Automatic sampling device for glow discharge mass spectrometer

Abstract

The application discloses a kind of automatic sampling devices for glow discharge mass spectrometer, comprising: sample chamber and detection chamber, pneumatic valve is arranged between the sample chamber and detection chamber;Pre-positioning mechanism, the pre-positioning mechanism includes multiple groups of rotating disc and driving component;Docking mechanism, multiple groups of the rotating disc same side are provided with docking mechanism, so that rotating disc is detachably arranged with electric push rod by docking mechanism;The pre-positioning mechanism further includes fixing component, the sample is detachably arranged on the other side of rotating disc by fixing component, and the fixing component is drivingly connected with sample chamber by driving component;The mutual cooperation of sample chamber, pre-positioning mechanism, docking mechanism and photosensitive positioning sensor can effectively reduce the repeated manual operation steps in the process of GDMS analysis, improve sample test efficiency, and reduce the error caused by manual operation.

Description

Technical Field

[0001] This invention relates to sample introduction for glow discharge mass spectrometers, and more specifically, to an automatic sample introduction device for glow discharge mass spectrometers. Background Technology

[0002] Glow discharge mass spectrometry (GDMS) is currently the ideal method for quantitative analysis of trace and ultra-trace impurity elements in high-purity materials, and it has been widely used in semiconductors, target materials, advanced ceramics, rare earths, aerospace, artificial crystals, biomedicine and other fields. However, GDMS analysis is highly dependent on manual sample introduction, in which the sample is manually loaded onto the sample holder and then manually pushed into the ion source for detection.

[0003] However, existing technologies still have the following problems: In existing commercial instruments, the sample holder and ion source are directly and rigidly bonded, and the tightness of the bond varies from person to person, sometimes resulting in insufficient pushing force or a loose bond, affecting normal glow discharge. After testing, the sample holder needs to be manually dried with a heat gun or hair dryer before loading the next sample. If the sample holder is not dried enough and has water droplets or moisture, it will affect the accuracy of the sample analysis results. Furthermore, the sample analysis is conducted in a high-vacuum, low-temperature environment. After analysis, the sample needs to be removed to release the vacuum, and the sample to be analyzed needs to be evacuated and cooled. Switching between samples is time-consuming and results in low sample analysis efficiency. Therefore, we propose an automated sample introduction device for glow discharge mass spectrometers. Summary of the Invention

[0004] One object of the present invention is to provide a new technical solution for an automatic sample introduction device for a glow discharge mass spectrometer.

[0005] This invention provides an automatic sample introduction device for a glow discharge mass spectrometer, comprising:

[0006] The sample chamber and the testing chamber are connected by a pneumatic valve, which allows the sample chamber to be connected to the testing chamber. An electric push rod is provided on one side of the sample chamber.

[0007] A pre-positioning mechanism is provided, comprising multiple sets of rotating disks and a driving component. The rotating disks are detachably disposed inside the sample chamber. All sets of rotating disks are rotated inside the sample chamber via the driving component. The center of the lower rotating disk is horizontally aligned with the central axis of the electric push rod.

[0008] The docking mechanism is provided on the same side of the multiple sets of rotating disks, so that the rotating disks are detachably connected to the electric push rods through the docking mechanism.

[0009] The prepositioning mechanism also includes a fixing component, and the sample is detachably mounted on the other side of the rotating disk via the fixing component. The fixing component is connected to the sample chamber via a driving component.

[0010] Optionally, the sample chamber is composed of a sealed outer shell and a sealed inner shell. The sealed outer shell is connected to the interior of the detection chamber through a pneumatic valve. A sealing groove is provided at the upper end of the sealed outer shell. The sealed inner shell is slidably inserted into the sealing groove. A material exchange groove is provided on the outer side of the sealed inner shell. Multiple sets of rotating disks are arranged inside the material exchange groove.

[0011] Optionally, the driving component includes a servo motor, which is disposed in a sealed housing. A clearance groove is provided on one side of the sealed housing. One end of the output shaft of the servo motor passes through the clearance groove into the material changing trough. A rotating rod is fixedly installed on one end of the output shaft of the servo motor. Multiple sets of connecting brackets are fixedly installed on the outside of the rotating rod. The connecting brackets are detachably disposed from the rotating disk.

[0012] Optionally, a sliding groove is provided on one side of the connecting frame, and one end of the rotating disk is slidably installed inside the sliding groove. A fastening component is provided inside the sliding groove, so that one end of the rotating disk can be detachably installed inside the sliding groove through the fastening component.

