rod is a rigid rod;

[0019] A plurality of first springs are evenly arranged along the circumference of the first air blocking plate, and the first springs are connected between the first supporting wall and the first air blocking plate.

[0020] Optionally, the gas outlet end of the gas buffer chamber is detachably connected to a valve sealing mechanism for pumping gas from the sample chamber and the gas buffer chamber;

[0021] The valve sealing mechanism includes a main fixing part and a rebound part. One end of the main fixing part is connected to the gas outlet end of the gas buffer chamber, and the other end is connected to the cover plate. The rebound part is arranged inside the main fixing part. The rebound part is connected to the cover plate through several second springs, so that the rebound part can move back and forth inside the main fixing part.

[0022] Further optionally, a circular second air barrier is provided at the front end of the rebound component, the back of the second air barrier is connected to a cylindrical hollow support tube, the side of the second air barrier facing the cover is connected to one end of a second spring, and the other end of the second spring is connected to the inner side of the cover; the length of the rebound component is smaller than the length inside the main fixing component, and there is a gap between the outer wall of the support tube and the inner wall of the main fixing component to allow gas to pass through.

[0023] Further optionally, a second sealing groove is provided on the side of the second air blocking plate facing the gas buffer chamber, and a sealing ring is placed in the second sealing groove. When the second air blocking plate contacts the front end of the main fixing part, the gas buffer chamber that has been pumped into negative pressure can absorb the second air blocking plate and maintain sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the sample reaction transfer device for air-sensitive samples;

[0025] Figure 2 is a side view schematic diagram of the sample chamber;

[0026] Figure 3 It is a structural diagram of the movable closing mechanism;

[0027] Figure 4 A schematic diagram of the interior of the docking silo;

[0028] Figure 5 Schematic diagram of the valve sealing mechanism.

[0029] In the accompanying drawings, 1-base, 2-gas buffer chamber, 3-sample chamber, 4-ventilation tube, 5-pusher, 6-gas blocking component, 7-lap edge, 8-support tube, 9-cover plate, 10-vertical rod, 11-cross bar, 12-wedge-shaped portion, 13-inclined side, 14-docking tube warehouse, 15-first support wall, 16-second support wall, 17-first gas blocking plate, 18-second gas blocking plate, 19-telescopic rod, 20-first spring, 21-second spring, 22-main fixing part, 23-rebound component, 24-air outlet end. DETAILED DESCRIPTION

[0030] This embodiment provides a sample reaction transfer device for air-sensitive samples, such as Figure 1-Figure 5 As shown, it includes a base 1, a gas buffer chamber 2 on the base 1, and several sample chambers 3. The sample chambers 3 are detachably connected to the upper surface of the base 1. A laser emitter is provided inside the sample chamber 3 for performing an interfacial reaction experiment on the sample. Each sample chamber 3 is connected to the gas buffer chamber 2 through a vent pipe 4. The gas in the gas buffer chamber 2 and the sample chamber 3 is extracted through the gas outlet 24 of the gas buffer chamber 2 to prevent the sample from contacting the air.

[0031] Several movable sealing mechanisms are provided in the gas buffer chamber 2, and the movable sealing mechanisms correspond one-to-one to the sample chambers 3. The movable sealing mechanisms include a pusher 5 and a retractable gas blocking component 6. The pusher 5 pushes the gas blocking component 6 to retract or block or open the corresponding vent tube 4, so that the gas buffer chamber 2 is disconnected from or restored to the corresponding sample chamber 3.

[0032] Optionally, the interior of the sample chamber 3 is hollow and the bottom is open. The bottom of the sample chamber 3 is provided with a circle of outwardly protruding edge 7, and a plurality of threaded holes are evenly provided on the edge 7 for connecting with corresponding threaded holes on the base 1 by screws, thereby fixing the sample chamber 3;

[0033] A laser emitter is installed on the top surface of the sample chamber 3, which can emit laser light to the sample below, prompting an interface reaction to occur on the sample surface;

[0034] A vent pipe 4 is welded to the side of the sample chamber 3 facing the gas buffer chamber 2 for communicating with the gas buffer chamber 2 .

[0035] Further optionally, the sample chamber 3 is made of stainless steel and is preferably in a cubic shape; a wire hole is provided on the top surface of the sample chamber 3, and the line of the laser emitter passes through the sample chamber 3 through the wire hole, and the wire hole is sealed to avoid air leakage.

