Sealing device for organic element analysis of air sensitive sample

Abstract

The invention discloses a sealing device for organic element analysis of an air sensitive sample, the sealing device comprises a shell, a sample holder and a clamping mechanism, the top end of the sample holder is provided with a plurality of sample placing grooves which are sequentially arranged along the length direction of the sample holder, the clamping mechanism comprises a driving assembly and two clamping plates, the two clamping plates are connected with the driving assembly, and the driving assembly is connected with the sample placing grooves. The driving assembly is installed on the shell and comprises a torque wrench, a screw rod and two sliding blocks, the screw rod is arranged in the shell and rotationally connected with the shell, and a rotating connector is fixed to one end of the screw rod; and the torque wrench drives the rotary joint to drive the screw rod to rotate so as to drive the two clamping plates to move close to or far away from each other so as to simultaneously clamp and seal all tin cup openings on the sample rack. A plurality of tin cups can be placed on the designed sample rack at a time and sealed at the same time, the sample preparation efficiency is improved, the torque of the torque wrench can be adjusted according to the actual sealing effect, the needed sealing effect is achieved, and the aim of quantizing the sealing effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of air-sensitive sample detection, in particular to a sealing device used for organic element analysis of air-sensitive samples. Background Art

[0002] Air-sensitive samples for organic element analysis usually need to be sealed in a glove box first, and then removed from the glove box for testing in an atmospheric environment to ensure that the sample is completely isolated from the air to avoid deterioration. Therefore, whether it can be completely sealed is crucial for the detection of air-sensitive samples and is the basis for accurate analysis.

[0003] The existing sealing device is large in size (the operating handle is long and the sealing device body is large), which makes it inconvenient to enter and exit the glove box. It can only seal one sample at a time, and air-sensitive samples need to be made in multiple parallel samples, so the sample preparation efficiency is very low. In addition, multiple operations are prone to contamination. After contamination, the entire device needs to be disassembled and cleaned, which is inconvenient to operate. In addition, when clamping and sealing the sample, the existing sealing device does not know how much clamping force can be used to seal the sample, resulting in different clamping forces used by different people. Small force is likely to result in poor sample sealing effect, and large force is laborious.

[0004] Therefore, a new sealing device for organic element analysis of air-sensitive samples is urgently needed to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the following problems: first, the existing sealing device is large in size, it is inconvenient to enter and exit the glove box, can only seal one sample at a time, the sample preparation efficiency is low, and multiple operations are prone to contamination. After contamination, the entire device needs to be disassembled and cleaned, which is inconvenient to operate; second, when the existing sealing device clamps and seals the sample, it is unclear what clamping force can be used to seal the sample, resulting in different clamping forces used by different people. A small force can easily lead to poor sample sealing effect, while a large force leads to laboriousness.

[0006] To this end, the present invention provides a sealing device for organic element analysis of air-sensitive samples, comprising a shell, a sample rack mounted on the shell, and a clamping mechanism. The top of the shell is an open structure. The top of the sample rack is provided with a plurality of sample placement slots arranged in sequence along the length direction of the sample rack for placing tin cups containing samples. The sample rack is detachably connected to the shell. The clamping mechanism comprises a driving assembly and two clamping plates arranged in the shell. The two clamping plates are respectively located on both sides of the sample rack and connected to the driving assembly. The driving assembly is mounted on the shell and can drive the two clamping plates to move towards or away from each other so as to clamp and seal all tin cup openings on the sample rack at the same time.

[0007] In a specific embodiment of the sealing device for organic element analysis of air-sensitive samples, the driving assembly includes a torque wrench, a screw and two sliders. The screw is arranged in the shell and rotatably connected thereto. The screw is provided with two sections of threads with opposite spiral lines. Each section of the thread is threadedly connected to a slider. The two sliders are respectively located on both sides of the sample holder and can make relatively close or distant linear motions when the screw rotates. Each slider is detachably and fixedly connected to a clamping plate. One end of the screw extends through the shell to the outside and is fixed with a rotary joint that cooperates with the torque wrench. The torque wrench is used to drive the rotary joint to drive the screw to rotate.