[0013] Optionally, the fastening component includes a fastening plate, a fastening groove is provided on one side of the sliding groove, the fastening plate is slidably installed inside the fastening groove, one end of the fastening plate is inclined, a second spring is provided inside the fastening groove, a transmission bar is fixedly installed on one end of the second spring, the transmission bar is slidably installed inside the fastening groove, and the transmission bar is fixedly connected to the fastening plate.

[0014] Optionally, the docking mechanism includes an electromagnet and a magnetic plate. The magnetic plate is disposed on one side of the rotating disk. One end of the movable rod of the electric push rod is provided with a groove, and a first spring is disposed inside the groove. One end of the first spring is fixedly connected to the electromagnet. The electromagnet is slidably installed inside the groove, and the electromagnet is magnetically connected to the magnetic plate.

[0015] Optionally, the docking mechanism further includes a docking base, which is fixedly installed on one side of the rotating disk. A movable groove is provided on one side of the docking base, and the magnetic plate is slidably installed inside the movable groove. Two sets of linkage bars are fixedly installed on the outside of the magnetic plate. Both sets of linkage bars are slidably installed inside the movable groove, and the same end of both sets of linkage bars is inclined. A sliding groove is provided on the outside of the docking base, and an extrusion bar is elastically slidably installed inside the sliding groove. The sliding groove communicates with the inside of the movable groove, and one end of the extrusion bar is inclined. The other end of the extrusion bar is correspondingly set with the linkage bar, and one end of the transmission bar is inclined.

[0016] Optionally, a photosensitive positioning sensor is provided at the lower end of the sealed groove, and a photosensitive baffle is provided at one end of each of the multiple sets of rotating disks. The photosensitive positioning sensor is configured in conjunction with the photosensitive baffle.

[0017] Optionally, the fixing component includes multiple sets of clamping plates, and multiple sets of clamping slots are opened on the other side of the rotating disk. The clamping plates are slidably installed inside the clamping slots. A fourth spring is provided on one side of the clamping plate. A lifting plate is fixedly installed on one end of the fourth spring. The lifting plate is slidably installed inside the clamping slot. A lead screw is rotatably installed inside the clamping slot. The lifting plate is threaded onto the outside of the lead screw. A driven bevel gear is fixedly installed on one end of the lead screw. A driving bevel gear is meshed with one side of the driven bevel gear. A transmission gear is rotatably installed on one end of the rotating disk. A synchronization mechanism is drivenly connected to one side of the transmission gear. The synchronization mechanism is drivenly connected to the main bevel gear.

[0018] Optionally, toothed plates are fixedly installed at both ends of the lower part of the material changing trough. One set of toothed plates is meshed with a transmission gear, and the other set of toothed plates is meshed with a synchronization mechanism. A reversing component is provided between the synchronization mechanism and the transmission gear.

[0019] According to one embodiment of the present invention, the sample holder is arranged in a circular pattern with multiple rotating disks at equal intervals around the outside of the rotating rod, so that multiple sample holders can be placed in the sample chamber at the same time. Then, driven by a servo motor, the rotating disks are aligned and connected with the electric push rod. Then, by opening the pneumatic valve, the electric push rod sends the connected rotating disks into the detection chamber for detection. Therefore, the method of automatic rotation and replacement of multiple samples is more efficient than the traditional method of disassembling and replacing one sample at a time, and there is no need for repeated vacuuming.

[0020] Secondly, the design of electromagnets, magnetic plates and docking mechanisms can make the connection between the rotating disk and the connecting frame more stable, and at the same time facilitate the quick connection and disassembly of the electric push rod and the rotating disk, so as to facilitate the electric push rod to send different rotating disks into the testing chamber.

[0021] With the design of a sealed outer shell and a sealed inner shell, after the samples on multiple rotating disks in the sample chamber have been tested, the staff can directly pull out the sealed inner shell, which makes it easy to remove multiple rotating disks and replace and place new sample racks.

[0022] Secondly, through the design of the fixing components, the sample holder can be directly and elastically clamped onto the rotating disk for pre-positioning. Then, as the multiple rotating disks rotate, the multiple clamping plates on the rotating disks can further fix the rear end of the sample holder through the interaction of transmission gears and toothed plates, achieving automatic clamping and positioning. This eliminates the need for manual knob fixing of the sample, thereby further improving sample testing efficiency. Therefore, the design of the fixing components enables rapid pre-positioning and replacement of the sample holder, effectively improving sample replacement efficiency.