[0036] Further optionally, a first sealing groove is provided on the bottom surface of the overlap 7 of the sample chamber 3 , and a sealing ring is placed in the first sealing groove. When the overlap 7 is connected to the base 1 by screws, the sealing ring plays a sealing role.

[0037] Optionally, the gas buffer chamber 2 is a flat cylindrical or square shape, and the side of the gas buffer chamber 2 is welded or threadedly connected to each vent tube 4 to ensure an airtight connection between the gas buffer chamber 2 and each sample chamber 3; each vent tube 4 is evenly arranged along the circumference of the gas buffer chamber 2, that is, the sample chamber 3 is evenly arranged outside the gas buffer chamber 2 around the circumference of the gas buffer chamber 2, and the vent tube 4 is a rigid, straight, hollow cylindrical tube;

[0038] The side of the gas buffer chamber 2 where the vent pipe 4 is not provided is a gas outlet 24 for discharging the gas input from each sample chamber 3 .

[0039] Further optionally, the top surface of the gas buffer chamber 2 is provided with a plurality of through holes, and the vertical rod 10 of the pusher 5 passes through the gas buffer chamber 2 through the corresponding through holes, so as to facilitate the control of the expansion and contraction of the corresponding gas blocking component 6 outside the gas buffer chamber 2. Each through hole is sealed to prevent air leakage.

[0040] Further optionally, the side of the gas buffer chamber 2 is provided with a plurality of outwardly protruding docking tubes 14, and the docking tubes 14 correspond one to one with the vent pipes 4; the docking tubes 14 are hollow cylindrical, and their center lines are arranged horizontally, and the docking tubes 14 point to the outside of the gas buffer chamber 2;

[0041] The end of the docking tube warehouse 14 connected to the gas buffer chamber 2 is the rear end, and the end connected to the ventilation pipe 4 is the front end; the rear end of the docking tube warehouse 14 is provided with a circle of first support wall 15, and the front end is provided with a circle of second support wall 16. Both support walls are circular and concentric with the docking tube warehouse 14. The first support wall 15 and the second support wall 16 both extend along the radial direction of the docking tube warehouse 14 toward the center line of the docking tube warehouse 14; the inner circle diameter of the second support wall 16 is smaller than the inner circle diameter of the first support wall 15.

[0042] Optionally, the pusher 5 includes a vertical rod 10, a horizontal rod 11 and a wedge-shaped portion 12, the two ends of the horizontal rod 11 are respectively connected to the bottom of the vertical rod 10 and the rear end of the wedge-shaped portion 12, the upper part of the vertical rod 10 passes through the top surface of the gas buffer chamber 2, and the vertical rod 10 is lifted and lowered to drive the horizontal rod 11 and the wedge-shaped portion 12 to move up and down;

[0043] The front end of the wedge-shaped portion 12 is wedge-shaped, and the side of the wedge-shaped portion 12 facing the gas blocking component 6 is inclined, so that the top of the side is away from the gas blocking component 6 and the bottom is close to the gas blocking component 6; when the wedge-shaped portion 12 rises, its inclined side surface 13 rises, pushing the gas blocking component 6 to move toward the front end of the docking tube warehouse 14; when the wedge-shaped portion 12 falls, its inclined side surface 13 falls, and the gas blocking component 6 moves toward the rear end of the docking tube warehouse 14, thereby realizing that the gas blocking component 6 blocks or connects the corresponding sample chamber 3 and the gas buffer chamber 2.

[0044] Optionally, the air blocking component 6 includes a first air blocking piece 17 and a telescopic rod 19. The first air blocking piece 17 is circular and vertically arranged. The diameter of the first air blocking piece 17 is larger than the inner circle diameter of the second support wall 16. A sealing gasket is provided on one side of the first air blocking piece 17 facing the second support wall 16, and the other side is connected to the telescopic rod 19 and a plurality of first springs 20. One end of the telescopic rod 19 is connected to the center of the first air blocking piece 17, and the other end contacts the inclined side surface 13 of the wedge-shaped portion 12. The telescopic rod 19 is a rigid rod.

[0045] A plurality of first springs 20 are evenly arranged along the circumference of the first air blocking plate 17 , and the first springs 20 are connected between the first supporting wall 15 and the first air blocking plate 17 .