[0008] In the above specific implementation of the sealing device for organic element analysis of air-sensitive samples, the side wall surface of the clamping plate facing the sample holder is composed of an inclined surface and a vertical surface, and the clamping plate is detachably fixed to the top of the slider by a first screw.

[0009] In a specific embodiment of the sealing device for organic element analysis of air-sensitive samples, the sealing device further comprises a handle, which is detachably fixedly connected to a side wall of the housing opposite to the rotary joint.

[0010] In a specific embodiment of the sealing device for organic element analysis of air-sensitive samples, the handle is threadedly connected to the top corner of the shell side wall to prevent the end of the shell from being lifted up by applying external force to the handle during the process of rotating the screw with a torque wrench.

[0011] In a specific embodiment of the above-mentioned sealing device for organic element analysis of air-sensitive samples, a tray is detachably connected to the shell, the tray is located below the sample rack, a groove is provided on the tray, the width of the groove is greater than the width of the sample rack, and the sample placement groove is provided on the sample rack corresponding to the groove.

[0012] In a specific embodiment of the sealing device for organic element analysis of air-sensitive samples, a first limiting member is provided on the shell, and the sample holder is clamped on the shell through the first limiting member.

[0013] In a specific embodiment of the above-mentioned sealing device for organic element analysis of air-sensitive samples, a socket is provided on one side wall of the shell, and a first slot is provided on the side wall of the shell opposite to the socket, one end of the sample holder can pass through the socket and be inserted into the first slot, the first limit member is located on the outside of the shell and is rotatably connected to the side wall of the shell where the socket is provided, and the first limit member can block the sample holder during rotation to limit the movement of the sample holder relative to the socket toward the outside of the shell.

[0014] In a specific embodiment of the sealing device for organic element analysis of air-sensitive samples, a second limiting member is provided on the shell, and the tray is clamped on the shell through the second limiting member.

[0015] In a specific embodiment of the sealing device for organic element analysis of air-sensitive samples, a socket is provided on the side wall of the shell opposite to the socket, and a second slot is provided on the inner side of the side wall of the shell opposite to the socket, one end of the tray can pass through the socket and be inserted into the second slot, the second limit member is located on the outside of the shell and is rotatably connected to the side wall of the shell where the socket is provided, and the second limit member can block the tray during rotation to limit the movement of the tray relative to the socket toward the outside of the shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The sample rack designed in the present invention can hold multiple tin cups at a time and seal them at the same time, which improves the sample preparation efficiency. The sample rack and the shell are designed to be detachable, so different sample racks can be replaced when testing different samples, avoiding mutual contamination between different samples caused by repeated use of the same sample rack. The sealing device designed in the present invention has a compact overall structure and a small size, and can be put in and out from the small door of the glove box, which is easy to operate.

[0017] 2. A detachable tray is set under the sample rack. The spilled samples can fall directly onto the tray to avoid falling into the shell or even on the screw. When cleaning, you only need to remove the tray from the side and clean it separately without disassembling the entire device, which is more convenient to use.

[0018] 3. The present invention sets a rotary joint at the end of the screw for cooperating with a torque wrench. When sealing, the screw is rotated by operating the torque wrench to drive the two clamping plates to move closer to each other to achieve clamping and sealing. The operation is relatively labor-saving. The torque of the torque wrench can be adjusted according to the actual sealing effect until a satisfactory sealing effect is achieved. After the torque of the torque wrench is adjusted according to the satisfactory sealing effect, each time the sealing reaches the torque, it indicates that the sealing is completed, thereby achieving the purpose of quantifying the sealing effect. There is no need to use greater force for sealing and avoid the problem of poor sealing effect due to insufficient force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the sealing device for organic element analysis of air-sensitive samples provided by the present invention; Figure 2 This is a schematic diagram of the overall structure of the sealing device for organic element analysis of air-sensitive samples provided by the present invention from another angle; Figure 3 It is a schematic diagram of the internal structure of the sealing device for organic element analysis of air-sensitive samples provided by the present invention; Figure 4 It is a schematic diagram of the positional relationship between the tray and the sample rack; Figure 5 It is a schematic diagram of the overall structure of a sealing device for organic element analysis of air-sensitive samples equipped with a handle; Figure 6 yes Figure 5 A schematic diagram of the structure from another angle; Figure 7 is a structural schematic diagram of the first limit block; Figure 8 It is a structural schematic diagram in which the first notch is designed to be U-shaped.