[0023] Secondly, through the design of the meshing connection between the synchronization mechanism and the toothed plate, after the rotating disk is rotated away from the electric push rod after the test, the multiple clamps on the other side of the rotating disk will move away from each other, automatically disassembling the loose sample. This makes it convenient for subsequent staff to directly disassemble the tested sample, thereby effectively improving the sample replacement efficiency.

[0024] Through the design of the first spring, the electric push rod pushes the rotating disk into the detection chamber. When the rotating disk comes into contact with the ion source, the first spring always generates a pushing force, which is maintained at a constant value, so that the rotating disk and the ion source are fully in contact, avoiding the sample and the ion source not being able to fully contact, which would affect the glow discharge.

[0025] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0027] Figure 1 This is a schematic diagram of the overall structure of an automatic sample introduction device for a glow discharge mass spectrometer in the invention.

[0028] Figure 2 This is a schematic diagram of the electromagnet structure of an automatic sample introduction device for a glow discharge mass spectrometer in the present invention.

[0029] Figure 3 This is a schematic diagram of the sealed outer shell structure of an automatic sample introduction device for a glow discharge mass spectrometer in the invention.

[0030] Figure 4 This is a schematic diagram of the sealed inner shell structure of an automatic sample introduction device for a glow discharge mass spectrometer in the invention.

[0031] Figure 5 This is a schematic diagram of the photosensitive positioning sensor structure of an automatic sample introduction device for a glow discharge mass spectrometer in the present invention.

[0032] Figure 6This is a schematic diagram of the connecting frame structure of an automatic sample introduction device for a glow discharge mass spectrometer in the invention.

[0033] Figure 7 This is a schematic diagram of the magnetic plate structure of an automatic sample introduction device for a glow discharge mass spectrometer in the present invention.

[0034] Figure 8 An automatic sample introduction device for a glow discharge mass spectrometer is being developed. Figure 7 A magnified structural diagram at point A;

[0035] Figure 9 An automatic sample introduction device for a glow discharge mass spectrometer is being developed. Figure 7 A magnified structural diagram at point B;

[0036] Figure 10 This is a schematic diagram of the rotating disk structure of an automatic sample introduction device for a glow discharge mass spectrometer in the present invention.

[0037] Figure 11 An automatic sample introduction device for a glow discharge mass spectrometer is being developed. Figure 10 A magnified structural diagram at point C;

[0038] Figure 12 This is a schematic diagram of the rod-shaped sample holder structure of an automatic sample loading device for a glow discharge mass spectrometer in the present invention.

[0039] Figure 13 This is a schematic diagram of the sheet-like sample holder structure of an automatic sample loading device for a glow discharge mass spectrometer according to the invention.

[0040] The diagram shows the following components: 1. Sample chamber; 2. Pre-positioning mechanism; 3. Electric push rod; 4. Detection chamber; 5. Electromagnet; 6. First spring; 7. Docking mechanism; 8. Photosensitive positioning sensor; 9. Photosensitive baffle; 10. Second spring; 11. Third spring; 12. Pneumatic valve; 13. First bevel gear; 14. Second bevel gear; 15. Hollow shell; 16. Rod-shaped sample holder; 17. Sheet-shaped sample holder; 101. Sealed outer shell; 102. Sealed inner shell; 101. Servo motor ; 202, Rotating rod; 203, Connecting frame; 204, Rotating disk; 205, Fixed component; 2051, Synchronization mechanism; 2052, Clamping plate; 2053, Fourth spring; 2054, Lifting plate; 2055, Lead screw; 2056, Main bevel gear; 2057, Driven bevel gear; 2058, Transmission gear; 206, Gear plate; 701, Transmission bar; 702, Connecting base; 703, Magnetic plate; 704, Fastening plate; 705, Extrusion bar; 706, Linkage bar. Detailed Implementation

[0041] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0042] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0043] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0044] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0045] Example 1:

[0046] like Figures 1 to 12 As shown, an automatic sample introduction device for a glow discharge mass spectrometer includes:

[0047] Sample chamber 1 and detection chamber 4 are connected by a pneumatic valve 12, so that sample chamber 1 and detection chamber 4 are interconnected through the pneumatic valve 12. An electric push rod 3 is provided on one side of sample chamber 1.

[0048] The prepositioning mechanism 2 includes multiple sets of rotating disks 204 and a driving component. The rotating disks 204 are detachably installed inside the sample chamber 1. The multiple sets of rotating disks 204 are all rotated inside the sample chamber 1 by the driving component. The center of the lower rotating disk 204 is set at the same horizontal level as the central axis of the moving rod of the electric push rod 3.

[0049] The docking mechanism 7 is provided on the same side of multiple sets of rotating disks 204, so that the rotating disks 204 are detachably connected to the electric push rods 3 through the docking mechanism 7.