[0046] Multiple sample chambers 3 can meet the needs of simultaneous experiments and testing of multiple samples, improving experimental and testing efficiency. When one or more sample chambers 3 are no longer needed, the connection between the unused sample chambers 3 and the gas buffer chamber 2 should be disconnected. However, since each sample chamber 3 is rigidly connected to the gas buffer chamber 2 via a vent tube 4, it is difficult to disconnect the sample chamber 3 from the gas buffer chamber 2 without damaging the vent tube 4. The present invention provides the above-mentioned movable sealing mechanism for disconnecting or connecting the corresponding sample chamber 3 and the gas buffer chamber 2.

[0047] Specifically, when the pusher 5 is in the initial state, the wedge-shaped portion 12 and the cross bar 11 are at the bottom surface of the gas buffer chamber 2, the vertical rod 10 is retracted into the gas buffer chamber 2, and there is still a handle protruding from the top outside the gas buffer chamber 2. The rear end of the telescopic rod 19 contacts the upper and middle part of the inclined side surface 13 of the wedge-shaped portion 12, the first gas barrier 17 is between the two support walls, the first spring 20 is in a natural state, and the diameter of the first gas barrier 17 is smaller than the inner circle diameter of the first support wall 15. At this time, the docking station 14 is in an unobstructed state, and the corresponding sample chamber 3 is connected to the gas buffer chamber 2. When it is necessary to cut off the connection between the sample chamber 3 and the gas buffer chamber 2, the handle at the top of the vertical rod 10 is lifted upwards, driving the cross bar 11 and the wedge-shaped portion 12 to rise, and the inclined side 13 also rises, and the wedge-shaped portion 12 and the telescopic rod 19 move relative to each other (the telescopic rod 19 does not rise), so that the rear end of the telescopic rod 19 contacts the middle and lower part of the inclined side 13 of the wedge-shaped portion 12. Since the position of the vertical rod 10 remains unchanged (just vertical lifting), it is equivalent to pushing the telescopic rod 19 toward the second supporting wall 16, and then pushing the first air barrier 17 against the second supporting wall 16. At the same time, each first spring 20 is elongated, and the first air barrier 17 cuts off the internal path of the docking chamber 14. The ring buckle component with an opening can be used to be sleeved on the outer side of the vertical rod 10 outside the gas buffer chamber 2, and the ring buckle component is stuck between the top surface of the gas buffer chamber 2 and the handle of the vertical rod 10, thereby temporarily fixing the position of the vertical rod 10. When the pusher 5 returns to the above initial state, the first spring 20 returns to the natural state, pulling the first air blocking plate 17 back between the two supporting walls, and the docking station 14 is unblocked again.

[0048] Optionally, the gas outlet end of the gas buffer chamber 2 is detachably connected to a valve sealing mechanism for pumping gas from the sample chamber 3 and the gas buffer chamber 2;

[0049] The valve sealing mechanism includes a main fixture 22 and a resilient component 23. One end of the main fixture 22 is connected to the outlet of the gas buffer chamber 2, and the other end is connected to the cover plate 9. The resilient component 23 is located within the main fixture 22 and connected to the cover plate 9 via a number of second springs 21, allowing the resilient component 23 to move back and forth within the main fixture 22. The gas buffer chamber and the valve sealing mechanism both have bottom surfaces, forming independent chambers. They are not connected to the base, but can contact the base. The main fixture and cover plate can be square.

[0050] Optionally, the front end of the resilient component 23 is provided with a circular second air barrier 18, the rear of the second air barrier 18 being connected to a cylindrical hollow support tube 8, the side of the second air barrier 18 facing the cover plate 9 being connected to one end of a second spring 21, and the other end of the second spring 21 being connected to the inner side of the cover plate 9; the length of the resilient component 23 is shorter than the interior length of the main fixing member 22, and a gap is provided between the outer wall of the support tube 8 and the inner wall of the main fixing member 22 to allow gas to pass through. The support tube is connected to the middle of the second air barrier, and the second spring is connected to the edge of the second air barrier.

[0051] Further optionally, the gas outlet end of the gas buffer chamber 2 is provided with a first opening, and the end of the main fixing member 22 that is connected to the gas outlet end is provided with a second opening, the positions of the two openings correspond, and the size of the first opening is smaller than the second opening;

[0052] A third opening is provided at one end of the main fixing member 22 that is connected to the cover plate 9, and a fourth opening is provided on the cover plate 9. The diameter of the second gas blocking plate 18 is larger than the diameter of the third opening. When the second spring 21 pulls the rebound component 23 toward the cover plate 9, the above four openings can be connected to extract the gas in the sample chamber 3 and the gas buffer chamber 2.