[0020] List of reference numerals: 1. Shell; 2. Sample rack; 201. Sample placement slot; 3. Clamping plate; 4. Tray; 41. Groove; 5. Second limit block; 6. Rotary joint; 7. First limit block; 8. First slot; 9. Socket; 10. Screw; 11. Tin cup; 12. Slider; 13. First notch; 14. Second notch; 15. Socket; 16. First screw; 17. Handle; 18. Threaded hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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 making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used to define components, only for the convenience of distinguishing the above components, and unless otherwise stated, the above terms have no special meanings and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention relates to the field of air-sensitive sample detection technology, and in particular to a sealing device for organic element analysis of air-sensitive samples. The purpose is to solve the following problems: first, the existing sealing device is large in size, inconvenient to enter and exit the glove box, can only seal one sample at a time, the sample preparation efficiency is low, and multiple operations are prone to contamination. After contamination, the entire device needs to be disassembled and cleaned, which is inconvenient to operate; second, when the existing sealing device clamps and seals the sample, it is unclear how much clamping force can be used to seal the sample, resulting in different clamping forces used by different people. A small force is likely to result in poor sample sealing effect, and a large force results in laboriousness. To this end, the present invention provides a sealing device for organic element analysis of air-sensitive samples, comprising a shell, a sample rack mounted on the shell, and a clamping mechanism. The top of the shell is an open structure. The top of the sample rack is provided with a plurality of sample placement slots arranged in sequence along the length direction of the sample rack for placing tin cups containing samples. The sample rack is detachably connected to the shell. The clamping mechanism comprises a driving component and two clamping plates arranged in the shell. The two clamping plates are respectively located on both sides of the sample rack and are connected to the driving component. The driving component is mounted on the shell and can drive the two clamping plates to move towards or away from each other so as to clamp and seal all tin cup openings on the sample rack at the same time. Multiple tin cups can be placed on the sample rack designed by the present invention at one time and sealed at the same time, thereby improving the sample preparation efficiency. The torque of the torque wrench can be adjusted according to the actual sealing effect until a satisfactory sealing effect is achieved. After the torque of the torque wrench is adjusted according to the satisfactory sealing effect, each time the sealing reaches the torque, it indicates that the sealing is completed, thereby achieving the purpose of quantifying the sealing effect. There is no need to use greater force for sealing and avoid the problem of poor sealing effect caused by insufficient force.

[0025] The sealing device for organic element analysis of air-sensitive samples provided by an embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] See also Figure 1-3The present invention provides a sealing device for organic element analysis of air-sensitive samples, comprising a shell 1, a sample rack 2 installed on the shell 1, and a clamping mechanism. The top of the shell 1 is an open structure. The top of the sample rack 2 is provided with a plurality of sample placement slots 201 arranged in sequence along the length direction of the sample rack 2 for placing tin cups containing samples. The sample rack 2 is detachably connected to the shell 1. The clamping mechanism comprises a driving component and two clamping plates 3 arranged in the shell 1. The two clamping plates 3 are respectively located on both sides of the sample rack 2 and connected to the driving component. The driving component is installed on the shell 1 and can drive the two clamping plates 3 to move closer to or away from each other so as to clamp and seal all the openings of the tin cups 11 on the sample rack 2 at the same time.

[0027] Specifically, the housing 1 includes four side mounting plates, which are detachably fixedly connected to each other to form a housing 1 having a rectangular inner cavity. For example, the size of the housing 1 is 8 cm×7 cm×5 cm, and the overall structure is compact and small in size, and the housing can be entered and exited from the small door of the glove box, which is convenient for operation. In addition, since the housing 1 can be disassembled as a whole, it is convenient to clean the whole after long-term use.

[0028] In the present application, the sample placement slot 201 is used to place the tin cup 11, and the sample is placed in the tin cup 11. The number of the sample placement slots 201 is flexibly set according to the design requirements. Preferably, the number of the sample placement slots 201 is eight.