[0050] The prepositioning mechanism 2 also includes a fixing component 205. The sample holder is detachably mounted on the other side of the rotating disk 204 via the fixing component 205. The fixing component 205 is connected to the sample chamber 1 via a drive component.

[0051] like Figures 1 to 12 As shown, through the design of multiple rotating disks 204, different sample holders can be placed on multiple rotating disks 204, and multiple sample holders can be interchanged with each other through the cooperation of rotating disks 204 and driving components, and dock with electric push rod 3. Therefore, there is no need to repeatedly evacuate and disassemble a single sample holder for testing, which can effectively improve the sample testing efficiency.

[0052] Secondly, the design of the docking mechanism 7 facilitates the quick docking and connection of the electric push rod 3 with the rotating disk 204, thereby making it easier for the electric push rod 3 to dock with different rotating disks 204 and to send them into the testing chamber 4 for testing operations.

[0053] Secondly, the design of the fixing component 205 allows for the pre-positioning of the sample holder placed on the rotating disk 204. As the rotating disk 204 rotates and is replaced by the drive component, after the rotating disk 204 moves to the designated position, the fixing component 205 is driven to fix the rear end of the sample holder on the rotating disk 204. After the sample holder on the rotating disk 204 is replaced by the rotation, it can be loosened by the fixing component 205, thus loosening the rear end of the sample holder. This facilitates the quick disassembly and replacement of samples on the rotating disk 204 by the staff, thereby effectively improving the practicality of the glow discharge mass spectrometer.

[0054] Furthermore, the sample chamber 1 is composed of a sealed outer shell 101 and a sealed inner shell 102. The sealed outer shell 101 is connected to the inside of the detection chamber 4 through a pneumatic valve 12. A sealing groove is provided at the upper end of the sealed outer shell 101. The sealed inner shell 102 is slidably inserted into the sealing groove. A material exchange groove is provided on the outside of the sealed inner shell 102. Multiple sets of rotating disks 204 are all arranged inside the material exchange groove.

[0055] like Figures 1 to 12 As shown, through the design of the sealed outer shell 101 and the sealed inner shell 102, the sealed inner shell 102 can be directly slid out as a single unit, which makes it convenient for staff to replace the samples placed inside the sealed inner shell 102, thereby improving convenience.

[0056] Furthermore, the driving component includes a servo motor 201, which is disposed in the sealed housing 101. A clearance groove is provided on one side of the sealed housing 101. One end of the output shaft of the servo motor 201 passes through the clearance groove into the material changing trough. A rotating rod 202 is fixedly installed on one end of the output shaft of the servo motor 201. Multiple sets of connecting brackets 203 are fixedly installed on the outside of the rotating rod 202. The connecting brackets 203 and the rotating disk 204 are detachably disposed.

[0057] like Figures 1 to 12 As shown, through the design of the servo motor 201, the rotating rod 202, and the connecting frame 203, multiple rotating disks 204 can rotate synchronously through the cooperation of the servo motor 201, the rotating rod 202, and the connecting frame 203. This allows multiple rotating disks 204 to be rotated and replaced, thus facilitating the continuous pushing of different samples into the detection chamber 4 by the electric push rod 3 for detection. Therefore, the detection efficiency is effectively improved.

[0058] Furthermore, a sliding groove is provided on one side of the connecting frame 203, and one end of the rotating disk 204 is slidably installed inside the sliding groove. A fastening component is provided inside the sliding groove, so that one end of the rotating disk 204 is detachably installed inside the sliding groove through the fastening component. The fastening component includes a fastening plate 704, and a fastening groove is provided on one side of the sliding groove. The fastening plate 704 is slidably installed inside the fastening groove, and one end of the fastening plate 704 is inclined. A second spring 10 is provided inside the fastening groove, and a transmission bar 701 is fixedly installed on one end of the second spring 10. The transmission bar 701 is slidably installed inside the fastening groove and is fixedly connected to the fastening plate 704.

[0059] like Figures 1 to 12 As shown, through the design of fastening components and sliding grooves, the rotating disk 204 can be more stably installed on the connecting frame 203 by cooperating with the fastening plate 704 through the second spring 10. This prevents the multiple rotating disks 204 from shaking during the rotation of the servo motor 201, which could cause the sample to fall off. Furthermore, the design of the sliding grooves facilitates the separation of the rotating disk 204 from the connecting frame 203, thereby making it easier for the rotating disk 204 to enter the detection chamber 4 for detection operations.