[0053] The front end of the main fixing member 22 is connected to the gas outlet end of the gas buffer chamber 2 by screws, and the cover plate 9 is connected to the rear end of the main fixing member 22 by screws. Sealing pads can be set at the positions of the above two screw connections to ensure air tightness.

[0054] Further optionally, a second sealing groove is provided on the side of the second air blocking sheet 18 facing the gas buffer chamber 2, and a sealing ring is placed in the second sealing groove. When the second air blocking sheet 18 contacts the front end of the main fixing member 22, the gas buffer chamber 2 that has been evacuated to a negative pressure can absorb the second air blocking sheet 18 and maintain sealing.

[0055] The sample reaction transfer device of the present invention may be made entirely of stainless steel.

[0056] During use, first place the sample on the base 1 at the position corresponding to the sample chamber 3, buckle the sample chamber 3 over the corresponding sample, and screw the flange 7 to the base 1 to maintain the airtightness of the sample chamber 3. Then, according to the above method, use the movable sealing mechanism to seal the sample chamber 3 without the sample, while maintaining the communication between the sample chamber 3 with the gas buffer chamber 2.

[0057] The base 1 is placed in the glove box as an integral device, and an air pump or vacuum pump is connected to the fourth opening of the cover plate 9 to evacuate the air. The air in the sample chamber 3 is discharged to the second opening through the vent pipe 4 and the gas buffer chamber 2. The air pressure pushes the second air barrier 18 toward the cover plate 9, while compressing the second spring 21, so that the air continues to enter the inner space of the main fixed part 22. The gas circulates in the space between the support tube 8 and the main fixed part 22 and is then output from the fourth opening (the rear end of the support tube does not contact the cover plate). After the sample chamber 3 and the gas buffer chamber 2 are evacuated to a negative pressure, the external air pressure is higher than the internal air pressure, and the second air barrier 18 is pushed toward the gas buffer chamber 2 by the external air pressure (the second spring 21 is reset or stretched a small amount), thereby blocking the second opening. The external air pressure also presses the sample chamber 3 onto the base 1. At this time, the screws at the overlap 7 are removed, and the seal of the sample chamber 3 can still be maintained by the external air pressure. The hollow support tube can reduce the deadweight of the rebound component, making it easier for the gas to push the second air barrier.

[0058] The entire device is then moved from the glove box to the TOF-SIMS testing chamber, which is then sealed and evacuated. Because the TOF-SIMS vacuum level is much greater than the vacuum level within sample chamber 3, the internal pressure is greater than the external pressure (i.e., the pressure within the testing chamber), causing sample chamber 3 to slightly detach from base 1. A manipulator or similar device is pre-installed in the testing chamber to remove sample chamber 3 and gas buffer chamber 2 from base 1, thereby preserving the sample for testing.

Claims

1. A sample reaction transfer device for air-sensitive samples, characterized in that: The device comprises a base, a gas buffer chamber on the base, and several sample chambers. The sample chambers are detachably connected to the upper surface of the base. A laser emitter is provided inside the sample chambers for performing interfacial reaction experiments on samples. Each sample chamber is connected to the gas buffer chamber via a vent pipe. Gas in the gas buffer chamber and the sample chamber is extracted through the gas outlet of the gas buffer chamber to prevent the sample from coming into contact with air. The gas buffer chamber is provided with several movable sealing mechanisms, which correspond to the sample chambers one by one. The movable sealing mechanisms include a pusher and a retractable gas blocking component. The pusher pushes the gas blocking component to retract or block the corresponding vent pipe, so that the gas buffer chamber is disconnected from or restored to the corresponding sample chamber.

2. The sample reaction transfer device for air-sensitive samples according to claim 1, characterized in that: The interior of the sample chamber is hollow and the bottom is open; the bottom of the sample chamber is provided with a circle of outwardly protruding and extending edges, and a plurality of threaded holes are evenly arranged on the edges for connecting with corresponding threaded holes on the base by screws, thereby fixing the sample chamber; A laser emitter is installed on the top surface of the sample chamber, which can emit laser to the sample below, prompting an interfacial reaction on the sample surface; a ventilation pipe is welded on the side of the sample chamber facing the gas buffer chamber to connect to the gas buffer chamber.