[0029] In one embodiment, see Figure 1 , Figure 3-4 A tray 4 is detachably connected to the shell 1, and the tray 4 is located below the sample rack 2. The width of the tray 4 is greater than the width of the sample rack 2, so that when leakage occurs during the process of adding the sample to the tin cup 11, it can fall on the tray 4. When cleaning, only the tray 4 needs to be cleaned without disassembling the entire device.

[0030] Specifically, the tray 4 is provided with a groove 41, the width of which is greater than the width of the sample rack 2, and the sample placement groove 201 is provided on the sample rack 2 corresponding to the groove 41. During the process of adding the sample, the sample that is spilled falls into the groove 41, and when the tray 4 is disassembled, the sample can be prevented from falling into the housing 1, and the groove 41 plays a blocking role.

[0031] In one embodiment, a first limiting member is disposed on the housing 1 , and the sample holder 2 is clamped on the housing 1 through the first limiting member.

[0032] In the specific implementation mode, see Figure 2-3A socket 9 is provided on one side wall of the shell 1, and a first slot 8 is provided on the side wall of the shell 1 opposite to the socket 9. One end of the sample holder 2 can pass through the socket 9 and be inserted into the first slot 8. The first limiter is located on the outside of the shell 1 and is rotatably connected to the side wall of the shell 1 where the socket 9 is provided. During the rotation process, the first limiter can block the sample holder 2 to limit the movement of the sample holder 2 relative to the socket 9 toward the outside of the shell 1.

[0033] Specifically, the socket 9 can be a U-shaped structure. The first limiting member includes a first limiting block 7 and a first rotating shaft. The first rotating shaft is rotatably connected to the side wall of the housing 1 through a damping bearing. The first limiting block 7 is fixedly connected to the first rotating shaft. A first notch 13 is provided at the top of the first limiting block 7. In this way, during the rotation of the first limiting block 7, the end of the sample holder 2 can be inserted into the first notch 13 to block it, thereby playing a limiting role. Figure 2 and Figure 7 As shown, the first notch can prevent the sample holder 2 from moving relative to the insertion opening 9 along its length direction. Of course, the first notch 13 can also be designed as a U-shape, such as Figure 8 As shown, this can limit the displacement of the sample rack 2 in the length direction and the height direction. When installing the sample rack 2, the sample rack 2 is inserted into the socket 9, and then one end of the sample rack 2 is pushed into the first slot 8, and then the first limit block 7 is rotated to insert the end of the sample rack 2 into the first notch to achieve the function of blocking the sample rack 2.

[0034] In one embodiment, a second limiting member is provided on the housing 1 , and the tray 4 is clamped on the housing 1 through the second limiting member.

[0035] In the specific implementation mode, see Figure 1 and Figure 4 A socket 15 is provided on the side wall of the shell 1 opposite to the socket 9, and a second slot is provided on the inner side of the side wall of the shell 1 opposite to the socket. One end of the tray 4 can pass through the socket and be inserted into the second slot. The second limiter is located on the outside of the shell 1 and is rotatably connected to the side wall of the shell 1 where the socket is set. During the rotation process, the second limiter can block the tray 4 to limit the movement of the tray 4 relative to the socket toward the outside of the shell 1.

[0036] Specifically, see Figure 1 The second limiting member includes a second limiting block 5 and a second rotating shaft. The second rotating shaft is rotatably connected to the side wall of the housing 1 through a damping bearing. The second limiting block 5 is fixedly connected to the second rotating shaft. A second notch 14 is provided at the top of the second limiting block 5. In this way, during the rotation of the second limiting block 5, the end of the sample holder 2 can be inserted into the second notch 14 to block it, thereby playing a limiting role. Figure 1As shown, the second notch 14 can block the tray 4 from moving relative to the insertion hole along its length direction. The second stopper 5 has the same structure as the first stopper 7. When installing the tray 4, the tray 4 is inserted into the insertion hole 15, and then one end of the tray 4 is pushed into the second slot, and then the second stopper 5 is rotated to insert the end of the tray 4 into the second notch to achieve the function of blocking the tray 4.

[0037] In the above embodiment, the sample rack 2 and the tray 4 are restricted in the housing 1 or the restriction function is canceled by rotating the first restriction block 7 and the second restriction block 5 . This operation method is simple and convenient.