[0060] Furthermore, the docking mechanism 7 includes an electromagnet 5 and a magnetic plate 703. The magnetic plate 703 is disposed on one side of the rotating disk 204. One end of the movable rod of the electric push rod 3 is provided with a groove, and a first spring 6 is disposed inside the groove. One end of the first spring 6 is fixedly connected to the electromagnet 5. The electromagnet 5 is slidably installed inside the groove, and the electromagnet 5 is magnetically connected to the magnetic plate 703.

[0061] like Figures 1 to 12 As shown, through the design of electromagnet 5 and magnetic plate 703, electric push rod 3 can be quickly connected to rotating disk 204 through electromagnet 5 and magnetic plate 703, so that electric push rod 3 can quickly send rotating disk 204 into detection chamber 4 for detection operation.

[0062] Secondly, it should be noted that through the design of the first spring 6, the elasticity generated by the first spring 6 ensures that the rotating disk 204 always generates a continuous thrust. Thus, when the rotating disk 204 is in contact with the ion source, the thrust can be maintained at a constant value under the elastic action of the first spring 6, thereby avoiding the sample not being in close contact with the ion source and affecting the glow discharge detection.

[0063] Furthermore, the docking mechanism 7 also includes a docking base 702, which is fixedly installed on one side of the rotating disk 204. A movable groove is provided on one side of the docking base 702. A magnetic plate 703 is slidably installed inside the movable groove. Two sets of linkage bars 706 are fixedly installed on the outside of the magnetic plate 703. Both sets of linkage bars 706 are slidably installed inside the movable groove. The same end of both sets of linkage bars 706 is inclined. A sliding groove is provided on the outside of the docking base 702. An extrusion bar 705 is elastically slidably installed inside the sliding groove. The sliding groove is connected to the inside of the movable groove. One end of the extrusion bar 705 is inclined. The other end of the extrusion bar 705 is correspondingly set with the linkage bar 706. One end of the transmission bar 701 is inclined.

[0064] like Figures 1 to 12 As shown, the design of the magnetic plate 703 slidingly installed inside the movable groove allows the electromagnet 5 placed on one end of the movable rod of the electric push rod 3 to approach the rotating disk 204. When the electromagnet 5 is close to the rotating disk 204, the electromagnet 5 is energized and generates magnetic force. The magnetic plate 703 can automatically attract the electromagnet 5. During the process of approaching and attracting, the magnetic plate 703 slides inside the movable groove. At the same time, during the sliding process, the magnetic plate 703 can drive the linkage bar 706. The linkage bar 706 horizontally squeezes the extrusion bar 705 by the inclined surface at one end, so that the extrusion bar 705 slides laterally by the extrusion of the inclined surface. The extrusion bar 705 can then squeeze the transmission bar 701, so that the transmission bar 701 drives the fastening plate 704 to go deeper into the fastening groove. This prevents the fastening plate 704 from squeezing the part of the rotating disk 204 inside the sliding groove, thus facilitating the separation of the rotating disk 204 from the connecting frame 203.

[0065] For example, a third spring 11 is provided inside the chute, and one end of the third spring 11 is fixedly connected to the extrusion bar 705.

[0066] Secondly, as the electric push rod 3 pushes the rotating disk 204, the magnetic plate 703 slides inside the movable groove to achieve reset. The two sets of pressing bars 705 are reset under the elastic action of the third spring 11, and the two sets of transmission bars 701 can also be reset under the elastic action of the second spring 10. Thus, the fastening plate 704 can be reset after the rotating disk 204 is separated from the connecting frame 203.

[0067] It should be further explained that, due to the inclined design of one end of the fastening plate 704, when the rotating disk 204 slides close to the connecting frame 203 via the electric push rod 3, one end of the rotating disk 204 can smoothly and smoothly enter the sliding groove along the inclined angle. When one end of the rotating disk 204 is fully inside the sliding groove, the magnetic plate 703 can repeat the above action to make the fastening plate 704 deeply penetrate into the fastening groove. Subsequently, after the electromagnet 5 is de-energized, the magnetic plate 703 and the electromagnet 5 are disconnected, and the linkage bar 706 connected to the magnetic plate 703 can automatically reset under the elastic action of the pressing bar 705 and the third spring 11, which facilitates the continuous connection of the electric push rod 3.

[0068] Furthermore, a photosensitive positioning sensor 8 is provided at the lower end of the sealed groove, and a photosensitive baffle 9 is provided at one end of multiple rotating disks 204. The photosensitive positioning sensor 8 and the photosensitive baffle 9 are configured in conjunction.