3. The sample reaction transfer device for air-sensitive samples according to claim 2, characterized in that: The bottom surface of the lap side of the sample chamber is provided with a circle of first sealing grooves, in which a sealing ring is placed. When the lap side is connected to the base through screws, the sealing ring plays a sealing role.

4. The sample reaction transfer device for air-sensitive samples according to claim 1, characterized in that: The gas buffer chamber is a flat cylindrical or square shape, and the sides of the gas buffer chamber are welded or threadedly connected to the various ventilation pipes; the various ventilation pipes are evenly arranged along the circumference of the gas buffer chamber; The side of the gas buffer chamber that is not provided with a vent pipe is the gas outlet end, which is used to discharge the gas input from each sample chamber; The top surface of the gas buffer chamber is provided with a plurality of through holes, and the vertical rods of the pusher pass through the corresponding through holes and out of the gas buffer chamber, so as to facilitate the control of the expansion and contraction of the corresponding gas blocking components outside the gas buffer chamber.

5. The sample reaction transfer device for air-sensitive samples according to claim 4, characterized in that: The side of the gas buffer chamber is provided with a plurality of outwardly protruding docking tubes, which correspond one to one with the vent pipes; the docking tubes are hollow cylindrical, and their center lines are arranged horizontally, and the docking tubes point to the outside of the gas buffer chamber; The end of the docking tube warehouse connected to the gas buffer chamber is the rear end, and the end connected to the ventilation pipe is the front end; the rear end of the docking tube warehouse is provided with a circle of first support walls, and the front end is provided with a circle of second support walls. Both support walls are circular and concentric with the docking tube warehouse. The first support wall and the second support wall both extend along the radial direction of the docking tube warehouse toward the center line of the docking tube warehouse; the inner circle diameter of the second support wall is smaller than the inner circle diameter of the first support wall.

6. The sample reaction transfer device for air-sensitive samples according to claim 5, characterized in that: The pusher includes a vertical rod, a horizontal rod and a wedge-shaped portion. The two ends of the horizontal rod are respectively connected to the bottom of the vertical rod and the rear end of the wedge-shaped portion. The upper part of the vertical rod passes through the top surface of the gas buffer chamber. The vertical rod is raised and lowered to drive the horizontal rod and the wedge-shaped portion to move up and down. The front end of the wedge-shaped portion is wedge-shaped, and the side surface of the wedge-shaped portion facing the air blocking component is inclined so that the top of the side surface is away from the air blocking component and the bottom is close to the air blocking component.

7. The sample reaction transfer device for air-sensitive samples according to claim 6, characterized in that: The air blocking component includes a first air blocking piece and a telescopic rod. The first air blocking piece is circular and vertically arranged. The diameter of the first air blocking piece is larger than the inner diameter of the second support wall. A sealing gasket is provided on one side of the first air blocking piece facing the second support wall, and the other side is connected to the telescopic rod and a plurality of first springs. One end of the telescopic rod is connected to the center of the first air blocking piece, and the other end contacts the inclined side surface of the wedge-shaped portion. A plurality of first springs are evenly arranged along the circumference of the first air blocking plate, and the first springs are connected between the first supporting wall and the first air blocking plate.

8. The sample reaction transfer device for air-sensitive samples according to claim 1, characterized in that: The valve sealing mechanism includes a main fixing part and a rebound part, one end of the main fixing part is connected to the gas outlet end of the gas buffer chamber, and the other end is connected to the cover plate; the rebound part is arranged inside the main fixing part, and the rebound part is connected to the cover plate through a plurality of second springs, so that the rebound part can move back and forth inside the main fixing part.

9. The sample reaction transfer device for air-sensitive samples according to claim 8, characterized in that: A circular second air barrier is provided at the front end of the rebound component, the back of the second air barrier is connected to a cylindrical hollow support tube, the side of the second air barrier facing the cover plate is connected to one end of a second spring, and the other end of the second spring is connected to the inner side of the cover plate; the length of the rebound component is smaller than the length inside the main fixing part, and there is a gap between the outer wall of the support tube and the inner wall of the main fixing part to allow gas to pass through.

10. The sample reaction transfer device for air-sensitive samples according to claim 9, characterized in that: A circle of second sealing grooves is provided on one side of the second gas barrier sheet facing the gas buffer chamber, and a sealing ring is placed in the second sealing groove.

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