[0038] In one embodiment, see Figure 3 The driving assembly includes a torque wrench, a screw 10 and two sliders 12. The screw 10 is arranged in the housing 1 and is rotatably connected thereto. The screw 10 is provided with two sections of threads with opposite spiral lines. A slider 12 is threadedly connected to each section of the thread. The two sliders 12 are respectively located on both sides of the sample holder 2 and can make relatively close or far linear motions when the screw 10 rotates. A clamping plate 3 is detachably fixedly connected to each slider 12. One end of the screw 10 extends through the housing 1 to the outside and is fixed with a rotary joint 6 that cooperates with the torque wrench. The torque wrench is used to drive the rotary joint 6 to drive the screw 10 to rotate. The rotary joint 6 cooperates with the torque wrench, so that the torque wrench can drive the rotary joint 6 to drive the screw 10 to rotate. Preferably, the cross section of the rotary joint 6 is an equihexagon.

[0039] Specifically, the side wall surface of the clamping plate 3 facing the sample holder 2 is composed of an inclined surface and a vertical surface, and the inclined surface is located above the vertical surface. The inclined surfaces of the two clamping plates 3 expand the observation space, so that it is convenient to observe the sealing condition of the tin cup 11 during the clamping and sealing process. The clamping plate 3 is detachably fixed to the top of the slider 12 by a first screw. In this way, the clamping plate 3 can be easily removed for cleaning.

[0040] In the present application, in order to ensure that the slider makes linear motion under the rotation of the screw, the length of the slider is close to the length of the inner cavity of the shell to prevent the slider from rotating with the screw. The length of the clamping plate can also be made to be close to the length of the inner cavity of the shell to prevent the slider from rotating with the screw. The gap size between the length of the clamping plate and the length of the inner cavity of the shell can be flexibly set according to actual conditions. For example, the length of the clamping plate is 1mm smaller than the length of the inner cavity of the shell. Of course, this is just an example. Other structures can also be used to achieve linear motion of the slider relative to the shell. This application does not make specific limitations and is flexibly designed according to actual requirements without deviating from the basic principles of the present invention.

[0041] In the above embodiment, when sealing, the screw 10 is rotated by operating the torque wrench to drive the two clamping plates 3 to move closer to each other to achieve sealing. The operation is relatively labor-saving, and the torque wrench is used during sealing. The torque can be adjusted according to the actual sealing effect until a satisfactory sealing effect is achieved. At this time, the torque of the torque wrench is adjusted to this torque. When the torque wrench is used next time to reach this torque value, an alarm will be sounded to remind the staff to stop and there is no need to continue to apply force, thereby achieving the purpose of quantifying the sealing effect, eliminating the need to use greater force for sealing and avoiding the problem of poor sealing effect due to insufficient force.

[0042] In one embodiment, the sealing device further comprises a handle 17 , which is detachably fixedly connected to a side wall of the housing 1 opposite to the rotary joint 6 .

[0043] For example, Figure 5-6 The handle 17 is threadedly connected to the top corner of the housing side wall so that the end of the housing is not lifted up by applying external force to the handle during the process of rotating the screw with a torque wrench. Figure 5-6 The angle end shown in the figure is the end away from the worker operating the torque wrench. In this way, when the torque wrench is used to rotate the screw, the other hand presses the handle to prevent the end of the shell away from the worker (the worker refers to the worker using the sealing device) from being lifted up.

[0044] Specifically, a threaded hole 18 is provided on the side wall of the housing 1 opposite to the rotary joint 6, and one end of the handle is inserted into the threaded hole 18 and threadedly connected thereto for fixation. The axis of the handle can be perpendicular to the side wall, or it can be at a certain angle to the side wall, such as 45°, that is, the handle is in an upward tilted state relative to the side wall of the housing, which is within the protection scope of the present application.