[0069] like Figures 1 to 12 As shown, through the cooperative design of the photosensitive positioning sensor 8 and the photosensitive baffle 9, when the rotating disk 204 rotates close to the movable end of the electric push rod 3, and the rotating disk 204 is placed vertically with the bottom of the material changing trough, the photosensitive baffle 9, in conjunction with the photosensitive positioning sensor 8, stops the servo motor 201 from rotating, thus completing the precise alignment of the rotating disk 204 and the electric push rod 3, thereby facilitating the precise docking of the electric push rod 3 with the corresponding rotating disk 204.

[0070] Furthermore, the fixing component 205 includes multiple sets of clamping plates 2052, and multiple sets of clamping grooves are opened on the other side of the rotating disk 204. The clamping plates 2052 are slidably installed inside the clamping grooves. A fourth spring 2053 is provided on one side of the clamping plate 2052. A lifting plate 2054 is fixedly installed at one end of the fourth spring 2053. The lifting plate 2054 is slidably installed inside the clamping groove. A lead screw 2055 is rotatably installed inside the clamping groove. The lifting plate 2054 is threaded onto the outside of the lead screw 2055. A driven bevel gear 2057 is fixedly installed at one end of the lead screw 2055. A drive bevel gear is meshed with one side of the bevel gear 2057, and a transmission gear 2058 is rotatably mounted on one end of the rotating disk 204. A synchronization mechanism 2051 is driven to one side of the transmission gear 2058, and the synchronization mechanism 2051 is driven to the main bevel gear 2056. Tooth plates 206 are fixedly installed at both ends of the lower part of the material changing trough. One set of tooth plates 206 is meshed with the transmission gear 2058, and the other set of tooth plates 206 is meshed with the synchronization mechanism 2051. A reversing component is provided between the synchronization mechanism 2051 and the transmission gear 2058.

[0071] like Figures 1 to 12As shown, the design incorporates a lifting plate 2054 fixedly mounted at one end of the fourth spring 2053. Under the elastic force of the fourth spring 2053, multiple clamping plates 2052 can approach each other, facilitating clamping of the rear end of the sample holder and achieving pre-fixation. Subsequently, as the rotating disk 204 rotates, the transmission gear 2058 meshes with one set of toothed plates 206, driving the synchronization mechanism 2051. The synchronization mechanism 2051 then drives the main bevel gear 2056 to rotate, and the main bevel gear 2056 meshes with the driven bevel gear 2057. 2057 drives the lead screw 2055 to rotate, which in turn drives the lifting plate 2054 to approach the clamping plate 2052, thus gradually fixing the clamping plate 2052 in an effective position. Therefore, when the clamping plate 2052 becomes loose, the lead screw 2055 rotates in the opposite direction by relying on the synchronous mechanism 2051 meshing with another set of toothed plates 206. Thus, when changing samples, the staff only needs to place the rear end of the sample holder between multiple clamping plates 2052, without the need for manual fixing, which can realize the fixing and disassembly of the sample holder on the rotating disk 204. Therefore, the sample changing efficiency is effectively improved.

[0072] Specifically, such as Figures 1 to 12 As shown, the aforementioned reversing component is designed with two sets of second bevel gears 14 and one set of first bevel gears 13. The two sets of second bevel gears 14 are respectively fixedly installed on opposite sides of the ends of the transmission gear 2058 and the synchronization mechanism 2051, and the first bevel gear 13 is disposed between the two sets of second bevel gears 14. Both sets of second bevel gears 14 are meshed with the first bevel gear 13, so that when the transmission gear 2058 and the synchronization mechanism 2051 mesh and rotate on their respective meshing tooth plates 206, the lead screw 2055 can rotate in both directions.

[0073] Specifically, such as Figures 1 to 12 As shown, the clamping plate 2052 has an arc-shaped groove on one side, and the rotating disk 204 has a hollow shell 15 on one side. The hollow shell 15 has a through hole on the outside, and the through hole is corresponding to the clamping groove, so that the clamping plate 2052 can pass through the inside of the through hole.

[0074] The hollow shell 15 design allows staff to easily insert the rear end of the product sample rack into the hollow shell 15, where it is elastically pre-positioned and clamped by multiple sets of clamping plates 2052.

[0075] It should be noted that the two sets of toothed plates 206 mentioned above are staggered front to back, which facilitates the meshing and rotation of the transmission gear 2058 and the synchronization mechanism 2051.

[0076] For example, the synchronization mechanism 2051 described above uses two sets of synchronization pulleys and timing belts in combination. Using two sets of synchronization pulleys and timing belts for synchronous transmission is a mature existing technology. The outer side of the synchronization pulleys is provided with tooth grooves that mesh with the toothed plate 206. The other set of synchronization pulleys is fixedly connected to the main bevel gear 2056. Those skilled in the art should know how to install and use the synchronization mechanism 2051 so that the lead screw 2055 rotates when the synchronization mechanism 2051 meshes with the toothed plate 206. Therefore, the invention will not elaborate further here.

[0077] In summary, the present invention, through the cooperation of the sample chamber 1, the pre-positioning mechanism 2, the docking mechanism 7 and the photosensitive positioning sensor 8, can effectively reduce repetitive manual operation steps in the GDMS analysis process, improve sample testing efficiency, and reduce errors caused by manual operation.

[0078] Example 2:

[0079] Inside the hollow shell 15, rod-shaped sample holders 16 and sheet-shaped sample holders 17 are detachably connected via multiple sets of clamps 2052, with the rear ends of rod-shaped sample holders 16 and sheet-shaped sample holders 17 located inside the hollow shell 15.

[0080] For example, such as Figures 1 to 13 As shown, through the design of multiple sets of close-to-each clamping plates 2052, the hollow shell 15 can easily clamp the rear ends of the rod-shaped sample holder 16 and the sheet-shaped sample holder 17 through the clamping plates 2052, enabling quick replacement and fixation.

[0081] Working principle:

[0082] The operator loads all the sample holders to be tested onto the rotating disk 204 at once, and then slides the inner sealed shell 102 into the outer sealed shell 101, and evacuates the sample chamber. The rotation self-checks the position of each rotating disk 204. When one set of rotating disks 204 rotates to the sample injection position, the photosensitive positioning sensor 8 provides feedback and confirms whether the position is correct. Then, the electric push rod 3 is activated, and the electromagnet 5 is energized. The movable rod of the electric push rod 3 drives the electromagnet 5 to approach one set of rotating disks 204 and magnetically connects with the magnetic plate 703. The pneumatic valve 12 opens, connecting the sample chamber 1 and the detection chamber 4. The electric push rod 3 pushes the rotating disk 204 into the detection chamber 4. When the sample holder on the rotating disk 204 contacts the ion source, the first spring 6 continuously generates a pushing force, making the fit tighter and avoiding affecting the glow discharge. After the detection is completed, the electric push rod 3 returns the rotating disk 204 to the sample injection position and disengages from the rotating disk 204. The rotating disk 204 automatically rotates the next rotating disk 204 to the sample injection position, and the electric push rod 3 connects to the new rotating disk 204. The above detection process is repeated until all samples have been detected. When the last rotary disk 204 returns to the sample inlet position, the pneumatic valve closes, the sample chamber is de-vacuumed, and the operator can open the hatch to replace a new batch of samples or rotary disk 204.

[0083] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An automatic sample introduction device for a glow discharge mass spectrometer, characterized in that: include: A sample chamber (1) and a detection chamber (4) are provided. A pneumatic valve (12) is provided between the sample chamber (1) and the detection chamber (4), so that the sample chamber (1) and the detection chamber (4) are interconnected through the pneumatic valve (12). An electric push rod (3) is provided on one side of the sample chamber (1). The prepositioning mechanism (2) includes multiple sets of rotating disks (204) and driving components. The rotating disks (204) are detachably installed inside the sample chamber (1). The multiple sets of rotating disks (204) are rotated inside the sample chamber (1) by the driving components. The center of the rotating disk (204) located at the bottom is set at the same horizontal level as the central axis of the moving rod of the electric push rod (3). The docking mechanism (7) is provided on the same side of multiple sets of rotating disks (204), so that the rotating disk (204) is detachably connected to the electric push rod (3) through the docking mechanism (7); The prepositioning mechanism (2) also includes a fixing component (205), the sample is detachably mounted on the other side of the rotating disk (204) via the fixing component (205), and the fixing component (205) is connected to the sample chamber (1) via a driving component.

2. The automatic sample introduction device for a glow discharge mass spectrometer according to claim 1, characterized in that: The sample chamber (1) is composed of a sealed outer shell (101) and a sealed inner shell (102). The sealed outer shell (101) is connected to the inside of the detection chamber (4) through a pneumatic valve (12). A sealing groove is provided at the upper end of the sealed outer shell (101). The sealed inner shell (102) is slidably inserted into the sealing groove. A material exchange groove is provided on the outside of the sealed inner shell (102). Multiple sets of rotating disks (204) are arranged inside the material exchange groove.