[0045] The specific operation of the sealing device of the present invention for sealing is as follows: after placing the sample in the tin cup 11, use a torque wrench to clamp it on the rotary joint 6, and use another hand to press the handle 17, and then use the torque wrench to drive the screw 10 to rotate, so that the two sliders 12 drive the corresponding clamping plates 3 to move closer to each other, until the two clamping plates 3 clamp the cup mouth of the tin cup 11 and achieve sealing. After the sealing is completed, the screw 10 is rotated in the opposite direction to move the two clamping plates 3 away from the sample rack 2 until the clamping plates 3 are completely separated from the sample rack 2, and then the first limit block 7 is manually rotated to separate the first notch on the first limit block 7 from the sample rack 2, and then the sample rack 2 can be pulled out of the socket 9 by pulling; if the tray 4 needs to be pulled out, just rotate the second limit block 5 to separate the second notch on the second limit block 5 from the end of the tray 4, so that the tray 4 can be pulled out from the socket to complete the disassembly operation.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing device for organic element analysis of air-sensitive samples, characterized in that: The invention comprises a shell, a sample rack installed on the shell and a clamping mechanism. The top of the shell is an open structure. The top of the sample rack is provided with a plurality of sample placement slots arranged in sequence along the length direction of the sample rack for placing tin cups containing samples. The sample rack is detachably connected in the shell. The clamping mechanism comprises a driving component and two clamping plates arranged in the shell. The two clamping plates are respectively located on both sides of the sample rack and connected to the driving component. The driving component is installed on the shell and can drive the two clamping plates to move towards or away from each other so as to clamp and seal all the tin cup openings on the sample rack at the same time.

2. The sealing device for organic element analysis of air-sensitive samples according to claim 1, characterized in that: The driving assembly includes a torque wrench, a screw and two sliders. The screw is arranged in the shell and rotatably connected thereto. The screw is provided with two sections of threads with opposite spiral lines. A slider is threadedly connected to each section of the thread. The two sliders are respectively located on both sides of the sample holder and can make relatively close or distant linear motions when the screw rotates. A clamping plate is detachably and fixedly connected to each slider. One end of the screw passes through the shell and extends to the outside and is fixed with a rotary joint that cooperates with the torque wrench. The torque wrench is used to drive the rotary joint to drive the screw to rotate.

3. The sealing device for organic element analysis of air-sensitive samples according to claim 1, characterized in that: The side wall surface of the clamping plate facing the sample rack is composed of an inclined surface and a vertical surface, and the clamping plate is detachably fixed to the top end of the sliding block by a first screw.

4. The sealing device for organic element analysis of air-sensitive samples according to claim 2, characterized in that: The sealing device further comprises a handle, which is detachably fixedly connected to a side wall of the housing opposite to the rotary joint.

5. The sealing device for organic element analysis of air-sensitive samples according to claim 4, characterized in that: The handle is threadedly connected to the top corner end of the shell side wall so that the end of the shell is not tilted by applying external force to the handle during the process of rotating the screw rod with a torque wrench.

6. The sealing device for organic element analysis of air-sensitive samples according to claim 1, characterized in that: A tray is detachably connected inside the shell, the tray is located below the sample rack, a groove is provided on the tray, the width of the groove is greater than the width of the sample rack, and the sample placement slot is arranged on the sample rack corresponding to the groove.

7. The sealing device for organic element analysis of air-sensitive samples according to claim 1, characterized in that: The shell is provided with a first limiting member, and the sample rack is clamped on the shell through the first limiting member.

8. The sealing device for organic element analysis of air-sensitive samples according to claim 7, characterized in that: A socket is provided on one side wall of the shell, and a first slot is provided on the side wall of the shell opposite to the socket. One end of the sample rack can pass through the socket and be inserted into the first slot. The first limiting member is located on the outside of the shell and is rotatably connected to the side wall of the shell where the socket is provided. During the rotation process, the first limiting member can block the sample rack to limit the movement of the sample rack relative to the socket toward the outside of the shell.

9. The sealing device for organic element analysis of air-sensitive samples according to claim 6, characterized in that: The shell is provided with a second limiting member, and the tray is clamped on the shell through the second limiting member.

10. The sealing device for organic element analysis of air-sensitive samples according to claim 9, characterized in that: A plug hole is provided on the side wall of the shell opposite to the socket, and a second slot is provided on the inner side of the side wall of the shell opposite to the plug hole. One end of the tray can pass through the plug hole and be inserted into the second slot. The second limit member is located on the outside of the shell and is rotatably connected to the side wall of the shell where the plug hole is provided. During the rotation process, the second limit member can block the tray to limit the tray from moving toward the outside of the shell relative to the plug hole.

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