3. The automatic sample introduction device for a glow discharge mass spectrometer according to claim 2, characterized in that: The driving component includes a servo motor (201), which is disposed in a sealed housing (101). A clearance groove is provided on one side of the sealed housing (101). One end of the output shaft of the servo motor (201) passes through the clearance groove into the material changing trough. A rotating rod (202) is fixedly installed on one end of the output shaft of the servo motor (201). Multiple sets of connecting frames (203) are fixedly installed on the outside of the rotating rod (202). The connecting frame (203) and the rotating disk (204) are detachably disposed.

4. The automatic sample introduction device for a glow discharge mass spectrometer according to claim 3, characterized in that: The connecting frame (203) has a sliding groove on one side, and one end of the rotating disk (204) is slidably installed inside the sliding groove. The sliding groove is provided with fastening components, so that one end of the rotating disk (204) can be detachably installed inside the sliding groove through the fastening components.

5. The automatic sample introduction device for a glow discharge mass spectrometer according to claim 4, characterized in that: The fastening component includes a fastening plate (704). A fastening groove is provided on one side of the sliding groove. The fastening plate (704) is slidably installed inside the fastening groove. One end of the fastening plate (704) is inclined. A second spring (10) is provided inside the fastening groove. A transmission bar (701) is fixedly installed on one end of the second spring (10). The transmission bar (701) is slidably installed inside the fastening groove. The transmission bar (701) is fixedly connected to the fastening plate (704).

6. The automatic sample introduction device for a glow discharge mass spectrometer according to claim 5, characterized in that: The docking mechanism (7) includes an electromagnet (5) and a magnetic plate (703). The magnetic plate (703) is located on one side of the rotating disk (204). One end of the movable rod of the electric push rod (3) is provided with a groove, and a first spring (6) is provided inside the groove. One end of the first spring (6) is fixedly connected to the electromagnet (5). The electromagnet (5) is slidably installed inside the groove. The electromagnet (5) is magnetically connected to the magnetic plate (703).

7. The automatic sample introduction device for a glow discharge mass spectrometer according to claim 6, characterized in that: The docking mechanism (7) further includes a docking base (702), which is fixedly installed on one side of the rotating disk (204). A movable groove is provided on one side of the docking base (702). The magnetic plate (703) is slidably installed inside the movable groove. Two sets of linkage bars (706) are fixedly installed on the outside of the magnetic plate (703). Both sets of linkage bars (706) are slidably installed inside the movable groove. The same end of both sets of linkage bars (706) is inclined. A sliding groove is provided on the outside of the docking base (702). An extrusion bar (705) is elastically slidably installed inside the sliding groove. The sliding groove is connected to the inside of the movable groove. One end of the extrusion bar (705) is inclined. The other end of the extrusion bar (705) is correspondingly set with the linkage bar (706). One end of the transmission bar (701) is inclined.

8. An automatic sample introduction device for a glow discharge mass spectrometer according to claim 7, characterized in that: A photosensitive positioning sensor (8) is provided at the lower end of the sealed groove, and a photosensitive baffle (9) is provided at one end of each of the multiple rotating disks (204). The photosensitive positioning sensor (8) and the photosensitive baffle (9) are configured in cooperation.

9. An automatic sample introduction device for a glow discharge mass spectrometer according to claim 8, characterized in that: The fixing component (205) includes multiple sets of clamping plates (2052). Multiple clamping slots are provided on the other side of the rotating disk (204). The clamping plates (2052) are slidably installed inside the clamping slots. A fourth spring (2053) is provided on one side of the clamping plate (2052). A lifting plate (2054) is fixedly installed at one end of the fourth spring (2053). The lifting plate (2054) is slidably installed inside the clamping slots. A lead screw (2055) is rotatably installed inside the clamping slots. The lifting plate (2054) is threaded onto the outside of the lead screw (2055). A driven bevel gear (2057) is fixedly installed at one end of the lead screw (2055). A driving bevel gear is meshed with one side of the driven bevel gear (2057). A transmission gear (2058) is rotatably installed at one end of the rotating disk (204). A synchronization mechanism (2051) is driven to one side of the transmission gear (2058). The synchronization mechanism (2051) is driven to the main bevel gear (2056).

10. An automatic sample introduction device for a glow discharge mass spectrometer according to claim 9, characterized in that: Both ends of the lower part of the material changing trough are fixedly installed with toothed plates (206). One set of toothed plates (206) is meshed with the transmission gear (2058), and the other set of toothed plates (206) is meshed with the synchronization mechanism (2051). A reversing component is provided between the synchronization mechanism (2051) and the transmission gear (2058).

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